Display panel and display device

Abstract

The present disclosure discloses a display panel and a display device, the display panel comprising a substrate, an isolation structure located on the substrate, a display function layer, and a first sealing layer. The isolation structure is located on the substrate and has a first end and a second end, the second end being located on a side away from the substrate of the first end, and an orthographic projection of the first end on the substrate is within an orthographic projection of the second end, and the isolation structure defines a plurality of first openings. The display function layer includes light-emitting elements located in the first openings. The first sealing layer is located on a side away from the substrate of the display function layer. On the substrate, an orthographic projection of a portion of an edge portion of at least some of the light-emitting elements is within an orthographic projection of the second end. This design allows the width of a portion of the isolation structure between adjacent first openings to be reduced.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This disclosure claims priority to Chinese Patent Application No. 202310855866.X filed on July 13, 2023, Chinese Patent Application No. 202310356240.4 filed on March 31, 2023, Chinese Patent Application No. 202311275756.2 filed on September 28, 2023, Chinese Patent Application No. 202310392090.2 filed on April 9, 2023, and Chinese Patent Application No. 202310759370.2 filed on June 26, 2023. , claims priority to Chinese Patent Application No. 202310369642.8 filed on April 9, 2023, priority to Chinese Patent Application No. 202310854721.8 filed on July 12, 2023, priority to Chinese Patent Application No. 202310369659.3 filed on April 9, 2023, and priority to Chinese Patent Application No. 202310853873.6 filed on July 12, 2023, the entire disclosures of which are incorporated herein by reference.

[0002] The present disclosure relates to the field of display technology, and in particular to display panels and display devices. [Background technology]

[0003] Organic light-emitting diodes (OLEDs) are organic thin-film electroluminescent devices that have attracted much attention due to their low energy consumption, high brightness, wide viewing angle, high contrast, and the possibility of flexible display. OLEDs are widely used in electronic display products. Summary of the Invention [Problem to be solved by the invention]

[0004] However, current electronic display products are limited in their structural design, and further improvements in pixel density are required. [Means for solving the problem]

[0005] A first aspect of the present disclosure provides a display panel. The display panel includes a substrate, a display functional layer, and an isolation structure. The display functional layer includes a plurality of light-emitting elements, each including a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked on the substrate. The light-emitting functional layer has an effective functional area, and the light-emitting functional layer includes a first functional layer. The isolation structure is located on the substrate and surrounds the light-emitting functional layer. The isolation structure includes an isolation portion having a first end facing the substrate and a second end away from the substrate, wherein an orthographic projection of the effective functional area on the substrate is outside an orthographic projection of the second end of the isolation structure, and an orthographic projection of an edge of the first functional layer on the substrate is outside an orthographic projection of the first end and inside an orthographic projection of the second end. In a cross section perpendicular to the substrate, on one side of the isolation structure, the acute angle formed by the line determined by the edge of the first functional layer and the edge of the second end and the plane of the substrate is a second tilt angle, the tangent of the acute angle formed by the line determined by the edge of the effective functional area and the edge of the second end and the plane of the substrate is less than the tangent of the second tilt angle, and the ratio of the height difference between the edge of the first end and the edge of the second end in a direction perpendicular to the plane of the substrate to the distance between the edge of the first end and the edge of the second end in a direction parallel to the plane of the substrate is less than the tangent of the second tilt angle.

[0006] For example, the layer thickness of the portion of the first functional layer located within the effective functional region is uniform.

[0007] In the above-described embodiment, the first deposition angle is determined based on the boundary of the effective functional area and the height of the second end (its edge), and the extension position of the edge of the first functional layer is determined based on the first deposition angle and the height of the second end. Based on the principle that the first functional layer is isolated by the isolation portion, the distance between the extension position and the second end can be estimated, and thus the selectable range of the edge position of the second end can be estimated. In this way, relationships can be established between parameters such as the edge of the effective functional area, the edge of the first functional layer, the width (edge ​​position of the first end and the second end) and height (height difference between the edges of the first end and the second end) of the isolation portion, and the deposition angle. Furthermore, by taking into account the selectable range of the width dimension of the first end (with a lower limit), the selectable range of the effective functional area width and the selectable range of the main light-emitting area width (including the maximum width) can be estimated. Therefore, the specific pixel density design requirement can be met, the maximum design width of the main light-emitting region can be obtained, and the design area of ​​the main light-emitting region in the actual process (the width in this area can be equal to the maximum design width or slightly smaller than the maximum design width) can be ensured, thereby maintaining the first functional layer separated by the isolation portion and improving the array density of the light-emitting elements.

[0008] In one specific embodiment of the first aspect of the present disclosure, the isolation structure defines a plurality of first openings, the light-emitting functional layer and the second electrode are located in the first openings, the isolation portion has a conductive portion, the second electrode is connected to the conductive portion of the isolation portion, and on the substrate, the orthogonal projection of the first end of the isolation portion facing the substrate is within the orthogonal projection of the second end of the isolation portion facing away from the substrate.

[0009] In a specific embodiment of the first aspect of the present disclosure, in a cross section perpendicular to the substrate, on one side of the isolation structure, the acute angle formed by the line defined by the edge of the second electrode and the edge of the second end and the plane of the substrate is a first tilt angle, which is smaller than the second tilt angle. The acute angle formed by the line defined by the edge of the effective functional area and the edge of the second end and the plane of the substrate is equal to or smaller than the first tilt angle. For example, the layer thickness of the portion of the second electrode located within the effective functional area is uniform.

[0010] In the above-described embodiment, the minimum designable dimension of the lateral distance between the edge of the effective functional area and the edge of the second end portion can be obtained on the premise that the layer thicknesses of all layers in the second electrode and the light-emitting functional layer are uniformly distributed in the effective functional area, thereby obtaining the minimum distance between adjacent effective functional areas, thereby maintaining the isolation of the first functional layer by the isolation portion and improving the array density of the light-emitting elements (corresponding to pixel density).

[0011] In one specific embodiment of the first aspect of the present disclosure, in a cross section perpendicular to the substrate, on one side of the isolation structure, the acute angle formed by the straight line defined by the edge of the first end (e.g., the edge of the surface facing the substrate) and the edge of the second end, and the plane on which the substrate is located is greater than or equal to the first tilt angle and less than or equal to the second tilt angle.

[0012] In the above-described embodiment, the minimum designable dimension of the lateral spacing between the edge of the first end portion and the edge of the second end portion can be obtained, which in turn allows the minimum spacing between adjacent effective functional areas to be obtained, thereby maintaining the first functional layer isolated by the isolation portion and improving the array density of the light-emitting elements (corresponding to pixel density).

[0013] For example, the acute angle formed by the line defined by the edge of the first end and the edge of the second end and the plane of the substrate is greater than the first tilt angle, so that the second electrode at least partially overlaps and contacts the side surface of the first end.

[0014] In the above-described embodiment, an overlapping bond between the second electrode and the first end of the isolation structure can be ensured, and the thickness of the portion of the second electrode that bonds with the isolation structure is made relatively large, thereby avoiding poor contact or excessive resistance at the bond.

[0015] In a specific embodiment of the first aspect of the present disclosure, the acute angle formed by the line defined by the edge of the effective functional area and the edge of the second end and the plane of the substrate is equal to the first tilt angle, and the acute angle formed by the line defined by the edge of the first end and the edge of the second end and the plane of the substrate is equal to the second tilt angle.

[0016] In the above-described embodiment, on the premise that the layer thickness of each layer of the light-emitting element in the effective functional area is guaranteed to be uniform, the lateral distance between the edge of the effective functional area and the edge of the second end, and the lateral distance between the edge of the first end and the edge of the second end are all designed to be minimum, thereby minimizing the distance between adjacent effective functional areas, thereby maintaining the first functional layer isolated by the isolation portion and maximizing the array density of the light-emitting elements (corresponding to pixel density).

[0017] In a specific embodiment of the first aspect of the present disclosure, the isolation structure is an integrated structure. For example, the cross-sectional shape of the isolation portion between two adjacent subpixels in a direction perpendicular to the substrate is an inverted trapezoid, and the top side of the inverted trapezoid is between the substrate and the base side of the inverted trapezoid. The edge of the surface of the first end facing the substrate is the edge of the first end, and the edge of the surface of the second end facing away from the substrate is the edge of the second end.

[0018] In another specific embodiment of the first aspect of the present disclosure, the isolation portion includes a support portion and a stop portion stacked in this order on the substrate, with the support portion constituting the first end and the stop portion constituting the second end. For example, the cross-sectional contour shape of the portion of the support portion between two adjacent subpixels in a direction perpendicular to the substrate is a regular trapezoid, the isolation structure is located on the top edge of the support portion, and the edge of the surface of the support portion facing the substrate is the edge of the first end. For example, the cross-sectional shape of the portion of the stop portion between two adjacent subpixels in a direction perpendicular to the substrate is a regular trapezoid, and the edge of the surface of the stop portion facing the support portion is the edge of the second end.

[0019] In a specific embodiment of the first aspect of the present disclosure, the light-emitting functional layer further includes a light-emitting layer and a second functional layer, the first functional layer, the light-emitting layer, and the second functional layer being located between the first electrode and the second electrode and stacked in that order on the first electrode, and on the substrate, an orthogonal projection of an edge of either the light-emitting layer or the second functional layer is between an orthogonal projection of an edge of the first functional layer and an orthogonal projection of an edge of the second electrode.

[0020] In a specific embodiment of the first aspect of the present disclosure, the display panel may further include a pixel definition layer. The pixel definition layer is located between the isolation structure and the layer containing the first electrodes and covers the gaps between adjacent first electrodes. The pixel definition layer defines second openings, and the light-emitting functional layer covers the second openings, the second openings corresponding to and communicating with the first openings. In the substrate, the orthogonal projections of the second openings are within the orthogonal projections of the corresponding first openings.

[0021] In the above-described embodiment, by designing the pixel definition layer, the risk of the first electrode overlapping with an adjacent isolation structure (e.g., a first end of a conductive layer) can be avoided, and therefore the first electrode can have a large design dimension, ensuring the design area of ​​the effective functional region.

[0022] For example, the cross-sectional shape of the pixel definition layer perpendicular to the substrate at a portion between two adjacent subpixels is a regular trapezoid, and on one side of the isolation structure, the acute angle formed by the line defined by the edge of the surface of the pixel definition layer away from the substrate and the edge of the second end portion and the plane of the substrate is equal to the second tilt angle.

[0023] In the above-described embodiment, the second electrode has a relatively large layer thickness on the sidewall (with inclination) of the pixel definition layer, thereby preventing poor layer continuity of the second electrode due to a step.

[0024] For example, the cross-sectional shape of the pixel definition layer perpendicular to the substrate at a portion between two adjacent subpixels is a regular trapezoid, and on one side of the isolation structure, the acute angle formed by the line defined by the edge of the surface of the pixel definition layer facing the substrate and the edge of the second end portion and the plane of the substrate is equal to the first tilt angle.

[0025] In the above-described embodiment, the boundary of the second opening of the pixel definition layer overlaps with the boundary of the effective functional area, and therefore the light-emitting area of ​​the light-emitting element overlaps with the effective functional area. This allows the light-emitting parts of the light-emitting area to have the maximum light-emitting efficiency and improve light emission uniformity. Correspondingly, this design ensures the maximum light-emitting efficiency of the light-emitting element and also allows the boundary of the pixel definition layer to have an extendible range, thereby achieving the maximum design width of the pixel definition layer (the width of the part between two adjacent first openings) and contributing to the planning of the width of the inter-pixel gap (the gap between the light-emitting areas of adjacent light-emitting elements).

[0026] In a specific embodiment of the first aspect of the present disclosure, the orthogonal projection of the gap between adjacent first electrodes on the substrate overlaps with the orthogonal projection of the surface of the first end facing the substrate on the substrate. In this manner, the minimum designable width of the first end of the isolation structure can be obtained, thereby obtaining the minimum spacing between adjacent effective functional areas. This allows the first functional layer to be kept isolated by the isolation portion while improving the array density of light-emitting elements (corresponding to pixel density).

[0027] In another specific embodiment of the first aspect of the present disclosure, the orthogonal projection of the gap between adjacent first electrodes on the substrate is within the orthogonal projection of the surface of the first end facing the substrate on the substrate, thereby ensuring that the first end of the isolation structure completely covers the groove formed in the surface of the pixel definition layer due to the gap between the first electrodes, thereby ensuring the manufacturing yield of the isolation structure.

[0028] In a specific embodiment of the first aspect of the present disclosure, the portion of the pixel definition layer covering the gap between the first electrodes is conformal to the gap between the first electrodes, and the pixel definition layer is an inorganic material layer. In this way, the pixel definition layer has a small thickness, which ensures the continuity of the second electrode at the opening of the pixel definition layer and prevents the pixel definition layer from becoming too thick, which would result in an excessive height of the isolation structure (which would affect the gap dimension of the effective functional area). This further improves the pixel density or the design area of ​​the effective functional area of ​​the display panel (which is related to the light emission area of ​​the pixel, aperture ratio, etc.).

[0029] A second aspect of the present disclosure provides a display panel. The display panel includes a substrate, an isolation structure located on the substrate, a display function layer, and a first sealing layer. The isolation structure is located on the substrate and has a first end and a second end, the second end being on a side away from the substrate from the first end, and an orthographic projection of the first end on the substrate is within an orthographic projection of the second end, and the isolation structure defines a plurality of first openings. The display function layer is located on the substrate and includes a plurality of light-emitting elements located in corresponding first openings. The light-emitting elements include a first electrode, a light-emitting function layer, and a second electrode stacked on the substrate, and the first openings position the corresponding light-emitting elements. The first sealing layer is located on the side away from the substrate from the display function layer. On the substrate, an orthographic projection of a portion of an edge portion of at least some of the layers of the light-emitting elements is within an orthographic projection of the second end.

[0030] Optionally, along a direction from the center of the light-emitting element to the corresponding edge, at least some layers of the light-emitting element have a gradually decreasing thickness at the edge portion.

[0031] In the above-described embodiment, the gradually reduced thickness of at least some layers at the edge of the light-emitting element means that these layers are deposited using the isolation structure. In addition, the thickness of the light-emitting element at the edge of the second end is smaller than the thickness of its central portion, so that the height of the isolation structure can be designed using this to ensure the sealing effect of the first encapsulation layer and to make the height of the isolation structure relatively low, thereby further reducing the width of the isolation structure between adjacent first openings, thereby improving the aperture ratio and pixel density of the display panel.

[0032] Optionally, the display panel includes a plurality of subpixels, each having two opposing long sides and two opposing short sides, and some of the subpixels have edge portions only on the short sides where the thickness gradually decreases along a direction from the center of the light-emitting element to the corresponding edge, but do not have edge portions on the long sides where the thickness gradually decreases along a direction from the center of the light-emitting element to the corresponding edge.

[0033] In a specific embodiment of the second aspect of the present disclosure, the distance from the edge of the second end to the edge of the first end in a direction perpendicular to the plane of the substrate is the first height. In a front cross section of the light-emitting element, the distance in a direction perpendicular to the plane of the substrate between the edge of the first end and a position on a line passing through the edge of the second end of the surface of the first encapsulating layer facing the substrate, which is perpendicular to the plane of the substrate, is the isolation-related height. The difference between the first height and the isolation-related height is equal to or greater than the encapsulation safety margin value.

[0034] The distance from the edge of the second end to the edge of the first end in a direction perpendicular to the plane of the substrate is a first height, and the distance between the first encapsulating layer and the first electrode at the center of the light-emitting device is a second height. The product of the second height and the first thickness coefficient is a first value, and the difference between the first height and the first value is equal to or greater than the encapsulation safety margin value.

[0035] In the above-described embodiment, the sealing degree of the first encapsulating layer can be controlled by adjusting the difference between the first height and the first numerical value and the difference between the sealing safety margin value, thereby ensuring that the first encapsulating layer achieves the basic sealing effect and balancing the relationship between the sealing effect of the first encapsulating layer and the height of the isolation structure, thereby satisfying different sealing requirements and obtaining the minimum width of the isolation structure between adjacent first openings, thereby further improving the aperture ratio and pixel density of the display panel.

[0036] Optionally, the first thickness factor is greater than or equal to M and less than 1, where M is 0.5±0.2.

[0037] Optionally, the first thickness factor is equal to M.

[0038] Optionally, M is a ratio value between the isolation-related height and the second height.

[0039] Optionally, the first thickness factor is greater than or equal to 0.5 and less than 1.

[0040] In a specific embodiment of the second aspect of the present disclosure, the first encapsulating layer has a second thickness at the center of the light-emitting element, the first encapsulating layer covers the light-emitting element and a portion of the side surface at the second end, and the encapsulating safety margin is equal to the product of the second thickness and the second thickness coefficient. The encapsulating safety margin is set according to the protection needs of related layers such as the light-emitting element, thereby ensuring the basic encapsulating effect of the first encapsulating layer.

[0041] Optionally, the first sealing layer forms a closed chamber at a side of the isolation structure, and the second thickness factor is 0.2-2.

[0042] Optionally, the second thickness factor is 0.25-1.2, and more preferably, the second thickness factor is 0.3-0.8.

[0043] Optionally, the display panel includes a plurality of subpixels, each having two opposing long sides and two opposing short sides, and some of the subpixels have edge portions only on the short sides where the thickness gradually decreases along a direction from the center of the light-emitting element to the corresponding edge, but do not have edge portions on the long sides where the thickness gradually decreases along a direction from the center of the light-emitting element to the corresponding edge.

[0044] In a specific embodiment of the second aspect of the present disclosure, the distance between the orthogonal projection of the edge of the second end portion and the orthogonal projection of the edge of the first end portion on the plane of the substrate is the first width. In a front cross-section of the light-emitting device, the acute angle formed by a line passing through the edge of the second electrode and the edge of the second end portion intersecting with the plane of the substrate is the first tilt angle. The first width is smaller than the product of the first height and the cotangent of the first tilt angle. The first tilt angle may represent the deposition angle when the second electrode is vapor-deposited. By controlling the numerical relationship between the first width, the first height, and the deposition angle, it is possible to ensure that the edge of the second electrode is overlapped and bonded to the isolation structure (e.g., its first end portion), thereby ensuring that the second electrode of the light-emitting device is connected to an external circuit (e.g., a common electrode line or other pixel driving circuit) via the isolation structure.

[0045] Optionally, the second electrode has an upturned portion that overlaps and is joined to a side surface of the first end.

[0046] Optionally, in the front cross section of the light-emitting device, the acute angle formed by a line passing through the edge of the light-emitting functional layer and the second end edge intersecting with the plane of the substrate is the light-emitting functional layer tilt angle, which is greater than the first tilt angle.

[0047] Optionally, the first width is greater than the product of the first height and the cotangent value of the tilt angle of the light-emitting functional layer.

[0048] Optionally, the light-emitting functional layer includes a first functional layer, and in the front cross section of the light-emitting device, a straight line passing through the edge of the first functional layer and the second end edge intersects with the plane of the substrate to form a second tilt angle, which is greater than the tilt angle of the light-emitting functional layer. According to this design, the edge of the first functional layer is spaced farther from the isolation structure than the edge of the entire light-emitting functional layer. This prevents the first functional layers from being connected to each other by the isolation structure, thereby avoiding the problem of reduced light-emitting efficiency of the display panel due to current leakage.

[0049] Optionally, the light-emitting functional layer further includes a light-emitting layer and a second functional layer, and the light-emitting layer and the second functional layer cover the edge of the first functional layer. This design can avoid the first functional layer from directly connecting to the second electrode beyond the light-emitting layer and the second functional layer, thereby ensuring the light-emitting effect of the light-emitting element.

[0050] Optionally, in a front cross section of the light-emitting element, the thickness of the second electrode at a position passing through the edge of the first electrode and perpendicular to the plane on which the substrate is located is smaller than the thickness of a portion of the second electrode corresponding to the central position of the light-emitting element.

[0051] In a specific embodiment of the second aspect of the present disclosure, the orthogonal projection of the second end of the substrate is between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the first end. According to this design, the edge of the first electrode does not extend to the edge of the second end. This avoids increasing the height of the surface of the light-emitting device at the edge by providing the first electrode, and provides sufficient space for the first encapsulation layer to ensure a good encapsulation effect. Correspondingly, the design height of the entire isolation structure can be reduced, thereby further reducing the width of the isolation structure between adjacent first openings.

[0052] Optionally, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end on the substrate is smaller than the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance in a direction perpendicular to the plane of the substrate from the central part of the lower surface of the light-emitting functional layer to the edge of the second end.

[0053] In the above-described embodiment, the first electrode can be ensured to have a sufficiently large area, and the first electrode is present throughout the region where the light-emitting functional layer has a uniform thickness (e.g., the above-described effective functional region). This increases the area of ​​the uniform light-emitting region of the light-emitting device (where the light-emitting functional layer has a uniform thickness) and improves the aperture ratio of the display panel. In addition, this embodiment provides sufficient margin for alignment accuracy between the first electrode and the isolation structure, ensuring that the area and position of the uniform light-emitting region of the light-emitting device are not affected even if there is a misalignment between the first electrode and the isolation structure.

[0054] Optionally, in a front cross section of the light-emitting element, the product of the cotangent value of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance in a direction perpendicular to the plane of the substrate from the central part of the lower surface of the light-emitting functional layer to the edge of the second end is less than the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end on the substrate.

[0055] In the above-described embodiment, the thickness of the light-emitting functional layer is always uniform in the region where the first electrode is distributed in the light-emitting device, thereby ensuring that the wavelengths of the light emitted from the light-emitting region of the light-emitting device are relatively consistent, and avoiding the problem of mist of different colors in the light-emitting device.

[0056] In a specific embodiment of the second aspect of the present disclosure, the display panel may further include a pixel definition layer located on the first electrode and on a side of the isolation portion facing the substrate, the pixel definition layer defining a second opening, the first electrode being exposed through the second opening and the edge of the first end portion being within the upper surface of the pixel definition layer.

[0057] In the above-described embodiment, the pixel definition layer allows the first electrode to have a relatively large area, and there is no need to consider the alignment accuracy issue between the first electrode and the isolation structure in the manufacturing process.

[0058] Optionally, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the portion of the first electrode exposed from the second opening and the orthogonal projection of the edge of the second end on the substrate is smaller than the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance in a direction perpendicular to the plane of the substrate from the central part of the lower surface of the light-emitting functional layer to the edge of the second end.

[0059] In the above-described embodiment, the first electrode is present over the entire region of the light-emitting functional layer where the layer thickness is uniform (for example, the above-described effective functional region), thereby increasing the area of ​​the uniform light-emitting region of the light-emitting element (where the layer thickness of the light-emitting functional layer is uniform) and improving the aperture ratio of the display panel.

[0060] Optionally, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is less than the distance between the orthogonal projection of the edge of the part of the first electrode exposed from the second opening and the orthogonal projection of the edge of the second end on the substrate.

[0061] In the above-described embodiment, the thickness of the light-emitting functional layer is always uniform in the region where the first electrode is distributed in the light-emitting device, thereby ensuring that the wavelengths of the light emitted from the light-emitting region of the light-emitting device are relatively consistent, and avoiding the problem of mist of different colors in the light-emitting device.

[0062] Optionally, the pixel defining layer is an inorganic layer, and a portion of the pixel defining layer covering the gap between adjacent first electrodes has a recess conformal to the gap, and a surface of the first end facing the substrate covers the recess.

[0063] In the above-described embodiment, the inorganic pixel definition layer can have a small thickness, thereby reducing the step at the edge of the pixel definition layer and improving the continuity of the second electrode at the edge. This embodiment also reduces the increase in height of the isolation structure due to the pixel definition layer. Furthermore, because the first end completely covers the recess, the effect of the recess on the isolation structure is avoided, ensuring that the height of each point at the edge of the first end is uniform.

[0064] Optionally, the distance from the central portion of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is equal to the sum of the first height and the thickness of the pixel defining layer.

[0065] In a specific embodiment of the second aspect of the present disclosure, the display panel may further include a protective layer, which is an insulating layer and includes a plurality of protective units located between the first electrode and the first end.

[0066] In the above-described embodiment, the first electrode can be protected using the protective layer during the process of manufacturing the isolation structure, thereby preventing side corrosion of the first electrode and improving the yield of light emitting devices.

[0067] Alternatively, the protection unit covers the sidewall of the first electrode and is spaced apart from the first end of the isolation structure, or the protection unit covers the sidewall of the first electrode and the sidewall of the first end.

[0068] In the above-described embodiment, the bonding strength between the protection unit and the substrate is higher, and the first electrode is sandwiched between the protection unit and the substrate, thereby reducing the risk of the first electrode falling off from the substrate.

[0069] Optionally, a straight line perpendicular to the plane of the substrate and passing through the edge of the second end passes through the protection unit.

[0070] Selectively, the protection unit is spaced apart from the first end of the isolation structure, and in a direction perpendicular to the plane of the substrate, a distance between an edge of the second end and an edge of the first end in a direction perpendicular to the plane of the substrate is a first height; in a front cross section of the light-emitting device, a distance between a position on a line passing through the edge of the second end of the surface of the first encapsulating layer facing the substrate and the edge of the first end in a direction perpendicular to the plane of the substrate is an isolation-related height, and a difference between the first height and the isolation-related height is equal to or greater than a sealing safety margin value; Or, In a direction perpendicular to the plane of the substrate, the distance from the edge of the second end to the edge of the first end is a first height; at the center of the light-emitting device, the distance between the first encapsulation layer and the first electrode is a second height; the product of the second height and the first thickness coefficient is a first value; the sum of the first value and the thickness of the protection unit is a second value; the difference between the first height and the second value is equal to or greater than the encapsulation safety margin; optionally, the first thickness coefficient is equal to or greater than M and less than 1, where M is 0.5±0.2; more preferably, M is the ratio of the isolation-related height to the second height; more preferably, the first thickness coefficient is equal to M; Or, the protective layer covers a sidewall of the first electrode and a part of the sidewall of the first end, and in a direction perpendicular to the plane of the substrate, a distance between an edge of the second end and an edge of the first end is a first height; in a front cross section of the light-emitting device, a distance between a position on a line passing through the edge of the second end and perpendicular to the plane of the substrate, of a surface of the first sealing layer facing the substrate, and the edge of the first end is an isolation-related height; and a difference between the first height and the isolation-related height is equal to or greater than a sealing safety margin value; Or, In a direction perpendicular to the plane of the substrate, the distance from the edge of the second end to the edge of the first end is a first height, the distance between the first encapsulating layer and the first electrode at the center of the light-emitting element is a second height, the product of the second height and the first thickness coefficient is a first value, and the difference between the first height and the first value is equal to or greater than the encapsulation safety margin. Optionally, the first thickness coefficient is equal to or greater than M and less than 1, where M is 0.5±0.2, and more preferably, M is the ratio of the isolation-related height to the second height, and more preferably, the first thickness coefficient is equal to M.

[0071] Optionally, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the substrate where the first electrode is exposed from the protective layer and the orthogonal projection of the edge of the second end is smaller than the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance in a direction perpendicular to the plane of the substrate from the central part of the lower surface of the light-emitting functional layer to the edge of the second end.

[0072] In the above-described embodiment, by adjusting the area of ​​the first electrode covered by the protective unit of the protective layer, the first electrode can be present over the entire area of ​​the light-emitting functional layer where the layer thickness is uniform (e.g., the above-described effective functional area), thereby increasing the area of ​​the uniform light-emitting area of ​​the light-emitting device (where the layer thickness of the light-emitting functional layer is uniform) and improving the aperture ratio of the display panel. In addition, in this embodiment, a sufficient margin is provided for the alignment accuracy of the first electrode and the isolation structure, so that even if there is a misalignment between the first electrode and the isolation structure, the area and position of the uniform light-emitting area of ​​the light-emitting device are not affected. Optionally, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is less than the distance between the orthogonal projection of the edge of the part of the substrate where the first electrode is exposed from the protective layer and the orthogonal projection of the edge of the second end.

[0073] In the above-described embodiment, by adjusting the area of ​​the first electrode covered by the protective unit of the protective layer, the layer thickness of the light-emitting functional layer can be made uniform in the area of ​​the light-emitting device where the first electrode is distributed, thereby ensuring that the wavelengths of the light emitted from the light-emitting area of ​​the light-emitting device are relatively consistent, and eliminating the problem of mist of different colors existing in the light-emitting device.

[0074] Optionally, the first end includes a connecting portion on the side facing the substrate. The connecting portion and the first electrode are in the same layer and made of the same material. In this configuration, the connecting portion can be manufactured simultaneously during the process of manufacturing the first electrode, thereby relaxing the thickness requirement for the isolation structure. In addition, by connecting the isolation structure to the substrate using the connecting portion, the risk of the isolation structure falling off the substrate is reduced.

[0075] Optionally, the protection unit is spaced apart from the first end of the isolation structure, and the substrate includes a first planar layer and a second planar layer on a side facing the isolation structure. The second planar layer is located between the first planar layer and the isolation structure and between the first planar layer and the first electrode. The first planar layer is an organic layer, and the second planar layer is an inorganic layer. In this embodiment, the second planar layer is an inorganic layer, which can improve the bonding strength of the substrate with the isolation structure and the first electrode, thereby reducing the risk of the first electrode and the isolation structure falling off the substrate.

[0076] In a specific embodiment of the second aspect of the present disclosure, the display panel may further include at least one optical functional layer located on a side of the light-emitting functional layer away from the substrate, the optical functional layer including a plurality of optical functional units.

[0077] Optionally, in a front cross section of the light-emitting element, the acute angle formed by the connecting line between the edge of the optical functional unit and the edge of the second end intersecting with the plane of the substrate is equal to or greater than the acute angle formed by the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersecting with the plane of the substrate.

[0078] In the above-described embodiment, the uniformly thick portion of the optical functional unit covers the uniformly thick portion of the light-emitting functional layer, so that as much light as possible emitted from the light-emitting element passes through the uniformly thick portion of the optical functional unit, thereby improving the display effect of the display panel.

[0079] Optionally, the optical functional unit is located between the light-emitting functional layer and the first sealing layer, and the optical functional unit is provided within at least a portion of the first opening, and on the substrate, the orthogonal projection of a portion of the edge portion of the optical functional unit is within the orthogonal projection of the second end, and the thickness of the edge portion of the optical functional unit gradually decreases along the direction from the middle of the light-emitting element to the corresponding edge. In the above-described embodiment, the thickness of at least some layers of the optical functional unit at the edge portions is gradually reduced, which means that these layers are formed by deposition using the isolation structure. In addition, since the thickness of the optical functional unit at the edge of the second end portion is smaller than the thickness of its central portion, the height of the isolation structure can be designed using this to ensure the sealing effect of the first sealing layer and to make the height of the isolation structure relatively small, thereby further reducing the width of the isolation structure between adjacent first openings, thereby improving the aperture ratio and pixel density of the display panel.

[0080] Alternatively, the optical function unit may be configured to include at least one type, which may be one of a color conversion unit, a light extraction unit, a light control unit, a filling unit, and a filter unit, or may be configured to include at least two types, which may be different types of a color conversion unit, a light extraction unit, a light control unit, a filling unit, and a filter unit.

[0081] In the above-described embodiment, when the optical function unit includes a color conversion unit, the light-emitting elements of the display panel can be configured to emit light of the same color, so that each light-emitting element can be manufactured in the same process, simplifying the manufacturing process of the display panel.

[0082] In one specific embodiment of the second aspect of the present disclosure, the standoff comprises a bearing and a stop laminated on the substrate, the bearing defining a first end and the stop defining a second end.

[0083] Optionally, the first sealing layer contacts a surface of the stop, and the first sealing layer and the stop are made of the same material.

[0084] In one specific embodiment of the second aspect of the present disclosure, the bearing is provided with a grid of dividing holes, which divide the bearing into a plurality of sub-bearings, the stoppers cover and fill the dividing holes, the bearing is a conductive structure, the stoppers are an insulating structure, and the second electrodes are connected to the corresponding sub-bearings.

[0085] In the above-described embodiment, by dividing the conductive portion of the isolation portion into sub-support portions by the dividing hole, the second electrodes of the light-emitting elements are independent of each other, and the second electrodes of each light-emitting element can be driven individually.

[0086] In a specific embodiment of the second aspect of the present disclosure, when the isolation portion includes a support portion and a stop portion stacked on the substrate, in a front cross section of the light-emitting element, the stop portion has an inclined sidewall, and the difference between the acute angle formed when the connecting line between the edge of the second electrode and the edge of the second end portion intersects with the plane of the substrate and the acute angle formed when the sidewall of the stop portion intersects with the plane of the substrate is equal to or greater than a predetermined angle.

[0087] In a specific embodiment of the second aspect of the present disclosure, the first end and the second end of the isolation structure are an integrated structure, and in a direction perpendicular to the plane of the substrate, the cross-sectional profile of the isolation structure between two adjacent subpixels is an inverted trapezoid, the bottom edge of the inverted trapezoid is the edge of the second end, and the top edge of the inverted trapezoid is the edge of the first end.

[0088] In a specific embodiment of the second aspect of the present disclosure, the distance between the edges of the first electrodes of adjacent light-emitting elements that contact the corresponding light-emitting functional layers is a pixel spacing, the pixel spacing is 2000-18000 nanometers, and the pixel density of the display panel is 90 PPI to 7400 PPI.

[0089] A third aspect of the present disclosure provides a display panel. The display panel includes a substrate, an isolation structure located on the substrate, a display function layer, a first sealing layer, and at least one optical function layer. The isolation structure is located on the substrate and has a first end and a second end, the second end being located on a side away from the substrate of the first end, and an orthogonal projection of the first end on the substrate is within an orthogonal projection of the second end on the substrate, and the isolation structure defines a plurality of first openings. The display function layer is located on the substrate and includes a plurality of light-emitting elements located in corresponding first openings, the light-emitting elements comprising a first electrode, a light-emitting function layer, and a second electrode stacked on the substrate, and the first openings position the corresponding light-emitting elements. The first sealing layer is located on the side away from the substrate of the display function layer. The optical function layer is located on the side away from the substrate of the light-emitting function layer and includes a plurality of optical function units. On the substrate, an orthogonal projection of a portion of an edge portion of at least some of the layers of the light-emitting elements is within an orthogonal projection of the second end. Optionally, the thickness of the edge portion of at least some layers of the light emitting element gradually decreases along a direction from the center of the light emitting element to the corresponding edge.

[0090] In one specific embodiment of the third aspect of the present disclosure, the optical functional unit is located between the light-emitting functional layer and the first sealing layer, and the optical functional unit is provided in at least a part of the first opening.

[0091] Optionally, the optical functional unit is located between the light-emitting functional layer and the first sealing layer, and the orthogonal projection of a portion of the edge portion of the optical functional unit on the substrate is within the orthogonal projection of the second end, and the thickness of the edge portion of the optical functional unit gradually decreases along the direction from the middle of the light-emitting element to the corresponding edge.

[0092] In one specific embodiment of the third aspect of the present disclosure, the distance from the edge of the second end to the edge of the first end in a direction perpendicular to the plane of the substrate is the first height, and in a front cross section of the light-emitting element, the distance in a direction perpendicular to the plane of the substrate between the position of the surface of the first sealing layer facing the substrate on a line passing through the edge of the second end and perpendicular to the plane of the substrate and the edge of the first end is the isolation-related height, and the difference between the first height and the isolation-related height is equal to or greater than the sealing safety margin value.

[0093] In one specific embodiment of the third aspect of the present disclosure, the distance from the edge of the second end to the edge of the first end in a direction perpendicular to the plane of the substrate is a first height, the distance between the first encapsulating layer and the first electrode at the center of the light-emitting element is a second height, the product of the second height and the first thickness coefficient is a first value, and the difference between the first height and the first value is equal to or greater than the encapsulation safety margin value.

[0094] Optionally, the first thickness coefficient is greater than or equal to M and less than 1, where M is 0.5±0.2, and further optionally, M is a value of the ratio between the isolation-related height and the second height, and further optionally, the first thickness coefficient is equal to M.

[0095] In one specific embodiment of the third aspect of the present disclosure, the thickness of the first encapsulating layer at a central position of the light-emitting element is a second thickness, the first encapsulating layer covers the light-emitting element and a portion of the side surface of the second end, and the encapsulating safety margin value is equal to the product of the second thickness and the second thickness coefficient.

[0096] Optionally, the first sealing layer forms a closed chamber at a side of the isolation structure, and the second thickness factor is 0.2-2.

[0097] Optionally, the second thickness factor is between 0.25 and 1.2, and more preferably, the second thickness factor is between 0.3 and 0.8.

[0098] Optionally, the display panel includes a plurality of sub-pixels, each having two long sides facing each other and two short sides facing each other, and some of the sub-pixels have edge portions only on the short sides where the thickness gradually decreases along a direction from the center of the light-emitting element to the corresponding edge, but do not have edge portions on the long sides where the thickness gradually decreases along a direction from the center of the light-emitting element to the corresponding edge.

[0099] In one specific embodiment of the third aspect of the present disclosure, the distance between the orthogonal projection of the edge of the second end portion and the orthogonal projection of the edge of the first end portion on the plane of the substrate is a first width. In a front cross section of the light-emitting device, the acute angle formed by the line passing through the edge of the second electrode and the edge of the second end portion intersecting with the plane of the substrate is a first tilt angle, and the first width is smaller than the product of the first height and the cotangent of the first tilt angle.

[0100] Optionally, the second electrode has an upturned portion that overlaps and joins to a side surface of the first end.

[0101] Optionally, in the front cross section of the light-emitting device, the acute angle formed by the line passing through the edge of the light-emitting functional layer and the second end edge intersecting with the plane of the substrate is the light-emitting functional layer inclination angle, which is greater than the first inclination angle.

[0102] Optionally, the first width is greater than the product of the first height and the cotangent value of the tilt angle of the light-emitting functional layer.

[0103] Optionally, the light-emitting functional layer includes a first functional layer, and in a front cross section of the light-emitting element, the acute angle formed by a straight line passing through the edge of the first functional layer and the edge of the second end portion intersecting with the plane of the substrate is a second tilt angle, which is greater than the light-emitting functional layer tilt angle.

[0104] Optionally, the light-emitting functional layer further includes a light-emitting layer and a second functional layer, and the light-emitting layer and the second functional layer cover the edges of the first functional layer.

[0105] Optionally, in a front cross section of the light-emitting element, the thickness of the second electrode at a position passing through the edge of the first electrode and perpendicular to the plane on which the substrate is located is smaller than the thickness of a portion of the second electrode corresponding to the central position of the light-emitting element.

[0106] In one specific embodiment of the third aspect of the present disclosure, on the substrate, the orthogonal projection of the edge of the second end is between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the first end.

[0107] Optionally, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end on the substrate is smaller than the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance in a direction perpendicular to the plane of the substrate from the central part of the lower surface of the light-emitting functional layer to the edge of the second end.

[0108] Optionally, in a front cross section of the light-emitting element, the product of the cotangent value of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is less than or equal to the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end on the substrate.

[0109] In one specific embodiment of the third aspect of the present disclosure, the display panel may further include a pixel definition layer located on the first electrode and on a side of the isolation portion facing the substrate, the pixel definition layer defining a second opening, the first electrode being exposed through the second opening, and an edge of the first end portion being within an upper surface of the pixel definition layer.

[0110] Optionally, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the portion of the first electrode exposed from the second opening and the orthogonal projection of the edge of the second end on the substrate is smaller than the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance in a direction perpendicular to the plane of the substrate from the central part of the lower surface of the light-emitting functional layer to the edge of the second end.

[0111] Optionally, in a front cross section of the light-emitting element, the product of the cotangent value of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is less than the distance between the orthogonal projection of the edge of the part of the first electrode exposed from the second opening and the orthogonal projection of the edge of the second end on the substrate.

[0112] Optionally, the pixel defining layer is an inorganic layer, and a portion of the pixel defining layer covering the gap between adjacent first electrodes has a recess conformal to the gap, and a surface of the first end facing the substrate covers the recess.

[0113] Optionally, the distance from the central portion of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is equal to the sum of the first height and the thickness of the pixel defining layer.

[0114] In a specific embodiment of the third aspect of the present disclosure, the display panel may further include a protective layer, the protective layer being an insulating layer and including a plurality of protective units, the protective units being located between the first electrode and the first end.

[0115] Alternatively, the protection unit covers the sidewall of the first electrode and is spaced apart from the first end of the isolation structure, or the protection unit covers the sidewall of the first electrode and the sidewall of the first end.

[0116] Optionally, a straight line perpendicular to the plane of the substrate and passing through the edge of the second end passes through the protection unit.

[0117] Selectively, the protection unit is spaced apart from the first end of the isolation structure, and in a direction perpendicular to the plane of the substrate, a distance between an edge of the second end and an edge of the first end in a direction perpendicular to the plane of the substrate is a first height; in a front cross section of the light emitting device, a distance between a position on a line passing through the edge of the second end of the surface of the first encapsulating layer facing the substrate and the edge of the first end in a direction perpendicular to the plane of the substrate is an isolation-related height, and a difference between the first height and the isolation-related height is equal to or greater than a sealing safety margin value; Or, In a direction perpendicular to the plane of the substrate, the distance from the edge of the second end to the edge of the first end is a first height; at the center of the light-emitting device, the distance between the first encapsulation layer and the first electrode is a second height; the product of the second height and the first thickness coefficient is a first value; the sum of the first value and the thickness of the protection unit is a second value; the difference between the first height and the second value is equal to or greater than the encapsulation safety margin; optionally, the first thickness coefficient is equal to or greater than M and less than 1, where M is 0.5±0.2; more preferably, M is the ratio of the isolation-related height to the second height; more preferably, the first thickness coefficient is equal to M; Or, the protective layer covers a sidewall of the first electrode and a part of the sidewall of the first end, and in a direction perpendicular to the plane of the substrate, a distance between an edge of the second end and an edge of the first end in a direction perpendicular to the plane of the substrate is a first height; in a front cross section of the light-emitting device, a distance between a position on a line passing through the edge of the second end and perpendicular to the plane of the substrate of the surface of the first sealing layer facing the substrate and the edge of the first end in a direction perpendicular to the plane of the substrate is an isolation-related height, and a difference between the first height and the isolation-related height is equal to or greater than a sealing safety margin value; Or, Along a direction perpendicular to the plane of the substrate, the distance from the edge of the second end to the edge of the first end is a first height, and at the central position of the light-emitting element, the distance between the first sealing layer and the first electrode is a second height, the product of the second height and the first thickness coefficient is a first value, and the difference between the first height and the first value is greater than or equal to the sealing safety margin value, optionally, the first thickness coefficient is greater than M and less than 1, M is 0.5±0.2, and more preferably, M is the ratio value between the isolation-related height and the second height, and more preferably, the first thickness coefficient is equal to M.

[0118] Optionally, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the substrate where the first electrode is exposed from the protective layer and the orthogonal projection of the edge of the second end is smaller than the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance in a direction perpendicular to the plane of the substrate from the central part of the lower surface of the light-emitting functional layer to the edge of the second end. Optionally, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is less than the distance between the orthogonal projection of the edge of the part of the substrate where the first electrode is exposed from the protective layer and the orthogonal projection of the edge of the second end.

[0119] Optionally, the first end has a connection portion on the side facing the substrate, and the connection portion and the first electrode are in the same layer and made of the same material.

[0120] Optionally, the protection unit and the first end of the isolation structure are spaced apart, the substrate includes a first planar layer and a second planar layer on the side facing the isolation structure, the second planar layer is located between the first planar layer and the isolation structure and between the first planar layer and the first electrode, the first planar layer is an organic layer, and the second planar layer is an inorganic layer.

[0121] In one specific embodiment of the third aspect of the present disclosure, the optical functional unit is located between the second electrode and the first sealing layer, and the second height includes the thickness of a portion of the optical functional unit corresponding to the central position of the light-emitting element.

[0122] Optionally, in a front cross section of the light-emitting element, the acute angle formed by the connecting line between the edge of the optical functional unit and the edge of the second end intersecting with the plane of the substrate is equal to or greater than the acute angle formed by the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersecting with the plane of the substrate.

[0123] Optionally, the display panel may further include a pixel definition layer. The pixel definition layer is located on the first electrode and on a side of the isolation portion facing the substrate, and defines a second opening, the first electrode being exposed through the second opening, and the edge of the first end portion is within the upper surface of the pixel definition layer. In a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the optical function unit and the edge of the second end portion intersects with the plane of the substrate and the distance from the central part of the lower surface of the optical function unit to the edge of the second end portion in a direction perpendicular to the plane of the substrate is less than or equal to the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end portion on the substrate.

[0124] Optionally, the distance from the central portion of the lower surface of the optical functional unit to the edge of the second end in a direction perpendicular to the plane of the substrate is equal to the difference between the sum of the first height and the thickness of the pixel definition layer and the distance from the central portion of the lower surface of the optical functional unit to the central portion of the first electrode in a direction perpendicular to the plane of the substrate.

[0125] Alternatively, the optical function unit may be configured to include at least one type, which is one of a color conversion unit, a light extraction unit, a light control unit, a filling unit, and a filter unit, or the optical function unit may be configured to include at least two types, which are different types of a color conversion unit, a light extraction unit, a light control unit, a filling unit, and a filter unit.

[0126] Optionally, the optical function unit is configured to include a color conversion unit, a light extraction unit, a light control unit, a filling unit and a filter unit, wherein the color conversion unit and the filling unit correspond to different light-emitting elements and are arranged in parallel, the filter unit is located on the side of the corresponding color conversion unit or filling unit away from the substrate, the light control unit is located on the side of the corresponding light extraction unit away from the substrate, and the color conversion unit is located on the side of the corresponding light extraction unit close to the substrate or on the side of the corresponding light control unit away from the substrate.

[0127] In one specific embodiment of the third aspect of the present disclosure, the optically functional unit is located on the side of the first encapsulation layer away from the substrate.

[0128] Optionally, the display panel further includes a second sealing layer located on the side of the first sealing layer away from the substrate, the second sealing layer being an organic sealing layer and including a dual-purpose unit that also functions as a color conversion unit.

[0129] Optionally, the display panel further comprises a second encapsulation layer located on the side of the first encapsulation layer away from the substrate, the second encapsulation layer being an organic encapsulation layer, and the color conversion unit being located between the first encapsulation layer and the second encapsulation layer.

[0130] In one specific embodiment of the third aspect of the present disclosure, the light-emitting functional layers of the light-emitting element are all configured to emit a first color light, and the optical functional units include color conversion units, the color conversion units including a first color conversion unit and / or a second color conversion unit, the first color conversion unit configured to convert the first color light into a second color light, and the second color conversion unit configured to convert the first color light into a third color light, and the first color light, the second color light, and the third color light have increasing wavelengths.

[0131] Optionally, the first color light beam, the second color light beam, and the third color light beam emit blue light, green light, and red light, respectively, and the material of the first color conversion unit includes a G-quantum dot material, and the material of the second color conversion unit includes an R-quantum dot material.

[0132] Optionally, the light-emitting functional layer has a laminated structure.

[0133] Optionally, the light-emitting type of the light-emitting functional layer is fluorescent or phosphorescent.

[0134] Optionally, the color conversion unit is located on the side of the second electrode away from the substrate.

[0135] Optionally, the edge of the color conversion unit is spaced apart from the isolation structure.

[0136] In one specific embodiment of the third aspect of the present disclosure, the light-emitting functional layer of the light-emitting element includes at least two light-emitting layers, at least one light-emitting layer configured to emit a first color light, and at least one light-emitting layer configured to emit a second color light, and the color conversion unit includes a first color conversion unit and / or a second color conversion unit, the first color conversion unit configured to convert the first color light into the second color light, and the second color conversion unit configured to convert the first color light into a third color light, wherein the first color light, the second color light, and the third color light have sequentially increasing wavelengths, or the first color light, the third color light, and the second color light have sequentially increasing wavelengths.

[0137] Optionally, the first color light, the second color light, and the third color light are blue light, green light, and red light, respectively, and the material of the first color conversion unit includes a G-quantum dot material, and the material of the second color conversion unit includes an R-quantum dot material.

[0138] Optionally, the first color light beam, the second color light beam, and the third color light beam emit blue light, red light, and green light, respectively, and the material of the first color conversion unit includes an R-quantum dot material, and the material of the second color conversion unit includes a G-quantum dot material.

[0139] Optionally, the light-emitting type of the light-emitting functional layer is fluorescent or phosphorescent.

[0140] Optionally, the quantum dot material comprises perovskite quantum dots and / or II-VI semiconductor quantum dots. Optionally, the perovskite quantum dots comprise at least one of CsPbX3 and CH3NH3PbX3, where X is a halogen atom.

[0141] More preferably, the halogen atoms include at least one of F, Cl, Br, and I.

[0142] More preferably, the II-VI semiconductor quantum dots include at least one of CdSe / ZnS, ZnCdSe / ZnSe / ZnS, CdZnSe / CdZnS / ZnS, CdSe / CdZnSe / ZnS, CdZnSe / ZnS, InP@ZnSeS, ZnSe / ZnS, InP / ZnSe / ZnS, ZnSeTe / ZnSe / ZnSeS / ZnS, ZnSeTe / ZnSe / ZnS, and ZnSe / ZnS.

[0143] Preferably, the layer thickness of the color conversion unit is 500-10,000 nanometers, more preferably, the layer thickness of the color conversion unit is 600-3,000 nanometers, and even more preferably, the layer thickness of the color conversion unit is 800-1,200 nanometers.

[0144] In one specific embodiment of the third aspect of the present disclosure, the optical functional unit is configured to include at least a filling unit and a color conversion unit, and the color conversion unit includes a red conversion unit provided on the side of the light-emitting functional layer of the light-emitting element that emits red light rays that is away from the substrate, and a green conversion unit provided on the side of the light-emitting functional layer of the light-emitting element that emits green light rays that is away from the substrate, and the filling unit is provided on the side of the light-emitting functional layer of the light-emitting element that emits blue light rays that is away from the substrate.

[0145] In one specific embodiment of the third aspect of the present disclosure, the optical functional unit is configured to include at least a light extraction unit and is located between the corresponding light-emitting element and the corresponding color conversion unit, or on the side of the color conversion unit away from the substrate.

[0146] Optionally, the light extraction unit includes a first extraction sublayer, or the light extraction unit includes a first extraction sublayer, a second extraction sublayer located on a side of the first extraction sublayer facing the substrate, and a third extraction sublayer located on a side of the first extraction sublayer away from the substrate, wherein the refractive indices of the second and third extraction sublayers are all smaller than the refractive index of the first extraction sublayer.

[0147] Optionally, the refractive index of the first extraction sublayer is 2.0-2.3, and more preferably, the refractive index of the first extraction sublayer is 2.1-2.2.

[0148] Optionally, the thickness of the first extraction sublayer is 45-75 nanometers, and further optionally, the thickness of the first extraction sublayer is 55-65 nanometers.

[0149] Optionally, the refractive index of the second and / or third extraction sublayer is 1.4-1.8, and more optionally, the refractive index of the second and / or third extraction sublayer is 1.5-1.6.

[0150] Optionally, the second and / or third extraction sublayers have a thickness of 7-30 nanometers, and more optionally, the second and / or third extraction sublayers have a thickness of 10-20 nanometers.

[0151] In one specific embodiment of the third aspect of the present disclosure, the optical function unit is provided to include at least a light control unit, and is located on a side of the corresponding light extraction unit away from the substrate.

[0152] Optionally, the light control unit is located between the corresponding light extraction unit and the corresponding color conversion unit.

[0153] Optionally, the material of the light control unit is a LiF material.

[0154] Optionally, the thickness of the light control unit is 65-100 nanometers, and further optionally, the thickness of the light control unit is 75-85 nanometers.

[0155] In one specific embodiment of the third aspect of the present disclosure, the standoff comprises a bearing and a stop laminated on the substrate, the bearing constituting a first end and the stop constituting a second end.

[0156] Optionally, the first sealing layer contacts a surface of the stop, and the first sealing layer and the stop are made of the same material.

[0157] In one specific embodiment of the third aspect of the present disclosure, the bearing is provided with a grid of dividing holes, the bearing is divided into a plurality of sub-bearings by the dividing holes, the stoppers cover and fill the dividing holes, the bearing is a conductive structure, the stoppers are an insulating structure, and the second electrodes are connected to the corresponding sub-bearings.

[0158] In one specific embodiment of the third aspect of the present disclosure, the isolation portion comprises a support portion and a stop portion stacked on the substrate, and in a front cross section of the light-emitting element, the stop portion has a sloping sidewall, and the difference between the acute angle formed when the connecting line between the edge of the second electrode and the edge of the second end portion intersects with the plane of the substrate and the acute angle formed when the sidewall of the stop portion intersects with the plane of the substrate is equal to or greater than a predetermined angle.

[0159] In one specific embodiment of the third aspect of the present disclosure, the first end and the second end of the isolation structure are an integrated structure, and in a direction perpendicular to the plane of the substrate, the cross-sectional profile of the isolation structure between two adjacent subpixels is an inverted trapezoid, the bottom edge of the inverted trapezoid is the edge of the second end, and the top edge of the inverted trapezoid is the edge of the first end.

[0160] In one specific embodiment of the third aspect of the present disclosure, the optical function unit is configured to include at least a filter unit and a color conversion unit, the filter unit is located on the side of the corresponding color conversion unit away from the substrate, and a blocking portion is provided between adjacent filter units.

[0161] Optionally, the filter unit is located between the corresponding color conversion unit and the first sealing layer, and some of the isolation structures also serve as blocking portions.

[0162] In one specific embodiment of the third aspect of the present disclosure, the spacing between the edges of the first electrodes of adjacent light-emitting elements that contact the corresponding light-emitting functional layers is a pixel spacing, the pixel spacing is 2000-18000 nanometers, and the pixel density of the display panel is 90 PPI to 7400 PPI.

[0163] A fourth aspect of the present disclosure provides a display panel. The display panel includes a substrate, an isolation structure located on the substrate, a display function layer, and a first encapsulation layer. The isolation structure is located on the substrate and has a first end and a second end, the second end being located on a side away from the first end, and an orthogonal projection of the first end on the substrate is within an orthogonal projection of the second end, and the isolation structure defines a plurality of first openings. The display function layer is located on the substrate and includes a plurality of light-emitting elements located in corresponding first openings, the light-emitting elements comprising a first electrode, a light-emitting function layer, and a second electrode stacked on the substrate, and the first openings position the corresponding light-emitting elements. The first sealing layer is located on the side of the display function layer away from the substrate, and the distance from the edge of the second end to the edge of the first end in a direction perpendicular to the plane of the substrate is the first height, and in a front cross section of the light-emitting element, the distance in a direction perpendicular to the plane of the substrate between the position of the surface of the first sealing layer facing the substrate on a line passing through the edge of the second end and perpendicular to the plane of the substrate and the edge of the first end is the isolation-related height, and the difference between the first height and the isolation-related height is greater than or equal to the sealing safety margin value. In one specific embodiment of the fourth aspect of the present disclosure, at a central position of the light-emitting element, the distance between the first encapsulating layer and the first electrode is a second height, the product of the second height and a first thickness coefficient is a first numerical value, and the difference between the first height and the first numerical value is equal to or greater than a encapsulation safety margin value. Optionally, the first thickness coefficient is equal to or greater than M and less than 1, where M is 0.5±0.2, and further optionally, M is a value of the ratio between the isolation-related height and the second height, and further optionally, the first thickness coefficient is equal to M.

[0164] In one specific embodiment of the fourth aspect of the present disclosure, the thickness of the first encapsulating layer at the center of the light-emitting element is the second thickness, the first encapsulating layer covers the light-emitting element and a portion of the side surface of the second end, and the encapsulation safety margin value is equal to the product of the second thickness and the second thickness coefficient.

[0165] Optionally, the second thickness factor is 0.2-2. Even more preferably, the second thickness factor is 0.25-1.2. Even more preferably, the second thickness factor is 0.3-0.8.

[0166] In one specific embodiment of the fourth aspect of the present disclosure, the distance between the orthogonal projection of the edge of the second end and the orthogonal projection of the edge of the first end on the plane of the substrate is a first width, and in the front cross section of the light-emitting element, the acute angle formed by the line passing through the edge of the second electrode and the edge of the second end intersecting with the plane of the substrate is a first tilt angle, and the first width is smaller than the product of the first height and the cotangent of the first tilt angle.

[0167] Optionally, in the front cross section of the light-emitting device, the acute angle formed by the line passing through the edge of the light-emitting functional layer and the edge of the second end intersecting with the plane of the substrate is the light-emitting functional layer inclination angle, which is greater than the first inclination angle.

[0168] Optionally, the first width is greater than the product of the first height and the cotangent value of the tilt angle of the light-emitting functional layer.

[0169] Optionally, the light-emitting functional layer includes a first functional layer, and in a front cross section of the light-emitting element, the acute angle formed by a straight line passing through the edge of the first functional layer and the edge of the second end portion intersecting with the plane of the substrate is a second tilt angle, which is greater than the light-emitting functional layer tilt angle.

[0170] Optionally, the light-emitting functional layer further includes a light-emitting layer and a second functional layer, and the light-emitting layer and the second functional layer cover the edges of the first functional layer.

[0171] Optionally, in a front cross section of the light-emitting element, the thickness of the second electrode at a position passing through the edge of the first electrode and perpendicular to the plane on which the substrate is located is smaller than the thickness of a portion of the second electrode corresponding to the central position of the light-emitting element.

[0172] In one specific embodiment of the fourth aspect of the present disclosure, on the substrate, the orthogonal projection of the edge of the second end is between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the first end.

[0173] Optionally, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end on the substrate is smaller than the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance in a direction perpendicular to the plane of the substrate from the central part of the lower surface of the light-emitting functional layer to the edge of the second end.

[0174] Optionally, in a front cross section of the light-emitting element, the product of the cotangent value of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance in a direction perpendicular to the plane of the substrate from the central part of the lower surface of the light-emitting functional layer to the edge of the second end is less than the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end on the substrate.

[0175] In one specific embodiment of the fourth aspect of the present disclosure, the display panel may further include a pixel definition layer located on the first electrode and on a side of the isolation portion facing the substrate, the pixel definition layer defining a second opening, the first electrode being exposed through the second opening, and an edge of the first end being within the upper surface of the pixel definition layer.

[0176] Optionally, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the portion of the first electrode exposed from the second opening and the orthogonal projection of the edge of the second end on the substrate is smaller than the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance in a direction perpendicular to the plane of the substrate from the central part of the lower surface of the light-emitting functional layer to the edge of the second end.

[0177] Optionally, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is less than the distance between the orthogonal projection of the edge of the part of the first electrode exposed from the second opening and the orthogonal projection of the edge of the second end on the substrate.

[0178] Optionally, the pixel defining layer is an inorganic layer, and a portion of the pixel defining layer covering the gap between adjacent first electrodes has a recess conformal to the gap, and a surface of the first end facing the substrate covers the recess.

[0179] Optionally, the distance from the central portion of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is equal to the sum of the first height and the thickness of the pixel defining layer.

[0180] In one specific embodiment of the fourth aspect of the present disclosure, the isolation portion comprises a bearing portion and a stop portion stacked on the substrate, the bearing portion constituting a first end and the stop portion constituting a second end.

[0181] Optionally, the first sealing layer contacts a surface of the stop, and the first sealing layer and the stop are made of the same material.

[0182] In one specific embodiment of the fourth aspect of the present disclosure, the bearing is provided with a grid-like dividing hole, the bearing is divided into a plurality of sub-bearings by the dividing hole, the stopper covers and fills the dividing hole, the bearing is a conductive structure, the stopper is an insulating structure, and the second electrode is connected to the corresponding sub-bearing.

[0183] In one specific embodiment of the fourth aspect of the present disclosure, the isolation portion comprises a support portion and a stop portion stacked on the substrate, and in a front cross section of the light-emitting element, the stop portion has a sloping sidewall, and the difference between the acute angle formed when the connecting line between the edge of the second electrode and the edge of the second end portion intersects with the plane of the substrate and the acute angle formed when the sidewall of the stop portion intersects with the plane of the substrate is equal to or greater than a predetermined angle.

[0184] In one specific embodiment of the fourth aspect of the present disclosure, the first end and the second end of the isolation structure are an integrated structure, and in a direction perpendicular to the plane of the substrate, the cross-sectional profile of the isolation structure between two adjacent subpixels is an inverted trapezoid, the bottom edge of the inverted trapezoid is the edge of the second end, and the top edge of the inverted trapezoid is the edge of the first end.

[0185] In one specific embodiment of the fourth aspect of the present disclosure, the spacing between the edges of the first electrodes of adjacent light-emitting elements that contact the corresponding light-emitting functional layers is a pixel spacing, the pixel spacing is 2000-18000 nanometers, and the pixel density of the display panel is 90 PPI to 7400 PPI.

[0186] A fifth aspect of the present disclosure provides a display panel comprising: a substrate; an isolation structure and a display functional layer disposed on the substrate; the isolation structure has a first end and a second end, the second end being located on a side of the first end facing away from the substrate; the isolation structure defines a plurality of first openings; the display functional layer includes a plurality of light-emitting elements disposed in corresponding first openings, the light-emitting elements each comprising a first electrode, a light-emitting functional layer, and a second electrode disposed on the substrate; an orthogonal projection of the light-emitting functional layer on the substrate is outside the orthogonal projection of the first end and inside the orthogonal projection of the second end; a pixel interval between edges of the first electrodes of adjacent light-emitting elements that contact the corresponding light-emitting functional layers, the pixel interval being 2,000-18,000 nanometers.

[0187] In one specific embodiment of the fifth aspect of the present disclosure, in a front cross section of the light-emitting element, the cross-sectional profile of the isolation portion between two adjacent subpixels is an inverted trapezoid, the bottom edge of the inverted trapezoid is the second end edge, and the top edge of the inverted trapezoid is the first end edge, and the width of the top edge of the inverted trapezoid is 1500-16000 nanometers.

[0188] In another specific embodiment of the fifth aspect of the present disclosure, the separator includes a support and a stopper laminated on the substrate, the support constituting a first end and the stopper constituting a second end. In a front cross section of the light-emitting device, the cross-sectional contours of the support and the stopper between two adjacent subpixels are both regular trapezoids, with the edge of the second end being the edge of the stopper's surface facing the substrate and the edge of the first end being the edge of the support's surface facing the substrate. Here, the width of the base of the regular trapezoid corresponding to the support is 1258-17000 nanometers, and the width of the top of the regular trapezoid corresponding to the support is 880-15000 nanometers.

[0189] In one specific embodiment of the fifth aspect of the present disclosure, a display panel may include a plurality of pixels, each of which includes a plurality of sub-pixels emitting light of different wavelengths, the sub-pixels of the plurality of pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel, and the first sub-pixel, the second sub-pixel, and the third sub-pixel each include a different light-emitting element.

[0190] Optionally, the ratio of the number of the first sub-pixels, the second sub-pixels and the third sub-pixels is 1:1:1.

[0191] Alternatively, in each pixel, the first sub-pixel, the second sub-pixel, and the third sub-pixel are arranged in parallel in a first type pixel arrangement configuration, or in each pixel, the second sub-pixel and the third sub-pixel are arranged in one column / row and in parallel to the first sub-pixel in a second type pixel arrangement configuration.

[0192] Optionally, the greater the pixel density, the smaller the pixel spacing and / or the smaller the average width of the sub-pixels.

[0193] In one specific embodiment of the fifth aspect of the present disclosure, the isolation portion of the isolation structure directly contacts the substrate, the edge of the first gap is the edge of the portion of the first electrode that contacts the light-emitting functional layer of the same light-emitting element, the distance between the orthogonal projection of the edge of the second end and the edge of the first end on the substrate plane is the first width, and the distance between the orthogonal projection of the edge of the portion of the first electrode that contacts the light-emitting functional layer of the same light-emitting element and the edge of the second end on the substrate plane is the first gap. In this case, the pixel spacing is 2000-2200 nanometers, the first spacing is 0-1017 nanometers, and the first width is 148-417 nanometers. Or, the pixel spacing is 2200-2500 nanometers, the first spacing is 0-1050 nanometers, and the first width is 166-450 nanometers. Alternatively, the pixel spacing may be 2500-3200 nanometers, the first spacing may be 0-1090 nanometers, and the first width may be 185-490 nanometers. Alternatively, the pixel spacing may be 3200-4000 nanometers, the first spacing may be 0-1130 nanometers, and the first width may be 203-530 nanometers. Alternatively, the pixel spacing may be 4000-6000 nanometers, the first spacing may be 0-1170 nanometers, and the first width may be 221-570 nanometers. Alternatively, the pixel spacing may be 6000-9000 nanometers, the first spacing may be 0-1210 nanometers, and the first width may be 240-610 nanometers. Alternatively, the pixel spacing may be 9000-13000 nanometers, the first spacing may be 0-1300 nanometers, and the first width may be 259-700 nanometers. Alternatively, the pixel spacing is 13000-18000 nanometers, the first spacing is 0-1410 nanometers, and the first width is 277-810 nanometers.

[0194] For example, in a front cross section of the light-emitting device, the product of the cotangent of the acute angle formed when a connecting line connecting the edge of the light-emitting functional layer to the edge of the second end intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is less than or equal to the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end on the substrate. For example, the pixel spacing is 2000-2200 nanometers, and the first spacing is 148-567 nanometers. Alternatively, the pixel spacing is 2200-2500 nanometers, and the first spacing is 166-650 nanometers. Alternatively, the pixel spacing is 2500-3200 nanometers, and the first spacing is 185-740 nanometers. Alternatively, the pixel spacing is 3200-4000 nanometers, and the first spacing is 203-830 nanometers. Alternatively, the pixel spacing is 4000-6000 nanometers and the first spacing is 221-920 nanometers. Alternatively, the pixel spacing is 6000-9000 nanometers and the first spacing is 240-1010 nanometers. Alternatively, the pixel spacing is 9000-13000 nanometers and the first spacing is 259-1150 nanometers. Alternatively, the pixel spacing is 13000-18000 nanometers and the first spacing is 277-1310 nanometers.

[0195] Further illustratively, the distance from the edge of the second end to the edge of the first end in a direction perpendicular to the plane of the substrate is a first height, and the first height is 400-2200 nanometers. Optionally, the pixel spacing is 2000-2200 nanometers and the first height is 400-800 nanometers. Alternatively, the pixel spacing is 2200-2500 nanometers and the first height is 450-850 nanometers. Alternatively, the pixel spacing is 2500-3200 nanometers and the first height is 500-900 nanometers. Alternatively, the pixel spacing is 3200-4000 nanometers and the first height is 550-950 nanometers. Alternatively, the pixel spacing is 4000-6000 nanometers and the first height is 600-1000 nanometers. Alternatively, the pixel spacing is 6,000-9,000 nanometers and the first height is 650-1,100 nanometers, or the pixel spacing is 9,000-13,000 nanometers and the first height is 700-1,200 nanometers, or the pixel spacing is 13,000-18,000 nanometers and the first height is 750-2,200 nanometers.

[0196] For example, in a front cross section of the light-emitting device, the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end portion on the substrate is less than the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end portion intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end portion in a direction perpendicular to the plane of the substrate. In this case, the pixel spacing is 2000-2200 nanometers, the first spacing is 0-415 nanometers, and the first width is 148-417 nanometers. Alternatively, the pixel spacing is 2200-2500 nanometers, the first spacing is 0-446 nanometers, and the first width is 166-450 nanometers. Alternatively, the pixel spacing is 2500-3200 nanometers, the first spacing is 0-484 nanometers, and the first width is 185-490 nanometers. Alternatively, the pixel spacing is 3200-4000 nanometers, the first spacing is 0-522 nanometers, and the first width is 203-530 nanometers. Alternatively, the pixel spacing is 4000-6000 nanometers, the first spacing is 0-560 nanometers, and the first width is 221-570 nanometers. Alternatively, the pixel spacing is 6000-9000 nanometers, the first spacing is 0-598 nanometers, and the first width is 240-610 nanometers. Alternatively, the pixel spacing is 9000-13000 nanometers, the first spacing is 0-685 nanometers, and the first width is 259-700 nanometers. Alternatively, the pixel spacing is 13000-18000 nanometers, the first spacing is 0-790 nanometers, and the first width is 277-810 nanometers.

[0197] Optionally, the display panel may further include at least one optical functional layer, the optical functional layer being located on the side of the light-emitting functional layer away from the substrate and including a plurality of optical functional units located in the first openings, and at least some of the optical functional units have edge portions with gradually reduced thicknesses. In two adjacent first electrodes, the pixel spacing between the edges of the first electrodes in contact with the light-emitting functional layer of the same light-emitting element is 2074-18000 nanometers.

[0198] In a specific embodiment of the fifth aspect of the present disclosure, the display panel may further include a pixel definition layer. The pixel definition layer is located on the first electrode and on the side of the isolation portion facing the substrate, and defines a second opening. The pixel definition layer covers the edge of the first electrode, and the second opening exposes the first electrode. The edge of the second opening overlaps the edge of the first electrode, which contacts the light-emitting functional layer of the same light-emitting element. Here, the distance between the orthogonal projection of the edge of the second end and the orthogonal projection of the edge of the first end on the substrate plane is a first width, and the distance between the edge of the first electrode, which contacts the light-emitting functional layer of the same light-emitting element and the orthogonal projection of the edge of the second end on the substrate plane is a first interval. For example, the pixel interval is 2200-2500 nanometers, the first interval is 0-1050 nanometers, and the first width is 148-450 nanometers. Alternatively, the pixel spacing may be 2500-3200 nanometers, the first spacing may be 0-1090 nanometers, and the first width may be 185-490 nanometers. Alternatively, the pixel spacing may be 3200-4000 nanometers, the first spacing may be 0-1130 nanometers, and the first width may be 203-530 nanometers. Alternatively, the pixel spacing may be 4000-6000 nanometers, the first spacing may be 0-1170 nanometers, and the first width may be 221-570 nanometers. Alternatively, the pixel spacing may be 6000-9000 nanometers, the first spacing may be 0-1210 nanometers, and the first width may be 240-610 nanometers. Alternatively, the pixel spacing may be 9000-13000 nanometers, the first spacing may be 0-1300 nanometers, and the first width may be 259-700 nanometers. Alternatively, the pixel spacing is 13000-18000 nanometers, the first spacing is 0-1410 nanometers, and the first width is 277-810 nanometers.

[0199] Alternatively, in a front cross section of the light-emitting device, the product of the cotangent of the acute angle formed when a connecting line connecting the edge of the light-emitting functional layer to the edge of the second end intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is less than or equal to the distance between the orthogonal projection of the edge of the portion of the first electrode exposed through the second opening and the orthogonal projection of the edge of the second end on the substrate. For example, the pixel spacing is 2200-2500 nanometers, the first spacing is 148-650 nanometers, and the first width is 148-450 nanometers. Or, the pixel spacing is 2500-3200 nanometers, the first spacing is 185-740 nanometers, and the first width is 185-490 nanometers. Alternatively, the pixel spacing is 3200-4000 nanometers, the first spacing is 203-830 nanometers, and the first width is 203-530 nanometers. Alternatively, the pixel spacing is 4000-6000 nanometers, the first spacing is 221-920 nanometers, and the first width is 221-570 nanometers. Alternatively, the pixel spacing is 6000-9000 nanometers, the first spacing is 240-1010 nanometers, and the first width is 240-610 nanometers. Alternatively, the pixel spacing is 9000-13000 nanometers, the first spacing is 259-1150 nanometers, and the first width is 259-700 nanometers. Alternatively, the pixel spacing is 13000-18000 nanometers, the first spacing is 277-1310 nanometers, and the first width is 277-810 nanometers.

[0200] For example, the distance from the edge of the second end to the edge of the first end in a direction perpendicular to the plane of the substrate is the first height, and the first height is 400-2200 nanometers. Alternatively, the pixel spacing is 2200-2500 nanometers and the first height is 400-850 nanometers. Alternatively, the pixel spacing is 2500-3200 nanometers and the first height is 500-900 nanometers. Alternatively, the pixel spacing is 3200-4000 nanometers and the first height is 550-950 nanometers. Alternatively, the pixel spacing is 4000-6000 nanometers and the first height is 600-1000 nanometers. Alternatively, the pixel spacing is 6000-9000 nanometers and the first height is 650-1100 nanometers. Alternatively, the pixel spacing is 9000-13000 nanometers and the first height is 700-1200 nanometers, or the pixel spacing is 13000-18000 nanometers and the first height is 750-2200 nanometers.

[0201] Optionally, in a front cross section of the light-emitting device, the distance between the orthogonal projection of the edge of the first electrode exposed through the second opening and the orthogonal projection of the edge of the second end on the substrate is less than the product of the cotangent of the acute angle formed when a connecting line connecting the edge of the light-emitting functional layer to the edge of the second end intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate. For example, the pixel spacing is 2200-2500 nanometers, the first spacing is 0-446 nanometers, and the first width is 148-450 nanometers. Alternatively, the pixel spacing is 2500-3200 nanometers, the first spacing is 0-484 nanometers, and the first width is 185-490 nanometers. Alternatively, the pixel spacing is 3200-4000 nanometers, the first spacing is 0-522 nanometers, and the first width is 203-530 nanometers. Alternatively, the pixel spacing is 4000-6000 nanometers, the first spacing is 0-560 nanometers, and the first width is 221-570 nanometers. Alternatively, the pixel spacing is 6000-9000 nanometers, the first spacing is 0-598 nanometers, and the first width is 240-610 nanometers. Alternatively, the pixel spacing is 9000-13000 nanometers, the first spacing is 0-685 nanometers, and the first width is 259-700 nanometers. Alternatively, the pixel spacing is 13000-18000 nanometers, the first spacing is 0-790 nanometers, and the first width is 277-810 nanometers.

[0202] In a specific embodiment of the fifth aspect of the present disclosure, the display panel may further include at least one optical functional layer. The optical functional layer is located on a side of the light-emitting functional layer away from the substrate and includes a plurality of optical functional units located within the first openings, and the thickness of at least some of the optical functional units at edge portions of the layer is gradually reduced. In two adjacent first electrodes, the pixel spacing between edges of the first electrodes contacting the light-emitting functional layer of the same light-emitting element is 2274-18000 nanometers.

[0203] A sixth aspect of the present disclosure provides a display panel comprising: a substrate; an isolation structure and a display function layer disposed on the substrate; wherein the isolation structure has a first end and a second end, the second end being disposed on a side of the first end facing away from the substrate; the isolation structure defines a plurality of first openings; the display function layer includes a plurality of light-emitting elements disposed in corresponding first openings, the light-emitting elements comprising a first electrode, a light-emitting function layer, and a second electrode stacked on the substrate, wherein an orthogonal projection of the light-emitting function layer on the substrate is outside the orthogonal projection of the first end and inside the orthogonal projection of the second end; and the pixel density of the display panel is between 90 PPI and 7400 PPI.

[0204] In one specific embodiment of the sixth aspect of the present disclosure, the thickness of the edge portion of at least some layers of the light-emitting device gradually decreases along a direction from the center of the light-emitting device to the corresponding edge.

[0205] In one specific embodiment of the sixth aspect of the present disclosure, the pixel spacing between the edges of the portions of the first electrodes of adjacent light-emitting elements in contact with the corresponding light-emitting functional layers is 2000-18000 nanometers.

[0206] In one specific embodiment of the sixth aspect of the present disclosure, in a front cross section of the light-emitting element, the cross-sectional profile of the isolation portion between two adjacent subpixels is an inverted trapezoid, the bottom edge of the inverted trapezoid is the edge of the second end, and the top edge of the inverted trapezoid is the edge of the first end.

[0207] In another specific embodiment of the sixth aspect of the present disclosure, the isolation portion includes a support portion and a stopper portion stacked on the substrate, the support portion constituting a first end portion and the stopper portion constituting a second end portion. In a front cross section of the light-emitting element, the cross-sectional contours of the support portion and the stopper portion between two adjacent subpixels are both regular trapezoids, the edge of the second end portion is an edge of the surface of the stopper portion facing the substrate, and the edge of the first end portion is an edge of the surface of the support portion facing the substrate.

[0208] In one specific embodiment of the sixth aspect of the present disclosure, a display panel includes a plurality of pixels, each pixel including a plurality of sub-pixels emitting light of different wavelengths, the sub-pixels of the plurality of pixels including a first sub-pixel, a second sub-pixel, and a third sub-pixel, each of which has a different light-emitting element.

[0209] Optionally, the number ratio of the first sub-pixels, the second sub-pixels and the third sub-pixels is 1:1:1.

[0210] Alternatively, in each pixel, the first sub-pixel, the second sub-pixel, and the third sub-pixel are arranged in parallel in a first type pixel arrangement configuration, or in each pixel, the second sub-pixel and the third sub-pixel are arranged in one column / row and in parallel to the first sub-pixel in a second type pixel arrangement configuration.

[0211] In one specific embodiment of the sixth aspect of the present disclosure, the pixel density of the display panel is 90-5200 PPI. Optionally, the pixel spacing is 2000-2200 nanometers, and the pixel density of the display panel is 117-5200 PPI. Alternatively, the pixel spacing is 2200-2500 nanometers, and the pixel density of the display panel is 117-4792 PPI. Alternatively, the pixel spacing is 2500-3200 nanometers, and the pixel density of the display panel is 115-4305 PPI. Alternatively, the pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 115-3479 PPI. Alternatively, the pixel spacing is 4000-6000 nanometers, and the pixel density of the display panel is 111-2854 PPI. Alternatively, the pixel spacing is 6000-9000 nanometers and the pixel density of the display panel is 107-1969 PPI, or the pixel spacing is 9000-13000 nanometers and the pixel density of the display panel is 102-1344 PPI, or the pixel spacing is 13000-18000 nanometers and the pixel density of the display panel is 90-944 PPI.

[0212] In one specific embodiment of the sixth aspect of the present disclosure, the subpixels in the pixel have a first type pixel arrangement, and the pixel density of the display panel is 170-3456 PPI. Optionally, the pixel spacing is 2000-2200 nanometers, and the pixel density of the display panel is 2545-3456 PPI. Alternatively, the pixel spacing is 2200-2500 nanometers, and the pixel density of the display panel is 2171-3143 PPI. Alternatively, the pixel spacing is 2500-3200 nanometers, and the pixel density of the display panel is 1577-2765 PPI. Alternatively, the pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 1063-2160 PPI. Alternatively, the pixel spacing is 4000-6000 nanometers, and the pixel density of the display panel is 529-1728 PPI. Alternatively, the pixel spacing is 6000-9000 nanometers and the pixel density of the display panel is 353-1152 PPI, or the pixel spacing is 9000-13000 nanometers and the pixel density of the display panel is 244-768 PPI, or the pixel spacing is 13000-18000 nanometers and the pixel density of the display panel is 170-531 PPI.

[0213] In one specific embodiment of the sixth aspect of the present disclosure, the subpixels in the pixel have a second type pixel arrangement, and the pixel density of the display panel is 260-5200 PPI. Optionally, the pixel spacing is 2000-2200 nanometers, and the pixel density of the display panel is 3818-5200 PPI. Alternatively, the pixel spacing is 2200-2500 nanometers, and the pixel density of the display panel is 3256-4714 PPI. Alternatively, the pixel spacing is 2500-3200 nanometers, and the pixel density of the display panel is 2366-4147 PPI. Alternatively, the pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 1594-3240 PPI. Alternatively, the pixel spacing is 4000-6000 nanometers, and the pixel density of the display panel is 794-2592 PPI. Alternatively, the pixel spacing is 6000-9000 nanometers and the pixel density of the display panel is 529-1728 PPI, or the pixel spacing is 9000-13000 nanometers and the pixel density of the display panel is 366-1152 PPI, or the pixel spacing is 13000-18000 nanometers and the pixel density of the display panel is 260-797 PPI.

[0214] In a specific embodiment of the sixth aspect of the present disclosure, the display panel further includes at least one optical functional layer, the optical functional layer being located on a side of the light-emitting functional layer away from the substrate, and including a plurality of optical functional units located in the first openings, and the thickness of at least some of the optical functional units at edge portions of the layer is gradually reduced. In two adjacent first electrodes, the pixel spacing between edges of portions of the first electrodes contacting the light-emitting functional layer of the same light-emitting element is 2074-18000 nanometers, and the pixel density of the display panel is 90-5000 PPI.

[0215] In a specific embodiment of the sixth aspect of the present disclosure, the display panel may further include a pixel definition layer. The pixel definition layer is located on the first electrode and on a side of the isolation portion facing the substrate, and defines a second opening. The pixel definition layer covers an edge of the first electrode, and the second opening exposes the first electrode. The edge of the second opening overlaps an edge of the first electrode that contacts the light-emitting functional layer of the same light-emitting element. The orthogonal projection of the edge of the second end on the substrate plane defines a first width, and the orthogonal projection of the edge of the first end on the substrate plane defines a first interval. The subpixels in the pixel have a first type pixel array, and the pixel density of the display panel is 170-3143 PPI. For example, the pixel spacing may be 2200-2500 nanometers and the pixel density of the display panel may be 2171-3143 PPI. Alternatively, the pixel spacing may be 2500-3200 nanometers and the pixel density of the display panel may be 1577-2765 PPI. Alternatively, the pixel spacing may be 3200-4000 nanometers and the pixel density of the display panel may be 1063-2160 PPI. Alternatively, the pixel spacing may be 4000-6000 nanometers and the pixel density of the display panel may be 529-1728 PPI. Alternatively, the pixel spacing may be 6000-9000 nanometers and the pixel density of the display panel may be 353-1152 PPI. Alternatively, the pixel spacing may be 9000-13000 nanometers and the pixel density of the display panel may be 244-768 PPI. Alternatively, the pixel spacing is 13,000-18,000 nanometers, and the pixel density of the display panel is 170-531 PPI.

[0216] In a specific embodiment of the sixth aspect of the present disclosure, the display panel may further include a pixel definition layer. The pixel definition layer is located on the first electrode and on a side of the isolation portion facing the substrate, and defines a second opening. The pixel definition layer covers an edge of the first electrode, and the second opening exposes the first electrode. The edge of the second opening overlaps with an edge of a portion of the first electrode that contacts the light-emitting functional layer of the same light-emitting element. The orthogonal projection of the edge of the second end on the plane of the substrate defines a first width, and the orthogonal projection of the edge of the first end on the plane of the substrate defines a first interval. The subpixels in the pixel have a second type pixel arrangement, and the pixel density of the display panel is 260-4714 PPI. For example, the pixel spacing may be 2200-2500 nanometers and the pixel density of the display panel may be 3256-4714 PPI. Alternatively, the pixel spacing may be 2500-3200 nanometers and the pixel density of the display panel may be 2366-4147 PPI. Alternatively, the pixel spacing may be 3200-4000 nanometers and the pixel density of the display panel may be 1594-3240 PPI. Alternatively, the pixel spacing may be 4000-6000 nanometers and the pixel density of the display panel may be 794-2592 PPI. Alternatively, the pixel spacing may be 6000-9000 nanometers and the pixel density of the display panel may be 529-1728 PPI. Alternatively, the pixel spacing may be 9000-13000 nanometers and the pixel density of the display panel may be 366-1152 PPI. Alternatively, the pixel spacing is 13,000-18,000 nanometers, and the pixel density of the display panel is 260-797 PPI.

[0217] For example, the pixel spacing may be 2000-2200 nanometers, and the average widths of the first, second, and third subpixels may be 450-1326 nanometers. Alternatively, the pixel spacing may be 2200-2500 nanometers, and the average widths of the first, second, and third subpixels may be 494-1700 nanometers. Alternatively, the pixel spacing may be 2500-3200 nanometers, and the average widths of the first, second, and third subpixels may be 563-2868 nanometers. Alternatively, the pixel spacing may be 3200-4000 nanometers, and the average widths of the first, second, and third subpixels may be 720-4767 nanometers. Alternatively, the pixel spacing may be 4000-6000 nanometers, and the average widths of the first, second, and third subpixels may be 900-11995 nanometers. Alternatively, the pixel spacing is 6,000-9,000 nanometers, and the average widths of the first, second, and third subpixels are 1,350-18,008 nanometers. Alternatively, the pixel spacing is 9,000-13,000 nanometers, and the average widths of the first, second, and third subpixels are 2,025-25,699 nanometers. Alternatively, the pixel spacing is 13,000-18,000 nanometers, and the average widths of the first, second, and third subpixels are 4,050-35,846 nanometers.

[0218] Optionally, based on the above data, the aperture ratio of the display panel is 6-60%.

[0219] In a specific embodiment of the sixth aspect of the present disclosure, the display panel may further include at least one optical functional layer. The optical functional layer is located on a side of the light-emitting functional layer away from the substrate and includes a plurality of optical functional units located within the first openings, and at least some of the optical functional units have edge portions with gradually reduced thicknesses. In two adjacent first electrodes, the pixel spacing between edges of the first electrodes contacting the light-emitting functional layer of the same light-emitting element is 2274-18000 nanometers, and the pixel density of the display panel is 90-4560 PPI.

[0220] In one specific embodiment of the sixth aspect of the present disclosure, the display panel includes a plurality of pixels, each pixel including a first subpixel, a second subpixel, and a third subpixel emitting light with progressively smaller wavelengths, the first subpixel, the second subpixel, and the third subpixel each having a different light-emitting element and arranged in a plurality of rows and a plurality of columns, the first subpixel and the third subpixel being arranged in the same row and the same column, and being located in a different row and column from the second subpixel. In the row and column in which the first subpixel and the third subpixel are arranged, the first subpixel and the third subpixel are arranged in a staggered arrangement. The row in which the first subpixel is arranged and the row in which the second subpixel is arranged are staggered. The column in which the first subpixel is arranged and the column in which the second subpixel is arranged are staggered. Each second subpixel is surrounded by two first subpixels and two third subpixels, and the centers of the two first subpixels and the two third subpixels surrounding the same second subpixel are connected to form a rectangle with at least two sides parallel to each other. Optionally, the pixel density of the display panel is 200-7400 PPI. Optionally, the pixel spacing is 2000-2200 nanometers, and the pixel density of the display panel is 249-7400 PPI. Alternatively, the pixel spacing is 2200-2500 nanometers, and the pixel density of the display panel is 248-6778 PPI. Alternatively, the pixel spacing is 2500-3200 nanometers, and the pixel density of the display panel is 245-6088 PPI. Alternatively, the pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 243-4921 PPI. Alternatively, the pixel spacing is 4000-6000 nanometers and the pixel density of the display panel is 236-4036 PPI. Alternatively, the pixel spacing is 6000-9000 nanometers and the pixel density of the display panel is 227-2785 PPI. Alternatively, the pixel spacing is 9000-13000 nanometers and the pixel density of the display panel is 216-1901 PPI. Alternatively, the pixel spacing is 13000-16500 nanometers and the pixel density of the display panel is 208-1335 PPI.Alternatively, the pixel spacing is 16500-18000 nanometers, and the pixel density of the display panel is 200-1060 PPI.

[0221] In one specific embodiment of the sixth aspect of the present disclosure, the geometric center of the surrounded second subpixel does not overlap with the intersection of two diagonals of the corresponding rectangle, or the geometric center of the surrounded second subpixel overlaps with the intersection of two diagonals of the corresponding rectangle. Optionally, the pixel spacing is 2000-2200 nanometers, and the pixel density of the display panel is 1600-3000 PPI. Alternatively, the pixel spacing is 2200-2500 nanometers, and the pixel density of the display panel is 1400-2700 PPI. Alternatively, the pixel spacing is 2500-3200 nanometers, and the pixel density of the display panel is 1200-2400 PPI. Alternatively, the pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 1000-2100 PPI. Alternatively, the pixel spacing is 4000-6000 nanometers and the pixel density of the display panel is 800-1800 PPI. Alternatively, the pixel spacing is 6000-9000 nanometers and the pixel density of the display panel is 600-1500 PPI. Alternatively, the pixel spacing is 9000-13000 nanometers and the pixel density of the display panel is 400-1200 PPI. Alternatively, the pixel spacing is 13000-16500 nanometers and the pixel density of the display panel is 300-900 PPI. Alternatively, the pixel spacing is 16500-18000 nanometers and the pixel density of the display panel is 200-800 PPI.

[0222] A seventh aspect of the present disclosure provides a display device, which may include a display panel according to any one of the specific embodiments of the first to sixth aspects described above. [Brief explanation of the drawings]

[0223] [Figure 1] 1 is a schematic plan view of a display panel according to an embodiment of the present disclosure; [Figure 2]2 is a partially enlarged schematic diagram of an S region of the display panel shown in FIG. 1. [Figure 3] 1 and 2 in a sub-pixel area according to one design of the display panel shown in FIG. 2, which may correspond to the M1-N1 cross section in FIG. [Figure 4] 1 and 2 according to another design of the display panel shown in FIG. 2, in a region where one subpixel is located, and may correspond to the M1-N1 cross section in FIG. [Figure 5] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 6] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 7] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 8A] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 8B] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 9] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 10] 10A to 10C are process diagrams illustrating the manufacturing process of the display panel shown in FIG. [Figure 11] 10A to 10C are process diagrams illustrating the manufacturing process of the display panel shown in FIG. [Figure 12] 10A to 10C are process diagrams illustrating the manufacturing process of the display panel shown in FIG. [Figure 13] 10A to 10C are process diagrams illustrating the manufacturing process of the display panel shown in FIG. [Figure 14] 1 is an enlarged schematic diagram of a local structure of a display panel according to an embodiment of the present disclosure, the cross-sectional schematic diagram of which taken along M2-N2 may be FIG. 3 or FIG. 4. [Figure 15]3 or 4 is an enlarged schematic diagram of a local structure of a display panel according to an embodiment of the present disclosure, the cross-sectional schematic diagram of which is taken along M3-N3. [Figure 16] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 17] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 18] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 19] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 20] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 21A] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 21B] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 21C] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 22] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 23A] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 23B] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 23C] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 24] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 25]2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 26A] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 26B] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 27] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 28A] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 28B] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 29] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 30] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 31] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 32] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 33] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 34A] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 34B] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 35A] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 35B] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 36] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 37] 2 is an enlarged view of a local structure of one pixel of a display panel according to an embodiment of the present disclosure. [Figure 38] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 39] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 40] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 41] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 42] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 43] 2 is a cross-sectional view of a local structure in a local region of a display panel according to an embodiment of the present disclosure. [Figure 44] 1 is a schematic diagram illustrating the relationship between pixel density and pixel spacing in a display panel having one type of pixel arrangement according to an embodiment of the present disclosure. [Figure 45] FIG. 10 is a schematic diagram illustrating the relationship between pixel density and pixel spacing in a display panel having another type of pixel arrangement according to an embodiment of the present disclosure. [Figure 46] FIG. 10 is an enlarged view of a local structure of another type of pixel of a display panel according to an embodiment of the present disclosure, the schematic view of which taken along M4-N4 may be that of FIG. 3 or FIG. 4. [Figure 47] FIG. 47 is a schematic diagram showing the relationship between pixel density and pixel spacing in a display panel having the pixel arrangement shown in FIG. 46. [Figure 48] 1 is a cross-sectional view of a substrate in a display panel according to an embodiment of the present disclosure, showing one type of cross-sectional view of a first type thin film transistor included in a pixel driving circuit. [Figure 49]FIG. 2 is a cross-sectional view of a substrate in a display panel according to an embodiment of the present disclosure, showing a cross-sectional view of a first-type thin film transistor and a second-type thin film transistor included in a pixel driving circuit. [Figure 50] FIG. 2 is a cross-sectional view of a substrate in a display panel according to an embodiment of the present disclosure, showing another type of cross-sectional view of a first type thin film transistor included in a pixel driving circuit. [Figure 51] 2 is a partially enlarged schematic diagram of an S region of the display panel shown in FIG. 1 in one type of pixel arrangement form. [Figure 52] 52 is a cross-sectional view taken along line M5-N5 of the display panel shown in FIG. 51. [Figure 53] 1. FIG. 4 is a partially enlarged schematic diagram of an S region of the display panel shown in FIG. 1 in accordance with another type of pixel arrangement. [Figure 54] FIG. 54 is a cross-sectional view of one structural design of the display panel shown in FIG. 53 taken along M6-N6. [Figure 55] FIG. 54 is a cross-sectional view of another structural design of the display panel shown in FIG. 53 taken along M6-N6. [Explanation of symbols]

[0224] 100...substrate, 200...light-emitting element, 210...first electrode, 220...light-emitting functional layer, 221...first functional layer, 222...light-emitting layer, 223...second functional layer, 202...effective functional area, 230...second electrode, 300...isolation structure, 301...first opening, 302...second opening, 310...first end (support portion), 311...sub-support portion, 320...second end (stop portion), 330...pixel definition layer, 340 ...connecting portion, 400...color conversion layer, 410...color conversion unit, 510...first sealing layer, 520...second sealing layer, 530...third sealing layer, 500...photoresist pattern, 600...filling layer, 710...light extraction layer, 711...light extraction unit, 720...light control layer, 721...light control unit, 810...blocking portion, 820...filter unit, 910...protective layer, 911...protective unit DETAILED DESCRIPTION OF THE INVENTION

[0225] Hereinafter, the technical solutions according to the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, and are not all of the embodiments. Other embodiments that can be obtained by a person skilled in the art based on the embodiments of the present disclosure without any creative work are all within the scope of protection of the present disclosure.

[0226] In display products, some functional layers in light-emitting devices are formed by deposition. However, the functional layers in each light-emitting device are different in type, and light-emitting devices emitting different light rays use different materials for some of their functional layers (e.g., light-emitting layers). Therefore, when depositing these functional layers using a mask (e.g., a fine metal mask, FMM, or fine metal mask), multiple alignments are required. To address the issue of misalignment caused by alignment accuracy errors, sufficient space (a safety margin related to alignment errors) must be provided between different light-emitting devices to ensure that the actual light-emitting area of ​​the light-emitting device overlaps the designed position (design area) to a certain extent. However, this approach compresses the designed area of ​​the light-emitting device's light-emitting area, which not only limits the light-emitting area of ​​the light-emitting device but also restricts the array density of light-emitting devices (corresponding to subpixels), thereby preventing further improvements in the pixel density of display panels.

[0227] In the present disclosure, isolation structures are provided in the gaps between light-emitting elements to isolate the functional layers of adjacent light-emitting elements. In this manner, the deposition process for multiple functional layers can be performed over the entire surface of the display panel, eliminating the need to use a mask to deposit functional layers in the areas where the light-emitting elements are located. Therefore, the deposition process using isolation structures eliminates the need to consider alignment accuracy during deposition, allowing for a smaller spacing between light-emitting elements, thereby improving pixel density (the principles of which can be seen in the relevant explanations of the embodiments shown in Figures 10 to 13 below).

[0228] In the above design, the isolation structure surrounds the light-emitting element. Meanwhile, during the deposition process, the deposition source for depositing the functional layers has a deposition angle, so the height and width of the isolation structure affect the distribution of the deposited layers. The luminous efficiency of the light-emitting region of the light-emitting element is related to the deposition quality of the functional layers. Because the deposition angle and the isolation structure block the deposition material during deposition, the thickness of the functional layers (e.g., the first functional layer, the light-emitting layer, the second light-emitting layer, and the second electrode) gradually thins at their edge regions, affecting the luminous efficiency. Therefore, by distributing the functional layer with a uniform thickness as much as possible within the light-emitting region, high luminous efficiency can be ensured at any position in the light-emitting region of the light-emitting element, and light emission throughout the entire light-emitting region can be made uniform. Therefore, in practice, the uniformly thick functional layer portion (the effective functional region, described below) limits the design boundary of the light-emitting region (which may not overlap). That is, the boundary of the effective functional region can be obtained first, and then the boundary of the main light-emitting region (which has uniform luminous efficiency and can emit high-quality light) of the light-emitting region can be determined based on that.

[0229] Note that the range of the effective functional area is limited by the light-emitting functional layer, but the light-emitting area and main light-emitting area of ​​the display element are limited by both the light-emitting functional layer and the first electrode. For example, in the case where the effective functional area is defined by the light-emitting functional layer, the area of ​​the light-emitting functional layer where a part of the thickness is uniform is the effective functional area, the area where the first electrode and the light-emitting functional layer contact in the light-emitting element corresponds to the light-emitting area of ​​the light-emitting element, and the area where the first electrode and the effective functional area overlap and contact each other in the light-emitting element is the main light-emitting area of ​​the light-emitting element (this area has uniform light emission).

[0230] When designing the dimensions of the light-emitting element and the isolation structure, how to plan parameters such as the height and width of the isolation structure based on the deposition angle, distribution position of the functional layer, etc. is an important issue that needs to be considered in the structural design of a display panel in order to ensure that the light-emitting element has good luminous efficiency while reducing the spacing between the light-emitting elements to improve PPI.

[0231] In addition, due to the existence of display panels with different display modes and specific functional needs in the display panels, the isolation structure may be modified or other functional structures (such as color conversion layers in the embodiments described below) may be provided based on the isolation structure. In such cases, when using the isolation structure to form these functional structures, it is necessary to adjust the height, parameters, etc. of the isolation structure in order to reduce manufacturing costs, avoid related errors, and improve the pixel density of the product.

[0232] An embodiment of the present disclosure provides a display panel that solves at least some of the above-mentioned problems. The display panel includes a substrate, a display functional layer, and an isolation structure. The display functional layer includes a plurality of light-emitting elements, each of which includes a first electrode, a light-emitting functional layer, and a second electrode, which are sequentially stacked on the substrate. The light-emitting functional layer includes an effective functional area, and a portion of the first functional layer located within the effective functional area has a uniform layer thickness. The isolation structure includes an isolation portion located on the substrate and surrounding the light-emitting functional layer. The isolation portion has a first end facing the substrate and a second end away from the substrate. An orthographic projection of the effective functional area on the substrate is outside an orthographic projection of the second end of the isolation structure on the substrate, and an orthographic projection of an edge of the first functional layer on the substrate is outside an orthographic projection of the first end on the substrate and inside an orthographic projection of the second end on the substrate. In a cross section perpendicular to the substrate, on one side of the isolation structure, the acute angle formed by the line determined by the edge of the first functional layer and the edge of the second end and the plane of the substrate is a second tilt angle, the tangent value of the acute angle formed by the line determined by the edge of the effective functional area and the edge of the second end and the plane of the substrate is less than the tangent value of the second tilt angle, and the ratio of the height difference between the edge of the first end and the edge of the second end in a direction perpendicular to the plane of the substrate to the distance between the edge of the first end and the edge of the second end in a direction parallel to the plane of the substrate is less than the tangent value of the second tilt angle.

[0233] According to specific pixel density design requirements, the sum of the width of the main light-emitting region of the light-emitting element (abbreviated as sub-pixel width) and the distance between adjacent main light-emitting regions can be directly calculated. Here, the width of the main light-emitting region can be determined based on the effective functional area. That is, if the selectable range of the boundary position of the effective functional area can be determined, the selectable range of the boundary position of the main light-emitting region can be estimated. According to the design of the above-described embodiment of the present disclosure, the first deposition angle is determined based on the boundary of the effective functional area and the height of the second end (its edge). Furthermore, the extension position of the edge of the first functional layer is determined based on the first deposition angle and the height of the second end. Based on the principle that the first functional layer is isolated by the isolation portion, the distance between the extension position and the second end can be estimated, and thus the selectable range of the edge position of the second end can be estimated. In this way, a relationship can be established between parameters such as the edge of the effective functional area, the edge of the first functional layer, the width (edge ​​position of the first end and the second end) and height (height difference between the edges of the first end and the second end) of the isolation structure, and the deposition angle. Furthermore, based on the selectable range of the width dimension of the first end portion (with a lower limit), the selectable width range of the effective functional area can be inversely estimated, and the selectable width range (including the maximum width) of the main light-emitting area can be further estimated, thereby obtaining the maximum design width of the main light-emitting area according to a specific pixel density design requirement, and ensuring the design area of ​​the main light-emitting area in the actual process (the width of the area may be equal to or slightly smaller than the maximum design width).

[0234] In addition, since alignment accuracy may need to be considered when manufacturing the isolation structure, the design width of the main light-emitting region may be set slightly smaller than the maximum design width calculated by the above method, thereby providing a safety margin for alignment accuracy errors of the isolation structure. Also, as can be inferred from the above design, the boundary of the effective functional region is determined by the design parameters of the isolation structure and the deposition angle, and when the position of the isolation structure is constant, the position of the boundary is not affected by alignment accuracy during deposition.

[0235] The structure of a display panel according to at least one embodiment of the present disclosure will be described in detail below with reference to the drawings. In these drawings, a spatial Cartesian coordinate system is constructed based on the substrate to more intuitively show the positional relationship of related structures in the display panel. In the spatial Cartesian coordinate system, the X and Y axes are parallel to the plane of the substrate, and the Z axis is perpendicular to the plane of the substrate. The orientations of "up" and "down" can be determined based on the substrate. For example, the "up" direction is represented by the direction facing the display side of the substrate (e.g., the side of the light-emitting element away from the substrate), while the "down" direction is represented by the direction away from the display side of the substrate. For example, when a first object is located between a second object and the substrate, the second object is located above the first object, and the first object is located below the second object.

[0236] As shown in Figures 1 to 3, the planar area of ​​the display panel 10 can be divided into a display area 11 and a frame area 12 surrounding the display area 11. Subpixels (also referred to as subpixels, etc.), such as R, G, and B, can be arranged in the display area 11, and the actual structure of the subpixels can be light-emitting elements. Adjacent subpixels emitting light of different colors can form a pixel P (also referred to as a pixel unit, a large pixel, etc.), and the arrangement density of the pixels P in the display area 11 represents the pixel density. Note that in some embodiments of the present disclosure, some wiring in the frame area 12 can be arranged within the display area 11, and therefore the frame area 12 can be designed as a one-sided frame.

[0237] At least within the display area 11, the physical structure of the display panel 10 may include a substrate 100, a display functional layer and an isolation structure 300 located on the substrate 100. The display functional layer includes a plurality of light-emitting elements 200. The light-emitting elements 200 include a first electrode 210, a light-emitting functional layer 220, and a second electrode 230 stacked on the substrate 100, the light-emitting functional layer 220 including an effective functional area 202, and the light-emitting functional layer 220 including a first functional layer 221.

[0238] For example, the light-emitting functional layer may further include a light-emitting layer 222 and a second functional layer 223. The first functional layer 221, the light-emitting layer 222, and the second functional layer 223 are stacked in this order on the first electrode 210. The first functional layer 221 may include a hole injection layer, a hole transport layer, an electron blocking layer, etc. The second functional layer 223 may include an electron injection layer, an electron transport layer, a hole blocking layer, etc.

[0239] In the embodiments of the present disclosure, when the influence of the layer thickness of the second electrode 230 on the luminous efficiency and luminous uniformity of the light-emitting layer is not taken into consideration, the "effective functional region" refers to a region in which at least some of the layers of the light-emitting functional layer have a uniform thickness, and the type of the "at least some layers" can be selected according to actual process needs. For example, the "at least some layers" can be any one or a combination of the first functional layer 221, the light-emitting layer 222, and the second functional layer 223. Specifically, the thickness of only the first functional layer 221 in the effective functional region can be uniform, or the thicknesses of the first functional layer 221 and the light-emitting layer 222 in the effective functional region can be uniform, or the thicknesses of the first functional layer 221, the light-emitting layer 222, and the second functional layer 223 can all be uniform in the effective functional region.

[0240] For example, in at least one embodiment of the present disclosure, the first electrode can be provided as an anode and the second electrode can be provided as a cathode.

[0241] The isolation structure 300 includes an isolation portion located on the substrate 100, the isolation portion defining a plurality of first openings 301, the light-emitting functional layer 220 and the second electrode 230 located within the first openings 301, the isolation portion including a conductive portion, and the second electrode 230 connected to the conductive portion of the isolation portion. Thus, the overall structure of the isolation portion has a grid-like shape, and the first openings 301 are the meshes of the grid. The first openings 301 are spaces surrounded by the isolation portions, and the edges of the first openings 301 can be determined according to specified height positions (different distances to the substrate 100). For example, if the width of the first end 310 is smaller than the width of the second end 320, the width of the opening defined by the edge of the first end 310 of the first opening 301 is larger than the width of the opening defined by the edge of the second end 320.

[0242] The isolation portion has an overall shape that is wide at the top and narrow at the bottom, and therefore, due to the shielding of the isolation structure during deposition, the first functional layer 221 is not continuous with other portions formed on the isolation portion. For example, the orthogonal projection of the first end 310 of the isolation portion facing the substrate on the substrate 100 is located within the orthogonal projection of the second end 320 of the isolation portion away from the substrate 100 on the substrate 100. Thus, the orthogonal projection of the edge of the first functional layer 221 on the substrate 100 is outside the orthogonal projection of the first end 310 on the substrate 100 and inside the orthogonal projection of the second end 320 on the substrate 100. In other words, the first functional layer 221 formed by deposition does not connect to the conductive portion of the isolation structure 300 (e.g., the first end 310). In a cross section perpendicular to the substrate 100, on the same side of the isolation structure, the acute angle formed by a line P1 defined by the edge of the second end 320 and the edge of the first functional layer 221 and the plane of the substrate 100 (parallel to the line P0) is the second tilt angle Θ2. When the boundary of the effective functional area 202 is defined using the edge of the uniform thickness portion of the first functional layer 221, the acute angle formed by the line P2 defined by the edge of the uniform thickness portion of the first functional layer 221 and the edge of the second end 320 and the line P0 is equal to the second tilt angle Θ2. Correspondingly, the acute angle formed by the line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 is also the second tilt angle Θ2.

[0243] The plane on which the substrate is located is a virtual plane corresponding to the surface of the planar structure on which the substrate is held. In the drawings of this specification, some angles are angles of the same magnitude that are represented by planes or parallel planes or parallel straight lines. For example, the second tilt angle is represented by a straight line P0 corresponding to the plane parallel to the plane on which the substrate is located.

[0244] The tangent value of the acute angle formed by the line defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 is less than or equal to the tangent value of the second tilt angle Θ2. This relationship ensures that the layer thickness of the first functional layer 221 in the effective functional area 202 is uniform. Here, the "equal" relationship corresponds to the edge of the first functional layer 221 defining the boundary of the effective functional area 202.

[0245] For example, the ratio of the height difference h1 between the edge of the first end 310 and the edge of the second end 320 in a direction perpendicular to the plane of the substrate 100 to the first width L2 of the edge of the first end 310 and the edge of the second end 320 in a direction parallel to the plane of the substrate is less than or equal to the tangent value tan Θ2 of the second tilt angle Θ2. That is, L2≧h1 / tan Θ2. Therefore, in an actual process, the isolation effect of the isolation structure on the first functional layer 221 can be guaranteed, and the layer thickness of the first functional layer 221 in the effective functional area 202 can be ensured to be uniform. For example, if the boundary of the effective functional area 202 is defined by the edge of the portion of the first functional layer 221 where the layer thickness is uniform, if L2=h1 / tan Θ2, the boundary of the first functional layer 221 extends exactly to the edge of the first end 310, where the layer thickness gradually decreases and the layer thickness of the first functional layer 221 becomes very close to zero (very high electrical resistance). If L2>h1 / tan Θ2, the first functional layer 221 and the first end 310 do not contact each other and a gap exists between them, and the isolation structure correspondingly completely isolates the first functional layer 221.

[0246] For example, the second tilt angle Θ2 is actually the deposition angle when the first functional layer 221 is deposited, and since the first functional layer 221 needs to be spaced apart from the isolation structure, it needs to be designed to be relatively small. Furthermore, the larger the deposition angle, the greater the distance between the edge of the first functional layer 221 and the isolation structure. Therefore, the first width L2 of the edge of the first end 310 and the edge of the second end 320 in the lateral direction (e.g., the direction parallel to the X-axis) needs to be designed to be relatively small, thereby reducing the spacing between the light emitting devices 200. Therefore, in some embodiments, the second tilt angle Θ2 can correspond to as large a deposition angle as possible of the deposition source.

[0247] The "deposition angle" refers to the acute angle formed by the line corresponding to the boundary of the radiation range of the deposition source material and the plane of the substrate. In other words, when deposition is performed at a certain deposition angle, the deposition material cannot reach beyond the boundary corresponding to the deposition angle because it is blocked by the isolation structure.

[0248] In the embodiment of the present disclosure, the orthogonal projection of the effective functional area 202 on the substrate 100 is outside the orthogonal projection of the second end 320 on the substrate 100. The acute angle formed by the line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (parallel to the line P0) is less than or equal to the second tilt angle Θ2. Figure 3 shows the case where the two are equal, i.e., the height difference between the outer edge of the first end 310 and the outer edge of the second end 320 is h1, the lateral distance between the edge of the effective functional area 202 and the edge of the second end 320 (referred to here as the second distance based on the form of the embodiment described later) is L1, and assuming that lines P1 and P2 determine the distribution boundary of the deposition material formed by being blocked by the second end 320 when the deposition source is at a different position, when L1 = h1 / tan Θ1 is satisfied, the included angle between P3 and P0 is equal to Θ1.

[0249] The outer edge of the first end 310 may also be referred to as the edge of the first end 310, and the outer edge of the second end 320 may also be referred to as the edge of the second end 320.

[0250] Note that "H" is the distance in the Z-axis direction between the outer edge of the second end 320 and the boundary of the uniform-thickness portion of the target layer. For example, in the structure shown in FIG. 3 (e.g., the pixel definition layer in the embodiment described below), if the thickness of the first electrode 210 is ignored, the bottom of the isolation structure and the outer edge of the first functional layer 221 are in approximately the same layer, and therefore the above formula L1=h1 / tan Θ1 may be replaced with L1=H / tan Θ1. When the thickness of the first electrode 210 is taken into account, the thickness of the first electrode 210 needs to be subtracted from "H" in the above formula L1=H / tan Θ1.

[0251] Note that when L1=h1 / tan Θ1, even if the deposition source directly faces the isolation structure 300 when depositing the first functional layer 221 (the deposition angle and deposition boundary are determined by line P2), the deposited material can enter the effective functional region 202. Therefore, the first functional layer 221 can be deposited at any position within the effective functional region 202, resulting in a uniform layer thickness. In this case, the width of the second gap L1 is the minimum design width that can ensure a uniform layer thickness of the first functional layer 221 in the effective functional region 202. Designing the gap between the light-emitting elements 200 based on this minimum design width allows the gap between the subpixels to be reduced.

[0252] In the embodiments of the present disclosure, the "uniform" deposition of a layer in a certain region is a macroscopic expression. Specifically, a portion of the lower surface and a portion of the upper surface of the corresponding layer are both parallel to the plane of the substrate, and therefore the layer thickness in these regions is consistent. Alternatively, a layer is deposited in a region parallel to the plane of the substrate, and no other structures obstruct the deposition source during the deposition process, and therefore the layer thickness in this region is consistent. Unless otherwise specified, the thickness of a certain layer referred to refers to the thickness of the layer in the corresponding region.

[0253] On the other hand, in the case of the first functional layer, if the boundary of the effective functional area is defined as the boundary where the uniformity of the layer thickness of the first functional layer begins to change, in the effective functional area, the deposition of the first functional layer is not blocked by the isolation portions from start to finish, whereas outside the effective functional area, the deposition of the first functional layer is blocked by the isolation portions for a certain period of time (as the relative positions of the deposition source and the display panel change), and the farther from the effective functional area, the longer the period during which the first functional layer is blocked during deposition, and therefore the smaller the layer thickness that is ultimately deposited. Thus, the "uniformity" of the layer referred to in the embodiments of the present disclosure ignores microscopic non-uniformities in the deposition of the layer itself, which are limited by the deposition process conditions and generally exist throughout the layer.

[0254] Furthermore, in the above-mentioned examples, if only the uniformity of the thickness of the first functional layer within the effective functional area is considered, the edge of the part of the first functional layer where the layer thickness is uniform can be considered as the boundary of the effective functional area, and correspondingly, the maximum boundary of the main light-emitting area also becomes the edge of the part of the first functional layer where the layer thickness is uniform.

[0255] In the embodiments of the present disclosure, the installation form of the isolation structure is not limited as long as the isolation portion has a wide upper portion and a narrow lower portion. Hereinafter, several installation forms of the isolation structure will be briefly described using examples.

[0256] In some embodiments of the present disclosure, the isolation structure is an integrated structure, as shown in FIG. 3 . That is, the integrated structure may be an independent layer without a physical boundary, and at least the first end 310 and the second end 320 of the isolation structure are two parts of the integrated structure. For example, the cross-sectional shape of the isolation portion between two adjacent subpixels along a direction perpendicular to the substrate 100 is an inverted trapezoid, with the apex of the inverted trapezoid facing the substrate 100, i.e., the apex of the inverted trapezoid is between the substrate 100 and the base of the inverted trapezoid. Thus, the edge of the first end 310 facing the substrate 100 is the edge of the first end 310, and the edge of the second end 320 facing away from the substrate 100 is the edge of the second end 320. In this design, the sidewall of the isolation structure is an inscribed structure, thereby improving the shielding effect of the isolation structure.

[0257] 4 , the isolation portion includes a support portion and a stopper portion stacked in this order on the substrate 100, with the support portion constituting the first end 310 and the stopper portion constituting the second end 320. For example, the cross-sectional shape of the portion of the support portion 310 between two adjacent subpixels along the direction perpendicular to the substrate 100 is a regular trapezoid, and the stopper portion 320 is located at the top edge of the support portion 310. In this case, the edge of the surface of the support portion 310 facing the substrate 100 is the edge of the first end 310. In this way, the evaporation material of the second electrode 230 is more likely to be deposited on the sidewall of the support portion 310, thereby improving the yield rate of the overlapping bonding of the second electrode 230 and the support portion 310. For example, further, along a direction perpendicular to the substrate 100, the cross-sectional shape of the portion of the stopper 320 between two adjacent subpixels is a regular trapezoid, and the edge of the surface of the stopper 320 facing the support portion 310 is the edge of the second end 320.

[0258] In the embodiments of the present disclosure, the regular trapezoids and inverted trapezoids referred to may be strictly regular trapezoids and inverted trapezoids, or may be roughly shaped. For example, the top and bottom edges are parallel or conformal (one side surface rises and falls roughly simultaneously with the other side surface), the dimension of the bottom edge is larger than the dimension of the top edge, and the edge shapes on both sides are roughly axisymmetric. For example, the shapes of the top, bottom, and side edges are not limited to flat surfaces.

[0259] In the embodiment of the present disclosure, the deposition angle during deposition of the second electrode 230 is typically smaller than the second tilt angle Θ2 described above, thereby ensuring that the second electrode 230 and the first end 310 are overlapped and joined. In this case, to ensure that the layer thickness of the second electrode 230 in the effective functional area 202 is uniform, it is necessary to limit the minimum dimension of the second distance L1.

[0260] 5, in a cross section perpendicular to the substrate 100, on the same side of the isolation structure 300, the acute angle formed by a line P4 defined by the edge of the second electrode 230 and the edge of the second end 320 and the plane of the substrate 100 is a first tilt angle Θ1, which is smaller than the second tilt angle Θ2. The acute angle formed by a line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., a line P0 included therein) is smaller than the first tilt angle Θ1. In this case, the acute angle formed by P3 and P0 is already smaller than the second tilt angle Θ2. That is, when L2 in FIG. 5 and L2 in FIG. 4 are approximately equal, the second distance L1 in FIG. 5 is larger than the second distance L1 in FIG. 4.

[0261] The first tilt angle Θ1 is actually the deposition angle during deposition of the second electrode 230. The smaller the deposition angle, the larger the area of ​​the edge of the second electrode 230 that contacts the isolation structure. Correspondingly, the first width L2 of the edge of the first end 310 and the edge of the second end 320 in the lateral direction (e.g., parallel to the X-axis) may be relatively small, thereby reducing the spacing between adjacent light-emitting elements 200. Therefore, in some embodiments, the first tilt angle Θ1 may correspond to the minimum deposition angle of the deposition source. The included angle between line P5 and line P0 is the first tilt angle Θ1. That is, the position where line P5 intersects with the second electrode 230 is the boundary position at which the thickness of the second electrode 230 becomes non-uniform. When the acute angle formed by line P3 and line P0 is equal to or smaller than the first tilt angle Θ1, the boundary position where the thickness becomes non-uniform overlaps the intersection of line P3 and second electrode 230, or is between the intersection of line P3 and second electrode 230 and the isolation structure. This ensures that the layer thicknesses of all layers in the second electrode 230 and the light-emitting functional layer 220 in the effective functional region 202 are uniformly distributed, while ensuring the minimum designable dimension of the second distance L1 in the lateral direction between the edge of the effective functional region 202 and the edge of the second end 320. This ensures the minimum distance L between adjacent effective functional regions 202, maintaining the first functional layer 221 isolated by the isolation structure 300 and improving pixel density.

[0262] In some embodiments of the present disclosure, when the contact area between the light-emitting functional layer and the anode is not taken into consideration (e.g., the dimensions of the anode are designed to have a sufficient contact area with the light-emitting functional layer), the range of the effective functional region can be limited based only on the boundary of the uniformly thick portion of the relevant layer (e.g., the first functional layer or all layers) in the light-emitting functional layer. The second electrode only needs to provide carriers (e.g., electrons) to the light-emitting functional layer, and if the second electrode has a sufficient thickness, even if the thickness of the second electrode is non-uniform, the non-uniform portion of the thickness may be considered not to affect the distribution uniformity of the light extraction efficiency of the light-emitting device.

[0263] In some other embodiments of the present disclosure, the second electrode is limited in thickness due to the need for improved light transmittance. Therefore, in some embodiments, the thickness of the second electrode in the primary light-emitting region must be as uniform as possible. For example, to uniformize the layer thickness of the second electrode in the portion overlapping the effective functional region, the boundary of the effective functional region can be further defined by the edge of the second electrode where the layer thickness is uniform. In this case, the area of ​​the effective functional region is smaller than the area of ​​the portion of the light-emitting functional layer where the layer thickness is uniform (e.g., the area of ​​the portion of the light-emitting layer where the layer thickness is uniform and the area of ​​the portion of the first functional layer where the layer thickness is uniform). In this case, both the light-emitting functional layer and the second electrode have uniform thicknesses in the effective functional region. Correspondingly, the maximum boundary of the primary light-emitting region is also the edge of the portion of the second electrode where the layer thickness is uniform.

[0264] In at least one embodiment of the present disclosure, the deposition angles of layers (e.g., the light-emitting layer, the second functional layer 223, etc.) located on the first functional layer 221 are typically set to be equal to or less than the deposition angle of the first functional layer 221. As a result, these layers cover the first functional layer 221, preventing the first functional layer 221 from directly connecting to the second electrode 230. In this case, for example, if the deposition angle corresponding to the light-emitting layer is smaller than the deposition angle of the first functional layer 221, and the width of the second interval L1 can ensure that the layer thickness of the light-emitting layer in the effective functional region 202 is uniform, the first functional layer 221 can have a uniform layer thickness in the effective functional region 202. Furthermore, for example, if the inclination angle corresponding to the edge of the second functional layer 223 is smaller than the inclination angle corresponding to the edge of other layers in the light-emitting functional layer, if the width of the second interval L1 can ensure that the layer thickness of the second functional layer 223 in the effective functional region 202 is uniform, other layers such as the first functional layer 221 and the light-emitting layer can have uniform layer thicknesses in the effective functional region 202.

[0265] In the embodiment of the present disclosure, the inclination angle corresponding to the edge of the layer is an acute angle formed by the connecting line between the edge of the layer and the edge of the second end portion intersecting with the plane of the substrate.

[0266] Furthermore, since the light-emitting layer is the main layer for exciting light in the light-emitting functional layer and is the basic functional layer of the light-emitting functional layer, the film quality of the light-emitting layer has a greater impact on the light-emitting efficiency of the light-emitting device than other layers. Therefore, in actual processes, it is necessary to ensure that the layer thickness of at least the effective functional area of ​​the light-emitting layer is uniform. That is, the edge of the part of the light-emitting layer where the layer thickness is uniform can be used as the boundary of the effective functional area. In this case, the area of ​​the effective functional area should not be larger than the area of ​​the part of the first functional layer 221 where the layer thickness is uniform.

[0267] Note that, when the deposition angle corresponding to the light-emitting layer is equal to or smaller than the deposition angle of the first functional layer 221, the minimum limit (minimum area) of the boundary of the light-emitting layer is the boundary location of the first functional layer 221. That is, the boundary corresponding to the maximum area of ​​the effective functional area can still be the boundary of the part of the first functional area 221 where the layer thickness is uniform. Therefore, at least when calculating the limit value of pixel density, the position of the effective functional area can still be determined using the position of the edge of the part of the first functional layer 221 where the layer thickness is uniform.

[0268] In the embodiments of the present disclosure, the boundary of the portion of the light-emitting layer where the layer thickness is uniform can be the boundary of the main light-emitting region of the light-emitting device. For example, when the deposition angle corresponding to the light-emitting layer is equal to the deposition angle of the first functional layer 221, the boundary of the main light-emitting region, the boundary of the effective functional region, the boundary of the portion of the light-emitting layer where the layer thickness is uniform, and the boundary of the portion of the first functional layer 221 where the layer thickness is uniform overlap. Alternatively, when the deposition angle corresponding to the light-emitting layer is smaller than the deposition angle of the first functional layer 221, the boundary of the portion of the light-emitting layer where the layer thickness is uniform is the boundary of the main light-emitting region of the light-emitting device, and the boundary of the portion of the first functional layer 221 where the layer thickness is uniform is the boundary of the effective functional region.

[0269] In at least one embodiment of the present disclosure, the light-emitting layer 222, the second functional layer 223, etc., do not need to be in good contact with the isolation structure, or contact with the isolation structure should be avoided. Therefore, the deposition angles of the light-emitting layer 222, the second functional layer 223, etc. are generally greater than the deposition angle of the second electrode 230. In this case, as long as the width of the second gap L1 can ensure that the layer thickness of the second electrode 230 in the effective functional area 202 is uniform, the functional layers, such as the light-emitting layer 222 and the second functional layer 223, between the first functional layer 221 and the second electrode 230 can all have uniform layer thicknesses in the effective functional area 202. In other words, when the boundary of the effective functional area is defined using the edge of the part of the second electrode 230 with a uniform layer thickness, the layer thickness of each layer in the light-emitting functional layer in the effective functional area is uniform.

[0270] 5 , in a cross section perpendicular to the substrate 100, the acute angle formed by the edge of the surface of the first end 310 facing the substrate 100 and the edge of the second end 320 on the same side of the isolation structure 300, and the plane of the substrate 100 (or line P0) is greater than or equal to the first tilt angle Θ1 and less than or equal to the second tilt angle Θ2. That is, h1 / tan Θ1≦L2≦h1 / tan Θ2. In this manner, the minimum designable dimension of the first width L2 in the lateral direction between the edge of the first end 310 and the edge of the second end 320 can be maximized, thereby obtaining the minimum spacing between adjacent effective functional areas 202, thereby maintaining the isolation of the first functional layers 221 by the isolation structure 300 and further improving the array density of light-emitting elements (corresponding to pixel density).

[0271] 5, the acute angle formed by the line defined by the edge of the surface of the first end 310 facing the substrate 100 and the edge of the second end 320 and the plane (or P0) of the substrate 100 is equal to the first tilt angle Θ1. This causes the second electrode 230 to come into contact with the first end 310. In this case, the second electrode 230 and the first end 310 are considered to be already electrically connected.

[0272] For example, in some other embodiments of the present disclosure, as shown in FIG. 6 , the acute angle formed by the line P6, defined by the edge of the surface of the first end 310 facing the substrate 100 and the edge of the second end 320, and the plane (or P0) of the substrate 100 is greater than the first tilt angle Θ1. This allows the second electrode 230 to ride up to the side surface of the first end 310, i.e., the second electrode 230 overlaps and contacts at least a portion of the side surface of the first end 310. For example, FIG. 6 shows a case where the ride height is h0. In this way, the overlapping contact between the second electrode 230 and the first end 310 of the isolation structure 300 is ensured, and the portion of the second electrode 230 that overlaps and joins with the isolation structure 300 has a relatively large thickness, preventing poor contact or excessive electrical resistance at the joint. Note that in this case, the dimension L2 is expressed as L2 = (h1 - h0) / tan Θ2.

[0273] In some embodiments of the present disclosure, when the limit ranges of L1 and L2 are taken into consideration comprehensively, the minimum selectable dimension of the subpixel spacing can be further reduced by obtaining the minimum value of L1 + L2. For example, referring again to Figure 5, the acute angle formed by the line P3 determined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., the line P0 included therein) is equal to the first tilt angle Θ1, and the acute angle formed by the line P6 determined by the edge of the surface of the first end 310 facing the substrate 100 and the edge of the second end 320 and the plane of the substrate 100 is equal to the second tilt angle Θ2, i.e., L1 = h1 / tan Θ2 and L2 = h1 / tan Θ1. In this manner, when the layer thickness of each layer of the light-emitting element in the effective functional area 202 is guaranteed to be uniform, the second horizontal distance L1 between the edge of the effective functional area 202 and the edge of the second end 320 and the first horizontal width L2 between the edge of the first end 310 and the edge of the second end 320 are both minimized, thereby minimizing the distance between adjacent effective functional areas 202 and ensuring that the first functional layer 221 is isolated by the isolation structure 300 and maximizing the array density (corresponding to pixel density) of the light-emitting element 200. Note that in this configuration, the edge of the first functional layer 221 exactly contacts the isolation structure (e.g., the first end 310 included therein), but the thickness of the first functional layer 221 at the contact point theoretically approaches zero infinitely, so that the electrical resistance at the contact point becomes infinitely large and current does not enter the isolation structure 300 via the first functional layer 221. That is, the isolation structure 300 actually still achieves electrical isolation between adjacent first functional layers 221, and thus can prevent the reduction in luminous efficiency of the display panel caused by current leakage.

[0274] 5, the formula L1=h1 / tan Θ2 ignores the thickness of each layer in the first electrode 210 and the light-emitting functional layer 220, and the formula L1=h1 / tan Θ1 can be replaced with L1=H / tan Θ1. When the thicknesses of the first electrode 210 and the light-emitting functional layer 220 are taken into account, the thicknesses of the first electrode 210 and the light-emitting functional layer 220 must be subtracted from "H" in the above formula L1=H / tan Θ1.

[0275] 6, the isolation structure 300 can be directly disposed on the substrate 100. In this case, the dimensions of the first electrode 210 should be set to avoid overlapping with the isolation structure 300, thereby preventing current leakage and a decrease in light-emitting efficiency. In this case, the first electrode 210 defines the boundary of the effective functional area 202, i.e., the effective functional area 202 and the first electrode 210 overlap.

[0276] In some other embodiments of the present disclosure, as shown in FIG. 7 , the display panel includes a pixel definition layer 330. The pixel definition layer 330 is located between the isolation structure (e.g., the support portion 310) and the layer where the first electrode 210 is located, and covers the gap (region L4) between adjacent first electrodes 210. Second openings 302 are defined in the pixel definition layer 330, and the light-emitting functional layer 220 covers the second openings 302. The second openings 302 correspond to and communicate with the first openings 301. The orthogonal projection of the second openings 302 on the substrate 100 is inside the orthogonal projection of the corresponding first opening 301 on the substrate 100. The provision of the pixel definition layer 330 eliminates the risk of the first electrode 210 overlapping and joining to the adjacent isolation structure (e.g., the conductive first end 310 therein), allowing the first electrode 210 to have a large design dimension and ensure the design area of ​​the effective functional area 202.

[0277] The pixel defining layer 330 defines the exposed area of ​​the first electrode 210 (the area of ​​the portion that is in contact with the light-emitting functional layer 220), and therefore defines the boundary of the light-emitting region of the light-emitting element 200. If the thickness of each layer of the light-emitting functional layer 220 is non-uniform in the light-emitting region, this will result in non-uniform light emission efficiency of the light-emitting region. Therefore, the light-emitting region of the light-emitting element can be designed to be contained within or overlap with the effective functional region of the light-emitting functional layer 220, thereby ensuring that the entire light-emitting region emits light uniformly.

[0278] It should be noted that when designing the pixel density of the display panel, the above-mentioned parameters such as L1, L2 and h1(H) can be determined together when determining the dimensions of the effective functional area (or further, the main light-emitting area), and the detailed position of the boundary of the pixel definition layer 330 can also be determined, for example, the minimum boundary of the second opening 302 of the pixel definition layer 330 (the minimum dimension of the second opening 302) is the boundary of the effective functional area. In this case, when designing the display panel PPI, it is not necessary to consider the detailed position (dimension) of the pixel definition layer 330 before completing the dimension and position of the effective functional area, thereby reducing the number of structures involved in the design and lowering the design cost of the display panel.

[0279] In some embodiments of the present disclosure, taking into account the process accuracy (e.g., mask alignment accuracy) of forming the second opening in the pixel definition layer, the area of ​​the second opening can be designed to be slightly larger than the area of ​​the effective functional region, i.e., the orthogonal projection of the effective functional region on the substrate is within the orthogonal projection of the second opening on the substrate, thereby providing a sufficient alignment safety margin to ensure that all of the portion of the light-emitting functional layer located in the effective functional region can contact the first electrode. Alternatively, the area of ​​the second opening can be designed to be smaller than the area of ​​the effective functional region, thereby ensuring that the thickness of the portion of the light-emitting functional layer located within the second opening is uniform, allowing the entire light-emitting region of the light-emitting element to emit light.

[0280] 8A , the sidewall of the pixel definition layer 330 may be formed as an inclined surface having a certain degree of slope, and on the same side of the isolation structure 300, the boundary of the effective functional area may be determined by the boundary of the portion of the second electrode 230 with a uniform layer thickness. That is, the edge of the surface of the pixel definition layer 330 facing the substrate 100 may substantially overlap the boundary of the effective functional area, that is, the angle between the edge of the surface of the pixel definition layer 330 facing the substrate 100 and the second end 320 is equal to the first tilt angle Θ1. Furthermore, the acute angle formed by the line defined by the edge of the surface of the pixel definition layer 330 facing away from the substrate 100 and the edge of the second end 320 and the plane of the substrate 100 may be designed to be equal to the second tilt angle Θ2, that is, the first functional layer 221 begins to have a thickness non-uniformity at the edge of the surface of the pixel definition layer 330 facing away from the substrate 100. In view of the need for light transmittance, the total thickness of the second electrode 230 is relatively small. As a result, the second electrode 230 is prone to problems such as insufficient layer thickness, breakage, and poor continuity in areas with a large gradient. According to the above-described design of the present disclosure, the second distance L1 has a relatively small dimension, and the sidewalls of the pixel defining layer 330 have a relatively small gradient, so that the second electrode 230 can be more easily deposited on the sidewalls of the pixel defining layer 330 and has a relatively large layer thickness, thereby preventing the second electrode 230 from being broken due to poor layer continuity caused by steps.

[0281] For example, in some other embodiments of the present disclosure, the structure shown in Fig. 8B can be obtained by modifying the structure shown in Fig. 8A. Specifically, as shown in Fig. 8B, because the boundary of the effective functional area is determined by the boundary of the portion of the light-emitting layer where the layer thickness is uniform, the edge of the surface of pixel defining layer 330 facing substrate 100 can be designed to approximately overlap with the boundary of the effective functional area. That is, the included angle between the edge of the surface of pixel defining layer 330 facing substrate 100 and second end 320 (determined between second tilt angle Θ2 and first tilt angle Θ1) is equal to the included angle between a straight line P3 determined by the edge of the light-emitting layer and second end 320 and the plane of substrate 100. In this case, the boundary of the portion of the first functional layer 221 where the layer thickness is uniform overlaps with the edge of the surface of the pixel defining layer 330 facing the substrate 100 (in this case, the corresponding deposition angles of the first functional layer 221 and the light-emitting layer are equal), or is located on the side of the pixel defining layer 330 or on the surface facing away from the substrate 100 (in this case, the deposition angle facing the first functional layer 221 is larger than the deposition angle of the light-emitting layer). Furthermore, the acute angle formed by the line defined by the edge of the surface of the pixel defining layer 330 facing away from the substrate 100 and the edge of the second end 320 and the plane of the substrate 100 can be designed to be equal to the second tilt angle Θ2. That is, the first functional layer 221 begins to have a thickness non-uniformity at the edge of the surface of the pixel defining layer 330 facing away from the substrate 100. To meet the demand for light transmittance, the overall thickness of the second electrode 230 is relatively small, which makes the second electrode 230 prone to problems such as insufficient layer thickness, breakage, poor continuity, etc. in areas with a large gradient. According to the above-described design of the present disclosure, the second distance L1 can be made relatively small, and the sidewalls of the pixel defining layer 330 have a relatively small gradient, making the second electrode 230 more likely to deposit on the sidewalls of the pixel defining layer 330 and have a relatively large layer thickness, thereby preventing the second electrode 230 from having poor layer continuity due to steps and even breakage.

[0282] 8A , the cross-sectional shape of the pixel definition layer 330, perpendicular to the substrate 100, at a portion between two adjacent subpixels is a regular trapezoid. Furthermore, on the same side of the isolation structure 300, the acute angle formed by the edge of the pixel definition layer 330's surface facing the substrate 100 and the edge of the second end portion and the plane of the substrate 100 is equal to the first tilt angle Θ1. The boundary of the second opening 302 of the pixel definition layer 330 overlaps with the boundary of the effective functional area, so that the light-emitting area of ​​the light-emitting element 200 overlaps with the effective functional area, allowing all light-emitting portions of the light-emitting area to have maximum light-emitting efficiency and improving the uniformity of light emission. Correspondingly, this design ensures the maximum light-emitting efficiency of the light-emitting element 200 while obtaining the extendible range of the boundary of the pixel definition layer 330, thereby obtaining the maximum design width of the pixel definition layer 330 (the width of the portion between two adjacent first openings 301) and contributing to planning the width of the pixel gap (the gap between the light-emitting areas of adjacent light-emitting elements 200).

[0283] In the embodiment of the present disclosure, the pixel defining layer 330 is provided mainly to separate the first electrode 210 from the isolation portion of the isolation structure 300, and does not need to position the light-emitting functional layer 220. Therefore, the pixel defining layer 330 can be designed to have a relatively small thickness. This not only reduces the step at the boundary of the pixel defining layer 330 (if it is too large, the film formation quality will be deteriorated), but also contributes to the lightweight design of the display panel. However, a pixel defining layer 330 with a small thickness will form a conformal recess in the gap between adjacent first electrodes 210, which may affect the quality of subsequent layers.

[0284] For example, as shown in FIG. 7 , the portion of the pixel defining layer 330 that covers the gaps in the first electrodes 210 (which have a concave shape according to the substrate 100) conforms to the gaps in the first electrodes 210 to form a concave. For example, the pixel defining layer 330 is an inorganic material layer, which allows the pixel defining layer 330 to have a thin thickness and high insulating properties. For example, the material of the pixel defining layer 330 may be silicon oxide, silicon nitride, silicon oxynitride, etc. Small molecule substances remaining in the film formation process using organic materials are prone to generating miscellaneous gases, which results in high outgassing values. On the other hand, pixel defining layers 330 made of inorganic materials have more stable chemical properties. Therefore, the pixel defining layer 330 of this embodiment can improve the stability of a display panel.

[0285] For example, the thickness of pixel defining layer 330 may be between 1000 Angstroms and 5000 Angstroms.

[0286] It should be noted that the thickness of the pixel definition layer 330 is the thickness of the portion of the pixel definition layer 330 between adjacent first electrodes 210, or the thickness of the portion of the pixel definition layer 330 covering the first electrodes 210 (not considering the sidewall portions of the pixel definition layer 330).

[0287] 7 , the gap between the orthogonal projections of adjacent first electrodes 210 on the substrate 100 is located within the orthogonal projections of the surfaces of the first ends 310 facing the substrate 100 on the substrate 100. That is, the width L4 of the gap between the first electrodes 210 is smaller than the width L3 of the first ends 310, thereby allowing the first ends 310 of the isolation structures to cover the recesses on the pixel definition layer 330.

[0288] 8A , the gap between the orthogonal projections of adjacent first electrodes 210 on the substrate 100 overlaps with the orthogonal projections of the surfaces of the first ends 310 facing the substrate 100 on the substrate 100. That is, the width L4 of the gap between the first electrodes 210 is equal to the width L3 of the first ends 310. In this manner, the minimum designable width of the first ends 310 of the isolation structure 300 can be reduced, and therefore the minimum spacing between adjacent effective functional areas 202 can be reduced. This ensures that the first functional layers 221 are isolated by the isolation structures 300 and improves the array density (corresponding to pixel density) of the light-emitting elements 200.

[0289] For example, the substrate 100 may include a substrate and a driving circuit layer on the substrate. The driving circuit layer includes a plurality of pixel driving circuits located in the display area, and the display function layer is located on the driving circuit layer. For example, the pixel driving circuit may include a plurality of transistors (TFTs), capacitors, etc., and can be configured in various forms, such as 2T1C (i.e., two transistors (TFTs) and one capacitor (C)), 3T1C, or 7T1C. The pixel driving circuit is connected to the light-emitting element 200 to control the switching state and light-emitting brightness of the light-emitting element 200.

[0290] In at least one embodiment of the present disclosure, as shown in FIG. 9 , the display panel may further include a first encapsulating layer 510. The first encapsulating layer 510 covers at least the light-emitting element 200, thus protecting the layers of the light-emitting element 200 during the manufacturing process of the display panel. Although the light-emitting elements 200 emitting different light are manufactured separately, the layers of each light-emitting element 200 (e.g., deposition layers such as light-emitting functional layers) are deposited over the entire surface of the display panel. For example, the light-emitting elements 200 are classified into light-emitting elements emitting red light (R), green light (G), and blue light (B), respectively, and the light-emitting elements R, G, and B are manufactured sequentially during manufacturing. When manufacturing the light-emitting element R, the light-emitting element R is formed in each of the first openings 301, and the first encapsulating layer 510 is manufactured on the display panel to cover the light-emitting element R. Then, the first encapsulating layer 510 and the second electrode and light-emitting functional layer of the light-emitting element R are removed from some of the first openings 301 (those that constitute the light-emitting elements G and B in the final product). In this process, the first sealing layer 510 is used to protect the light-emitting element R in the other first opening 301. Based on this method, light-emitting elements G and B are further manufactured in sequence, and finally the first sealing layer 510 as shown in Fig. 9 is formed. Hereinafter, the manufacturing process of the display panel shown in Fig. 9 will be described with reference to Figs. 10 to 13.

[0291] It should be noted that since the first sealing layer 510 has a sealing effect on the light-emitting element, it can be referred to as a sealing layer (where only one layer is provided) or can be considered as one layer of the sealing layers (in the case of multiple sealing layers).

[0292] As shown in Figure 10, a substrate 100 is provided, and first electrodes 210 arranged in an array are formed on the substrate 100. An insulating material layer (e.g., an inorganic material layer) is deposited on the substrate 100 on which the first electrodes 210 have been formed. Support portions 310 and stop portions 320 are formed in the display panel. The insulating material layer is patterned to form pixel definition layers 330 (having a grid-like planar shape). The pixel definition layers 330 cover the gaps between adjacent first electrodes 210. In this way, the pixel definition layers 330 have a grid-like planar shape.

[0293] In the embodiment of the present disclosure, the patterning process may be a photolithography patterning process, which may include, for example, applying a photoresist to a structural layer to be patterned, exposing the photoresist using a photomask, developing the exposed photoresist to obtain a photoresist pattern, etching the structural layer using the photoresist pattern (wet etching or dry etching can be selected), and then selectively removing the photoresist pattern. Note that when the material of the structural layer (e.g., the photoresist pattern 500 described below) includes photoresist, the desired pattern can be formed by directly exposing the structural layer using a photomask.

[0294] As shown in FIG. 11 , a light-emitting functional layer and a second electrode are deposited on the substrate 100. Here, the deposition source is deposited at a first deposition angle (second tilt angle) to form the first functional layer 221, and at a second deposition angle (first tilt angle) to form the second electrode 230. In this manner, the light-emitting element 200 is formed in each of the first openings 301 of the isolation structure 300. Because no mask is used in the deposition process, the deposited material also deposits on the stopper 320. Then, a first sealing layer 510 is deposited to cover the light-emitting element 200. For example, the light-emitting layer in the deposited light-emitting functional layer 220 can emit red light. That is, in this step, a light-emitting element 200 emitting red light is formed in each of the first openings 301 of the isolation structure 300.

[0295] 12, a photoresist is formed (for example, by coating) on ​​the substrate 100 on which the first sealing layer 510 has been formed, and then a patterning process is performed thereon to form a photoresist pattern 500. The photoresist pattern 500 covers only a part of the first openings 301.

[0296] 13, the surface of the display panel is etched to remove the first sealing layer 510, the second electrode 230, and the light-emitting functional layer 220 that are not covered by the photoresist pattern 500. Then, the remaining photoresist pattern 500 is removed.

[0297] By repeating the steps of Figures 11 to 13 described above, a light-emitting element 200 emitting green light and a light-emitting element 200 emitting blue light are formed in the other first openings 301, respectively, to form a display panel as shown in Figure 9.

[0298] In some embodiments of the present disclosure, some layers in the light-emitting functional layer, such as the light-emitting layer, can be manufactured by a method other than vapor deposition (e.g., inkjet printing). Specifically, the method can be selected based on the materials of these layers. For example, if these layers are made of polymeric materials that are not suitable for vapor deposition, they can be manufactured by inkjet printing.

[0299] In conventional OLED display panel designs, deposition of layers in light-emitting elements must be individually manufactured using a mask (e.g., an FMM mask), limiting the need for precision due to multiple alignments and requiring a relatively large subpixel gap (the gap between adjacent light-emitting elements, corresponding to the pixel spacing). Furthermore, conventional OLEDs require a relatively thick pixel definition layer to restrict the position of the light-emitting element (although the embodiments described later in this disclosure are not limited to positioning the light-emitting element using the pixel definition layer), and the light-emitting element is completely contained within the opening of the pixel definition layer. In this case, the pixel definition layer is too thick, and the sidewalls of the pixel definition layer openings must have a large slope, which occupies a large space, further increasing the subpixel gap. Furthermore, limited by alignment precision, it is difficult to further reduce the size of the light-emitting element itself. Conventional OLED display panels based on FMM technology have difficulty achieving a pixel density exceeding 403 PPI because the subpixel width cannot be less than 4 micrometers. Furthermore, the minimum subpixel gap is only 17 micrometers, and even 20 micrometers is difficult to achieve.

[0300] Below, we will explain in detail how to improve the pixel density of a display panel beyond 403 PPI, and the specific structure of the display panel in that case.

[0301] In some embodiments of the present disclosure, a display panel includes a substrate, an isolation structure, and a plurality of pixels disposed on the substrate. The isolation structure has a plurality of first openings, and each pixel includes a plurality of subpixels emitting light of different wavelengths (each subpixel emits a single type of light, and the light emitted by different subpixels has a different wavelength). The subpixels include a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked on the substrate, with the subpixel light-emitting layer disposed in the first opening and the second electrode connected to the isolation structure. The isolation structure allows the pixel array density to range from 90 to 7400 PPI. In the above-described embodiment, the isolation structure eliminates the need for a mask for deposition of the subpixel deposition layer, thereby eliminating alignment accuracy issues during deposition. This allows the spacing between adjacent subpixels to be reduced, thereby achieving a high pixel density for the display panel. According to the needs of the application scenario, it can be set to different values, specifically in the range of 404-2000 PPI, or in the range of 2000-7400 PPI, and of course, it can be set to a value in the range of 90-403 PPI according to actual needs. Regarding the planar structure of the display panel and the principle of PPI improvement, please refer to the related explanation in the above-mentioned embodiment, and the description will be omitted here.

[0302] In the embodiments of the present disclosure, pixel density can be improved by reducing the sub-pixel width, reducing the sub-pixel spacing, or simultaneously reducing the sub-pixel width and the sub-pixel spacing, etc. Hereinafter, the structures of display panels corresponding to the above-mentioned different methods will be described in detail in accordance with different embodiments.

[0303] In some embodiments of the present disclosure, pixel density can be improved by reducing only the spacing between subpixels. For example, the average width of the subpixels can be designed to be 4 micrometers or more, and the gap between the subpixels can be designed to be 8 micrometers or more and 17 micrometers or less. In this way, the pixel array density can be 404 PPI to 1058 PPI. Here, if the average width of the subpixels is designed to be 4 micrometers and the gap between the subpixels is designed to be 8 micrometers, the pixel array density will be approximately 706 PPI or 1058 PPI.

[0304] For example, the display function layer includes a plurality of light-emitting elements corresponding to subpixels. The types, positional relationships, and positional relationships of each layer in the light-emitting element and its isolation structure may be described in the embodiments shown in FIGS. 1 to 3, and are not further described here. In this embodiment, as shown in FIG. 4, the distance h1 between the edge of the first end 310 and the edge of the second end 320 in the direction perpendicular to the substrate 100 is 0.6 micrometers or more, the width of the first end 310 is 2 micrometers or more, and the width of the second end 320 is 4 micrometers or more. Furthermore, on one side of the isolation structure 300, the second distance L1 between the orthogonal projection of the edge of the effective functional area 202 on the substrate 100 and the orthogonal projection of the edge of the second end 320 on the substrate 100 is 2 micrometers or more, thereby providing a subpixel gap of 8 micrometers or more. For example, the second tilt angle is 40 to 70 degrees.

[0305] 5, in a cross section perpendicular to the substrate 100, on one side of the isolation structure 300, the acute angle formed by a line P4 defined by the edge of the second electrode 230 and the edge of the second end 320 and the plane of the substrate 100 is a first tilt angle Θ1, which is smaller than the second tilt angle Θ2. The acute angle formed by a line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., line P0) is smaller than the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be 20 to 70 degrees.

[0306] For example, as shown in Figure 5, the acute angle formed by the straight line P3 determined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., the line P0 contained therein) is equal to the first tilt angle Θ1, and the acute angle formed by the straight line P6 determined by the edge of the surface of the first end 310 facing the substrate 100 and the edge of the second end 320 and the plane of the substrate 100 is equal to the second tilt angle Θ2, i.e., L1 = H / tan Θ2 (the calculation of H in this formula does not take into account the layer thicknesses of the first electrode and the light-emitting functional layer) and L2 = h1 / tan Θ1. For example, the width (L3) of the first end 310 is 2 micrometers, the width (2L2+L3) of the second end 320 is 4 micrometers, and the second distance L1 between the edge of the effective functional area 202 and the edge of the second end 320 as orthogonally projected on the substrate 100 on one side of the isolation structure 300 is 2 micrometers, thus resulting in a subpixel gap of 8 micrometers. For example, furthermore, in each pixel, the average width of the subpixels is 4 micrometers, thus resulting in a pixel array density of 706 PPI or 1058 PPI.

[0307] The "average width of a subpixel" refers to the ratio of the sum of the widths of the subpixels in each pixel to the number of subpixels. For example, as shown in Fig. 2, each pixel P includes a first subpixel B, a second subpixel G, and a third subpixel R that emit light of gradually increasing wavelengths, and the first subpixel B, the second subpixel G, and the third subpixel R emit blue light, green light, and red light, respectively. The ratio of the numbers of the first subpixel B, the second subpixel G, and the third subpixel R in the display panel according to this embodiment is 1:1:1.

[0308] For example, in some designs, the widths of the first subpixel B, the second subpixel G, and the third subpixel R are all 4 micrometers, as shown in FIG.

[0309] 14, the first subpixel B, the second subpixel G, and the third subpixel R are arranged in multiple rows, and the width direction of the first subpixel B, the second subpixel G, and the third subpixel R is the same as the row direction (e.g., the X-axis direction). The first subpixel B, the second subpixel G, and the third subpixel R in each pixel are arranged in order along the row direction, and the width a1 of the first subpixel B, the width a2 of the second subpixel G, and the width a3 of the third subpixel R gradually decrease. The width a1 of the first subpixel B is greater than 4 micrometers, and the width a3 of the third subpixel R is less than 4 micrometers. Therefore, the average width (a1 + a2 + a3) / 3 of the first subpixel B, the second subpixel G, and the third subpixel R is 4 micrometers.

[0310] In the above design, the width (which may be referred to as pitch = a1 + a2 + a3 + 3b) of each pixel (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 36 micrometers, and therefore the pixel array density is 706 PPI, where b = 2L1 + 2L2 + L3.

[0311] 15, in another design, the first subpixels B, second subpixels G, and third subpixels R are arranged in multiple columns, with the width direction of the first subpixels B, second subpixels G, and third subpixels R perpendicular to the column direction. The column in which the second subpixels G and third subpixels R are located is different from the column in which the first subpixels B are located. In the column in which the second subpixels G and third subpixels R are located, the column in which the second subpixels G and third subpixels R and the first subpixels B are located are swapped with the column in which the second subpixels G are located. The number of second subpixels G and third subpixels R is equal.

[0312] 15, the widths of the second subpixel G and the third subpixel R are both 4 micrometers, or the widths of the second subpixel G and the third subpixel R decrease in order, with the width of the first subpixel being greater than 4 micrometers and the widths of the second and third subpixels being equal but less than 4 micrometers. In the above design, the width (which may be referred to as pitch=2a+2b) of each pixel P (including the first subpixel B, the second subpixel G, and the third subpixel R) is 24 micrometers, and therefore the pixel array density is 1058 PPI, where b=2L1+2L2+L3.

[0313] In the embodiment of the present disclosure, the PPI may be calculated as the ratio of 25.4 mm to the pitch. For example, in the pixel array shown in FIG. 14, if the pitch is 36 micrometers, the PPI is approximately 706, and if the pitch is 24 micrometers, the PPI is approximately 1058.

[0314] In some embodiments of the present disclosure, pixel density can be improved by reducing only the width of the subpixels. For example, the average width of the subpixels is designed to be 2 micrometers or more, and the gap between the subpixels is designed to be 17 micrometers or more. This results in a pixel array density of 404 PPI to 668 PPI. Here, if the average width of the subpixels is designed to be 2 micrometers and the gap between the subpixels is designed to be 17 micrometers, the pixel array density will be approximately 446 PPI or 668 PPI.

[0315] For example, the display panel may further include a substrate and a display function layer disposed on the substrate. The display function layer includes a plurality of light-emitting elements corresponding to subpixels. The types, positional relationships, and positional relationships of each layer in the light-emitting element and its isolation structure may be described in the embodiment described above with reference to FIGS. 1 to 3, and are therefore omitted here. In this embodiment, as shown in FIG. 4, the distance h1 between the edge of the first end 310 and the edge of the second end 320 in the direction perpendicular to the substrate 100 is 0.6 micrometers or more, the width of the first end 310 is 2 micrometers or more, and the width of the second end 320 is 4 micrometers or more. Furthermore, on one side of the isolation structure 300, the second distance L1 between the orthogonal projection of the edge of the effective functional area 202 on the substrate 100 and the orthogonal projection of the edge of the second end 320 on the substrate 100 is 6.5 micrometers or more, thereby achieving a subpixel gap of 17 micrometers or more. For example, the second tilt angle is 40 to 70 degrees.

[0316] 5, in a cross section perpendicular to the substrate 100, the acute angle formed by a line P4 defined by the edge of the second electrode 230 and the edge of the second end 320 on one side of the isolation structure 300 and the plane of the substrate 100 is a first tilt angle Θ1, which is smaller than the second tilt angle Θ2. The acute angle formed by a line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., line P0) is smaller than the first tilt angle Θ1. In this case, the first tilt angle Θ1 may be designed to be 20 to 70 degrees.

[0317] 5, the acute angle formed by a straight line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., a line P0 included therein) is equal to the first tilt angle Θ1, and the acute angle formed by a straight line P6 defined by the edge of the surface of the first end 310 facing the substrate 100 and the edge of the second end 320 and the plane of the substrate 100 is equal to the second tilt angle Θ2. That is, L1=H / tan Θ2 (the calculation of H in this formula does not take into account the layer thicknesses of the first electrode and the light-emitting functional layer), and L2=h1 / tan Θ1. For example, the width of the first end 310 is 2 micrometers, the width of the second end 320 is 4 micrometers, and the second distance L1 between the edge of the active functional area 202 and the edge of the second end 320 on one side of the isolation structure 300, as orthogonally projected on the substrate 100, is 6.5 micrometers, resulting in a subpixel gap of 17 micrometers. For example, in each pixel, the average width of the subpixels is 2 micrometers, resulting in a pixel array density of 446 PPI or 668 PPI. For example, in the pixel array structures shown in FIGS. 2 and 14 , the widths of the first subpixel B, the second subpixel G, and the third subpixel R are all 2 micrometers, or the width of the first subpixel B is greater than 2 micrometers and the width of the third subpixel R is less than 2 micrometers, resulting in an average width of the first subpixel B, the second subpixel G, and the third subpixel R being 2 micrometers. In the above design, the width (called pitch) of each pixel (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 57 micrometers, which results in a pixel array density of 446 PPI. The design of the average width of the sub-pixels can be referred to in the relevant description of the above-mentioned embodiment, and is therefore omitted here.

[0318] 15, the widths of the second subpixel G and the third subpixel R are both 2 micrometers, or the widths of the second subpixel G and the third subpixel R decrease in order, with the width of the first subpixel being greater than 2 micrometers and the widths of the second subpixel and the third subpixel being equal but less than 2 micrometers. In the above design, the width (referred to as "pitch") of each pixel P (including the first subpixel B, the second subpixel G, and the third subpixel R) is 38 micrometers, thereby achieving a pixel array density of 668 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and will not be repeated here.

[0319] In some embodiments of the present disclosure, pixel density can be improved by reducing the spacing between subpixels and the width of the subpixels. For example, the average width of the subpixels can be designed to be 2 micrometers or more, and the gap between the subpixels can be designed to be 8 micrometers or more and 17 micrometers or less, thereby achieving a pixel array density of 404 PPI to 1270 PPI. Here, if the average width of the subpixels is designed to be 2 micrometers and the gap between the subpixels is designed to be 8 micrometers, the pixel array density will be approximately 847 PPI or 1270 PPI.

[0320] For example, the display panel may further include a substrate and a display function layer disposed on the substrate. The display function layer includes a plurality of light-emitting elements corresponding to subpixels. The types, positional relationships, and positional relationships of each layer in the light-emitting element and its isolation structure may be described in the relevant descriptions of the embodiment described above with reference to FIGS. 1 to 3, and are omitted here. In this embodiment, as shown in FIG. 4, the distance between the edge of the first end 310 and the edge of the second end 320 in a direction perpendicular to the substrate 100 is 0.6 micrometers or more, the width of the first end 310 is 2 micrometers or more, the width of the second end 320 is 4 micrometers or more, and on one side of the isolation structure 300, the distance between the edge of the effective functional area 202 and the edge of the second end 320, as viewed in orthogonal projection on the substrate 100, is 2 micrometers or more, thereby providing a subpixel gap of 8 micrometers or more. For example, the second tilt angle is 40 to 70 degrees.

[0321] 5, in a cross section perpendicular to the substrate 100, the acute angle formed by a line P4 defined by the edge of the second electrode 230 and the edge of the second end 320 on one side of the isolation structure 300 and the plane of the substrate 100 is a first tilt angle Θ1, which is smaller than the second tilt angle Θ2. The acute angle formed by a line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., line P0) is smaller than the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be 20 to 70 degrees.

[0322] 5, the acute angle formed by a straight line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., a line P0 included therein) is equal to the first tilt angle Θ1, and the acute angle formed by a straight line P6 defined by the edge of the surface of the first end 310 facing the substrate 100 and the edge of the second end 320 and the plane of the substrate 100 is equal to the second tilt angle Θ2. That is, L1=H / tan Θ2 (the calculation of H in this formula does not take into account the layer thicknesses of the first electrode and the light-emitting functional layer), and L2=h1 / tan Θ1. For example, the width of the first end 310 is 2 micrometers, the width of the second end 320 is 4 micrometers, and on one side of the isolation structure 300, the distance between the edge of the active functional area 202 and the edge of the second end 320 as projected on the substrate 100 is 2 micrometers, thereby resulting in a subpixel gap of 8 micrometers. Furthermore, for example, in each pixel, the average width of the subpixels is 2 micrometers, thereby resulting in a pixel array density of 847 PPI or 1270 PPI.

[0323] 2 and 14, the widths of the first subpixel B, the second subpixel G, and the third subpixel R are all 2 micrometers, or the width of the first subpixel B is greater than 2 micrometers and the width of the third subpixel R is less than 2 micrometers, so that the average width of the first subpixel B, the second subpixel G, and the third subpixel R is 2 micrometers. In the above design, the width (called pitch) of each pixel (including the first subpixel B, the second subpixel G, and the third subpixel R) is 30 micrometers, so that the pixel array density is 847 PPI. For the design of the average width of the subpixels, please refer to the related descriptions in the previous embodiments and will not be repeated here.

[0324] 15, the widths of the second subpixel G and the third subpixel R are both 2 micrometers, or the widths of the second subpixel G and the third subpixel R decrease in order, with the width of the first subpixel being greater than 2 micrometers and the widths of the second subpixel and the third subpixel being equal but less than 2 micrometers. In the above design, the width (referred to as "pitch") of each pixel P (including the first subpixel B, the second subpixel G, and the third subpixel R) is 20 micrometers, thereby achieving a pixel array density of 1270 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and will not be repeated here.

[0325] In some embodiments of the present disclosure, pixel density can be improved by reducing the spacing between subpixels and the width of the subpixels. For example, the average width of the subpixels can be designed to be 1.5 micrometers or more, and the gap between the subpixels can be designed to be 7 micrometers or more and 17 micrometers or less, thereby achieving a pixel array density of 404 PPI to 1500 PPI. Here, if the average width of the subpixels is designed to be 1.5 micrometers and the gap between the subpixels is designed to be 7 micrometers, the pixel array density will be approximately 1000 PPI or 1500 PPI.

[0326] For example, the display panel may further include a substrate and a display function layer disposed on the substrate. The display function layer includes a plurality of light-emitting elements corresponding to subpixels. The types, positional relationships, and positional relationships of each layer in the light-emitting element and its isolation structure may be described in the relevant descriptions of the embodiment described above with reference to FIGS. 1 to 3, and are omitted here. In this embodiment, as shown in FIG. 4, the distance between the edge of the first end 310 and the edge of the second end 320 in a direction perpendicular to the substrate 100 is 0.6 micrometers or more, the width of the first end 310 is 2 micrometers or more, the width of the second end 320 is 4 micrometers or more, and on one side of the isolation structure 300, the second distance L1 between the edge of the effective functional area 202 and the edge of the second end 320 as orthogonally projected on the substrate 100 is 1.5 micrometers or more, thereby providing a subpixel gap of 7 micrometers or more. For example, the second tilt angle is 40 to 70 degrees.

[0327] 5, in a cross section perpendicular to the substrate 100, the acute angle formed by a line P4 defined by the edge of the second electrode 230 and the edge of the second end 320 on one side of the isolation structure 300 and the plane of the substrate 100 is a first tilt angle Θ1, which is smaller than the second tilt angle Θ2. The acute angle formed by a line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., line P0) is smaller than the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be 20 to 70 degrees.

[0328] 5, the acute angle formed by a straight line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., a line P0 included therein) is equal to the first tilt angle Θ1, and the acute angle formed by a straight line P6 defined by the edge of the surface of the first end 310 facing the substrate 100 and the edge of the second end 320 and the plane of the substrate 100 is equal to the second tilt angle Θ2. That is, L1=H / tan Θ2 (the calculation of H in this formula does not take into account the layer thicknesses of the first electrode and the light-emitting functional layer), and L2=h1 / tan Θ1. For example, the width of the first end 310 is 2 micrometers, the width of the second end 320 is 4 micrometers, and the second distance L1 between the edge of the effective functional area 202 and the edge of the second end 320, as orthogonally projected on the substrate 100, on one side of the isolation structure 300 is 1.5 micrometers, thereby resulting in a subpixel gap of 7 micrometers. For example, further, in each pixel, the average width of the subpixels is 1.5 micrometers, thereby resulting in a pixel array density of 1000 PPI or 1500 PPI.

[0329] 2 and 14, the widths of the first subpixel B, the second subpixel G, and the third subpixel R are all 1.5 micrometers, or the width of the first subpixel B is greater than 1.5 micrometers and the width of the third subpixel R is less than 1.5 micrometers, so that the average width of the first subpixel B, the second subpixel G, and the third subpixel R is 1.5 micrometers. In the above design, the width (called pitch) of each pixel (including the first subpixel B, the second subpixel G, and the third subpixel R) is 25.5 micrometers, so that the pixel array density is 1000 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and will not be repeated here.

[0330] 15, the widths of the second subpixel G and the third subpixel R are both 1.5 micrometers, or the widths of the second subpixel G and the third subpixel R decrease in order, with the width of the first subpixel being greater than 1.5 micrometers and the widths of the second subpixel and the third subpixel being equal but less than 1.5 micrometers. In the above design, the width (referred to as "pitch") of each pixel P (including the first subpixel B, the second subpixel G, and the third subpixel R) is 17 micrometers, thereby achieving a pixel array density of 1500 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and will not be repeated here.

[0331] 2 and 14, the widths of the first subpixel B, the second subpixel G, and the third subpixel R are all 2 micrometers, or the width of the first subpixel B is greater than 2 micrometers and the width of the third subpixel R is less than 2 micrometers, so that the average width of the first subpixel B, the second subpixel G, and the third subpixel R is 2 micrometers. In the above design, the width (called pitch) of each pixel (including the first subpixel B, the second subpixel G, and the third subpixel R) is 27 micrometers, so that the pixel array density is 941 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and will not be repeated here.

[0332] 15, the widths of the second subpixel G and the third subpixel R are both 2 micrometers, or the widths of the second subpixel G and the third subpixel R decrease in order, with the width of the first subpixel being greater than 2 micrometers and the widths of the second subpixel and the third subpixel being equal but less than 2 micrometers. In the above design, the width (referred to as "pitch") of each pixel P (including the first subpixel B, the second subpixel G, and the third subpixel R) is 18 micrometers, thereby achieving a pixel array density of 1411 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and a detailed description thereof will be omitted here.

[0333] In some embodiments of the present disclosure, pixel density can be improved by reducing the spacing between subpixels and the width of the subpixels. For example, the average width of the subpixels can be designed to be 1.35 micrometers or more, and the gap between the subpixels can be designed to be 5 micrometers or more and 17 micrometers or less, thereby achieving a pixel array density of 404 PPI to 2000 PPI. Here, if the average width of the subpixels is designed to be 1.35 micrometers and the gap between the subpixels is designed to be 5 micrometers, the pixel array density will be approximately 1333 PPI or 2000 PPI.

[0334] For example, the display panel may further include a substrate and a display function layer disposed on the substrate. The display function layer includes a plurality of light-emitting elements corresponding to subpixels. The types, positional relationships, and positional relationships of each layer in the light-emitting element and its isolation structure may be described in the relevant descriptions of the embodiment described above with reference to FIGS. 1 to 3, and are omitted here. In this embodiment, as shown in FIG. 4, the distance between the edge of the first end 310 and the edge of the second end 320 in a direction perpendicular to the substrate 100 is 0.6 micrometers or more, the width of the second end 320 is 3.5 micrometers or more, and the width of the first end 310 is 2 micrometers or more. Furthermore, on one side of the isolation structure 300, the second distance L1 between the edge of the effective functional area 202 and the edge of the second end 320, as orthogonally projected on the substrate 100, is 0.75 micrometers or more, thereby providing a subpixel gap of 5 micrometers or more. For example, the second tilt angle is 40 to 70 degrees.

[0335] 5, in a cross section perpendicular to the substrate 100, the acute angle formed by a line P4 defined by the edge of the second electrode 230 and the edge of the second end 320 on one side of the isolation structure 300 and the plane of the substrate 100 is a first tilt angle Θ1, which is smaller than the second tilt angle Θ2. The acute angle formed by a line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., line P0) is smaller than the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be 20 to 70 degrees.

[0336] 5, the acute angle formed by a straight line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., a line P0 included therein) is equal to the first tilt angle Θ1, and the acute angle formed by a straight line P6 defined by the edge of the surface of the first end 310 facing the substrate 100 and the edge of the second end 320 and the plane of the substrate 100 is equal to the second tilt angle Θ2. That is, L1=H / tan Θ2 (the calculation of H in this formula does not take into account the layer thicknesses of the first electrode and the light-emitting functional layer) and L2=h1 / tan Θ1. For example, the width of the second end 320 is 3.5 micrometers, the width of the first end 310 is 2 micrometers, and the second distance L1 between the edge of the effective functional area 202 and the edge of the second end 320, as projected on the substrate 100, on one side of the isolation structure 300 is 0.75 micrometers, thereby resulting in a subpixel gap of 5 micrometers. Furthermore, for example, in each pixel, the average width of the subpixels is 1.35 micrometers, thereby resulting in a pixel array density of 1333 PPI or 2000 PPI.

[0337] For example, in the pixel array structures shown in Figures 2 and 14, the widths of the first subpixel B, the second subpixel G, and the third subpixel R are all 1.35 micrometers, or the width of the first subpixel B is greater than 1.35 micrometers and the width of the third subpixel R is less than 1.35 micrometers, resulting in an average width of the first subpixel B, the second subpixel G, and the third subpixel R being 1.35 micrometers. In the above design, the width (referred to as "pitch") of each pixel (including the first subpixel B, the second subpixel G, and the third subpixel R) is 19.05 micrometers, resulting in a pixel array density of 1333 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and will not be repeated here.

[0338] For example, in the pixel array structure shown in Figure 15, the widths of the second subpixel G and the third subpixel R are both 1.35 micrometers, or the widths of the second subpixel G and the third subpixel R decrease in order, with the width of the first subpixel being greater than 1.35 micrometers and the widths of the second subpixel and the third subpixel being equal but less than 1.35 micrometers. In the above design, the width (referred to as "pitch") of each pixel P (including the first subpixel B, the second subpixel G, and the third subpixel R) is 12.7 micrometers, thereby achieving a pixel array density of 2000 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and will not be repeated here.

[0339] In some embodiments of the present disclosure, pixel density can be improved by reducing the spacing between subpixels and making the subpixel width very small. For example, the average width of the subpixels can be designed to be 4.8 micrometers or more, and the gap between the subpixels can be designed to be 12 micrometers or more and 17 micrometers or less, thereby achieving a pixel array density of 404 PPI to 756 PPI. Here, if the average width of the subpixels is designed to be 4.8 micrometers and the gap between the subpixels is designed to be 7 micrometers, the pixel array density will be approximately 504 PPI or 756 PPI.

[0340] For example, the display panel may further include a substrate and a display function layer disposed on the substrate. The display function layer includes a plurality of light-emitting elements corresponding to subpixels. The types, positional relationships, and positional relationships of each layer in the light-emitting element and its isolation structure may be described in the relevant descriptions of the embodiment described above with reference to FIGS. 1 to 3, and are omitted here. In this embodiment, as shown in FIG. 4, the distance between the edge of the first end 310 and the edge of the second end 320 in a direction perpendicular to the substrate 100 is 0.6 micrometers or more, the width of the first end 310 is 2 micrometers or more, the width of the second end 320 is 4 micrometers or more, and on one side of the isolation structure 300, the second distance L1 between the edge of the effective functional area 202 and the edge of the second end 320 as orthogonally projected on the substrate 100 is 4 micrometers or more, thereby providing a subpixel gap of 12 micrometers or more. For example, the second tilt angle is 40 to 70 degrees.

[0341] 5, in a cross section perpendicular to the substrate 100, the acute angle formed by a line P4 defined by the edge of the second electrode 230 and the edge of the second end 320 on one side of the isolation structure 300 and the plane of the substrate 100 is a first tilt angle Θ1, which is smaller than the second tilt angle Θ2. The acute angle formed by a line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., line P0) is smaller than the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be 20 to 70 degrees.

[0342] 5, the acute angle formed by a straight line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., a line P0 included therein) is equal to the first tilt angle Θ1, and the acute angle formed by a straight line P6 defined by the edge of the surface of the first end 310 facing the substrate 100 and the edge of the second end 320 and the plane of the substrate 100 is equal to the second tilt angle Θ2. That is, L1=H / tan Θ2 (the calculation of H in this formula does not take into account the layer thicknesses of the first electrode and the light-emitting functional layer) and L2=h1 / tan Θ1. For example, the width of the first end 310 is 2 micrometers, the width of the second end 320 is 4 micrometers, and the second distance L1 between the edge of the effective functional area 202 and the edge of the second end 320, as projected on the substrate 100, on one side of the isolation structure 300 is 4 micrometers, thereby resulting in a subpixel gap of 12 micrometers. Furthermore, for example, the average width of the subpixels in each pixel is 4.8 micrometers, thereby resulting in a pixel array density of 504 PPI or 756 PPI.

[0343] 2 and 14, the widths of the first subpixel B, the second subpixel G, and the third subpixel R are all 4.8 micrometers, or the width of the first subpixel B is greater than 4.8 micrometers and the width of the third subpixel R is less than 4.8 micrometers, resulting in an average width of the first subpixel B, the second subpixel G, and the third subpixel R being 4.8 micrometers. In the above design, the width (referred to as "pitch") of each pixel (including the first subpixel B, the second subpixel G, and the third subpixel R) is 50.4 micrometers, resulting in a pixel array density of 504 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and will not be repeated here.

[0344] 15, the widths of the second subpixel G and the third subpixel R are both 4.8 micrometers, or the widths of the second subpixel G and the third subpixel R decrease in order, with the width of the first subpixel being greater than 4.8 micrometers and the widths of the second subpixel and the third subpixel being equal but less than 4.8 micrometers. In the above design, the width (referred to as "pitch") of each pixel P (including the first subpixel B, the second subpixel G, and the third subpixel R) is 33.6 micrometers, thereby achieving a pixel array density of 756 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and will not be repeated here.

[0345] In some embodiments of the present disclosure, pixel density can be improved by reducing the spacing between subpixels and the width of the subpixels. For example, the average width of the subpixels can be designed to be 2.8 micrometers or more, and the gap between the subpixels can be designed to be 10 micrometers or more and 17 micrometers or less, thereby achieving a pixel array density of 404 PPI to 756 PPI. Here, if the average width of the subpixels is designed to be 2.8 micrometers and the gap between the subpixels is designed to be 7 micrometers, the pixel array density will be approximately 661 PPI or 992 PPI.

[0346] For example, the display panel may further include a substrate and a display function layer disposed on the substrate. The display function layer includes a plurality of light-emitting elements corresponding to subpixels. The types, positional relationships, and positional relationships of each layer in the light-emitting element and its isolation structure may be described in the relevant descriptions of the embodiment described above with reference to FIGS. 1 to 3, and are omitted here. In this embodiment, as shown in FIG. 4, the distance between the edge of the first end 310 and the edge of the second end 320 in a direction perpendicular to the substrate 100 is 0.6 micrometers or more, the width of the first end 310 is 2 micrometers or more, the width of the second end 320 is 4 micrometers or more, and on one side of the isolation structure 300, the second distance L1 between the edge of the effective functional area 202 and the edge of the second end 320 as orthogonally projected on the substrate 100 is 3 micrometers or more, thereby providing a subpixel gap of 10 micrometers or more. For example, the second tilt angle is 40 to 70 degrees.

[0347] 5, in a cross section perpendicular to the substrate 100, the acute angle formed by a line P4 defined by the edge of the second electrode 230 and the edge of the second end 320 on one side of the isolation structure 300 and the plane of the substrate 100 is a first tilt angle Θ1, which is smaller than the second tilt angle Θ2. The acute angle formed by a line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., line P0) is smaller than the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be 20 to 70 degrees.

[0348] 5, the acute angle formed by a straight line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the plane of the substrate 100 (e.g., a line P0 included therein) is equal to the first tilt angle Θ1, and the acute angle formed by a straight line P6 defined by the edge of the surface of the first end 310 facing the substrate 100 and the edge of the second end 320 and the plane of the substrate 100 is equal to the second tilt angle Θ2. That is, L1=H / tan Θ2 (the calculation of H in this formula does not take into account the layer thicknesses of the first electrode and the light-emitting functional layer) and L2=h1 / tan Θ1. For example, the width of the first end 310 is 2 micrometers, the width of the second end 320 is 4 micrometers, and the second distance L1 between the edge of the effective functional area 202 and the edge of the second end 320, as projected on the substrate 100, on one side of the isolation structure 300 is 3 micrometers, thereby resulting in a subpixel gap of 10 micrometers. Furthermore, for example, the average width of the subpixels in each pixel is 2.8 micrometers, thereby resulting in a pixel array density of 661 PPI or 992 PPI.

[0349] 2 and 14, the widths of the first subpixel B, the second subpixel G, and the third subpixel R are all 2.8 micrometers, or the width of the first subpixel B is greater than 2.8 micrometers and the width of the third subpixel R is less than 2.8 micrometers, resulting in an average width of the first subpixel B, the second subpixel G, and the third subpixel R of 2.8 micrometers. In the above design, the width (called pitch) of each pixel (including the first subpixel B, the second subpixel G, and the third subpixel R) is 38.4 micrometers, resulting in a pixel array density of 661 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and will not be repeated here.

[0350] 15, the widths of the second subpixel G and the third subpixel R are both 2.8 micrometers, or the widths of the second subpixel G and the third subpixel R decrease in order, with the width of the first subpixel being greater than 2.8 micrometers and the widths of the second subpixel and the third subpixel being equal but less than 2.8 micrometers. In the above design, the width (referred to as "pitch") of each pixel P (including the first subpixel B, the second subpixel G, and the third subpixel R) is 25.6 micrometers, thereby achieving a pixel array density of 992 PPI. Regarding the design of the average width of the subpixels, please refer to the relevant descriptions in the previous embodiments and will not be repeated here.

[0351] Note that in the embodiments of the present disclosure, the improvement in pixel density is based on the existing manufacturing process conditions, i.e., the PPI is further improved under the assumption that the existing process conditions, such as lithography accuracy and alignment accuracy (e.g., lithography alignment accuracy), remain unchanged. As technology advances, these process conditions may improve, in which case the pixel density according to the embodiments of the present disclosure may also be further improved. For example, the gap between the first electrodes, the width of the support portion, and the width of the subpixel (or active functional area) may be further reduced.

[0352] For example, in an embodiment of the present disclosure, the display panel may include an encapsulating layer covering the display functional layer. The encapsulating layer can isolate the light-emitting elements in the display functional layer and also has a planarizing function, making it easier to provide functional structures such as a touch control functional layer, a polarizer, a lens layer, and a cover plate on the encapsulating layer. For example, the encapsulating layer may include a first encapsulating layer (already mentioned in the previous embodiment), a second encapsulating layer, and a third encapsulating layer stacked in order on the display functional layer. The first and third encapsulating layers are all inorganic layers, which are highly dense and can isolate water, oxygen, etc. The second encapsulating layer is an organic encapsulating layer that is thick and performs a planarizing function.

[0353] The above summarizes some basic designs with isolation structures and the principles by which they improve the pixel density (PPI) of display panels. However, in actual applications, when an isolation structure is provided, the isolation structure may have various design shapes, and other designs may also exist within the display panel, such as the first encapsulation layer described above and the optical function unit and protective layer described below. Therefore, taking into account the various specific designs of display panels, it is necessary to ensure the functionality of the specific structures involved and to consider the minimum dimension of the inter-subpixel width of the display panel (related to the width between the two first openings of the isolation structure) to understand design methods for achieving the highest possible pixel density for different designs of display panels. Details are provided below.

[0354] At least one embodiment of the present disclosure provides a display panel. As shown in FIGS. 16 and 17 , the display panel includes a substrate 100, an isolation structure 300, a display function layer, and a first encapsulation layer 510 located on the substrate 100. The isolation structure 300 is located on the substrate 100 and has a first end 310 and a second end 320. The second end 320 is located on the side of the first end 310 away from the substrate 100, and the orthogonal projection of the first end 310 on the substrate 100 is inside the orthogonal projection of the second end 320 on the substrate 100. The isolation structure defines a plurality of first openings 301. The display function layer is located on the substrate 100 and includes a plurality of light-emitting elements 200 located within the corresponding first openings 301. The light-emitting elements 200 include a first electrode 210, a light-emitting function layer 220, and a second electrode 230 stacked on the substrate 100, and the first openings 301 position the corresponding light-emitting elements 200. The first sealing layer 510 is on the side of the display function layer that faces away from the substrate 100. The orthogonal projection of a portion of an edge portion of at least a portion of the layer of the light-emitting element 200 on the substrate 100 is inside the orthogonal projection of the second end 320 on the substrate 100. The relationship between each structure of the display panel and the functions they perform can be referred to the related descriptions in the above-mentioned embodiments, and therefore will not be repeated here.

[0355] At least some of the layers of the light-emitting device 200 may include the light-emitting functional layer according to the above-described embodiments, or may include the light-emitting functional layer and the second electrode according to the above-described embodiments. The edge portions of the at least some of the layers may refer to portions of the layers where the thickness distribution is uneven. For example, during the entire layer deposition process, the deposition material ejected from the deposition equipment when forming the edge portions of different layers is shielded to some extent by the isolation structures, and the dimensions of the edge portions of different layers vary depending on the deposition angle and the position of the layer.

[0356] For example, as shown in FIGS. 16 and 17 , the thickness of the edge portions of at least some layers of the light-emitting device 200 gradually decreases from the center to the corresponding edge of the light-emitting device 200. Some layers in the light-emitting device, such as the light-emitting functional layer 220 and the second electrode 230, are formed by deposition with the assistance of the isolation structures 300, which limit the deposition range of the deposition material. Therefore, the thickness of these layers at their edges decreases as they approach the isolation structures. Correspondingly, the thickness of the light-emitting device 200 at the edge of the second end 320 is smaller than the thickness of its central portion. In view of this, by designing the height of the isolation structures 300 (e.g., the first height described below), the sealing effect of the first encapsulation layer 510 can be ensured. By providing the isolation structures 300 with a relatively low height, the width of the isolation structures 300 between adjacent first openings 301 can be further reduced, thereby improving the aperture ratio, pixel density, etc. of the display panel.

[0357] As shown in Figures 14 and 15, the display panel includes a plurality of subpixels, each having two opposing long sides Lc and two opposing short sides Sh. Some subpixels have edge portions only on the short sides Sh where the thickness gradually decreases from the center of the light-emitting element to the corresponding edge, but do not have edge portions on the long sides Lc where the thickness gradually decreases from the center of the light-emitting element to the corresponding edge. This can further improve the aperture ratio of the display panel. If necessary, some subpixels may have edge portions only on the long sides Lc where the thickness gradually decreases from the center of the light-emitting element to the corresponding edge, but not have edge portions on the short sides Sh where the thickness gradually decreases from the center of the light-emitting element to the corresponding edge.

[0358] 16 and 17 , in a direction perpendicular to the plane of the substrate 100, the distance from the edge of the second end 320 to the edge of the first end 310 is a first height h1, and the distance between the first encapsulating layer 510 and the first electrode 210 at the center of the light emitting element 200 is a second height h2. The product of the second height h2 and the first thickness coefficient k is a first value, and the difference between the first height h1 and the first value is equal to or greater than the encapsulation safety margin. Based on the above calculation relationship, when designing a display panel, the distance between the first electrode 210 and the first encapsulating layer 510 of the light emitting element can be determined according to the layer structure between them to obtain a relatively small value for the first height h1. Under these conditions, the isolation structure 300 can help determine a small designable width between adjacent first openings 301, thereby improving the aperture ratio and PPI of the display panel.

[0359] In at least one embodiment of the present disclosure, in a front cross section of the light-emitting element, the distance in a direction perpendicular to the plane of the substrate 100 between the edge of the first end 310 and the position of the surface of the first encapsulating layer 510 facing the substrate 100 on a line that passes through the edge of the second end 320 and is perpendicular to the plane of the substrate 100 is an isolation-related height h3 (which may also be referred to as a third height). The distance in a direction perpendicular to the plane of the substrate 100 between the edge of the second end 320 and the edge of the first end 310 is a first height h1. The value of the difference between the first height h1 and the isolation-related height (third height) h3 is equal to or greater than the sealing safety margin value.

[0360] Optionally, M is a value of the ratio between the isolation-related height and the second height. Optionally, the first thickness factor is greater than or equal to M and less than 1, and M is equal to 0.5±0.2. Optionally, the first thickness factor is equal to M. Optionally, the first thickness factor is greater than or equal to 0.5 and less than 1.

[0361] The theoretical value of M is 0.5. When depositing related layers using an isolation structure, the isolation-related height h3 may differ from the theoretical value due to factors such as static electricity, the adsorption performance of the material used, and the strength of the related material. Accordingly, depending on the actual situation, the value of M may vary within the range of 0.5±0.2, and the specific value can be obtained through experimentation and experience.

[0362] Optionally, the first thickness coefficient is equal to 0.5, which is advantageous for the first height h1 to have a small value and therefore for improving the pixel density of the display panel.

[0363] The encapsulation safety margin defines the distance between the bottom surface of the first encapsulation layer and the bottom surface of the second encapsulation layer along a line passing through the edge of the second encapsulation layer and perpendicular to the substrate plane, which is required for the first encapsulation layer to meet the functional requirements. That is, the first encapsulation layer formed on the surface of the isolation structure that fills the space corresponding to the encapsulation safety margin can achieve the desired functional function, for example, satisfying requirements during subsequent processes and product use. The encapsulation safety margin may vary depending on the relevant structure, materials, and other factors, and can be determined experimentally or empirically based on the actual situation. When determining the encapsulation safety margin, if it is determined that the value of the distance X between the bottom surface of the first encapsulation layer and the bottom surface of the second encapsulation layer along a line passing through the edge of the second encapsulation layer and perpendicular to the substrate plane meets the functional requirements and there is no value smaller than the value of X that meets the requirements, then the value of X should be determined as the encapsulation safety margin. The minimum value among the values ​​determined to meet the functional requirements can be determined as the encapsulation safety margin.

[0364] For example, if the light emitting devices emit different colors of light, parameters such as the first height h1 may be designed based on the light emitting device with the largest thickness, which may be a light emitting device that emits red light.

[0365] The first encapsulation layer 510 can be formed by methods such as chemical vapor deposition, atomic layer deposition, etc. If the first height h1 is too small, the thickness of the first encapsulation layer 510 formed on the sidewall of the isolation structure will be too small to effectively protect the corresponding structure such as the light emitting element.

[0366] 16, if the first sealing layer 510 is formed on the light emitting device 200 immediately after the manufacturing process of the light emitting device 200 is completed, the sum k1 of the design thicknesses of the deposition layers (e.g., the light emitting functional layer 220 and the second electrode 230) in the light emitting device 200 is equal to the second height h2. The design thicknesses of the light emitting functional layer 220 and the second electrode 230 may be the thicknesses to be deposited at the time of design. For example, the thickness of the deposited layer at the center position of the light emitting device 200 is the largest because the isolation structure 300 does not block the deposition at this position throughout the entire deposition process. The layer thickness at this position is the design thickness of the layer.

[0367] 17, at the center of the light-emitting element 200, the first encapsulating layer 510 has a second thickness k2, which is the thickness of the first encapsulating layer 510 at a portion covering the center of the light-emitting element 200. The first encapsulating layer 510 covers the side surfaces of the light-emitting element 200 and a portion of the second end 320, and the encapsulation safety margin value is the product of the second thickness k2 and the second thickness coefficient n.

[0368] In one example, as shown in FIG. 17, at the sidewall of the isolation structure 300, the first sealing layer 510 may define a sealed chamber (S2 position) depending on the detailed structure of the isolation structure, the selection of the second thickness coefficient n, and the second thickness k2.

[0369] For example, in another example, as shown in FIG. 18, the sidewall of the isolation structure 300 can be configured to just close the chamber opening of the first sealing layer 510 depending on the detailed structure of the isolation structure, the selection of the second thickness coefficient n, and the second thickness k2.

[0370] 19, the first sealing layer 510 may define a chamber having an opening on the sidewall of the isolation structure 300 depending on the detailed structure of the isolation structure, the selection of the second thickness coefficient n, and the second thickness k2. As long as the sealing effect is ensured, the smaller the sealing safety margin value, the smaller the height of the isolation structure 300, and therefore the smaller the width between adjacent first openings (see L in FIG. 5), which can improve the pixel density of the display panel.

[0371] For example, the second thickness coefficient n can be a value between 0.2 and 2. Generally, when the second thickness coefficient n is a value less than 2, a closed chamber is formed on the side of the isolation structure 300, corresponding to the isolation structure of some structures (e.g., the isolation structure of the structure shown in FIG. 16).

[0372] For example, the second thickness coefficient n is 0.25-1.2. Furthermore, for example, the second thickness coefficient n is 0.3-0.8. In the case of an isolation structure of some structural forms (such as the isolation structure shown in FIG. 16), a large value for the second thickness coefficient n is more beneficial for ensuring the sealing effect, but does not increase the dimension between pixels. Therefore, a relatively good effect can be achieved by setting the second thickness coefficient n to a value within the range of 0.3-0.8.

[0373] In at least one embodiment of the present disclosure, as shown in Figure 20, the distance between the orthogonal projection of the edge of the second end 320 on the plane of the substrate 100 and the orthogonal projection of the edge of the first end 310 on the plane of the substrate 100 is a first width L2. In the front cross section of the light-emitting element 200, the acute angle formed by the intersection of a line passing through the edge of the second electrode 230 and the edge of the second end 320 with the plane of the substrate 100 is a first tilt angle Θ1. The first width L2 is smaller than the product of the cotangent of the first height h1 and the first tilt angle Θ1, i.e., L2

[0374] Note that if the above-described less-than relationship is replaced with an equal relationship, i.e., L2=h1*cotΘ1, second electrode 230 will just contact the side wall of the isolation portion. On the other hand, with the above-described less-than relationship, second electrode 230 can have a certain degree of rise (e.g., an upward bend described below) on the side surface of the isolation portion.

[0375] In the embodiment of the present disclosure, the edge of the first end is the outer edge closest to the substrate of the portion of the first end exposed during the manufacture of the light-emitting functional layer. In other words, the edge of the first end is the outer edge closest to the substrate of the portion of the first end exposed after all the light-emitting functional layers have been removed. The edge of the second end is the outer edge of the second end.

[0376] The "front cross section of the light-emitting element" may be a cross section perpendicular to the plane of the substrate and parallel to the direction from one first opening to another adjacent first opening, and is the normal plane of the edge line of the second end, which is perpendicular to the plane of the substrate.

[0377] ​21A , the second electrode 230 has an upwardly curved portion that is overlapped and bonded to the side surface of the first end 310. That is, in the front cross section of the light emitting element 200, the acute angle formed by the intersection of a line passing through the edge of the second electrode 230 and the edge of the second end 320 with the plane of the substrate 100 is smaller than the acute angle formed by the intersection of a line passing through the edge of the first end 310 and the edge of the second end 320 with the plane of the substrate 100. In this way, when forming the second electrode 230 by vapor deposition of a conductive material, the upwardly curved portion can be formed by vapor depositing the conductive material on the side wall of the first end 310.

[0378] 21A , the size of the upward curved portion can be designed based on dimension L7, i.e., L7 is the difference between the product of the cotangent of the acute angle Θ1 formed when the line defined by the edge of second electrode 230 and the edge of second end 320 intersects with the plane of substrate 100 and the first height h1, and the first width L2 between the edge of first end 310 and the edge of second end 320 in a direction parallel to the plane of substrate 100. Dimension L7 is equal to or greater than a safety dimension, which may be a predetermined value, ensuring a sufficient contact area between second electrode 230 and isolation structure 300 to prevent excessive contact resistance between them. For example, the safety dimension is related to factors such as the material of second electrode 230 and the magnitude of the applied current, and can be determined experimentally or empirically.

[0379] 21A, in the front cross section of the light-emitting device 200, the acute angle formed by the line passing through the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersecting with the plane of the substrate 100 is the light-emitting functional layer tilt angle, which is greater than the first tilt angle Θ1. In this way, the second electrode 230 can completely cover the light-emitting functional layer 220, and the edge of the second electrode 230 can be connected to the isolation structure 300.

[0380] For example, the first width L2 is greater than the product of the first height h1 and the cotangent of the inclination angle of the light-emitting functional layer 220. In this way, the edges of the light-emitting functional layer 220 do not extend to the sidewalls of the isolation structure 300, which prevents electrical leakage from the underside of the light-emitting functional layer 220 to the isolation structure 300 and improves light-emitting efficiency.

[0381] 16 to 21A, the light-emitting functional layer 220 includes a first functional layer 221. In the front cross section of the light-emitting device 200, the acute angle formed by a line passing through the edge of the first functional layer 221 and the edge of the second end 320 and intersecting with the plane of the substrate 100 is a second tilt angle Θ2, which is greater than the light-emitting functional layer tilt angle. In the light-emitting device 200, the first functional layer 221 is covered by other layers in the light-emitting functional layer 220 (e.g., the light-emitting layer and second functional layer described below), so that the first functional layer 221 is not directly connected to the second electrode 230. Furthermore, compared to the edge of the entire light-emitting functional layer 220, the edge of the first functional layer 221 is spaced farther from the isolation structure 300. This prevents the first functional layer 221 from connecting to the isolation structure 300, thereby preventing electrical leakage between the first functional layer 221 and the isolation structure 300 and improving luminous efficiency.

[0382] 16 to 21A, the light-emitting functional layer 220 further includes a light-emitting layer 222 and a second functional layer 223, and the light-emitting layer 222 and the second functional layer 223 cover the edges of the first functional layer 221. This design can prevent the first functional layer 221 from directly connecting to the second electrode 230 beyond the light-emitting layer 222 and the second functional layer 223, thereby ensuring the light-emitting effect of the light-emitting device 200.

[0383] In at least one embodiment of the present disclosure, as shown in Figures 16 to 21A, the second electrode 230 is formed using the isolation structure 300. Therefore, at the edge portion of the second electrode 230, the thickness of the second electrode 230 becomes thinner as it approaches the isolation structure 300.

[0384] In a front cross section of the light-emitting device 200, the thickness of the second electrode 230 at a position that passes through the edge of the first electrode 210 and is perpendicular to the plane of the substrate 100 is smaller than the thickness of the portion of the second electrode 230 that corresponds to the central position of the light-emitting device 200. In this way, a more reliable overlapping bond between the second electrode 230 and the isolation structure 300 can be achieved based on the small first tilt angle Θ1.

[0385] 20 and 21A , in at least one embodiment of the present disclosure, the orthogonal projection of the edge of the second end 320 on the substrate 100 is located between the orthogonal projection of the edge of the first electrode 210 on the substrate 100 and the orthogonal projection of the edge of the first end 310 on the substrate 100. According to this design, the edge of the first electrode 210 does not extend below the second end 320, so the height of the surface of the light-emitting device 200 at this edge is not increased due to the provision of the first electrode 210. This provides sufficient space for the first encapsulation layer 510, allowing the first encapsulation layer 510 to achieve a good encapsulation effect. Correspondingly, the overall design height of the isolation structure 300 may be reduced, thereby further reducing the width of a portion of the isolation structure 300 between adjacent first openings 301 and achieving excellent light-emitting quality.

[0386] For example, in some designs, as shown in FIG. 21B, the first electrode 210 according to FIGS. 20 and 21A can be modified so that the distribution of the first electrode 210 extends within the second interval L1, i.e., the orthogonal projection of the edge of the first electrode 210 on the substrate 100 is located between the orthogonal projection of the edge of the second end 320 on the substrate 100 and the orthogonal projection of the edge of the first end 310 on the substrate 100. Thus, in the front cross section of the light-emitting element 200, the first distance L0 between the orthogonal projection of the edge of the first electrode 210 on the substrate 100 and the orthogonal projection of the edge of the second end 320 on the substrate 100 is smaller than the product of the cotangent of the acute angle (defined as Θ) formed when the connecting line between the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects with the plane of the substrate 100 and the distance L1 in the direction perpendicular to the plane of the substrate 100 from the central part of the lower surface of the light-emitting functional layer 220 facing the substrate 100 to the edge of the second end 320. In other words, the edge of the first electrode 210 extends within the range of the second distance L1, but the thickness of the light-emitting functional layer 220 is non-uniform (gradually thinner) within the range of the second distance L1. In this way, it is possible to ensure that the first electrode 210 has a large area, and more reliably ensure that the first electrode 210 is always present in the region where the light-emitting functional layer 220 has a uniform thickness (e.g., the above-mentioned effective functional region 202), thereby improving the area of ​​the uniform light-emitting region of the light-emitting device 200 (where the light-emitting functional layer 220 has a uniform thickness), and therefore increasing the aperture ratio of the display panel. In addition, this design provides a sufficient margin for the alignment accuracy of the first electrode 210 and the isolation structure 300, and can ensure that the area and position of the uniform light-emitting region of the light-emitting device 200 will not be affected even if there is a misalignment between the first electrode 210 and the isolation structure 300.

[0387] 21A and 21C , in a front cross section of the light-emitting device 200, the product L1 of the cotangent of the acute angle (defined as Θ) formed when the connecting line between the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects with the plane of the substrate 100 and the distance from the center of the lower surface of the light-emitting functional layer 220 to the edge of the second end 320 in a direction perpendicular to the plane of the substrate 100 is less than or equal to the distance L0 between the orthogonal projection of the edge of the first electrode 210 on the substrate 100 and the orthogonal projection of the edge of the second end 320 on the substrate 100. In this way, the thickness of the light-emitting functional layer 220 is always uniform in the region of the light-emitting device 200 where the first electrode 210 is distributed, which can ensure that the wavelengths of the light emitted from the light-emitting region of the light-emitting device 200 are relatively consistent and eliminate the problem of misty light of different colors in the light-emitting device 200.

[0388] In the embodiments of the present disclosure, the isolation portion of the isolation structure 300 has a support portion 310 and a stop portion 320 as shown in Fig. 21A, or the portion between two adjacent subpixels has a substantially inverted trapezoidal cross section as shown in Fig. 22 and Fig. 23A. For detailed designs of the isolation structure 300 in these two types, please refer to the related descriptions in the above embodiments and will not be described here.

[0389] 20 and 21A, when the isolation portion of the isolation structure 300 is designed to include a support portion 310 and a stop portion 320, the width L5 of the surface of the support portion 310 facing the stop portion 320 between two adjacent first openings is equal to or greater than the safety width. In the direction from any first opening to another adjacent first opening, the width of the isolation structure 300 is not smaller than the sum of twice the first width L2, twice the distance between the orthogonal projection of the edge of the top surface of the support portion 310 on the substrate and the orthogonal projection of the edge of the bottom surface of the support portion 310 on the substrate (the difference between L6 and L2), and the safety width (the minimum value of L5). Note that the difference between L6 and L2 may be determined by the degree of inclination of the sidewall of the support portion 310. The greater the difference between L6 and L2, the easier it is for the edge of the second electrode 320 to adhere to the sidewall of the support portion 310. Furthermore, the smaller the difference between L6 and L2, the smaller the width between the two first openings of the isolation structure 300, which is advantageous for improving the pixel density of the display panel. The safety margin is the width of the surface of the support portion 310 facing the stop portion 320 that meets the functional requirements. The safety margin can be obtained by testing. When determining the safety margin, if it is determined that the value of Z meets the functional requirements but it is not determined that a value smaller than the value of Z meets the requirements, the value of Z should be recognized as the safety margin. The smallest value among multiple values ​​determined to meet the functional requirements can be recognized as the safety margin.

[0390] 21A , the isolation portion of the isolation structure 300 includes a support portion 310 and a stopper portion 320 stacked on the substrate 100. In a front cross section of the light-emitting device, the stopper portion 320 has a sloping sidewall 321, and the difference between the acute angle Θ1 formed when the connecting line between the edge of the second electrode 230 and the edge of the stopper portion 320 intersects with the plane of the substrate 100 and the acute angle A formed when the sidewall of the stopper portion 320 intersects with the plane of the substrate 100 is equal to or greater than a predetermined angle. That is, the acute angle A formed when the plane on which the sidewall of the stopper portion 320 intersects with the plane of the substrate 100 is smaller than the acute angle Θ1 formed when the connecting line between the edge of the second electrode 230 and the edge of the stopper portion 320 intersects with the plane of the substrate 100. This prevents the surface of the stopper 320 facing away from the substrate 100 from providing unwanted additional shielding to the deposition material during the deposition process. For example, the sidewall of the stopper 320 is a plane defined by the edge of the surface of the stopper 320 facing the support 310 and the edge of the surface of the stopper 320 facing away from the support 310. Furthermore, in the embodiments of the present disclosure, the predetermined angle should satisfy the requirement that, during the deposition process of all deposition layers, previous deposition material does not adhere to the sidewall, thereby unnecessarily blocking normal deposition material from reaching the corresponding position. If this condition is satisfied, the specific numerical range of the predetermined angle is not further limited.

[0391] For example, as shown in FIGS. 22 and 23A , if the portion of the isolation portion between two adjacent subpixels has a generally inverted trapezoidal shape, the width L5 of the surface of the first end 310 facing the substrate 100 between two adjacent first openings can be designed to be equal to or greater than the safety width. In the direction from any first opening to another adjacent first opening, the width of the isolation structure 300 is not smaller than the sum of twice the first width L2 and the safety width. The minimum value of the safety width can be designed depending on the process used to manufacture the isolation structure 300 (e.g., the accuracy of a process such as lithography). Similarly, the safety width is a width that satisfies functional requirements, and can be obtained through testing or experience. When determining the safety width, if it is determined that the value of Z satisfies the functional requirements but it is not determined that a value smaller than the value of Z also satisfies the requirements, the value of Z should be determined as the safety width. The minimum value among multiple values ​​determined to satisfy the functional requirements can be determined as the safety width.

[0392] In the embodiments of the present disclosure, the isolation portion of the isolation structure 300 can be directly disposed on the substrate 100, as shown in Figures 21A and 22, or the isolation portion of the isolation structure 300 and the substrate 100 can be separated by another structure (e.g., a pixel definition layer) as shown in Figure 23A. According to different designs, the calculation method of the width between the two first openings of the isolation structure 300 is different, and is specifically as follows:

[0393] In some embodiments of the present disclosure, as shown in FIGS. 21A to 21C and 22, the isolation portion of the isolation structure 300 can be directly disposed on the substrate 100, i.e., the isolation portion of the isolation structure 300 directly contacts the substrate 100.

[0394] 21B, when the isolation portion of the isolation structure 300 is in direct contact with the substrate 100 (e.g., no pixel defining layer is provided), in the front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end portion on the substrate is smaller than the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end portion intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end portion in the direction perpendicular to the plane of the substrate. That is, the first distance L0 and the second distance L1 do not overlap, and the dimension of the first distance L0 is smaller than the dimension of the second distance L1. Specifically, the first distance L0 between the orthogonal projection of the edge of the first electrode 210 on the substrate 100 and the orthogonal projection of the edge of the second end 320 on the substrate 100 is smaller than the product of the cotangent value of the acute angle formed when the connecting line between the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects with the plane of the substrate 100 and the difference between the first height h1 and the thickness of the first electrode.

[0395] 21A and 21C, when the isolation portion of the isolation structure 300 is in direct contact with the substrate 100, in the front cross section of the light-emitting device, the product of the cotangent of the acute angle formed when the connecting line between the edge of the light-emitting functional layer and the edge of the second end portion intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end portion in a direction perpendicular to the plane of the substrate is less than or equal to the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end portion on the substrate. Note that when the first and second distances L0 and L1 are equal to each other, the first distance L0 and the second distance L1 overlap each other as shown in FIG. 21A or 22. Correspondingly, when the first distance L0 and the second distance L1 are less than or equal to each other, the first distance L0 and the second distance L1 do not overlap, and the dimension of the first distance L0 is greater than the dimension of the second distance L1.

[0396] In detail, in the case of the above-mentioned equal relationship (the first distance L0 and the second distance L1 overlap), the first distance L0 between the orthogonal projection of the edge of the first electrode 210 on the substrate 100 and the orthogonal projection of the edge of the second end 320 on the substrate 100 is equal to the product of the cotangent value of the acute angle formed when the connecting line between the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects with the plane of the substrate 100, and the difference between the first height h1 and the thickness of the first electrode.

[0397] In detail, in the case of the above-mentioned less-than relationship (the dimension of the first distance L0 is greater than the dimension of the second distance L1), the product of the cotangent value of the acute angle formed when the connecting line between the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects with the plane of the substrate 100 and the first height h1 is smaller than the first distance L0 between the orthogonal projection of the edge of the first electrode 210 on the substrate 100 and the orthogonal projection of the edge of the second end 320 on the substrate 100.

[0398] 23A , the display panel may further include a pixel defining layer 330. The pixel defining layer 330 is located on the first electrode 210, on the side of the isolation portion facing the substrate 100, and defines a second opening 302. The first electrode 210 is exposed through the second opening 302, and an edge of the first end 310 is located within the upper surface of the pixel defining layer 330 that faces away from the substrate 100.

[0399] 23B , in the front cross section of the light emitting element 200, the distance L0 between the orthogonal projection on the substrate 100 of the edge of the first electrode 210 exposed through the second opening 302 and the orthogonal projection on the substrate 100 of the edge of the second end 320 is smaller than the product L1 of the cotangent of the acute angle Θ formed when the connecting line between the edge of the light emitting functional layer 220 and the edge of the second end 320 intersects with the plane of the substrate 100 and the distance from the center of the lower surface of the light emitting functional layer 220 to the edge of the second end 320 in a direction perpendicular to the plane of the substrate 100. As a result, the first electrode 210 is present in all areas where the light emitting functional layer 220 has a uniform thickness (e.g., the above-mentioned effective functional area 202), thereby improving the area of ​​the uniform light emitting area of ​​the light emitting element 200 (wherein the light emitting functional layer 220 has a uniform thickness) and the aperture ratio of the display panel.

[0400] Regarding the above relationship, when the pixel defining layer 330 is provided in the display panel, the first electrode 210 can extend to below the isolation structure 300, and correspondingly, the isolation structure 300 is provided to cover the gap between adjacent first electrodes 210. In this case, the position of the edge of the first end 310 is raised by the first electrode 210 and the pixel defining layer 330, so that the distance from the center part of the lower surface of the light-emitting functional layer 220 to the edge of the second end 320 in the direction perpendicular to the plane on which the substrate 100 is located is equal to the sum of the first height h1 and the thickness of the pixel defining layer 330. That is, in the front cross section of the light-emitting element 200, the distance L0 between the orthogonal projection on the substrate 100 of the edge of the first electrode 210 exposed through the second opening 302 and the orthogonal projection on the substrate 100 of the edge of the second end 320 is smaller than the product L1 of the cotangent value of the acute angle Θ formed when the connecting line between the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects with the plane of the substrate 100 and the sum of the first height h1 and the thickness of the pixel definition layer 330.

[0401] 23A and 23C , in the front cross section of the light-emitting device 200, the product L1 of the cotangent of the acute angle Θ formed when the connecting line between the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects with the plane of the substrate 100 and the distance from the center of the lower surface of the light-emitting functional layer 220 to the edge of the second end 320 in a direction perpendicular to the plane of the substrate 100 is less than or equal to the distance L0 between the orthogonal projection on the substrate 100 of the edge of the portion of the first electrode 210 exposed through the second opening 302 and the orthogonal projection on the substrate 100 of the edge of the second end 320. This ensures that the thickness of the light-emitting functional layer 220 is always uniform in the region of the light-emitting device 200 where the first electrode 210 is distributed, thereby ensuring that the wavelengths of the light emitted from the light-emitting region of the light-emitting device 200 are relatively consistent, eliminating the problem of misty light of different colors in the light-emitting device 200.

[0402] Regarding the above relationship, when the pixel defining layer 330 is provided on the display panel, the first electrode 210 can extend below the isolation structure 300, and the isolation structure 300 is correspondingly provided to cover the gap between adjacent first electrodes 210. In this case, the position of the edge of the first end 310 is raised by the first electrode 210 and the pixel defining layer 330, so that the product L1 of the cotangent of the acute angle Θ formed when the connecting line between the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects with the plane of the substrate 100 and the sum of the first height h1 and the thickness of the pixel defining layer 330 is less than or equal to the distance L0 between the orthogonal projection on the substrate 100 of the edge of the part of the first electrode 210 exposed through the second opening 302 and the orthogonal projection on the substrate 100 of the edge of the second end 320.

[0403] For example, the pixel defining layer 330 is an inorganic layer, and the portion of the pixel defining layer 330 covering the gap between adjacent first electrodes 210 has a recess that conforms to the gap. The surface of the first end 310 facing the substrate 100 covers the recess. The inorganic pixel defining layer 330 can be designed to have a thinner thickness, which reduces the step at the edge of the pixel defining layer 330 and improves the continuity of the second electrode 230 at the edge. This design also reduces the increase in height of the isolation structure 300 caused by the pixel defining layer 330. Furthermore, because the first end 310 completely covers the recess, the effect of the recess on the isolation structure 300 is avoided, ensuring that the height of each edge of the first end 310 is uniform.

[0404] For example, the distance between the center of the lower surface of the light-emitting functional layer 220 and the edge of the second end 320 in a direction perpendicular to the plane of the substrate 100 is equal to the sum of the first height h1 and the thickness of the pixel defining layer 330.

[0405] In the embodiments of the present disclosure, the detailed shape of the isolation structure and the presence or absence of the pixel defining layer can be selected according to the actual situation.

[0406] 22, in some cases, the isolation portion of the isolation structure 300 between two adjacent subpixels may be an inverted trapezoid, which may be disposed directly on the substrate 100 and directly contact the substrate 100. Here, the calculation method for the positional relationship between the isolation structure, the first electrode, and the light-emitting functional layer may be referred to the related description in the above-mentioned embodiments, and the description thereof will be omitted here.

[0407] 23A to 23C , in some other examples, the isolation portion of the isolation structure 300 between two adjacent subpixels has an inverted trapezoidal shape, the display panel includes a pixel defining layer 330, and the isolation portion of the isolation structure 300 is disposed on the pixel defining layer 330. Here, for the calculation method of the positional relationship between the isolation portion, the first electrode, the light-emitting functional layer, and the pixel defining layer, reference may be made to the related descriptions in the above-mentioned embodiments, and the description thereof will be omitted here.

[0408] 24, the isolation portion of the isolation structure 300 may be designed to include a support portion 310 and a stopper portion 320, and the isolation portion of the isolation structure 300 may be directly disposed on the substrate 100 (i.e., no pixel defining layer is disposed between the isolation portion and the substrate) and may be in direct contact with the substrate 100. Here, for the calculation method of the positional relationship between the isolation portion, the first electrode, and the light-emitting functional layer, please refer to the related description in the above-mentioned embodiments, and the description will be omitted here.

[0409] 25 , in some other examples, the isolation portion of the isolation structure 300 is designed to include a support portion 310 and a stop portion 320, the display panel includes a pixel defining layer 330, and the isolation portion of the isolation structure 300 is disposed on the pixel defining layer 330. Here, for the calculation method of the positional relationship between the isolation structure, the first electrode, the light-emitting functional layer, and the pixel defining layer, reference may be made to the related descriptions in the above-mentioned embodiments, and the description thereof will be omitted here.

[0410] The above describes a method for calculating the width between adjacent first openings of an isolation structure. In this calculation method, the first distance L0 is also calculated. Therefore, the distance between two subpixels, i.e., the distance between the active functional areas, can be obtained. Based on the specific pixel arrangement and the width of the subpixels in each pixel, the pixel density of the display panel can be calculated. The details are as follows:

[0411] For example, in one example, a display panel includes a plurality of pixels, each including a first subpixel, a second subpixel, and a third subpixel that emit light of sequentially increasing wavelengths, each including a different light-emitting element. The first subpixels, the second subpixels, and the third subpixels are arranged in a plurality of rows and a plurality of columns, and in each pixel, the first subpixels, the second subpixels, and the third subpixels are arranged sequentially along the row direction, and the width directions of the first subpixels, the second subpixels, and the third subpixels are all perpendicular to the column direction, and the first subpixels, the second subpixels, and the third subpixels are equal in number. In other words, a display panel may include a plurality of pixels, each including a plurality of subpixels that emit light of different wavelengths, each including a first subpixel, a second subpixel, and a third subpixel, and each including a different light-emitting element. The ratio of the number of the first subpixels, the second subpixels, and the third subpixels is 1:1:1. In each pixel, the first sub-pixel, the second sub-pixel, and the third sub-pixel are arranged in this order. This pixel arrangement may be referred to as a first type pixel arrangement. For the pixel arrangement of a display panel according to this design, please refer to the related explanation in the embodiment of FIG. 14 above, and a detailed explanation will be omitted here. Regarding the adjustment of the structural parameters of the isolation structure, the numerical range of the width between adjacent first openings of the isolation structure (see L in FIG. 5) can be changed and is not limited to being exactly the same as the related explanation in FIG. 14. For details, please refer to the explanation of the pixel density of a display panel and the calculation method for the corresponding width of the isolation structure in the embodiment described below.

[0412] For example, in another example, a display panel includes a plurality of pixels, each including a first sub-pixel, a second sub-pixel, and a third sub-pixel that emit light having wavelengths that sequentially increase, the first sub-pixel, the second sub-pixel, and the third sub-pixel each including a different light-emitting element, the first sub-pixel, the second sub-pixel, and the third sub-pixel are arranged in a plurality of columns, the width directions of the first sub-pixel, the second sub-pixel, and the third sub-pixel are all perpendicular to the column direction, the columns in which the second sub-pixel and the third sub-pixel are located are different from the columns in which the first sub-pixels are located, the second sub-pixel...

Claims

1. A display panel, a substrate, an isolation structure, a display function layer, and a first sealing layer; the isolation structure is located on the substrate and includes an isolation portion, the isolation portion having a first end and a second end, the second end being located on a side of the first end away from the substrate, an orthogonal projection of the first end being within an orthogonal projection of the second end on the substrate, and the isolation structure defines a plurality of first openings; the display function layer is located on the substrate and includes a plurality of light-emitting elements located in corresponding first openings, each of the light-emitting elements includes a first electrode, a light-emitting function layer, and a second electrode stacked on the substrate, and the first openings position the corresponding light-emitting elements; the first sealing layer is located on a side of the display function layer that is farther from the substrate, In the substrate, an orthogonal projection of a part of an edge portion of at least a part of the layer of the light-emitting element is within an orthogonal projection of the second end. A display panel characterized by:

2. a thickness of an edge portion of at least a portion of the layer of the light emitting element gradually decreases along a direction from a center portion of the light emitting element to a corresponding edge portion; Preferably, a distance from an edge of the second end portion to an edge of the first end portion along a direction perpendicular to a plane on which the substrate is located is a first height, and in a front cross section of the light emitting device, a distance between a position on a line passing through the edge of the second end portion and perpendicular to the plane on which the substrate is located, of a surface of the first sealing layer facing the substrate, and the edge of the first end portion, in a direction perpendicular to the plane on which the substrate is located, is an isolation-related height, and a difference between the first height and the isolation-related height is equal to or greater than a sealing safety margin value, Preferably, in a direction perpendicular to a plane of the substrate, a distance from an edge of the second end portion to an edge of the first end portion is the first height, a distance between the first sealing layer and the first electrode at a center position of the light emitting device is a second height, a product of the second height and a first thickness coefficient is a first value, and a difference between the first height and the first value is equal to or greater than the sealing safety margin value; Preferably, the first thickness factor is greater than or equal to M and less than 1, M being 0.5±0.2; Preferably, M is the ratio of the isolation-related height to the second height, and more preferably, the first thickness coefficient is equal to M.

2. The display panel according to claim 1.

3. a thickness of the first sealing layer at a central position of the light emitting element is a second thickness; the first encapsulation layer covers the light-emitting element and a portion of a side surface of the second end, the encapsulation safety margin value being equal to the product of the second thickness and a second thickness factor; Preferably, the first sealing layer forms a closed chamber at a side of the isolation structure, and the second thickness factor is 0.2-2; Preferably, the second thickness factor is 0.25-1.2, more preferably, the second thickness factor is 0.3-0.8; Preferably, the display panel includes a plurality of sub-pixels, each of which has two long sides facing each other and two short sides facing each other, and some of the sub-pixels have, only on the short sides, edge portions whose thickness gradually decreases along a direction from a center of the light-emitting element to a corresponding edge, and do not have, on the long sides, edge portions whose thickness gradually decreases along a direction from a center of the light-emitting element to a corresponding edge.

3. The display panel according to claim 2.

4. a distance between an orthogonal projection of an edge of the second end portion and an orthogonal projection of an edge of the first end portion on a plane on which the substrate is located is a first width; In a front cross section of the light emitting device, an acute angle formed by a line passing through an edge of the second electrode and an edge of the second end portion intersecting with a plane on which the substrate is located is a first tilt angle, and the first width is smaller than a product of the first height and a cotangent value of the first tilt angle; Preferably, the second electrode has an upwardly bent portion that is overlapped and joined to a side surface of the first end portion, Preferably, in a front cross section of the light-emitting element, an acute angle formed by a line passing through an edge of the light-emitting functional layer and an edge of the second end portion intersecting with a plane on which the substrate is located is a light-emitting functional layer inclination angle, and the light-emitting functional layer inclination angle is greater than the first inclination angle; Preferably, the first width is greater than the product of the first height and the cotangent of the inclination angle of the light-emitting functional layer; Preferably, the light-emitting functional layer includes a first functional layer, and in a front cross section of the light-emitting device, an acute angle formed by a line passing through an edge of the first functional layer and an edge of the second end portion intersecting with a plane of the substrate is a second tilt angle, and the second tilt angle is larger than the light-emitting functional layer tilt angle; Preferably, the light-emitting functional layer further includes a light-emitting layer and a second functional layer, and the light-emitting layer and the second functional layer cover an edge of the first functional layer; Preferably, in a front cross section of the light emitting element, the thickness of the second electrode at a position passing through an edge of the first electrode and perpendicular to a plane on which the substrate is located is smaller than the thickness of a portion of the second electrode corresponding to a central position of the light emitting element.

4. The display panel according to claim 2 or 3.

5. On the substrate, an orthogonal projection of an edge of the second end is between an orthogonal projection of an edge of the first electrode and an orthogonal projection of an edge of the first end; Preferably, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end portion on the substrate is smaller than the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end portion intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end portion in a direction perpendicular to the plane of the substrate, or Preferably, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is equal to or less than the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end on the substrate.

5. The display panel according to claim 2, wherein the first and second electrodes are electrically connected to each other.

6. further comprising a pixel definition layer; the pixel definition layer is located on the first electrode and on a side of the isolation portion facing the substrate, and defines a second opening, the first electrode is exposed through the second opening, and an edge of the first end is within an upper surface of the pixel definition layer; Preferably, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the substrate at which the first electrode is exposed from the second opening and the orthogonal projection of the edge of the second end is smaller than the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate, Preferably, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is equal to or less than the distance between an orthogonal projection of an edge of a portion of the substrate where the first electrode is exposed from the second opening and an orthogonal projection of an edge of the second end, Preferably, the pixel definition layer is an inorganic layer, a portion of the pixel definition layer covering a gap between adjacent first electrodes has a recess conformal to the gap, and a surface of the first end portion facing the substrate covers the recess, Preferably, a distance from a central portion of the lower surface of the light-emitting functional layer to an edge of the second end in a direction perpendicular to a plane on which the substrate is located is equal to a sum of the first height and a thickness of the pixel definition layer.

5. The display panel according to claim 2, wherein the first and second electrodes are electrically connected to each other.

7. Further comprising a protective layer; the protective layer is an insulating layer, the protective layer includes a plurality of protective units, and the protective units are located between the first electrode and the first end; Preferably, the protection unit covers a sidewall of the first electrode and is spaced apart from the first end of the isolation structure, or the protection unit covers a sidewall of the first electrode and a sidewall of the first end; Preferably, a straight line perpendicular to the plane of the substrate and passing through the edge of the second end passes through the protection unit, Preferably, the protection unit is spaced apart from the first end of the isolation structure, and a distance between an edge of the second end and an edge of the first end in a direction perpendicular to a plane of the substrate is a first height; in a front cross section of the light-emitting device, a distance between a position on a line passing through the edge of the second end and perpendicular to the plane of the substrate of the surface of the first encapsulating layer facing the substrate and the edge of the first end in a direction perpendicular to the plane of the substrate is an isolation-related height, and a difference between the first height and the isolation-related height is equal to or greater than a sealing safety margin value; or a first height is a distance from an edge of the second end to an edge of the first end in a direction perpendicular to a plane of the substrate; a second height is a distance between the first encapsulating layer and the first electrode at a center position of the light emitting device; a first value is a product of the second height and a first thickness coefficient; a second value is a sum of the first value and a thickness of the protection unit; and a difference between the first height and the second value is equal to or greater than a sealing safety margin value. More preferably, the first thickness factor is greater than or equal to M and less than 1, M being 0.5±0.2, more preferably, M is the value of the ratio between the isolation-related height and the second height, more preferably, the first thickness factor is equal to M, or the protective layer covers a sidewall of the first electrode and a part of a sidewall of the first end portion, a distance between an edge of the second end portion and an edge of the first end portion in a direction perpendicular to a plane on which the substrate is located is a first height, a distance between a position on a line passing through the edge of the second end portion and perpendicular to the plane on which the substrate is located, of a surface of the first sealing layer facing the substrate in a front cross section of the light-emitting element, and the edge of the first end portion in a direction perpendicular to the plane on which the substrate is located is an isolation-related height, and a difference between the first height and the isolation-related height is equal to or greater than a sealing safety margin value, or a first height is a distance from an edge of the second end portion to an edge of the first end portion in a direction perpendicular to a plane of the substrate; a second height is a distance between the first sealing layer and the first electrode at a center position of the light emitting device; a product of the second height and a first thickness coefficient is a first value; and a difference between the first height and the first value is equal to or greater than a sealing safety margin value; More preferably, the first thickness coefficient is greater than or equal to M and less than 1, M being 0.5±0.2, more preferably, M is the value of the ratio between the isolation-related height and the second height, and more preferably, the first thickness coefficient is equal to M, Preferably, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the substrate at which the first electrode is exposed from the protective layer and the orthogonal projection of the edge of the second end is smaller than the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate, Preferably, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with a plane on which the substrate is located and the distance from a central portion of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane on which the substrate is located is equal to or less than the distance between an orthogonal projection of an edge of a portion of the substrate where the first electrode is exposed from the protective layer and an orthogonal projection of an edge of the second end, Preferably, the first end has a connection portion on a side facing the substrate, the connection portion and the first electrode being in the same layer and made of the same material; Preferably, the protection unit and the first end of the isolation structure are spaced apart, the substrate includes a first planar layer and a second planar layer on a side facing the isolation structure, the second planar layer is located between the first planar layer and the isolation structure and between the first planar layer and the first electrode, the first planar layer is an organic layer, and the second planar layer is an inorganic layer.

2. The display panel according to claim 1.

8. Further comprising at least one optically functional layer; the optical functional layer is located on a side of the light-emitting functional layer that is farther from the substrate and includes a plurality of optical functional units; Preferably, the optical function unit includes at least one of a color conversion unit, a light extraction unit, a light control unit, a filling unit, and a filter unit, or the optical function unit includes at least two of the color conversion unit, the light extraction unit, the light control unit, the filling unit, and the filter unit, Preferably, in a front cross section of the light-emitting element, an acute angle formed by a connecting line between the edge of the optical function unit and the edge of the second end portion intersecting with a plane on which the substrate is located is equal to or larger than an acute angle formed by a connecting line between the edge of the light-emitting function layer and the edge of the second end portion intersecting with a plane on which the substrate is located; Preferably, the optical function unit is located between the light-emitting function layer and the first sealing layer, and the optical function unit is provided in at least a part of the first opening, and a part of the edge portion of the optical function unit on the substrate is orthogonally projected within a part of the orthogonal projection of the second end portion, and the thickness of the edge portion of the optical function unit gradually decreases along a direction from the center of the light-emitting element to the corresponding edge.

8. The display panel according to claim 1, wherein the first and second electrodes are electrically connected to each other.

9. the standoff portion comprises a support portion and a stop portion stacked on the substrate, the support portion constituting the first end and the stop portion constituting the second end; Preferably, the first sealing layer contacts a surface of the stopper, and the first sealing layer and the stopper are made of the same material.

9. The display panel according to claim 1, wherein the first and second electrodes are electrically connected to each other.

10. The bearing portion is provided with a grid of dividing holes, the dividing holes dividing the bearing portion into a plurality of sub-bearing portions, the stoppers covering and filling the dividing holes, the bearing portion being a conductive structure, the stoppers being an insulating structure, and the second electrodes being connected to the corresponding sub-bearing portions.

10. The display panel according to claim 9.

11. The isolation portion includes a support portion and a stopper portion stacked on the substrate, and in a front cross section of the light emitting device, the stopper portion has an inclined sidewall, and a difference between an acute angle formed when a connecting line between an edge of the second electrode and an edge of the second end portion intersects with a plane of the substrate and an acute angle formed when a sidewall of the stopper portion intersects with the plane of the substrate is a predetermined angle or more.

9. The display panel according to claim 1, wherein the first and second electrodes are electrically connected to each other.

12. The first end and the second end of the isolation portion are integral with each other, and a cross-sectional outline of a portion of the isolation portion between two adjacent sub-pixels in a direction perpendicular to a plane of the substrate is an inverted trapezoid, a bottom edge of the inverted trapezoid is an edge of the second end, and a top edge of the inverted trapezoid is an edge of the first end.

9. The display panel according to claim 1, wherein the first and second electrodes are electrically connected to each other.

13. The distance between the edges of the first electrodes of the adjacent light-emitting elements that contact the corresponding light-emitting functional layers is a pixel distance, and the pixel distance is 2000-18000 nanometers, and the pixel density of the display panel is 90 PPI to 7400 PPI.

13. The display panel according to claim 1, wherein the first and second electrodes are electrically connected to each other.

14. A display panel, a substrate, an isolation structure, a display function layer, a first sealing layer, and at least one optical function layer; the isolation structure is located on the substrate and includes an isolation portion, the isolation portion having a first end and a second end, the second end being located on a side of the first end away from the substrate, an orthogonal projection of the first end being within an orthogonal projection of the second end on the substrate, and the isolation structure defines a plurality of first openings; the display function layer is located on the substrate and includes a plurality of light-emitting elements located in corresponding first openings, each of the light-emitting elements includes a first electrode, a light-emitting function layer, and a second electrode stacked on the substrate, and the first openings position the corresponding light-emitting elements; the first sealing layer is located on a side of the display function layer that is farther from the substrate, the at least one optical functional layer is located on a side of the light-emitting functional layer away from the substrate and includes a plurality of optical functional units; In the substrate, an orthogonal projection of a portion of an edge portion of at least a portion of the layer of the light-emitting element is within an orthogonal projection of the second end. A display panel characterized by:

15. a thickness of an edge portion of at least a portion of the layer of the light emitting element gradually decreases along a direction from a center portion of the light emitting element to a corresponding edge portion; Preferably, the optical function unit is located between the light emitting function layer and the first sealing layer, and the optical function unit is provided in at least a part of the first opening, Preferably, the optical function unit is located between the light-emitting function layer and the first sealing layer, and a part of the edge portion of the optical function unit on the substrate is projected within a part of the second end portion of the substrate, and the thickness of the edge portion of the optical function unit is gradually reduced along a direction from the center of the light-emitting element to the corresponding edge.

15. The display panel according to claim 14.

16. a first height is a distance from an edge of the second end to an edge of the first end in a direction perpendicular to the plane of the substrate; an isolation-related height is a distance, in a front cross section of the light-emitting element, between a position on a line passing through the edge of the second end and perpendicular to the plane of the substrate, of the surface of the first sealing layer facing the substrate, and the edge of the first end in a direction perpendicular to the plane of the substrate; and a difference between the first height and the isolation-related height is equal to or greater than a sealing safety margin value; or a first height is a distance from an edge of the second end portion to an edge of the first end portion in a direction perpendicular to a plane of the substrate; a second height is a distance between the first sealing layer and the first electrode at a center position of the light emitting device; a product of the second height and a first thickness coefficient is a first value; and a difference between the first height and the first value is equal to or greater than a sealing safety margin value; More preferably, the first thickness coefficient is greater than or equal to M and less than 1, where M is 0.5±0.2; more preferably, M is the value of the ratio between the isolation-related height and the second height; and more preferably, the first thickness coefficient is equal to M.

16. The display panel according to claim 15.

17. a thickness of the first sealing layer at a central position of the light emitting element is a second thickness; the first encapsulation layer covers the light-emitting element and a portion of a side surface of the second end, the encapsulation safety margin value being equal to the product of the second thickness and a second thickness factor; Preferably, the first sealing layer forms a closed chamber at a side of the isolation structure, and the second thickness factor is 0.2-2; Preferably, the second thickness factor is 0.25-1.2, more preferably, the second thickness factor is 0.3-0.8; Preferably, the display panel includes a plurality of sub-pixels, each of which has two long sides facing each other and two short sides facing each other, and some of the sub-pixels have, only on the short sides, edge portions whose thickness gradually decreases along a direction from a center of the light-emitting element to a corresponding edge, and do not have, on the long sides, edge portions whose thickness gradually decreases along a direction from a center of the light-emitting element to a corresponding edge.

17. The display panel according to claim 16.

18. a distance between an orthogonal projection of an edge of the second end portion and an orthogonal projection of an edge of the first end portion on a plane on which the substrate is located is a first width; In a front cross section of the light emitting device, an acute angle formed by a line passing through an edge of the second electrode and an edge of the second end portion intersecting with a plane on which the substrate is located is a first tilt angle, and the first width is smaller than a product of the first height and a cotangent value of the first tilt angle; Preferably, the second electrode has an upwardly bent portion that is overlapped and joined to a side surface of the first end portion, Preferably, in a front cross section of the light-emitting element, an acute angle formed by a line passing through an edge of the light-emitting functional layer and an edge of the second end portion intersecting with a plane on which the substrate is located is a light-emitting functional layer inclination angle, and the light-emitting functional layer inclination angle is greater than the first inclination angle; Preferably, the first width is greater than the product of the first height and the cotangent of the inclination angle of the light-emitting functional layer; Preferably, the light-emitting functional layer includes a first functional layer, and in a front cross section of the light-emitting device, an acute angle formed by a line passing through an edge of the first functional layer and an edge of the second end portion intersecting with a plane of the substrate is a second tilt angle, and the second tilt angle is larger than the light-emitting functional layer tilt angle; Preferably, the light-emitting functional layer further includes a light-emitting layer and a second functional layer, and the light-emitting layer and the second functional layer cover an edge of the first functional layer; Preferably, in a front cross section of the light emitting element, the thickness of the second electrode at a position passing through an edge of the first electrode and perpendicular to a plane on which the substrate is located is smaller than the thickness of a portion of the second electrode corresponding to a central position of the light emitting element.

18. The display panel according to claim 16 or 17.

19. On the substrate, an orthogonal projection of an edge of the second end is between an orthogonal projection of an edge of the first electrode and an orthogonal projection of an edge of the first end; Preferably, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end portion on the substrate is smaller than the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end portion intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end portion in a direction perpendicular to the plane of the substrate, Preferably, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is equal to or less than the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end on the substrate.

19. A display panel according to any one of claims 16 to 18.

20. further comprising a pixel definition layer; the pixel definition layer is located on the first electrode and on a side of the isolation portion facing the substrate, and defines a second opening, the first electrode is exposed through the second opening, and an edge of the first end is within an upper surface of the pixel definition layer; Preferably, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the substrate at which the first electrode is exposed from the second opening and the orthogonal projection of the edge of the second end is smaller than the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate, Preferably, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is equal to or less than the distance between an orthogonal projection of an edge of a portion of the substrate where the first electrode is exposed from the second opening and an orthogonal projection of an edge of the second end, Preferably, the pixel definition layer is an inorganic layer, a portion of the pixel definition layer covering a gap between adjacent first electrodes has a recess conformal to the gap, and a surface of the first end portion facing the substrate covers the recess, Preferably, a distance from a central portion of the lower surface of the light-emitting functional layer to an edge of the second end in a direction perpendicular to a plane on which the substrate is located is equal to a sum of the first height and a thickness of the pixel definition layer.

19. A display panel according to any one of claims 16 to 18.

21. Further comprising a protective layer; the protective layer is an insulating layer, the protective layer includes a plurality of protective units, and the protective units are located between the first electrode and the first end; Preferably, the protection unit covers a sidewall of the first electrode and is spaced apart from the first end of the isolation structure, or the protection unit covers a sidewall of the first electrode and a sidewall of the first end; Preferably, a straight line perpendicular to the plane of the substrate and passing through the edge of the second end passes through the protection unit, Preferably, the protection unit is spaced apart from the first end of the isolation structure, and a distance between an edge of the second end and an edge of the first end in a direction perpendicular to a plane of the substrate is a first height; in a front cross section of the light-emitting device, a distance between a position on a line passing through the edge of the second end and perpendicular to the plane of the substrate of the surface of the first encapsulating layer facing the substrate and the edge of the first end in a direction perpendicular to the plane of the substrate is an isolation-related height, and a difference between the first height and the isolation-related height is equal to or greater than a sealing safety margin value; or a first height is a distance from an edge of the second end to an edge of the first end in a direction perpendicular to a plane of the substrate; a second height is a distance between the first encapsulating layer and the first electrode at a center position of the light emitting device; a first value is a product of the second height and a first thickness coefficient; a second value is a sum of the first value and a thickness of the protection unit; and a difference between the first height and the second value is equal to or greater than a sealing safety margin value. More preferably, the first thickness factor is greater than or equal to M and less than 1, M being 0.5±0.2, more preferably, M is the value of the ratio between the isolation-related height and the second height, more preferably, the first thickness factor is equal to M, or the protective layer covers a sidewall of the first electrode and a part of a sidewall of the first end portion, a distance between an edge of the second end portion and an edge of the first end portion in a direction perpendicular to a plane on which the substrate is located is a first height, a distance between a position on a line passing through the edge of the second end portion and perpendicular to the plane on which the substrate is located, of a surface of the first sealing layer facing the substrate in a front cross section of the light-emitting element, and the edge of the first end portion in a direction perpendicular to the plane on which the substrate is located is an isolation-related height, and a difference between the first height and the isolation-related height is equal to or greater than a sealing safety margin value, or a first height is a distance from an edge of the second end portion to an edge of the first end portion in a direction perpendicular to a plane of the substrate; a second height is a distance between the first sealing layer and the first electrode at a center position of the light emitting device; a product of the second height and a first thickness coefficient is a first value; and a difference between the first height and the first value is equal to or greater than a sealing safety margin value; More preferably, the first thickness coefficient is greater than or equal to M and less than 1, M being 0.5±0.2; more preferably, M is a value of the ratio between the isolation-related height and the second height; more preferably, the first thickness coefficient is equal to M; Preferably, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the substrate at which the first electrode is exposed from the protective layer and the orthogonal projection of the edge of the second end is smaller than the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate, Preferably, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with a plane on which the substrate is located and the distance from a central portion of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane on which the substrate is located is equal to or less than the distance between an orthogonal projection of an edge of a portion of the substrate where the first electrode is exposed from the protective layer and an orthogonal projection of an edge of the second end, Preferably, the first end has a connection portion on a side facing the substrate, the connection portion and the first electrode being in the same layer and made of the same material; Preferably, the protection unit and the first end of the isolation structure are spaced apart, the substrate includes a first planar layer and a second planar layer on a side facing the isolation structure, the second planar layer is located between the first planar layer and the isolation structure and between the first planar layer and the first electrode, the first planar layer is an organic layer, and the second planar layer is an inorganic layer.

15. The display panel according to claim 14.

22. the optical functional unit is located between the second electrode and the first sealing layer, and the second height includes a thickness of a portion of the optical functional unit corresponding to a center position of the light-emitting element; Preferably, the optical function unit includes at least one of a color conversion unit, a light extraction unit, a light control unit, a filling unit, and a filter unit, or the optical function unit includes different types of the color conversion unit, the light extraction unit, the light control unit, the filling unit, and the filter unit; More preferably, the optical function unit is provided to include the color conversion unit, the light extraction unit, the light control unit, the filling unit, and the filter unit, the color conversion unit and the filling unit correspond to different light emitting elements and are arranged in parallel, the filter unit is located on the side of the corresponding color conversion unit or the filling unit that is farther from the substrate, the light control unit is located on the side of the corresponding light extraction unit that is farther from the substrate, and the color conversion unit is located on the side of the corresponding light extraction unit that is close to the substrate or on the side of the corresponding light control unit that is farther from the substrate, Preferably, in a front cross section of the light-emitting element, an acute angle formed by a connecting line between the edge of the optical function unit and the edge of the second end portion intersecting with a plane on which the substrate is located is equal to or larger than an acute angle formed by a connecting line between the edge of the light-emitting function layer and the edge of the second end portion intersecting with a plane on which the substrate is located; Preferably, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the optical function unit and the edge of the second end intersects with the plane of the substrate and the distance from the center of the lower surface of the optical function unit to the edge of the second end in a direction perpendicular to the plane of the substrate is equal to or less than the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end on the substrate, Preferably, the display panel further includes a pixel definition layer, the pixel definition layer being located on the first electrode and on a side of the isolation portion facing the substrate, and defining a second opening, the first electrode being exposed from the second opening, an edge of the first end being within an upper surface of the pixel definition layer, and a distance from a central portion of a lower surface of the optical function unit to the edge of the second end in a direction perpendicular to a plane on the substrate is equal to a difference between the sum of the first height and a thickness of the pixel definition layer and a distance from the central portion of the lower surface of the optical function unit to a central portion of the first electrode in a direction perpendicular to the plane on the substrate.

17. The display panel according to claim 16.

23. the optical function unit is located on a side of the first sealing layer that is away from the substrate, Preferably, the display panel further includes a second sealing layer located on a side of the first sealing layer that is farther from the substrate, the second sealing layer being an organic sealing layer and including a dual-purpose unit that also functions as a color conversion unit, or Preferably, the display panel further comprises a second sealing layer located on a side of the first sealing layer away from the substrate, the second sealing layer being an organic sealing layer, and the color conversion unit being located between the first sealing layer and the second sealing layer.

15. The display panel according to claim 14.

24. the light-emitting functional layers of the light-emitting element are all configured to emit a first color light beam, the optical functional unit includes the color conversion unit, the color conversion unit includes a first color conversion unit and / or a second color conversion unit, the first color conversion unit is configured to convert the first color light beam into a second color light beam, and the second color conversion unit is configured to convert the first color light beam into a third color light beam, and the first color light beam, the second color light beam and the third color light beam have wavelengths that increase in order; Preferably, the first color light beam, the second color light beam, and the third color light beam emit blue light, green light, and red light, respectively; the material of the first color conversion unit includes a G-quantum dot material; and the material of the second color conversion unit includes an R-quantum dot material; Preferably, the light-emitting functional layer has a laminated structure, Preferably, the light-emitting functional layer has a fluorescent or phosphorescent light-emitting type, Preferably, the color conversion unit is located on a side of the second electrode that is farther from the substrate, Preferably, an edge of the color conversion unit is spaced apart from the isolation structure.

24. The display panel according to claim 22 or 23.

25. the light-emitting functional layer of the light-emitting element includes at least two light-emitting layers, at least one of the light-emitting layers is configured to emit a first color light ray, and at least one of the light-emitting layers is configured to emit a second color light ray; the color conversion unit includes a first color conversion unit and / or a second color conversion unit, the first color conversion unit is configured to convert the first color light ray into the second color light ray, and the second color conversion unit is configured to convert the first color light ray into a third color light ray, and the first color light ray, the second color light ray, and the third color light ray have increasing wavelengths, or the first color light ray, the third color light ray, and the second color light ray have increasing wavelengths; Preferably, the first color light beam, the second color light beam, and the third color light beam emit blue light, green light, and red light, respectively; the material of the first color conversion unit includes a G-quantum dot material; and the material of the second color conversion unit includes an R-quantum dot material; or Preferably, the first color light beam, the second color light beam, and the third color light beam emit blue light, red light, and green light, respectively; the material of the first color conversion unit includes an R-quantum dot material; and the material of the second color conversion unit includes a G-quantum dot material; Preferably, the light-emitting functional layer has a fluorescent or phosphorescent light-emitting type.

24. The display panel according to claim 22 or 23.

26. the quantum dot material comprises perovskite quantum dots and / or II-VI semiconductor quantum dots; Preferably, the perovskite quantum dots comprise at least one of CsPbX3 and CH3NH3PbX3, where X is a halogen atom, more preferably the halogen atom comprises at least one of F, Cl, Br and I; Preferably, the II-VI semiconductor quantum dots comprise at least one of CdSe / ZnS, ZnCdSe / ZnSe / ZnS, CdZnSe / CdZnS / ZnS, CdSe / CdZnSe / ZnS, CdZnSe / ZnS, InP@ZnSeS, ZnSe / ZnS, InP / ZnSe / ZnS, ZnSeTe / ZnSe / ZnSeS / ZnS, ZnSeTe / ZnSe / ZnS and ZnSe / ZnS; Preferably, the layer thickness of the color conversion unit is 500-10,000 nanometers, more preferably, the layer thickness of the color conversion unit is 600-3,000 nanometers, and even more preferably, the layer thickness of the color conversion unit is 800-1,200 nanometers.

24. A display panel according to claim 23.

27. The optical functional unit is provided to include at least the filling unit and the color conversion unit, and the color conversion unit includes a red conversion unit provided on a side of the light-emitting functional layer of the light-emitting element that emits red light, the side being away from the substrate, and a green conversion unit provided on a side of the light-emitting functional layer of the light-emitting element that emits green light, the side being away from the substrate, and the filling unit is provided on a side of the light-emitting functional layer of the light-emitting element that emits blue light, the side being away from the substrate.

27. A display panel according to any one of claims 22 to 26.

28. the optical function unit is provided to include at least the light extraction unit, and is located between the corresponding light emitting element and the corresponding color conversion unit, or is located on a side of the color conversion unit that is farther from the substrate; Preferably, the light extraction unit comprises a first extraction sublayer, or the light extraction unit comprises a first extraction sublayer, a second extraction sublayer located on a side of the first extraction sublayer facing the substrate, and a third extraction sublayer located on a side of the first extraction sublayer away from the substrate, wherein the refractive indexes of the second extraction sublayer and the third extraction sublayer are both smaller than the refractive index of the first extraction sublayer; Preferably, the refractive index of the first extraction sublayer is 2.0-2.3, and more preferably, the refractive index of the first extraction sublayer is 2.1-2.2; Preferably, the thickness of the first extraction sublayer is 45-75 nanometers, and more preferably, the thickness of the first extraction sublayer is 55-65 nanometers; Preferably, the refractive index of the second and / or third extraction sublayer is 1.4-1.8, more preferably, the refractive index of the second and / or third extraction sublayer is 1.5-1.6; Preferably, the second and / or third extraction sublayers have a thickness of 7-30 nanometers, and more preferably, the second and / or third extraction sublayers have a thickness of 10-20 nanometers.

28. A display panel according to any one of claims 22 to 27.

29. The optical function unit is provided to include at least a light control unit, and is located on a side of the corresponding light extraction unit that is farther from the substrate; Preferably, the light control unit is located between the corresponding light extraction unit and the corresponding color conversion unit; Preferably, the material of the light control unit includes a LiF material; Preferably, the thickness of the light control unit is 65-100 nanometers, and more preferably, the thickness of the light control unit is 75-85 nanometers.

29. A display panel according to any one of claims 22 to 28.

30. the isolation portion includes a support portion and a stop portion stacked on the substrate, the support portion constituting the first end portion and the stop portion constituting the second end portion; Preferably, the first sealing layer contacts a surface of the stopper, and the first sealing layer and the stopper are made of the same material.

30. A display panel according to any one of claims 14 to 29.

31. The support portion is provided with a grid-like dividing hole, the support portion is divided into a plurality of sub-support portions by the dividing hole, the stopper portion covers and fills the dividing hole, the support portion is a conductive structure, the stopper portion is an insulating structure, and the second electrode is connected to the corresponding sub-support portion.

31. The display panel of claim 30.

32. The isolation portion includes a support portion and a stopper portion stacked on the substrate, and in a front cross section of the light emitting device, the stopper portion has an inclined sidewall, and a difference between an acute angle formed when a connecting line between an edge of the second electrode and an edge of the second end portion intersects with a plane of the substrate and an acute angle formed when a sidewall of the stopper portion intersects with the plane of the substrate is a predetermined angle or more.

30. A display panel according to any one of claims 14 to 29.

33. The first end and the second end of the isolation portion are integral with each other, and a cross-sectional outline of a portion of the isolation portion between two adjacent sub-pixels in a direction perpendicular to a plane of the substrate is an inverted trapezoid, a bottom edge of the inverted trapezoid is an edge of the second end, and a top edge of the inverted trapezoid is an edge of the first end.

30. A display panel according to any one of claims 14 to 29.

34. the optical function unit is provided to include at least the filter unit and the color conversion unit, the filter unit is located on a side of the corresponding color conversion unit that is farther from the substrate, and a blocking portion is provided between the adjacent filter units; Preferably, the filter unit is located between the corresponding color conversion unit and the first sealing layer, and a part of the isolation structure also serves as the blocking portion.

34. A display panel according to any one of claims 22 to 33.

35. The distance between the edges of the first electrodes of the adjacent light-emitting elements that contact the corresponding light-emitting functional layers is a pixel distance, and the pixel distance is 2000-18000 nanometers, and the pixel density of the display panel is 90 PPI to 7400 PPI.

35. A display panel according to any one of claims 14 to 34.

36. A display panel, a substrate, an isolation structure, a display function layer, and a first sealing layer; the isolation structure is located on the substrate and includes an isolation portion, the isolation portion having a first end and a second end, the second end being located on a side of the first end away from the substrate, an orthogonal projection of the first end being within an orthogonal projection of the second end on the substrate, and the isolation structure defines a plurality of first openings; the display function layer is located on the substrate and includes a plurality of light-emitting elements located in corresponding first openings, each of the light-emitting elements includes a first electrode, a light-emitting function layer, and a second electrode stacked on the substrate, and the first openings position the corresponding light-emitting elements; The first sealing layer is located on a side of the display function layer away from the substrate, and a distance from an edge of the second end to an edge of the first end in a direction perpendicular to a plane on which the substrate is located is a first height. In a front cross section of the light-emitting element, a distance between a position on a line on a surface of the first sealing layer facing the substrate that passes through the edge of the second end and is perpendicular to the plane on which the substrate is located and the edge of the first end in a direction perpendicular to the plane on which the substrate is located is an isolation-related height, and a difference between the first height and the isolation-related height is equal to or greater than a sealing safety margin value. A display panel characterized by:

37. At the center position of the light-emitting element, a distance between the first sealing layer and the first electrode is a second height, a product of the second height and a first thickness coefficient is a first value, a difference between the first height and the first value is equal to or greater than a sealing safety margin value, the first thickness coefficient is equal to or greater than M and less than 1, M is 0.5±0.2, more preferably M is a ratio value between the isolation-related height and the second height, more preferably the first thickness coefficient is equal to M.

37. The display panel of claim 36.

38. a thickness of the first sealing layer at a central position of the light emitting element is a second thickness; the first encapsulation layer covers the light-emitting element and a portion of a side surface of the second end, the encapsulation safety margin value being equal to the product of the second thickness and a second thickness factor; Preferably, the second thickness factor is 0.2-2, more preferably, the second thickness factor is 0.25-1.2, and even more preferably, the second thickness factor is 0.3-0.

8.

37. The display panel of claim 36.

39. a distance between an orthogonal projection of an edge of the second end portion and an orthogonal projection of an edge of the first end portion on a plane on which the substrate is located is a first width; In a front cross section of the light emitting device, an acute angle formed by a line passing through an edge of the second electrode and an edge of the second end portion intersecting with a plane on which the substrate is located is a first tilt angle, and the first width is smaller than a product of the first height and a cotangent value of the first tilt angle; Preferably, in a front cross section of the light-emitting element, an acute angle formed by a line passing through an edge of the light-emitting functional layer and an edge of the second end portion intersecting with a plane on which the substrate is located is a light-emitting functional layer inclination angle, and the light-emitting functional layer inclination angle is greater than the first inclination angle; Preferably, the first width is greater than the product of the first height and the cotangent of the inclination angle of the light-emitting functional layer; Preferably, the light-emitting functional layer includes a first functional layer, and in a front cross section of the light-emitting device, an acute angle formed by a line passing through an edge of the first functional layer and an edge of the second end portion intersecting with a plane of the substrate is a second tilt angle, and the second tilt angle is larger than the light-emitting functional layer tilt angle; Preferably, the light-emitting functional layer further includes a light-emitting layer and a second functional layer, and the light-emitting layer and the second functional layer cover an edge of the first functional layer.

39. A display panel according to any one of claims 36 to 38.

40. On the substrate, an orthogonal projection of an edge of the second end is between an orthogonal projection of an edge of the first electrode and an orthogonal projection of an edge of the first end; Preferably, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end portion on the substrate is smaller than the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end portion intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end portion in a direction perpendicular to the plane of the substrate, Preferably, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is equal to or less than the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end on the substrate.

40. A display panel according to any one of claims 36 to 39.

41. further comprising a pixel definition layer; the pixel definition layer is located on the first electrode and on a side of the isolation portion facing the substrate, and defines a second opening, the first electrode is exposed through the second opening, and an edge of the first end is within an upper surface of the pixel definition layer; Preferably, in a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the substrate at which the first electrode is exposed from the second opening and the orthogonal projection of the edge of the second end is smaller than the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate, Preferably, in a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end intersects with the plane of the substrate and the distance from the center of the lower surface of the light-emitting functional layer to the edge of the second end in a direction perpendicular to the plane of the substrate is equal to or less than the distance between an orthogonal projection of an edge of a portion of the substrate where the first electrode is exposed from the second opening and an orthogonal projection of an edge of the second end, Preferably, the pixel definition layer is an inorganic layer, a portion of the pixel definition layer covering a gap between adjacent first electrodes has a recess conformal to the gap, and a surface of the first end portion facing the substrate covers the recess, Preferably, a distance from a central portion of the lower surface of the light-emitting functional layer to an edge of the second end in a direction perpendicular to a plane on which the substrate is located is equal to a sum of the first height and a thickness of the pixel definition layer.

41. A display panel according to any one of claims 36 to 40.

42. the isolation portion includes a support portion and a stop portion stacked on the substrate, the support portion constituting the first end portion and the stop portion constituting the second end portion; Preferably, the first sealing layer contacts a surface of the stopper, and the first sealing layer and the stopper are made of the same material.

42. A display panel according to any one of claims 36 to 41.

43. The support portion is provided with a grid-like dividing hole, the support portion is divided into a plurality of sub-support portions by the dividing hole, the stopper portion covers and fills the dividing hole, the support portion is a conductive structure, the stopper portion is an insulating structure, and the second electrode is connected to the corresponding sub-support portion.

43. The display panel of claim 42.

44. The isolation portion includes a support portion and a stopper portion stacked on the substrate, and in a front cross section of the light emitting device, the stopper portion has an inclined sidewall, and a difference between an acute angle formed when a connecting line between an edge of the second electrode and an edge of the second end portion intersects with a plane of the substrate and an acute angle formed when a sidewall of the stopper portion intersects with the plane of the substrate is a predetermined angle or more.

42. A display panel according to any one of claims 36 to 41.

45. The first end and the second end of the isolation portion are integral with each other, and a cross-sectional outline of a portion of the isolation portion between two adjacent sub-pixels in a direction perpendicular to a plane of the substrate is an inverted trapezoid, a bottom edge of the inverted trapezoid is an edge of the second end, and a top edge of the inverted trapezoid is an edge of the first end.

42. A display panel according to any one of claims 36 to 41.

46. The distance between the edges of the first electrodes of the adjacent light-emitting elements that contact the corresponding light-emitting functional layers is a pixel distance, and the pixel distance is 2000-18000 nanometers, and the pixel density of the display panel is 90 PPI to 7400 PPI.

46. ​​A display panel according to any one of claims 36 to 45.

47. A display panel, a substrate; an isolation structure and a display function layer located on the substrate; The isolation structure includes an isolation portion, and the isolation structure defines a plurality of first openings. The display function layer includes a plurality of light-emitting elements located in the corresponding first openings, and the light-emitting elements include a first electrode, a light-emitting function layer, and a second electrode stacked on the substrate. A distance between edges of the first electrodes of adjacent light-emitting elements that contact the corresponding light-emitting function layers is a pixel interval, and the pixel interval is 2000-18000 nanometers. A display panel characterized by:

48. a thickness of an edge portion of at least a portion of the layer of the light emitting element gradually decreases along a direction from a center portion of the light emitting element to a corresponding edge portion; In a front cross section of the light-emitting element, the cross-sectional profile of the isolation portion between two adjacent subpixels is an inverted trapezoid, and the width of the apex of the inverted trapezoid is 1258-16000 nanometers; or the isolation portion comprises a support portion and a stop portion stacked on the substrate, the support portion constituting the first end portion and the stop portion constituting the second end portion, and in a front cross section of the light-emitting element, the cross-sectional outlines of the support portion and the stop portion between two adjacent subpixels are both regular trapezoids, the edge of the second end portion is the edge of the surface of the stop portion facing the substrate, the edge of the first end portion is the edge of the surface of the support portion facing the substrate, the width of the base of the regular trapezoid corresponding to the support portion is 1258-17000 nanometers, and the width of the top side of the regular trapezoid corresponding to the support portion is 880-15000 nanometers.

48. The display panel of claim 47.

49. It includes a plurality of pixels, each of the pixels includes a plurality of sub-pixels that emit light rays of different wavelengths, the plurality of sub-pixels of the pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel, and the first sub-pixel, the second sub-pixel, and the third sub-pixel each have a different light-emitting element; Preferably, the ratio of the number of the first sub-pixels, the second sub-pixels and the third sub-pixels is 1:1:1; Preferably, in each pixel, the first sub-pixel, the second sub-pixel, and the third sub-pixel are arranged in parallel in a first type pixel arrangement form, or in each pixel, the second sub-pixel and the third sub-pixel are arranged in one column / row and in parallel to the first sub-pixel in a second type pixel arrangement form.

49. A display panel according to claim 47 or 48.

50. an isolation portion of the isolation structure directly contacts the substrate, a distance between an orthogonal projection of an edge of the second end portion and an orthogonal projection of an edge of the first end portion on a plane where the substrate is located is a first width, a distance between an edge of a portion of the first electrode that contacts the light-emitting functional layer of the same light-emitting element and an orthogonal projection of an edge of the second end portion on a plane where the substrate is located is a first interval, and the edge of the first interval is an edge of a portion of the first electrode that contacts the light-emitting functional layer of the same light-emitting element, the pixel spacing is 2000-2200 nanometers, the first spacing is 0-1017 nanometers, and the first width is 148-417 nanometers; or the pixel spacing is 2200-2500 nanometers, the first spacing is 0-1050 nanometers, and the first width is 166-450 nanometers; or the pixel spacing is 2500-3200 nanometers, the first spacing is 0-1090 nanometers, and the first width is 185-490 nanometers; or the pixel spacing is 3200-4000 nanometers, the first spacing is 0-1130 nanometers, and the first width is 203-530 nanometers; or the pixel spacing is 4000-6000 nanometers, the first spacing is 0-1170 nanometers, and the first width is 221-570 nanometers; or the pixel spacing is 6000-9000 nanometers, the first spacing is 0-1210 nanometers, and the first width is 240-610 nanometers; or the pixel spacing is 9000-13000 nanometers, the first spacing is 0-1300 nanometers, and the first width is 259-700 nanometers; or The pixel interval is 13,000-18,000 nanometers, the first interval is 0-1,410 nanometers, and the first width is 277-810 nanometers.

50. The display panel of claim 49.

51. In a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end portion intersects with a plane on which the substrate is located and the distance from a central portion of a lower surface of the light-emitting functional layer to the edge of the second end portion in a direction perpendicular to the plane on which the substrate is located is equal to or less than the distance between an orthogonal projection of the edge of the first electrode and an orthogonal projection of the edge of the second end portion on the substrate, the pixel spacing is 2000-2200 nanometers and the first spacing is 148-567 nanometers; or the pixel spacing is 2200-2500 nanometers and the first spacing is 166-650 nanometers; or the pixel spacing is 2500-3200 nanometers and the first spacing is 185-740 nanometers; or the pixel spacing is 3200-4000 nanometers and the first spacing is 203-830 nanometers; or the pixel spacing is 4000-6000 nanometers and the first spacing is 221-920 nanometers; or the pixel spacing is 6000-9000 nanometers and the first spacing is 240-1010 nanometers; or the pixel spacing is 9000-13000 nanometers and the first spacing is 259-1150 nanometers; or The pixel interval is 13,000-18,000 nanometers, and the first interval is 277-1,310 nanometers.

51. The display panel of claim 50.

52. a first height is a distance from an edge of the second end to an edge of the first end in a direction perpendicular to a plane of the substrate, the first height being 400-2200 nanometers; Preferably, the pixel spacing is 2000-2200 nanometers and the first height is 400-800 nanometers, or the pixel spacing is 2200-2500 nanometers and the first height is 450-850 nanometers; or the pixel spacing is 2500-3200 nanometers and the first height is 500-900 nanometers; or the pixel spacing is 3200-4000 nanometers and the first height is 550-950 nanometers; or the pixel spacing is 4000-6000 nanometers and the first height is 600-1000 nanometers; or the pixel spacing is 6000-9000 nanometers and the first height is 650-1100 nanometers; or the pixel spacing is 9000-13000 nanometers and the first height is 700-1200 nanometers; or The pixel interval is 13,000-18,000 nanometers, and the first height is 750-2,200 nanometers.

52. The display panel of claim 51.

53. In a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the first electrode and the orthogonal projection of the edge of the second end portion on the substrate is smaller than the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end portion intersects with the plane of the substrate and the distance from the central part of the lower surface of the light-emitting functional layer to the edge of the second end portion in a direction perpendicular to the plane of the substrate, the pixel spacing is 2000-2200 nanometers, the first spacing is 0-415 nanometers, and the first width is 148-417 nanometers; or the pixel spacing is 2200-2500 nanometers, the first spacing is 0-446 nanometers, and the first width is 166-450 nanometers; or the pixel spacing is 2500-3200 nanometers, the first spacing is 0-484 nanometers, and the first width is 185-490 nanometers; or the pixel spacing is 3200-4000 nanometers, the first spacing is 0-522 nanometers, and the first width is 203-530 nanometers; or the pixel spacing is 4000-6000 nanometers, the first spacing is 0-560 nanometers, and the first width is 221-570 nanometers; or the pixel spacing is 6000-9000 nanometers, the first spacing is 0-598 nanometers, and the first width is 240-610 nanometers; or the pixel spacing is 9000-13000 nanometers, the first spacing is 0-685 nanometers, and the first width is 259-700 nanometers; or The pixel interval is 13,000-18,000 nanometers, the first interval is 0-790 nanometers, and the first width is 277-810 nanometers.

51. The display panel of claim 50.

54. Further comprising at least one optically functional layer; the optical function layer is located on a side of the light-emitting function layer away from the substrate and includes a plurality of optical function units located within the first opening, and at least a portion of the optical function units has a thickness that gradually decreases at an edge portion; In two adjacent first electrodes, the pixel interval between the edges of the first electrodes in contact with the light-emitting functional layer of the same light-emitting element is 2074-18000 nanometers.

54. A display panel according to any one of claims 50 to 53.

55. further comprising a pixel definition layer; the pixel definition layer is located on the first electrode and on a side of the isolation portion facing the substrate, and defines a second opening, the pixel definition layer covers an edge of the first electrode, the second opening exposes the first electrode, the edge of the second opening overlaps an edge of a portion of the first electrode that contacts the light-emitting functional layer of the same light-emitting element, a distance between an orthogonal projection of an edge of the second end and an orthogonal projection of an edge of the first end on a plane where the substrate is located is a first width, and a distance between an edge of a portion of the first electrode that contacts the light-emitting functional layer of the same light-emitting element and an orthogonal projection of an edge of the second end on a plane where the substrate is located is a first interval; the pixel spacing is 2200-2500 nanometers, the first spacing is 0-1050 nanometers, and the first width is 148-450 nanometers; or the pixel spacing is 2500-3200 nanometers, the first spacing is 0-1090 nanometers, and the first width is 185-490 nanometers; or the pixel spacing is 3200-4000 nanometers, the first spacing is 0-1130 nanometers, and the first width is 203-530 nanometers; or the pixel spacing is 4000-6000 nanometers, the first spacing is 0-1170 nanometers, and the first width is 221-570 nanometers; or the pixel spacing is 6000-9000 nanometers, the first spacing is 0-1210 nanometers, and the first width is 240-610 nanometers; or the pixel spacing is 9000-13000 nanometers, the first spacing is 0-1300 nanometers, and the first width is 259-700 nanometers; or The pixel interval is 13,000-18,000 nanometers, the first interval is 0-1,410 nanometers, and the first width is 277-810 nanometers.

50. The display panel of claim 49.

56. In a front cross section of the light-emitting element, the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end portion intersects with a plane on which the substrate is located and the distance from a central portion of a lower surface of the light-emitting functional layer to the edge of the second end portion in a direction perpendicular to the plane on which the substrate is located is equal to or less than the distance between an orthogonal projection of an edge of a portion of the first electrode exposed through the second opening and an orthogonal projection of an edge of the second end portion on the substrate, the pixel spacing is 2200-2500 nanometers, the first spacing is 148-650 nanometers, and the first width is 148-450 nanometers; or the pixel spacing is 2500-3200 nanometers, the first spacing is 185-740 nanometers, and the first width is 185-490 nanometers; or the pixel spacing is 3200-4000 nanometers, the first spacing is 203-830 nanometers, and the first width is 203-530 nanometers; or the pixel spacing is 4000-6000 nanometers, the first spacing is 221-920 nanometers, and the first width is 221-570 nanometers; or the pixel spacing is 6000-9000 nanometers, the first spacing is 240-1010 nanometers, and the first width is 240-610 nanometers; or the pixel spacing is 9000-13000 nanometers, the first spacing is 259-1150 nanometers, and the first width is 259-700 nanometers; or The pixel interval is 13,000-18,000 nanometers, the first interval is 277-1,310 nanometers, and the first width is 277-810 nanometers.

56. The display panel of claim 55.

57. a first height is a distance from an edge of the second end to an edge of the first end in a direction perpendicular to a plane of the substrate, the first height being 400-2200 nanometers; Preferably, the pixel spacing is 2200-2500 nanometers and the first height is 400-850 nanometers, or the pixel spacing is 2500-3200 nanometers and the first height is 500-900 nanometers; or the pixel spacing is 3200-4000 nanometers and the first height is 550-950 nanometers; or the pixel spacing is 4000-6000 nanometers and the first height is 600-1000 nanometers; or the pixel spacing is 6000-9000 nanometers and the first height is 650-1100 nanometers; or the pixel spacing is 9000-13000 nanometers and the first height is 700-1200 nanometers; or The pixel interval is 13,000-18,000 nanometers, and the first height is 750-2,200 nanometers.

57. The display panel of claim 56.

58. In a front cross section of the light-emitting element, the distance between the orthogonal projection of the edge of the portion of the first electrode exposed from the second opening and the orthogonal projection of the edge of the second end portion on the substrate is smaller than the product of the cotangent of the acute angle formed when a connecting line between the edge of the light-emitting functional layer and the edge of the second end portion intersects with the plane of the substrate and the distance from the central portion of the lower surface of the light-emitting functional layer to the edge of the second end portion in a direction perpendicular to the plane of the substrate, the pixel spacing is 2200-2500 nanometers, the first spacing is 0-446 nanometers, and the first width is 148-450 nanometers; or the pixel spacing is 2500-3200 nanometers, the first spacing is 0-484 nanometers, and the first width is 185-490 nanometers; or the pixel spacing is 3200-4000 nanometers, the first spacing is 0-522 nanometers, and the first width is 203-530 nanometers; or the pixel spacing is 4000-6000 nanometers, the first spacing is 0-560 nanometers, and the first width is 221-570 nanometers; or the pixel spacing is 6000-9000 nanometers, the first spacing is 0-598 nanometers, and the first width is 240-610 nanometers; or the pixel spacing is 9000-13000 nanometers, the first spacing is 0-685 nanometers, and the first width is 259-700 nanometers; or The pixel interval is 13,000-18,000 nanometers, the first interval is 0-790 nanometers, and the first width is 277-810 nanometers.

56. The display panel of claim 55.

59. Further comprising at least one optically functional layer; the optical function layer is located on a side of the light-emitting function layer away from the substrate and includes a plurality of optical function units located within the first opening, and at least a portion of the optical function units has a thickness that gradually decreases at an edge portion; In two adjacent first electrodes, the pixel spacing between the edges of the first electrodes in contact with the light-emitting functional layer of the same light-emitting element is 2274-18000 nanometers.

59. A display panel according to any one of claims 55 to 58.

60. A display panel, a substrate; an isolation structure and a display function layer located on the substrate; the isolation structure includes an isolation portion, the isolation structure defines a plurality of first openings, the display function layer includes a plurality of light-emitting elements positioned in corresponding first openings, and the light-emitting elements include a first electrode, a light-emitting function layer, and a second electrode stacked on the substrate; The pixel density of the display panel is 90 PPI to 7400 PPI. A display panel characterized by:

61. The thickness of the edge portion of at least some layers of the light emitting element gradually decreases along a direction from the center of the light emitting element to the corresponding edge.

61. The display panel of claim 60.

62. The pixel interval between the edges of the first electrodes of the adjacent light-emitting elements that contact the corresponding light-emitting functional layers is 2000-18000 nanometers.

62. A display panel according to claim 60 or 61.

63. In a front cross section of the light-emitting element, a cross-sectional contour of a portion of the isolation portion between two adjacent sub-pixels is an inverted trapezoid, and a bottom edge of the inverted trapezoid is an edge of the second end portion, and a top edge of the inverted trapezoid is an edge of the first end portion, or The isolation portion includes a support portion and a stop portion stacked on the substrate, the support portion constituting the first end portion and the stop portion constituting the second end portion, and in a front cross section of the light-emitting element, the cross-sectional outlines of the support portion and the stop portion at the portions between two adjacent subpixels are both regular trapezoids, the edge of the second end portion is the edge of the surface of the stop portion facing the substrate, and the edge of the first end portion is the edge of the surface of the support portion facing the substrate.

61. The display panel of claim 60.

64. It includes a plurality of pixels, each of the pixels includes a plurality of sub-pixels that emit light rays of different wavelengths, the plurality of sub-pixels of the pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel, and the first sub-pixel, the second sub-pixel, and the third sub-pixel each have a different light-emitting element; Preferably, the ratio of the number of the first sub-pixels, the second sub-pixels and the third sub-pixels is 1:1:1; Preferably, in each pixel, the first sub-pixel, the second sub-pixel, and the third sub-pixel are arranged in parallel in a first type pixel arrangement form, or in each pixel, the second sub-pixel and the third sub-pixel are arranged in one column / row and in parallel to the first sub-pixel in a second type pixel arrangement form.

64. A display panel according to any one of claims 60 to 63.

65. The pixel density of the display panel is 90-5200 PPI; Preferably, the pixel spacing is 2000-2200 nanometers and the pixel density of the display panel is 117-5200 PPI; or The pixel spacing is 2200-2500 nanometers and the pixel density of the display panel is 117-4792 PPI; or The pixel spacing is 2500-3200 nanometers, and the pixel density of the display panel is 115-4305 PPI; or The pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 115-3479 PPI; or The pixel spacing is 4000-6000 nanometers, and the pixel density of the display panel is 111-2854 PPI; or The pixel spacing is 6000-9000 nanometers, and the pixel density of the display panel is 107-1969 PPI; or The pixel spacing is 9000-13000 nanometers, and the pixel density of the display panel is 102-1344 PPI; or The pixel spacing is 13,000-18,000 nanometers, and the pixel density of the display panel is 90-944 PPI.

65. The display panel of claim 64.

66. the sub-pixels in the pixel are in the first type pixel array configuration, and the pixel density of the display panel is 170-3456 PPI; Preferably, the pixel spacing is 2000-2200 nanometers and the pixel density of the display panel is 2545-3456 PPI; or The pixel spacing is 2200-2500 nanometers, and the pixel density of the display panel is 2171-3143 PPI; or The pixel spacing is 2500-3200 nanometers, and the pixel density of the display panel is 1577-2765 PPI; or The pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 1063-2160 PPI; or The pixel spacing is 4000-6000 nanometers, and the pixel density of the display panel is 529-1728 PPI; or The pixel spacing is 6000-9000 nanometers, and the pixel density of the display panel is 353-1152 PPI; or The pixel spacing is 9000-13000 nanometers, and the pixel density of the display panel is 244-768 PPI; or The pixel spacing is 13,000-18,000 nanometers, and the pixel density of the display panel is 170-531 PPI.

66. The display panel of claim 65.

67. the sub-pixels in the pixel are in the second type pixel array configuration, and the pixel density of the display panel is 260-5200 PPI; Preferably, the pixel spacing is 2000-2200 nanometers and the pixel density of the display panel is 3818-5200 PPI; or The pixel spacing is 2200-2500 nanometers, and the pixel density of the display panel is 3256-4714 PPI; or The pixel spacing is 2500-3200 nanometers, and the pixel density of the display panel is 2366-4147 PPI; or The pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 1594-3240 PPI; or The pixel spacing is 4000-6000 nanometers, and the pixel density of the display panel is 794-2592 PPI; or The pixel spacing is 6000-9000 nanometers, and the pixel density of the display panel is 529-1728 PPI; or The pixel spacing is 9000-13000 nanometers, and the pixel density of the display panel is 366-1152 PPI; or The pixel spacing is 13,000-18,000 nanometers, and the pixel density of the display panel is 260-797 PPI.

66. The display panel of claim 65.

68. Further comprising at least one optically functional layer; the optical functional layer is located on a side of the light-emitting functional layer away from the substrate and includes a plurality of optical functional units located within the first opening, and a thickness of an edge portion of at least a part of the optical functional units is gradually reduced; In two adjacent first electrodes, the pixel spacing between the edges of the first electrodes contacting the light-emitting functional layer of the same light-emitting element is 2074-18000 nanometers, and the pixel density of the display panel is 90-5000 PPI.

68. A display panel according to any one of claims 60 to 67.

69. further comprising a pixel definition layer; the pixel definition layer is located on the first electrode and on a side of the isolation portion facing the substrate, and defines a second opening, the pixel definition layer covers an edge of the first electrode, the second opening exposes the first electrode, the edge of the second opening overlaps an edge of a portion of the first electrode that contacts the light-emitting functional layer of the same light-emitting element, a distance between an orthogonal projection of an edge of the second end and an orthogonal projection of an edge of the first end on a plane where the substrate is located is a first width, a distance between an edge of a portion of the first electrode that contacts the light-emitting functional layer of the same light-emitting element and an orthogonal projection of an edge of the second end on a plane where the substrate is located is a first interval, the sub-pixels in the pixel have the first type pixel arrangement form, and a pixel density of the display panel is 170-3143 PPI, Preferably, the pixel spacing is 2200-2500 nanometers and the pixel density of the display panel is 2171-3143 PPI; or The pixel spacing is 2500-3200 nanometers, and the pixel density of the display panel is 1577-2765 PPI; or The pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 1063-2160 PPI; or The pixel spacing is 4000-6000 nanometers, and the pixel density of the display panel is 529-1728 PPI; or The pixel spacing is 6000-9000 nanometers, and the pixel density of the display panel is 353-1152 PPI; or The pixel spacing is 9000-13000 nanometers, and the pixel density of the display panel is 244-768 PPI; or The pixel spacing is 13,000-18,000 nanometers, and the pixel density of the display panel is 170-531 PPI.

66. The display panel of claim 65.

70. further comprising a pixel definition layer; the pixel definition layer is located on the first electrode and on a side of the isolation portion facing the substrate, and defines a second opening, the pixel definition layer covers an edge of the first electrode, the second opening exposes the first electrode, the edge of the second opening overlaps an edge of a portion of the first electrode that contacts the light-emitting functional layer of the same light-emitting element, a distance between an orthogonal projection of an edge of the second end and an orthogonal projection of an edge of the first end on a plane where the substrate is located is a first width, a distance between an edge of a portion of the first electrode that contacts the light-emitting functional layer of the same light-emitting element and an orthogonal projection of an edge of the second end on a plane where the substrate is located is a first interval, the sub-pixels in the pixel have the second type pixel arrangement form, and the pixel density of the display panel is 260-4714 PPI, Preferably, the pixel spacing is 2200-2500 nanometers and the pixel density of the display panel is 3256-4714 PPI; or The pixel spacing is 2500-3200 nanometers, and the pixel density of the display panel is 2366-4147 PPI; or The pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 1594-3240 PPI; or The pixel spacing is 4000-6000 nanometers, and the pixel density of the display panel is 794-2592 PPI; or The pixel spacing is 6000-9000 nanometers, and the pixel density of the display panel is 529-1728 PPI; or The pixel spacing is 9000-13000 nanometers, and the pixel density of the display panel is 366-1152 PPI; or The pixel spacing is 13,000-18,000 nanometers, and the pixel density of the display panel is 260-797 PPI.

66. The display panel of claim 65.

71. The pixel spacing is 2000-2200 nanometers, and the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 450-1326 nanometers; or The pixel spacing is 2200-2500 nanometers, and the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 494-1700 nanometers, or The pixel spacing is 2500-3200 nanometers, and the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 563-2868 nanometers, or The pixel spacing is 3200-4000 nanometers, and the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 720-4767 nanometers, or The pixel spacing is 4000-6000 nanometers, and the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 900-11995 nanometers, or The pixel spacing is 6000-9000 nanometers, and the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 1350-18008 nanometers, or The pixel spacing is 9000-13000 nanometers, and the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 2025-25699 nanometers, or The pixel interval is 13,000 to 18,000 nanometers, and the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 4,050 to 35,846 nanometers.

71. A display panel according to any one of claims 64 to 70.

72. The aperture ratio is 6-60% 71. A display panel according to any one of claims 64 to 70.

73. Further comprising at least one optically functional layer; the optical functional layer is located on a side of the light-emitting functional layer away from the substrate and includes a plurality of optical functional units located within the first opening, and a thickness of an edge portion of at least a part of the optical functional units is gradually reduced; In two adjacent first electrodes, the pixel spacing between the edges of the first electrodes contacting the light-emitting functional layer of the same light-emitting element is 2274-18000 nanometers, and the pixel density of the display panel is 90-4560 PPI.

73. A display panel according to any one of claims 60 to 72.

74. It includes a plurality of pixels, Each pixel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel that emit light having wavelengths that gradually decrease, and the first sub-pixel, the second sub-pixel, and the third sub-pixel each have a different light-emitting element and are arranged in a plurality of rows and a plurality of columns, the first sub-pixel and the third sub-pixel are arranged in the same row and the same column, and are located in a row and a column different from the second sub-pixel, and the first sub-pixel and the third sub-pixel are arranged in a staggered manner in the row and column in which the first sub-pixel and the third sub-pixel are arranged, and the first sub-pixel a row in which the first sub-pixels are arranged and a row in which the second sub-pixels are arranged are staggered, a column in which the first sub-pixels are arranged and a column in which the second sub-pixels are arranged are staggered, each second sub-pixel is surrounded by two of the first sub-pixels and two of the third sub-pixels, and at least two sides of a rectangle formed by connecting the geometric centers of the two first sub-pixels and the two third sub-pixels surrounding the same second sub-pixel are parallel to each other; and a pixel density of the display panel is 200-7400 PPI. Preferably, the pixel spacing is 2000-2200 nanometers and the pixel density of the display panel is 249-7400 PPI; or The pixel spacing is 2200-2500 nanometers, and the pixel density of the display panel is 248-6778 PPI; or The pixel spacing is 2500-3200 nanometers, and the pixel density of the display panel is 245-6088 PPI; or The pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 243-4921 PPI; or The pixel spacing is 4000-6000 nanometers, and the pixel density of the display panel is 236-4036 PPI; or The pixel spacing is 6000-9000 nanometers, and the pixel density of the display panel is 227-2785 PPI; or The pixel spacing is 9000-13000 nanometers, and the pixel density of the display panel is 216-1901 PPI; or The pixel spacing is 13,000-16,500 nanometers, and the pixel density of the display panel is 208-1,335 PPI; or The pixel spacing is 16500-18000 nanometers, and the pixel density of the display panel is 200-1060 PPI.

65. The display panel of claim 64.

75. a geometric center of the surrounded second sub-pixel does not overlap with an intersection of two diagonals of the corresponding quadrangle, or a geometric center of the surrounded second sub-pixel overlaps with an intersection of two diagonals of the corresponding quadrangle, Preferably, the pixel spacing is 2000-2200 nanometers and the pixel density of the display panel is 1600-3000 PPI; or The pixel spacing is 2200-2500 nanometers and the pixel density of the display panel is 1400-2700 PPI; or The pixel spacing is 2500-3200 nanometers and the pixel density of the display panel is 1200-2400 PPI; or The pixel spacing is 3200-4000 nanometers, and the pixel density of the display panel is 1000-2100 PPI; or The pixel spacing is 4000-6000 nanometers and the pixel density of the display panel is 800-1800 PPI; or The pixel spacing is 6000-9000 nanometers, and the pixel density of the display panel is 600-1500 PPI; or The pixel spacing is 9000-13000 nanometers, and the pixel density of the display panel is 400-1200 PPI; or The pixel spacing is 13,000-16,500 nanometers, and the pixel density of the display panel is 300-900 PPI; or The pixel spacing is 16,500-18,000 nanometers, and the pixel density of the display panel is 200-800 PPI.

75. The display panel of claim 74.

76. A display panel, a substrate, a display function layer, and an isolation structure; the display function layer includes a plurality of light-emitting elements, each of which includes a first electrode, a light-emitting function layer, and a second electrode that are sequentially stacked on the substrate, the light-emitting function layer having an effective function area, and the light-emitting function layer includes a first function layer; the isolation structure is located on the substrate and surrounds the light-emitting functional layer; the isolation structure includes an isolation portion, the isolation portion having a first end facing the substrate and a second end away from the substrate, an orthogonal projection of the effective functional area of ​​the light-emitting functional layer on the substrate is outside the orthogonal projection of the second end of the isolation structure, and an orthogonal projection of an edge of the first functional layer on the substrate is outside the orthogonal projection of the first end and inside the orthogonal projection of the second end; In a cross section perpendicular to the substrate, an acute angle formed by a line defined by an edge of the first functional layer and an edge of the second end portion and a plane of the substrate on one side of the isolation structure is a second tilt angle; The tangent value of the acute angle formed by the line defined by the edge of the effective functional area and the edge of the second end and the plane of the substrate is equal to or less than the tangent value of the second tilt angle, and the ratio value of the difference in height between the edge of the first end and the edge of the second end in a direction perpendicular to the plane of the substrate to the distance between the edge of the first end and the edge of the second end in a direction parallel to the plane of the substrate is equal to or less than the tangent value of the second tilt angle. A display panel characterized by:

77. 1. A display device, comprising:

77. A display panel according to any one of claims 1 to 76. A display device characterized by:

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