Display panel and display device

Abstract

This disclosure provides a display panel and a display device. The display panel includes a substrate and an isolation structure, a display functional layer, and a first encapsulation layer located on the substrate. The isolation structure is located on the substrate and has a first end and a second end, the second end being located on the side of the first end away from the substrate. The orthographic projection of the first end onto the substrate lies within the orthographic projection of the second end onto the substrate. The isolation structure defines a plurality of first openings. The display functional layer includes light-emitting devices located within the first openings. The first encapsulation layer is located on the side of the display functional layer away from the substrate. A portion of the edge portion of at least a portion of the film layer of the light-emitting device lies within the orthographic projection of the second end onto the substrate. This design can reduce the width of the isolation structure between adjacent first openings.

Description

[0001] Cross-references to related applications

[0002] This disclosure claims priority to Chinese Patent Application No. 202310855866.X, filed July 13, 2023; Chinese Patent Application No. 202310356240.4, filed March 31, 2023; Chinese Patent Application No. 202311275756.2, filed September 28, 2023; and Chinese Patent Application No. 202310392090.2, filed April 9, 2023; and priority to Chinese Patent Application No. 202310759370.2, filed June 26, 2023. Priority claims to Chinese Patent Application No. 202310369642.8 filed on April 9, 2023, priority claims to Chinese Patent Application No. 202310854721.8 filed on July 12, 2023, priority claims to Chinese Patent Application No. 202310369659.3 filed on April 9, 2023, and priority claims to Chinese Patent Application No. 202310853873.6 filed on July 12, 2023, are incorporated herein by reference in their entirety. Technical Field

[0003] This disclosure relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology

[0004] Organic light-emitting diodes (OLEDs) are organic thin-film electroluminescent devices. They have attracted great attention and are widely used in electronic display products due to their advantages such as low power consumption, high brightness, wide viewing angle, high contrast, and the ability to realize flexible displays.

[0005] However, current electronic display products, limited by their structural design, face the need to further increase pixel density. Summary of the Invention

[0006] This disclosure provides a display panel including a substrate, a display functional layer, and an isolation structure. The display functional layer includes a plurality of light-emitting devices, each light-emitting device including a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked on the substrate. The light-emitting functional layer includes an effective functional area and a first functional layer. The isolation structure is located on the substrate and surrounds the light-emitting functional layer. The isolation structure includes a partition portion, which includes a first end facing the substrate and a second end facing away from the substrate. The orthographic projection of the effective functional area on the substrate is outside the orthographic projection of the second end of the isolation structure on the substrate. The orthographic projection of the edge of the first functional layer on the substrate is outside the orthographic projection of the first end on the substrate and inside the orthographic projection of the second end on the substrate. On a cross-section perpendicular to the substrate, and on the same side of the isolation structure, the acute angle formed by the straight line defined by the edge of the first functional layer and the edge of the second end with the surface where the substrate is located is the second tilt angle. The tangent of the acute angle formed by the straight line defined by the edge of the effective functional area and the edge of the second end with the surface where the substrate is located is not greater than the tangent of the second tilt angle. Furthermore, the ratio of the height difference between the edge of the first end and the edge of the second end in the direction perpendicular to the surface where the substrate is located, and the ratio of the distance between the edge of the first end and the edge of the second end in the direction parallel to the surface where the substrate is located, is not greater than the tangent of the second tilt angle. For example, the film thickness of the portion of the first functional layer located in the effective functional area is uniform.

[0007] In the above scheme, the first evaporation angle is determined by the boundary of the effective functional area and the height of the second end (its edge). The extension position of the edge of the first functional layer is determined based on the first evaporation angle and the height of the second end. Based on the principle that the first functional layer is isolated by the partition, the distance between the extension position and the second end can be inferred, so as to infer the selectable range of the edge position of the second end. In this way, the relationship between 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 evaporation angle can be constructed. Combined with the selectable range of the width dimension of the first end (there is a lower limit value), the selectable width range of the effective functional area can be deduced, and the selectable width range of the main light-emitting area (including the maximum width) can be inferred. Thus, under specific pixel density design requirements, the maximum design width of the main light-emitting area can be obtained to ensure the design area of ​​the main light-emitting area under the actual process (the width under this area can be equal to the maximum design width or slightly less than the maximum design width). In this way, while maintaining the isolation of the first functional layer by the partition, the arrangement density of the light-emitting device can be improved.

[0008] In one specific embodiment of the first aspect of this 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 partition portion includes a conductive portion, and the second electrode is connected to the conductive portion of the partition portion, the orthographic projection of the first end of the partition portion facing the substrate on the substrate is located within the orthographic projection of the second end of the partition portion away from the substrate on the substrate.

[0009] In one specific embodiment of the first aspect of this disclosure, on a cross-section perpendicular to the substrate and on the same side of the isolation structure, the acute angle formed by the straight line defining the edge of the second electrode and the edge of the second end portion with the surface where the substrate is located is a first tilt angle, the first tilt angle being smaller than a second tilt angle, and the acute angle formed by the straight line defining the edge of the effective functional area and the edge of the second end portion with the surface where the substrate is located being smaller than or equal to the first tilt angle. For example, the film thickness of the portion of the second electrode located in the effective functional area is uniform.

[0010] In the above scheme, it is possible to ensure that all film layers in the second electrode and the light-emitting functional layer are uniformly distributed in the film thickness of the effective functional area, thereby obtaining the minimum designable size of the lateral spacing between the edge of the effective functional area and the edge of the second end. Based on this, the minimum spacing between adjacent effective functional areas can be obtained, thereby maintaining the first functional layer being isolated by the partition while increasing the arrangement density of the light-emitting device (equivalent to pixel density).

[0011] In one specific embodiment of the first aspect of this disclosure, on a cross section perpendicular to the substrate and on the same side of the isolation structure, the straight line defined by the edge of the first end (e.g., the edge facing the surface of the substrate) and the edge of the second end forms an acute angle with the surface where the substrate is located that is not less than a first tilt angle and not greater than a second tilt angle.

[0012] In the above scheme, the minimum designable size of the distance between the edges of the first end and the edges of the second end in the lateral direction can be obtained, thereby further obtaining the minimum distance between adjacent effective functional areas, so as to maintain the first functional layer being isolated by the partition part while increasing the arrangement density of the light-emitting device (equivalent to pixel density).

[0013] For example, the straight line defined by the edge of the first end and the edge of the second end forms an acute angle with the surface where the substrate is located that 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 scheme, the overlap between the second electrode and the first end of the isolation structure can be guaranteed, and the overlap portion of the second electrode and the isolation structure can have a relatively large thickness to avoid poor contact or excessive resistance at the overlap.

[0015] In one specific embodiment of the first aspect of this disclosure, the acute angle formed by the straight line defined by the edge of the effective functional area and the edge of the second end with the surface where the substrate is located is equal to a first tilt angle, and the acute angle formed by the straight line defined by the edge of the first end and the edge of the second end with the surface where the substrate is located is equal to a second tilt angle.

[0016] In the above scheme, while ensuring that the film thickness of each film layer of the light-emitting device is uniform in the effective functional area, the horizontal spacing between the edge of the effective functional area and the edge of the second end, as well as the horizontal spacing between the edge of the first end and the edge of the second end, are designed to be minimized. This maximizes the reduction of the spacing between adjacent effective functional areas, thereby maintaining the first functional layer being isolated by the partition while maximizing the arrangement density (equivalent to pixel density) of the light-emitting device.

[0017] In one specific embodiment of the first aspect of this disclosure, the isolation structure is an integrated structure. For example, further, along the direction perpendicular to the substrate, the cross-sectional shape of the portion of the partition located between two adjacent sub-pixels is an inverted trapezoid, the top edge of the inverted trapezoid is located between the substrate and the bottom edge 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 this disclosure, the partition includes a support portion and a blocking portion sequentially stacked on a substrate, wherein the support portion constitutes a first end portion and the blocking portion constitutes a second end portion. For example, further, along a direction perpendicular to the substrate, the cross-sectional profile of the portion of the support portion located between two adjacent sub-pixels is a trapezoid, and the isolation structure is located at the top edge of the support portion, with the edge of the surface of the support portion facing the substrate being the edge of the first end portion. For example, even further, along a direction perpendicular to the substrate, the cross-sectional shape of the portion of the blocking portion located between two adjacent sub-pixels is a trapezoid, with the edge of the surface of the blocking portion facing the support portion being the edge of the second end portion.

[0019] In one specific embodiment of the first aspect of this 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 are located between the first electrode and the second electrode, and are stacked sequentially on the first electrode. The orthographic projection of the edge of either the light-emitting layer or the second common layer / second functional layer onto the substrate is located between the orthographic projection of the edge of the first common layer / first functional layer onto the substrate and the orthographic projection of the edge of the second electrode onto the substrate.

[0020] In one specific embodiment of the first aspect of this disclosure, the display panel may further include a pixel defining layer located between the isolation structure and the layer containing the first electrode, and covering the gap between adjacent first electrodes. The pixel defining layer defines a second opening, which is covered by a light-emitting functional layer. The second opening corresponds to and communicates with the first opening, and the orthographic projection of the second opening on the substrate lies within the orthographic projection of the corresponding first opening on the substrate.

[0021] In the above scheme, by designing a pixel defining layer, the risk of the first electrode overlapping with the adjacent isolation structure (such as the first end of which is conductive) can be eliminated, thereby enabling the first electrode to have a larger design size to ensure the design area of ​​the effective functional area.

[0022] For example, the portion of the pixel defining layer located between two adjacent sub-pixels has a trapezoidal cross-sectional shape perpendicular to the substrate, and on the same side of the isolation structure, the acute angle formed by the straight line defined by the edge of the pixel defining layer away from the surface of the substrate and the edge of the second end, and the surface where the substrate is located, is equal to the second tilt angle.

[0023] In the above scheme, the second electrode can have a relatively large film thickness on the sidewall (with slope) of the pixel defining layer, so as to avoid poor film continuity caused by the step difference of the second electrode.

[0024] For example, the portion of the pixel defining layer located between two adjacent sub-pixels has a trapezoidal cross-sectional shape perpendicular to the substrate, and on the same side of the isolation structure, the acute angle formed by the straight line defined by the edge of the pixel defining layer facing the substrate and the edge of the second end of the pixel defining layer with the surface where the substrate is located is equal to the first tilt angle.

[0025] In the above scheme, the boundary of the second opening of the pixel defining layer coincides with the boundary of the effective functional area, so that the light-emitting area of ​​the light-emitting device coincides with the effective functional area, so that the light-emitting part of the light-emitting area can have the maximum luminous efficiency, thereby improving the uniformity of light output; accordingly, this design can obtain the range of the boundary of the pixel defining layer while ensuring the maximum luminous efficiency of the light-emitting device, so as to obtain the maximum design width of the pixel defining layer (the width of the part between two adjacent first openings), which is conducive to planning the width of the pixel gap (the gap between the light-emitting areas of adjacent light-emitting devices).

[0026] In one specific embodiment of the first aspect of this disclosure, the orthographic projection of the gap between adjacent first electrodes onto the substrate coincides with the orthographic projection of the substrate-facing surface of the first end onto the substrate. This allows for the acquisition of the minimum designable width of the first end of the isolation structure, thereby enabling the acquisition of the minimum spacing between adjacent effective functional regions. This maintains the isolation of the first functional layer by the partition portion while increasing the arrangement density of the light-emitting devices (equivalent to pixel density).

[0027] In another specific embodiment of the first aspect of this disclosure, the orthographic projection of the gap between adjacent first electrodes onto the substrate lies within the orthographic projection of the substrate-facing surface of the first end onto the substrate. This ensures that the first end of the isolation structure can completely cover the grooves existing on the pixel defining layer surface caused by the gap between the first electrodes, thereby guaranteeing the fabrication yield of the isolation structure.

[0028] In one specific embodiment of the first aspect of this disclosure, the portion of the pixel defining layer covering the gap of the first electrode is conformally aligned with the gap of the first electrode, and the pixel defining layer is an inorganic material film. Thus, the pixel defining layer has a relatively small thickness, ensuring the continuity of the second electrode at the opening of the pixel defining layer, and avoiding excessive height of the isolation structure due to excessive pixel defining layer thickness (affecting the gap size of the effective functional area), thereby further improving the pixel density of the display panel or the design area of ​​the effective functional area (related to the light-emitting area and aperture ratio of the pixels).

[0029] A second aspect of this disclosure provides a display panel including a substrate and an isolation structure, a display functional layer, and a first encapsulation layer located on the substrate. The isolation structure is located on the substrate and has a first end and a second end, the second end being located on the side of the first end away from the substrate. The orthographic projection of the first end onto the substrate lies within the orthographic projection of the second end onto the substrate. The isolation structure defines a plurality of first openings. The display functional layer is located on the substrate and includes a plurality of light-emitting devices located within corresponding first openings. Each light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked on the substrate. The first openings limit the corresponding light-emitting devices. The first encapsulation layer is located on the side of the display functional layer away from the substrate. At least a portion of the edge portion of the film layer of the light-emitting device has its orthographic projection onto the substrate lying within the orthographic projection of the second end onto the substrate.

[0030] Optionally, along the direction from the center of the light-emitting device to the corresponding edge, the thickness of at least a portion of the film layer of the light-emitting device gradually decreases at the edge.

[0031] In the above scheme, the thickness of at least some of the film layers of the light-emitting device gradually decreases at the edge, indicating that these film layers are formed by vapor deposition through the isolation structure. The thickness of the light-emitting device at the edge of the second end is less than the thickness of its middle part. Based on this, the height of the isolation structure can be designed so that while ensuring the encapsulation effect of the first encapsulation layer, the isolation structure has a relatively small height, so as to further reduce the width of the isolation structure between adjacent first openings, thereby improving the aperture ratio, pixel density, etc. of the display panel.

[0032] Optionally, the display panel includes a plurality of sub-pixels, each sub-pixel having two opposing long sides and two opposing short sides. Some sub-pixels have only an edge portion with gradually decreasing thickness along the direction from the center of the light-emitting device to the corresponding edge at the short side, while the long sides do not have an edge portion with gradually decreasing thickness along the direction from the center of the light-emitting device to the corresponding edge.

[0033] In one specific embodiment of the second aspect of this disclosure, the distance from the edge of the second end to the edge of the first end in a direction perpendicular to the surface of the substrate is a first height; in the cross-section of the light-emitting device, the position of the surface of the first encapsulation layer facing the substrate on a straight line passing through the edge of the second end and perpendicular to the surface of the substrate, and the distance between the edge of the first end and the edge in a direction perpendicular to the surface of the substrate, is a partition-associated height, and the difference between the first height and the partition-associated height is not less than the encapsulation safety margin.

[0034] Along a direction perpendicular to the surface of the substrate, the distance from the edge of the second end to the edge of the first end is the first height, and at the middle position of the light-emitting device, the spacing between the first encapsulation layer and the first electrode is the second height. The product of the second height and the first thickness coefficient is the first value, and the difference between the first height and the first value is not less than the encapsulation safety margin.

[0035] In the above scheme, by adjusting the difference between the first height and the first value and the difference between the encapsulation safety margin, the encapsulation degree of the first encapsulation layer can be controlled. This ensures that the first encapsulation layer has a basic encapsulation effect while balancing the encapsulation effect of the first encapsulation layer and the height of the isolation structure. Thus, under different encapsulation requirements, the minimum width of the portion of the isolation structure between adjacent first openings can be obtained, thereby further improving the aperture ratio and pixel density of the display panel.

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

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

[0038] Optionally, M is the ratio of the partition's associated height to the second height.

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

[0040] In one specific embodiment of the second aspect of this disclosure, at the middle position of the light-emitting device, the first encapsulation layer has a second thickness, covering the light-emitting device and a portion of the side surface of the second end, and the encapsulation safety margin is equal to the product of the second thickness and a second thickness coefficient. The encapsulation safety margin is set based on the protection requirements for the light-emitting device and related film layers, thereby ensuring the basic encapsulation effect of the first encapsulation layer.

[0041] Optionally, the first encapsulation layer forms a closed cavity on the side of the isolation structure, and the second thickness coefficient is 0.2-2.

[0042] Optionally, the second thickness coefficient is 0.25-1.2; further optionally, the second thickness coefficient is 0.3-0.8.

[0043] Optionally, the display panel includes a plurality of sub-pixels, each sub-pixel having two opposing long sides and two opposing short sides. Some sub-pixels have only an edge portion with gradually decreasing thickness along the direction from the center of the light-emitting device to the corresponding edge at the short side, while the long sides do not have an edge portion with gradually decreasing thickness along the direction from the center of the light-emitting device to the corresponding edge.

[0044] In one specific embodiment of the second aspect of this disclosure, the distance between the orthographic projection of the edge of the second end onto the substrate surface and the orthographic projection of the edge of the first end onto the substrate surface is a first width. Within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line passing through the edge of the second electrode and the edge of the second end with the substrate surface is a first tilt angle. The first width is less than the product of the first height and the cotangent of the first tilt angle. The aforementioned first tilt angle can represent the evaporation angle of the second electrode during evaporation. By controlling the numerical relationship between the first width, the first height, and the evaporation angle, it can be ensured that the edge of the second electrode can overlap with the isolation structure (e.g., its first end), 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 circuits) through the isolation structure.

[0045] Optionally, the second electrode has a raised tail that overlaps the side surface of the first end.

[0046] Optionally, within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line of the edge of the light-emitting functional layer and the edge of the second end with the surface where the substrate is located is the tilt angle of the light-emitting functional layer, 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 of the tilt angle of the light-emitting functional layer.

[0048] Optionally, the light-emitting functional layer includes a first functional layer. Within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line passing through the edge of the first functional layer and the edge of the second end with the surface where the substrate is located is the second tilt angle. The second tilt angle is greater than the tilt angle of the light-emitting functional layer. Under this design, compared with the edge of the entire light-emitting functional layer, the distance between the edge of the first functional layer and the isolation structure is larger, thereby avoiding the first functional layer from being connected together through the isolation structure, thus avoiding the problem of reduced luminous 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, which cover the edge of the first functional layer. This design prevents the first functional layer from directly connecting to the second electrode by extending beyond the light-emitting layer and the second functional layer, thus ensuring the light-emitting effect of the light-emitting device.

[0050] Optionally, within the cross-section of the light-emitting device, the thickness of the second electrode at the position passing through the edge of the first electrode and perpendicular to the surface of the substrate is less than the thickness of the portion of the second electrode corresponding to the middle position of the light-emitting device.

[0051] In one specific embodiment of the second aspect of this disclosure, the orthographic projection of the edge of the second end onto the substrate lies between the orthographic projection of the edge of the first electrode onto the substrate and the orthographic projection of the edge of the first end onto the substrate. This design prevents the edge of the first electrode from extending to the edge of the second end, thus avoiding increasing the height of the surface of the light-emitting device at that edge due to the placement of the first electrode. This allows sufficient space to be reserved for the first encapsulation layer, resulting in a good encapsulation effect. Correspondingly, the overall design height of the isolation structure can be reduced, thereby further reducing the width of the isolation structure between adjacent first openings.

[0052] Optionally, on the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode on the substrate and the orthographic projection of the edge of the second end on the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate.

[0053] In the above scheme, the first electrode can be guaranteed to have a sufficiently large area. The first electrode will exist in the area where the film thickness of the light-emitting functional layer is uniform (such as the effective functional area mentioned above), thereby increasing the area of ​​the uniform light-emitting area of ​​the light-emitting device (where the film thickness of the light-emitting functional layer is uniform) and increasing the aperture ratio of the display panel. In addition, this scheme provides sufficient margin for the alignment accuracy of the first electrode and the isolation structure. Even if there is a misalignment between the positions of the first electrode and the isolation structure, the area and position of the uniform light-emitting area of ​​the light-emitting device can be guaranteed to remain unaffected.

[0054] Optionally, on the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the product of the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode on the substrate and the orthogonal projection of the edge of the second end on the substrate.

[0055] In the above scheme, the film thickness of the light-emitting functional layer is uniform in the area where the first electrode is distributed in the light-emitting device, thereby ensuring that the wavelength of the light emitted from the light-emitting area of ​​the light-emitting device is relatively consistent, so as to eliminate the problem of stray light of different colors in the light-emitting device.

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

[0057] In the above scheme, by setting a pixel delimiting layer, the first electrode can have a large area, so there is no need to consider the alignment accuracy of the first electrode and the isolation structure in the fabrication process.

[0058] Optionally, on the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode exposed from the second opening onto the substrate and the orthographic projection of the edge of the second end onto the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the surface of the substrate.

[0059] In the above scheme, a first electrode is present in the region where the film thickness of the light-emitting functional layer is uniform (such as the effective functional region mentioned above), thereby increasing the area of ​​the uniform light-emitting region of the light-emitting device (where the film thickness of the light-emitting functional layer is uniform) to increase the aperture ratio of the display panel.

[0060] Optionally, on the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the product of the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode exposed from the second opening on the substrate and the orthogonal projection of the edge of the second end on the substrate.

[0061] In the above scheme, the film thickness of the light-emitting functional layer is uniform in the area where the first electrode is distributed in the light-emitting device, thereby ensuring that the wavelength of the light emitted from the light-emitting area of ​​the light-emitting device is relatively consistent, so as to eliminate the problem of stray light of different colors in the light-emitting device.

[0062] Optionally, the pixel defining layer is an inorganic layer, and the portion of the pixel defining layer covering the gap between adjacent first electrodes has a groove conforming to the gap, with the surface of the first end facing the substrate covered by the groove.

[0063] In the above scheme, the inorganic pixel defining layer can have a small thickness, so that there is a small step difference at the edge of the pixel defining layer, thereby improving the continuity of the second electrode at the edge; in addition, the scheme can reduce the degree of increase in the height of the isolation structure caused by the setting of the pixel defining layer; furthermore, the first end completely covers the groove, thereby eliminating the influence of the groove on the isolation structure, so as to ensure that the height of the edge of the first end is the same.

[0064] Optionally, the distance between the middle portion of the lower surface of the light-emitting functional layer and 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 one specific embodiment of the second aspect of this disclosure, the display panel may further include a protective layer, which is an insulating layer, and the protective layer includes a plurality of protective units located between the first electrode and the first end.

[0066] In the above scheme, during the fabrication of the isolation structure, the first electrode can be protected by a protective layer to prevent lateral etching of the first electrode, thereby improving the yield of the light-emitting device.

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

[0068] In the above scheme, 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 further reducing the risk of the first electrode falling off the substrate.

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

[0070] Optionally,

[0071] The first end of the protection unit and the isolation structure are spaced apart. The distance between the edge of the second end and the edge of the first end in the direction perpendicular to the surface of the substrate is the first height. In the cross section of the light-emitting device, the position of the surface of the first encapsulation layer facing the substrate is located on a straight line passing through the edge of the second end and perpendicular to the surface of the substrate. The distance between the first end and the edge of the first end in the direction perpendicular to the surface of the substrate is the isolation association height. The difference between the first height and the isolation association height is not less than the encapsulation safety margin.

[0072] or,

[0073] Along a direction perpendicular to the surface of the substrate, the distance from the edge of the second end to the edge of the first end is the first height, and at the middle position of the light-emitting device, the spacing between the first encapsulation layer and the first electrode is the second height. The product of the second height and the first thickness coefficient is the first value, and the sum of the first value and the thickness of the protection unit is the second value. The difference between the first height and the second value is not less than the encapsulation safety margin. Optionally, the first thickness coefficient is greater than or equal to M and less than 1, and M is equal to 0.5 ± 0.2. More preferably, M is the ratio of the partition association height to the second height. More preferably, the first thickness coefficient is equal to M.

[0074] or,

[0075] The protective layer covers the sidewall of the first electrode and part of the sidewall of the first end. The distance between the edge of the second end and the edge of the first end in the direction perpendicular to the surface of the substrate is the first height. In the cross section of the light-emitting device, the position of the surface of the first encapsulation layer facing the substrate is located on a straight line passing through the edge of the second end and perpendicular to the surface of the substrate. The distance between the first end and the edge of the first end in the direction perpendicular to the surface of the substrate is the isolation association height. The difference between the first height and the isolation association height is not less than the encapsulation safety margin.

[0076] or,

[0077] Along a direction perpendicular to the surface of the substrate, the distance from the edge of the second end to the edge of the first end is the first height. At the center of the light-emitting device, the spacing between the first encapsulation layer and the first electrode is the second height. The product of the second height and the first thickness coefficient is the first value. The difference between the first height and the first value is not less than the encapsulation safety margin. Optionally, the first thickness coefficient is greater than or equal to M and less than 1, where M equals 0.5 ± 0.2. More preferably, M is the ratio of the partition association height to the second height. More preferably, the first thickness coefficient is equal to M.

[0078] Optionally, on the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode exposed from the protective layer onto the substrate and the orthographic projection of the edge of the second end onto the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the surface of the substrate.

[0079] In the above scheme, by adjusting the coverage area of ​​the protective unit of the protective layer on the first electrode, the first electrode can be present in the area with uniform film thickness of the light-emitting functional layer (such as the effective functional area mentioned above), thereby increasing the area of ​​the uniform light-emitting area of ​​the light-emitting device (where the film thickness of the light-emitting functional layer is uniform) and increasing the aperture ratio of the display panel; in addition, this scheme provides sufficient margin for the alignment accuracy of the first electrode and the isolation structure, so that even if there is a misalignment in the position of the first electrode and the isolation structure, the area and position of the uniform light-emitting area of ​​the light-emitting device can be guaranteed to remain unaffected.

[0080] Optionally, on the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the product of the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode exposed from the protective layer on the substrate and the orthogonal projection of the edge of the second end on the substrate.

[0081] In the above scheme, by adjusting the coverage area of ​​the protective unit of the protective layer on the first electrode, the film thickness of the light-emitting functional layer can be made uniform in the area where the first electrode is distributed in the light-emitting device. This ensures that the wavelength of the light emitted from the light-emitting area of ​​the light-emitting device is relatively consistent, thereby eliminating the problem of stray light of different colors in the light-emitting device.

[0082] Optionally, the first end includes a connecting portion facing the substrate, the connecting portion being in the same layer and made of the same material as the first electrode. In this design, the connecting portion can be fabricated simultaneously during the fabrication of the first electrode, thereby reducing the thickness requirement of the isolation structure; furthermore, the connecting portion connects the isolation structure and the substrate, thus reducing the risk of the isolation structure detaching from the substrate.

[0083] Optionally, the protection unit and the first end of the isolation structure are spaced apart. The substrate includes a first planarization layer and a second planarization layer on the side facing the isolation structure. The second planarization layer is located between the first planarization layer and the isolation structure, and between the first planarization layer and the first electrode. The first planarization layer is an organic layer, and the second planarization layer is an inorganic layer. In this embodiment, the second planarization layer is an inorganic layer, which can increase the bonding strength between the substrate, the isolation structure, and the first electrode, thereby reducing the risk of the first electrode and the isolation structure detaching from the substrate.

[0084] In one specific embodiment of the second aspect of this disclosure, the display panel may further include at least one optical functional layer located on the side of the light-emitting functional layer away from the substrate, and includes a plurality of optical functional units.

[0085] Optionally, on the cross-section of the light-emitting device, the acute angle at which the line connecting the edge of the optical functional unit to the edge of the second end intersects the surface of the substrate is greater than or equal to the acute angle at which the line connecting the edge of the light-emitting functional layer to the edge of the second end intersects the surface of the substrate.

[0086] In the above scheme, the uniformly thick portion of the optical functional unit covers the uniformly thick portion of the light-emitting functional layer, so that as much of the light emitted by the light-emitting device passes through the uniformly thick portion of the optical functional unit as possible, thereby improving the display effect of the display panel.

[0087] Optionally, the optical functional unit is located between the light-emitting functional layer and the first encapsulation layer. The optical functional unit is disposed in at least part of the first opening, and a portion of the edge portion of the optical functional unit is projected onto the substrate within the projection of the second end onto the substrate. The thickness of the edge portion of the optical functional unit gradually decreases along the direction from the center of the light-emitting device to the corresponding edge.

[0088] In the above scheme, the thickness of at least some of the film layers of the optical functional unit gradually decreases at the edge, indicating that these film layers are formed by vapor deposition through the isolation structure. The thickness of the optical functional unit at the edge of the second end is less than the thickness of its middle part. Based on this, the height of the isolation structure can be designed so that while ensuring the encapsulation effect of the first encapsulation layer, the isolation structure has a relatively small height, so as to further reduce the width of the isolation structure between adjacent first openings, thereby improving the aperture ratio, pixel density, etc. of the display panel.

[0089] Optionally, the optical functional unit is configured to include at least one, wherein the optical functional unit is one of a color conversion unit, a light extraction unit, a light control unit, a filling unit, and a filtering unit; or, the optical functional unit is configured to include at least two, wherein the at least two optical functional units are different types of a color conversion unit, a light extraction unit, a light control unit, a filling unit, and a filtering unit.

[0090] In the above scheme, when the optical functional unit includes a color conversion unit, the light-emitting devices of the display panel can be configured to emit light of the same color, so that each light-emitting device can be prepared synchronously, thereby simplifying the manufacturing process of the display panel.

[0091] In one specific embodiment of the second aspect of this disclosure, the partition includes a support portion and a blocking portion stacked on a substrate, the support portion forming a first end portion and the blocking portion forming a second end portion.

[0092] Optionally, the surfaces of the first encapsulation layer and the barrier portion are in contact, and the materials of the first encapsulation layer and the barrier portion are the same.

[0093] In one specific embodiment of the second aspect of this disclosure, a grid-like dividing hole is provided in the support portion, the dividing hole divides the support portion into multiple sub-support portions, a blocking portion covers and fills the dividing hole, the support portion is a conductive structure, the blocking portion is an insulating structure, and the second electrode is connected to the corresponding sub-support portion.

[0094] In the above scheme, the conductive part of the partition is divided into sub-support parts by the dividing hole, so that the second electrodes of the light-emitting device are independent of each other, and the second electrode of each light-emitting device can be driven independently.

[0095] In one specific embodiment of the second aspect of this disclosure, when the partition portion includes a support portion and a blocking portion stacked on the substrate, the blocking portion has an inclined sidewall on the cross section of the light-emitting device, and the difference between the acute angle at which the line connecting the edge of the second electrode and the edge of the second end intersects the surface where the substrate is located and the acute angle at which the sidewall of the blocking portion intersects the surface where the substrate is located is not less than a preset angle.

[0096] In one specific embodiment of the second aspect of this disclosure, the first end and the second end of the isolation structure are an integral structure, and in the direction perpendicular to the plane where the substrate is located, the cross-sectional profile of the portion of the partition located between two adjacent sub-pixels 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.

[0097] In one specific embodiment of the second aspect of this disclosure, the distance between the edge of the contact portion between the first electrode of an adjacent light-emitting device and the corresponding light-emitting functional layer is the pixel pitch, the pixel pitch is 2000-18000 nanometers, and the pixel density of the display panel is 90 PPI to 7400 PPI.

[0098] This disclosure provides a display panel including a substrate and an isolation structure, a display functional layer, a first encapsulation layer, and at least one optical functional layer located on the substrate. The isolation structure is located on the substrate and has a first end and a second end, the second end being located on the side of the first end away from the substrate. The orthographic projection of the first end onto the substrate lies within the orthographic projection of the second end onto the substrate. The isolation structure defines a plurality of first openings. The display functional layer is located on the substrate and includes a plurality of light-emitting devices located within corresponding first openings. Each light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked on the substrate. The first openings limit the corresponding light-emitting devices. The first encapsulation layer is located on the side of the display functional layer away from the substrate. The optical functional layer is located on the side of the light-emitting functional layer away from the substrate and includes a plurality of optical functional units. A portion of the edge of at least a portion of the film layer of the light-emitting device has its orthographic projection onto the substrate lying within the orthographic projection of the second end onto the substrate.

[0099] Optionally, along the direction from the center of the light-emitting device to the corresponding edge, the thickness of at least a portion of the film layer of the light-emitting device gradually decreases at the edge.

[0100] In one specific embodiment of the third aspect of this disclosure, the optical functional unit is located between the light-emitting functional layer and the first encapsulation layer, and the optical functional unit is disposed within at least a portion of the first opening.

[0101] Optionally, the optical functional unit is located between the light-emitting functional layer and the first encapsulation layer. A portion of the edge portion of the optical functional unit is projected onto the substrate within the projection of the second end onto the substrate, and the thickness of the edge portion of the optical functional unit gradually decreases along the direction from the center of the light-emitting device to the corresponding edge.

[0102] In one specific embodiment of the third aspect of this disclosure, the distance from the edge of the second end to the edge of the first end in a direction perpendicular to the surface of the substrate is a first height; in the cross-section of the light-emitting device, the position of the surface of the first encapsulation layer facing the substrate on a straight line passing through the edge of the second end and perpendicular to the surface of the substrate, and the distance between the edge of the first end and the edge in a direction perpendicular to the surface of the substrate, is a partition-associated height, and the difference between the first height and the partition-associated height is not less than the encapsulation safety margin.

[0103] In one specific embodiment of the third aspect of this disclosure, the distance from the edge of the second end to the edge of the first end along a direction perpendicular to the surface of the substrate is a first height, and the spacing between the first encapsulation layer and the first electrode at the middle position 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 not less than the encapsulation safety margin.

[0104] Optionally, the first thickness coefficient is greater than or equal to M and less than 1, where M is equal to 0.5 ± 0.2. Further optionally, M is the ratio of the partition's associated height to the second height. Further optionally, the first thickness coefficient is equal to M.

[0105] In one specific embodiment of the third aspect of this disclosure, at the middle position of the light-emitting device, the first encapsulation layer has a second thickness, the first encapsulation layer covers the light-emitting device and a portion of the side of the second end, and the encapsulation safety margin is equal to the product of the second thickness and the second thickness coefficient.

[0106] Optionally, the first encapsulation layer forms a closed cavity on the side of the isolation structure, and the second thickness coefficient is 0.2-2.

[0107] Optionally, the second thickness coefficient is 0.25-1.2, and more preferably, the second thickness coefficient is 0.3-0.8.

[0108] Optionally, the display panel includes a plurality of sub-pixels, each sub-pixel having two opposing long sides and two opposing short sides. Some sub-pixels have only an edge portion with gradually decreasing thickness along the direction from the center of the light-emitting device to the corresponding edge at the short side, while the long sides do not have an edge portion with gradually decreasing thickness along the direction from the center of the light-emitting device to the corresponding edge.

[0109] In one specific embodiment of the third aspect of this disclosure, the distance between the orthographic projection of the edge of the second end portion onto the substrate surface and the orthographic projection of the edge of the first end portion onto the substrate surface is a first width. Within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line passing through the edge of the second electrode and the edge of the second end portion with the substrate surface is a first tilt angle, and the first width is less than the product of the first height and the cotangent of the first tilt angle.

[0110] Optionally, the second electrode has a raised tail that overlaps the side surface of the first end.

[0111] Optionally, within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line of the edge of the light-emitting functional layer and the edge of the second end with the surface where the substrate is located is the tilt angle of the light-emitting functional layer, which is greater than the first tilt angle.

[0112] Optionally, the first width is greater than the product of the first height and the cotangent of the tilt angle of the light-emitting functional layer.

[0113] Optionally, the light-emitting functional layer includes a first functional layer. Within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line passing through the edge of the first functional layer and the edge of the second end with the surface where the substrate is located is the second tilt angle, which is greater than the tilt angle of the light-emitting functional layer.

[0114] Optionally, the light-emitting functional layer further includes a light-emitting layer and a second functional layer, the light-emitting layer and the second functional layer covering the edge of the first functional layer.

[0115] Optionally, within the cross-section of the light-emitting device, the thickness of the second electrode at the position passing through the edge of the first electrode and perpendicular to the surface of the substrate is less than the thickness of the portion of the second electrode corresponding to the middle position of the light-emitting device.

[0116] In one specific embodiment of the third aspect of this disclosure, the orthographic projection of the edge of the second end on the substrate is located between the orthographic projection of the edge of the first electrode on the substrate and the orthographic projection of the edge of the first end on the substrate.

[0117] Optionally, on the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode on the substrate and the orthographic projection of the edge of the second end on the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate.

[0118] Optionally, on the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the product of the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode on the substrate and the orthogonal projection of the edge of the second end on the substrate.

[0119] In one specific embodiment of the third aspect of this disclosure, the display panel may further include a pixel defining layer located on the first electrode and on the substrate-facing side of the partition portion and defining a second opening, the first electrode being exposed from the second opening, and the edge of the first end being located within the upper surface of the pixel defining layer.

[0120] Optionally, on the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode exposed from the second opening onto the substrate and the orthographic projection of the edge of the second end onto the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the surface of the substrate.

[0121] Optionally, on the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the product of the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode exposed from the second opening on the substrate and the orthogonal projection of the edge of the second end on the substrate.

[0122] Optionally, the pixel defining layer is an inorganic layer, and the portion of the pixel defining layer covering the gap between adjacent first electrodes has a groove conforming to the gap, with the surface of the first end facing the substrate covered by the groove.

[0123] Optionally, the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the 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.

[0124] In one specific embodiment of the third aspect of this disclosure, the display panel may further include a protective layer, which is an insulating layer, and the protective layer includes a plurality of protective units located between the first electrode and the first end.

[0125] Optionally, the protective unit covers the sidewall of the first electrode and is spaced apart from the first end of the isolation structure. Alternatively, the protective unit covers both the sidewall of the first electrode and the sidewall of the first end.

[0126] Optionally, a straight line perpendicular to the surface of the substrate and passing through the edge of the second end passes through the protection unit.

[0127] Optionally,

[0128] The first end of the protection unit and the isolation structure are spaced apart. The distance between the edge of the second end and the edge of the first end in the direction perpendicular to the surface of the substrate is the first height. In the cross section of the light-emitting device, the position of the surface of the first encapsulation layer facing the substrate is located on a straight line passing through the edge of the second end and perpendicular to the surface of the substrate. The distance between the first end and the edge of the first end in the direction perpendicular to the surface of the substrate is the isolation association height. The difference between the first height and the isolation association height is not less than the encapsulation safety margin.

[0129] or,

[0130] Along a direction perpendicular to the surface of the substrate, the distance from the edge of the second end to the edge of the first end is the first height, and at the middle position of the light-emitting device, the spacing between the first encapsulation layer and the first electrode is the second height. The product of the second height and the first thickness coefficient is the first value, and the sum of the first value and the thickness of the protection unit is the second value. The difference between the first height and the second value is not less than the encapsulation safety margin. Optionally, the first thickness coefficient is greater than or equal to M and less than 1, and M is equal to 0.5 ± 0.2. More preferably, M is the ratio of the partition association height to the second height. More preferably, the first thickness coefficient is equal to M.

[0131] or,

[0132] The protective layer covers the sidewall of the first electrode and part of the sidewall of the first end. The distance between the edge of the second end and the edge of the first end in the direction perpendicular to the surface of the substrate is the first height. In the cross section of the light-emitting device, the position of the surface of the first encapsulation layer facing the substrate is located on a straight line passing through the edge of the second end and perpendicular to the surface of the substrate. The distance between the first end and the edge of the first end in the direction perpendicular to the surface of the substrate is the isolation association height. The difference between the first height and the isolation association height is not less than the encapsulation safety margin.

[0133] or,

[0134] Along a direction perpendicular to the surface of the substrate, the distance from the edge of the second end to the edge of the first end is the first height, and at the middle position of the light-emitting device, the spacing between the first encapsulation layer and the first electrode is the second height. The product of the second height and the first thickness coefficient is the first value, and the difference between the first height and the first value is not less than the encapsulation safety margin. Optionally, the first thickness coefficient is greater than or equal to M and less than 1, and M is equal to 0.5 ± 0.2. More preferably, M is the ratio of the partition association height to the second height. More preferably, the first thickness coefficient is equal to M.

[0135] Optionally, on the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode exposed from the protective layer onto the substrate and the orthographic projection of the edge of the second end onto the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the surface of the substrate.

[0136] Optionally, on the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the product of the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode exposed from the protective layer on the substrate and the orthogonal projection of the edge of the second end on the substrate.

[0137] Optionally, the first end includes a connecting portion facing the substrate side, and the connecting portion and the first electrode are in the same layer and made of the same material.

[0138] Optionally, the protection unit and the first end of the isolation structure are spaced apart, and the substrate includes a first planarization layer and a second planarization layer on the side facing the isolation structure. The second planarization layer is located between the first planarization layer and the isolation structure, and between the first planarization layer and the first electrode. The first planarization layer is an organic layer, and the second planarization layer is an inorganic layer.

[0139] In one specific embodiment of the third aspect of this disclosure, the optical functional unit is located between the second electrode and the first encapsulation layer, and the second height includes the thickness of the portion of the optical functional unit corresponding to the middle position of the light-emitting device.

[0140] Optionally, on the cross-section of the light-emitting device, the acute angle at which the line connecting the edge of the optical functional unit to the edge of the second end intersects the surface of the substrate is greater than or equal to the acute angle at which the line connecting the edge of the light-emitting functional layer to the edge of the second end intersects the surface of the substrate.

[0141] Optionally, the display panel further includes a pixel defining layer located on the first electrode and on the substrate-facing side of the partition portion, defining a second opening. The first electrode is exposed through the second opening, and the edge of the first end is located within the upper surface of the pixel defining layer. On the cross-section of the light-emitting device, the cotangent of the acute angle between the line connecting the edge of the optical functional unit and the edge of the second end intersecting the substrate surface, and the distance between the middle portion of the lower surface of the optical functional unit and the edge of the second end in a direction perpendicular to the substrate surface, is less than or equal to the distance between the orthographic projection of the edge of the first electrode on the substrate and the orthographic projection of the edge of the second end on the substrate.

[0142] Optionally, the distance between the middle portion of the lower surface of the optical functional unit and the edge of the second end in the 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, and the difference between the distance between the middle portion of the lower surface of the optical functional unit and the middle portion of the first electrode in the direction perpendicular to the plane of the substrate.

[0143] Optionally, the optical functional unit is configured with 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 filtering unit. Alternatively, the optical functional unit is configured with at least two types, which are different types of the color conversion unit, light extraction unit, light control unit, filling unit, and filtering unit.

[0144] Optionally, the optical functional unit is configured to include a color conversion unit, a light extraction unit, a light modulation unit, a filling unit, and a filtering unit. The color conversion unit and the filling unit correspond to different light-emitting devices and are arranged side by side. The filtering unit is located on the side of the corresponding color conversion unit or filling unit away from the substrate. The light modulation unit is located on the side of the corresponding light extraction unit away from the substrate. 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 modulation unit away from the substrate.

[0145] In one embodiment of the third aspect of this disclosure, the optical functional unit is located on the side of the first encapsulation layer away from the substrate.

[0146] Optionally, the display panel further includes 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 including a multiplexing unit reused as a color conversion unit.

[0147] Optionally, the display panel further includes 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 located between the first encapsulation layer and the second encapsulation layer.

[0148] In one specific embodiment of the third aspect of this disclosure, the light-emitting functional layers of the light-emitting device are all configured to emit light of a first color. The optical functional unit includes a color conversion unit, which 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 into second color light, and the second color conversion unit is configured to convert the first color light into third color light, wherein the wavelengths of the first color light, the second color light, and the third color light increase sequentially.

[0149] Optionally, the first color light, the second color light, and the third color light emit blue light, green light, and red light, respectively. The material of the first color conversion unit includes G-quantum dot material, and the material of the second color conversion unit includes R-quantum dot material.

[0150] Optionally, the light-emitting functional layer has a stacked structure.

[0151] Optionally, the light emission type of the light-emitting functional layer is fluorescence or phosphorescence.

[0152] Optionally, the color conversion unit is located on the side of the second electrode away from the substrate.

[0153] Optionally, there is a gap between the edge of the color conversion unit and the isolation structure.

[0154] In one specific embodiment of the third aspect of this disclosure, the light-emitting functional layer of the light-emitting device includes at least two light-emitting layers, at least one of which is configured to emit a first color light and at least one of which is configured to emit a second color light. 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 into the second color light, and the second color conversion unit is configured to convert the first color light into the third color light. The wavelengths of the first color light, the second color light, and the third color light increase sequentially, or the wavelengths of the first color light, the third color light, and the second color light increase sequentially.

[0155] Optionally, the first color light, the second color light, and the third color light are blue light, green light, and red light, respectively. The material of the first color conversion unit includes G-quantum dot material, and the material of the second color conversion unit includes R-quantum dot material.

[0156] Optionally, the first color light, the second color light, and the third color light emit blue light, red light, and green light, respectively. The material of the first color conversion unit includes R-quantum dot material, and the material of the second color conversion unit includes G-quantum dot material.

[0157] Optionally, the light emission type of the light-emitting functional layer is fluorescence or phosphorescence.

[0158] Optionally, the quantum dot material includes perovskite quantum dots and / or group II-VI semiconductor quantum dots; optionally, the perovskite quantum dots include at least one of CsPbX3 and CH3NH3PbX3, wherein X is a halogen atom.

[0159] Further, optionally, the halogen atom includes at least one of F, Cl, Br and I.

[0160] Further optionally, the II-VI group 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.

[0161] Optionally, the film thickness of the color conversion unit is 500-10000 nanometers; further optionally, the film thickness of the color conversion unit is 600-3000 nanometers; and even further optionally, the film thickness of the color conversion unit is 800-1200 nanometers.

[0162] In one specific embodiment of the third aspect of this disclosure, the optical functional unit is configured to include at least a filling unit and a color conversion unit, wherein the color conversion unit includes a red color conversion unit disposed on the side of the light-emitting functional layer of the light-emitting device emitting red light away from the substrate, a green color conversion unit disposed on the side of the light-emitting functional layer of the light-emitting device emitting green light away from the substrate, and the filling unit is disposed on the side of the light-emitting functional layer of the light-emitting device emitting blue light away from the substrate.

[0163] In one specific embodiment of the third aspect of this disclosure, the optical functional unit is configured to include at least a light extraction unit, located between the corresponding light-emitting device and the corresponding color conversion unit or on the side of the color conversion unit away from the substrate.

[0164] Optionally, the optical extraction unit includes a first extraction sub-layer. Alternatively, the optical extraction unit includes a first extraction sub-layer, a second extraction sub-layer located on the side of the first extraction sub-layer facing the substrate, and a third extraction sub-layer located on the side of the first extraction sub-layer facing away from the substrate, wherein the refractive indices of the second and third extraction sub-layers are both less than the refractive index of the first extraction sub-layer.

[0165] Optionally, the refractive index of the first extracted sublayer is 2.0-2.3, and more preferably, the refractive index of the first extracted sublayer is 2.1-2.2.

[0166] Optionally, the thickness of the first extracted sublayer is 45-75 nanometers, and more preferably, the thickness of the first extracted sublayer is 55-65 nanometers.

[0167] Optionally, the refractive index of the second and / or third extraction sublayer is 1.4-1.8, and more preferably, the refractive index of the second and / or third extraction sublayer is 1.5-1.6.

[0168] Optionally, the thickness of the second extraction sublayer and / or the third extraction sublayer is 7-30 nanometers, and more preferably, the thickness of the second extraction sublayer and / or the third extraction sublayer is 10-20 nanometers.

[0169] In one specific embodiment of the third aspect of this disclosure, the optical functional unit is configured to include at least a light modulation unit located on the side of the corresponding light extraction unit away from the substrate.

[0170] Optionally, the light control unit is located between the corresponding light extraction unit and the corresponding color conversion unit.

[0171] Optionally, the material of the light control unit includes LiF material.

[0172] Optionally, 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.

[0173] In one specific embodiment of the third aspect of this disclosure, the partition includes a support portion and a blocking portion stacked on a substrate, the support portion forming a first end portion and the blocking portion forming a second end portion.

[0174] Optionally, the surfaces of the first encapsulation layer and the barrier portion are in contact, and the materials of the first encapsulation layer and the barrier portion are the same.

[0175] In one specific embodiment of the third aspect of this disclosure, a grid-like dividing hole is provided in the support portion, the dividing hole divides the support portion into multiple sub-support portions, a blocking portion covers and fills the dividing hole, the support portion is a conductive structure, the blocking portion is an insulating structure, and the second electrode is connected to the corresponding sub-support portion.

[0176] In one specific embodiment of the third aspect of this disclosure, the partition includes a support portion and a blocking portion stacked on the substrate. On the cross-section of the light-emitting device, the blocking portion has an inclined sidewall. The difference between the acute angle at which the line connecting the edge of the second electrode and the edge of the second end intersects the surface of the substrate and the acute angle at which the sidewall of the blocking portion intersects the surface of the substrate is not less than a preset angle.

[0177] In one specific embodiment of the third aspect of this disclosure, the first end and the second end of the isolation structure are an integral structure, and in the direction perpendicular to the plane where the substrate is located, the cross-sectional profile of the portion of the partition located between two adjacent sub-pixels 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.

[0178] In one specific embodiment of the third aspect of this disclosure, the optical functional unit is configured to include at least a filter unit and a color conversion unit, the filter unit being located on the side of the corresponding color conversion unit away from the substrate, and a blocking portion being provided between adjacent filter units.

[0179] Optionally, the filter unit is located between the corresponding color conversion unit and the first encapsulation layer, and part of the isolation structure is reused as a shielding part.

[0180] In one specific embodiment of the third aspect of this disclosure, the distance between the edge of the contact portion between the first electrode of an adjacent light-emitting device and the corresponding light-emitting functional layer is the pixel pitch, the pixel pitch is 2000-18000 nanometers, and the pixel density of the display panel is 90 PPI to 7400 PPI.

[0181] This disclosure provides a fourth aspect of a display panel, comprising a substrate and an isolation structure, a display functional layer, and a first encapsulation layer located on the substrate. The isolation structure is located on the substrate and has a first end and a second end, the second end being located on the side of the first end away from the substrate. The orthographic projection of the first end onto the substrate lies within the orthographic projection of the second end onto the substrate. The isolation structure defines a plurality of first openings. The display functional layer is located on the substrate and includes a plurality of light-emitting devices located within corresponding first openings. Each light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked on the substrate. The first openings limit the corresponding light-emitting devices. The first encapsulation layer is located on the side of the display functional layer away from the substrate. A first height is defined as the distance from the edge of the second end to the edge of the first end in a direction perpendicular to the substrate surface. In the cross-section of the light-emitting device, the position of the first encapsulation layer facing the substrate on a straight line passing through the edge of the second end and perpendicular to the substrate surface, and the distance between this position and the edge of the first end in a direction perpendicular to the substrate surface, is defined as a separation-related height. The difference between the first height and the separation-related height is not less than an encapsulation safety margin.

[0182] In one specific embodiment of the fourth aspect of this disclosure, at the middle position of the light-emitting device, the spacing between the first encapsulation layer and the first electrode is a second height, the product of the second height and a first thickness coefficient is a first value, and the difference between the first height and the first value is not less than the encapsulation safety margin. Optionally, the first thickness coefficient is greater than or equal to M and less than 1, where M equals 0.5 ± 0.2. Further optionally, M is the ratio of the partition-related height to the second height, and further optionally, the first thickness coefficient is equal to M.

[0183] In one embodiment of the fourth aspect of this disclosure, a first encapsulation layer has a second thickness at the middle position of the light-emitting device. The first encapsulation layer covers the light-emitting device and a portion of the side surface of the second end, and the encapsulation safety margin is equal to the product of the second thickness and a second thickness coefficient.

[0184] Optionally, the second thickness coefficient is 0.2-2. Further optionally, the second thickness coefficient is 0.25-1.2. Still further optionally, the second thickness coefficient is 0.3-0.8.

[0185] In one specific embodiment of the fourth aspect of this disclosure, the distance between the orthographic projection of the edge of the second end onto the substrate surface and the orthographic projection of the edge of the first end onto the substrate surface is a first width. Within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line passing through the edge of the second electrode and the edge of the second end with the substrate surface is a first tilt angle. The first width is less than the product of the first height and the cotangent of the first tilt angle.

[0186] Optionally, within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line of the edge of the light-emitting functional layer and the edge of the second end with the surface where the substrate is located is the tilt angle of the light-emitting functional layer, which is greater than the first tilt angle.

[0187] Optionally, the first width is greater than the product of the first height and the cotangent of the tilt angle of the light-emitting functional layer.

[0188] Optionally, the light-emitting functional layer includes a first functional layer. Within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line passing through the edge of the first functional layer and the edge of the second end with the surface where the substrate is located is the second tilt angle, which is greater than the tilt angle of the light-emitting functional layer.

[0189] Optionally, the light-emitting functional layer further includes a light-emitting layer and a second functional layer, the light-emitting layer and the second functional layer covering the edge of the first functional layer.

[0190] Optionally, within the cross-section of the light-emitting device, the thickness of the second electrode at the position passing through the edge of the first electrode and perpendicular to the surface of the substrate is less than the thickness of the portion of the second electrode corresponding to the middle position of the light-emitting device.

[0191] In one specific embodiment of the fourth aspect of this disclosure, the orthographic projection of the edge of the second end on the substrate is located between the orthographic projection of the edge of the first electrode on the substrate and the orthographic projection of the edge of the first end on the substrate.

[0192] Optionally, on the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode on the substrate and the orthographic projection of the edge of the second end on the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate.

[0193] Optionally, on the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the product of the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode on the substrate and the orthogonal projection of the edge of the second end on the substrate.

[0194] In one embodiment of the fourth aspect of this disclosure, the display panel may further include a pixel defining layer located on the first electrode and on the substrate-facing side of the partition portion and defining a second opening, the first electrode being exposed from the second opening, and the edge of the first end being located within the upper surface of the pixel defining layer.

[0195] Optionally, on the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode exposed from the second opening onto the substrate and the orthographic projection of the edge of the second end onto the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the surface of the substrate.

[0196] Optionally, on the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the product of the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode exposed from the second opening on the substrate and the orthogonal projection of the edge of the second end on the substrate.

[0197] Optionally, the pixel defining layer is an inorganic layer, and the portion of the pixel defining layer covering the gap between adjacent first electrodes has a groove conforming to the gap, with the surface of the first end facing the substrate covered by the groove.

[0198] Optionally, the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the 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.

[0199] In one specific embodiment of the fourth aspect of this disclosure, the partition includes a support portion and a blocking portion stacked on a substrate, the support portion forming a first end portion and the blocking portion forming a second end portion.

[0200] Optionally, the surfaces of the first encapsulation layer and the barrier portion are in contact, and the materials of the first encapsulation layer and the barrier portion are the same.

[0201] In one specific embodiment of the fourth aspect of this disclosure, a grid-like dividing hole is provided in the support portion, the dividing hole divides the support portion into multiple sub-support portions, a blocking portion covers and fills the dividing hole, the support portion is a conductive structure, the blocking portion is an insulating structure, and the second electrode is connected to the corresponding sub-support portion.

[0202] In one specific embodiment of the fourth aspect of this disclosure, the partition includes a support portion and a blocking portion stacked on the substrate. On the cross-section of the light-emitting device, the blocking portion has an inclined sidewall. The difference between the acute angle at which the line connecting the edge of the second electrode and the edge of the second end intersects the surface of the substrate and the acute angle at which the sidewall of the blocking portion intersects the surface of the substrate is not less than a preset angle.

[0203] In one specific embodiment of the fourth aspect of this disclosure, the first end and the second end of the isolation structure are an integral structure, and in the direction perpendicular to the plane where the substrate is located, the cross-sectional profile of the portion of the partition located between two adjacent sub-pixels 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.

[0204] In one specific embodiment of the fourth aspect of this disclosure, the distance between the edge of the contact portion between the first electrode of an adjacent light-emitting device and the corresponding light-emitting functional layer is the pixel pitch, the pixel pitch is 2000-18000 nanometers, and the pixel density of the display panel is 90 PPI to 7400 PPI.

[0205] This disclosure discloses a fifth aspect of a display panel, characterized in that it includes a substrate, an isolation structure and a display functional layer located on the substrate, wherein the isolation structure has a first end and a second end, the second end being located on the side of the first end away from the substrate, the isolation structure defining a plurality of first openings, the display functional layer including a plurality of light-emitting devices located within corresponding first openings, the light-emitting devices including a first electrode, a light-emitting functional layer and a second electrode stacked on the substrate, the orthographic projection of the light-emitting functional layer on the substrate being located outside the orthographic projection of the first end on the substrate and inside the orthographic projection of the second end on the substrate, the spacing between the edges of the contact portions of the first electrodes of adjacent light-emitting devices and the corresponding light-emitting functional layers is a pixel pitch, the pixel pitch being 2000-18000 nanometers.

[0206] In one specific embodiment of the fifth aspect of this disclosure, the cross-sectional profile of the portion of the partition located between two adjacent sub-pixels on the front cross-section of the light-emitting device 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, wherein the width of the top of the inverted trapezoid is 1500-16000 nanometers.

[0207] In another specific embodiment of the fifth aspect of this disclosure, the partition portion includes a support portion and a blocking portion stacked on a substrate. The support portion constitutes a first end portion, and the blocking portion constitutes a second end portion. On the front cross section of the light-emitting device, the cross-sectional profiles of the portions of the support portion and the blocking portion located between two adjacent sub-pixels are both trapezoidal. The edge of the second end portion is the edge of the surface of the blocking 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. The width of the base of the trapezoid corresponding to the support portion is 1258-17000 nm, and the width of the top of the trapezoid corresponding to the support portion is 880-15000 nm.

[0208] In one specific embodiment of the fifth aspect of this disclosure, the display panel may include a plurality of pixels, and each pixel includes a plurality of sub-pixels that emit light of different wavelengths. The plurality of sub-pixels of the plurality of 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 include a different light-emitting device.

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

[0210] Optionally, each pixel may be arranged in a first pixel arrangement with the first sub-pixel, the second sub-pixel, and the third sub-pixel side by side; or, each pixel may be arranged in a second pixel arrangement with the second sub-pixel and the third sub-pixel arranged in a column / row and side by side with the first sub-pixel.

[0211] Optionally, the higher the pixel density, the smaller the pixel pitch and / or the smaller the average width of the subpixels.

[0212] In one specific embodiment of the fifth aspect of this disclosure, the partition portion of the isolation structure is in direct contact with the substrate, the edge of the first spacing is the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device, the distance between the orthographic projection of the edge of the second end on the substrate surface and the orthographic projection of the edge of the first end on the substrate surface is the first width, and the distance between the orthographic projection of the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device and the edge of the second end on the substrate surface is the first spacing. In this case, the pixel pitch is 2000-2200 nanometers, the first pitch is 0-1017 nanometers, and the first width is 148-417 nanometers; or, the pixel pitch is 2200-2500 nanometers, the first pitch is 0-1050 nanometers, and the first width is 166-450 nanometers; or, the pixel pitch is 2500-3200 nanometers, the first pitch is 0-1090 nanometers, and the first width is 185-490 nanometers; or, the pixel pitch is 3200-4000 nanometers, the first pitch is 0-1130 nanometers, and the first width is 203-530 nanometers. Alternatively, the pixel pitch is 4000-6000 nanometers, the first spacing is 0-1170 nanometers, and the first width is 221-570 nanometers; or, the pixel pitch is 6000-9000 nanometers, the first spacing is 0-1210 nanometers, and the first width is 240-610 nanometers; or, the pixel pitch is 9000-13000 nanometers, the first spacing is 0-1300 nanometers, and the first width is 259-700 nanometers; or, the pixel pitch is 13000-18000 nanometers, the first spacing is 0-1410 nanometers, and the first width is 277-810 nanometers.

[0213] For example, on the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the product of the distance between the middle part of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode on the substrate and the orthogonal projection of the edge of the second end on the substrate. For example, the pixel pitch is 2000-2200 nm, and the first pitch is 148-567 nm; or, the pixel pitch is 2200-2500 nm, and the first pitch is 166-650 nm; or, the pixel pitch is 2500-3200 nm, and the first pitch is 185-740 nm; or, the pixel pitch is 3200-4000 nm, and the first pitch is 203-830 nm; or, the pixel pitch is 4000-6000 nm, and the first pitch is 221-920 nm; or, the pixel pitch is 6000-9000 nm, and the first pitch is 240-1010 nm; or, the pixel pitch is 9000-13000 nm, and the first pitch is 259-1150 nm; or, the pixel pitch is 13000-18000 nm, and the first pitch is 277-1310 nm.

[0214] For example, further, along a direction perpendicular to the surface of the substrate, the distance from the edge of the second end to the edge of the first end is a first height, which is 400-2200 nanometers. Optionally, the pixel pitch is 2000-2200 nm and the first height is 400-800 nm; or, the pixel pitch is 2200-2500 nm and the first height is 450-850 nm; or, the pixel pitch is 2500-3200 nm and the first height is 500-900 nm; or, the pixel pitch is 3200-4000 nm and the first height is 550-950 nm; or, the pixel pitch is 4000-6000 nm and the first height is 600-1000 nm; or, the pixel pitch is 6000-9000 nm and the first height is 650-1100 nm; or, the pixel pitch is 9000-13000 nm and the first height is 700-1200 nm; or, the pixel pitch is 13000-18000 nm and the first height is 750-2200 nm.

[0215] For example, on the front cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode onto the substrate and the orthographic projection of the edge of the second end onto the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the surface of the substrate. In this case, the pixel pitch is 2000-2200 nm, the first pitch is 0-415 nm, and the first width is 148-417 nm; or, the pixel pitch is 2200-2500 nm, the first pitch is 0-446 nm, and the first width is 166-450 nm; or, the pixel pitch is 2500-3200 nm, the first pitch is 0-484 nm, and the first width is 185-490 nm; or, the pixel pitch is 3200-4000 nm, the first pitch is 0-522 nm, and the first width is 203-530 nm. Alternatively, the pixel pitch is 4000-6000 nanometers, the first spacing is 0-560 nanometers, and the first width is 221-570 nanometers; or, the pixel pitch is 6000-9000 nanometers, the first spacing is 0-598 nanometers, and the first width is 240-610 nanometers; or, the pixel pitch is 9000-13000 nanometers, the first spacing is 0-685 nanometers, and the first width is 259-700 nanometers; or, the pixel pitch is 13000-18000 nanometers, the first spacing is 0-790 nanometers, and the first width is 277-810 nanometers.

[0216] Optionally, the display panel may further include at least one optical functional layer located on the side of the light-emitting functional layer away from the substrate, and including a plurality of optical functional units located within the first opening. The thickness of the edge portion of at least a portion of the film layer of the optical functional unit gradually decreases, and for each two adjacent first electrodes, the pixel pitch between the edges of the portions of the first electrodes that contact the light-emitting functional layer in the same light-emitting device is 2074-18000 nanometers.

[0217] In one specific embodiment of the fifth aspect of this disclosure, the display panel may further include a pixel defining layer located on the first electrode and on the substrate-facing side of the partition portion, defining a second opening. The pixel defining layer covers the edge of the first electrode, and the second opening exposes the first electrode. The edge of the second opening coincides with the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device. The distance between the orthographic projection of the edge of the second end on the substrate surface and the orthographic projection of the edge of the first end on the substrate surface is a first width, and the distance between the orthographic projection of the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device and the edge of the second end on the substrate surface is a first spacing. For example, the pixel pitch is 2200-2500 nanometers, the first spacing is 0-1050 nanometers, and the first width is 148-450 nanometers; or, the pixel pitch is 2500-3200 nanometers, the first spacing is 0-1090 nanometers, and the first width is 185-490 nanometers; or, the pixel pitch is 3200-4000 nanometers, the first spacing is 0-1130 nanometers, and the first width is 203-530 nanometers; or, the pixel pitch is 4000-6000 nanometers, and the first spacing is 0... -1170 nm, first width 221-570 nm; or, pixel pitch 6000-9000 nm, first pitch 0-1210 nm, first width 240-610 nm; or, pixel pitch 9000-13000 nm, first pitch 0-1300 nm, first width 259-700 nm; or, pixel pitch 13000-18000 nm, first pitch 0-1410 nm, first width 277-810 nm.

[0218] Optionally, on the cross-section of the light-emitting device, the product of the cotangent of the acute angle between the line connecting the edge of the light-emitting functional layer and the edge of the second end and the plane where the substrate is located, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the plane where the substrate is located, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode exposed from the second opening on the substrate and the orthogonal projection of the edge of the second end on the substrate. For example, the pixel pitch is 2200-2500 nm, the first pitch is 148-650 nm, and the first width is 148-450 nm; or, the pixel pitch is 2500-3200 nm, the first pitch is 185-740 nm, and the first width is 185-490 nm; or, the pixel pitch is 3200-4000 nm, the first pitch is 203-830 nm, and the first width is 203-530 nm; or, the pixel pitch is 4000-6000 nm, and the first pitch is 221 nm. -920 nm, first width 221-570 nm; or, pixel pitch 6000-9000 nm, first pitch 240-1010 nm, first width 240-610 nm; or, pixel pitch 9000-13000 nm, first pitch 259-1150 nm, first width 259-700 nm; or, pixel pitch 13000-18000 nm, first pitch 277-1310 nm, first width 277-810 nm.

[0219] For example, in a direction perpendicular to the surface of the substrate, the distance from the edge of the second end to the edge of the first end is a first height, which is 400-2200 nanometers. Optionally, the pixel pitch is 2200-2500 nanometers and the first height is 400-850 nanometers; or, the pixel pitch is 2500-3200 nanometers and the first height is 500-900 nanometers; or, the pixel pitch is 3200-4000 nanometers and the first height is 550-950 nanometers; or, the pixel pitch is 4000-6000 nanometers and the first height is 600-1000 nanometers; or, the pixel pitch is 6000-9000 nanometers and the first height is 650-1100 nanometers; or, the pixel pitch is 9000-13000 nanometers and the first height is 700-1200 nanometers; or, the pixel pitch is 13000-18000 nanometers and the first height is 750-2200 nanometers.

[0220] Optionally, on the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode exposed from the second opening onto the substrate and the orthographic projection of the edge of the second end onto the substrate is less than: the cotangent of the acute angle between the line connecting the edge of the light-emitting functional layer and the edge of the second end intersecting the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the surface of the substrate. For example, the pixel pitch is 2200-2500 nm, the first pitch is 0-446 nm, and the first width is 148-450 nm; or, the pixel pitch is 2500-3200 nm, the first pitch is 0-484 nm, and the first width is 185-490 nm; or, the pixel pitch is 3200-4000 nm, the first pitch is 0-522 nm, and the first width is 203-530 nm; or, the pixel pitch is 4000-6000 nm, and the first pitch is... 0-560 nanometers, with a first width of 221-570 nanometers; or, pixel pitch of 6000-9000 nanometers, with a first pitch of 0-598 nanometers and a first width of 240-610 nanometers; or, pixel pitch of 9000-13000 nanometers, with a first pitch of 0-685 nanometers and a first width of 259-700 nanometers; or, pixel pitch of 13000-18000 nanometers, with a first pitch of 0-790 nanometers and a first width of 277-810 nanometers.

[0221] In one specific embodiment of the fifth aspect of this disclosure, the display panel may further include at least one optical functional layer located on the side of the light-emitting functional layer away from the substrate, and including a plurality of optical functional units located within a first opening, wherein the thickness of at least a portion of the film layer of the optical functional unit gradually decreases, and for each two adjacent first electrodes, the pixel pitch between the edges of the portions of the first electrodes that contact the light-emitting functional layer in the same light-emitting device is 2274-18000 nanometers.

[0222] A sixth aspect of this disclosure provides a display panel including a substrate, an isolation structure and a display functional layer located on the substrate, wherein the isolation structure has a first end and a second end, the second end being located on the side of the first end away from the substrate, the isolation structure defining a plurality of first openings, and the display functional layer including a plurality of light-emitting devices located within corresponding first openings, the light-emitting devices including a first electrode, a light-emitting functional layer and a second electrode stacked on the substrate, the orthographic projection of the light-emitting functional layer on the substrate being located outside the orthographic projection of the first end on the substrate and inside the orthographic projection of the second end on the substrate, and the pixel density of the display panel being 90 PPI to 7400 PPI.

[0223] In one specific embodiment of the sixth aspect of this disclosure, the thickness of at least a portion of the film layer of the light-emitting device gradually decreases along the direction from the center of the light-emitting device to the corresponding edge.

[0224] In one specific embodiment of the sixth aspect of this disclosure, the pixel pitch between the edge of the contact portion between the first electrode of an adjacent light-emitting device and the corresponding light-emitting functional layer is 2000-18000 nanometers.

[0225] In one specific embodiment of the sixth aspect of this disclosure, on the front cross section of the light-emitting device, the cross-sectional profile of the portion of the partition located between two adjacent sub-pixels 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.

[0226] In another specific embodiment of the sixth aspect of this disclosure, the partition portion includes a support portion and a blocking portion stacked on a substrate. The support portion constitutes a first end portion and the blocking portion constitutes a second end portion. On the front cross section of the light-emitting device, the cross-sectional profiles of the portions of the support portion and the blocking portion located between two adjacent sub-pixels are both trapezoidal. The edge of the second end portion is the edge of the blocking portion facing the substrate, and the edge of the first end portion is the edge of the support portion facing the substrate.

[0227] In one specific embodiment of the sixth aspect of this disclosure, the display panel includes a plurality of pixels, and each pixel includes a plurality of sub-pixels that emit light of different wavelengths. The plurality of sub-pixels of the plurality of 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 include a different light-emitting device.

[0228] Optionally, the ratio of the number of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 1:1:1.

[0229] Optionally, each pixel may be arranged in a first pixel arrangement with the first sub-pixel, the second sub-pixel, and the third sub-pixel side by side; or, each pixel may be arranged in a second pixel arrangement with the second sub-pixel and the third sub-pixel arranged in a column / row and side by side with the first sub-pixel.

[0230] In one specific embodiment of the sixth aspect of this disclosure, the pixel density of the display panel is 90-5200 PPI. Optionally, the pixel pitch is 2000-2200 nanometers, and the pixel density of the display panel is 117-5200 PPI; or, the pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 117-4792 PPI; or, the pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 115-4305 PPI; or, the pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 115-3479 PPI. Alternatively, the pixel pitch is 4000-6000 nanometers, and the pixel density of the display panel is 111-2854 PPI; or the pixel pitch is 6000-9000 nanometers, and the pixel density of the display panel is 107-1969 PPI; or the pixel pitch is 9000-13000 nanometers, and the pixel density of the display panel is 102-1344 PPI; or the pixel pitch is 13000-18000 nanometers, and the pixel density of the display panel is 90-944 PPI.

[0231] In one specific embodiment of the sixth aspect of this disclosure, the subpixels within a pixel are arranged in a first pixel configuration, and the pixel density of the display panel is 170-3456 PPI. Optionally, the pixel pitch is 2000-2200 nanometers, and the pixel density of the display panel is 2545-3456 PPI; or, the pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 2171-3143 PPI; or, the pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 1577-2765 PPI; or, the pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 1063-2160 PPI. PI; or, with a pixel pitch of 4000-6000 nanometers, the display panel has a pixel density of 529-1728 PPI; or, with a pixel pitch of 6000-9000 nanometers, the display panel has a pixel density of 353-1152 PPI; or, with a pixel pitch of 9000-13000 nanometers, the display panel has a pixel density of 244-768 PPI; or, with a pixel pitch of 13000-18000 nanometers, the display panel has a pixel density of 170-531 PPI.

[0232] In one specific embodiment of the sixth aspect of this disclosure, the subpixels within a pixel are arranged in a second pixel configuration, and the pixel density of the display panel is 260-5200 PPI. Optionally, the pixel pitch is 2000-2200 nanometers, and the pixel density of the display panel is 3818-5200 PPI; or, the pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 3256-4714 PPI; or, the pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 2366-4147 PPI; or, the pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 1594-3240 PPI. I; or, the pixel pitch is 4000-6000 nanometers, and the pixel density of the display panel is 794-2592 PPI; or, the pixel pitch is 6000-9000 nanometers, and the pixel density of the display panel is 529-1728 PPI; or, the pixel pitch is 9000-13000 nanometers, and the pixel density of the display panel is 366-1152 PPI; or, the pixel pitch is 13000-18000 nanometers, and the pixel density of the display panel is 260-797 PPI.

[0233] In one specific embodiment of the sixth aspect of this disclosure, the display panel further includes at least one optical functional layer, wherein the optical functional layer is located on the side of the light-emitting functional layer away from the substrate, and includes a plurality of optical functional units located within a first opening, wherein the thickness of at least a portion of the film layer of the optical functional units gradually decreases, and for each pair of adjacent first electrodes, the pixel pitch between the edges of the portions of the first electrodes that contact the light-emitting functional layer in the same light-emitting device is 2074-18000 nanometers, and the pixel density of the display panel is 90-5000 PPI.

[0234] In one specific embodiment of the sixth aspect of this disclosure, the display panel may further include a pixel defining layer, which is located on the first electrode and on the substrate-facing side of the partition portion and defines a second opening. The pixel defining layer covers the edge of the first electrode, the second opening exposes the first electrode, the edge of the second opening coincides with the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device, the distance between the orthographic projection of the edge of the second end on the substrate surface and the orthographic projection of the edge of the first end on the substrate surface is a first width, the distance between the orthographic projection of the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device and the edge of the second end on the substrate surface is a first spacing, the sub-pixels in the pixel are arranged in a first pixel arrangement, and the pixel density of the display panel is 170-3143 PPI. For example, a pixel pitch of 2200-2500 nanometers results in a display panel pixel density of 2171-3143 PPI; or a pixel pitch of 2500-3200 nanometers results in a display panel pixel density of 1577-2765 PPI; or a pixel pitch of 3200-4000 nanometers results in a display panel pixel density of 1063-2160 PPI; or a pixel pitch of 4000-6000 nanometers results in a display panel pixel density of 529-1728 PPI; or a pixel pitch of 6000-9000 nanometers results in a display panel pixel density of 353-1152 PPI; or a pixel pitch of 9000-13000 nanometers results in a display panel pixel density of 244-768 PPI; or a pixel pitch of 13000-18000 nanometers results in a display panel pixel density of 170-531 PPI.

[0235] In one specific embodiment of the sixth aspect of this disclosure, the display panel may further include a pixel defining layer, which is located on the first electrode and on the substrate-facing side of the partition portion and defines a second opening. The pixel defining layer covers the edge of the first electrode, the second opening exposes the first electrode, the edge of the second opening coincides with the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device, the distance between the orthographic projection of the edge of the second end on the substrate surface and the orthographic projection of the edge of the first end on the substrate surface is a first width, the distance between the orthographic projection of the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device and the edge of the second end on the substrate surface is a first spacing, the sub-pixels in the pixel are arranged in a second pixel arrangement, and the pixel density of the display panel is 260-4714 PPI. For example, a pixel pitch of 2200-2500 nanometers results in a display panel pixel density of 3256-4714 PPI; or a pixel pitch of 2500-3200 nanometers results in a display panel pixel density of 2366-4147 PPI; or a pixel pitch of 3200-4000 nanometers results in a display panel pixel density of 1594-3240 PPI; or a pixel pitch of 4000-6000 nanometers results in a display panel pixel density of 794-2592 PPI; or a pixel pitch of 6000-9000 nanometers results in a display panel pixel density of 529-1728 PPI; or a pixel pitch of 9000-13000 nanometers results in a display panel pixel density of 366-1152 PPI; or a pixel pitch of 13000-18000 nanometers results in a display panel pixel density of 260-797 PPI.

[0236] For example, with a pixel pitch of 2000-2200 nanometers, the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 450-1326 nanometers; or, with a pixel pitch of 2200-2500 nanometers, the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 494-1700 nanometers; or, with a pixel pitch of 2500-3200 nanometers, the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 563-2868 nanometers; or, with a pixel pitch of 3200-4000 nanometers, the average width of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 720-4767 nanometers; or, pixel... The pixel pitch is 4000-6000 nm, with the average width of the first, second, and third sub-pixels being 900-11995 nm; or, the pixel pitch is 6000-9000 nm, with the average width of the first, second, and third sub-pixels being 1350-18008 nm; or, the pixel pitch is 9000-13000 nm, with the average width of the first, second, and third sub-pixels being 2025-25699 nm; or, the pixel pitch is 13000-18000 nm, with the average width of the first, second, and third sub-pixels being 4050-35846 nm.

[0237] Optionally, based on the above data, the aperture ratio of the display panel is 6-60%.

[0238] In one specific embodiment of the sixth aspect of this disclosure, the display panel may further include at least one optical functional layer located on the side of the light-emitting functional layer away from the substrate, and including a plurality of optical functional units located within a first opening. The thickness of the edge portion of at least a portion of the film layer of the optical functional unit gradually decreases. For each pair of adjacent first electrodes, the pixel pitch between the edges of the portions of the first electrodes that contact the light-emitting functional layer in the same light-emitting device is 2274-18000 nanometers, and the pixel density of the display panel is 90-4560 PPI.

[0239] In one specific embodiment of the sixth aspect of this disclosure, the display panel includes a plurality of pixels. Each pixel includes a first sub-pixel, a second sub-pixel, and a third sub-pixel whose emitted light wavelengths decrease sequentially. The first sub-pixel, the second sub-pixel, and the third sub-pixel each include different light-emitting devices and are arranged in multiple rows and columns. The first sub-pixel and the third sub-pixel are arranged in the same row and column, but in different rows and columns from the second sub-pixel. In the rows and columns where the first sub-pixel and the third sub-pixel are arranged, the first sub-pixel and the third sub-pixel are arranged alternately. Rows with first sub-pixels and rows with second sub-pixels are arranged alternately, and columns with first sub-pixels and columns with second sub-pixels are arranged alternately. Each second sub-pixel is surrounded by two first sub-pixels and two third sub-pixels. The quadrilateral formed by connecting the centroids of the two first sub-pixels and two third sub-pixels surrounding the same second sub-pixel has at least two opposite sides that are parallel. Optionally, the pixel density of the display panel is 200-7400 PPI. Optionally, the pixel pitch is 2000-2200 nanometers, and the pixel density of the display panel is 249-7400 PPI; or, the pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 248-6778 PPI; or, the pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 245-6088 PPI; or, the pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 243-4921 PPI; or, the pixel pitch is 4000-6000 nanometers, and the pixel density of the display panel is... The pixel density of the display panel is 236-4036 PPI; or, with a pixel pitch of 6000-9000 nanometers, the pixel density of the display panel is 227-2785 PPI; or, with a pixel pitch of 9000-13000 nanometers, the pixel density of the display panel is 216-1901 PPI; or, with a pixel pitch of 13000-16500 nanometers, the pixel density of the display panel is 208-1335 PPI; or, with a pixel pitch of 16500-18000 nanometers, the pixel density of the display panel is 200-1060 PPI.

[0240] In one specific embodiment of the sixth aspect of this disclosure, the centroid of the surrounded second sub-pixel is offset from the intersection point of the two diagonals of the corresponding quadrilateral, or the centroid of the surrounded second sub-pixel coincides with the intersection point of the two diagonals of the quadrilateral. Optionally, the pixel pitch is 2000-2200 nanometers, and the pixel density of the display panel is 1600-3000 PPI; or, the pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 1400-2700 PPI; or, the pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 1200-2400 PPI; or, the pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 1000-2100 PPI; or, the pixel pitch is 4000-6000 nanometers. The pixel density of the display panel is 800–1800 PPI; or, the pixel pitch is 6000–9000 nanometers and the pixel density of the display panel is 600–1500 PPI; or, the pixel pitch is 9000–13000 nanometers and the pixel density of the display panel is 400–1200 PPI; or, the pixel pitch is 13000–16500 nanometers and the pixel density of the display panel is 300–900 PPI; or, the pixel pitch is 16500–18000 nanometers and the pixel density of the display panel is 200–800 PPI.

[0241] A seventh aspect of this disclosure provides a display device that may include the display panel mentioned in any of the specific embodiments of the first to sixth aspects described above. Attached Figure Description

[0242] Figure 1 The diagram shown is a planar structural schematic of a display panel according to an embodiment of this disclosure.

[0243] Figure 2 for Figure 1 A magnified view of a portion of the S area of ​​the display panel shown.

[0244] Figure 3 for Figure 1 and Figure 2 The diagram shown is a cross-sectional view of a portion of the structure of a sub-pixel area in a display panel under one design, which may be a corresponding Figure 2 The cross section along M1-N1.

[0245] Figure 4 for Figure 1 and Figure 2 The diagram shown is a cross-sectional view of a portion of the structure of a sub-pixel area in a different design of the display panel, which can correspond to... Figure 2 The cross section along M1-N1.

[0246] Figure 5This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0247] Figure 6 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0248] Figure 7 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0249] Figure 8A This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0250] Figure 8B This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0251] Figure 9 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0252] Figures 10 to 13 for Figure 9 The diagram shows the manufacturing process of the display panel.

[0253] Figure 14 This is an enlarged schematic diagram of a portion of the structure of a display panel provided in an embodiment of this disclosure. Its cross-sectional schematic diagram along M2-N2 can be seen as follows: Figure 3 or Figure 4 .

[0254] Figure 15 This is an enlarged schematic diagram of a portion of the structure of a display panel provided in an embodiment of this disclosure. A cross-sectional view along M3-N3 can be seen as follows: Figure 3 or Figure 4 .

[0255] Figure 16 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0256] Figure 17 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0257] Figure 18 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0258] Figure 19 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0259] Figure 20This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0260] Figure 21A This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0261] Figure 21B This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0262] Figure 21C This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0263] Figure 22 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0264] Figure 23A This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0265] Figure 23B This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0266] Figure 23C This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0267] Figure 24 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0268] Figure 25 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0269] Figure 26A This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0270] Figure 26B This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0271] Figure 27 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0272] Figure 28A This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0273] Figure 28B This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0274] Figure 29 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0275] Figure 30 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0276] Figure 31 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0277] Figure 32 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0278] Figure 33 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0279] Figure 34A This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0280] Figure 34B This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0281] Figure 35A This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0282] Figure 35B This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0283] Figure 36 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0284] Figure 37 This is an enlarged view of a portion of the structure of a pixel of a display panel provided in an embodiment of this disclosure.

[0285] Figure 38 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0286] Figure 39 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0287] Figure 40 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0288] Figure 41This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0289] Figure 42 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0290] Figure 43 This is a cross-sectional view of a portion of the structure of a display panel provided in an embodiment of the present disclosure.

[0291] Figure 44 This is a schematic diagram illustrating the relationship between pixel density and pixel spacing in a display panel with a pixel arrangement provided in an embodiment of the present disclosure.

[0292] Figure 45 This is a schematic diagram illustrating the relationship between pixel density and pixel spacing in a display panel with another pixel arrangement provided in an embodiment of this disclosure.

[0293] Figure 46 This is an enlarged view of a partial structure of another pixel of a display panel provided in one embodiment of the present disclosure, and its schematic diagram along M4-N4 can be shown as follows. Figure 3 or Figure 4 .

[0294] Figure 47 for Figure 46 A schematic diagram showing the relationship between pixel density and pixel spacing in a display panel with the pixel arrangement shown.

[0295] Figure 48 This is a cross-sectional view of a substrate in a display panel provided in an embodiment of the present disclosure, showing a cross-sectional view of a first type of thin-film transistor included in a pixel driving circuit in one configuration.

[0296] Figure 49 This is a cross-sectional view of a substrate in a display panel provided in an embodiment of the present disclosure, showing cross-sectional views of a first type of thin-film transistor and a second type of thin-film transistor included in a pixel driving circuit.

[0297] Figure 50 This is a cross-sectional view of a substrate in a display panel provided in one embodiment of the present disclosure, showing a cross-sectional view of a first type of thin-film transistor included in a pixel driving circuit in another configuration.

[0298] Figure 51 for Figure 1 The diagram shows a magnified view of the S region of the display panel with a pixel arrangement.

[0299] Figure 52 for Figure 51 The diagram shows a cross-sectional view of the display panel along M5-N5.

[0300] Figure 53 for Figure 1 The diagram shows a magnified view of the S region of the display panel with a different pixel arrangement.

[0301] Figure 54 for Figure 53 The diagram shows a cross-sectional view of the display panel along M6-N6 under a structural design.

[0302] Figure 55 for Figure 53 The diagram shows a cross-sectional view of the display panel along M6-N6 under another structural design.

[0303] Explanation of reference numerals in the attached figures:

[0304] 100 - Substrate; 200 - Light-emitting device; 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 (blocking portion); 330 - Pixel Defining layer; 340-Connector; 400-Color conversion layer; 410-Color conversion unit; 510-First encapsulation layer; 520-Second encapsulation layer; 530-Third encapsulation layer; 500-Photoresist pattern; 600-Filling layer; 710-Light extraction layer; 711-Light extraction unit; 720-Light control layer; 721-Light control unit; 810-Shielding part; 820-Filtering unit; 910-Protective layer; 911-Protective unit. Detailed Implementation

[0305] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0306] In display products, some functional film layers in light-emitting devices are formed by vapor deposition. Each light-emitting device has multiple functional film layers, and the materials of some functional film layers (such as the light-emitting layer) in light-emitting devices that emit different light are different. Therefore, when these functional film layers are vapor deposited through a mask (such as a fine metal mask, FMM), multiple alignments are required. In order to solve the positional offset problem caused by alignment accuracy error, sufficient space (safety margin related to alignment error) needs to be reserved between different light-emitting devices to ensure that the actual light-emitting area of ​​the light-emitting device can have a certain overlap with the design position (design area). This is equivalent to compressing the design area of ​​the light-emitting area of ​​the light-emitting device, which not only limits the light-emitting area of ​​the light-emitting device, but also prevents the arrangement density of the light-emitting devices (corresponding to sub-pixels) from being further increased, thus making it difficult to further improve the pixel density of the display panel.

[0307] In this disclosure, by setting an isolation structure at the gap between the light-emitting devices, the functional film layers of adjacent light-emitting devices are separated. Thus, in the evaporation process of multiple functional film layers, only the entire display panel needs to be evaporated, without using a mask to evaporate the area where the light-emitting devices are located to form the functional film layers. Therefore, the evaporation process using the isolation structure does not need to consider the alignment accuracy during evaporation, thereby allowing the gap between the light-emitting devices to be designed to be smaller, increasing pixel density (the principle of which can be found below). Figures 10 to 13 (Related descriptions in the relevant embodiments).

[0308] In the above design, the isolation structure surrounds the light-emitting device. However, during the evaporation process, due to the evaporation angle of the evaporation source used to deposit the functional films, the height and width of the isolation structure affect the distribution of the evaporated films. The luminous efficiency of the light-emitting area of ​​the device is related to the evaporation quality of these functional films. Because of the evaporation angle and the obstruction of the evaporation material by the isolation structure, the thickness of the functional films (such as the first functional layer, the light-emitting layer, the second light-emitting layer, and the second electrode) gradually decreases at the edges, thus affecting the luminous efficiency. Therefore, the portion of the functional film with uniform thickness is distributed as much as possible within the light-emitting area to ensure high luminous efficiency at any position within the light-emitting area, resulting in uniform light emission overall. Thus, the portion of the functional film with uniform thickness (the effective functional area described below) limits the design boundary of the light-emitting area (not necessarily overlapping). That is, the boundary of the effective functional area can be obtained first to further determine the boundary of the main light-emitting area (with uniform luminous efficiency and capable of emitting high-quality light).

[0309] It should be noted that the effective functional area is limited by the light-emitting functional layer, while the light-emitting area and main light-emitting area of ​​the display device are jointly limited by the light-emitting functional layer and the first electrode. For example, taking the light-emitting functional layer as the basis for defining the effective functional area, the area where the thickness of the light-emitting functional layer is uniform is the effective functional area; the area where the first electrode and the light-emitting functional layer in the light-emitting device contact each other corresponds to the light-emitting area of ​​the light-emitting device; the area where the first electrode and the effective functional area overlap and contact each other is the main light-emitting area of ​​the light-emitting device (this area emits light uniformly).

[0310] When designing the dimensions of light-emitting devices and isolation structures, how to plan parameters such as the height and width of the isolation structure based on the evaporation angle and the distribution position of functional film layers, so as to maintain good luminous efficiency of light-emitting devices while having a relatively smaller gap between light-emitting devices to increase PPI, has become an important research topic in display panel structure design.

[0311] Furthermore, for display panels with different display modes and specific functional requirements in the display panel, the isolation structure may be modified or other functional structures (such as the color conversion layer in the following embodiment) may be set based on the isolation structure. In this case, the height, parameters, etc. of the isolation structure need to be adjusted so as to reduce manufacturing costs, reduce related errors, and improve the pixel density of the product when forming these functional structures with the help of the isolation structure.

[0312] Embodiments of this disclosure provide a display panel to at least address some of the aforementioned technical 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 devices, each light-emitting device including a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked on the substrate. The light-emitting functional layer includes an effective functional area, and the portion of the first functional layer located within the effective functional area has a uniform film thickness. The isolation structure includes a partition portion located on the substrate and surrounding the light-emitting functional layer. The partition portion includes a first end facing the substrate and a second end facing away from the substrate. The orthographic projection of the effective functional area onto the substrate is outside the orthographic projection of the second end of the isolation structure onto the substrate. The orthographic projection of the edge of the first functional layer onto the substrate is outside the orthographic projection of the first end onto the substrate and inside the orthographic projection of the second end onto the substrate. On a cross section perpendicular to the substrate, and on the same side of the isolation structure, the acute angle formed by the straight line defined by the edge of the first functional layer and the edge of the second end with the surface where the substrate is located is the second tilt angle. The tangent of the acute angle formed by the straight line defined by the edge of the effective functional area and the edge of the second end with the surface where the substrate is located is not greater than the tangent of the second tilt angle. Furthermore, the height difference between the edge of the first end and the edge of the second end in the direction perpendicular to the surface where the substrate is located, and the ratio of the distance between the edge of the first end and the edge of the second end in the direction parallel to the surface where the substrate is located, are not greater than the tangent of the second tilt angle.

[0313] When faced with specific pixel density design requirements, the width of the main light-emitting area of ​​the light-emitting device (referred to as the sub-pixel width) and the gap between adjacent main light-emitting areas can be directly calculated. The width of the main light-emitting area 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 defined, the selectable range of the boundary position of the main light-emitting area can be inferred. Based on the design in the above embodiments of this disclosure, the first evaporation angle is determined by 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 by the first evaporation angle and the height of the second end. Based on the principle that the first functional layer is isolated by the partition, the distance between the extension position and the second end can be inferred, so as to infer the selectable range of the edge position of the second end. In this way, the relationship between 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 evaporation angle can be constructed. Combined with the selectable range of the width dimension of the first end (there is a lower limit value), the selectable width range of the effective functional area can be deduced, and the selectable width range of the main light-emitting area (including the maximum width) can be inferred. Thus, under specific pixel density design requirements, the maximum design width of the main light-emitting area can be obtained to ensure the design area of ​​the main light-emitting area under the actual process (the width under this area can be equal to the maximum design width or slightly smaller than the maximum design width).

[0314] It should be noted that, since alignment accuracy may need to be considered during the fabrication of the isolation structure, the design width of the main light-emitting area can be chosen to be slightly smaller than the maximum design width calculated in the above manner, so as to provide a safety margin for the alignment accuracy error of the isolation structure. In addition, according to the above design, it can also be concluded that the boundary of the effective functional area is determined by the design parameters of the isolation structure and the evaporation angle. When the position of the isolation structure is fixed, the position of this boundary will not be affected by the alignment accuracy during evaporation.

[0315] The structure of a display panel according to at least one embodiment of the present disclosure will now be described in detail with reference to the accompanying drawings. Furthermore, in these drawings, a spatial Cartesian coordinate system is established with the substrate as a reference to more intuitively present the positional relationships of the relevant structures in the display panel. In this 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. It should be noted that the "up" and "down" orientations can be determined based on the substrate. For example, the direction of the substrate facing the display side (e.g., the side of the light-emitting device facing away from the substrate) represents the "up" direction, while the direction of the substrate facing away from the display side represents the "down" direction. For example, if the first object is located between the second object and the substrate, then the second object is above the first object, and the first object is below the second object.

[0316] like Figures 1 to 3 As shown, the planar area of ​​the display panel 10 can be divided into a display area 11 and a border area 12 surrounding the display area 11. The display area 11 can contain sub-pixels (also called sub-pixels, etc.), such as R, G, and B. The physical structure of each sub-pixel can be a light-emitting device. Adjacent sub-pixels emitting light of different colors can form a pixel P (also called a pixel unit, large pixel, etc.). The density of pixel P in the display area 11 represents the pixel density. It should be noted that in some embodiments of this disclosure, some traces in the border area 12 can be routed into the display area 11, thereby allowing the border area 12 to be designed as a single-sided border.

[0317] At least in the display area 11, the physical structure of the display panel 10 may include a substrate 100 and a display functional layer and an isolation structure 300 located on the substrate 100. The display functional layer includes a plurality of light-emitting devices 200. The light-emitting device 200 includes 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 includes an effective functional area 202 and a first functional layer 221.

[0318] For example, the light-emitting functional layer may further include a light-emitting layer 222 and a second functional layer 223, with the first functional layer 221, the light-emitting layer 222, and the second functional layer 223 sequentially stacked 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.

[0319] In the embodiments of this disclosure, without considering the influence of the film thickness of the second electrode 230 on the luminous efficiency and luminous uniformity of the light-emitting layer, the "effective functional region" is a region where at least a portion of the film layer of the light-emitting functional layer has a uniform thickness. The type of the "at least a portion of the film layer" can be selected according to the actual process requirements. For example, the "at least a portion of the film layer" 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, only the first functional layer 221 has a uniform thickness in the effective functional region, or the first functional layer 221 and the light-emitting layer 222 have uniform thicknesses in the effective functional region, or the first functional layer 221, the light-emitting layer 222, and the second functional layer 223 all have uniform thicknesses in the effective functional region.

[0320] For example, in at least one embodiment of this disclosure, the first electrode may be configured as an anode and the second electrode may be configured as a cathode.

[0321] The isolation structure 300 includes a partition portion located on the substrate 100. The partition portion defines a plurality of first openings 301. The light-emitting functional layer 220 and the second electrode 230 are located in the first openings 301. The partition portion includes a conductive portion, and the second electrode 230 is connected to the conductive portion of the partition portion. Thus, the overall structure of the partition portion will present a mesh-like shape, and the first openings 301 are the mesh openings. It should be noted that the first opening 301 is the space enclosed by the partition portion. The edge of the first opening 301 can be determined according to the specified height position (different distances to the substrate 100). For example, when the width of the first end 310 is less than the width of the second end 320, the opening width defined by the edge of the first opening 301 at the edge of the first end 310 is greater than the opening width defined by the edge of the second end 320.

[0322] The partition portion is wider at the top and narrower at the bottom, so that the first functional layer 221 is disconnected from other parts formed on the partition portion during the vapor deposition process due to the shielding of the isolation structure. For example, the orthographic projection of the first end 310 of the partition portion facing the substrate onto the substrate 100 is located within the orthographic projection of the second end 320 of the partition portion facing away from the substrate 100 onto the substrate 100. Thus, the orthographic projection of the edge of the first functional layer 221 onto the substrate 100 is located outside the orthographic projection of the first end 310 onto the substrate 100, but within the orthographic projection of the second end 320 onto the substrate 100. That is, the vapor-deposited first functional layer 221 will not be connected to the conductive portion (e.g., the first end 310) of the isolation structure 300. On a cross section perpendicular to the substrate 100, and on the same side of the isolation structure, the acute angle formed by the straight line P1 defined by the edge of the second end 320 and the edge of the first functional layer 221 and the plane where the substrate 100 is located (parallel to the straight line P0) is the second tilt angle Θ2. When the boundary of the effective functional region 202 is defined by the edge of the uniform thickness portion of the first functional layer 221, the acute angle determined by the straight line P2 and the straight line P0 defined by the edge of the uniform thickness portion of the first functional layer 221 and the edge of the second end 320 is equal to the second tilt angle Θ2. Correspondingly, the acute angle formed by the straight line P3 defined by the edge of the effective functional region 202 and the edge of the second end 320 and the surface where the substrate 100 is located is also the second tilt angle Θ2.

[0323] It should be noted that the surface where the substrate is located is a virtual plane, corresponding to the surface of the planar structure that can support the substrate. In the accompanying drawings of this specification, some angles are indicated by means of planes or lines parallel to a plane or line, with angles of equal size. For example, the second tilt angle is indicated by means of line P0 corresponding to a plane parallel to the surface where the substrate is located.

[0324] The tangent of the acute angle formed by the straight line defined by the edge of the effective functional region 202 and the edge of the second end 320 and the surface where the substrate 100 is located is not greater than the tangent of the second tilt angle Θ2. Under this relationship, the film thickness of the first functional layer 221 in the effective functional region 202 can be guaranteed to be uniform. In this "equal to" relationship, the edge of the first functional region 221 defines the boundary of the effective functional region 202.

[0325] For example, the ratio of the height difference h1 between the edges of the first end 310 and the second end 320 in the direction perpendicular to the surface of the substrate 100, to the ratio of the first width L2 between the edges of the first end 310 and the second end 320 in the direction parallel to the surface of the substrate, is not greater than the tangent of the second tilt angle Θ2, tanΘ2, i.e., L2≥h1 / tanΘ2. Thus, in actual manufacturing, the isolation effect of the isolation structure on the first functional layer 221 can be guaranteed, and the film thickness of the portion of the first functional layer 221 located in the effective functional region 202 can be ensured to be uniform. For example, when the boundary of the effective functional region 202 is defined by the edge of the uniform thickness portion of the first functional layer 221, if L2 = h1 / tanΘ2, then the boundary of the first functional layer 221 just extends to the edge of the first end 310. Here, as the thickness of the film gradually decreases, the thickness of the first functional layer 221 is infinitely close to zero (infinite resistance). If L2 > h1 / tanΘ2, then the first functional layer 221 and the first end 310 do not contact each other and there is a gap between them. Accordingly, the isolation structure completely isolates the first functional layer 221.

[0326] For example, the second tilt angle Θ2 is actually the evaporation angle when the first functional layer 221 is evaporated. Since the first functional layer 221 needs to be spaced from the isolation structure, it needs to have a relatively small design size. Also, given that the larger the evaporation angle, the greater the distance between the edge of the first functional layer 221 and the isolation structure, 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., in the direction parallel to the X-axis) has a relatively small design size, thereby reducing the spacing of the light-emitting devices 200. Therefore, in some embodiments, the second tilt angle Θ2 can correspond to the largest possible evaporation angle of the evaporation source.

[0327] It should be noted that the "evaporation angle" is the acute angle formed by the straight line corresponding to the boundary of the material radiation range of the evaporation source and the plane where the substrate is located. In other words, it can be considered that when evaporation is performed at a certain evaporation angle, the range reached by the evaporation material will not exceed the boundary of the corresponding evaporation angle due to the obstruction of the isolation structure.

[0328] In the embodiments of this disclosure, the orthographic projection of the effective functional area 202 on the substrate 100 is outside the orthographic projection of the second end 320 on the substrate 100, and the acute angle formed by the straight line P3 defined by the edge of the effective functional area 202 and the edge of the second end 320 and the surface of the substrate 100 (parallel to line P0) is less than or equal to the second tilt angle Θ2. Figure 3 The diagram illustrates the case where the height difference between the outer edges of the first end 310 and the second end 320 is h1, and the lateral spacing between the edge of the effective functional area 202 and the edge of the second end 320 (referred to as the second spacing here based on the scheme of the following embodiment) is L1. Lines P1 and P2 determine the distribution boundary of the vapor deposition material under the obstruction of the second end 320 when the vapor deposition source is at different positions. When L1 = h1 / tanΘ1 is satisfied, the angle between P3 and P0 is equal to Θ1.

[0329] It should be noted that the outer edge of the first end 310 can also be referred to as the edge of the first end 310, and the outer edge of the second end 320 can also be referred to as the edge of the second end 320.

[0330] It should be noted that "H" represents 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 film layer. For example, for a... Figure 3 If the thickness of the first electrode 210 is ignored in the structure shown (e.g., the pixel delimiting layer in the following embodiment), then the bottom of the isolation structure and the outer edge of the first functional layer 221 are approximately on the same layer. Therefore, the above formula L1 = h1 / tanΘ1 can be replaced with L1 = H / tanΘ1. If the thickness of the first electrode 210 is calculated, then the thickness of the first electrode 210 needs to be subtracted from "H" in the above formula L1 = H / tanΘ1.

[0331] It should be noted that when L1 = h1 / tanΘ1, even if the evaporation source and the isolation structure 300 are directly opposite each other (the evaporation angle and evaporation boundary determined by line P2) when the first functional layer 221 is deposited, the evaporated material can still fall in the effective functional area 202. Therefore, the first functional layer 221 in the effective functional area 202 can be deposited at any position with uniform film thickness. In this case, the width of the second spacing L1 is the minimum design width that can ensure the uniform film thickness of the first functional layer 221 in the effective functional area 202. When designing the gap of the light-emitting device 200 based on this minimum design width, it is possible to have a smaller gap between the sub-pixels.

[0332] It should be noted that, in the embodiments of this disclosure, the "uniformity" of the film deposition in a certain area is a macroscopic phenomenon. Specifically, it can mean that a portion of the lower surface and a portion of the upper surface of the corresponding film are parallel to the plane of the substrate, and the film thickness is consistent in this area. Alternatively, it can mean that the film is deposited in an area parallel to the substrate and no other structure obstructs the deposition source during the entire deposition process, thus making the film thickness consistent in this area. Unless otherwise specified, the thickness of a certain film mentioned refers to the thickness of the film in this type of area.

[0333] Regarding the first functional layer, if the boundary of the effective functional area is taken as the boundary where the film thickness uniformity of the first functional layer changes, then within the effective functional area, the evaporation of the first functional layer will never be blocked by the partition. However, outside the effective functional area, the evaporation of the first functional layer will be blocked by the partition for a certain period of time (when the relative position of the evaporation source and the display panel changes). The farther away from the effective functional area, the longer the first functional layer is blocked during the evaporation process, resulting in a smaller film thickness. Thus, the "uniformity" of the film layer mentioned in the embodiments of this disclosure ignores the microscopic unevenness that exists in the evaporation of the film layer itself. This microscopic unevenness is limited by the evaporation process conditions and is ubiquitous throughout the entire film layer.

[0334] Furthermore, it should be noted that in the above embodiments, if only the thickness uniformity of the first functional layer in the effective functional area is considered, the edge of the uniform thickness portion of the first functional layer can be taken as the boundary of the effective functional area. Correspondingly, the maximum boundary of the main light-emitting area is also the edge of the uniform thickness portion of the first functional layer.

[0335] It should be noted that, in the embodiments of this disclosure, while ensuring that the partition is wider at the top and narrower at the bottom, there are no restrictions on the way the isolation structure is set. The following is a brief description of several ways the isolation structure is set through embodiments.

[0336] In some embodiments of this disclosure, such as Figure 3As shown, the isolation structure is an integrated structure, meaning it can be an independent film layer without physical interfaces. At least the first end 310 and the second end 320 of the isolation structure are two parts of this integrated structure. For example, further, along a direction perpendicular to the substrate 100, the cross-sectional shape of the portion of the partition located between two adjacent sub-pixels is an inverted trapezoid, with the top edge of the inverted trapezoid facing the substrate 100. That is, the top edge of the inverted trapezoid is located between the substrate 100 and the bottom edge of the inverted trapezoid. Thus, the edge of the surface 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 away from the substrate 100 is the edge of the second end 320. In this design, the sidewalls of the isolation structure are incised, thereby increasing the isolation effect of the isolation structure.

[0337] In other embodiments of this disclosure, such as Figure 4 As shown, the partition includes a support portion and a blocking portion sequentially stacked on the substrate 100. The support portion constitutes a first end portion 310, and the blocking portion constitutes a second end portion 320. For example, further, in a direction perpendicular to the substrate 100, the cross-sectional shape of the portion of the support portion 310 located between two adjacent sub-pixels is a trapezoid, and the blocking 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 portion 310. In this case, it is easier for the vapor deposition material of the second electrode 230 to be deposited on the sidewall of the support portion 310, thereby improving the overlap yield between the second electrode 230 and the support portion 310. For example, even further, in a direction perpendicular to the substrate 100, the cross-sectional shape of the portion of the blocking portion 320 located between two adjacent sub-pixels is a trapezoid, and the edge of the surface of the blocking portion 320 facing the support portion 310 is the edge of the second end portion 320.

[0338] It should be noted that, in the embodiments of this disclosure, the regular and inverted trapezoids mentioned can be strictly regular and inverted trapezoids; or, they can be generally presented shapes, for example, whose top and bottom are parallel or conformal (one side surface rises and falls approximately simultaneously with the other side surface), and the size of the bottom is larger than the size of the top, and the shape of the edges on both sides is approximately axially symmetrical; for example, the shape of its top, bottom and sides may not be limited to being planar.

[0339] In the embodiments of this disclosure, the deposition angle of the second electrode 230 is generally smaller than the aforementioned second tilt angle Θ2, thereby ensuring that the second electrode 230 overlaps with the first end 310. In this case, if the film thickness of the second electrode 230 in the effective functional region 202 is to be uniform, the minimum dimension of the second spacing L1 needs to be defined.

[0340] For example, such as Figure 5As shown, on a cross section perpendicular to the substrate 100 and on the same side of the isolation structure 300, the acute angle formed by the straight line P4, defined by the edge of the second electrode 230 and the edge of the second end 320, and the surface where the substrate 100 is located, is a first tilt angle Θ1, which is smaller than the second tilt angle Θ2. The acute angle formed by the straight line P3, defined by the edge of the effective functional area 202 and the edge of the second end 320, and the surface where the substrate 100 is located (e.g., the line P0 included therein), is less than or equal to 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, in Figure 5 L2 and Figure 4 When the L2 values ​​are approximately equal, Figure 5 The second spacing L1 in the middle will be greater than Figure 4 The second spacing L1 in the middle.

[0341] The first tilt angle Θ1 is actually the evaporation angle when the second electrode 230 is evaporated. The smaller the evaporation angle, the larger the contact area between the edge of the second electrode 230 and 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., in the direction parallel to the X-axis) can be allowed to be a relatively small size, thereby reducing the spacing between adjacent light-emitting devices 200. Therefore, in some embodiments, the first tilt angle Θ1 can correspond to the minimum evaporation angle of the evaporation source. The 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 critical position where the thickness of the second electrode 230 begins to be uneven. When the acute angle formed by line P3 and line P0 is less than or equal to the first tilt angle Θ1, the critical position of uneven thickness will coincide with the position where line P3 intersects with the second electrode 230, or be located between the position where line P3 intersects with the second electrode 230 and the isolation structure. This ensures that all film layers in the second electrode 230 and the light-emitting functional layer 220 have a uniform film thickness distribution in the effective functional area 202. This allows for the minimum designable size of the second spacing L1 in the lateral direction between the edge of the effective functional area 202 and the edge of the second end 320. Accordingly, the minimum spacing L between adjacent effective functional areas 202 can be obtained as much as possible, thereby maintaining the isolation of the first functional layer 221 by the isolation structure 300 while increasing the pixel density.

[0342] In some embodiments of this disclosure, without considering the contact area between the light-emitting functional layer and the anode (e.g., the anode is designed to have sufficient contact area with the light-emitting functional layer), the effective functional region can be defined solely by the boundaries of the uniformly thick portions of the relevant film layers (e.g., the first functional layer or all film layers) within the light-emitting functional layer. The second electrode only needs to ensure it can provide charge carriers (e.g., electrons) to the light-emitting functional layer. If the thickness is sufficient, even if the second electrode exhibits uneven thickness, it can be considered that the uneven thickness will not affect the uniformity of the light emission efficiency of the light-emitting device.

[0343] In other embodiments of this disclosure, given the requirement for increased light transmittance of the second electrode, its thickness is limited. Therefore, in some solutions, it is necessary to make the thickness of the portion of the second electrode located in the main light-emitting region as uniform as possible. For example, if the film thickness of the portion of the second electrode overlapping with the effective functional region is to be uniform, the boundary of the effective functional region can be further defined by the edge of the uniformly thick portion of the second electrode. In this case, the area of ​​the effective functional region will be smaller than the area of ​​the uniformly thick portion in the light-emitting functional layer (e.g., the area of ​​the uniformly thick portion of the light-emitting layer and the area of ​​the uniformly thick portion of the first functional layer). In this case, the thickness of both the light-emitting functional layer and the second electrode is uniform in the effective functional region, and correspondingly, the maximum boundary of the main light-emitting region is also the edge of the uniformly thick portion of the second electrode.

[0344] In at least one embodiment of this disclosure, the evaporation angles of the films located on the first functional layer 221, such as the light-emitting layer and the second functional layer 223, are generally less than or equal to the evaporation angle of the first functional layer 221, so that these films can cover the first functional layer 221 and prevent the first functional layer 221 from being directly connected to the second electrode 230. In this case, taking the evaporation angle of the light-emitting layer as being less than the evaporation angle of the first functional layer 221 as an example, if the width of the second spacing L1 can ensure that the film thickness of the light-emitting layer is uniform in the effective functional region 202, then the first functional layer 221 can have a uniform film thickness in the effective functional region 202; furthermore, taking the tilt angle corresponding to the edge of the second functional layer 223 as being less than the tilt angle corresponding to the edge of other films in the light-emitting functional layer as an example, if the width of the second spacing L1 can ensure that the film thickness of the second functional layer 223 is uniform in the effective functional region 202, then the first functional layer 221, the light-emitting layer, and other films can have a uniform film thickness in the effective functional region 202.

[0345] It should be noted that, in the embodiments of this disclosure, the tilt angle corresponding to the edge of the film layer is the acute angle at which the line connecting the edge of the film layer and the edge of the second end intersects the surface where the substrate is located.

[0346] It should be noted that the light-emitting layer is the main film layer for excitation light in the light-emitting functional layers, and is the basic functional layer. Therefore, compared with other film layers, the film quality of the light-emitting layer has a relatively greater impact on the luminous efficiency of the light-emitting device. Therefore, in actual manufacturing processes, it is necessary to ensure that the film thickness of the light-emitting layer is uniform within the effective functional region; that is, the edge of the uniformly thick portion of the light-emitting layer can be used as the boundary of the effective functional region. In this case, the area of ​​the effective functional region will not be greater than the area of ​​the uniformly thick portion of the first functional layer 221.

[0347] It should be noted that when the evaporation angle of the light-emitting layer is less than or equal to the evaporation angle of the first functional layer 221, the minimum limit (minimum area) of the boundary of the light-emitting layer is at the boundary 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 uniform thickness portion of the first functional area 221. Therefore, at least when calculating the limit value of pixel density, the position of the effective functional area can still be defined by the position of the edge of the uniform thickness portion of the first functional layer 221.

[0348] It should be noted that, in the embodiments of this disclosure, the boundary of the uniform thickness portion of the light-emitting layer can be used as the boundary of the main light-emitting area of ​​the light-emitting device. For example, when the corresponding evaporation angle of the light-emitting layer is equal to the evaporation angle of the first functional layer 221, the boundary of the main light-emitting area, the boundary of the effective functional area, the boundary of the uniform thickness portion of the light-emitting layer, and the boundary of the uniform thickness portion of the first functional layer 221 coincide; or, when the corresponding evaporation angle of the light-emitting layer is less than the evaporation angle of the first functional layer 221, the boundary of the uniform thickness portion of the light-emitting layer is the boundary of the main light-emitting area of ​​the light-emitting device, and the boundary of the uniform thickness portion of the first functional layer 221 is the boundary of the effective functional area.

[0349] In at least one embodiment of this disclosure, the light-emitting layer 222, the second functional layer 223, etc., do not need to have good contact with the isolation structure or should avoid contact with the isolation structure. Therefore, the evaporation angle of the light-emitting layer 222, the second functional layer 223, etc., is generally larger than the evaporation angle of the second electrode 230. In this case, if the width of the second spacing L1 can ensure that the second electrode 230 has a uniform film thickness in the effective functional region 202, then 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 a uniform film thickness in the effective functional region 202. That is, if the edge of the uniform film thickness portion of the second electrode 230 is used to define the boundary of the effective functional region, then the film thickness of each film layer in the light-emitting functional layer is uniform in the effective functional region.

[0350] In at least one embodiment of this disclosure, such as Figure 5As shown, on a cross section perpendicular to the substrate 100 and on the same side of the isolation structure 300, the straight line defined by the edge of the first end 310 facing the surface of the substrate 100 and the edge of the second end 320, forms an acute angle with the plane (or line P0) where the substrate 100 is located that is not less than the first tilt angle Θ1 and not greater than the second tilt angle Θ2, i.e., h1 / tanΘ1≤L2≤h1 / tanΘ2. In this way, the minimum designable size of the first width L2 in the lateral direction of the edge of the first end 310 and the edge of the second end 320 can be obtained as much as possible, thereby further obtaining the minimum spacing between adjacent effective functional regions 202, thereby maintaining the isolation of the first functional layer 221 by the isolation structure 300 while further improving the arrangement density of the light-emitting devices (equivalent to pixel density).

[0351] For example, in some embodiments of this disclosure, such as Figure 5 As shown, the straight line defined by the edge of the first end 310 facing the surface of the substrate 100 and the edge of the second end 320 forms an acute angle with the surface (or P0) where the substrate 100 is located, which is equal to the first tilt angle Θ1, so that the second electrode 230 just contacts the first end 310. In this case, it can be considered that the second electrode 230 and the first end 310 are electrically connected.

[0352] For example, in other embodiments of this disclosure, such as Figure 6 As shown, the straight line P6 defined by the edge of the first end 310 facing the surface of the substrate 100 and the edge of the second end 320 forms an acute angle greater than the first tilt angle Θ1 with the surface (or P0) where the substrate 100 is located, so that the second electrode 230 can climb to the side surface of the first end 310, that is, the second electrode 230 overlaps and contacts at least partially with the side surface of the first end 310, for example... Figure 6 The climbing height is shown as h0. This ensures the overlap between the second electrode 230 and the first end 310 of the isolation structure 300, and also ensures that the overlap portion of the second electrode 230 with the isolation structure 300 has a relatively large thickness to prevent poor contact or excessive resistance at the overlap. It should be noted that in this case, the dimension of L2 is: L2 = (h1 - h0) / tanΘ2.

[0353] In some embodiments of this disclosure, the minimum value of L1+L2 can be obtained by comprehensively considering the critical ranges of L1 and L2, in order to further reduce the optional minimum size of the sub-pixel gap. For example, see again Figure 5The acute angle formed by the straight line P3, defined by the edge of the effective functional region 202 and the edge of the second end 320, and the surface of the substrate 100 (e.g., the line P0 included therein), is equal to the first tilt angle Θ1. The acute angle formed by the straight line P6, defined by the edge of the first end 310 facing the surface of the substrate 100 and the edge of the second end 320, and the surface of the substrate 100, is equal to the second tilt angle Θ2. That is, L1 = h1 / tanΘ2 and L2 = h1 / tanΘ1. In this way, while ensuring that the film thickness of each film layer of the light-emitting device is uniform in the effective functional region 202, the second spacing L1 in the lateral direction between the edges of the effective functional region 202 and the edges of the second end 320, and the first width L2 in the lateral direction between the edges of the first end 310 and the edges of the second end 320 are both minimized. This minimizes the spacing between adjacent effective functional regions 202, thereby maintaining the isolation of the first functional layer 221 by the isolation structure 300 while maximizing the arrangement density (equivalent to pixel density) of the light-emitting device 200. It should be noted that in this scheme, the edge of the first functional layer 221 will just be in contact with the isolation structure (such as its first end 310). However, at the contact position, the thickness of the first functional layer 221 will theoretically be infinitely close to zero, so that the resistance at the contact position is infinitely large. The current will not pass through the first functional layer 221 into the isolation structure 300. That is, the isolation structure 300 actually still electrically isolates the adjacent first functional layer 221, thereby avoiding current leakage that would reduce the luminous efficiency of the display panel.

[0354] It should be noted that, in cases such as Figure 5 In the illustrated embodiment, the thickness of each film layer in the first electrode 210 and the light-emitting functional layer 220 is ignored in the formula L1 = h1 / tanΘ2, and the formula L1 = h1 / tanΘ1 can be replaced with L1 = H / tanΘ1. If the thickness of the first electrode 210 and the light-emitting functional layer 220 is calculated, then the "H" in the above formula L1 = H / tanΘ1 needs to be subtracted from the thickness of the first electrode 210 and the light-emitting functional layer 220.

[0355] In some embodiments of this disclosure, such as Figure 6 As shown, the isolation structure 300 can be directly disposed on the substrate 100. In this case, the size of the first electrode 210 needs to avoid overlapping with the isolation structure 300 to avoid leakage and reduce luminous efficiency. In this case, the first electrode 210 defines the boundary of the effective functional area 202, that is, the effective functional area 202 coincides with the first electrode 210.

[0356] In other embodiments of this disclosure, such as Figure 7As shown, the display panel includes a pixel defining layer 330, which is located between the isolation structure (e.g., the support portion 310) and the layer containing the first electrode 210, to cover the gap (region L4) between adjacent first electrodes 210. The pixel defining layer 330 defines a second opening 302, which is covered by the light-emitting functional layer 220. The second opening 302 corresponds to and communicates with the first opening 301, and the orthographic projection of the second opening 302 on the substrate 100 lies within the orthographic projection of the corresponding first opening 301 on the substrate 100. By designing the pixel defining layer 330, the risk of the first electrode 210 overlapping with the adjacent isolation structure (e.g., the first end 310 in which it is conductive) can be eliminated, thereby allowing the first electrode 210 to have a larger design size to ensure the design area of ​​the effective functional area 202.

[0357] The pixel defining layer 330 defines the exposed area of ​​the first electrode 210 (the area of ​​the portion in contact with the light-emitting functional layer 220), thereby defining the boundary of the light-emitting area of ​​the light-emitting device 200. It should be noted that if the thicknesses of the various film layers of the light-emitting functional layer 220 are uneven within the light-emitting area, it will lead to uneven light extraction efficiency. Therefore, the light-emitting area of ​​the light-emitting device can be designed within or overlap with the effective functional area of ​​the light-emitting functional layer 220 to ensure uniform light extraction throughout the entire light-emitting area.

[0358] It should be noted that when designing the pixel density of a display panel, the parameters L1, L2, and h1(H) mentioned above can be determined simultaneously when determining the size of the effective functional area (or further, the main light-emitting area). Based on this, the specific location of the boundary of the pixel defining layer 330 can then be determined. For example, the minimum boundary (minimum size of the second opening 302) of the pixel defining layer 330 is the boundary of the effective functional area. In this case, when designing the PPI of the display panel, the specific location (size) of the pixel defining layer 330 does not need to be considered before determining the size and location of the effective functional area, thereby reducing the number of structures involved in the design and lowering the design cost of the display panel.

[0359] It should be noted that, in some embodiments of this disclosure, based on considerations of the process precision (e.g., mask alignment precision) of forming the second opening in the pixel defining layer, the area of ​​the second opening can be designed to be slightly larger than the area of ​​the effective functional area, that is, the orthographic projection of the effective functional area on the substrate is located within the orthographic projection of the second opening on the substrate, so as to set sufficient alignment safety margin, thereby ensuring that the portion of the light-emitting functional layer located in the effective functional area can contact the first electrode; or, the area of ​​the second opening can be designed to be smaller than the area of ​​the effective functional area, so that the thickness of the portion of the light-emitting functional layer in the second opening is uniform, so that the light-emitting area of ​​the light-emitting device can emit light uniformly.

[0360] In some embodiments of this disclosure, such as Figure 8A As shown, the sidewall of the pixel defining layer 330 can be configured as a sloped surface with a certain gradient. On the same side of the isolation structure 300, the boundary of the effective functional area is determined by the boundary of the uniformly thick portion of the second electrode 230. That is, the edge of the surface of the pixel defining layer 330 facing the substrate 100 can substantially coincide with the boundary of the effective functional area. In other words, the angle between the edge of the surface of the pixel defining layer 330 facing the substrate 100 and the second end 320 is equal to the first tilt angle Θ1. Furthermore, it can be further designed such that the acute angle formed by the straight line defined by the edge of the pixel defining layer 330 facing away from the substrate 100 and the edge of the second end 320, and the surface where the substrate 100 is located, is equal to the second tilt angle Θ2. That is, the first functional layer 221 begins to show uneven thickness at the edge of the pixel defining layer 330 facing away from the substrate 100. Due to the requirement of light transmittance, the overall thickness of the second electrode 230 is relatively small, which makes the second electrode 230 prone to problems such as excessively low film thickness, breakage, and poor continuity in areas with large slopes. The design described above allows the second pitch L1 to have a relatively small size while the sidewall of the pixel defining layer 330 has a relatively small slope, making it easier for the second electrode 230 to be deposited on the sidewall of the pixel defining layer 330 and thus having a relatively large film thickness, so as to avoid poor film continuity or even breakage of the second electrode 230 due to step difference.

[0361] For example, in some other embodiments of this disclosure, it is possible to... Figure 8A The structure shown is modified to obtain Figure 8B Specifically, such as Figure 8BAs shown, the boundary of the effective functional area is determined by the boundary of the uniform thickness portion of the light-emitting layer. Therefore, the edge of the surface of the pixel defining layer 330 facing the substrate 100 can be designed to substantially coincide with the boundary of the effective functional area. That is, the angle between the edge of the surface of the pixel defining layer 330 facing the substrate 100 and the second end 320 (defined between the second tilt angle Θ2 and the first tilt angle Θ1) is equal to the angle between the edge of the light-emitting layer and the straight line P3 defined by the second end 320 and the surface where the substrate 100 is located. In this case, the boundary of the uniform thickness portion of the first functional layer 221 coincides with the edge of the surface of the pixel defining layer 330 facing the substrate 100 (in this case, the evaporation angles corresponding to the first functional layer 221 and the light-emitting layer are equal), or is located on the side surface of the pixel defining layer 330 or on the surface away from the substrate 100 (in this case, the evaporation angle corresponding to the first functional layer 221 is greater than the evaporation angle corresponding to the light-emitting layer). Furthermore, the design can be further configured such that the acute angle formed by the straight line defined by the edge of the pixel defining layer 330 away from the surface of the substrate 100 and the edge of the second end 320, and the surface where the substrate 100 is located, is equal to the second tilt angle Θ2. That is, the first functional layer 221 begins to exhibit uneven thickness at the edge of the pixel defining layer 330 away from the surface of the substrate 100. Due to the requirement of 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 film thickness, breakage, and poor continuity in areas with large slopes. The design described above in this disclosure allows the second pitch L1 to have a relatively small size while the sidewall of the pixel defining layer 330 has a relatively small slope, making it easier for the second electrode 230 to be deposited on the sidewall of the pixel defining layer 330 and have a relatively large film thickness, thereby avoiding poor continuity or even breakage of the film layer due to step differences in the second electrode 230.

[0362] For example, in at least one embodiment of this disclosure, such as Figure 8A As shown, the portion of the pixel defining layer 330 located between two adjacent sub-pixels has a trapezoidal cross-sectional shape perpendicular to the substrate 100. On the same side of the isolation structure 300, the acute angle formed by the straight line defined by the edge of the pixel defining layer 330 facing the substrate 100 and the edge of its second end, and the surface where the substrate 100 is located, is equal to the first tilt angle Θ1. The boundary of the second opening 302 of the pixel defining layer 330 coincides with the boundary of the effective functional area, thereby ensuring that the light-emitting area of ​​the light-emitting device 200 coincides with the effective functional area. This allows the light-emitting portion of the light-emitting area to have maximum luminous efficiency, thus improving light emission uniformity. Correspondingly, this design can ensure the maximum luminous efficiency of the light-emitting device 200 while obtaining the extendable range of the pixel defining layer 330 boundary, thus obtaining the maximum design width of the pixel defining layer 330 (the width of the portion between two adjacent first openings 301), which is beneficial for planning the width of the pixel gap (the gap between the light-emitting areas of adjacent light-emitting devices 200).

[0363] In the embodiments of this disclosure, the pixel defining layer 330 is mainly used to separate the first electrode 210 and the isolation structure 300, and does not need to limit the light-emitting functional layer 220. This allows the pixel defining layer 330 to be designed with a smaller thickness, which not only reduces the step difference at the boundary of the pixel defining layer 330 (excessive step difference would lead to poor film quality), but also facilitates the thinner design of the display panel. However, a thinner pixel defining layer 330 will form a conformal groove at the gap between adjacent first electrodes 210, which may affect the quality of subsequent film layers.

[0364] For example, such as Figure 7 As shown, the portion of the pixel defining layer 330 covering the gap of the first electrode 210 (which, when combined with the substrate 100, forms a groove) conforms to the gap of the first electrode 210 to form a groove. For example, the pixel defining layer 330 is an inorganic material film layer, allowing it to have a relatively thin thickness while maintaining high insulation. For example, the material of the pixel defining layer 330 can be silicon oxide, silicon nitride, silicon oxynitride, etc. The small molecule residues left over from the organic material film-forming process easily generate impurities, resulting in an increased outgassing value. In contrast, the pixel defining layer 330 formed from inorganic materials has more stable chemical properties; therefore, the pixel defining layer 330 in this embodiment can improve the stability of the display panel.

[0365] For example, the thickness of the pixel defining layer 330 can be from 1,000 angstroms to 5,000 angstroms.

[0366] It should be noted that the thickness of the pixel defining layer 330 is the thickness of the portion located between adjacent first electrodes 210, or the thickness of the portion covering the first electrodes 210 (excluding the sidewall portion of the pixel defining layer 330).

[0367] In some embodiments of this disclosure, such as Figure 7 As shown, the gap between the orthographic projections of adjacent first electrodes 210 on the substrate 100 is located within the orthographic projection of the surface of the first end 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 end 310, so that the first end 310 of the isolation structure can cover the groove on the pixel defining layer 330.

[0368] In other embodiments of this disclosure, such as Figure 8AAs shown, the gap between the orthographic projections of adjacent first electrodes 210 on the substrate 100 coincides with the orthographic projection of the surface of the first end 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 end 310. In this way, the minimum designable width of the first end 310 of the isolation structure 300 can be reduced, thereby reducing the minimum spacing between adjacent effective functional regions 202. This maintains the isolation of the first functional layer 221 by the isolation structure 300 while increasing the arrangement density (equivalent to pixel density) of the light-emitting devices 200.

[0369] For example, substrate 100 may include a substrate and a driving circuit layer located on the substrate. The driving circuit layer includes multiple 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 multiple transistors (TFTs), capacitors, etc., and may be formed in various forms such as 2T1C (i.e., 2 transistors (TFTs) and 1 capacitor (C)), 3T1C, or 7T1C. The pixel driving circuit is connected to the light-emitting device 200 to control the switching state and brightness of the light-emitting device 200.

[0370] In at least one embodiment of this disclosure, such as Figure 9 As shown, the display panel may further include a first encapsulation layer 510, which at least covers the light-emitting device 200 to protect the film layer of the light-emitting device 200 during the manufacturing process of the display panel. It should be noted that the light-emitting devices 200 emitting different light are manufactured independently, but the film layer (evaporated film layer, such as the light-emitting functional layer) in each light-emitting device 200 is deposited on the entire surface of the display panel during evaporation. For example, light-emitting devices 200 are classified as light-emitting devices that emit red light (R), green light (G), and blue light (B) respectively. During the fabrication process, light-emitting devices R, G, and B are fabricated sequentially. When fabricating light-emitting device R, a light-emitting device R is formed in each first opening 301. A first encapsulation layer 510 is fabricated on the display panel to cover the light-emitting device R. Then, the first encapsulation layer 510, as well as the second electrode and light-emitting functional layer of the light-emitting device R, are removed from some of the first openings 301 (used to form light-emitting devices G and B in the final product). During this process, the first encapsulation layer 510 is used to protect the light-emitting devices R in other first openings 301. Based on this method, light-emitting devices G and B are then fabricated sequentially, ultimately forming a display panel as shown in the image. Figure 9 The first encapsulation layer 510 is shown below. Next, in conjunction with… Figures 10 to 13 right Figure 9 The manufacturing process of the display panel shown is described.

[0371] It should be noted that the first encapsulation layer 510 has already achieved the effect of encapsulation for the light-emitting device, so it can also be called an encapsulation layer (only one film layer is set) or one of the film layers in the encapsulation layer (when there are multiple encapsulation film layers).

[0372] like Figure 10 As shown, a substrate 100 is provided and an array of first electrodes 210 are formed on the substrate 100; an insulating material film (e.g., an inorganic material film) is deposited on the substrate 100 on which the first electrodes 210 are formed; a support portion 310 and a blocking portion 320 are formed on the display panel; a patterning process is performed on the insulating material film to form a pixel defining layer 330 (with a grid-like planar shape), and the pixel defining layer 330 covers the gaps between adjacent first electrodes 210, thus the planar shape of the pixel defining layer 330 is grid-like.

[0373] In embodiments of this disclosure, the patterning process can be a photolithography patterning process, which may include, for example, coating a structural layer to be patterned with photoresist, exposing the photoresist using a photomask, developing the exposed photoresist to obtain a photoresist pattern, etching the structural layer using the photoresist pattern (optionally wet or dry etching), and then optionally removing the photoresist pattern. It should be noted that when the material of the structural layer (e.g., the photoresist pattern 500 described below) includes photoresist, the structural layer can be directly exposed using a photomask to form the desired pattern.

[0374] like Figure 11 As shown, a light-emitting functional layer and a second electrode are deposited on the substrate 100 by vapor deposition. The vapor deposition source performs vapor deposition at a first vapor deposition angle (second tilt angle) to form the first functional layer 221, and at a second vapor deposition angle (first tilt angle) to form the second electrode 230, so that a light-emitting device 200 is formed in each first opening 301 of the isolation structure 300. No mask is used in this process, so the vapor-deposited material is also deposited on the blocking portion 320. Then, a first encapsulation layer 510 is deposited to cover the light-emitting device 200. For example, the light-emitting layer in the vapor-deposited light-emitting functional layer 220 can correspond to emitted red light; that is, in this stage, a light-emitting device 200 corresponding to emitted red light is formed in each first opening 301 of the isolation structure 300.

[0375] like Figure 12 As shown, a photoresist is formed (e.g., coated) on a substrate 100 on which the first encapsulation layer 510 is formed, and then a patterning process is performed on it to form a photoresist pattern 500, which only covers a portion of the first opening 301.

[0376] like Figure 13As shown, the surface of the display panel is etched to remove the first encapsulation 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.

[0377] Repeat the above Figures 11 to 13 The steps are as follows: to form light-emitting devices 200 emitting green light and light-emitting devices 200 emitting blue light respectively in the other first openings 301, and to form as shown in the figure. Figure 9 The display panel shown.

[0378] It should be noted that in some embodiments of this disclosure, some film layers in the light-emitting functional layer, such as the light-emitting layer, can be prepared using non-evaporation methods, such as inkjet printing. The specific method can be selected according to the material of these film layers. For example, if these film layers are made of polymer materials and evaporation is not applicable, inkjet printing can be used to prepare them.

[0379] In current OLED display panel designs, the deposition of the film layers in the light-emitting devices requires separate fabrication using a mask (e.g., an FMM mask). Due to the precision requirements of multiple alignments, a large sub-pixel gap (the gap between adjacent light-emitting devices, corresponding to the pixel pitch) needs to be reserved. Furthermore, current OLEDs require a relatively thick pixel-defining layer to constrain the light-emitting devices (the embodiments described below are not limited to requiring a pixel-defining layer to constrain the light-emitting devices). The light-emitting devices are completely housed within the opening of this pixel-defining layer. In this case, because the pixel-defining layer is too thick, and to increase the slope of the sidewalls of the opening, the sidewalls of the pixel-defining layer occupy a large space, further increasing the sub-pixel gap. Additionally, due to the limitation of alignment precision, the size of the light-emitting devices themselves is difficult to further reduce. Current OLED display panels, based on FMM technology, struggle to achieve a pixel density exceeding 403 PPI because the width of the sub-pixels is difficult to reduce to below 4 micrometers. More importantly, the minimum sub-pixel gap can only reach 17 micrometers, and achieving 20 micrometers is also relatively difficult.

[0380] The following section provides a detailed explanation of how to increase the pixel density in a display panel to greater than 403 PPI and the specific structure of the display panel under this condition.

[0381] In some embodiments of this disclosure, the display panel includes a substrate, an isolation structure on the substrate, and a plurality of pixels. The isolation structure has a plurality of first openings, and each pixel includes a plurality of sub-pixels emitting light of different wavelengths (meaning each sub-pixel emits a type of light, and different sub-pixels emit light of different wavelengths). Each sub-pixel includes a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked on the substrate. The light-emitting layer of the sub-pixel is disposed within the first opening, and the second electrode is connected to the isolation structure. By setting the isolation structure, the pixel density can be in the range of 90 to 7400 PPI. In the above scheme, for the vapor deposition layer of the sub-pixels, by setting the isolation structure, it is no longer necessary to perform vapor deposition through a mask, thus eliminating the need to consider the alignment accuracy problem during vapor deposition. This allows the spacing between adjacent sub-pixels to be reduced, enabling the display panel to have a higher pixel density. Depending on the specific application scenario, the value can be set to different values ​​in the range of 404-2000 PPI, 2000-7400 PPI, or, of course, to a value in the range of 90-403 PPI according to actual needs. The planar structure of the display panel and the principle of improving PPI can be found in the relevant descriptions in the foregoing embodiments, and will not be repeated here.

[0382] In the embodiments of this disclosure, pixel density can be increased by reducing the width of subpixels, reducing the spacing between subpixels, or simultaneously reducing both the width and spacing of subpixels. The structure of the display panel under the above different selections will be described in detail below through different embodiments.

[0383] In some embodiments of this disclosure, pixel density can be increased by simply reducing the spacing between subpixels. For example, the average width of a subpixel can be designed to be no less than 4 micrometers, and the spacing between subpixels can be designed to be no less than 8 micrometers and no more than 17 micrometers. This can result in a pixel density of 404 PPI to 1058 PPI. Specifically, when the average width of a subpixel is designed to be 4 micrometers and the spacing between subpixels is designed to be 8 micrometers, the pixel density is approximately 706 PPI or 1058 PPI.

[0384] For example, the display functional layer includes multiple light-emitting devices corresponding to sub-pixels. The types and positional relationships of the various film layers within the light-emitting devices, as well as their positional relationships with the isolation structure, can be found in the aforementioned section on... Figures 1 to 3 The relevant descriptions in the related embodiments will not be repeated here. Furthermore, in this embodiment, please refer again to... Figure 4The distance h1 between the edges of the first end 310 and the second end 320 in the direction perpendicular to the substrate 100 is not less than 0.6 micrometers. The width of the first end 310 is not less than 2 micrometers, and the width of the second end 320 is not less than 4 micrometers. On the same side of the isolation structure 300, the second spacing L1 between the orthographic projections of the edges of the effective functional area 202 and the second end 320 onto the substrate 100 is not less than 2 micrometers, so that the gap between sub-pixels is not less than 8 micrometers. For example, further, the second tilt angle is 40 degrees to 70 degrees.

[0385] For example, see again Figure 5 On a cross-section perpendicular to the substrate 100, and on the same side of the isolation structure 300, the acute angle formed by the straight line P4, defined by the edge of the second electrode 230 and the edge of the second end 320, and the surface where the substrate 100 is located, is a first tilt angle Θ1, which is less than a second tilt angle Θ2. The acute angle formed by the straight line P3, defined by the edge of the effective functional area 202 and the edge of the second end 320, and the surface where the substrate 100 is located (e.g., line P0), is less than or equal to the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be between 20 degrees and 70 degrees.

[0386] For example, see again Figure 5 The acute angle formed by the straight line P3, defined by the edge of the effective functional area 202 and the edge of the second end 320, and the surface of the substrate 100 (e.g., the line P0 included therein), is equal to the first tilt angle Θ1. The acute angle formed by the straight line P6, defined by the edge of the first end 310 facing the surface of the substrate 100 and the edge of the second end 320, and the surface of the substrate 100, is equal to the second tilt angle Θ2. That is, L1 = H / tanΘ2 (the calculation of H in this formula ignores the film thickness of the first electrode and the light-emitting functional layer), and L2 = h1 / tanΘ1. 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 on the same side of the isolation structure 300, the second spacing L1 of the orthogonal projection of the edge of the effective functional area 202 and the edge of the second end 320 onto the substrate 100 is 2 micrometers, so that the gap between the sub-pixels is 8 micrometers. For example, further, in each pixel, the average width of the subpixel is 4 micrometers, so that the pixel density is 706 PPI or 1058 PPI.

[0387] It should be noted that "average width of subpixels" is the ratio of the sum of the widths of all subpixels within a single pixel to the number of subpixels. For example, see [link to previous section]. Figure 2Each pixel P includes a first sub-pixel B, a second sub-pixel G, and a third sub-pixel R whose emitted light wavelengths increase sequentially. The first sub-pixel B, the second sub-pixel G, and the third sub-pixel R emit blue light, green light, and red light, respectively. In this embodiment, the ratio of the number of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R in the display panel is 1:1:1.

[0388] For example, in some designs, it can be revisited. Figure 2 The widths of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R are all 4 micrometers.

[0389] For example, in some designs, such as Figure 14 As shown, the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R are arranged in multiple rows. The width direction of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R is the same as the direction of the rows (e.g., the direction of the X-axis). The first sub-pixel B, the second sub-pixel G, and the third sub-pixel R in each pixel are arranged sequentially along the direction of the rows. The width a1 of the first sub-pixel B, the width a2 of the second sub-pixel G, and the width a3 of the third sub-pixel R decrease sequentially. The width a1 of the first sub-pixel B is greater than 4 micrometers, and the width a3 of the third sub-pixel R is less than 4 micrometers, so that the average width (a1+a2+a3) / 3 of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R is 4 micrometers.

[0390] Under the above design, the width of each pixel (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) (which can be called pitch = a1 + a2 + a3 + 3b) is 36 micrometers, so that the pixel arrangement density is 706 PPI, where b = 2L1 + 2L2 + L3.

[0391] For example, in other designs, such as Figure 15 As shown, the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R are arranged in multiple columns. The width direction of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R is perpendicular to the column direction. The column where the second sub-pixel G and the third sub-pixel R are located is different from the column where the first sub-pixel B is located. In the column where the second sub-pixel G and the third sub-pixel R are located, the columns where the first sub-pixel B is located and the columns where the second sub-pixel G is located are alternately arranged. The number of second sub-pixels G and the third sub-pixels R is equal.

[0392] For example, such as Figure 15As shown, the widths of the second sub-pixel G and the third sub-pixel R are both 4 micrometers; alternatively, the widths of the second sub-pixel G and the third sub-pixel R decrease sequentially, with the width of the first sub-pixel greater than 4 micrometers, and the widths of the second and third sub-pixels equal and less than 4 micrometers. Under this design, the width of each pixel P (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) (which can be referred to as pitch = 2a + 2b) is 24 micrometers, resulting in a pixel density of 1058 PPI, where b = 2L1 + 2L2 + L3.

[0393] In embodiments of this disclosure, PPI can be calculated as the ratio of 25.4 mm to pitch, for example, in... Figure 14 With the pixel arrangement shown, if the pitch is 36 micrometers, the PPI is approximately 706; as shown in the figure, with a pitch of 24 micrometers, the PPI is approximately 1058.

[0394] In some embodiments of this disclosure, pixel density can be increased by simply reducing the width of the subpixels. For example, the average width of the subpixels can be designed to be no less than 2 micrometers, and the gap between the subpixels can be designed to be no less than 17 micrometers. In this way, the pixel density can be from 404 PPI to 668 PPI. Specifically, when 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 density is approximately 446 PPI or 668 PPI.

[0395] For example, the display panel may also include a substrate and a display functional layer located on the substrate, the display functional layer including multiple light-emitting devices corresponding to sub-pixels. The types, positional relationships of the various film layers in the light-emitting devices, and their positional relationships with the isolation structure can be found in the aforementioned section. Figures 1 to 3 The relevant descriptions in the related embodiments will not be repeated here. Furthermore, in this embodiment, please refer again to... Figure 4 The distance h1 between the edges of the first end 310 and the second end 320 in the direction perpendicular to the substrate 100 is not less than 0.6 micrometers. The width of the first end 310 is not less than 2 micrometers, and the width of the second end 320 is not less than 4 micrometers. On the same side of the isolation structure 300, the second spacing L1 of the orthographic projection of the edge of the effective functional area 202 and the edge of the second end 320 onto the substrate 100 is not less than 6.5 micrometers, so that the gap between sub-pixels is not less than 17 micrometers. For example, further, the second tilt angle is 40 degrees to 70 degrees.

[0396] For example, see again Figure 5On a cross-section perpendicular to the substrate 100, and on the same side of the isolation structure 300, the acute angle formed by the straight line P4, defined by the edge of the second electrode 230 and the edge of the second end 320, and the surface where the substrate 100 is located, is a first tilt angle Θ1, which is less than a second tilt angle Θ2. The acute angle formed by the straight line P3, defined by the edge of the effective functional area 202 and the edge of the second end 320, and the surface where the substrate 100 is located (e.g., line P0), is less than or equal to the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be between 20 degrees and 70 degrees.

[0397] For example, see again Figure 5 The acute angle formed by the straight line P3, defined by the edge of the effective functional region 202 and the edge of the second end 320, and the surface of the substrate 100 (e.g., the line P0 included therein), is equal to the first tilt angle Θ1. The acute angle formed by the straight line P6, defined by the edge of the first end 310 facing the surface of the substrate 100 and the edge of the second end 320, and the surface of the substrate 100, is equal to the second tilt angle Θ2. That is, L1 = H / tanΘ2 (the calculation of H in this formula ignores the film thickness of the first electrode and the light-emitting functional layer), and L2 = h1 / tanΘ1. For example, the width of the first end 310 is 2 micrometers, the width of the second end 320 is 4 micrometers, and on the same side of the isolation structure 300, the second spacing L1 of the orthographic projection of the edge of the effective functional region 202 and the edge of the second end 320 onto the substrate 100 is 6.5 micrometers, so that the sub-pixel spacing is 17 micrometers. For example, in each pixel, the average width of the sub-pixel is 2 micrometers, so that the pixel density is 446 PPI or 668 PPI. For example, in such Figure 2 and Figure 14 In the pixel arrangement shown, the widths of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R are all 2 micrometers; alternatively, the width of the first sub-pixel B is greater than 2 micrometers, and the width of the third sub-pixel R is less than 2 micrometers, so that the average width of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R is 2 micrometers. Under this design, the width (which can be called the pitch) of each pixel (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 57 micrometers, resulting in a pixel density of 446 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the foregoing embodiments; they will not be repeated here.

[0398] For example, in such Figure 15In the pixel arrangement shown, the widths of the second sub-pixel G and the third sub-pixel R are both 2 micrometers; alternatively, the widths of the second sub-pixel G and the third sub-pixel R decrease sequentially, the width of the first sub-pixel is greater than 2 micrometers, and the widths of the second and third sub-pixels are equal and less than 2 micrometers. Under this design, the width (which can be called the pitch) of each pixel P (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 38 micrometers, resulting in a pixel density of 668 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the preceding embodiments, which will not be repeated here.

[0399] In some embodiments of this disclosure, pixel density can be increased by reducing the spacing and width of subpixels. For example, the average width of a subpixel can be designed to be no less than 2 micrometers, and the spacing between subpixels can be designed to be no less than 8 micrometers and no more than 17 micrometers, so that the pixel density is between 404 PPI and 1270 PPI. Specifically, when the average width of a subpixel is designed to be 2 micrometers and the spacing between subpixels is designed to be 8 micrometers, the pixel density is approximately 847 PPI or 1270 PPI.

[0400] For example, the display panel may also include a substrate and a display functional layer located on the substrate, the display functional layer including multiple light-emitting devices corresponding to sub-pixels. The types, positional relationships of the various film layers in the light-emitting devices, and their positional relationships with the isolation structure can be found in the aforementioned section. Figures 1 to 3 The relevant descriptions in the related embodiments will not be repeated here. Furthermore, in this embodiment, please refer again to... Figure 4 The distance between the edges of the first end 310 and the second end 320 in the direction perpendicular to the substrate 100 is not less than 0.6 micrometers. The width of the first end 310 is not less than 2 micrometers, and the width of the second end 320 is not less than 4 micrometers. On the same side of the isolation structure 300, the distance between the orthographic projections of the edge of the effective functional area 202 and the edge of the second end 320 onto the substrate 100 is not less than 2 micrometers, so that the gap between sub-pixels is not less than 8 micrometers. For example, further, the second tilt angle is 40 degrees to 70 degrees.

[0401] For example, see again Figure 5 On a cross-section perpendicular to the substrate 100, and on the same side of the isolation structure 300, the acute angle formed by the straight line P4, defined by the edge of the second electrode 230 and the edge of the second end 320, and the surface where the substrate 100 is located, is a first tilt angle Θ1, which is less than a second tilt angle Θ2. The acute angle formed by the straight line P3, defined by the edge of the effective functional area 202 and the edge of the second end 320, and the surface where the substrate 100 is located (e.g., line P0), is less than or equal to the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be between 20 degrees and 70 degrees.

[0402] For example, see again Figure 5 The acute angle formed by the straight line P3, defined by the edge of the effective functional region 202 and the edge of the second end 320, and the surface of the substrate 100 (e.g., the line P0 included therein), is equal to the first tilt angle Θ1. The acute angle formed by the straight line P6, defined by the edge of the first end 310 facing the surface of the substrate 100 and the edge of the second end 320, and the surface of the substrate 100, is equal to the second tilt angle Θ2. That is, L1 = H / tanΘ2 (the calculation of H in this formula ignores the film thickness of the first electrode and the light-emitting functional layer), and L2 = h1 / tanΘ1. For example, the width of the first end 310 is 2 micrometers, the width of the second end 320 is 4 micrometers, and on the same side of the isolation structure 300, the distance between the orthographic projections of the edge of the effective functional region 202 and the edge of the second end 320 onto the substrate 100 is 2 micrometers, so that the sub-pixel spacing is 8 micrometers. For example, further, in each pixel, the average width of the sub-pixel is 2 micrometers, so that the pixel density is 847 PPI or 1270 PPI.

[0403] For example, in such Figure 2 and Figure 14 In the pixel arrangement structure shown, the widths of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R are all 2 micrometers; alternatively, the width of the first sub-pixel B is greater than 2 micrometers, and the width of the third sub-pixel R is less than 2 micrometers, so that the average width of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R is 2 micrometers. Under the above design, the width (which can be called the pitch) of each pixel (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 30 micrometers, resulting in a pixel density of 847 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the foregoing embodiments, which will not be repeated here.

[0404] For example, in such Figure 15 In the pixel arrangement structure shown, the widths of the second sub-pixel G and the third sub-pixel R are both 2 micrometers; alternatively, the widths of the second sub-pixel G and the third sub-pixel R decrease sequentially, the width of the first sub-pixel is greater than 2 micrometers, and the widths of the second and third sub-pixels are equal and less than 2 micrometers. Under this design, the width (which can be called the pitch) of each pixel P (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 20 micrometers, resulting in a pixel density of 1270 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the foregoing embodiments, which will not be repeated here.

[0405] In some embodiments of this disclosure, pixel density can be increased by reducing the spacing and width of subpixels. For example, the average width of a subpixel can be designed to be no less than 1.5 micrometers, and the spacing between subpixels can be designed to be no less than 7 micrometers and no more than 17 micrometers, so that the pixel density is between 404 PPI and 1500 PPI. Specifically, when the average width of a subpixel is designed to be 1.5 micrometers and the spacing between subpixels is designed to be 7 micrometers, the pixel density is approximately 1000 PPI or 1500 PPI.

[0406] For example, the display panel may also include a substrate and a display functional layer located on the substrate, the display functional layer including multiple light-emitting devices corresponding to sub-pixels. The types, positional relationships of the various film layers in the light-emitting devices, and their positional relationships with the isolation structure can be found in the aforementioned section. Figures 1 to 3 The relevant descriptions in the related embodiments will not be repeated here. Furthermore, in this embodiment, please refer again to... Figure 4 The distance between the edges of the first end 310 and the second end 320 in a direction perpendicular to the substrate 100 is not less than 0.6 micrometers. The width of the first end 310 is not less than 2 micrometers, and the width of the second end 320 is not less than 4 micrometers. On the same side of the isolation structure 300, the second spacing L1 of the orthographic projection of the edge of the effective functional area 202 and the edge of the second end 320 onto the substrate 100 is not less than 1.5 micrometers, so that the gap between sub-pixels is not less than 7 micrometers. For example, further, the second tilt angle is 40 degrees to 70 degrees.

[0407] For example, see again Figure 5 On a cross-section perpendicular to the substrate 100, and on the same side of the isolation structure 300, the acute angle formed by the straight line P4, defined by the edge of the second electrode 230 and the edge of the second end 320, and the surface where the substrate 100 is located, is a first tilt angle Θ1, which is less than a second tilt angle Θ2. The acute angle formed by the straight line P3, defined by the edge of the effective functional area 202 and the edge of the second end 320, and the surface where the substrate 100 is located (e.g., line P0), is less than or equal to the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be between 20 degrees and 70 degrees.

[0408] For example, see again Figure 5The acute angle formed by the straight line P3, defined by the edge of the effective functional region 202 and the edge of the second end 320, and the surface of the substrate 100 (e.g., the line P0 included therein), is equal to the first tilt angle Θ1. The acute angle formed by the straight line P6, defined by the edge of the first end 310 facing the surface of the substrate 100 and the edge of the second end 320, and the surface of the substrate 100, is equal to the second tilt angle Θ2. That is, L1 = H / tanΘ2 (the calculation of H in this formula ignores the film thickness of the first electrode and the light-emitting functional layer), and L2 = h1 / tanΘ1. For example, the width of the first end 310 is 2 micrometers, the width of the second end 320 is 4 micrometers, and on the same side of the isolation structure 300, the second spacing L1 of the orthographic projection of the edge of the effective functional region 202 and the edge of the second end 320 onto the substrate 100 is 1.5 micrometers, so that the gap between sub-pixels is 7 micrometers. For example, further, the average width of the subpixels in each pixel is 1.5 micrometers, so that the pixel density is 1000 PPI or 1500 PPI.

[0409] For example, in such Figure 2 and Figure 14 In the pixel arrangement structure shown, the widths of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R are all 1.5 micrometers; alternatively, the width of the first sub-pixel B is greater than 1.5 micrometers, and the width of the third sub-pixel R is less than 1.5 micrometers, so that the average width of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R is 1.5 micrometers. Under the above design, the width (which can be called the pitch) of each pixel (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 25.5 micrometers, so that the pixel arrangement density is 1000 PPI. For the design of the average width of the sub-pixels, please refer to the relevant descriptions in the foregoing embodiments, which will not be repeated here.

[0410] For example, in such Figure 15 In the pixel arrangement shown, the widths of the second sub-pixel G and the third sub-pixel R are both 1.5 micrometers; alternatively, the widths of the second sub-pixel G and the third sub-pixel R decrease sequentially, with the width of the first sub-pixel greater than 1.5 micrometers, and the widths of the second and third sub-pixels equal and less than 1.5 micrometers. Under this design, the width (which can be called the pitch) of each pixel P (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 17 micrometers, resulting in a pixel density of 1500 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the preceding embodiments, which will not be repeated here.

[0411] For example, in such Figure 2 and Figure 14In the pixel arrangement shown, the widths of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R are all 2 micrometers; alternatively, the width of the first sub-pixel B is greater than 2 micrometers, and the width of the third sub-pixel R is less than 2 micrometers, so that the average width of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R is 2 micrometers. Under the above design, the width (which can be called the pitch) of each pixel (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 27 micrometers, resulting in a pixel density of 941 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the foregoing embodiments, which will not be repeated here.

[0412] For example, in such Figure 15 In the pixel arrangement shown, the widths of the second sub-pixel G and the third sub-pixel R are both 2 micrometers; alternatively, the widths of the second sub-pixel G and the third sub-pixel R decrease sequentially, with the width of the first sub-pixel greater than 2 micrometers, and the widths of the second and third sub-pixels equal and less than 2 micrometers. Under this design, the width (which can be called the pitch) of each pixel P (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 18 micrometers, resulting in a pixel density of 1411 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the preceding embodiments, which will not be repeated here.

[0413] In some embodiments of this disclosure, pixel density can be increased by reducing the spacing and width of subpixels. For example, the average width of a subpixel can be designed to be no less than 1.35 micrometers, and the spacing between subpixels can be designed to be no less than 5 micrometers and no more than 17 micrometers, so that the pixel density is between 404 PPI and 2000 PPI. Specifically, when the average width of a subpixel is designed to be 1.35 micrometers and the spacing between subpixels is designed to be 5 micrometers, the pixel density is approximately 1333 PPI or 2000 PPI.

[0414] For example, the display panel may also include a substrate and a display functional layer located on the substrate, the display functional layer including multiple light-emitting devices corresponding to sub-pixels. The types, positional relationships of the various film layers in the light-emitting devices, and their positional relationships with the isolation structure can be found in the aforementioned section. Figures 1 to 3 The relevant descriptions in the related embodiments will not be repeated here. Furthermore, in this embodiment, please refer again to... Figure 4The distance between the edges of the first end 310 and the second end 320 in a direction perpendicular to the substrate 100 is not less than 0.6 micrometers. The width of the second end 320 is not less than 3.5 micrometers, and the width of the first end 310 is not less than 2 micrometers. On the same side of the isolation structure 300, the second spacing L1 of the orthographic projection of the edge of the effective functional area 202 and the edge of the second end 320 onto the substrate 100 is not less than 0.75 micrometers, so that the gap between sub-pixels is not less than 5 micrometers. For example, further, the second tilt angle is 40 degrees to 70 degrees.

[0415] For example, see again Figure 5 On a cross-section perpendicular to the substrate 100, and on the same side of the isolation structure 300, the acute angle formed by the straight line P4, defined by the edge of the second electrode 230 and the edge of the second end 320, and the surface where the substrate 100 is located, is a first tilt angle Θ1, which is less than a second tilt angle Θ2. The acute angle formed by the straight line P3, defined by the edge of the effective functional area 202 and the edge of the second end 320, and the surface where the substrate 100 is located (e.g., line P0), is less than or equal to the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be between 20 degrees and 70 degrees.

[0416] For example, see again Figure 5 The acute angle formed by the straight line P3, defined by the edge of the effective functional region 202 and the edge of the second end 320, and the surface of the substrate 100 (e.g., the line P0 included therein), is equal to the first tilt angle Θ1. The acute angle formed by the straight line P6, defined by the edge of the first end 310 facing the surface of the substrate 100 and the edge of the second end 320, and the surface of the substrate 100, is equal to the second tilt angle Θ2. That is, L1 = H / tanΘ2 (the calculation of H in this formula ignores the film thickness of the first electrode and the light-emitting functional layer), and L2 = h1 / tanΘ1. For example, the width of the second end 320 is 3.5 micrometers, the width of the first end 310 is 2 micrometers, and on the same side of the isolation structure 300, the second spacing L1 of the orthographic projection of the edge of the effective functional region 202 and the edge of the second end 320 onto the substrate 100 is 0.75 micrometers, so that the gap between subpixels is 5 micrometers. For example, further, in each pixel, the average width of the subpixel is 1.35 micrometers, so that the pixel density is 1333 PPI or 2000 PPI.

[0417] For example, in such Figure 2 and Figure 14In the pixel arrangement structure shown, the widths of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R are all 1.35 micrometers; alternatively, the width of the first sub-pixel B is greater than 1.35 micrometers, and the width of the third sub-pixel R is less than 1.35 micrometers, so that the average width of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R is 1.35 micrometers. Under the above design, the width (which can be referred to as the pitch) of each pixel (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 19.05 micrometers, resulting in a pixel density of 1333 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the foregoing embodiments, which will not be repeated here.

[0418] For example, in such Figure 15 In the pixel arrangement shown, the widths of the second sub-pixel G and the third sub-pixel R are both 1.35 micrometers; alternatively, the widths of the second sub-pixel G and the third sub-pixel R decrease sequentially, with the width of the first sub-pixel greater than 1.35 micrometers, and the widths of the second and third sub-pixels equal and less than 1.35 micrometers. Under this design, the width (which can be called the pitch) of each pixel P (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 12.7 micrometers, resulting in a pixel density of 2000 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the preceding embodiments, which will not be repeated here.

[0419] In some embodiments of this disclosure, pixel density can be increased by reducing the spacing between subpixels and minimizing the width of the subpixels. For example, the average width of the subpixels can be designed to be no less than 4.8 micrometers, and the spacing between the subpixels can be designed to be no less than 12 micrometers and no more than 17 micrometers, so that the pixel density is between 404 PPI and 756 PPI. Specifically, when the average width of the subpixels is designed to be 4.8 micrometers and the spacing between the subpixels is designed to be 7 micrometers, the pixel density is approximately 504 PPI or 756 PPI.

[0420] For example, the display panel may also include a substrate and a display functional layer located on the substrate, the display functional layer including multiple light-emitting devices corresponding to sub-pixels. The types, positional relationships of the various film layers in the light-emitting devices, and their positional relationships with the isolation structure can be found in the aforementioned section. Figures 1 to 3 The relevant descriptions in the related embodiments will not be repeated here. Furthermore, in this embodiment, please refer again to... Figure 4The distance between the edges of the first end 310 and the second end 320 in the direction perpendicular to the substrate 100 is not less than 0.6 micrometers. The width of the first end 310 is not less than 2 micrometers, and the width of the second end 320 is not less than 4 micrometers. On the same side of the isolation structure 300, the second spacing L1 of the orthographic projection of the edge of the effective functional area 202 and the edge of the second end 320 onto the substrate 100 is not less than 4 micrometers, so that the gap between sub-pixels is not less than 12 micrometers. For example, further, the second tilt angle is 40 degrees to 70 degrees.

[0421] For example, see again Figure 5 On a cross-section perpendicular to the substrate 100, and on the same side of the isolation structure 300, the acute angle formed by the straight line P4, defined by the edge of the second electrode 230 and the edge of the second end 320, and the surface where the substrate 100 is located, is a first tilt angle Θ1, which is less than a second tilt angle Θ2. The acute angle formed by the straight line P3, defined by the edge of the effective functional area 202 and the edge of the second end 320, and the surface where the substrate 100 is located (e.g., line P0), is less than or equal to the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be between 20 degrees and 70 degrees.

[0422] For example, see again Figure 5 The acute angle formed by the straight line P3, defined by the edge of the effective functional region 202 and the edge of the second end 320, and the surface of the substrate 100 (e.g., the line P0 included therein), is equal to the first tilt angle Θ1. The acute angle formed by the straight line P6, defined by the edge of the first end 310 facing the surface of the substrate 100 and the edge of the second end 320, and the surface of the substrate 100, is equal to the second tilt angle Θ2. That is, L1 = H / tanΘ2 (the calculation of H in this formula ignores the film thickness of the first electrode and the light-emitting functional layer), and L2 = h1 / tanΘ1. For example, the width of the first end 310 is 2 micrometers, the width of the second end 320 is 4 micrometers, and on the same side of the isolation structure 300, the second spacing L1 of the orthographic projection of the edge of the effective functional region 202 and the edge of the second end 320 onto the substrate 100 is 4 micrometers, so that the gap between the sub-pixels is 12 micrometers. For example, further, in each pixel, the average width of the subpixel is 4.8 micrometers, so that the pixel density is 504 PPI or 756 PPI.

[0423] For example, in such Figure 2 and Figure 14In the pixel arrangement structure shown, the widths of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R are all 4.8 micrometers; alternatively, the width of the first sub-pixel B is greater than 4.8 micrometers, and the width of the third sub-pixel R is less than 4.8 micrometers, so that the average width of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R is 4.8 micrometers. Under the above design, the width (which can be referred to as the pitch) of each pixel (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 50.4 micrometers, so that the pixel density is 504 PPI. For the design of the average width of the sub-pixels, please refer to the relevant descriptions in the foregoing embodiments, which will not be repeated here.

[0424] For example, in such Figure 15 In the pixel arrangement shown, the widths of the second sub-pixel G and the third sub-pixel R are both 4.8 micrometers; alternatively, the widths of the second sub-pixel G and the third sub-pixel R decrease sequentially, with the width of the first sub-pixel greater than 4.8 micrometers, and the widths of the second and third sub-pixels equal and less than 4.8 micrometers. Under this design, the width (which can be called the pitch) of each pixel P (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 33.6 micrometers, resulting in a pixel density of 756 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the preceding embodiments, which will not be repeated here.

[0425] In some embodiments of this disclosure, pixel density can be increased by reducing the spacing and width of subpixels. For example, the average width of a subpixel can be designed to be no less than 2.8 micrometers, and the spacing between subpixels can be designed to be no less than 10 micrometers and no more than 17 micrometers, so that the pixel density is between 404 PPI and 756 PPI. Specifically, when the average width of a subpixel is designed to be 2.8 micrometers and the spacing between subpixels is designed to be 7 micrometers, the pixel density is approximately 661 PPI or 992 PPI.

[0426] For example, the display panel may also include a substrate and a display functional layer located on the substrate, the display functional layer including multiple light-emitting devices corresponding to sub-pixels. The types, positional relationships of the various film layers in the light-emitting devices, and their positional relationships with the isolation structure can be found in the aforementioned section. Figures 1 to 3 The relevant descriptions in the related embodiments will not be repeated here. Furthermore, in this embodiment, please refer again to... Figure 4The distance between the edges of the first end 310 and the second end 320 in the direction perpendicular to the substrate 100 is not less than 0.6 micrometers. The width of the first end 310 is not less than 2 micrometers, and the width of the second end 320 is not less than 4 micrometers. On the same side of the isolation structure 300, the second spacing L1 of the orthographic projection of the edge of the effective functional area 202 and the edge of the second end 320 onto the substrate 100 is not less than 3 micrometers, so that the gap between sub-pixels is not less than 10 micrometers. For example, further, the second tilt angle is 40 degrees to 70 degrees.

[0427] For example, see again Figure 5 On a cross-section perpendicular to the substrate 100, and on the same side of the isolation structure 300, the acute angle formed by the straight line P4, defined by the edge of the second electrode 230 and the edge of the second end 320, and the surface where the substrate 100 is located, is a first tilt angle Θ1, which is less than a second tilt angle Θ2. The acute angle formed by the straight line P3, defined by the edge of the effective functional area 202 and the edge of the second end 320, and the surface where the substrate 100 is located (e.g., line P0), is less than or equal to the first tilt angle Θ1. In this case, the first tilt angle Θ1 can be designed to be between 20 degrees and 70 degrees.

[0428] For example, see again Figure 5 The acute angle formed by the straight line P3, defined by the edge of the effective functional region 202 and the edge of the second end 320, and the surface of the substrate 100 (e.g., the line P0 included therein), is equal to the first tilt angle Θ1. The acute angle formed by the straight line P6, defined by the edge of the first end 310 facing the surface of the substrate 100 and the edge of the second end 320, and the surface of the substrate 100, is equal to the second tilt angle Θ2. That is, L1 = H / tanΘ2 (the calculation of H in this formula ignores the film thickness of the first electrode and the light-emitting functional layer), and L2 = h1 / tanΘ1. For example, the width of the first end 310 is 2 micrometers, the width of the second end 320 is 4 micrometers, and on the same side of the isolation structure 300, the second spacing L1 of the orthographic projection of the edge of the effective functional region 202 and the edge of the second end 320 onto the substrate 100 is 3 micrometers, so that the gap between the sub-pixels is 10 micrometers. For example, further, the average width of the subpixels in each pixel is 2.8 micrometers, so that the pixel density is 661 PPI or 992 PPI.

[0429] For example, in such Figure 2 and Figure 14In the pixel arrangement structure shown, the widths of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R are all 2.8 micrometers; alternatively, the width of the first sub-pixel B is greater than 2.8 micrometers, and the width of the third sub-pixel R is less than 2.8 micrometers, so that the average width of the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R is 2.8 micrometers. Under the above design, the width (which can be referred to as the pitch) of each pixel (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 38.4 micrometers, resulting in a pixel density of 661 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the foregoing embodiments, which will not be repeated here.

[0430] For example, in such Figure 15 In the pixel arrangement shown, the widths of the second sub-pixel G and the third sub-pixel R are both 2.8 micrometers; alternatively, the widths of the second sub-pixel G and the third sub-pixel R decrease sequentially, with the width of the first sub-pixel greater than 2.8 micrometers, and the widths of the second and third sub-pixels equal and less than 2.8 micrometers. Under this design, the width (which can be called the pitch) of each pixel P (including the first sub-pixel B, the second sub-pixel G, and the third sub-pixel R) is 25.6 micrometers, resulting in a pixel density of 992 PPI. For details on the design of the average width of the sub-pixels, please refer to the relevant descriptions in the preceding embodiments, which will not be repeated here.

[0431] It should be noted that in the embodiments of this disclosure, the increase in pixel density is based on the existing manufacturing process conditions. That is, if the current manufacturing process conditions, such as photolithography accuracy and alignment accuracy (e.g., the alignment accuracy of photolithography), remain unchanged, further increasing the PPI is possible. As technology develops, the above-mentioned process conditions may be further improved. In this case, the pixel density mentioned in the embodiments of this disclosure can also be further improved. For example, the gap of the first electrode and the width of the support portion can be further reduced, and the width of the sub-pixel (or effective functional area) can be further reduced.

[0432] For example, in embodiments of this disclosure, the display panel may include an encapsulation layer covering the display functional layer. This encapsulation layer can isolate the light-emitting devices in the display functional layer and has a planarization function, so as to facilitate the setting of functional structures such as a touch functional layer, polarizer, lens layer, and cover plate on the encapsulation layer. For example, the encapsulation layer may include a first encapsulation layer (mentioned in the foregoing embodiments), a second encapsulation layer, and a third encapsulation layer stacked sequentially on the display functional layer. The first and third encapsulation layers are both inorganic film layers. Inorganic film layers have high density to isolate water, oxygen, etc. The second encapsulation layer is an organic encapsulation layer, thus having a larger thickness and a planarization function.

[0433] The above provides a general overview of some basic designs with isolation structures and the principles by which they can increase the pixel density (PPI) of a display panel. However, in practical applications, the isolation structure may have different design shapes, and the display panel may contain other designs, such as the first encapsulation layer mentioned above, as well as the optical functional units and protective layers described below. Therefore, considering different specific designs of the display panel, while ensuring the functionality of the specific structures involved, we can explore the minimum dimension of the width between the subpixels of the display panel (related to the width of the isolation structure between the two first openings) to obtain a design method for achieving the maximum possible pixel density of the display panel under different designs, as detailed below.

[0434] At least one embodiment of this disclosure provides a display panel, such as Figure 16 and Figure 17 As shown, the display panel includes a substrate 100 and an isolation structure 300, a display functional 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. The orthographic projection of the first end 310 onto the substrate 100 lies within the orthographic projection of the second end 320 onto the substrate 100. The isolation structure defines a plurality of first openings 301. The display functional layer is located on the substrate 100 and includes a plurality of light-emitting devices 200 located within corresponding first openings 301. Each light-emitting device 200 includes a first electrode 210, a light-emitting functional layer 220, and a second electrode 230 stacked on the substrate 100. The first openings 301 limit the corresponding light-emitting devices 200. The first encapsulation layer 510 is located on the side of the display functional layer away from the substrate 100. A portion of the edge of at least a portion of the film layer of the light-emitting device 200 has its orthographic projection on the substrate 100 located within the orthographic projection of the second end 320 on the substrate 100. The relationships between the various structures involved in the display panel and their functions can be found in the relevant descriptions in the foregoing embodiments, and will not be repeated here.

[0435] It should be noted that at least a portion of the film layer of the light-emitting device 200 may include the light-emitting functional layer mentioned in the foregoing embodiments, or it may include the light-emitting functional layer and the second electrode mentioned in the foregoing embodiments. The edge portion of the at least a portion of the film layer may refer to the part of the film layer with uneven thickness distribution. For example, during the entire vapor deposition process of the film layer, the vapor deposition material sprayed from the vapor deposition equipment will be blocked to varying degrees by the isolation structure when forming the edge portions of different film layers; the size of the edge portions of different film layers will vary depending on the vapor deposition angle and the position of the film layer.

[0436] For example, such as Figure 16 and Figure 17As shown, along the direction from the middle of the light-emitting device 200 to the corresponding edge, the thickness of at least a portion of the film layer of the light-emitting device 200 gradually decreases at the edge. Thus, some film layers in the light-emitting device, such as the light-emitting functional layer 220 and the second electrode 230, are formed by assisted vapor deposition through the isolation structure 300. The isolation structure limits the deposition range of the vapor deposition material. Therefore, at the edges of these film layers, the thickness decreases as the distance from the isolation structure increases. Correspondingly, the thickness of the light-emitting device 200 at the edge of the second end 320 is less than the thickness of its middle portion. Based on this, the height of the isolation structure 300 (e.g., the first height described below) can be designed to ensure the encapsulation effect of the first encapsulation layer 510 while having a relatively small height, further reducing the width of the isolation structure 300 between adjacent first openings 301, thereby improving the aperture ratio and pixel density of the display panel.

[0437] Please refer to Figure 14 and Figure 15 As shown, the display panel includes multiple sub-pixels, each sub-pixel having two opposing long sides Lc and two opposing short sides Sh. Some sub-pixels may have an edge portion with gradually decreasing thickness along the direction from the center of the light-emitting device to the corresponding edge only at the short side Sh, while the long side Lc may not have such an edge portion. This can further improve the aperture ratio of the display panel. Alternatively, as needed, some sub-pixels may have an edge portion with gradually decreasing thickness along the direction from the center of the light-emitting device to the corresponding edge only at the long side Lc, while the short side Sh may not have such an edge portion.

[0438] In at least one embodiment of this disclosure, such as Figure 16 and Figure 17 As shown, along the direction perpendicular to the surface of the substrate 100, the distance from the edge of the second end 320 to the edge of the first end 310 is the first height h1, and at the middle position of the light-emitting device 200, the spacing between the first encapsulation layer 510 and the first electrode 210 is the second height h2. The product of the second height h2 and the first thickness coefficient k is the first value, and the difference between the first height h1 and the first value is not less than the encapsulation safety margin. Based on the above calculation relationship, when designing the display panel, the distance between the first electrode 210 of the light-emitting device and the first encapsulation layer 510 can be determined according to the film layer structure to be set between them, and a smaller value of the first height h1 can be obtained. This helps to find the smaller width that the isolation structure 300 can be designed between adjacent first openings 301 under this condition, so as to improve the aperture ratio and PPI of the display panel.

[0439] In at least one embodiment of this disclosure, within the cross-section of the light-emitting device, the position of the surface of the first encapsulation layer 510 facing the substrate 100, located on a straight line passing through the edge of the second end 320 and perpendicular to the surface of the substrate 100, is a separation-related height h3 (which may be referred to as the third height) at a distance from the edge of the first end 310 in a direction perpendicular to the surface of the substrate 100. The distance between the edge of the second end 320 and the edge of the first end 310 in a direction perpendicular to the surface of the substrate 100 is a first height h1. The difference between the first height h1 and the separation-related height (third height) h3 is not less than the encapsulation safety margin.

[0440] Optionally, M is the ratio of the partition's associated height to the second height. Optionally, the first thickness coefficient is greater than or equal to M and less than 1, where M equals 0.5 ± 0.2. Optionally, the first thickness coefficient is equal to M. Optionally, the first thickness coefficient is greater than or equal to 0.5 and less than 1.

[0441] It should be noted that the theoretical value of M is 0.5. However, during the process of depositing the relevant film layer with the help of the isolation structure, factors such as static electricity, the adsorption properties of the materials used, and the strength of the relevant materials may affect the isolation connection height h3, which may deviate from the theoretical value. Accordingly, depending on the actual situation, the value of M may vary within the range of 0.5 ± 0.2. The specific value can be obtained through experiments or by referring to experience.

[0442] Optionally, the first thickness coefficient is equal to 0.5. This helps to minimize the first height h1, which in turn helps to increase the pixel density of the display panel.

[0443] It should be noted that the encapsulation safety margin is the distance between the lower surface of the first encapsulation layer and the edge of the second end, on a straight line corresponding to the edge passing through the second end and perpendicular to the surface of the substrate, required to form a first encapsulation layer that meets functional requirements. In other words, the first encapsulation layer formed on the surface of the isolation structure using the space corresponding to the encapsulation safety margin can fulfill the required functional function, such as meeting requirements in subsequent processes and product use. The encapsulation safety margin may vary depending on the relevant structure, materials, etc., and can be obtained through experimentation or experience based on specific circumstances. When determining the encapsulation safety margin, if the distance X between the edge of the second end and the lower surface of the first encapsulation layer on a straight line corresponding to the edge passing through the second end and perpendicular to the surface of the substrate meets the functional requirements, and no smaller value is found to meet the requirements, then X should be considered the encapsulation safety margin. Among the multiple values ​​that meet the functional requirements, the smallest value can be used as the encapsulation safety margin.

[0444] For example, when the emitted light colors of the light-emitting devices are different, the light-emitting device with the largest thickness can be selected as a reference to design parameters such as the first height h1. For example, the light-emitting device with the largest thickness can be a light-emitting device that emits red light.

[0445] It should be noted that the first encapsulation layer 510 can be formed by chemical vapor deposition, atomic layer deposition, etc. If the first height h1 is too small, resulting in the film thickness of the first encapsulation layer 510 formed at the sidewall of the isolation structure being too small, it will result in the inability to effectively protect the corresponding light-emitting devices and other structures.

[0446] It should be noted that, as Figure 16 As shown, if the first encapsulation layer 510 is formed directly on the light-emitting device 200 after its fabrication is completed, then the sum of the designed thicknesses k1 of the vapor-deposited film 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 designed thicknesses of the light-emitting functional layer 220 and the second electrode 230 can be the thicknesses expected during the design phase of the vapor deposition. For example, at the middle position of the light-emitting device 200, the isolation structure 300 will not block the vapor deposition at that position throughout the entire vapor deposition process, so the thickness of the vapor-deposited film layer at that position is the largest, and the film layer thickness at that position is the designed thickness of the film layer.

[0447] In at least one embodiment of this disclosure, such as Figure 17 As shown, at the middle position of the light-emitting device 200, the first encapsulation layer 510 has a second thickness k2, which is the thickness of the first encapsulation layer 510 covering the middle portion of the light-emitting device. The first encapsulation layer 510 covers the light-emitting device 200 and part of the side surface of the second end 320, and the encapsulation safety margin is equal to the product of the second thickness k2 and the second thickness coefficient n.

[0448] In one example, such as Figure 17 As shown, at the side wall of the isolation structure 300, the specific structure of the isolation structure, the selection of the second thickness coefficient n, and the second thickness k2 may cause the first encapsulation layer 510 to enclose a closed cavity (at position S2).

[0449] For example, in another example, such as Figure 18 As shown, at the side wall of the isolation structure 300, the specific structure of the isolation structure, the selection of the second thickness coefficient n, and the second thickness k2 can make the opening of the cavity of the first encapsulation layer 510 just close.

[0450] For example, in another example, such as Figure 19As shown, at the sidewall of the isolation structure 300, the specific structure of the isolation structure, the selection of the second thickness coefficient n, and the second thickness k2 allow the first encapsulation layer 510 to enclose a cavity with an opening. While ensuring the encapsulation effect, a small encapsulation safety margin allows the isolation structure 300 to have a smaller height, thereby reducing the width between adjacent first openings (see...). Figure 5 The L in the image is smaller to increase the pixel density of the display panel.

[0451] For example, the second thickness factor n can take values ​​between 0.2 and 2; generally, when the second thickness factor n can take values ​​less than 2, it corresponds to the isolation structure of some structures (such as...). Figure 16 The isolation structure shown in the figure has a closed chamber formed on the side of the isolation structure 300.

[0452] For example, the second thickness factor n is 0.25-1.2. Further, for example, the second thickness factor n is 0.3-0.8. For some structural forms (such as...) Figure 16 The isolation structure shown in the diagram has a larger second thickness coefficient n, which is more conducive to ensuring the encapsulation effect, but will not increase the size between pixels; based on this, choosing a value in the range of 0.3-0.8 for the second thickness coefficient n may achieve a better overall effect.

[0453] In at least one embodiment of this disclosure, such as Figure 20 As shown, the distance between the orthographic projection of the edge of the second end 320 onto the surface of the substrate 100 and the orthographic projection of the edge of the first end 310 onto the surface of the substrate 100 is the first width L2. Within the cross-section of the light-emitting device 200, the acute angle formed by the intersection of the straight line passing through the edge of the second electrode 230 and the edge of the second end 320 with the surface of the substrate 100 is the first tilt angle Θ1. The first width L2 is less than the product of the first height h1 and the cotangent of the first tilt angle Θ1, i.e., L2 < h1 * cotΘ1. The aforementioned first tilt angle Θ1 can correspond to the evaporation angle of the second electrode 230 during evaporation. By controlling the numerical relationship between the first width L2, the first height h1, and the evaporation angle Θ1, it can be ensured that the edge of the second electrode 230 can overlap the isolation structure 300 (e.g., its first end 310), thereby ensuring that the second electrode 230 of the light-emitting device 200 is connected to the external circuit (e.g., a common electrode line or other pixel driving circuit) through the isolation structure 300.

[0454] It should be noted that if the above less than relationship is replaced by an equal relationship, i.e., L2 = h1 * cotΘ1, then the second electrode 230 will just be in contact with the side wall of the partition. Under the above less than relationship, the second electrode 230 can have a certain climbing height on the side surface of the partition (e.g., the upturned tail section described below).

[0455] It should be noted that, in the embodiments of this disclosure, the edge of the first end is the outermost edge of the exposed portion of the first end that is closest to the substrate during the fabrication of the light-emitting functional layer; or, the edge of the first end is the outermost edge of the exposed portion of the first end that is closest to the substrate after all light-emitting functional layers have been removed. The edge of the second end is the outermost edge of the second end.

[0456] The "positive cross section of the light-emitting device" can be a cross section that is perpendicular to the plane of the substrate and parallel to the direction from one first opening to another adjacent first opening, or it can be the normal plane of the edge line of the second end that is perpendicular to the plane of the substrate.

[0457] For example, such as Figure 21A As shown, the second electrode 230 has a raised tail portion that overlaps the side surface of the first end 310. That is, within the cross-section of the light-emitting device 200, the acute angle formed by the intersection of the straight line passing through the edge of the second electrode 230 and the edge of the second end 320 with the surface where the substrate 100 is located is smaller than the acute angle formed by the intersection of the straight line passing through the edge of the first end 310 and the edge of the second end 320 with the surface where the substrate 100 is located. Thus, during the process of vapor-depositing conductive material to form the second electrode 230, conductive material can be vapor-deposited on the sidewall of the first end 310 to form the raised tail portion.

[0458] For example, in Figure 21A In the structure shown, the size of the raised tail can be designed based on dimension L7, which is: the product of the cotangent of the acute angle Θ1 where the straight line defined by the edge of the second electrode 230 and the edge of the second end 320 intersects the surface of the substrate 100 on the front cross section of the light-emitting device, and the first height h1, and the difference L7 between the product of the product of the product of the product of the first end 310 and the edge of the second end 320 in the direction parallel to the surface of the substrate 100 and the first width L2. Dimension L7 is not less than a safety dimension, which can be a preset value to ensure that the second electrode 230 and the isolation structure 300 have sufficient contact area to prevent excessive contact resistance between them. For example, this safety dimension is related to factors such as the material of the second electrode 230 and the magnitude of the current to be carried, and can be specifically measured experimentally or obtained through experience.

[0459] For example, such as Figure 21A As shown, within the cross-section of the light-emitting device 200, the acute angle formed by the intersection of the straight line passing through the edge of the light-emitting functional layer 220 and the edge of the second end 320 with the surface where the substrate 100 is located is the tilt angle of the light-emitting functional layer. The tilt angle of the light-emitting functional layer is greater than the first tilt angle Θ1. In this way, the second electrode 230 can completely cover the light-emitting functional layer 220, so that the edge of the second electrode 230 can be connected to the isolation structure 300.

[0460] For example, the first width L2 is greater than the product of the first height h1 and the cotangent of the tilt angle of the light-emitting functional layer. In this way, the edge of the light-emitting functional layer 220 will not extend to the side wall of the isolation structure 300, thereby avoiding leakage from the lower side of the light-emitting functional layer 220 to the isolation structure 300 and improving the luminous efficiency.

[0461] For example, see Figures 16 to 21A The light-emitting functional layer 220 includes a first functional layer 221. Within the cross-section of the light-emitting device 200, the acute angle formed by the intersection of the straight line passing through the edge of the first functional layer 221 and the edge of the second end 320 with the plane containing the substrate 100 is a second tilt angle Θ2, which is greater than the tilt angle of the light-emitting functional layer. In the light-emitting device 200, the first functional layer 221 is covered by other film layers in the light-emitting functional layer 220 (such as the light-emitting layer and the second functional layer described below). Thus, the first functional layer 221 is not directly connected to the second electrode 230. Furthermore, compared to the entire edge of the light-emitting functional layer 220, the distance between the edge of the first functional layer 221 and the isolation structure 300 is larger, thereby preventing the first functional layer 221 from being connected together through the isolation structure 300, thus avoiding leakage between the first functional layer 221 and the isolation structure 300 and improving the luminous efficiency.

[0462] For example, see Figures 16 to 21A The light-emitting functional layer 220 also includes a light-emitting layer 222 and a second functional layer 223, which cover the edge of the first functional layer 221. This design prevents the first functional layer 221 from directly connecting to the second electrode 230 by passing over the light-emitting layer 222 and the second functional layer 223, thus ensuring the light-emitting effect of the light-emitting device 200.

[0463] In at least one embodiment of this disclosure, see Figures 16 to 21A The second electrode 230 is formed using the isolation structure 300. Therefore, the thickness of the second electrode 230 is smaller the closer it is to the isolation structure 300 at the edge portion of the second electrode 230.

[0464] Within the cross-section of the light-emitting device 200, the thickness of the second electrode 230 at the position passing through the edge of the first electrode 210 and perpendicular to the surface of the substrate 100 is less than the thickness of the portion of the second electrode 230 corresponding to the middle position of the light-emitting device 200. This allows for better overlap between the second electrode 230 and the isolation structure 300 using a smaller first tilt angle Θ1.

[0465] In at least one embodiment of this disclosure, such as Figure 20 and Figure 21AAs shown, the orthographic projection of the edge of the second end 320 onto the substrate 100 lies between the orthographic projection of the edge of the first electrode 210 onto the substrate 100 and the orthographic projection of the edge of the first end 310 onto the substrate 100. This design prevents the edge of the first electrode 210 from extending below the second end 320, thus avoiding an increase in the height of the surface of the light-emitting device 200 at that edge due to the placement of the first electrode 210. This provides sufficient space for the first encapsulation layer 510, enabling it to achieve a good encapsulation effect. Correspondingly, the overall design height of the isolation structure 300 can be reduced, further reducing the width of the isolation structure 300 between adjacent first openings 301 and achieving better light emission quality.

[0466] For example, in some designs, such as Figure 21B As shown, it is possible to... Figure 20 and Figure 21A The first electrode 210 shown is modified so that the distribution of the first electrode 210 extends into the second spacing L1, that is, the orthographic projection of the edge of the first electrode 210 on the substrate 100 is located between the orthographic projection of the edge of the second end 320 on the substrate 100 and the orthographic projection of the edge of the first end 310 on the substrate 100. Thus, on the cross-section of the light-emitting device 200, the first distance L0 between the orthographic projection of the edge of the first electrode 210 on the substrate 100 and the orthographic projection of the edge of the second end 320 on the substrate 100 is less than: the cotangent of the acute angle (denoted as Θ) at which the line connecting the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects the surface of the substrate 100, and the distance L1 between the middle portion of the light-emitting functional layer 220 toward the lower surface of the substrate 100 and the edge of the second end 320 in the direction perpendicular to the surface of the substrate 100. That is, the edge of the first electrode 210 extends into the range of the second distance L1, and within the range of the second distance L1, the thickness of the light-emitting functional layer 220 is non-uniform (gradually thinning). In this way, the first electrode 210 can be guaranteed to have a large area, which can better ensure that the first electrode 210 exists in the area with uniform film thickness of the light-emitting functional layer 220 (such as the effective functional area 202 mentioned above), thereby increasing the area of ​​the uniform light-emitting area of ​​the light-emitting device 200 (where the film thickness of the light-emitting functional layer 220 is uniform) and increasing the aperture ratio of the display panel. In addition, this design provides sufficient margin for the alignment accuracy of the first electrode 210 and the isolation structure 300. Even if there is a misalignment between the positions of the first electrode 210 and the isolation structure 300, the area and position of the uniform light-emitting area of ​​the light-emitting device 200 can be guaranteed to remain unaffected.

[0467] For example, in other designs, such as Figure 21A and Figure 21CAs shown, on the cross-section of the light-emitting device 200, the cotangent of the acute angle (denoted as Θ) at which the line connecting the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects the surface of the substrate 100, and the product L1 of the distance L1 between the middle portion 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 surface 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 onto the substrate 100 and the orthogonal projection of the edge of the second end 320 onto the substrate 100. Thus, in the region of the light-emitting device 200 where the first electrode 210 is distributed, the film thickness of the light-emitting functional layer 220 is uniform, thereby ensuring that the wavelength of the light emitted from the light-emitting area of ​​the light-emitting device 200 is relatively consistent, eliminating the problem of stray light of different colors in the light-emitting device 200.

[0468] In embodiments of this disclosure, the partition portion of the isolation structure 300 can be as follows: Figure 21A As shown, it includes a support portion 310 and a blocking portion 320, or it can be as follows: Figure 22 and Figure 23A As shown, the portion located between two adjacent sub-pixels has a cross-section that is roughly inverted trapezoidal. The specific design of the isolation structure 300 under these two forms can be found in the relevant descriptions in the aforementioned embodiments, and will not be repeated here.

[0469] For example, such as Figure 20 and Figure 21A As shown, when the partition portion of the isolation structure 300 is designed to include a support portion 310 and a blocking portion 320, the width L5 of the surface of the support portion 310 facing the blocking portion 320 between two adjacent first openings is not less than a safe width. Along the direction from any first opening to the adjacent first opening, the width of the isolation structure 300 is not less than twice the first width L2, twice the distance between the orthographic projection of the edge of the top surface of the support portion 310 onto the substrate and the orthographic projection of the edge of the bottom surface of the support portion 310 onto the substrate (the difference between L6 and L2), and the minimum safe width (L5). It should be noted that the difference between L6 and L2 can be determined based on the inclination of the sidewall of the support portion 310. A larger difference between L6 and L2 facilitates the attachment of the edge of the second electrode 320 to the sidewall of the support portion 310; furthermore, a smaller difference between L6 and L2 results in a smaller width of the isolation structure 300 between the two first openings, which helps to improve the pixel density of the display panel. The safe width refers to the width of the surface of the support portion 310 facing the blocking portion 320 that meets the functional requirements. This safe width can be obtained through experimental testing. When determining the safe width, if it is determined that the Z value meets the functional requirements and no smaller value is determined to meet the requirements, the Z value should be considered the safe width; among the multiple determined values ​​that meet the functional requirements, the smallest value can be taken as the safe width.

[0470] For example, such as Figure 21A As shown, the partition portion of the isolation structure 300 includes a support portion 310 and a blocking portion 320 stacked on the substrate 100. On the cross-section of the light-emitting device, the blocking portion 320 has an inclined sidewall 321. The difference between the acute angle Θ1 at which the line connecting the edge of the second electrode 230 and the edge of the blocking portion 320 intersects the surface of the substrate 100, and the acute angle A at which the sidewall of the blocking portion 320 intersects the surface of the substrate 100, is not less than a preset angle; that is, the acute angle A at which the sidewall of the blocking portion 320 intersects the surface of the substrate 100 is less than the acute angle Θ1 at which the line connecting the edge of the second electrode 230 and the edge of the blocking portion 320 intersects the surface of the substrate 100. This prevents the surface of the blocking portion 320 facing away from the substrate 100 from causing undesirable excessive obstruction to the vapor deposition material during the vapor deposition process. For example, the sidewall of the blocking portion 320 is the surface defined by its edge facing the support portion 310 and its edge facing away from the support portion 310. Furthermore, in the embodiments of this disclosure, the preset angle should be able to satisfy the following: during the vapor deposition process of all vapor deposition layers, the normal vapor deposition material should not be blocked from reaching the corresponding position due to the presence of vapor deposition material adhering to the sidewall. Under the above conditions, the specific numerical range of the preset angle is not further limited.

[0471] For example, such as Figure 22 and Figure 23A As shown, when the partition portion located between two adjacent sub-pixels is approximately trapezoidal, 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 no less than a safety width. Along the direction from any first opening to the adjacent first opening, the width of the isolation structure 300 is no less than twice the sum of the first width L2 and the safety width. The minimum value of this safety width can be designed based on the fabrication process of the isolation structure 300 (e.g., the precision of photolithography). Similarly, the safety width refers to the width that meets the functional requirements, which can be obtained through experimental testing or experience. When determining the safety width, if it is determined that the Z value meets the functional requirements and no smaller value meets the requirements, the Z value should be considered the safety width; among the multiple values ​​that meet the functional requirements, the minimum value can be used as the safety width.

[0472] In embodiments of this disclosure, the partition portion of the isolation structure 300 can be as follows: Figure 21A and Figure 22 As shown, it can be directly disposed on the substrate 100, or, as shown in the figure, it can be disposed on the substrate 100. Figure 23A The partition portion of the isolation structure 300 shown is separated from the substrate 100 by other structures (such as a pixel defining layer). Under different designs, the calculation method of the width of the isolation structure 300 between the two first openings is different, as detailed below.

[0473] In some embodiments of this disclosure, such as Figures 21A to 21C and Figure 22 As shown, the partition portion of the isolation structure 300 can be directly disposed on the substrate 100, that is, the partition portion of the isolation structure 300 is in direct contact with the substrate 100.

[0474] For example, in a specific example, such as Figure 21B As shown, when the partition portion of the isolation structure 300 is in direct contact with the substrate 100 (e.g., without a pixel defining layer), on the front cross-section of the light-emitting device, the distance between the orthogonal projection of the edge of the first electrode on the substrate and the orthogonal projection of the edge of the second end on the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the product of the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate. That is, the first spacing L0 and the second spacing L1 do not coincide, and the size of the first spacing L0 is smaller than the size of the second spacing L1. Specifically, the first spacing 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 less than: the product of the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects the surface of the substrate 100, and the difference between the first height h1 and the thickness of the first electrode.

[0475] For example, in another specific example, such as Figure 21A and Figure 21C As shown, when the partition portion of the isolation structure 300 is in direct contact with the substrate 100, the product of the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate on the cross-section of the light-emitting device, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in the direction perpendicular to the surface of the substrate, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode on the substrate and the orthogonal projection of the edge of the second end on the substrate. It should be noted that, under this equality relationship, the first spacing L0 and the second spacing L1 are as follows: Figure 21A or Figure 22 The first spacing L0 and the second spacing L1 do not overlap; correspondingly, under the relationship of less than, the size of the first spacing L0 will be larger than the size of the second spacing L1.

[0476] Specifically, under the above-mentioned equality relationship (the first spacing L0 coincides with the second spacing L1), the first spacing L0 between the orthographic projection of the edge of the first electrode 210 on the substrate 100 and the orthographic projection of the edge of the second end 320 on the substrate 100 is equal to the product of the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects the surface where the substrate 100 is located, and the difference between the first height h1 and the thickness of the first electrode.

[0477] Specifically, under the aforementioned less-than relationship (the size of the first spacing L0 is greater than the size of the second spacing L1), the product of the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects the surface where the substrate 100 is located, and the first height h1, is less than: the first spacing L0 between the orthographic projection of the edge of the first electrode 210 on the substrate 100 and the orthographic projection of the edge of the second end 320 on the substrate 100.

[0478] In other embodiments of this disclosure, such as Figure 23A As shown, the display panel may also include a pixel defining layer 330, which is located on the first electrode 210 and on the side of the partition portion facing the substrate 100 and defines a second opening 302. The first electrode 210 is exposed from the second opening 302, and the edge of the first end 310 is located in the upper surface of the pixel defining layer 330 away from the substrate 100.

[0479] For example, such as Figure 23B As shown, on the cross-section of the light-emitting device 200, the distance L0 between the orthographic projection of the edge of the first electrode 210 exposed from the second opening 302 onto the substrate 100 and the orthographic projection of the edge of the second end 320 onto the substrate 100 is less than: the cotangent of the acute angle Θ at which the line connecting the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects the surface of the substrate 100, and the distance L1 between the middle portion of the lower surface of the light-emitting functional layer 220 and the edge of the second end 320 in the direction perpendicular to the surface of the substrate 100. Thus, the first electrode 210 is present in regions where the film thickness of the light-emitting functional layer 220 is uniform (e.g., the aforementioned effective functional region 202), thereby increasing the area of ​​the uniform light-emitting region of the light-emitting device 200 (where the film thickness of the light-emitting functional layer 220 is uniform) and increasing the aperture ratio of the display panel.

[0480] Regarding the above relationship, when the display panel is provided with a pixel defining layer 330, the first electrode 210 can extend below the isolation structure 300. Correspondingly, the isolation structure 300 is configured 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. Thus, the distance between the middle portion of the lower surface of the light-emitting functional layer 220 and the edge of the second end 320 in the 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. That is, on the positive cross section of the light-emitting device 200, the distance L0 between the orthographic projection of the edge of the first electrode 210 exposed from the second opening 302 on the substrate 100 and the orthographic projection of the edge of the second end 320 on the substrate 100 is less than the product L1 of the acute angle Θ of the line connecting the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersecting the plane of the substrate 100 and the first height h1 and the thickness of the pixel defining layer 330.

[0481] For example, such as Figure 23A and Figure 23C As shown, on the cross-section of the light-emitting device 200, the cotangent of the acute angle Θ at which the line connecting the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects the surface of the substrate 100, and the product L1 of the distance L1 between the middle portion 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 surface 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 exposed from the second opening 302 onto the substrate 100 and the orthogonal projection of the edge of the second end 320 onto the substrate 100. Thus, in the region of the light-emitting device 200 where the first electrode 210 is distributed, the film thickness of the light-emitting functional layer 220 is uniform, thereby ensuring that the wavelength of the light emitted from the light-emitting area of ​​the light-emitting device 200 is relatively consistent, eliminating the problem of stray light of different colors in the light-emitting device 200.

[0482] Regarding the above relationship, when the display panel is provided with a pixel defining layer 330, the first electrode 210 can extend below the isolation structure 300. Correspondingly, the isolation structure 300 is configured 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. Thus, the cotangent of the acute angle Θ at which the line connecting the edge of the light-emitting functional layer 220 and the edge of the second end 320 intersects the surface where the substrate 100 is located, and the product L1 of 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 orthographic projection of the edge of the first electrode 210 exposed from the second opening 302 onto the substrate 100 and the orthographic projection of the edge of the second end 320 onto the substrate 100.

[0483] For example, the pixel defining layer 330 is an inorganic layer. The portion of the pixel defining layer 330 covering the gap between adjacent first electrodes 210 has a groove conforming to the gap, and the surface of the first end 310 facing the substrate 100 is covered with the groove. The inorganic pixel defining layer 330 can have a smaller thickness design, thereby having a smaller step at the edge of the pixel defining layer 330 to improve the continuity of the second electrode 230 at that edge; in addition, this design can reduce the degree of increase in the height of the isolation structure 300 caused by the provision of the pixel defining layer 330; furthermore, the first end 310 completely covers the groove, thereby eliminating the influence of the groove on the isolation structure 300 to ensure that the height is the same at all points along the edge of the first end 310.

[0484] For example, the distance between the middle portion of the lower surface of the light-emitting functional layer 220 and the edge of the second end 320 in the direction perpendicular to the surface of the substrate 100 is equal to the sum of the first height h1 and the thickness of the pixel defining layer 330.

[0485] In the embodiments of this disclosure, the specific shape of the isolation structure and whether or not a pixel delimiting layer is provided can be selected according to the specific circumstances.

[0486] For example, in some examples, see again. Figure 22 The partition portion of the isolation structure 300 located between two adjacent sub-pixels is an inverted trapezoid, which can be directly disposed on the substrate 100 so as to directly contact the substrate 100. The calculation method for the positional relationship between the isolation structure, the first electrode, and the light-emitting functional layer can be found in the relevant description in the foregoing embodiments, and will not be repeated here.

[0487] For example, in other examples, such as Figures 23A to 23C As shown, the partition portion of the isolation structure 300 located between two adjacent sub-pixels is an inverted trapezoid. The display panel includes a pixel defining layer 330, and the partition portion of the isolation structure 300 is disposed on the pixel defining layer 330. The calculation method for the positional relationship between the partition portion and the first electrode, the light-emitting functional layer, and the pixel defining layer can be found in the relevant description in the foregoing embodiments, and will not be repeated here.

[0488] For example, in other examples, such as Figure 24 As shown, the partition portion of the isolation structure 300 is designed to include a support portion 310 and a blocking portion 320. The partition portion of the isolation structure 300 can be directly disposed on the substrate 100 (i.e., no pixel defining layer is disposed between the partition portion and the substrate) so as to directly contact the substrate 100. The calculation method for the positional relationship between the partition portion and the first electrode and the light-emitting functional layer can be found in the relevant description in the foregoing embodiments, and will not be repeated here.

[0489] For example, in other examples, such as Figure 25As shown, the partition portion of the isolation structure 300 is designed to include a support portion 310 and a blocking portion 320. The display panel includes a pixel defining layer 330. The partition portion of the isolation structure 300 is disposed on the pixel defining layer 330. The calculation method for the positional relationship between the isolation structure and the first electrode, the light-emitting functional layer, and the pixel defining layer can be found in the relevant description in the foregoing embodiments, and will not be repeated here.

[0490] The above describes how to calculate the width between adjacent first openings of the isolation structure. In this calculation method, the first spacing L0 is calculated simultaneously. Therefore, the spacing between two sub-pixels, i.e. the spacing between effective functional areas, can be obtained. Combined with the specific pixel arrangement and the width of the sub-pixels in each pixel, the pixel density of the display panel can b...

Claims

1. A display panel, characterized in that, include: substrate; An isolation structure is located on the substrate and includes a partition portion, wherein the partition portion includes a first end and a second end, the second end is located on the side of the first end away from the substrate, the orthographic projection of the first end on the substrate is located within the orthographic projection of the second end on the substrate, and the isolation structure defines a plurality of first openings; A display functional layer is located on the substrate and includes a plurality of light-emitting devices located within corresponding first openings. Each light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked on the substrate. The first opening limits the corresponding light-emitting device. The first encapsulation layer is located on the side of the display functional layer away from the substrate, and includes first encapsulation units corresponding to the first opening, wherein the edge of the first encapsulation unit extends to the side of the second end away from the substrate and there is a gap between the first encapsulation unit and the second end. A second encapsulation layer covers the first encapsulation layer and fills at least a portion of the gap between the first encapsulation unit and the second end. Wherein, the orthographic projection of a portion of the edge of at least a portion of the film layer of the light-emitting device onto the substrate lies within the orthographic projection of the second end onto the substrate, and the thickness of the edge portion of at least a portion of the film layer of the light-emitting device gradually decreases from the center of the light-emitting device to the corresponding edge. The orthographic projection of the edge of the second end onto the substrate is at least partially located within the orthographic projection of the edge portion of the film layer of the light-emitting device, which has a gradually decreasing thickness, onto the substrate, and within the cross-section of the light-emitting device, the first encapsulation layer forms a closed cavity on the side of the isolation structure.

2. The display panel according to claim 1, characterized in that, 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 the first height. Within the cross-section of the light-emitting device, the position of the first encapsulation layer facing the substrate, located on a straight line passing through the edge of the second end and perpendicular to the surface of the substrate, is the distance between the first end edge and the edge of the first end in the direction perpendicular to the surface of the substrate; this distance is the isolation-associated height. The difference between the first height and the isolation-associated height is not less than the encapsulation safety margin. At the middle position of the light-emitting device, the first encapsulation layer has a second thickness, the first encapsulation layer covers the light-emitting device and part of the side of the second end, and the encapsulation safety margin is equal to the product of the second thickness and a second thickness coefficient, the second thickness coefficient being 0.2-2.

3. The display panel according to claim 2, characterized in that, Along a direction perpendicular to the surface of the substrate, the distance from the edge of the second end to the edge of the first end is the first height, and at the middle position of the light-emitting device, the spacing between the first encapsulation layer and the first electrode is the second height. The product of the second height and the first thickness coefficient is the first value. The difference between the first height and the first value is not less than the encapsulation safety margin. The first thickness coefficient is equal to M, M is equal to 0.5 ± 0.2, and M is the ratio of the partition association height to the second height.

4. The display panel according to claim 2, characterized in that, The display panel includes a plurality of sub-pixels, each sub-pixel having two opposing long sides and two opposing short sides. Some sub-pixels have only the short side having an edge portion whose thickness gradually decreases along the direction from the center of the light-emitting device to the corresponding edge, while the long side does not have an edge portion whose thickness gradually decreases along the direction from the center of the light-emitting device to the corresponding edge.

5. The display panel according to any one of claims 2 to 4, characterized in that, The distance between the orthographic projection of the edge of the second end onto the surface of the substrate and the orthographic projection of the edge of the first end onto the surface of the substrate is a first width, and Within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line passing through the edge of the second electrode and the edge of the second end with the surface where the substrate is located is the first tilt angle, and the first width is less than the product of the first height and the cotangent of the first tilt angle.

6. The display panel according to claim 5, characterized in that, The second electrode has a raised tail that overlaps the side surface of the first end.

7. The display panel according to claim 5, characterized in that, Within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line of the edge of the light-emitting functional layer and the second end edge with the plane where the substrate is located is the tilt angle of the light-emitting functional layer, which is greater than the first tilt angle.

8. The display panel according to claim 7, characterized in that, The first width is greater than the product of the first height and the cotangent of the tilt angle of the light-emitting functional layer.

9. The display panel according to claim 7, characterized in that, The light-emitting functional layer includes a first functional layer. Within the cross-section of the light-emitting device, the acute angle formed by the intersection of the straight line passing through the edge of the first functional layer and the edge of the second end with the plane where the substrate is located is the second tilt angle, which is greater than the tilt angle of the light-emitting functional layer.

10. The display panel according to claim 9, characterized in that, The light-emitting functional layer further includes a light-emitting layer and a second functional layer, wherein the light-emitting layer and the second functional layer cover the edge of the first functional layer.

11. The display panel according to claim 10, characterized in that, Within the cross-section of the light-emitting device, the thickness of the second electrode at the position passing through the edge of the first electrode and perpendicular to the surface of the substrate is less than the thickness of the portion of the second electrode corresponding to the middle position of the light-emitting device.

12. The display panel according to any one of claims 2 to 4, characterized in that, The orthographic projection of the edge of the second end onto the substrate is located between the orthographic projection of the edge of the first electrode onto the substrate and the orthographic projection of the edge of the first end onto the substrate.

13. The display panel according to claim 12, characterized in that, On the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode on the substrate and the orthographic projection of the edge of the second end on the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the surface of the substrate.

14. The display panel according to claim 12, characterized in that, On the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the plane where the substrate is located, and the product of the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the plane where the substrate is located, is less than or equal to: the distance between the orthographic projection of the edge of the first electrode on the substrate and the orthographic projection of the edge of the second end on the substrate.

15. The display panel according to any one of claims 2 to 4, characterized in that, It also includes a pixel defining layer, which is located on the first electrode and on the side of the partition portion facing the substrate and defines a second opening, through which the first electrode is exposed, and the edge of the first end is located within the upper surface of the pixel defining layer.

16. The display panel according to claim 15, characterized in that, On the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode exposed from the second opening onto the substrate and the orthographic projection of the edge of the second end onto the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the surface of the substrate.

17. The display panel according to claim 15, characterized in that, On the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the plane where the substrate is located, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the plane where the substrate is located, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode exposed from the second opening on the substrate and the orthogonal projection of the edge of the second end on the substrate.

18. The display panel according to claim 15, characterized in that, The pixel defining layer is an inorganic layer, and the portion of the pixel defining layer covering the gap between adjacent first electrodes has a groove conforming to the gap, with the surface of the first end facing the substrate covering the groove.

19. The display panel according to claim 18, characterized in that, The distance between the middle portion of the lower surface of the light-emitting functional layer and 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.

20. The display panel according to claim 1, characterized in that, It also includes a protective layer, wherein the protective layer is an insulating layer and the protective layer includes a plurality of protective units, the protective units being located between the first electrode and the first end.

21. The display panel according to claim 20, characterized in that, The protective unit covers the sidewall of the first electrode and is spaced apart from the first end of the isolation structure; or, the protective unit covers both the sidewall of the first electrode and the sidewall of the first end.

22. The display panel according to claim 20, characterized in that, A straight line perpendicular to the plane where the substrate is located and passing through the edge of the second end passes through the protection unit.

23. The display panel according to claim 20, characterized in that, The protective unit is spaced from the first end of the isolation structure. Along a direction perpendicular to the surface of the substrate, the distance between the edge of the second end and the edge of the first end in a direction perpendicular to the surface of the substrate is a first height. Within the cross-section of the light-emitting device, the position of the surface of the first encapsulation layer facing the substrate, located on a straight line passing through the edge of the second end and perpendicular to the surface of the substrate, is the distance between the first end and the edge of the first end in a direction perpendicular to the surface of the substrate; this distance is the isolation-associated height. The difference between the first height and the isolation-associated height is not less than the encapsulation safety margin. Alternatively, Along a direction perpendicular to the surface of the substrate, the distance from the edge of the second end to the edge of the first end is the first height, and at the middle position of the light-emitting device, the spacing between the first encapsulation layer and the first electrode is the second height. The product of the second height and the first thickness coefficient is the first value, and the sum of the first value and the thickness of the protection unit is the second value. The difference between the first height and the second value is not less than the encapsulation safety margin. The first thickness coefficient is equal to M, M is equal to 0.5 ± 0.2, and M is the ratio of the partition association height to the second height. Wherein, at the middle position of the light-emitting device, the first encapsulation layer has a second thickness, the first encapsulation layer covers the light-emitting device and part of the side of the second end, and the encapsulation safety margin is equal to the product of the second thickness and the second thickness coefficient, the second thickness coefficient being 0.2-2.

24. The display panel according to claim 20, characterized in that, The protective layer covers the sidewalls of the first electrode and a portion of the sidewalls of the first end. Along a direction perpendicular to the plane of the substrate, the distance between the edge of the second end and the edge of the first end in a direction perpendicular to the plane of the substrate is a first height. Within the cross-section of the light-emitting device, the position of the surface of the first encapsulation layer facing the substrate, located on a straight line passing through the edge of the second end and perpendicular to the plane of the substrate, is the distance between the first end and the edge of the first end in a direction perpendicular to the plane of the substrate as a separation-related height. The difference between the first height and the separation-related height is not less than the encapsulation safety margin; or... Along a direction perpendicular to the surface of the substrate, the distance from the edge of the second end to the edge of the first end is the first height, and at the middle position of the light-emitting device, the spacing between the first encapsulation layer and the first electrode is the second height. The product of the second height and the first thickness coefficient is the first value. The difference between the first height and the first value is not less than the encapsulation safety margin. The first thickness coefficient is equal to M, M is equal to 0.5 ± 0.2, and M is the ratio of the partition-related height to the second height. Wherein, at the middle position of the light-emitting device, the first encapsulation layer has a second thickness, the first encapsulation layer covers the light-emitting device and part of the side of the second end, and the encapsulation safety margin is equal to the product of the second thickness and the second thickness coefficient, the second thickness coefficient being 0.2-2.

25. The display panel according to claim 20, characterized in that, On the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode exposed from the protective layer onto the substrate and the orthographic projection of the edge of the second end onto the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the surface of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the surface of the substrate.

26. The display panel according to claim 20, characterized in that, On the cross-section of the light-emitting device, the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the plane where the substrate is located, and the product of the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the plane where the substrate is located, is less than or equal to the distance between the orthogonal projection of the edge of the first electrode exposed from the protective layer on the substrate and the orthogonal projection of the edge of the second end on the substrate.

27. The display panel according to claim 20, characterized in that, The first end portion includes a connecting portion facing the side of the substrate, and the connecting portion and the first electrode are in the same layer and made of the same material.

28. The display panel according to claim 20, characterized in that, The protection unit is spaced from the first end of the isolation structure. The substrate includes a first planarization layer and a second planarization layer on the side facing the isolation structure. The second planarization layer is located between the first planarization layer and the isolation structure, and between the first planarization layer and the first electrode. The first planarization layer is an organic layer, and the second planarization layer is an inorganic layer.

29. The display panel according to any one of claims 3 to 4, characterized in that, It also includes at least one optical functional layer, wherein the optical functional layer is located on the side of the light-emitting functional layer away from the substrate, and includes a plurality of optical functional units.

30. The display panel according to claim 29, characterized in that, The optical functional unit is configured to include at least one of the following: a color conversion unit, a light extraction unit, a light control unit, a filling unit, and a filtering unit; or, the optical functional unit is configured to include at least two of the following: at least two of the following: a color conversion unit, a light extraction unit, a light control unit, a filling unit, and a filtering unit.

31. The display panel according to claim 29, characterized in that, On the cross-section of the light-emitting device, the acute angle at which the line connecting the edge of the optical functional unit to the edge of the second end intersects the surface of the substrate is greater than or equal to the acute angle at which the line connecting the edge of the light-emitting functional layer to the edge of the second end intersects the surface of the substrate.

32. The display panel according to claim 29, characterized in that, The optical functional unit is located between the light-emitting functional layer and the first encapsulation layer. The optical functional unit is disposed in at least a portion of the first opening. A portion of the edge portion of the optical functional unit is projected onto the substrate within the projection of the second end onto the substrate. The thickness of the edge portion of the optical functional unit gradually decreases along the direction from the center of the light-emitting device to the corresponding edge.

33. The display panel according to any one of claims 2 to 4, characterized in that, The partition includes a support portion and a blocking portion stacked on the substrate, wherein the support portion constitutes the first end portion and the blocking portion constitutes the second end portion.

34. The display panel according to claim 33, characterized in that, The first encapsulation layer and the surface of the blocking portion are in contact, and the first encapsulation layer and the blocking portion are made of the same material.

35. The display panel according to claim 33, characterized in that, The support portion is provided with a grid-like dividing hole, which divides the support portion into multiple sub-support portions. The blocking portion covers and fills the dividing hole. The support portion is a conductive structure, and the blocking portion is an insulating structure. The second electrode is connected to the corresponding sub-support portion.

36. The display panel according to any one of claims 2 to 4, characterized in that, The partition includes a support portion and a blocking portion stacked on the substrate. On the cross-section of the light-emitting device, the blocking portion has an inclined sidewall. The difference between the acute angle at which the line connecting the edge of the second electrode and the edge of the second end intersects the surface of the substrate and the acute angle at which the sidewall of the blocking portion intersects the surface of the substrate is not less than a preset angle.

37. The display panel according to any one of claims 2 to 4, characterized in that, The first end and the second end of the partition are integral structures, and in the direction perpendicular to the plane of the substrate, the cross-sectional profile of the part of the partition located between two adjacent sub-pixels 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.

38. A display panel, characterized in that, It includes a substrate and an isolation structure, a display functional layer, a first encapsulation layer, and a second encapsulation layer located on the substrate, wherein, The isolation structure includes a partition portion, which includes a first end and a second end. The second end is located on the side of the first end away from the substrate. The orthographic projection of the first end on the substrate lies within the orthographic projection of the second end on the substrate. The isolation structure defines a plurality of first openings. The display functional layer includes a plurality of light-emitting devices located within corresponding first openings. Each light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked on the substrate. The first opening limits the corresponding light-emitting device. The first encapsulation layer is located on the side of the display functional layer away from the substrate, and includes first encapsulation units corresponding to the first opening, wherein the edge of the first encapsulation unit extends to the side of the second end away from the substrate and there is a gap between the first encapsulation unit and the second end, and the second encapsulation layer covers the first encapsulation layer and fills at least a portion of the gap between the first encapsulation unit and the second end. The distance between the first electrode of an adjacent light-emitting device and the edge of the corresponding contact portion of the light-emitting functional layer is the pixel pitch, which is 2000-18000 nanometers. Along the direction from the middle of the light-emitting device to the corresponding edge, the thickness of at least a portion of the film layer of the light-emitting device gradually decreases at the edge. The orthographic projection of the edge of the second end on the substrate is at least partially located within the orthographic projection of the edge portion of the film layer of the light-emitting device that gradually decreases in thickness on the substrate. In the cross-section of the light-emitting device, the first encapsulation layer forms a closed cavity on the side of the isolation structure.

39. The display panel according to claim 38, characterized in that, On the front cross-section of the light-emitting device, the cross-sectional profile of the portion of the partition located between two adjacent sub-pixels is an inverted trapezoid, wherein the width of the apex of the inverted trapezoid is 1258-16000 nanometers; or The partition portion includes a support portion and a blocking portion stacked on the substrate. The support portion constitutes the first end portion, and the blocking portion constitutes the second end portion. On the front cross-section of the light-emitting device, the cross-sectional profiles of the portions of the support portion and the blocking portion located between two adjacent sub-pixels are both trapezoidal. The edge of the second end portion is the edge of the blocking portion facing the substrate, and the edge of the first end portion is the edge of the support portion facing the substrate. The width of the base of the trapezoid corresponding to the support portion is 1258-17000 nm, and the width of the top of the trapezoid corresponding to the support portion is 880-15000 nm.

40. The display panel according to claim 38 or 39, characterized in that, It includes multiple pixels, and each pixel includes multiple sub-pixels that emit light of different wavelengths. The multiple sub-pixels of the multiple pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel. The first sub-pixel, the second sub-pixel, and the third sub-pixel each include different light-emitting devices.

41. The display panel according to claim 40, characterized in that, The ratio of the number of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 1:1:

1.

42. The display panel according to claim 41, characterized in that, Each pixel is arranged in a first pixel arrangement, with the first sub-pixel, the second sub-pixel, and the third sub-pixel side by side; or, each pixel is arranged in a second pixel arrangement, with the second sub-pixel and the third sub-pixel arranged in a column / row and side by side with the first sub-pixel.

43. The display panel according to claim 40, characterized in that, The partition portion of the isolation structure is in direct contact with the substrate. The distance between the orthographic projection of the edge of the second end on the substrate surface and the orthographic projection of the edge of the first end on the substrate surface is a first width. The distance between the orthographic projection of the edge of the portion of the first electrode in contact with the light-emitting functional layer in the same light-emitting device and the edge of the second end on the substrate surface is a first spacing. The edge of the first spacing is the edge of the portion of the first electrode in contact with the light-emitting functional layer in the same light-emitting device. The pixel pitch is 2000-2200 nanometers, the first pitch is 0-1017 nanometers, and the first width is 148-417 nanometers; or The pixel pitch is 2200-2500 nanometers, the first pitch is 0-1050 nanometers, and the first width is 166-450 nanometers; or The pixel pitch is 2500-3200 nanometers, the first pitch is 0-1090 nanometers, and the first width is 185-490 nanometers; or The pixel pitch is 3200-4000 nanometers, the first pitch is 0-1130 nanometers, and the first width is 203-530 nanometers; or The pixel pitch is 4000-6000 nanometers, the first pitch is 0-1170 nanometers, and the first width is 221-570 nanometers; or The pixel pitch is 6000-9000 nanometers, the first pitch is 0-1210 nanometers, and the first width is 240-610 nanometers; or The pixel pitch is 9000-13000 nanometers, the first pitch is 0-1300 nanometers, and the first width is 259-700 nanometers; or The pixel pitch is 13000-18000 nanometers, the first pitch is 0-1410 nanometers, and the first width is 277-810 nanometers.

44. The display panel according to claim 43, characterized in that, On the cross-section of the light-emitting device, the cotangent of the acute angle formed by the line connecting the edge of the light-emitting functional layer and the edge of the second end to the plane of the substrate, multiplied by the distance between the middle portion of the lower surface of the light-emitting functional layer and 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 orthographic projection of the edge of the first electrode on the substrate and the orthographic projection of the edge of the second end on the substrate. The pixel pitch is 2000-2200 nanometers, and the first pitch is 148-567 nanometers; or The pixel pitch is 2200-2500 nanometers, and the first pitch is 166-650 nanometers; or The pixel pitch is 2500-3200 nanometers, and the first pitch is 185-740 nanometers; or The pixel pitch is 3200-4000 nanometers, and the first pitch is 203-830 nanometers; or The pixel pitch is 4000-6000 nanometers, and the first pitch is 221-920 nanometers; or The pixel pitch is 6000-9000 nanometers, and the first pitch is 240-1010 nanometers; or The pixel pitch is 9000-13000 nanometers, and the first pitch is 259-1150 nanometers; or The pixel pitch is 13000-18000 nanometers, and the first pitch is 277-1310 nanometers.

45. The display panel according to claim 44, characterized in that, 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, which is 400-2200 nanometers.

46. ​​The display panel according to claim 45, characterized in that, The pixel pitch is 2000-2200 nanometers, and the first height is 400-800 nanometers; or The pixel pitch is 2200-2500 nanometers, and the first height is 450-850 nanometers; or The pixel pitch is 2500-3200 nanometers, and the first height is 500-900 nanometers; or The pixel pitch is 3200-4000 nanometers, and the first height is 550-950 nanometers; or The pixel pitch is 4000-6000 nanometers, and the first height is 600-1000 nanometers; or The pixel pitch is 6000-9000 nanometers, and the first height is 650-1100 nanometers; or The pixel pitch is 9000-13000 nanometers, and the first height is 700-1200 nanometers; or The pixel pitch is 13,000-18,000 nanometers, and the first height is 750-2,200 nanometers.

47. The display panel according to claim 43, characterized in that, On the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode on the substrate and the orthographic projection of the edge of the second end on the substrate is less than: the cotangent of the acute angle at which the line connecting the edge of the light-emitting functional layer and the edge of the second end intersects the plane of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the plane of the substrate; and The pixel pitch is 2000-2200 nanometers, the first pitch is 0-415 nanometers, and the first width is 148-417 nanometers; or The pixel pitch is 2200-2500 nanometers, the first pitch is 0-446 nanometers, and the first width is 166-450 nanometers; or The pixel pitch is 2500-3200 nanometers, the first pitch is 0-484 nanometers, and the first width is 185-490 nanometers; or The pixel pitch is 3200-4000 nanometers, the first pitch is 0-522 nanometers, and the first width is 203-530 nanometers; or The pixel pitch is 4000-6000 nanometers, the first pitch is 0-560 nanometers, and the first width is 221-570 nanometers; or The pixel pitch is 6000-9000 nanometers, the first pitch is 0-598 nanometers, and the first width is 240-610 nanometers; or The pixel pitch is 9000-13000 nanometers, the first pitch is 0-685 nanometers, and the first width is 259-700 nanometers; or The pixel pitch is 13000-18000 nanometers, the first pitch is 0-790 nanometers, and the first width is 277-810 nanometers.

48. The display panel according to claim 43, characterized in that, It also includes at least one optical functional layer, wherein the optical functional layer is located on the side of the light-emitting functional layer away from the substrate, and includes a plurality of optical functional units located within the first opening, wherein the thickness of at least a portion of the film layer of the optical functional units gradually decreases at its edge. For each pair of adjacent first electrodes, the pixel pitch between the edges of the portions of the first electrodes that are in contact with the light-emitting functional layer in the same light-emitting device is 2074-18000 nanometers.

49. The display panel according to claim 40, characterized in that, It also includes a pixel defining layer located on the first electrode and on the side of the partition portion facing the substrate, defining a second opening. The pixel defining layer covers the edge of the first electrode, the second opening exposes the first electrode, and the edge of the second opening coincides with the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device. The distance between the orthographic projection of the edge of the second end on the substrate surface and the orthographic projection of the edge of the first end on the substrate surface is a first width. The distance between the orthographic projection of the edge of the first electrode that contacts the light-emitting functional layer in the same light-emitting device and the edge of the second end on the substrate surface is a first spacing. The pixel pitch is 2200-2500 nanometers, the first pitch is 0-1050 nanometers, and the first width is 148-450 nanometers; or The pixel pitch is 2500-3200 nanometers, the first pitch is 0-1090 nanometers, and the first width is 185-490 nanometers; or The pixel pitch is 3200-4000 nanometers, the first pitch is 0-1130 nanometers, and the first width is 203-530 nanometers; or The pixel pitch is 4000-6000 nanometers, the first pitch is 0-1170 nanometers, and the first width is 221-570 nanometers; or The pixel pitch is 6000-9000 nanometers, the first pitch is 0-1210 nanometers, and the first width is 240-610 nanometers; or The pixel pitch is 9000-13000 nanometers, the first pitch is 0-1300 nanometers, and the first width is 259-700 nanometers; or The pixel pitch is 13000-18000 nanometers, the first pitch is 0-1410 nanometers, and the first width is 277-810 nanometers.

50. The display panel according to claim 49, characterized in that, On the cross-section of the light-emitting device, the cotangent of the acute angle formed by the line connecting the edge of the light-emitting functional layer and the edge of the second end to the plane of the substrate, multiplied by the distance between the middle portion of the lower surface of the light-emitting functional layer and 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 orthographic projection of the edge of the first electrode exposed from the second opening onto the substrate and the orthographic projection of the edge of the second end onto the substrate. The pixel pitch is 2200-2500 nanometers, the first pitch is 148-650 nanometers, and the first width is 148-450 nanometers; or The pixel pitch is 2500-3200 nanometers, the first pitch is 185-740 nanometers, and the first width is 185-490 nanometers; or The pixel pitch is 3200-4000 nanometers, the first pitch is 203-830 nanometers, and the first width is 203-530 nanometers; or The pixel pitch is 4000-6000 nanometers, the first pitch is 221-920 nanometers, and the first width is 221-570 nanometers; or The pixel pitch is 6000-9000 nanometers, the first pitch is 240-1010 nanometers, and the first width is 240-610 nanometers; or The pixel pitch is 9000-13000 nanometers, the first pitch is 259-1150 nanometers, and the first width is 259-700 nanometers; or The pixel pitch is 13000-18000 nanometers, the first pitch is 277-1310 nanometers, and the first width is 277-810 nanometers.

51. The display panel according to claim 50, characterized in that, 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, which is 400-2200 nanometers.

52. The display panel according to claim 51, characterized in that, The pixel pitch is 2200-2500 nanometers, and the first height is 400-850 nanometers; or The pixel pitch is 2500-3200 nanometers, and the first height is 500-900 nanometers; or The pixel pitch is 3200-4000 nanometers, and the first height is 550-950 nanometers; or The pixel pitch is 4000-6000 nanometers, and the first height is 600-1000 nanometers; or The pixel pitch is 6000-9000 nanometers, and the first height is 650-1100 nanometers; or The pixel pitch is 9000-13000 nanometers, and the first height is 700-1200 nanometers; or The pixel pitch is 13,000-18,000 nanometers, and the first height is 750-2,200 nanometers.

53. The display panel according to claim 49, characterized in that, On the cross-section of the light-emitting device, the distance between the orthographic projection of the edge of the first electrode exposed from the second opening onto the substrate and the orthographic projection of the edge of the second end onto the substrate is less than: the cotangent of the acute angle between the line connecting the edge of the light-emitting functional layer and the edge of the second end intersecting the plane of the substrate, and the distance between the middle portion of the lower surface of the light-emitting functional layer and the edge of the second end in a direction perpendicular to the plane of the substrate. The pixel pitch is 2200-2500 nanometers, the first pitch is 0-446 nanometers, and the first width is 148-450 nanometers; or The pixel pitch is 2500-3200 nanometers, the first pitch is 0-484 nanometers, and the first width is 185-490 nanometers; or The pixel pitch is 3200-4000 nanometers, the first pitch is 0-522 nanometers, and the first width is 203-530 nanometers; or The pixel pitch is 4000-6000 nanometers, the first pitch is 0-560 nanometers, and the first width is 221-570 nanometers; or The pixel pitch is 6000-9000 nanometers, the first pitch is 0-598 nanometers, and the first width is 240-610 nanometers; or The pixel pitch is 9000-13000 nanometers, the first pitch is 0-685 nanometers, and the first width is 259-700 nanometers; or The pixel pitch is 13000-18000 nanometers, the first pitch is 0-790 nanometers, and the first width is 277-810 nanometers.

54. The display panel according to claim 49, characterized in that, It also includes at least one optical functional layer, wherein the optical functional layer is located on the side of the light-emitting functional layer away from the substrate, and includes a plurality of optical functional units located within the first opening, wherein the thickness of at least a portion of the film layer of the optical functional units gradually decreases at its edge. For each pair of adjacent first electrodes, the pixel pitch between the edges of the portions of the first electrodes that are in contact with the light-emitting functional layer in the same light-emitting device is 2274-18000 nanometers.

55. A display panel, characterized in that, It includes a substrate and an isolation structure, a display functional layer, a first encapsulation layer, and a second encapsulation layer located on the substrate, wherein, The isolation structure includes a partition portion, which includes a first end and a second end. The second end is located on the side of the first end away from the substrate. The orthographic projection of the first end on the substrate lies within the orthographic projection of the second end on the substrate. The isolation structure defines a plurality of first openings. The display functional layer includes a plurality of light-emitting devices located within corresponding first openings. Each light-emitting device includes a first electrode, a light-emitting functional layer, and a second electrode stacked on the substrate. The first opening limits the corresponding light-emitting device. The first encapsulation layer is located on the side of the display functional layer away from the substrate, and includes first encapsulation units corresponding to the first opening, wherein the edge of the first encapsulation unit extends to the side of the second end away from the substrate and there is a gap between the first encapsulation unit and the second end, and the second encapsulation layer covers the first encapsulation layer and fills at least a portion of the gap between the first encapsulation unit and the second end. Along the direction from the center of the light-emitting device to the corresponding edge, the thickness of at least a portion of the film layer of the light-emitting device gradually decreases at the edge. The orthographic projection of the edge of the second end onto the substrate is at least partially located within the orthographic projection of the gradually decreasing thickness edge portion of the film layer of the light-emitting device onto the substrate. Furthermore, within the cross-section of the light-emitting device, the first encapsulation layer forms a closed cavity on the side of the isolation structure. The display panel has a pixel density of 90 PPI to 7400 PPI.

56. The display panel according to claim 55, characterized in that, The pixel pitch between the first electrode of the adjacent light-emitting device and the edge of the corresponding contact portion of the light-emitting functional layer is 2000-18000 nanometers.

57. The display panel according to claim 55, characterized in that, On the front cross-section of the light-emitting device, the cross-sectional profile of the portion of the partition located between two adjacent sub-pixels is an inverted trapezoid, with the bottom edge of the inverted trapezoid being the edge of the second end and the top edge of the inverted trapezoid being the edge of the first end; or The partition includes a support portion and a blocking portion stacked on the substrate. The support portion constitutes the first end portion, and the blocking portion constitutes the second end portion. On the cross-section of the light-emitting device, the cross-sectional profiles of the portions of the support portion and the blocking portion located between two adjacent sub-pixels are both trapezoidal. The edge of the second end portion is the edge of the blocking portion facing the substrate, and the edge of the first end portion is the edge of the support portion facing the substrate.

58. The display panel according to any one of claims 55 to 57, characterized in that, It also includes at least one optical functional layer, wherein the optical functional layer is located on the side of the light-emitting functional layer away from the substrate, and includes a plurality of optical functional units located within the first opening, wherein the thickness of at least a portion of the film layer of the optical functional units gradually decreases at its edge. For each pair of adjacent first electrodes, the pixel pitch between the edges of the portions of the first electrodes that are in contact with the light-emitting functional layer in the same light-emitting device is 2074-18000 nanometers, and the pixel density of the display panel is 90-5000 PPI.

59. The display panel according to any one of claims 55 to 57, characterized in that, It includes multiple pixels, and each pixel includes multiple sub-pixels that emit light of different wavelengths. The multiple sub-pixels of the multiple pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel. The first sub-pixel, the second sub-pixel, and the third sub-pixel each include different light-emitting devices.

60. The display panel according to claim 59, characterized in that, The ratio of the number of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 1:1:

1.

61. The display panel according to claim 60, characterized in that, Each pixel is arranged in a first pixel arrangement, with the first sub-pixel, the second sub-pixel, and the third sub-pixel side by side; or, each pixel is arranged in a second pixel arrangement, with the second sub-pixel and the third sub-pixel arranged in a column / row and side by side with the first sub-pixel.

62. The display panel according to claim 59, characterized in that, The display panel has a pixel density of 90-5200 PPI.

63. The display panel according to claim 62, characterized in that, The pixel pitch is 2000-2200 nanometers, and the pixel density of the display panel is 117-5200 PPI; or The pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 117-4792 PPI; or The pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 115-4305 PPI; or The pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 115-3479 PPI; or The pixel pitch is 4000-6000 nanometers, and the pixel density of the display panel is 111-2854 PPI; or The pixel pitch is 6000-9000 nanometers, and the pixel density of the display panel is 107-1969 PPI; or The pixel pitch is 9000-13000 nanometers, and the pixel density of the display panel is 102-1344 PPI; or The pixel pitch is 13,000-18,000 nanometers, and the pixel density of the display panel is 90-944 PPI.

64. The display panel according to claim 62, characterized in that, The sub-pixels in the pixel are arranged in the first pixel arrangement, and the pixel density of the display panel is 170-3456 PPI.

65. The display panel according to claim 64, characterized in that, The pixel pitch is 2000-2200 nanometers, and the pixel density of the display panel is 2545-3456 PPI; or The pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 2171-3143 PPI; or The pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 1577-2765 PPI; or The pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 1063-2160 PPI; or The pixel pitch is 4000-6000 nanometers, and the pixel density of the display panel is 529-1728 PPI; or The pixel pitch is 6000-9000 nanometers, and the pixel density of the display panel is 353-1152 PPI; or The pixel pitch is 9000-13000 nanometers, and the pixel density of the display panel is 244-768 PPI; or The pixel pitch is 13,000-18,000 nanometers, and the pixel density of the display panel is 170-531 PPI.

66. The display panel according to claim 62, characterized in that, The sub-pixels in the pixel are arranged in a second pixel arrangement, and the pixel density of the display panel is 260-5200 PPI.

67. The display panel according to claim 66, characterized in that, The pixel pitch is 2000-2200 nanometers, and the pixel density of the display panel is 3818-5200 PPI; or The pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 3256-4714 PPI; or The pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 2366-4147 PPI; or The pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 1594-3240 PPI; or The pixel pitch is 4000-6000 nanometers, and the pixel density of the display panel is 794-2592 PPI; or The pixel pitch is 6000-9000 nanometers, and the pixel density of the display panel is 529-1728 PPI; or The pixel pitch is 9000-13000 nanometers, and the pixel density of the display panel is 366-1152 PPI; or The pixel pitch is 13,000-18,000 nanometers, and the pixel density of the display panel is 260-797 PPI.

68. The display panel according to claim 62, characterized in that, It also includes a pixel defining layer, which is located on the first electrode and on the side of the partition portion facing the substrate and defines a second opening. The pixel defining layer covers the edge of the first electrode, the second opening exposes the first electrode, the edge of the second opening coincides with the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device, the distance between the orthographic projection of the edge of the second end on the substrate and the orthographic projection of the edge of the first end on the substrate is a first width, the distance between the orthographic projection of the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device and the edge of the second end on the substrate is a first spacing, the sub-pixels in the pixel are arranged in a first pixel arrangement, and the pixel density of the display panel is 170-3143 PPI.

69. The display panel according to claim 68, characterized in that, The pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 2171-3143 PPI; or The pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 1577-2765 PPI; or The pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 1063-2160 PPI; or The pixel pitch is 4000-6000 nanometers, and the pixel density of the display panel is 529-1728 PPI; or The pixel pitch is 6000-9000 nanometers, and the pixel density of the display panel is 353-1152 PPI; or The pixel pitch is 9000-13000 nanometers, and the pixel density of the display panel is 244-768 PPI; or The pixel pitch is 13,000-18,000 nanometers, and the pixel density of the display panel is 170-531 PPI.

70. The display panel according to claim 62, characterized in that, It also includes a pixel defining layer, which is located on the first electrode and on the side of the partition portion facing the substrate and defines a second opening. The pixel defining layer covers the edge of the first electrode, the second opening exposes the first electrode, the edge of the second opening coincides with the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device, the distance between the orthographic projection of the edge of the second end on the substrate and the orthographic projection of the edge of the first end on the substrate is a first width, the distance between the orthographic projection of the edge of the portion of the first electrode that contacts the light-emitting functional layer in the same light-emitting device and the edge of the second end on the substrate is a first spacing, the sub-pixels in the pixel are arranged in a second pixel arrangement, and the pixel density of the display panel is 260-4714 PPI.

71. The display panel according to claim 70, characterized in that, The pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 3256-4714 PPI; or The pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 2366-4147 PPI; or The pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 1594-3240 PPI; or The pixel pitch is 4000-6000 nanometers, and the pixel density of the display panel is 794-2592 PPI; or The pixel pitch is 6000-9000 nanometers, and the pixel density of the display panel is 529-1728 PPI; or The pixel pitch is 9000-13000 nanometers, and the pixel density of the display panel is 366-1152 PPI; or The pixel pitch is 13,000-18,000 nanometers, and the pixel density of the display panel is 260-797 PPI.

72. The display panel according to claim 59, characterized in that, The pixel pitch is 2000-2200 nanometers, and the average of the widths of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 450-1326 nanometers; or The pixel pitch is 2200-2500 nanometers, and the average of the widths of the first sub-pixel, the second sub-pixel, and the third sub-pixel is 494-1700 nanometers; or The pixel pitch is 2500-3200 nanometers, and the average value of the width of the first sub-pixel, the width of the second sub-pixel, and the width of the third sub-pixel is 563-2868 nanometers; or The pixel pitch is 3200-4000 nanometers, and the average value of the width of the first sub-pixel, the width of the second sub-pixel, and the width of the third sub-pixel is 720-4767 nanometers; or The pixel pitch is 4000-6000 nanometers, and the average value of the width of the first sub-pixel, the width of the second sub-pixel, and the width of the third sub-pixel is 900-11995 nanometers; or The pixel pitch is 6000-9000 nanometers, and the average value of the width of the first sub-pixel, the width of the second sub-pixel, and the width of the third sub-pixel is 1350-18008 nanometers. or The pixel pitch is 9000-13000 nanometers, and the average value of the width of the first sub-pixel, the width of the second sub-pixel, and the width of the third sub-pixel is 2025-25699 nanometers; or The pixel pitch is 13000-18000 nanometers, and the average value of the width of the first sub-pixel, the width of the second sub-pixel, and the width of the third sub-pixel is 4050-35846 nanometers.

73. The display panel according to claim 59, characterized in that, The opening ratio is 6-60%.

74. The display panel according to claim 59, characterized in that, The display panel comprises multiple pixels, each of which includes a first sub-pixel, a second sub-pixel, and a third sub-pixel whose wavelengths of emitted light decrease sequentially. The first, second, and third sub-pixels each include different light-emitting devices and are arranged in multiple rows and columns. The first and third sub-pixels are arranged in the same row and column, but in different rows and columns from the second sub-pixel. In the rows and columns containing the first and third sub-pixels, the first and third sub-pixels are arranged alternately. Rows containing the first sub-pixels and rows containing the second sub-pixels alternate, as do columns containing the first and second sub-pixels. Each second sub-pixel is surrounded by two first sub-pixels and two third sub-pixels. The quadrilateral formed by connecting the centroids of the two first and two third sub-pixels surrounding the same second sub-pixel has at least two parallel opposite sides. The pixel density of the display panel is 200-7400 PPI.

75. The display panel according to claim 74, characterized in that, The pixel pitch is 2000-2200 nanometers, and the pixel density of the display panel is 249-7400 PPI; or The pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 248-6778 PPI; or The pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 245-6088 PPI; or The pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 243-4921 PPI; or The pixel pitch is 4000-6000 nanometers, and the pixel density of the display panel is 236-4036 PPI; or The pixel pitch is 6000-9000 nanometers, and the pixel density of the display panel is 227-2785 PPI; or The pixel pitch is 9000-13000 nanometers, and the pixel density of the display panel is 216-1901 PPI; or The pixel pitch is 13000-16500 nanometers, and the pixel density of the display panel is 208-1335 PPI; or The pixel pitch is 16,500-18,000 nanometers, and the pixel density of the display panel is 200-1060 PPI.

76. The display panel according to claim 74, characterized in that, The centroid of the surrounded second sub-pixel is offset from the intersection of the two diagonals of the corresponding quadrilateral, or the centroid of the surrounded second sub-pixel coincides with the intersection of the two diagonals of the quadrilateral.

77. The display panel according to claim 76, characterized in that, The pixel pitch is 2000-2200 nanometers, and the pixel density of the display panel is 1600-3000 PPI; or The pixel pitch is 2200-2500 nanometers, and the pixel density of the display panel is 1400-2700 PPI; or The pixel pitch is 2500-3200 nanometers, and the pixel density of the display panel is 1200-2400 PPI; or The pixel pitch is 3200-4000 nanometers, and the pixel density of the display panel is 1000-2100 PPI; or The pixel pitch is 4000-6000 nanometers, and the pixel density of the display panel is 800-1800 PPI; or The pixel pitch is 6000-9000 nanometers, and the pixel density of the display panel is 600-1500 PPI; or The pixel pitch is 9000-13000 nanometers, and the pixel density of the display panel is 400-1200 PPI; or The pixel pitch is 13000-16500 nanometers, and the pixel density of the display panel is 300-900 PPI; or The pixel pitch is 16,500-18,000 nanometers, and the pixel density of the display panel is 200-800 PPI.

78. The display panel according to any one of claims 55 to 57, characterized in that, It also includes at least one optical functional layer, wherein the optical functional layer is located on the side of the light-emitting functional layer away from the substrate, and includes a plurality of optical functional units located within the first opening, wherein the thickness of at least a portion of the film layer of the optical functional units gradually decreases at its edge. For each pair of adjacent first electrodes, the pixel pitch between the edges of the portions of the first electrodes that are in contact with the light-emitting functional layer in the same light-emitting device is 2274-18000 nanometers, and the pixel density of the display panel is 90-4560 PPI.

79. A display device, characterized in that, Includes the display panel described in any one of claims 1 to 78.

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