Display panel and display device

Abstract

The invention relates to the technical field of display, and particularly provides a display panel and a display device.The display panel comprises a substrate, an isolation structure, a pixel definition layer and a light-emitting functional layer, and the isolation structure is located on the substrate and comprises a supporting part and a crown part located on the side, back to the substrate, of the supporting part; an isolation opening penetrating through the supporting part and the crown part is formed in the isolation structure; the pixel definition layer is located between the substrate and the isolation structure, the pixel definition layer is provided with a pixel opening, and the orthographic projection of the pixel opening on the substrate is located in the orthographic projection range of the isolation opening on the substrate; the light-emitting functional layer partially covers the surface of the side, back to the substrate, of the pixel definition layer and forms a thinning area, and at least part of the orthographic projection of the thinning area on the substrate surrounds the orthographic projection of the pixel opening on the substrate; wherein the distance between the orthographic projection, close to the isolation opening, of the edge of the crown part on the substrate and the orthographic projection, on the substrate, of the edge of the pixel opening is a first length, and the distance between the orthographic projection, on the substrate, of the edge of the crown part on the substrate and the orthographic projection, on the substrate, of the edge of the side, close to the pixel opening, of the thinning area is a second length, the first length is not less than the second length.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and more specifically, relates to a display panel and a display device. Background Art

[0002] Organic Light Emitting Diode (OLED) display panel is a display device that uses the self-luminous principle of organic light-emitting materials to achieve display; it has the advantages of fast response speed, high brightness, and full viewing angle, making it a very competitive type of display panel with good development prospects.

[0003] Current electronic display products are limited by their own structural design and face the need to further improve display effects. Summary of the invention

[0004] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0005] To this end, embodiments of the present application provide a display panel and a display device to improve the display effect of the display panel.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in the present application is as follows: a display panel is provided, comprising a substrate, an isolation structure, a pixel definition layer and a light-emitting functional layer, wherein the isolation structure is located on the substrate, the isolation structure comprises a support portion and a crown portion, and the crown portion is located on the side of the support portion facing away from the substrate; an isolation opening is provided on the isolation structure, and the isolation opening is surrounded by the support portion and the crown portion; the pixel definition layer is located between the substrate and the isolation structure, the pixel definition layer is provided with a pixel opening, and the orthographic projection of the pixel opening on the substrate is located within the orthographic projection range of the isolation opening on the substrate; the light-emitting functional layer covers the pixel opening and at least partially covers the surface of the pixel definition layer on the side facing away from the substrate, the light-emitting functional layer comprises a thinning area, the thinning area is located on the side of the pixel definition layer facing away from the substrate, and the orthographic projection of the thinning area on the substrate is at least partially arranged around the orthographic projection of the pixel opening on the substrate;

[0007] Among them, the distance between the orthographic projection of the edge of the crown near the isolation opening on the substrate and the orthographic projection of the edge of the pixel opening on the substrate is a first length, and the distance between the orthographic projection of the edge of the crown near the isolation opening on the substrate and the orthographic projection of the edge of the thinning area on one side near the pixel opening on the substrate is a second length, and the first length is not less than the second length.

[0008] Optionally, the display panel also includes an encapsulation layer, which includes a first covering portion and a connecting portion, wherein the first covering portion is located on a side of the isolation structure facing away from the substrate, and is in contact with an edge of the crown portion close to the isolation opening through the connecting portion, and at least a portion of the connecting portion protrudes toward the isolation opening relative to the crown portion.

[0009] Optionally, the encapsulation layer further includes a second covering portion, and the second covering portion at least covers the light-emitting functional layer;

[0010] Optionally, the second covering portion also covers at least a portion of the peripheral side of the supporting portion close to the isolation opening;

[0011] Optionally, the second covering portion also covers at least a portion of a surface of the crown portion on a side close to the base.

[0012] Optionally, the orthographic projection of the connecting portion on the substrate at least partially overlaps with the orthographic projection of the thinning area on the substrate, and the orthographic projection of an edge of the thinning area close to the pixel opening on the substrate is outside the orthographic projection range of the connecting portion on the substrate.

[0013] Optionally, an orthographic projection of the connecting portion on the substrate is located within an orthographic projection of the thinned region on the substrate.

[0014] Optionally, the thickness of the first covering portion is a first thickness, and the second length is not less than half of the first thickness.

[0015] Optionally, the second length is not greater than the first thickness.

[0016] Optionally, the relationship between the first length and the second length satisfies L1≥max[X*H1, L2], where L1 is the first length, L2 is the second length, H1 is the first thickness, X is the thickness coefficient, and the value range of the thickness coefficient X is 0.5 to 1.0.

[0017] Optionally, the first thickness is 0.6 μm-2.0 μm.

[0018] Optionally, the thickness of the isolation structure is a second thickness, and the second length is positively correlated with the second thickness.

[0019] Optionally, a ratio of the second length to the second thickness ranges from 0.577 to 2.246.

[0020] Optionally, the ratio of the second length to the second thickness does not exceed the tangent value of the evaporation angle of the light-emitting functional layer.

[0021] Optionally, the ratio of the second length to the second thickness is the tangent value of the evaporation angle of the light-emitting functional layer.

[0022] Optionally, the second thickness is 0.45 μm to 1.5 μm.

[0023] Optionally, the second thickness is 0.8 μm.

[0024] Optionally, the orthographic projection of the thinned area on the substrate partially coincides with the orthographic projection of the crown portion close to the isolation opening on the substrate;

[0025] An orthographic projection of the thinned area on the substrate is spaced apart from an orthographic projection of the support portion close to the isolation opening on the substrate.

[0026] Optionally, the light-emitting functional layer further includes a flat area, the flat area is located on a side of the pixel definition layer facing away from the substrate, the flat area is connected to the thinned area and the flat area is located on a side of the thinned area facing the pixel opening.

[0027] Optionally, the orthographic projection of the support portion on the base is located within the orthographic projection of the crown portion on the base.

[0028] Optionally, the support portion includes at least two superimposed sub-support portions, and an orthographic projection of the sub-support portion farther from the substrate on the substrate is located within a range of an orthographic projection of the sub-support portion closer to the substrate on the substrate.

[0029] Optionally, the orthographic projection of the sub-support portion close to the substrate on the substrate is located within the orthographic projection range of the crown portion on the substrate. Optionally, the side of the support portion close to the isolation opening facing the substrate is a first end surface, and the distance between the orthographic projection of the edge of the first end surface on the substrate and the orthographic projection of the edge of the crown portion close to the isolation opening on the substrate is a third length, and the third length is not greater than 0.8 μm.

[0030] Optionally, the third length ranges from 0.3 μm to 0.8 μm.

[0031] Optionally, in a cross-sectional direction perpendicular to the substrate, the flat region within the isolation opening includes a first flat region and a second flat region that are arranged opposite to each other, the first flat region and the second flat region are respectively located on both sides of the pixel opening, and the length of the first flat region is greater than the length of the second flat region;

[0032] The sidewall of the isolation structure arranged corresponding to the first flat area is a first sidewall, the sidewall of the isolation structure arranged corresponding to the second flat area is a second sidewall, and the third length corresponding to the first sidewall is greater than the third length corresponding to the second sidewall.

[0033] Optionally, the light-emitting functional layer comprises a first light-emitting functional layer, a second light-emitting functional layer and a third light-emitting functional layer having different light-emitting colors, the wavelength of light emitted by the first light-emitting functional layer is smaller than the wavelength of light emitted by the second light-emitting functional layer, and the wavelength of light emitted by the second light-emitting functional layer is smaller than the wavelength of light emitted by the third light-emitting functional layer;

[0034] Wherein, any one of the first light-emitting functional layer, the second light-emitting functional layer and the third light-emitting functional layer is disposed in the isolation opening.

[0035] Optionally, a distance between an orthographic projection of the edge of the first end surface on the substrate and an orthographic projection of the edge of the pixel opening on the substrate is a fourth length, and the fourth length is the sum of the first length and the third length;

[0036] The fourth length in the isolation opening having the first light-emitting functional layer is smaller than the fourth length in the isolation opening having the second light-emitting functional layer;

[0037] The fourth length in the isolation opening having the second light-emitting functional layer is smaller than the fourth length in the isolation opening having the third light-emitting functional layer.

[0038] The present application also provides a display device, which includes any of the display panels described above.

[0039] In the embodiment provided in the present application, the display device has the above-mentioned display panel, and thus has at least the advantages of the above-mentioned display panel. The specific effects are described above and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0041] Figure 1 A schematic plan view of a display panel provided in an embodiment of the present application;

[0042] Figure 2A schematic diagram of a first cross-sectional structure of area A in a display panel provided in an embodiment of the present application;

[0043] Figure 3 A schematic diagram of a second cross-sectional structure of area A in a display panel provided in an embodiment of the present application;

[0044] Figure 4 A schematic diagram of a third cross-sectional structure of region A in a display panel provided in an embodiment of the present application;

[0045] Figure 5 for Figure 4 A magnified view of the structure in the middle B area;

[0046] Figure 6 A schematic diagram of the evaporation direction of a display panel provided in an embodiment of the present application;

[0047] Figure 7 for Figure 6 Schematic diagram of evaporation in the straight edge Scan direction;

[0048] Figure 8 for Figure 6 Schematic diagram of evaporation in the nozzle direction;

[0049] Fig. 9 A simplified structural diagram of a display device provided in an embodiment of the present application.

[0050] Among them, the reference numerals in the figure are:

[0051] 1. Substrate; 2. Isolation structure; 201. Isolation opening; 202. First side wall; 203. Second side wall; 21. Support portion; 211. First end face; 22. Crown; 3. Pixel definition layer; 301. Pixel opening; 4. Light-emitting functional layer; 41. Thinning area; 42. Flat area; 421. First flat area; 422. Second flat area; 5. Encapsulation layer; 51. First covering portion; 52. Connecting portion; 53. Second covering portion; 10. Display panel; 100. Display device. DETAILED DESCRIPTION

[0052] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0053] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0054] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0055] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0056] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0059] An isolation structure is provided in the display panel, and the isolation structure can be used to isolate some functional film layers in adjacent light-emitting units (also referred to as light-emitting devices), ensuring that adjacent light-emitting units do not interfere with each other, which helps to improve the display effect of the display panel. However, at the same time, the above-mentioned isolation structure will also affect the light-emitting performance of the light-emitting unit. In the process of realizing the present application, the inventors found that there are the following problems in the related technology: when the size of the light-emitting unit isolated by the isolation structure is too small, the light-emitting effect of the light-emitting unit is poor; but if the size of the light-emitting unit isolated by the isolation structure is too large, it will affect the display accuracy and display effect of the display panel, resulting in poor final display quality.

[0060] Based on this, the embodiment of the present application provides a display panel 10, including a substrate 1, an isolation structure 2, a pixel definition layer 3 and a light-emitting functional layer 4, the isolation structure 2 is located on the substrate 1, the isolation structure 2 includes a support portion 21 and a crown portion 22, the crown portion 22 is located on the side of the support portion 21 facing away from the substrate 1; an isolation opening 201 is opened on the isolation structure 2, and the isolation opening 201 is surrounded by the support portion 21 and the crown portion 22; the pixel definition layer 3 is located between the substrate 1 and the isolation structure 2, and the pixel definition layer 3 is opened at a position opposite to the isolation opening 201. A pixel opening 301, wherein the orthographic projection of the pixel opening 301 on the substrate 1 is located within the orthographic projection range of the isolation opening 201 on the substrate 1, and the isolation opening 201 is connected to the pixel opening 301; the light-emitting function layer 4 covers the pixel opening 301, and at least partially covers the side of the pixel definition layer 3 facing away from the substrate 1, the light-emitting function layer 4 includes a thinning area 41, the thinning area 41 is located on the side of the pixel definition layer 3 facing away from the substrate 1, and the orthographic projection of the thinning area 41 on the substrate 1 is at least partially arranged around the orthographic projection of the pixel opening 301 on the substrate 1;

[0061] Among them, the distance between the orthographic projection of the edge of the crown 22 close to the isolation opening 201 on the substrate 1 and the orthographic projection of the edge of the pixel opening 301 on the substrate 1 is a first length, and the distance between the orthographic projection of the edge of the crown 22 close to the isolation opening 201 on the substrate 1 and the orthographic projection of the edge of the thinning area 41 on one side close to the pixel opening 301 on the substrate 1 is a second length, and the first length is not less than the second length.

[0062] In the embodiment provided in the present application, the display panel 10 can adjust the first length defined by the isolation structure 2 and the pixel opening 301 to be not less than the second length defined by the light-emitting functional layer 4 and the isolation structure 2, so that a sufficiently large spacing can be defined between the isolation opening 201 and the pixel opening 301 for filling the film layer and the film layer can remain relatively flat, such as the light-emitting functional layer 4. After the film layer filled in the isolation opening 201 can maintain a certain flatness, the display effect of the display panel 10 can be improved to a certain extent, so that it can present a better display quality.

[0063] The pixel definition layer 3 can define the exposed area of ​​another light-emitting functional structure used to cooperate with the light-emitting functional layer 4 through the pixel opening 301 opened thereon. Generally speaking, the other light-emitting functional structure is located between the pixel definition layer 3 and the substrate 1, and is partially exposed relative to the pixel opening 301. The pixel opening 301 can cooperate with the light-emitting functional layer 4, another light-emitting functional structure and the corresponding light-emitting functional layer to define the size of the light-emitting area of ​​the light-emitting unit and the boundary of the light-emitting range. In the light-emitting area, if there is a situation where the film thickness is uneven, it will cause uneven light extraction efficiency of the light-emitting area, affecting the final display effect.

[0064] It should be noted that the light-emitting functional layer 4 may include at least one of a hole injection layer, a hole transport layer, an electron blocking layer, an organic light-emitting material layer, an electron injection layer, an electron transport layer and a hole blocking layer.

[0065] The above-mentioned display panel 10 may also include an electrode layer, which at least partially covers the light-emitting functional layer 4, and the electrode layer is stacked on the substrate 1 with at least one of the hole injection layer, the hole transport layer, the electron blocking layer, the organic light-emitting material layer, the electron injection layer, the electron transport layer and the hole blocking layer, and the electrode layer includes any one of a cathode and an anode.

[0066] Optionally, a hole injection layer, a hole transport layer, an electron blocking layer, an organic light-emitting material layer, a hole blocking layer, an electron transport layer, an electron injection layer, and a cathode are sequentially stacked on a substrate 1, and the electrode layer is electrically connected to the isolation structure 2, and the electrode layer overlaps at least part of the isolation structure.

[0067] It should be noted that in the embodiments of the present application, while ensuring that the overall structure of the isolation structure 2 is wide at the top and narrow at the bottom, the specific shape of the isolation structure 2 is not limited.

[0068] The composition, preparation, etc. of the isolation structure 2 are disclosed in patents CN118251982A, patent 202410864269.8, patent PCT / CN2024 / 098407, patent PCT / CN2024 / 102783, patent PCT / CN2024 / 098217, patent PCT / CN2024 / 099419, patent PCT / CN2024 / 099072, CN1 The present invention is further described in CN17979755A, CN117998900A, CN117062489A, CN117580403A, CN116583155A, CN116669477A, ​​CN117396039A, CN116669480A, CN116600606A, and CN117500332A, the contents of which are incorporated herein by reference for reference.

[0069] Below, some configuration methods of the isolation structure 2 are briefly described through embodiments.

[0070] See also Figure 1-Figure 2 , the orthographic projection of the pixel opening 301 on the substrate 1 is within the orthographic projection range of the isolation opening 201 on the substrate 1; the crown portion 22 of the isolation structure 2 has a side wall in the circumferential direction, and the plane where the side wall is located can be perpendicular to the plane where the substrate 1 is located, or there can be a certain angle. The side wall can be matched with the pixel opening 301 to define the above-mentioned first length, and can also be matched with the thinning area 41 to define the above-mentioned second length.

[0071] In order to facilitate the description and definition of the above-mentioned dimensions, along the extension direction of the substrate 1, the end of the support portion 21 close to or pointing to the isolation opening 201 is denoted as P0, the end of the thinning region 41 close to or pointing to the isolation structure 2 is denoted as P1, the end of the crown portion 22 close to or pointing to the isolation opening 201 is denoted as P2, the end of the thinning region 41 close to or pointing to the pixel opening 301 is denoted as P3, and the end of the pixel opening 301 close to or pointing to the isolation structure 2 is denoted as P4.

[0072] See also Figure 2, define the first length as L1, L1 is defined by P2 and P4; the second length is L2, L2 is defined by P2 and P3. Since the first length L1 is not less than the second length L2, it can be ensured that the distance between the end of the isolation structure 2 facing the substrate 1 and the pixel opening 301 is sufficient to accommodate the light-emitting functional layer 4 of a certain size, so that the part of the film layer of the light-emitting functional layer 4 located in the pixel opening 301 can remain relatively flat, so that it can be powered normally, which helps to improve the working condition of the relevant light-emitting unit and help improve the display effect of the display panel 10.

[0073] The light-emitting functional layer 4 can be covered on the side of the pixel definition layer 3 facing away from the substrate 1 through the pixel opening 301 by evaporation or other methods. Affected by the evaporation angle and evaporation direction, during the evaporation process, the thickness of the part of the film layer located in the edge area will be uneven due to factors such as the relative position between the evaporation source and the corresponding substrate, forming a thinning area 41 with a gradually inclined surface. In other words, the surface of the thinning area 41 facing away from the pixel definition layer 3 is an inclined surface, and the end of the inclined surface pointing to the isolation structure 2 is inclined toward the direction close to the pixel definition layer 3. Please refer to Figure 2 The closer the film layer of the light-emitting functional layer 4 in the thinning area 41 is to the isolation structure 2 , the thinner the thickness thereof is.

[0074] If the first length L1 is smaller than the second length L2, the thinned area 41 will only partially cover the pixel definition layer 3, and the rest will fall into the pixel opening 301, resulting in poor flatness of the film layer in the pixel opening 301. At this time, the light-emitting functional layer 4 with poor flatness will lead to uneven electric field distribution, which will directly affect the luminous efficiency of the light-emitting unit. The uneven light-emitting functional layer 4 makes the electric field intensity in different areas different, resulting in inconsistent luminous intensity of the light-emitting unit, and ultimately manifests itself as uneven brightness of the picture displayed by the display panel 10. In addition, color cast, reduced viewing angle, etc. may also occur, seriously affecting the quality and appearance of the image.

[0075] Therefore, by limiting the size between the first length L1 and the second length L2, the display effect of the display panel 10 can be effectively improved and the display quality thereof can be enhanced.

[0076] On the premise that the size and shape of the isolation structure 2 in the display panel 10 remain unchanged, the greater the length of L1 , the better the flatness of the light-emitting functional layer 4 .

[0077] In some embodiments, the light-emitting functional layer 4 further includes a flat region 42, which is located on the side of the pixel definition layer 3 facing away from the substrate 1, and the flat region 42 is connected to the thinned region 41 and is located on the side of the thinned region 41 facing the pixel opening 301, see Figure 2In addition to the above-mentioned flat area 42 , the light-emitting functional layer 4 also includes a portion of a film layer located within the pixel opening 301 .

[0078] The flat area 42 is located on the side of the pixel definition layer 3 facing away from the substrate 1. The thickness of the film layer at different positions in the flat area 42 is relatively uniform and the surface is relatively flat. The thinning area 41 and the part of the light-emitting functional layer 4 located in the pixel opening 301 are connected through the flat area 42, which helps to improve the flatness of the light-emitting functional layer 4 located at the pixel opening 301, so that the light-emitting functional layer 4 located in the pixel opening 301 can basically keep the film flat, so as to better contact with the film layers such as the electrode layer, and the film layer adjacent to the light-emitting functional layer 4 can realize the effective transfer of charges to the light-emitting functional layer 4, which helps to improve the use efficiency of the charges, so that the part of the light-emitting functional layer 4 located in the pixel opening 301 has better light uniformity and light brightness when it is powered on, thereby improving the display quality of the display panel 10.

[0079] Taking into account that the light-emitting functional layer 4 does not need to be connected to the isolation structure 2, in order to avoid leakage of the corresponding film layer (for example, the HIL layer, the hole injection layer), in some embodiments, the orthographic projection of the above-mentioned thinning area 41 on the substrate 1 is arranged to partially overlap with the orthographic projection of the crown portion 22 on the substrate 1 near the isolation opening 201, and there is a gap between the orthographic projection of the thinning area 41 on the substrate 1 and the orthographic projection of the support portion 21 on the substrate 1 near the isolation opening 201.

[0080] The above-mentioned interval can ensure that the thinned area 41 does not directly contact the isolation structure 2 , thereby preventing the isolation structure 2 from interfering with the current transmission in the light-emitting functional layer 4 and preventing the light-emitting functional layer 4 from having lateral leakage defects.

[0081] See also Figure 2 The cross-sectional structures of the support portion 21 and the crown portion 22 in the thickness direction are both trapezoidal, wherein the thickness of the support portion 21 is greater than the thickness of the crown portion 22, and the minimum width of the crown portion 22 in the transverse direction is greater than the maximum width of the support portion 21 in the transverse direction, so the orthographic projection of the support portion 21 on the substrate 1 is within the range of the orthographic projection of the crown portion 22 on the substrate 1. The orthographic projection of the thinned area 41 on the substrate 1 can be located partially within the area where the orthographic projection of the crown portion 22 on the substrate 1 does not overlap with the orthographic projection of the support portion 21 on the substrate 1.

[0082] This structural design can effectively prevent the light-emitting functional layer 4 from contacting the isolation structure 2 .

[0083] The cross-sectional structure of the isolation structure 2 formed by the support portion 21 and the crown portion 22 is T-shaped. In some embodiments, the support portion 21 is a multi-layer structure. For example, the support portion 21 may include at least two stacked sub-support portions.

[0084] In some embodiments, the orthographic projection of the sub-support portion close to the substrate on the substrate is located within the orthographic projection range of the crown portion on the substrate; the orthographic projection of the sub-support portion far from the substrate 1 on the substrate 1 is located within the orthographic projection range of the sub-support portion close to the substrate 1 on the substrate 1. At this time, the cross-sectional structure of the isolation structure 2 is an inverted trapezoid or a structure similar to an inverted trapezoid.

[0085] Specifically, the side of the support portion 21 close to the isolation opening 201 facing the substrate 1 is the first end surface 211, and the distance between the orthographic projection of the edge of the first end surface 211 on the substrate 1 and the orthographic projection of the edge of the crown portion 22 close to the isolation opening 201 on the substrate 1 is the third length L3. Let the end of the first end surface 211 close to or pointing to the isolation opening 201 be P0, and the third length L3 is defined by the above P0 and P2.

[0086] The third length L3 is used to prevent the light-emitting functional layer 4 from contacting or overlapping the sidewall of the isolation structure 2 .

[0087] L3 can be used to control the evaporation range of the relevant film layers in conjunction with the adjustment of the evaporation angle while the light-emitting functional layer 4 and other subsequent film layers are being evaporated, so as to ensure that the different film layers finally obtained by evaporation can overlap with the side wall of the isolation structure 2 or keep a distance from the side wall of the isolation structure 2 according to the design requirements. In other words, the above L3 is used to adjust the distribution range of the film layers prepared by various different evaporation processes.

[0088] The light-emitting functional layer 4 needs to maintain a certain distance from the corresponding side wall or the surrounding area of ​​the isolation structure 2 to avoid overlapping, so the third length L3 needs to be adjusted to have an appropriate size: when other conductive film layers connected to the light-emitting functional layer 4 need to overlap with the corresponding side wall or the surrounding area of ​​the isolation structure 2, the corresponding length L3 can be adjusted as needed to ensure the overlapping effect; when other conductive film layers connected to the light-emitting functional layer 4 (for example, the electrode layer covering the light-emitting functional layer 4, which can be a cathode layer or an anode layer) do not need to overlap with the corresponding side wall or the surrounding area of ​​the isolation structure 2 due to design requirements, the corresponding length L3 can be appropriately reduced to help reduce the size of the isolation structure 2. By adjusting the size of the third length L3, the design width of the pixel gap is improved, which helps to increase the pixel density and enhance the display effect of the display panel 10.

[0089] Specifically, the third length L3 is not greater than 0.8 μm.

[0090] Furthermore, the value range of the third length L3 is 0.3 μm-0.8 μm, and the third length L3 can be set to be adaptively adjusted within the range, for example, 0.3 μm, 0.4 μm, 0.5 μm, 0.6 μm, 0.7 μm, 0.8 μm.

[0091] In some embodiments, the two opposite sides of the light-emitting functional layer 4 in the circumferential direction do not need to overlap with the corresponding side walls of the isolation structure 2 or the surrounding area thereof, but in order to obtain a better light-emitting effect and avoid color mixing of a certain light-emitting functional layer, both ends of the light-emitting functional layer 4 in the circumferential direction are generally arranged to extend above the pixel definition layer 3. At the same time, the above structure also facilitates the normal overlap of other conductive film layers (such as electrode layers, which are not shown in the figure) located on the side of the light-emitting functional layer 4 facing away from the substrate 1 and the side walls of the isolation structure 2.

[0092] In some embodiments, taking the electrode layer as an example, both ends of the electrode layer need to overlap with the isolation structure 2; in other embodiments, only one end of the electrode layer may overlap with the isolation structure 2. At this time, the distribution range of the light-emitting functional layer 4 in the isolation opening may be adjusted as needed.

[0093] See also Figure 3 , the flat area 42 is an annular structure and is arranged in a one-to-one correspondence in the corresponding isolation opening 201. In the cross-sectional direction perpendicular to the substrate 1, the flat area 42 in the isolation opening 201 includes a first flat area 421 and a second flat area 422 arranged opposite to each other. The first flat area 421 and the second flat area 422 are respectively located on both sides of the pixel opening 301, and the length of the first flat area 421 is greater than the length of the second flat area 422. On the isolation structure 2, the side wall arranged corresponding to the first flat area 421 is the first side wall 202, and the side wall arranged corresponding to the second flat area 422 is the second side wall 203, and the third length L3 corresponding to the first side wall 202 is greater than the third length L3 corresponding to the second side wall 203.

[0094] The electrode layer located above the second flat area 422 of the above-mentioned light-emitting functional layer 4 does not need to overlap with the side wall of the isolation structure 2. Therefore, under the premise of ensuring that the light-emitting functional layer 4 does not overlap with the side wall of the isolation structure 2, the corresponding area of ​​the isolation structure 2 can be minimized to a certain extent by shortening the third length L3 corresponding to the part of the film layer, thereby maximizing the distance between the two adjacent isolation openings 201, and under the premise of not affecting the independent light emission of the two adjacent light-emitting units, and not causing current crosstalk, leakage and other faults, the arrangement density of the above-mentioned light-emitting units can be improved, and the arrangement density of the light-emitting units is maximized, so as to improve the display picture quality of the display panel 10 and improve the display effect.

[0095] Specifically, the shape and extension of the light-emitting functional layer 4 in different isolation openings 201 can be adjusted according to actual needs, and this embodiment and other similar embodiments do not limit this.

[0096] See also Figure 4-Figure 5The display panel 10 further includes an encapsulation layer 5 , and the encapsulation layer 5 is used to encapsulate the light-emitting units located in the corresponding isolation openings 201 .

[0097] The encapsulation layer 5 may be a thin film structure prepared by chemical vapor deposition (CVD) technology.

[0098] Specifically, the encapsulation layer 5 includes a first covering portion 51 and a connecting portion 52, wherein the first covering portion 51 is located on the side of the isolation structure 2 facing away from the substrate 1, and contacts the edge of the crown portion 22 close to the isolation opening 201 through the connecting portion 52. At least a portion of the connecting portion 52 protrudes relative to the crown portion 22 toward the isolation opening 201.

[0099] The connecting portion 52 contacts and is connected to the crown 22 through the side wall of one end of the crown 22 pointing to the isolation opening 201. At this time, at least part of the structure of the connecting portion 52 can protrude relative to the crown 22 toward the isolation opening 201 and block part of the light-emitting functional layer 4 located therebelow; accordingly, the first covering portion 51 is located through the connecting portion 52 on the side of the crown 22 facing away from the substrate 1, that is, above the crown 22, and a certain gap is maintained between the first covering portion 51 and the surface of the crown 22 facing away from the substrate 1.

[0100] The above-mentioned connecting portion 52 will block the light emitted by the light-emitting unit located therebelow. In order to minimize the influence of the connecting portion 52 on the light, in some embodiments, the orthographic projection of the connecting portion 52 on the substrate 1 is set to at least partially overlap with the orthographic projection of the thinning area 41 on the substrate 1, and the orthographic projection of the edge of the thinning area 41 on the side close to the pixel opening 301 on the substrate 1 is outside the range of the orthographic projection of the connecting portion 52 on the substrate 1.

[0101] In some embodiments, the orthographic projection of the connecting portion 52 on the substrate 1 is located within the orthographic projection range of the thinning region 41 on the substrate 1 .

[0102] See also Figure 5 There is a certain distance between the orthographic projection of the end of the connecting portion 52 facing the pixel opening 301 on the substrate 1 and the orthographic projection of the end of the thinning area 41 facing the pixel opening 301 on the substrate 1, thereby ensuring that the connecting portion 52 can and only can block part of the thinning area 41 of the light-emitting functional layer 4. Since the thinning area 41 of the light-emitting functional layer 4 is entirely located on the side of the pixel definition layer 3 facing away from the substrate 1, this structure can ensure that the connecting portion 52 will not block the film layer located in the pixel opening 301, thereby ensuring that the corresponding light-emitting unit can achieve a better light-emitting effect as much as possible.

[0103] That is, the length of the portion of the connection portion 52 protruding relative to the crown portion 22 is less than the second length L2. In addition, when the surface of the pixel definition layer 3 facing away from the substrate 1 is also covered with the flat area 42 of the light-emitting functional layer 4, there is a gap between the orthographic projection of the flat area 42 on the substrate 1 and the orthographic projection of the connection portion 52 on the substrate 1. That is, at this time, the connection portion 52 will not block the flat area 42 of the light-emitting functional layer 4, which can reduce the shading effect of the encapsulation layer 5 on the display panel 10 to a certain extent, and the viewing angle of the display panel 10 can be optimized.

[0104] Specifically, the size of the flat region 42 is defined by P3 and P4 mentioned above. When the light-emitting functional layer 4 includes the flat region 42, the flat region 42 is located between P3 and P4.

[0105] See also Figure 5 The size of one end of the connecting portion 52 connected to the crown portion 22 is greater than or equal to the size of the side surface of the crown portion 22, and the size of one end connected to the first covering portion 51 is basically consistent with the first covering portion 51. At this time, the overall shape of the connecting portion 52 is affected by the shape of the first covering portion 51: when the thickness of the first covering portion 51 is greater, the protruding length of the connecting portion 52 toward the pixel opening 301 is longer.

[0106] In order to improve this problem at least to a certain extent, in some embodiments, the thickness of the first covering portion 51 is set to be a first thickness H1, and the second length L2 is not less than half of the first thickness H1.

[0107] Specifically, the first covering portion 51 is a film layer structure with uniform thickness and flat surface.

[0108] Based on pixel density considerations, the second length L2 cannot be too long. Therefore, in some embodiments, the second length L2 is further limited to be no greater than the first thickness H1.

[0109] In order to further ensure that the first thickness H1 does not cause the connection portion 52 to block the flat area 42 of the light-emitting functional layer 4, the second length L2 needs to be changed with the first thickness H1, and the two are positively correlated. It should be noted that the second length L2 cannot exceed the first length L1 at most.

[0110] That is to say, the thicker the first covering portion 51 is, the longer the second length L2 formed between the isolation structure 2 and the pixel opening 301 will be, thereby better adapting to the thickness adjustment of the encapsulation layer 5 and ensuring that both the first length L1 and the second length L2 can change with the change of the encapsulation layer 5.

[0111] In addition, the thickness of the first covering portion 51 will also have a certain influence on the optical effect of the relevant light-emitting unit. When the light is emitted, part of the light will be emitted through the first covering portion 51 and will be refracted in the process.

[0112] In some embodiments, the second length L2 is not less than half of the first thickness H1.

[0113] Since the relationship between the first length L1 and the second length L2 is defined above, it can be inferred that the first length L1 is defined as follows:

[0114] L1≥max[X*H1, L2], where X is the thickness coefficient;

[0115] In some embodiments of the present application, L1 can be comprehensively considered according to design requirements and selected to be greater than or equal to a value related to the thickness of the encapsulation layer 5, or it can be greater than or equal to a value of the second length L2. It only needs to ensure that the value taken is the maximum value of the above two parameters to ensure that the film layer located in the pixel opening 301 in the display panel 10 is relatively flat, while minimizing the shielding of the pixel opening 301 and the film layer in the flat area 42 above the pixel definition layer 3 by the encapsulation layer 5.

[0116] Specifically, the value range of the thickness coefficient X can be between 0.5 and 1.0, and its specific value can be adjusted according to design requirements. The value of the thickness coefficient X can be set to any value between 0.5 and 1.0, such as 0.5, 0.6, 0.7, 0.8, 0.9, and 1.0.

[0117] Specifically, the value range of the first thickness H1 is 0.6 μm-2.0 μm, and the specific value range can be adjusted according to actual needs. For example, the value of the first thickness H1 can be any value of 0.6 μm, 0.7 μm, 0.8 μm, 0.9 μm, 1.0 μm, 1.1 μm, 1.2 μm, 1.3 μm, 1.4 μm, 1.5 μm, 1.6 μm, 1.7 μm, 1.8 μm, 1.9 μm, 2.0 μm, etc.

[0118] Specifically, the value range of the first thickness H1 can be further limited to 1.0μm-2.0μm. In this case, H1 can be any value among 1.0μm, 1.1μm, 1.2μm, 1.3μm, 1.4μm, 1.5μm, 1.6μm, 1.7μm, 1.8μm, 1.9μm, 2.0μm, etc.

[0119] In other embodiments, the encapsulation layer 5 further includes a second covering portion 53 , and the second covering portion 53 covers the light-emitting functional layer 4 and a side surface of the isolation structure 2 close to the isolation opening 201 .

[0120] Specifically, the second covering portion 53 partially covers at least a portion of the peripheral side of the supporting portion 21 close to the isolation opening 201 , and may also cover at least a portion of the surface of the crown portion 22 close to the base 1 .

[0121] The connecting portion 52 can connect the first covering portion 51 and the second covering portion 53 to form a continuous encapsulation layer 5 film structure, ensuring that the encapsulation layer 5 can provide a better encapsulation effect for the isolation opening 201. Generally speaking, the thickness of the first covering portion 51 and the second covering portion 53 are positively correlated.

[0122] Since the first length L1 is also related to the second length L2, it is necessary to limit the acquisition of the second length L2.

[0123] In some embodiments, the range of the second length L2 is related to the thickness of the isolation structure 2. The thickness of the isolation structure 2 is defined as the second thickness H2. The larger the value of H2, the larger the second length L2, and the two are positively correlated.

[0124] In some embodiments, the relationship between the second length L2 and the second thickness H2 may be:

[0125] L2=H2*S, where S is the ratio;

[0126] In this embodiment, the value range of S is 0.577 to 2.246.

[0127] During the evaporation process, the angle between the evaporation source (such as the evaporated metal atom source, etc.) and the surface normal of the substrate being plated is called the evaporation angle. The evaporation angle is used to reflect the incident angle of the particle flow of the evaporated substance when it reaches the substrate.

[0128] The value of the second length L2 is also related to the angle of the evaporation angle. When the thickness of the isolation structure 2 remains fixed, the adjustment of the evaporation angle of the light-emitting functional layer 4 will affect the second length L2: the larger the evaporation angle θ of the light-emitting functional layer 4, the larger the L2 defined by the light-emitting functional layer 4 prepared by evaporation and the isolation structure 2.

[0129] This means that there is a certain positive correlation between the ratio S of the second length L2 and the second thickness H2 and the vapor deposition angle θ of the light-emitting functional layer 4 .

[0130] The relationship between the evaporation angle θ of the light-emitting functional layer 4 and the ratio S is defined below using trigonometric functions.

[0131] Specifically, the relationship between the ratio S and the evaporation angle θ of the light-emitting functional layer 4 is: S=tan(θ).

[0132] That is to say, the larger the tangent value of the evaporation angle θ corresponding to the light-emitting functional layer 4 is, the larger the ratio S of the second length L2 to the second thickness H2 is.

[0133] It should be noted that due to the influence of processing errors, the above ratio S and tan(θ) may not be completely consistent. In order to ensure the reliability of the product, in some embodiments, the relationship between S and tan(θ) can be set as:

[0134] S=tan(θ)+i, where i is the allowable error value in the design, and the value of i can be positive or negative.

[0135] In some embodiments, a ratio S of the second length L2 to the second thickness H2 does not exceed a tangent value of an evaporation angle of the light-emitting functional layer 4 .

[0136] Specifically, the ratio S of the second length L2 to the second thickness H2 is equal to the tangent value of the evaporation angle of the light-emitting functional layer 4 .

[0137] The second length L2 is defined as follows:

[0138] L2=H2*tan(θ);

[0139] In some embodiments, the second thickness H2 may be 0.45 μm to 1.5 μm. The specific numerical range may be adjusted according to actual needs. For example, the second thickness H2 may be 0.45 μm, 0.50 μm, 0.55 μm, 0.60 μm, 0.65 μm, 0.70 μm, 0.75 μm, 0.80 μm, 0.85 μm, 0.90 μm, 0.95 μm, 1.10 μm, 1.15 μm, 1.20 μm, 1.25 μm, 1.30 μm, 1.35 μm, 1.40 μm, 1.45 μm, 1.50 μm, etc.

[0140] Specifically, the second thickness H2 may be limited to a range of 0.7 μm to 0.9 μm. At this time, the second thickness H2 may be any value of 0.7 μm, 0.75 μm, 0.8 μm, 0.85 μm, 0.9 μm, etc. Specifically, the second thickness H2 may be 0.8 μm. The evaporation angle of the light-emitting functional layer 4 may vary within a certain range according to processing requirements and adjustment of the second thickness H2.

[0141] In addition, when the light-emitting functional layer 4 is prepared by evaporation, the two evaporation angles θ facing the same isolation opening 201 may be asymmetric, which may result in different shapes of the two opposite sides of the prepared light-emitting functional layer 4, especially L2, which may form L2 of different lengths. Figure 3 , Figure 3The evaporation source in the evaporation chamber is not arranged directly opposite to the isolation opening 201, resulting in Figure 3 The evaporation angles on the left and right sides are different. Accordingly, the two sides of the obtained light-emitting functional layer 4 are asymmetrically connected, and the lengths of the two L2 are also different. The L2 value of the side with a larger evaporation angle is obviously larger. Of course, when the evaporation source is set directly opposite to the isolation opening 201, Figure 2 The evaporation angle values ​​on the left and right sides are basically consistent. Accordingly, the obtained light-emitting functional layer 4 is basically symmetrical in design, and the two L2 values ​​are also basically consistent.

[0142] Specifically, the evaporation angle θ may range from 30° to 70°, such as 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, etc. Generally speaking, the evaporation angle of the light-emitting functional layer 4 may be 60° or 66°.

[0143] The side of the support portion 21 close to the isolation opening 201 facing the substrate 1 is a first end surface 211 , and the distance between the orthographic projection of the edge of the first end surface 211 on the substrate 1 and the orthographic projection of the edge of the pixel opening 301 on the substrate 1 is a fourth length D.

[0144] The fourth length D is the distance between the side of the isolation structure 2 facing the substrate 1 and the pixel opening 301 formed on the pixel definition layer 3. The fourth length D is defined by P0 and P4.

[0145] Specifically, D=L1+L3.

[0146] The isolation opening 201 is used to arrange the light-emitting unit.

[0147] See also Figure 5 , at least part of the light-emitting unit is located in the isolation opening 201 and the pixel opening 301 in the figure. The light-emitting unit includes a light-emitting functional layer 4, a cathode layer and an anode layer, and the corresponding film layer structure Figure 5 Not all are drawn.

[0148] In some embodiments, the light-emitting functional layer 4 includes a first light-emitting functional layer, a second light-emitting functional layer and a third light-emitting functional layer with different light-emitting colors, the wavelength of the light emitted by the first light-emitting functional layer is smaller than the wavelength of the light emitted by the second light-emitting functional layer, and the wavelength of the light emitted by the second light-emitting functional layer is smaller than the wavelength of the light emitted by the third light-emitting functional layer; wherein any one of the first light-emitting functional layer, the second light-emitting functional layer and the third light-emitting functional layer is provided in the isolation opening 201.

[0149] According to design requirements, a certain isolation opening 201 is only used to place the light-emitting functional layer 4 having the corresponding wavelength of the emitted light.

[0150] Considering that different light-emitting units need to be arranged in different isolation openings 201 of the display panel 10, and different light-emitting units have different wavelengths, in order to optimize the display effect of the display panel 10 and balance the brightness and color performance of light-emitting units of different colors, it is necessary to adjust the D value corresponding to the light-emitting units of different light-emitting colors according to the needs. By adjusting the size of the above-mentioned D value, the emission angle of the light-emitting units of different light-emitting colors and the film layers such as the encapsulation layer 5 during the light emission process can be changed, and the optimization and adjustment of the final light-emitting effect can be achieved in the subsequent light refraction process.

[0151] Of course, the film thicknesses of the light-emitting units of different colors are also different. As the film thickness of the light-emitting unit changes, the D value increases accordingly.

[0152] In some embodiments, in order to further optimize the display effect of the display panel 10 and improve the design width of the pixel gap, different L1 values ​​(or D values) are set in the isolation openings 201 for arranging different light-emitting units.

[0153] Specifically, the fourth length D in the isolation opening 201 with the first light-emitting functional layer is smaller than the fourth length D in the isolation opening 201 with the second light-emitting functional layer; in other words, the first length L1 in the isolation opening 201 with the first light-emitting functional layer is smaller than the first length L1 in the isolation opening 201 with the second light-emitting functional layer.

[0154] Specifically, the fourth length D in the isolation opening 201 with the second light-emitting functional layer is smaller than the fourth length D of the isolation opening 201 with the third light-emitting functional layer; in other words, the first length L1 in the isolation opening 201 with the second light-emitting functional layer is smaller than the first length L1 of the isolation opening 201 with the third light-emitting functional layer.

[0155] In some embodiments, the light emitted by the first light-emitting functional layer is blue, denoted as B, the light emitted by the second light-emitting functional layer is green, denoted as G, and the light emitted by the third light-emitting functional layer is red, denoted as R. Accordingly, the corresponding D values ​​in the isolation openings 201 for placing B, G, and R increase in sequence. Accordingly, the relationship between the shape of each light-emitting unit and the first length L1 is matched. During the evaporation process, refer to Figure 6-Figure 8 , the first length L1 in the straight edge Scan direction can be appropriately reduced, so that the first length L1 in the Nozzle direction is greater than the first length L1 in the straight edge Scan direction. It should be noted that in the direction parallel to the surface where the substrate 1 is located, the straight edge Scan direction and the Nozzle direction are arranged crosswise. Optionally, the straight edge Scan direction and the Nozzle direction are arranged perpendicularly.

[0156] In other embodiments, the size of the light-emitting functional layer 4 located in the corresponding isolation opening 201 in the horizontal direction is also positively correlated with the cathode layer.

[0157] It is understandable that the display panel 10 provided in the embodiment of the present application can be adjusted so that the first length L1 between the isolation structure 2 and the pixel opening 301 is not less than the second length L2 defined by the light-emitting functional layer 4 and the isolation structure 2, so that a sufficiently large spacing can be defined between the isolation opening 201 and the pixel opening 301 for filling the film layer and the film layer can remain relatively flat, such as the light-emitting functional layer 4. After the film layer filled in the isolation opening 201 can maintain a certain flatness, the display effect of the display panel 10 can be improved to a certain extent, so that it can present a better display quality. In addition, the display panel 10 can also adjust the distance between the isolation structure 2 and the pixel opening 301 according to the size of the connection part 52 in the encapsulation layer 5 protruding toward the side of the pixel opening 301, so that the positive projection of the connection part 52 on the substrate 1 falls outside the pixel opening 301, so as to reduce the shielding of the light-emitting functional layer 4 located in the corresponding pixel opening 301 by the connection part 52 of the encapsulation layer 5, and reduce the influence of the viewing angle on the display effect; the thickness of the first covering part 51 in the encapsulation layer 5 is positively correlated with the distance between the isolation structure 2 and the pixel opening 301, and the thicker the thickness of the covering layer, the greater the distance between the isolation structure 2 and the pixel opening 301; the display panel 10 can also adjust the third length located below the isolation structure 2 by adjusting the thickness of the isolation structure 2, so as to meet its overlapping needs when the isolation structure 2 needs to overlap with the conductive film layer (such as the electrode layer); when the isolation structure 2 does not need to overlap with the conductive film layer, the design width of the pixel gap can be improved by adjusting the third length, which helps to increase the pixel density and enhance the display effect of the display panel 10.

[0158] In another embodiment of the present application, a display device 100 is provided. The display device 100 includes any one of the display panels 10 described above. Fig. 9 .

[0159] In the embodiment provided in the present application, the display device 100 has the above-mentioned display panel 10, and thus has at least the advantages of the above-mentioned display panel 10. The specific effects refer to the specific description in the above-mentioned embodiment, which will not be repeated here.

[0160] The display device 100 provided in this embodiment can be a mobile phone, a notebook, a tablet computer, a smart watch, a smart bracelet, a navigator, a display, a personal digital assistant (PDA), and other products or components with display functions.

[0161] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: substrate; an isolation structure, located on the substrate, the isolation structure comprising a support portion and a crown portion, the crown portion being located on a side of the support portion facing away from the substrate; The isolation structure is provided with an isolation opening, and the isolation opening is provided by the support portion and the crown portion; A pixel definition layer is located between the substrate and the isolation structure, the pixel definition layer is provided with a pixel opening, and the orthographic projection of the pixel opening on the substrate is located within the orthographic projection range of the isolation opening on the substrate; a light-emitting functional layer, the light-emitting functional layer covering the pixel opening and at least partially covering a surface of the pixel definition layer on a side facing away from the substrate, the light-emitting functional layer comprising a thinning area, the thinning area being located on a side of the pixel definition layer facing away from the substrate, and an orthographic projection of the thinning area on the substrate at least partially surrounding an orthographic projection of the pixel opening on the substrate; Among them, the distance between the orthographic projection of the edge of the crown near the isolation opening on the substrate and the orthographic projection of the edge of the pixel opening on the substrate is a first length, and the distance between the orthographic projection of the edge of the crown near the isolation opening on the substrate and the orthographic projection of the edge of the thinning area on one side near the pixel opening on the substrate is a second length, and the first length is not less than the second length.

2. The display panel according to claim 1, characterized in that: The display panel further includes an encapsulation layer, the encapsulation layer including a first covering portion and a connecting portion, the first covering portion is located on a side of the isolation structure facing away from the substrate, and is in contact with an edge of the crown portion close to the isolation opening via the connecting portion, and at least a portion of the connecting portion protrudes relative to the crown portion toward the isolation opening; Preferably, the encapsulation layer further comprises a second covering portion, and the second covering portion at least covers the light-emitting functional layer; Preferably, the second covering portion also covers at least a portion of the peripheral side of the supporting portion close to the isolation opening; Preferably, the second covering portion also covers at least a portion of a surface of the crown portion close to the base.

3. The display panel according to claim 2, characterized in that: The orthographic projection of the connecting portion on the substrate at least partially overlaps with the orthographic projection of the thinning area on the substrate, and the orthographic projection of the edge of the thinning area close to the pixel opening on the substrate is outside the orthographic projection range of the connecting portion on the substrate; Preferably, an orthographic projection of the connecting portion on the substrate is located within an orthographic projection of the thinned region on the substrate.

4. The display panel according to claim 2, characterized in that: The thickness of the first covering portion is a first thickness, and the second length is not less than half of the first thickness.

5. The display panel according to claim 4, characterized in that: The second length is not greater than the first thickness; Preferably, the relationship between the first length and the second length satisfies L1≥max[X*H1, L2], where L1 is the first length, L2 is the second length, H1 is the first thickness, X is the thickness coefficient, and the value range of the thickness coefficient X is 0.5 to 1.

0.

6. The display panel according to claim 4, characterized in that: The first thickness is 0.6 μm-2.0 μm.

7. The display panel according to claim 1, characterized in that: The thickness of the isolation structure is a second thickness, and the second length is positively correlated with the second thickness; Preferably, the ratio of the second length to the second thickness ranges from 0.577 to 2.

246.

8. The display panel according to claim 7, characterized in that: The ratio of the second length to the second thickness does not exceed the tangent value of the evaporation angle of the light-emitting functional layer; Preferably, the ratio of the second length to the second thickness is the tangent value of the evaporation angle of the light-emitting functional layer.

9. The display panel according to claim 7, characterized in that: The second thickness is 0.45 μm to 1.5 μm.

10. The display panel according to claim 1, characterized in that: The orthographic projection of the thinned area on the substrate partially coincides with the orthographic projection of the crown portion close to the isolation opening on the substrate; An orthographic projection of the thinned area on the substrate is spaced apart from an orthographic projection of the support portion close to the isolation opening on the substrate.

11. The display panel according to any one of claims 1 to 10, characterized in that: The light-emitting functional layer further comprises a flat region, which is located on the side of the pixel definition layer facing away from the substrate, is connected to the thinning region and is located on the side of the thinning region facing the pixel opening.

12. The display panel according to claim 11, characterized in that: The orthographic projection of the support portion on the base is located within the orthographic projection of the crown portion on the base; Preferably, the support portion comprises at least two superimposed sub-support portions, and the orthographic projection of the sub-support portion far from the substrate on the substrate is located within the orthographic projection range of the sub-support portion close to the substrate on the substrate; Preferably, the orthographic projection of the sub-support portion close to the base on the base is located within the range of the orthographic projection of the crown portion on the base.

13. The display panel according to claim 12, characterized in that: The side of the support portion close to the isolation opening facing the substrate is a first end surface, and the distance between the orthographic projection of the edge of the first end surface on the substrate and the orthographic projection of the edge of the crown portion close to the isolation opening on the substrate is a third length, and the third length is not greater than 0.8 μm; Preferably, the third length ranges from 0.3 μm to 0.8 μm.

14. The display panel according to claim 13, characterized in that: In a cross-sectional direction perpendicular to the substrate, the flat region in the isolation opening includes a first flat region and a second flat region that are arranged opposite to each other, the first flat region and the second flat region are respectively located on both sides of the pixel opening, and the length of the first flat region is greater than the length of the second flat region; The sidewall of the isolation structure arranged corresponding to the first flat area is a first sidewall, the sidewall of the isolation structure arranged corresponding to the second flat area is a second sidewall, and the third length corresponding to the first sidewall is greater than the third length corresponding to the second sidewall.

15. The display panel according to claim 13, characterized in that: The luminescent functional layer comprises a first luminescent functional layer, a second luminescent functional layer and a third luminescent functional layer with different luminescent colors, the wavelength of the light emitted by the first luminescent functional layer is smaller than the wavelength of the light emitted by the second luminescent functional layer, and the wavelength of the light emitted by the second luminescent functional layer is smaller than the wavelength of the light emitted by the third luminescent functional layer; Wherein, any one of the first light-emitting functional layer, the second light-emitting functional layer and the third light-emitting functional layer is disposed in the isolation opening.

16. The display panel according to claim 15, characterized in that: The distance between the orthographic projection of the edge of the first end surface on the substrate and the orthographic projection of the edge of the pixel opening on the substrate is a fourth length, and the fourth length is the sum of the first length and the third length; The fourth length in the isolation opening having the first light-emitting functional layer is smaller than the fourth length in the isolation opening having the second light-emitting functional layer; The fourth length in the isolation opening having the second light-emitting functional layer is smaller than the fourth length in the isolation opening having the third light-emitting functional layer.

17. A display device, characterized in that: A display panel comprising any one of claims 1-16.

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