Display panel and manufacturing method thereof, and display device

Abstract

The present application discloses a display panel and a preparation method thereof, and a display device, and relates to the field of display technology. The electrode pattern of the first target sub-pixel in the display panel is lifted up by a raised structure in the flat layer of the first target sub-pixel, and the orthographic projection of the part of the light-emitting pattern that contacts both the electrode pattern and the electrode layer on the base substrate covers the orthographic projection of the raised structure on the base substrate, so that the area in the display panel where the raised structure is provided can emit light normally. In addition, by designing a raised structure in the flat layer of the first target sub-pixel, it can be ensured that the light of the bent part of the display panel can be emitted normally, thereby avoiding the color deviation of the image displayed on the side of the display device, and the display effect of the display device is better.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a method for preparing the same, and a display device. Background Art

[0002] With the development of science and technology, flexible display panels have been widely used in curved display devices due to their good bending performance.

[0003] In the related art, a curved display device includes a curved cover plate and a flexible display panel attached to the curved cover plate. The curved cover plate may be a cover plate with an inwardly bent boundary, and the flexible display panel may be attached to the inner side of the curved cover plate, and after the flexible display panel is attached to the curved cover plate, the boundary of the flexible display panel will also bend inward. The front and side surfaces of the curved display device composed of the curved cover plate and the flexible display panel can be used to display images. Among them, the side surface of the curved display device is composed of the bent boundary of the curved cover plate and the bent boundary of the flexible display panel.

[0004] However, since the light emitted by the sub-pixels at the bent boundary of the flexible display panel cannot be emitted, the image displayed on the side of the curved display device will have a color shift phenomenon, and the display effect of the curved display device is poor. Summary of the invention

[0005] The present application provides a display panel and a method for manufacturing the same, and a display device, which can solve the problem of poor display effect of curved display devices in related technologies. The technical solution is as follows:

[0006] In one aspect, a display panel is provided, comprising:

[0007] A base substrate, wherein the base substrate has a curved display area and a flat display area, and the curved display area is used for curved display;

[0008] and a plurality of first sub-pixels located in the curved display area and a plurality of second sub-pixels located in the flat display area, wherein the first sub-pixels and the second sub-pixels respectively include: a flat layer, an electrode pattern, a light-emitting pattern, and an electrode layer sequentially stacked in a direction away from the base substrate;

[0009] The plurality of first sub-pixels include: at least one first target sub-pixel and at least one second target sub-pixel, the planar layer of the first target sub-pixel having a convex structure, and a maximum distance between a side of the planar layer of the second target sub-pixel away from the base substrate and a side of the planar layer of the second target sub-pixel close to the base substrate is smaller than a maximum distance between a side of the planar layer of the first target sub-pixel away from the base substrate and a side of the planar layer of the first target sub-pixel close to the base substrate;

[0010] Among them, for the first target sub-pixel, the orthographic projection of the part of the light-emitting pattern in the first target sub-pixel that contacts both the electrode pattern and the electrode layer on the base substrate is the orthographic projection of the protruding structure of the flat layer covering the first target sub-pixel on the base substrate.

[0011] Optionally, the color of the light emitted by the at least one first target sub-pixel is different from the color of the light emitted by the at least one second target sub-pixel;

[0012] The at least one first target sub-pixel includes a blue sub-pixel, and the at least one second target sub-pixel includes at least one of a red sub-pixel and a green sub-pixel.

[0013] Optionally, the at least one first target sub-pixel includes a blue sub-pixel, a red sub-pixel and a green sub-pixel; the convex structure of the planar layer in each of the first target sub-pixels has a middle area and a peripheral area;

[0014] In a first plane perpendicular to the supporting surface of the base substrate, a first angle between a tangent line of a peripheral area of ​​the protruding structure in the blue sub-pixel and a surface close to the base substrate is greater than or equal to a second angle between a tangent line of a peripheral area of ​​the protruding structure in the red sub-pixel and a surface close to the base substrate.

[0015] Optionally, the first angle is greater than or equal to a third angle between a tangent line of a peripheral region of the protruding structure in the green sub-pixel and a surface close to the substrate.

[0016] Optionally, the first angle is greater than or equal to about 5 degrees and less than or equal to about 40 degrees.

[0017] Optionally, the second angle and the third angle are both greater than or equal to approximately 0 degrees and less than or equal to approximately 40 degrees.

[0018] Optionally, the first angle ranges from about 8 degrees to about 12 degrees.

[0019] Optionally, each of the sub-pixels further comprises: a pixel defining layer located on a side of the electrode pattern away from the base substrate; the pixel defining layer has an opening, and at least a portion of the light emitting pattern of the sub-pixel is located in the opening;

[0020] The slope angle of the opening of the pixel definition layer of each of the first target sub-pixels is smaller than the slope angle of the opening of the pixel definition layer of any of the second target sub-pixels;

[0021] The slope angle of the opening of the pixel defining layer is the angle between the side surface of the opening of the pixel defining layer and a surface of the pixel defining layer close to the base substrate.

[0022] Optionally, the slope angle of the opening of the pixel defining layer of the blue sub-pixel in the display panel is smaller than the slope angle of the opening of the pixel defining layer of the red sub-pixel in the display panel, and smaller than the slope angle of the opening of the pixel defining layer of the green sub-pixel in the display panel.

[0023] Optionally, the convex structure in each of the first target sub-pixels includes: a first sub-convex structure and a second sub-convex structure arranged along a first direction;

[0024] The length of the first sub-protrusion structure along the second direction is greater than the length along the first direction, the length of the second sub-protrusion structure along the second direction is greater than the length along the first direction, the second direction is approximately perpendicular to the first direction, and the first direction and the second direction are approximately parallel to the supporting surface of the base substrate.

[0025] Optionally, the length of the first sub-protrusion structure along the first direction is substantially equal to the length of the second sub-protrusion structure along the first direction;

[0026] The length of the first sub-protrusion structure along the second direction is substantially equal to the length of the second sub-protrusion structure along the second direction.

[0027] Optionally, the light emitting region of each of the first target sub-pixels has a symmetry axis extending along the second direction;

[0028] An orthographic projection of the first sub-protrusion structure on the base substrate and an orthographic projection of the second sub-protrusion structure on the base substrate are substantially symmetrical with respect to an orthographic projection of the symmetry axis on the base substrate.

[0029] Optionally, each of the sub-pixels further includes: a source-drain electrode layer located on a side of the planar layer close to the base substrate, the source-drain electrode layer having a source-drain metal pattern;

[0030] The orthographic projection of the protruding structure in each of the first target sub-pixels on the base substrate at least partially overlaps with the orthographic projection of the source-drain metal pattern on the base substrate.

[0031] Optionally, the source-drain metal pattern includes: a first pattern and a second pattern;

[0032] The length of the first pattern along the second direction is greater than the length of the first pattern along the first direction, and the length of the second pattern along the second direction is greater than the length of the second pattern along the first direction, the second direction is substantially perpendicular to the first direction, and the first direction and the second direction are both substantially parallel to the supporting surface of the base substrate;

[0033] For the electrode pattern in each of the first target sub-pixels, the length of the electrode pattern along the second direction is greater than the length of the electrode pattern along the first direction, and the electrode pattern has a first edge portion and a second edge portion arranged along the first direction, the orthographic projection of the first edge portion on the substrate overlaps with the orthographic projection of the first pattern on the substrate, and the orthographic projection of the second edge portion on the substrate overlaps with the orthographic projection of the second pattern on the substrate.

[0034] Optionally, a ratio of a maximum dimension of the protruding structure in the second plane to a maximum dimension of the protruding structure in a direction perpendicular to the supporting surface of the substrate in each of the first target sub-pixels is greater than or equal to about 5 and less than or equal to about 20;

[0035] Wherein, the second plane is substantially parallel to the bearing surface.

[0036] Optionally, the plurality of second sub-pixels include: at least one third target sub-pixel and at least one fourth target sub-pixel;

[0037] The planar layer of the third target sub-pixel has a protruding structure, and the maximum distance between a side of the planar layer of the fourth target sub-pixel away from the substrate substrate and a side of the planar layer of the fourth target sub-pixel close to the substrate substrate is smaller than the maximum distance between a side of the planar layer of the third target sub-pixel away from the substrate substrate and a side of the planar layer of the third target sub-pixel close to the substrate substrate.

[0038] Optionally, the maximum dimension of the protruding structure of each of the third target sub-pixels in a direction perpendicular to the carrying surface of the substrate is smaller than the maximum dimension of the protruding structure of any of the first target sub-pixels in a direction perpendicular to the carrying surface.

[0039] Optionally, the planar layer of each of the sub-pixels has a via hole;

[0040] For each of the first target sub-pixels, an orthographic projection of the via hole on the base substrate is separated from an orthographic projection of the protrusion structure on the base substrate.

[0041] In another aspect, a method for preparing a display panel is provided, the method comprising:

[0042] forming a plurality of first sub-pixels in a curved display area of ​​a base substrate, and forming a plurality of second sub-pixels in a flat display area of ​​the base substrate, wherein the curved display area is used for curved display;

[0043] Wherein, forming the first sub-pixel and the second sub-pixel respectively comprises: sequentially forming a planar layer, an electrode pattern, a light-emitting pattern, and an electrode layer in a direction away from the base substrate;

[0044] The plurality of first sub-pixels include: at least one first target sub-pixel and at least one second target sub-pixel, the planar layer of the first target sub-pixel having a convex structure, and a maximum distance between a side of the planar layer of the second target sub-pixel away from the base substrate and a side of the planar layer of the second target sub-pixel close to the base substrate is smaller than a maximum distance between a side of the planar layer of the first target sub-pixel away from the base substrate and a side of the planar layer of the first target sub-pixel close to the base substrate;

[0045] For the first target sub-pixel, the orthographic projection of the portion of the first target sub-pixel where the light emitting pattern contacts both the electrode pattern and the electrode layer on the base substrate covers the orthographic projection of the protruding structure of the planar layer on the base substrate.

[0046] Optionally, forming the planar layer of the first target sub-pixel on one side of the base substrate includes:

[0047] forming a flat film layer on one side of the substrate;

[0048] Applying photoresist;

[0049] Exposing the photoresist using a half-tone mask;

[0050] developing the photoresist;

[0051] Etching the flat film layer to obtain the flat layer;

[0052] The light transmittance of the portion of the half-tone mask corresponding to the portion of the planar layer having the convex structure is different from the light transmittance of the portion of the half-tone mask corresponding to the other portion of the planar layer except the convex structure.

[0053] Optionally, the color of the light emitted by the at least one first target sub-pixel is different from the color of the light emitted by the at least one second target sub-pixel;

[0054] The at least one first target sub-pixel includes a blue sub-pixel, and the at least one second target sub-pixel includes a red sub-pixel and a green sub-pixel.

[0055] In yet another aspect, a display device is provided, the display device comprising: a power supply component and the display panel as described in the above aspect;

[0056] The power supply component is used to supply power to the display panel.

[0057] The beneficial effects of the technical solution provided by this application include at least:

[0058] The present application provides a display panel and a method for manufacturing the same, and a display device, wherein the electrode pattern of the first target sub-pixel in the display panel is lifted up by a raised structure in the flat layer of the first target sub-pixel, and the orthographic projection of the portion of the light-emitting pattern that contacts both the electrode pattern and the electrode layer on the substrate covers the orthographic projection of the raised structure on the substrate, so that the area of ​​the display panel where the raised structure is provided can emit light normally. Furthermore, by designing a raised structure in the flat layer of the first target sub-pixel, it can be ensured that the light of the bent portion of the display panel can be emitted normally, thereby avoiding the color deviation of the image displayed on the side of the display device, and the display effect of the display device is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments 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 creative work.

[0060] Figure 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0061] Figure 2 is a top view of a substrate provided in an embodiment of the present application;

[0062] Figure 3 is a schematic diagram of a substrate and sub-pixels provided in an embodiment of the present application;

[0063] Figure 4 is a schematic diagram of another substrate and sub-pixels provided in an embodiment of the present application;

[0064] Figure 5 is a schematic diagram of a planar layer and an electrode pattern provided in an embodiment of the present application;

[0065] Figure 6 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0066] Figure 7 is a top view of a pixel defining layer provided in an embodiment of the present application;

[0067] Figure 8 is a schematic diagram of a pixel definition layer of a red sub-pixel provided in an embodiment of the present application;

[0068] Fig. 9 is a schematic diagram of a pixel definition layer of a green sub-pixel provided in an embodiment of the present application;

[0069] Fig.10 is a schematic diagram of a pixel definition layer of a blue sub-pixel provided in an embodiment of the present application;

[0070] Fig.11 is a structural schematic diagram of another display panel provided in an embodiment of the present application;

[0071] Fig.12 is a schematic diagram of a planar layer of a first target sub-pixel provided in an embodiment of the present application;

[0072] Fig.13 is a schematic diagram of a partial structure of a display panel provided in an embodiment of the present application;

[0073] Fig.14 is a schematic diagram of a source-drain metal pattern and a planarization layer provided in an embodiment of the present application;

[0074] Fig.15 It is a schematic diagram of the structure of a source-drain metal pattern provided in an embodiment of the present application;

[0075] Fig.16 is a schematic structural diagram of an electrode pattern provided in an embodiment of the present application;

[0076] Fig.17 It is a schematic diagram of a source-drain layer, a planar layer and an electrode pattern provided in an embodiment of the present application;

[0077] Fig.18 is a flow chart of a method for preparing a display panel provided in an embodiment of the present application;

[0078] Fig.19is a flow chart of forming a flat layer provided in an embodiment of the present application;

[0079] Fig. 20 is another flow chart of forming a flat layer provided in an embodiment of the present application;

[0080] Fig.21 It is a schematic diagram of forming an active layer, a gate insulating layer, a gate layer, a passivation layer, and a source and drain layer provided in an embodiment of the present application;

[0081] Fig. 22 is a schematic structural diagram of a source and drain electrode layer of multiple sub-pixels provided in an embodiment of the present application;

[0082] Fig.23 is a schematic diagram of forming a flat film layer provided in an embodiment of the present application;

[0083] Fig.24 is a schematic diagram of forming a flat layer provided in an embodiment of the present application;

[0084] Fig.25 is a top view of a planar layer of multiple sub-pixels provided in an embodiment of the present application;

[0085] Fig.26 It is a schematic diagram of a source / drain layer and a planar layer of a plurality of sub-pixels provided in an embodiment of the present application;

[0086] Fig. 27 yes Fig.26 Cross-sectional view along AA direction;

[0087] Fig.28 is a schematic diagram of forming an electrode pattern provided in an embodiment of the present application;

[0088] Fig.29 It is a schematic diagram of a source and drain layer, a planar layer and an electrode pattern of multiple sub-pixels provided in an embodiment of the present application;

[0089] Fig.30 is a top view of electrode patterns of multiple sub-pixels provided in an embodiment of the present application;

[0090] Fig.31 is a schematic diagram of a pixel defining layer for forming a plurality of sub-pixels provided in an embodiment of the present application;

[0091] Fig.32 is a top view of a pixel definition layer of multiple sub-pixels provided in an embodiment of the present application;

[0092] Fig.33 It is a schematic diagram of a source and drain layer, a planar layer, an electrode group and a pixel definition layer of a plurality of sub-pixels provided in an embodiment of the present application;

[0093] Fig.34 is a schematic diagram of forming an electrode pattern provided in an embodiment of the present application;

[0094] Fig.35 It is a structural schematic diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0095] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0096] Figure 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application. Figure 1 It can be seen that the display panel 10 may include: a base substrate 101 , a plurality of first sub-pixels 102 and a plurality of second sub-pixels 103 . Figure 2 1 is a top view of a substrate provided in an embodiment of the present application. Figure 1 and Figure 2 The base substrate 101 may have a curved display area 101a and a flat display area 101b, and the curved display area 101a may be used for curved display. Figure 2 The middle curved display area 101a includes two sub-areas (c1 and c2), and the two sub-areas (c1 and c2) can be areas of the left and right edges of the base substrate 101 respectively, and the two sub-areas (c1 and c2) can be located on both sides of a flat display area 101b respectively.

[0097] refer to Figure 1 The plurality of first sub-pixels 102 may be located in the curved display area 101a, and the plurality of second sub-pixels 103 may be located in the planar display area 101b. Figure 1 The number of the first sub-pixels 102 and the second sub-pixels 103 shown in the figure does not represent the actual number of sub-pixels in the display panel, but is only for illustrating the arrangement positions of the plurality of first sub-pixels 102 and the plurality of second sub-pixels 103 .

[0098] Figure 3 It is a schematic diagram of a substrate and sub-pixels provided in an embodiment of the present application. Figure 3 The sub-pixel illustrated in the figure may be the first sub-pixel 102 or the second sub-pixel 103 .

[0099] refer to Figure 3The first sub-pixel 102 and the second sub-pixel 103 may respectively include: a planarization layer (PLN) a1, an electrode pattern a2, a light emitting pattern a3, and an electrode layer a4 stacked in sequence in a direction away from the base substrate 101. The electrode layer a4 of the sub-pixels included in the display panel 10 may be shared, that is, the electrode layers a4 of the plurality of sub-pixels are an integrated structure.

[0100] In the present embodiment, it is assumed that Figure 3 The two sub-pixels shown in FIG. 1 are both first sub-pixels. Figure 3 , the plurality of first sub-pixels 102 may include: at least one first target sub-pixel 102 a and at least one second target sub-pixel 102 b. Figure 3 , a first target sub-pixel 102a and a second target sub-pixel 102b are illustrated. The flat layer a1 of the first target sub-pixel 102a has a protruding structure A. The maximum distance d2 between the side of the flat layer a1 of the second target sub-pixel 102b away from the base substrate 101 and the side of the flat layer a1 of the second target sub-pixel 102b close to the base substrate 101 is smaller than the maximum distance d1 between the side of the flat layer a1 of the first target sub-pixel 102a away from the base substrate 101 and the side of the flat layer a1 of the first target sub-pixel 102a close to the base substrate 101.

[0101] The maximum distance d2 between the side of the flat layer a1 of the second target sub-pixel 102b away from the substrate 101 and the side of the flat layer a1 of the second target sub-pixel 102b close to the substrate 101 may refer to: the maximum length of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the supporting surface of the substrate 101. The maximum distance d1 between the side of the flat layer a1 of the first target sub-pixel 102a away from the substrate 101 and the side of the flat layer a1 of the first target sub-pixel 102a close to the substrate 101 may refer to: the maximum length of the flat layer a1 of the first target sub-pixel 102a along the direction perpendicular to the supporting surface of the substrate 101.

[0102] Optionally, the flat layer a1 of the second target sub-pixel 102b may not have the protruding structure A, so that the distance between the side of the flat layer a1 of the second target sub-pixel 102b away from the substrate 101 and the side of the flat layer a1 of the second target sub-pixel 102b close to the substrate 101 can be equal everywhere. In this case, the maximum length of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the supporting surface of the substrate 101 is: the distance between the side of the flat layer a1 of the second target sub-pixel 102b away from the substrate 101 and the side of the flat layer a1 of the second target sub-pixel 102b close to the substrate 101.

[0103] In the embodiment of the present application, the distance between the side of the portion of the flat layer a1 other than the protruding structure A away from the substrate 101 and the side of the portion close to the substrate 101 is a fixed value. Therefore, when the flat layer a1 of the second target sub-pixel 102b does not have the protruding structure A, the distance d3 between the side of the portion of the flat layer a1 of the first target sub-pixel 102a other than the protruding structure A away from the substrate 101 and the side of the portion close to the substrate 101 is equal to the maximum length d2 of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the bearing surface of the substrate 101. By designing the protruding structure A in the flat layer a1 of the first target sub-pixel 102a, the maximum length d1 of the flat layer a1 of the first target sub-pixel 102a along the direction perpendicular to the bearing surface of the substrate 101 can be made greater than the maximum length d2 of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the bearing surface of the substrate 101.

[0104] Alternatively, refer to Figure 4 , the flat layer a1 of the second target sub-pixel 102b may also have a convex structure A. However, the length of the convex structure A of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the bearing surface of the base substrate 101 is less than the length of the convex structure A of the flat layer a1 of the first target sub-pixel 102a along the direction perpendicular to the bearing surface of the base substrate 101. Thus, the maximum length d1 of the flat layer a1 of the first target sub-pixel 102a along the direction perpendicular to the bearing surface of the base substrate 101 can be greater than the maximum length d2 of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the bearing surface of the base substrate 101.

[0105] In the embodiment of the present application, the curved display area 101a of the base substrate 101 can constitute the curved portion of the display panel. Since the first target sub-pixel 102a in the first sub-pixel 102 located in the curved display area 101a has a convex structure A, the light emitted from the curved portion of the display panel 10 can be emitted normally, thereby ensuring the display effect of the display device. In addition, the flat display area 101b of the base substrate 101 can constitute the non-bending portion of the display panel. Under normal circumstances, the light emitted from the non-bending portion of the display panel can be emitted normally, so there is no need to adjust the angle of the light emitted from the non-bending portion of the display panel. As a result, the flat layer a1 of the second sub-pixel 103 located in the flat display area 101b may not have the convex structure A. Of course, the flat layer a1 of the second sub-pixel 103 may also have a convex structure A, which is not limited in the embodiment of the present application.

[0106] refer to Figure 3 and Figure 4, for the first target sub-pixel 102a, the orthographic projection of the portion of the light emitting pattern a3 in the first target sub-pixel 102a that contacts both the electrode pattern a2 and the electrode layer a4 on the base substrate 101 covers the orthographic projection of the convex structure A of the flat layer a1 in the first target sub-pixel 102a on the base substrate 101. That is, the entire side of the convex structure A away from the base substrate 101 contacts the side of the electrode pattern a2 in the first target sub-pixel 102a that contacts the base substrate 101. Alternatively, it can be understood that the portion of the convex structure A that contacts the electrode pattern a2 is the entire side of the convex structure A away from the base substrate 101.

[0107] In the embodiment of the present application, the side of the light emitting pattern a3 in each sub-pixel close to the base substrate 101 may contact the side of the electrode pattern a2 of the sub-pixel away from the base substrate 101. In addition, the side of the light emitting pattern a3 of each sub-pixel away from the base substrate 101 may contact the side of the electrode layer a4 close to the base substrate 101.

[0108] Among them, the orthographic projection of the portion of the light-emitting pattern a3 in the first target sub-pixel 102a that contacts both the electrode pattern a2 and the electrode layer a4 on the base substrate 101 covers the orthographic projection of the protruding structure A of the flat layer a1 in the first target sub-pixel 102a on the base substrate 101. Since only the portion of the light-emitting pattern a3 that contacts both the electrode pattern a2 and the electrode layer a4 can emit light normally, the orthographic projection of the portion of the light-emitting pattern a3 that contacts both the electrode pattern a2 and the electrode layer a4 on the base substrate 101 covers the orthographic projection of the protruding structure A on the base substrate 101, which can ensure that the area of ​​the display panel provided with the protruding structure A can emit light normally.

[0109] refer to Figure 3 and Figure 4 Since the electrode pattern a2 in the first target sub-pixel 102a is located on the side of the protruding structure A in the flat layer a1 away from the base substrate 101, the electrode pattern a2 can be lifted up by the protruding structure A. When the display panel 10 is bent, the angle of the light emitted from the bent portion of the display panel 10 is adjusted by lifting the electrode pattern a2 by the protruding structure A.

[0110] In summary, the embodiment of the present application provides a display panel, in which the electrode pattern of the first target sub-pixel is lifted up by the raised structure in the flat layer of the first target sub-pixel, and the orthographic projection of the part of the light-emitting pattern that contacts both the electrode pattern and the electrode layer on the base substrate covers the orthographic projection of the raised structure on the base substrate, so that the area in the display panel where the raised structure is provided can emit light normally. In addition, by designing a raised structure in the flat layer of the first target sub-pixel, it can be ensured that the light of the bent part of the display panel can be emitted normally, thereby avoiding the color deviation of the image displayed on the side of the display device, and the display effect of the display device is better.

[0111] Optionally, the electrode pattern a2 may be an anode (AND) pattern, and the electrode layer a4 may be a cathode layer (cathode).

[0112] In the embodiment of the present application, the color of the light emitted by at least one first target sub-pixel 102a is different from the color of the light emitted by at least one second target sub-pixel 102b. The at least one first target sub-pixel 102a includes a blue (blue, B) sub-pixel, and the at least one second target sub-pixel 102b includes: at least one of a red (red, R) sub-pixel and a green (green, G) sub-pixel.

[0113] That is, the planar layer a1 in the blue sub-pixel may have the protruding structure A. The planar layer a1 in the red sub-pixel and the planar layer a1 in the green sub-pixel may not have the protruding structure A.

[0114] Alternatively, the flat layer a1 in the blue sub-pixel, the flat layer a1 in the red sub-pixel, and the flat layer a1 in the green sub-pixel may all have a convex structure A. Furthermore, the length of the convex structure A in the direction perpendicular to the carrying surface of the base substrate 101 of the flat layer a1 in the red sub-pixel and the flat layer a1 in the green sub-pixel is smaller than the length of the convex structure A in the direction perpendicular to the carrying surface of the base substrate 101 of the flat layer a1 in the blue sub-pixel. The length of the convex structure A in the direction perpendicular to the carrying surface of the base substrate 101 may be the thickness of the convex structure A.

[0115] In the embodiment of the present application, at least one first target sub-pixel 102a includes a blue sub-pixel, a red sub-pixel and a green sub-pixel. Figure 5 , the protruding structure A of the planar layer a1 in the first target sub-pixel 102a has a middle area a11 and a peripheral area a12.

[0116] Optionally, in a first plane perpendicular to the supporting surface of the base substrate 101, a first angle between a tangent line of a peripheral region a12 of the protruding structure A in the blue sub-pixel and a side close to the base substrate 101 may be greater than or equal to a second angle between a tangent line of a peripheral region a12 of the protruding structure A in the red sub-pixel and a side close to the base substrate 101. Furthermore, in a first plane perpendicular to the supporting surface of the base substrate 101, a first angle between a tangent line of a peripheral region a12 of the protruding structure A in the blue sub-pixel and a side close to the base substrate 101 may be greater than or equal to a third angle between a tangent line of a peripheral region a12 of the protruding structure A in the green sub-pixel and a side close to the base substrate 101. The side of the protruding structure A close to the base substrate 101 may be the bottom surface of the protruding structure A.

[0117] That is, the first angle between the tangent line of the peripheral area a12 of the convex structure A of the flat layer a1 in the blue sub-pixel and the bottom surface can be designed to be larger, while the second angle between the tangent line of the peripheral area a12 of the convex structure A of the flat layer a1 in the red sub-pixel and the bottom surface, and the third angle between the tangent line of the peripheral area a12 of the convex structure A of the flat layer a1 in the green sub-pixel and the bottom surface can be designed to be smaller.

[0118] The blue sub-pixel emits blue light, the red sub-pixel emits red light, and the green sub-pixel emits green light. The wavelength of blue light is shorter than that of red light and green light, so it is difficult for blue light to be emitted from the bent portion of the display panel 10 compared to red light and green light. Therefore, the first angle between the tangent line of the peripheral area a12 of the convex structure A of the flat layer a1 in the blue sub-pixel and the bottom surface is designed to be larger, which can ensure that the light emitted by the blue sub-pixel can be emitted normally.

[0119] Optionally, the first angle may be greater than or equal to about 5° (degrees) and less than or equal to about 40°. The second angle and the third angle are both greater than or equal to about 0° and less than or equal to about 40°. For example, the first angle ranges from about 8° to about 12°, for example, 10°.

[0120] Here, “about” may refer to a value within the error range caused by the preparation process, or a value within the measurement error range during the measurement process.

[0121] When the second angle and the third angle are both 0°, it means that the flat layer a1 of the red sub-pixel and the green sub-pixel has no protruding structure A. The second angle and the third angle may be the same or different, which is not limited in the present embodiment.

[0122] And refer to Figure 5, the orthographic projection of the side of the protruding structure A away from the base substrate 101 on the base substrate 101 can be located within the orthographic projection of the side of the protruding structure A close to the base substrate 101 on the base substrate 101. Therefore, the angle between the tangent line of the peripheral area a12 of the protruding structure A and the side of the protruding structure A close to the base substrate 101 can be an acute angle, thereby ensuring that the light emitted from the bent portion of the display panel can be emitted normally, avoiding the color cast of the image displayed on the side of the display device, and providing a better display effect of the display device.

[0123] refer to Figure 5 , the peripheral area a12 of each protruding structure A may include a first area a121 and a second area a122 opposite to each other. In the display panel 10, the lengths of the orthographic projections of the first target area and the second target area on the base substrate 101 along the third direction X are both greater than or equal to the length threshold. The third direction X may be a pixel row direction.

[0124] The first target area is a first area a121 of the convex structure A of the planar layer a1 of the blue sub-pixel, and the second target area is a second area a122 of the convex structure A of the planar layer a1 of the blue sub-pixel.

[0125] The length of the orthographic projection of the first area a121 and the second area a122 of the protruding structure A of the flat layer a1 of the blue sub-pixel on the base substrate 101 along the third direction X is designed to be larger. This can avoid the situation where the thickness of the flat layer a1 is too thick (the thickness of the flat layer a1 is too thick, which will cause the display panel to be too thick and difficult to achieve thinness), so that the first angle between the tangent of the peripheral area a12 of the protruding structure A and the bottom surface is smaller, thereby ensuring that the light emitted by the blue sub-pixel can be emitted normally.

[0126] Optionally, the length threshold may be 1 μm (micrometer). That is, the lengths of the orthographic projections of the first area a121 and the second area a122 of the protruding structure A of the flat layer a1 of the blue sub-pixel on the base substrate 101 along the third direction are both greater than or equal to 1 μm. For example, the length d4 of the orthographic projection of the first area a121 in the protruding structure A on the base substrate 101 along the third direction X, and the length d5 ​​of the orthographic projection of the second area a122 in the protruding structure A on the base substrate 101 along the third direction X are approximately 2.5 μm.

[0127] For example, assuming Figure 5The middle convex structure A is the convex structure A of the flat layer a1 of the blue sub-pixel, the length d3 of the orthographic projection of the first area a121 in the convex structure A on the base substrate 101 along the third direction X is 2.43 μm, and the length d5 ​​of the orthographic projection of the second area a122 in the convex structure A102a on the base substrate 101 along the third direction X is 2.62 μm, that is, d4=2.43 μm, d5=2.62 μm. Wherein, Figure 5 The length d5 ​​of the orthographic projection of the first area a121 of the protruding structure A on the base substrate 101 along the third direction X and the length d5 ​​of the orthographic projection of the second area a122 on the base substrate 101 along the third direction X are not equal, but may be equal, which is not limited in the embodiment of the present application.

[0128] In addition, refer to Figure 5 , the distance d6 between the side of the protruding structure A away from the base substrate 101 and the side close to the base substrate 101 along the fourth direction Y is 0.31 μm, that is, d6=0.31 μm. The fourth direction Y is perpendicular to the supporting surface of the base substrate 101. Among them, the distance d6 between the side of the protruding structure A away from the base substrate 101 and the side close to the base substrate 101 along the fourth direction Y can be the thickness of the protruding structure A.

[0129] refer to Figure 5 The orthographic projection of the middle area a11 of the protruding structure A on the first plane can be a straight line, that is, the side of the protruding structure A away from the base substrate 101 can be a plane. The side of the protruding structure A away from the base substrate 101 can be parallel to the supporting surface of the base substrate 101.

[0130] The orthographic projection of the raised structure A on the first plane may be in the shape of a trapezoid. The orthographic projection of the first area a121 of the raised structure A on the first plane and the orthographic projection of the second area a122 on the first plane may be the two waists of the trapezoid respectively, and the orthographic projection of the middle area a11 of the raised structure A on the first plane may be the upper base of the trapezoid. If the length of the orthographic projection of the first area a121 and the length of the orthographic projection of the second area a122 on the first plane in the raised structure A are equal, the orthographic projection of the raised structure A102a on the reference plane may be in the shape of an isosceles trapezoid.

[0131] Figure 6 is a schematic diagram of the structure of another display panel provided in an embodiment of the present application. Figure 6 It can be seen that each sub-pixel may further include: a pixel definition layer (PDL) a5 located on a side of the electrode pattern a2 away from the base substrate 101. Figure 7 , the pixel defining layer a5 may have an opening a51. Figure 7 , the length of the opening a51 in the pixel defining layer a5 along the second direction W is greater than the length of the opening a51 along the first direction Z.

[0132] The opening a51 can expose the target portion of the electrode pattern a2 of the sub-pixel, so that at least a portion of the light-emitting pattern a3 in the sub-pixel located in the opening a51 contacts the target portion. The target portion may include a portion of the electrode pattern a2 that overlaps with the protruding structure A. Thus, the orthographic projection of at least a portion of the light-emitting pattern a3 in the opening a51 on the base substrate 101 can cover the orthographic projection of the protruding structure A on the base substrate 101.

[0133] Optionally, the target portion does not include other portions except the portion of the electrode pattern a2 that overlaps with the raised structure A. That is, the target portion may be the portion of the target electrode pattern a2 that overlaps with the raised structure A. The portion exposed by the opening a51 is the portion of the electrode pattern a2 that overlaps with the raised structure A. Alternatively, the target portion includes other portions except the portion of the electrode pattern a2 that overlaps with the raised structure A, which is not limited in the embodiment of the present application.

[0134] Since the convex structure A has been designed in the flat layer a1 of the first target sub-pixel 102a, the normal emission of the light emitted by the first target sub-pixel 102a can be ensured to a large extent. However, the convex structure A may not be designed in the flat layer a1 of the second target sub-pixel 102b. Therefore, in order to ensure that the light emitted by the second target sub-pixel 102b can also be emitted normally, the slope angle of the opening a51 of the pixel defining layer a5 of the second target sub-pixel 102b can be made larger. Among them, the slope angle of the opening a51 of the pixel defining layer a5 is the angle between the side of the opening a51 of the pixel defining layer a5 and the side of the pixel defining layer a5 close to the base substrate 101.

[0135] Optionally, the slope angle of the opening a51 of the pixel defining layer a5 of each first target sub-pixel 102a may be smaller than the slope angle of the opening a51 of the pixel defining layer a5 of any second target sub-pixel 102b. That is, the slope angle of the opening a51 of the pixel defining layer a5 of the first target sub-pixel 102a may be smaller, while the slope angle of the opening a51 of the pixel defining layer a5 of the second target sub-pixel 102b may be larger.

[0136] For example, the first target sub-pixel 102a includes: a blue sub-pixel. The second target sub-pixel 102b includes: at least one of a red sub-pixel and a green sub-pixel. Thus, the slope angle of the opening a51 of the pixel defining layer a5 of the blue sub-pixel is smaller than the slope angle of the opening a51 of the pixel defining layer a5 of the red sub-pixel, and smaller than the slope angle of the opening a51 of the pixel defining layer a5 of the green sub-pixel.

[0137] Figure 8 Schematic diagram of a pixel definition layer of a red sub-pixel provided in an embodiment of the present application. Fig. 9 It is a schematic diagram of a pixel defining layer of a green sub-pixel provided in an embodiment of the present application. Fig.10 Schematic diagram of a pixel definition layer of a blue sub-pixel provided in an embodiment of the present application. Figures 7 to 9 , the slope angle of the opening a51 of the pixel defining layer a5 of each sub-pixel includes a first sub-slope angle and a second sub-slope angle. The first sub-slope angle is the angle between the tangent line of the part of the side wall of the opening a51 of the pixel defining layer a5 close to the side of the substrate 101 and the plane parallel to the supporting surface of the substrate 101. The second sub-slope angle is the angle between the tangent line of the middle part of the side wall of the opening a51 of the pixel defining layer a5 and the plane parallel to the supporting surface of the substrate 101. Generally, the first sub-slope angle of the pixel defining layer a5 of the sub-pixel is greater than the second sub-slope angle.

[0138] Optionally, the first sub-slope angle B5 of the opening a51 of the pixel defining layer a5 of the blue sub-pixel is smaller than the first sub-slope angle B1 of the opening a51 of the pixel defining layer a5 of the red sub-pixel, and smaller than the first sub-slope angle B3 of the opening a51 of the pixel defining layer a5 of the green sub-pixel. Furthermore, the second sub-slope angle B6 of the opening a51 of the pixel defining layer a5 of the blue sub-pixel is smaller than the second sub-slope angle B2 of the opening a51 of the pixel defining layer a5 of the red sub-pixel, and smaller than the second sub-slope angle B4 of the opening a51 of the pixel defining layer a5 of the green sub-pixel.

[0139] refer to Figures 8 to 10, the first sub-slope angle B1 of the opening a51 of the pixel defining layer a5 of the red sub-pixel is 27.8°, that is, A1=27.8°. The second sub-slope angle B2 of the opening a51 of the pixel defining layer a5 of the red sub-pixel is 13.9°, that is, A2=13.9°. The first sub-slope angle B3 of the opening a51 of the pixel defining layer a5 of the green sub-pixel is 20.9°, that is, A3=20.9°. The second sub-slope angle B4 of the opening a51 of the pixel defining layer a5 of the green sub-pixel is 13.2°, that is, A4=13.2°. The first sub-slope angle B5 of the opening a51 of the pixel defining layer a5 of the blue sub-pixel is 19.8°, that is, A5=19.8°. The second sub-slope angle B6 of the opening a51 of the pixel defining layer a5 of the blue sub-pixel is 13.0°, that is, a7=13.0°.

[0140] Fig.11 This is a schematic diagram of the structure of another display panel provided in an embodiment of the present application. Fig.12 is a schematic diagram of a planar layer of a first target sub-pixel provided in an embodiment of the present application. Fig.11 and Fig.12 It can be seen that the convex structure A in each first target sub-pixel 102 a may include: a first sub-convex structure A1 and a second sub-convex structure A2 arranged along the first direction Z.

[0141] The length of the first sub-protrusion structure A1 along the second direction W may be greater than the length of the first sub-protrusion structure A1 along the first direction Z. The length of the second sub-protrusion structure A2 along the second direction W may be greater than the length of the second sub-protrusion structure A2 along the first direction Z. The second direction W may be substantially perpendicular to the first direction Z, and the first direction Z and the second direction W may both be substantially parallel to the supporting surface of the base substrate 101.

[0142] Optionally, the length of the first sub-protrusion structure A1 along the first direction Z is substantially equal to the length of the second sub-protrusion structure A2 along the first direction Z. The length of the first sub-protrusion structure A1 along the second direction W is substantially equal to the length of the second sub-protrusion structure A2 along the second direction W. For example, referring to Fig.12 The orthographic projection of the first sub-protrusion structure A1 on the base substrate 101 and the orthographic projection of the second sub-protrusion structure A2 on the base substrate 101 may both be rectangular. Furthermore, the length of the first sub-protrusion structure A1 may be equal to the length of the second sub-protrusion structure A2, and the width of the first sub-protrusion structure A1 may be equal to the width of the second sub-protrusion structure A2.

[0143] Among them, "approximately" means that an error range of less than 15% is allowed. For example, "approximately parallel" can mean that the angle between the two is between 0 degrees and 30 degrees, such as 0 degrees to 10 degrees, 0 degrees to 15 degrees, etc. "Approximately perpendicular" can mean that the angle between the two is between 60 degrees and 90 degrees, such as 80 degrees to 90 degrees, 75 degrees to 90 degrees. "Approximately equal" can mean that the length deviation of the two does not exceed 15%.

[0144] Fig.13 is a partial structural diagram of a display panel provided in an embodiment of the present application. Fig.13 The light emitting region of each first target sub-pixel 102a may have a symmetry axis N extending along the second direction W. The light emitting region of the first target sub-pixel 102a may refer to a region where a portion of the light emitting pattern a3 contacts both the electrode pattern a2 and the electrode layer a4.

[0145] The orthographic projection of the first sub-protrusion structure A1 on the base substrate 101 and the orthographic projection of the second sub-protrusion structure A2 on the base substrate 101 are substantially symmetrical with respect to the orthographic projection of the symmetry axis N on the base substrate 101. Fig.13 It can be seen that the orthographic projection of the first sub-protrusion structure A1 on the base substrate 101 and the orthographic projection of the second sub-protrusion structure A2 on the base substrate 101 are both located within the orthographic projection of the opening a51 in the pixel defining layer a5 on the base substrate 101 .

[0146] refer to Figure 6 and Fig.11 Each sub-pixel may further include: a source-drain electrode layer a6 located on a side of the planar layer a1 close to the base substrate 101. The source-drain electrode layer a6 may have a source-drain metal pattern. Fig.14 Schematic diagram of a source / drain metal pattern and a planar layer provided in an embodiment of the present application. Fig.14 The orthographic projection of the protruding structure A in each first target sub-pixel 102 a on the base substrate 101 may at least partially overlap with the orthographic projection of the source-drain metal pattern on the base substrate 101 .

[0147] Fig.15 Schematic diagram of a source-drain metal pattern provided in an embodiment of the present application. Fig.15 It can be seen that the source-drain metal pattern may include: a first pattern a61a and a second pattern a62a. The length of the first pattern a61a along the second direction W may be greater than the length of the first pattern a61a along the first direction Z. The length of the second pattern a62a along the second direction W may be greater than the length of the second pattern a62a along the first direction Z.

[0148] Fig.16is a schematic diagram of the structure of an electrode pattern provided in an embodiment of the present application. Fig.16 It can be seen that the length of the electrode pattern a2 along the second direction W is greater than the length of the electrode pattern a2 along the first direction Z. The electrode pattern a2 has a first edge portion a21 and a second edge portion a22 arranged along the first direction Z. Figures 15 to 17 The orthographic projection of the first edge portion a21 on the base substrate 101 overlaps with the orthographic projection of the first pattern a61a on the base substrate 101. The orthographic projection of the second edge portion a22 on the base substrate 101 overlaps with the orthographic projection of the second pattern a62a on the base substrate 101.

[0149] In the embodiment of the present application, the ratio of the maximum dimension of the protruding structure A in each first target sub-pixel 102a in the second plane to the maximum dimension of the protruding structure A in a direction perpendicular to the supporting surface of the base substrate 101 is greater than or equal to about 5 and less than or equal to about 20. The second plane is substantially parallel to the supporting surface.

[0150] Assuming that the shape of the orthographic projection of the protruding structure A in the first target sub-pixel 102a on the base substrate 101 is a rectangle, the maximum size of the protruding structure A in the first target sub-pixel 102a in the second plane may refer to the length of the rectangle. The maximum size of the protruding structure A in a direction perpendicular to the supporting surface of the base substrate 101 may refer to the thickness of the protruding structure A.

[0151] In the embodiment of the present application, the second sub-pixel 103 located in the plane display area 101b can usually emit light normally, and there is no need to design a convex structure A in the flat layer a1 of the second sub-pixel 103. Of course, the plurality of second sub-pixels 103 may include: at least one third target sub-pixel and at least one fourth target sub-pixel. Among them, the flat layer a1 of the third target sub-pixel may have a convex structure A. The maximum distance between the side of the flat layer a1 of the fourth target sub-pixel away from the base substrate 101 and the side of the flat layer a1 of the fourth target sub-pixel close to the base substrate 101 may be less than the maximum distance between the side of the flat layer a1 of the third target sub-pixel away from the base substrate 101 and the side of the flat layer a1 of the third target sub-pixel close to the base substrate 101.

[0152] The structure of the third target sub-pixel can refer to Figure 3 or Figure 4 The structure of the first target sub-pixel 102a in FIG. 1 and the structure of the fourth target sub-pixel can refer to Figure 3 or Figure 4 102 b in the second target sub-pixel 102 b.

[0153] The maximum distance between the surface of the flat layer a1 of the fourth target sub-pixel away from the substrate 101 and the surface of the flat layer a1 of the second target sub-pixel 102b close to the substrate 101 may refer to: the maximum length of the flat layer a1 of the fourth target sub-pixel along a direction perpendicular to the supporting surface of the substrate 101. The maximum distance between the surface of the flat layer a1 of the third target sub-pixel away from the substrate 101 and the surface of the flat layer a1 of the third target sub-pixel close to the substrate 101 may refer to: the maximum length of the flat layer a1 of the third target sub-pixel along a direction perpendicular to the supporting surface of the substrate 101.

[0154] Optionally, the flat layer a1 of the fourth target sub-pixel may not have the protruding structure A, so that the distance between the side of the flat layer a1 of the fourth target sub-pixel away from the substrate 101 and the side of the flat layer a1 of the fourth target sub-pixel close to the substrate 101 can be equal everywhere. In this case, the maximum length of the flat layer a1 of the fourth target sub-pixel along the direction perpendicular to the supporting surface of the substrate 101 is: the distance between the side of the flat layer a1 of the fourth target sub-pixel away from the substrate 101 and the side of the flat layer a1 of the fourth target sub-pixel close to the substrate 101.

[0155] In the embodiment of the present application, the distance between the side of the portion of the flat layer a1 other than the protruding structure A away from the substrate 101 and the side of the portion close to the substrate 101 is a fixed value. That is, when the flat layer a1 of the fourth target sub-pixel does not have the protruding structure A, the distance between the side of the portion of the flat layer a1 of the third target sub-pixel other than the protruding structure A away from the substrate 101 and the side of the portion close to the substrate 101 is equal to the maximum length of the flat layer a1 of the fourth target sub-pixel in the direction perpendicular to the bearing surface of the substrate 101. By designing the protruding structure A in the flat layer a1 of the third target sub-pixel, the maximum length of the flat layer a1 of the third target sub-pixel in the direction perpendicular to the bearing surface of the substrate 101 can be made greater than the maximum length of the flat layer a1 of the fourth target sub-pixel in the direction perpendicular to the bearing surface of the substrate 101.

[0156] Alternatively, the flat layer a1 of the fourth target sub-pixel may also have a convex structure A. However, the length of the convex structure A of the flat layer a1 of the fourth target sub-pixel in the direction perpendicular to the bearing surface of the base substrate 101 is less than the length of the convex structure A of the flat layer a1 of the third target sub-pixel in the direction perpendicular to the bearing surface of the base substrate 101. Thus, the maximum length of the flat layer a1 of the third target sub-pixel in the direction perpendicular to the bearing surface of the base substrate 101 can be greater than the maximum length of the flat layer a1 of the fourth target sub-pixel in the direction perpendicular to the bearing surface of the base substrate 101.

[0157] Optionally, the maximum size of the protrusion structure A of each third target sub-pixel in a direction perpendicular to the bearing surface of the base substrate 101 is smaller than the maximum size of the protrusion structure A of any first target sub-pixel 102a in a direction perpendicular to the bearing surface. That is, the thickness of the protrusion structure A of the first target sub-pixel 102a located in the curved display area 101a is greater than the thickness of the protrusion structure A of the third target sub-pixel located in the flat display area 101b.

[0158] Since the thicker the protruding structure A of the sub-pixel is, the easier it is for the light of the sub-pixel to be emitted, and since the light of the second sub-pixel 103 in the flat display area 101b is easier to be emitted than the light of the first sub-pixel 102 in the curved display area 101a, the thickness of the protruding structure A of the third target sub-pixel of the second sub-pixel 103 can be smaller than the thickness of the protruding structure A of the first target sub-pixel 102a.

[0159] refer to Figure 6 and Fig.11 It can also be seen that the sub-pixel may further include: an active layer a7 and a gate layer a8 stacked in sequence in a direction away from the base substrate 101. The active layer a7 and the gate layer a8 are insulated, and the write gate layer a8 and the source-drain electrode layer a6 are insulated. For example, the sub-pixel further includes a gate insulating layer a9 and a passivation layer a10, and the gate insulating layer a9 may be located between the active layer a7 and the gate layer a8, and the passivation layer a10 may be located between the gate layer a8 and the source-drain electrode layer a6.

[0160] The active layer a7 may include an active pattern a71, and the gate layer a8 may include a gate pattern a81 corresponding to the active pattern a71. The source-drain metal pattern in the source-drain layer a6 includes a source a61b and a drain a62b. The source a61b and the drain a62b are both connected to the active pattern a71, and the drain a62b is also connected to the electrode pattern a2 to provide a driving signal to the electrode pattern a2.

[0161] Optional, reference Fig.12 , the flat layer a1 of each sub-pixel may also have a via a13, and for each first target sub-pixel 102a, the orthographic projection of the via a13 on the base substrate 101 is separated from the orthographic projection of the protrusion structure A on the base substrate 101. That is, the orthographic projection of the via a13 on the base substrate 101 may not overlap with the orthographic projection of the protrusion structure A on the base substrate 101. The via a13 may be used to expose at least part of the drain a62b, and part of the electrode pattern a2 may be located in the via a13 to be connected to the exposed part of the drain a62b.

[0162] In summary, the embodiment of the present application provides a display panel, in which the electrode pattern of the first target sub-pixel is lifted up by the raised structure in the flat layer of the first target sub-pixel, and the orthographic projection of the part of the light-emitting pattern that contacts both the electrode pattern and the electrode layer on the base substrate covers the orthographic projection of the raised structure on the base substrate, so that the area in the display panel where the raised structure is provided can emit light normally. In addition, by designing a raised structure in the flat layer of the first target sub-pixel, it can be ensured that the light of the bent part of the display panel can be emitted normally, thereby avoiding the color deviation of the image displayed on the side of the display device, and the display effect of the display device is better.

[0163] Fig.18 is a flow chart of a method for preparing a display panel provided in an embodiment of the present application. The method can be used to prepare the display panel 10 provided in the above embodiment. Fig.18 , the method may include:

[0164] Step 201: Provide a substrate.

[0165] In the embodiment of the present application, a base substrate 101 may be provided first. The base substrate 101 may have a curved display area 101a and a flat display area 101b, and the curved display area 101a may be used for curved display. The base substrate 101 may be a flexible substrate.

[0166] Step 202 : forming a plurality of first sub-pixels in the curved display region of the base substrate, and forming a plurality of second sub-pixels in the flat display region of the base substrate.

[0167] In the examples of this application, refer to Figure 2 The two sub-regions (c1 and c2) included in the curved display region 101a are respectively the regions of the left and right edges of the base substrate 101, and the two sub-regions (c1 and c2) are respectively located on both sides of the flat display region 101b. Therefore, the plurality of first sub-pixels 102 formed can be located in the regions of the left and right edges of the base substrate 101, and the plurality of second sub-pixels 103 formed can be located in the region between the regions of the left and right edges of the base substrate 101. The plurality of first sub-pixels 102 include: at least one first target sub-pixel 102a and at least one second target sub-pixel 102b.

[0168] Among them, reference Fig.19 , forming the first sub-pixel 102 and the second sub-pixel 103 respectively includes:

[0169] Step 2021a: forming a planar layer on one side of the base substrate.

[0170] In the embodiment of the present application, the flat layer a1 of each sub-pixel can be prepared by a single patterning process. The flat layer a1 of the first target sub-pixel 102a in the formed first sub-pixel 102 can have a convex structure A. The maximum distance d2 between the side of the flat layer a1 of the second target sub-pixel 102b in the first sub-pixel 102 away from the substrate 101 and the side of the flat layer a1 of the second target sub-pixel 102b close to the substrate 101 is smaller than the maximum distance d1 between the side of the flat layer a1 of the first target sub-pixel 102a away from the substrate 101 and the side of the flat layer a1 of the first target sub-pixel 102a close to the substrate 101.

[0171] The maximum distance d2 between the side of the flat layer a1 of the second target sub-pixel 102b away from the substrate 101 and the side of the flat layer a1 of the second target sub-pixel 102b close to the substrate 101 may refer to: the maximum length of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the supporting surface of the substrate 101. The maximum distance d1 between the side of the flat layer a1 of the first target sub-pixel 102a away from the substrate 101 and the side of the flat layer a1 of the first target sub-pixel 102a close to the substrate 101 may refer to: the maximum length of the flat layer a1 of the first target sub-pixel 102a along the direction perpendicular to the supporting surface of the substrate 101.

[0172] Optionally, the flat layer a1 of the second target sub-pixel 102b may not have the protruding structure A, so that the distance between the side of the flat layer a1 of the second target sub-pixel 102b away from the substrate 101 and the side of the flat layer a1 of the second target sub-pixel 102b close to the substrate 101 can be equal everywhere. In this case, the maximum length d2 of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the supporting surface of the substrate 101 is: the distance between the side of the flat layer a1 of the second target sub-pixel 102b away from the substrate 101 and the side of the flat layer a1 of the second target sub-pixel 102b close to the substrate 101.

[0173] In the embodiment of the present application, the distance between the side of the portion of the flat layer a1 other than the protruding structure A away from the substrate 101 and the side of the portion close to the substrate 101 is a fixed value. That is, when the flat layer a1 of the second target sub-pixel 102b does not have the protruding structure A, the distance d3 between the side of the portion of the flat layer a1 of the first target sub-pixel 102a other than the protruding structure A away from the substrate 101 and the side of the portion close to the substrate 101 is equal to the maximum length d2 of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the bearing surface of the substrate 101. By designing the protruding structure A in the flat layer a1 of the first target sub-pixel 102a, the maximum length d1 of the flat layer a1 of the first target sub-pixel 102a along the direction perpendicular to the bearing surface of the substrate 101 can be made greater than the maximum length d2 of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the bearing surface of the substrate 101.

[0174] Alternatively, the flat layer a1 of the second target sub-pixel 102b may also have a convex structure A. However, the length of the convex structure A of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the bearing surface of the base substrate 101 is smaller than the length of the convex structure A of the flat layer a1 of the first target sub-pixel 102a along the direction perpendicular to the bearing surface of the base substrate 101. Thus, the maximum length d1 of the flat layer a1 of the first target sub-pixel 102a along the direction perpendicular to the bearing surface of the base substrate 101 can be greater than the maximum length d2 of the flat layer a1 of the second target sub-pixel 102b along the direction perpendicular to the bearing surface of the base substrate 101.

[0175] In the embodiment of the present application, the curved display area 101a of the base substrate 101 can constitute the curved portion of the display panel. Since the first target sub-pixel 102a in the first sub-pixel 102 located in the curved display area 101a has a convex structure A, the light emitted from the curved portion of the display panel 10 can be emitted normally, thereby ensuring the display effect of the display device. In addition, the flat display area 101b of the base substrate 101 can constitute the non-bending portion of the display panel. Under normal circumstances, the light emitted from the non-bending portion of the display panel can be emitted normally, so there is no need to adjust the angle of the light emitted from the non-bending portion of the display panel. As a result, the flat layer a1 of the second sub-pixel 103 located in the flat display area 101b may not have the convex structure A. Of course, the flat layer a1 of the second sub-pixel 103 may also have a convex structure A, which is not limited in the embodiment of the present application.

[0176] It should be noted that among the multiple second sub-pixels 103 formed, the flat layer a1 of each second sub-pixel 103 does not have the protruding structure A, or the flat layer a1 of some second sub-pixels 103 may have the protruding structure A, which is not limited in the embodiment of the present application.

[0177] Step 2022a: forming an electrode pattern on a side of the planar layer away from the base substrate.

[0178] In the embodiment of the present application, the electrode pattern a2 of each sub-pixel can be prepared by the same preparation process. In addition, the electrode pattern a2 of the sub-pixel is located on the side of the flat layer a1 of the sub-pixel away from the base substrate 101 .

[0179] For the first target sub-pixel 102a, the flat layer a1 of the first target sub-pixel 102a has a convex structure A, so the orthographic projection of the electrode pattern a2 of the first target sub-pixel 102a on the base substrate 101 can cover the orthographic projection of the convex structure A on the base substrate 101. That is, the entire surface of the convex structure A away from the base substrate 101 is in contact with the surface of the electrode pattern a2 close to the base substrate 101, or it can be understood that the portion where the convex structure A contacts the electrode pattern a2 is the entire surface of the convex structure A away from the base substrate 101.

[0180] Step 2023a: forming a light-emitting pattern on a side of the electrode pattern away from the base substrate.

[0181] In the embodiment of the present application, the light-emitting pattern a3 of each sub-pixel can be prepared by the same preparation process. In addition, the light-emitting pattern a3 of the sub-pixel is located on the side of the electrode pattern a2 of the sub-pixel away from the base substrate 101. The side of the light-emitting pattern a3 close to the base substrate 101 can be in contact with the side of the electrode pattern a2 away from the base substrate 101.

[0182] Step 2024a: forming an electrode layer on a side of the light-emitting pattern away from the base substrate.

[0183] In the embodiment of the present application, the electrode layer a4 of multiple sub-pixels can be shared, that is, the electrode layer a4 of multiple sub-pixels is an integrated structure. The electrode layer a4 of the sub-pixel can be located on a side of the light-emitting pattern a3 of the sub-pixel away from the base substrate 101, and the side of the light-emitting pattern a3 away from the base substrate 101 can be in contact with a side of the electrode layer a4 close to the base substrate 101.

[0184] Furthermore, for the first target sub-pixel 102a, the orthographic projection of the portion of the light-emitting pattern a3 in the first target sub-pixel 102a that contacts both the electrode pattern a2 and the electrode layer a4 on the base substrate 101 covers the orthographic projection of the protruding structure A of the flat layer a1 in the first target sub-pixel 102a on the base substrate 101. Since only the portion of the light-emitting pattern a3 that contacts both the electrode pattern a2 and the electrode layer a4 can emit light normally, the orthographic projection of the portion of the light-emitting pattern a3 that contacts both the electrode pattern a2 and the electrode layer a4 on the base substrate 101 covers the orthographic projection of the protruding structure A on the base substrate 101, which can ensure that the regions of the prepared display panel provided with the protruding structure A can emit light normally.

[0185] Fig. 20 is another flow chart of forming a first sub-pixel and a second sub-pixel provided by an embodiment of the present application. Fig. 20 , the method may include:

[0186] Step 2021b: forming an active layer, a gate insulating layer, a gate layer, a passivation layer and a source-drain layer in sequence on one side of the substrate.

[0187] In the examples of this application, refer to Fig.21 The active layer a7 may include an active pattern a71, and the gate layer a8 may include a gate pattern a81 corresponding to the active pattern a71. The source-drain electrode layer a6 may include a source electrode a61b and a drain electrode a62b, wherein the source electrode a61b and the drain electrode a62b are both connected to the active pattern a71.

[0188] Fig. 22 Schematic diagram of a source and drain layer of multiple sub-pixels provided in an embodiment of the present application. Fig.15 and Fig. 22 The source-drain metal pattern of the source-drain electrode layer a6 includes: a first pattern a61a and a second pattern a62a. The length of the first pattern a61a along the second direction W may be greater than the length of the first pattern a61a along the first direction Z. The length of the second pattern a62a along the second direction W may be greater than the length of the second pattern a62a along the first direction Z. And, referring to Fig. 22 The first pattern a61a in the source-drain metal pattern of the sub-pixels in the same column may be an integrated structure, and the second pattern a62a in the source-drain metal pattern of the sub-pixels in the same column may be an integrated structure.

[0189] Step 2022b: forming a planar layer on a side of the source and drain layer away from the substrate.

[0190] In the embodiment of the present application, the step of forming the planar layer a1 may include:

[0191] Step S1, forming a flat film layer on a side of the source and drain layer away from the base substrate.

[0192] Among them, reference Fig.23 The surface of the flat film layer e away from the base substrate 101 is a flat surface.

[0193] Step S2: coating photoresist.

[0194] Step S3: using a halftone mask to expose the photoresist.

[0195] Step S4, developing the photoresist.

[0196] Step S5, flattening the film layer to obtain a flat layer.

[0197] Fig.24 It is a schematic diagram of forming a flat layer provided in an embodiment of the present application. Fig.25 It is a top view of a flat layer provided in an embodiment of the present application. Fig.26 It is a schematic diagram of a source / drain layer and a planarization layer of multiple sub-pixels provided in an embodiment of the present application. Fig. 27 yes Fig.26 Cross-section along the AA direction. Figure 24 to Figure 27 The flat layer a1 has a plurality of protruding structures A on the side away from the base substrate 101 . The orthographic projection of the side of each protruding structure A away from the base substrate 101 on the base substrate 101 is located at the orthographic projection of the side of the protruding structure A close to the base substrate 101 on the base substrate 101 .

[0198] Optional, reference Figure 25 to Figure 27 The convex structure A in each first target sub-pixel 102a includes: a first sub-convex structure A1 and a second sub-convex structure A2 arranged along the first direction Z.

[0199] The length of the first sub-protrusion structure A1 along the second direction W may be greater than the length of the first sub-protrusion structure A1 along the first direction Z. The length of the second sub-protrusion structure A2 along the second direction W may be greater than the length of the second sub-protrusion structure A2 along the first direction Z. The second direction W may be substantially perpendicular to the first direction Z, and the first direction Z and the second direction W may both be substantially parallel to the supporting surface of the base substrate 101.

[0200] Optional, reference Figure 24 to Figure 27For each sub-pixel, the flat layer a1 of the sub-pixel may have a via a13. For the first target sub-pixel 102a, the projection of the via a13 in the flat layer a1 of the first target sub-pixel 102a on the base substrate 101 is separated from the orthographic projection of the protrusion structure A on the base substrate 101. The via a13 is used to expose at least part of the drain a62b of the first target sub-pixel 102a.

[0201] In the embodiment of the present application, the transmittance of the portion of the halftone mask corresponding to the portion of the planar layer a1 having the convex structure A is different from the transmittance of the portion of the halftone mask corresponding to the other portion of the planar layer a1 except the convex structure A.

[0202] The area where the protrusion structure A is located can be a non-exposed area, the area where the via a13 is located is a fully exposed area, and the other areas in the flat layer a1 except the area where the protrusion structure A and the second via a13 are located are semi-exposed areas.

[0203] When preparing the flat layer a1, the range of the semi-exposure area can be controlled to control the angle between the tangent of the peripheral area a12 of the protruding structure A and the side of the protruding structure A close to the base substrate 101, as well as the length of the orthographic projection of the peripheral area a12 of the protruding structure A on the base substrate 101 along the third direction X.

[0204] It should be noted that the third target sub-pixel included in the second sub-pixel 103 may also have a protruding structure A. Furthermore, the maximum size of the protruding structure A of each third target sub-pixel in a direction perpendicular to the carrying surface of the base substrate 101 is smaller than the maximum size of the protruding structure A of any first target sub-pixel 102a in a direction perpendicular to the carrying surface.

[0205] Step 2023b: forming an electrode pattern on a side of the planar layer away from the base substrate.

[0206] In the examples of this application, refer to Fig.28 and Fig.29 , an electrode pattern a2 may be formed on the side of the flat layer a1 away from the base substrate 101. A portion of the electrode pattern a2 is located in the via a13 to be connected to the drain a62b. Moreover, for a sub-pixel having a protruding structure A in the flat layer a1, the orthographic projection of the sub-pixel electrode pattern a2 on the base substrate 101 covers the orthographic projection of the protruding structure A on the base substrate 101.

[0207] refer to Fig.30 , the shape of the electrode pattern of the red sub-pixel, the shape of the electrode pattern of the green sub-pixel, and the shape of the electrode pattern of the blue sub-pixel are all different.

[0208] Step 2024b: forming a pixel defining layer on a side of the electrode pattern away from the base substrate.

[0209] In the examples of this application, refer to Fig.31 A pixel defining layer a5 may be formed on the side of the electrode pattern a2 away from the substrate 101 by means of a patterning process. The patterning process may include: photoresist (PR) coating, exposure, development, etching, photoresist stripping and other processes.

[0210] Fig.32 FIG. 1 is a schematic diagram of a pixel definition layer of multiple sub-pixels provided by an embodiment of the present application. Fig.32 The pixel defining layer a5 has an opening a51 corresponding to the electrode pattern a2, and the opening a51 can be used to expose at least part of the corresponding electrode pattern a2. Fig.33 For the first target sub-pixel 102a, at least the portion of the electrode pattern a2 exposed by the opening a51 includes a portion of the electrode pattern a2 overlapping with the protruding structure A.

[0211] Step 2025b: forming a light-emitting pattern on a side of the pixel defining layer away from the base substrate.

[0212] In the examples of this application, refer to Fig.34 , a light emitting pattern a3 may be formed on a side of the pixel defining layer a5 away from the base substrate 101. The light emitting pattern a3 may be located in the opening a51 of the pixel defining layer a5, and contact the portion of the electrode pattern a2 exposed by the opening a51. That is, a side of the light emitting pattern a3 close to the base substrate 101 may contact a side of the electrode pattern a2 away from the base substrate 101.

[0213] Step 2026b: forming an electrode layer on the side of the light-emitting pattern away from the base substrate.

[0214] In the examples of this application, refer to Figure 3 , an electrode layer a4 may be formed on a side of the light emitting pattern a3 away from the base substrate 101. The side of the light emitting pattern a3 away from the base substrate 101 is in contact with a side of the electrode layer a4 close to the base substrate 101.

[0215] Furthermore, for the first target sub-pixel 102a, the orthographic projection of the portion of the light-emitting pattern a3 in the first target sub-pixel 102a that contacts both the electrode pattern a2 and the electrode layer a4 on the base substrate 101 covers the orthographic projection of the protruding structure A of the first target sub-pixel 102a on the base substrate 101. Since only the portion of the light-emitting pattern a3 that contacts both the electrode pattern a2 and the electrode layer a4 can emit light normally, the orthographic projection of the portion of the light-emitting pattern a3 that contacts both the electrode pattern a2 and the electrode layer a4 on the base substrate 101 covers the orthographic projection of the protruding structure A on the base substrate 101, thereby ensuring that the regions of the prepared display panel provided with the protruding structure A can emit light normally.

[0216] In summary, the embodiment of the present application provides a method for preparing a display panel, wherein the electrode pattern of the first target sub-pixel in the display panel prepared by the method is lifted up by the raised structure in the flat layer of the first target sub-pixel, and the orthographic projection of the part of the light-emitting pattern that contacts both the electrode pattern and the electrode layer on the base substrate covers the orthographic projection of the raised structure on the base substrate, so that the area in the display panel where the raised structure is provided can emit light normally. In addition, by designing a raised structure in the flat layer of the first target sub-pixel, it can be ensured that the light of the bent part of the display panel can be emitted normally, thereby avoiding the color deviation of the image displayed on the side of the display device, and the display effect of the display device is better.

[0217] Fig.35 is a schematic diagram of the structure of a display device provided in an embodiment of the present application. Fig.35 It can be seen that the display device may include: a power supply component 30 and the display panel 10 provided in the above embodiment. The driving circuit 30 may be used to supply power to the display panel 10. The display device may be a curved display device.

[0218] Optionally, the display device can be an organic light-emitting diode (OLED) display panel, electronic paper, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame or navigator, or any other product or component with display function and fingerprint recognition function.

[0219] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A display panel, comprising: A base substrate, wherein the base substrate has a curved display area and a flat display area, and the curved display area is used for curved display; and a plurality of first sub-pixels located in the curved display area and a plurality of second sub-pixels located in the flat display area, wherein the first sub-pixels and the second sub-pixels respectively include: a flat layer, an electrode pattern, a light-emitting pattern, and an electrode layer sequentially stacked in a direction away from the base substrate; The plurality of first sub-pixels include: at least one first target sub-pixel and at least one second target sub-pixel, the planar layer of the first target sub-pixel having a convex structure, and a maximum distance between a side of the planar layer of the second target sub-pixel away from the substrate and a side of the planar layer of the second target sub-pixel close to the substrate is smaller than a maximum distance between a side of the planar layer of the first target sub-pixel away from the substrate and a side of the planar layer of the first target sub-pixel close to the substrate; Wherein, for the first target sub-pixel, the orthographic projection of the portion of the light-emitting pattern in the first target sub-pixel that contacts both the electrode pattern and the electrode layer on the base substrate, and the orthographic projection of the convex structure of the flat layer covering the first target sub-pixel on the base substrate; The raised structure of the flat layer in the first target sub-pixel has a middle area and a peripheral area, the angle between the tangent of the peripheral area of ​​the raised structure and the side of the raised structure close to the substrate is an acute angle, and the peripheral area of ​​the raised structure includes at least a first area and a second area relative to each other.

2. The display panel according to claim 1, characterized in that: The color of the light emitted by the at least one first target sub-pixel is different from the color of the light emitted by the at least one second target sub-pixel; The at least one first target sub-pixel includes a blue sub-pixel, and the at least one second target sub-pixel includes at least one of a red sub-pixel and a green sub-pixel.

3. The display panel according to claim 1, characterized in that: The at least one first target sub-pixel includes a blue sub-pixel, a red sub-pixel and a green sub-pixel; the convex structure of the planar layer in each of the first target sub-pixels has a middle area and a peripheral area; In a first plane perpendicular to the supporting surface of the base substrate, a first angle between a tangent line of a peripheral area of ​​the protruding structure in the blue sub-pixel and a surface close to the base substrate is greater than or equal to a second angle between a tangent line of a peripheral area of ​​the protruding structure in the red sub-pixel and a surface close to the base substrate.

4. The display panel according to claim 3, characterized in that: The first angle is greater than or equal to a third angle between a tangent line of a peripheral region of the protruding structure in the green sub-pixel and a surface close to the base substrate.

5. The display panel according to claim 4, characterized in that: The first angle is greater than or equal to 5 degrees and less than or equal to 40 degrees.

6. The display panel according to claim 5, characterized in that: The second angle and the third angle are both greater than or equal to 0 degrees and less than or equal to 40 degrees.

7. The display panel according to claim 5, characterized in that: The first angle ranges from 8 degrees to 12 degrees.

8. The display panel according to any one of claims 1 to 7, characterized in that: Each of the sub-pixels further comprises: a pixel defining layer located on a side of the electrode pattern away from the base substrate; the pixel defining layer has an opening, and at least a portion of the light emitting pattern of the sub-pixel is located in the opening; The slope angle of the opening of the pixel definition layer of each of the first target sub-pixels is smaller than the slope angle of the opening of the pixel definition layer of any of the second target sub-pixels; The slope angle of the opening of the pixel defining layer is the angle between the side surface of the opening of the pixel defining layer and a surface of the pixel defining layer close to the base substrate.

9. The display panel according to claim 8, characterized in that: The slope angle of the opening of the pixel defining layer of the blue sub-pixel in the display panel is smaller than the slope angle of the opening of the pixel defining layer of the red sub-pixel in the display panel, and smaller than the slope angle of the opening of the pixel defining layer of the green sub-pixel in the display panel.

10. The display panel according to any one of claims 1 to 7, characterized in that: The convex structure in each of the first target sub-pixels includes: a first sub-convex structure and a second sub-convex structure arranged along a first direction; The length of the first sub-protrusion structure along the second direction is greater than the length along the first direction, the length of the second sub-protrusion structure along the second direction is greater than the length along the first direction, the second direction is approximately perpendicular to the first direction, and the first direction and the second direction are approximately parallel to the supporting surface of the base substrate.

11. The display panel according to claim 10, characterized in that: The length of the first sub-protrusion structure along the first direction is substantially equal to the length of the second sub-protrusion structure along the first direction; The length of the first sub-protrusion structure along the second direction is substantially equal to the length of the second sub-protrusion structure along the second direction.

12. The display panel according to claim 11, characterized in that: The light emitting region of each of the first target sub-pixels has a symmetry axis extending along the second direction; An orthographic projection of the first sub-protrusion structure on the base substrate and an orthographic projection of the second sub-protrusion structure on the base substrate are substantially symmetrical with respect to an orthographic projection of the symmetry axis on the base substrate.

13. The display panel according to any one of claims 1 to 7, characterized in that: Each of the sub-pixels further comprises: a source-drain electrode layer located on a side of the planar layer close to the base substrate, the source-drain electrode layer having a source-drain metal pattern; The orthographic projection of the protruding structure in each of the first target sub-pixels on the base substrate at least partially overlaps with the orthographic projection of the source-drain metal pattern on the base substrate.

14. The display panel according to claim 13, characterized in that: The source-drain metal pattern includes: a first pattern and a second pattern; The length of the first pattern along the second direction is greater than the length of the first pattern along the first direction, and the length of the second pattern along the second direction is greater than the length of the second pattern along the first direction, the second direction is substantially perpendicular to the first direction, and the first direction and the second direction are both substantially parallel to the supporting surface of the base substrate; For the electrode pattern in each of the first target sub-pixels, the length of the electrode pattern along the second direction is greater than the length of the electrode pattern along the first direction, and the electrode pattern has a first edge portion and a second edge portion arranged along the first direction, the orthographic projection of the first edge portion on the substrate overlaps with the orthographic projection of the first pattern on the substrate, and the orthographic projection of the second edge portion on the substrate overlaps with the orthographic projection of the second pattern on the substrate.

15. The display panel according to any one of claims 1 to 7, characterized in that: The ratio of the maximum dimension of the protrusion structure in the second plane to the maximum dimension of the protrusion structure in the direction perpendicular to the supporting surface of the substrate in each of the first target sub-pixels is greater than or equal to 5 and less than or equal to 20; Wherein, the second plane is substantially parallel to the bearing surface.

16. The display panel according to any one of claims 1 to 7, characterized in that: The plurality of second sub-pixels include: at least one third target sub-pixel and at least one fourth target sub-pixel; The planar layer of the third target sub-pixel has a protruding structure, and the maximum distance between a side of the planar layer of the fourth target sub-pixel away from the substrate substrate and a side of the planar layer of the fourth target sub-pixel close to the substrate substrate is smaller than the maximum distance between a side of the planar layer of the third target sub-pixel away from the substrate substrate and a side of the planar layer of the third target sub-pixel close to the substrate substrate.

17. The display panel according to claim 16, characterized in that: The maximum dimension of the protruding structure of each of the third target sub-pixels in a direction perpendicular to the carrying surface of the substrate is smaller than the maximum dimension of the protruding structure of any of the first target sub-pixels in a direction perpendicular to the carrying surface.

18. The display panel according to any one of claims 1 to 7, characterized in that: The planar layer of each sub-pixel has a via hole; For each of the first target sub-pixels, an orthographic projection of the via hole on the base substrate is separated from an orthographic projection of the protrusion structure on the base substrate.

19. A method for preparing a display panel, characterized in that: The method comprises: forming a plurality of first sub-pixels in a curved display area of ​​a base substrate, and forming a plurality of second sub-pixels in a flat display area of ​​the base substrate, wherein the curved display area is used for curved display; Wherein, forming the first sub-pixel and the second sub-pixel respectively comprises: sequentially forming a planar layer, an electrode pattern, a light-emitting pattern, and an electrode layer in a direction away from the base substrate; The plurality of first sub-pixels include: at least one first target sub-pixel and at least one second target sub-pixel, the planar layer of the first target sub-pixel having a convex structure, and a maximum distance between a side of the planar layer of the second target sub-pixel away from the substrate and a side of the planar layer of the second target sub-pixel close to the substrate is smaller than a maximum distance between a side of the planar layer of the first target sub-pixel away from the substrate and a side of the planar layer of the first target sub-pixel close to the substrate; For the first target sub-pixel, the orthographic projection of a portion of the first target sub-pixel where the light emitting pattern contacts both the electrode pattern and the electrode layer on the base substrate covers the orthographic projection of the convex structure of the flat layer on the base substrate; The raised structure of the flat layer in the first target sub-pixel has a middle area and a peripheral area, the angle between the tangent of the peripheral area of ​​the raised structure and the side of the raised structure close to the substrate is an acute angle, and the peripheral area of ​​the raised structure includes at least a first area and a second area relative to each other.

20. The preparation method according to claim 19, characterized in that: Forming the planar layer of the first target sub-pixel on one side of the base substrate comprises: forming a flat film layer on one side of the substrate; Applying photoresist; Exposing the photoresist using a half-tone mask; developing the photoresist; Etching the flat film layer to obtain the flat layer; The light transmittance of the portion of the half-tone mask corresponding to the portion of the planar layer having the convex structure is different from the light transmittance of the portion of the half-tone mask corresponding to the other portion of the planar layer except the convex structure.

21. The preparation method according to claim 19 or 20, characterized in that: The color of the light emitted by the at least one first target sub-pixel is different from the color of the light emitted by the at least one second target sub-pixel; The at least one first target sub-pixel includes a blue sub-pixel, and the at least one second target sub-pixel includes a red sub-pixel and a green sub-pixel.

22. A display device, characterized in that: The display device comprises: a power supply component and a display panel according to any one of claims 1 to 18; The power supply component is used to supply power to the display panel.

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