Display panel and display device

Abstract

The present application discloses a display panel and a display device, which relates to the technical field of display equipment. The display panel includes: an array substrate; a display array, located on one side of the array substrate; the display array includes a plurality of light-emitting elements; a transparent layer, located on the side of the display array away from the array substrate; the transparent layer includes a first area and a second area arranged in a first direction, and the first direction is parallel to the plane where the array substrate is located; a functional layer, covering the surface of the transparent layer away from the display array; the second area includes at least one protruding structure, and the surface of the protruding structure away from the array substrate is a curved surface protruding toward the side away from the array substrate; the surface of the first area away from the display array has a preset angle with the surface tangent of the curved surface on the side close to the first area, and the preset angle is less than 180°. Based on the protruding structure, the present application can improve the thickness uniformity of the transparent layer, and can improve the dark appearance effect and water and oxygen corrosion resistance of the display panel in the second area.

Description

Technical Field

[0001] The present application relates to the technical field of display devices, and in particular to a display panel and a display device. Background Art

[0002] With the continuous progress of science and technology, more and more display devices are widely used in people's daily life and work, bringing great convenience to people's daily life and work, and becoming an indispensable tool for people today. The main component of a display device to realize the display function is a display panel.

[0003] The display panel needs to use a liquid transparent material to form a transparent layer on the display side of the pixel. For example, the transparent layer can be formed on the display side by printing or coating. Since the liquid transparent material has fluidity, there is a difference in surface tension between the liquid transparent material located in the center area of ​​the display panel and the transparent material located at the edge of the display panel, which will cause the transparent layer in the edge area of ​​the display panel to have a gradient change with a gradually decreasing thickness. The transparent layer will form a leveling area with a gradually decreasing thickness at the edge of the display panel.

[0004] Since the transparent layer has a leveling area at the edge of the display panel, the thickness uniformity of the transparent layer is poorer as it approaches the edge of the display panel, which will affect the dark appearance of the display panel in the leveling area and the water and oxygen corrosion resistance. Summary of the invention

[0005] In view of the above problems, the present application provides a display panel and a display device, which can improve the thickness uniformity of the transparent layer in the edge area of ​​the display panel. The specific solution is as follows:

[0006] A first aspect of the present application provides a display panel, comprising:

[0007] An array substrate;

[0008] A display array is located on one side of the array substrate; the display array includes a plurality of light-emitting elements;

[0009] A transparent layer is located on a side of the display array away from the array substrate; the transparent layer includes a first region and a second region arranged in a first direction, and the first direction is parallel to the plane where the array substrate is located;

[0010] A functional layer covering a surface of the transparent layer facing away from the display array;

[0011] Among them, the second area includes at least one protruding structure, and the surface of the protruding structure on the side facing away from the array substrate is a curved surface that is convex toward the side facing away from the array substrate; the surface of the first area on the side facing away from the display array has a preset angle with the surface tangent of the curved surface on the side close to the first area, and the preset angle is less than 180°.

[0012] A second aspect of the present application provides a display device, comprising the above-mentioned display panel.

[0013] By means of the above technical solution, in the display panel and the display device provided by the present application, at least one protruding structure is arranged in the second area of ​​the display panel, the surface of the protruding structure on the side away from the array substrate is a curved surface protruding toward the side away from the array substrate, and the surface of the first area on the side away from the array substrate and the surface tangent of the curved surface near the first area have a preset angle of less than 180°. Based on the protruding structure, the span range of the thickness drop of the second area in the first direction can be reduced, the thickness difference between the second area and the first area can be compensated, and the thickness uniformity of the transparent layer in the entire display panel area can be improved. It can be seen that the technical solution of the present application can improve the thickness uniformity of the transparent layer based on the protruding structure, and can improve the dark appearance effect and water and oxygen corrosion resistance of the display panel in the second area. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0015] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which this application can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by this application, should still fall within the scope of the technical contents disclosed in this application.

[0016] Figure 1 is a cross-sectional view of a conventional display panel;

[0017] Figure 2 for Figure 1 A partially enlarged cross-sectional view of a transparent layer in the display panel is shown;

[0018] Figure 3 A cross-sectional view of a display panel provided in an embodiment of the present application;

[0019] Figure 4 for Figure 3 A partially enlarged cross-sectional view of a transparent layer in the display panel is shown;

[0020] Figure 5 A cross-sectional view of another display panel provided in an embodiment of the present application;

[0021] Figure 6 for Figure 5 A partially enlarged cross-sectional view of a transparent layer in the display panel is shown;

[0022] Figure 7 A cross-sectional view of another display panel provided in an embodiment of the present application;

[0023] Figure 8 for Figure 7 A partially enlarged cross-sectional view of a transparent layer in the display panel is shown;

[0024] Fig. 9 A partially enlarged cross-sectional view of a transparent layer in a display panel provided in an embodiment of the present application;

[0025] Fig.10 A cross-sectional view of another display panel provided in an embodiment of the present application;

[0026] Fig.11 for Fig.10 A partially enlarged cross-sectional view of a transparent layer in the display panel is shown;

[0027] Fig.12 A cross-sectional view of another display panel provided in an embodiment of the present application;

[0028] Fig.13 for Fig.12 A partially enlarged cross-sectional view of a transparent layer in the display panel is shown;

[0029] Fig.14 A cross-sectional view of another display panel provided in an embodiment of the present application;

[0030] Fig.15 for Fig.14 A partially enlarged cross-sectional view of a transparent layer in the display panel is shown;

[0031] Fig.16 A cross-sectional view of another display panel provided in an embodiment of the present application;

[0032] Fig.17 for Fig.16 A partially enlarged cross-sectional view of a transparent layer in the display panel is shown;

[0033] Fig.18 A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0034] Fig.19 A schematic diagram of the principle of increasing the light emission efficiency of a light emitting element based on the difference in refraction of a convex structure of a transparent layer provided in an embodiment of the present application;

[0035] Fig. 20A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0036] Fig.21 A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0037] Fig. 22 A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0038] Fig.23 A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0039] Fig.24 A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0040] Fig.25 A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0041] Fig.26 A cross-sectional view of another display panel provided in an embodiment of the present application;

[0042] Fig. 27 A cross-sectional view of another display panel provided in an embodiment of the present application;

[0043] Fig.28 A cross-sectional view of another display panel provided in an embodiment of the present application;

[0044] Fig.29 A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0045] Fig.30 A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0046] Fig.31 A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0047] Fig.32 A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0048] Fig.33 A partially enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application;

[0049] Fig.34 A schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0050] Reference numerals:

[0051] 11-array substrate; 12-display array; 121-light-emitting element; 13-transparent layer; 131-first area; 132-second area; 14-functional layer; 15-transparent glue layer; 161-first display area; 162-second display area; 171-first transparent layer; 172-second transparent layer; 181-first part; 182-second part; 191-first black glue layer; 192-second black glue layer; 193-third black glue layer; 20-display panel; X-first direction; Z-second direction; TL-tangent; A-boundary position; L1-first straight line; RS-convex structure; FS-first side; SS-second side; C-highest point; IF1-first interface; IF2-second interface. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the embodiments of the present application. It is known to those skilled in the art that with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0053] As described in the background technology, since the transparent layer has a leveling area at the edge of the display panel, the thickness uniformity of the transparent layer is poorer as it approaches the edge of the display panel, which will affect the dark appearance of the display panel in the leveling area and the water and oxygen corrosion resistance. The reasons for these problems can be as follows: Figure 1 shown.

[0054] refer to Figure 1 and Figure 2 , Figure 1 This is a cross-sectional view of a conventional display panel. Figure 2 for Figure 1 A partially enlarged cross-sectional view of a transparent layer in the display panel shown, wherein the display panel shown comprises:

[0055] An array substrate 11;

[0056] A display array 12 located on the surface of the array substrate 11, the display array comprising a plurality of light emitting elements 121;

[0057] A transparent layer 13 located on a side of the display array 12 away from the array substrate 11;

[0058] The functional layer 14 is located on the surface of the transparent layer 13 .

[0059] The transparent layer 13 is prepared on the surface of the display array 12 by using a liquid transparent material, and the transparent layer 13 can be prepared by coating or printing. The transparent layer 13 can be a transparent ink layer.

[0060] The transparent layer 13 includes a first area 131 and a second area 132 surrounding the first area 131. The first area 131 is located in the central area of ​​the display panel, has a relatively uniform thickness, and the upper surface of the first area 131 is a plane or approximately a plane. The second area 132 is located in the peripheral edge area of ​​the display panel, and due to the contraction effect of the surface tension, the upper surface of the second area 132 forms a curved surface that bends downward, forming a leveling area.

[0061] The upper surface of the first area 131 is smoothly connected to the upper surface of the second area 132. The surface of the first area 131 facing away from the display array 12 and the arc surface of the upper surface of the second area 132 are coplanar between the surface tangent TL on the side close to the first area 131, that is, at the boundary position A between the first area 131 and the second area 132, a straight line (defined as the first straight line L1) located in the upper surface of the first area 131 and parallel to the first direction X and the tangent TL of the upper surface of the second area 132 are located on the same straight line, so the angle between the upper surface of the first area 131 and the tangent TL of the second area 132 at the boundary position A is 180°. The first direction X is parallel to the plane where the array substrate 11 is located, and points from the first area 131 to the second area 132.

[0062] Since the angle between the surface tangent TL of the arc surface where the upper surface of the first region 131 and the upper surface of the second region 132 are located on the side close to the first region 131 is 180°, the thickness of the second region 132 is the largest at the end close to the first region 131 and the smallest at the end away from the first region 131.

[0063] exist Figure 1 The thickness of the second area 132 in the display panel shown decreases along the first direction X, the thickness at the left end of the second area 132 is the largest, and the thickness at the right end is the thinnest. The thickness difference span of the second area 132 is the length of the entire second area 132 in the first direction X, which will cause the functional layer 14 above the second area 132 to also bend along the upper surface of the second area 132, and the functional layer 14 and the transparent layer 13 form a curved interface in the second area 132.

[0064] When the display panel is in a dark state with a black screen, under the irradiation of strong external ambient light, the above curved interface will show the problem of uneven functional layer 14 above the second area 132. This is because the film layer above the second area 132 will also bend and deform with the second area, resulting in the angle of reflected light above this area being inconsistent with the angle of reflected light above the first area 131. This light inconsistency can be perceived by the human eye, causing the problem of visual flatness. In the scenario where multiple display panels are spliced ​​into a large-size display screen, this problem will be further aggravated at the splicing position between the display panels.

[0065] In addition, as the distance from the first area 131 increases, the thickness of the second area 132 will become thinner and thinner. Therefore, the closer to the edge area of ​​the display panel, the thinner the thickness of the transparent layer 13 is, resulting in weaker water and oxygen protection performance, making the display panel susceptible to water and oxygen corrosion, which will affect the reliability and service life of the display panel.

[0066] In a direction perpendicular to the plane where the array substrate 11 is located, when the second area 132 is aligned with the display array 12 as shown in FIG. Figure 1 As shown, when there is an overlapped part vertically, or the second area 132 overlaps with the driving circuit of the non-display area, or there is a driving circuit on the back of the display panel, and it is necessary to connect the circuit on the array substrate 11 below the second area 132 with the back driving circuit, it is impossible to ensure the overall flatness of the transparent layer 13 by cutting and removing the leveling area. This results in a large range of leveling areas on the display panel, and the size of the leveling area in the first direction X will reach 1.5mm or even larger, that is, the span of the second area 132 in the first direction X is large, which will affect the dark appearance of the display panel and the water and oxygen erosion resistance of the display panel. The direction perpendicular to the plane where the array substrate 11 is located is set as the second direction Z, and the second direction can be directed from the array substrate 11 to the transparent layer 13.

[0067] In order to solve the above problems, an embodiment of the present application provides a display panel, including:

[0068] An array substrate;

[0069] A display array is located on one side of the array substrate; the display array includes a plurality of light-emitting elements;

[0070] A transparent layer is located on a side of the display array away from the array substrate; the transparent layer includes a first region and a second region arranged in a first direction, and the first direction is parallel to the plane where the array substrate is located;

[0071] A functional layer covering a surface of the transparent layer facing away from the display array;

[0072] Among them, the second area includes at least one protruding structure, and the surface of the protruding structure on the side facing away from the array substrate is a curved surface that is convex toward the side facing away from the array substrate; the surface of the first area on the side facing away from the display array has a preset angle with the surface tangent of the curved surface on the side close to the first area, and the preset angle is less than 180°.

[0073] In the embodiment of the present application, at least one protruding structure is provided in the second area of ​​the display panel, the surface of the protruding structure on the side facing away from the array substrate is a curved surface protruding toward the side facing away from the array substrate, and the surface of the first area on the side facing away from the array substrate and the surface tangent of the curved surface near the first area have a preset angle of less than 180°. Based on the protruding structure, the span range of the thickness drop of the second area in the first direction can be reduced, the thickness difference between the second area and the first area can be compensated, and the thickness uniformity of the transparent layer in the entire display panel area can be improved. It can be seen that the technical solution of the present application is based on the protruding structure, which can improve the thickness uniformity of the transparent layer, and can improve the dark appearance effect and water and oxygen corrosion resistance of the display panel in the second area.

[0074] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0075] refer to Figure 3 and Figure 4 , Figure 3 A cross-sectional view of a display panel provided in an embodiment of the present application, Figure 4 for Figure 3 A partially enlarged cross-sectional view of a transparent layer in the display panel shown, wherein the display panel shown comprises:

[0076] An array substrate 11;

[0077] A display array 12, the display array 12 is located on one side of the array substrate 11; the display array 12 includes a plurality of light emitting elements 121; optionally, the display array includes at least a red light emitting element R, a green light emitting element G and a blue light emitting element B;

[0078] A transparent layer 13, the transparent layer 13 is located on a side of the display array 12 away from the array substrate 11; the transparent layer 13 includes a first area 131 and a second area 132 arranged in a first direction X, and the first direction X is parallel to the plane where the array substrate 11 is located; optionally, the first area 131 is close to the center of the display panel, the second area 132 includes at least one side edge area of ​​the display panel, and the second area 132 is located on a side of the first area 131 away from the center of the display panel;

[0079] The functional layer 14 covers the surface of the transparent layer 13 facing away from the display array 12; optionally, the functional layer 14 may be a protective layer for protecting the underlying film structure; further, the functional layer 14 may be an anti-glare film, which may reduce the light emission of the display panel screen and improve the visual comfort of the displayed image;

[0080] The second region 132 includes at least one protruding structure RS, and a surface of the protruding structure RS on a side away from the array substrate 11 is a curved surface protruding toward the side away from the array substrate 11, such as Figure 3 and Figure 4 As shown, the upper surface of the raised structure RS is an arc surface that bulges upward; a surface of the first region 131 that faces away from the display array 12 and a surface tangent TL of the arc surface of the raised structure RS near the first region 131 have a preset angle β, such as Figure 3 and Figure 4 As shown, a surface tangent line TL between the upper surface of the first region 131 and the curved surface of the protruding structure RS on the side close to the first region 131 has a preset angle β, and the preset angle β is less than 180°.

[0081] The arc surface of the raised structure RS includes a first side and a second side arranged in sequence along the first direction X. In the same raised structure RS, the first side of the arc surface is close to the first area 131, and the second side of the arc surface is far away from the first area 131. Figure 4 In the cross section shown in FIG. 1 , the arc surface of the protruding structure RS has a tangent line TL at a position close to the first side edge. Figure 3 and Figure 4 In the illustrated embodiment, the thickness of the first region 131 is uniform and constant, and the intersection line between the surface away from the array substrate 11 and the XZ plane is the first straight line L1, which is parallel to the plane where the first region 131 is located and extends along the first direction X. A preset angle β is formed between the first region 131 and a tangent line TL of the curved surface of the protruding structure RS close to the first region 131, so a preset angle β is formed between the first straight line L1 and the tangent line TL.

[0082] Since the preset angle β is less than 180°, for the same raised structure RS, the highest point C of the arc surface of the raised structure RS is located between the first side and the second side of the arc surface, and the highest point C of the arc surface does not coincide with the first side and the second side. Therefore, the maximum thickness position of the raised structure RS is located between the first side and the second side, and the thickness difference span range of the raised structure RS in the first direction X is smaller than the size of the raised structure RS in the first direction X.

[0083] As described above, Figure 1 and Figure 2 The thickness drop span range of the second region 132 is the length of the entire second region 132 in the first direction X. In the embodiment of the present application, the second region includes at least one protruding structure RS, and the thickness drop span range of the protruding structure RS in the first direction X is smaller than the size of the protruding structure RS in the first direction X. At least one protruding structure RS can be provided in the second region 132 to reduce the thickness drop width range of the second region 132, thereby compensating for the thickness difference between the second region 132 and the first region 131 and improving the thickness uniformity of the transparent layer 13 in the entire display panel area.

[0084] In addition, since the raised structure RS can improve the thickness uniformity of the second region 132, narrow the thickness difference width range of the second region 132, and improve the thickness uniformity of the transparent layer 13, the interface curvature of the functional layer 14 in the second region 132 can be reduced, and the appearance of the display panel in the dark state can be improved. At the same time, the influence of the thin thickness of the second region 132 on the water and oxygen corrosion resistance can be avoided.

[0085] Through the above description, in the embodiment of the present application, at least one protruding structure is provided in the second region 132, and because the preset angle β is less than 180°, the span range of the thickness drop of the second region 132 in the first direction X can be reduced, and the thickness difference between the second region 132 and the first region 131 can be compensated by the protruding structure RS, thereby improving the thickness uniformity of the transparent layer 13 in the entire display panel region. It can be seen that the technical solution of the present application can improve the thickness uniformity of the transparent layer 13 based on the protruding structure RS, and can improve the dark appearance effect and water and oxygen corrosion resistance of the display panel in the second region 132.

[0086] In one embodiment, if Figure 3 and Figure 4 As shown, the thickness of the first region 131 is uniform along the first direction X. At this time, the first region 131 is away from the side surface of the array substrate 11 ( Figure 3 The upper surface of the first region 131 in the display array 12 is a plane or a nearly plane, and the surface of the first region 131 is parallel to the plane where the array substrate 11 is located. The preset angle β between the surface of the first region 131 on the side away from the display array 12 and the surface tangent TL of the curved surface of the protruding structure RS on the side close to the first region 131 is the angle between the first straight line L1 parallel to the first direction X and the tangent TL.

[0087] refer to Figure 5 and Figure 6 , Figure 5 A cross-sectional view of another display panel provided in an embodiment of the present application, Figure 6 for Figure 5 The partially enlarged cross-sectional view of the transparent layer in the display panel shown in FIG. Figure 5 and Figure 6 In the display panel shown, the thickness of the portion of the first region 131 away from the second region 132 is uniform, and the thickness of the first region 131 gradually decreases at one end close to the second region 132. In this manner, since the thickness of the first region 131 gradually decreases at one end close to the second region 132, the intersection line of the surface of the first region 131 away from the array substrate 11 and the XZ plane includes a straight line and a curve smoothly connected to the straight line. At this time, the first straight line L1 is the tangent line of the surface of the first region 131 away from the array substrate 11 close to the second region 132.

[0088] In the embodiment of the present application, the first region 131 and the second region 132 are arranged adjacent to each other as an example for illustration. At this time, the first region 131 and the adjacent protruding structure RS have an intersection position A. In the cross-sectional view of the display panel parallel to the XZ plane, the preset angle β is the angle between the tangent line (first straight line L1) of the first region 131 at position A and the tangent line TL of the second region 132 at position A. If the thickness of the first region 131 is as Figure 3 and Figure 4 The thickness is uniform as shown in FIG. 1 . At this time, the first straight line L1 is parallel to the surface of the first region 131 facing away from the array substrate 11. If the thickness of the first region 131 is Figure 5 and Figure 6 As shown, the thickness of the first region 131 away from the second region 132 is uniform, and the thickness of the first region 131 gradually decreases near one end of the second region 132 . At this time, the first straight line L1 is the tangent of the first region 131 near the second region 132 .

[0089] like Figure 4 or Figure 6 As shown, in the second direction Z, the thickness of the first region 131 is h1, the distance between the highest point C in the arc surface of the protruding structure RS and the surface of the second region 132 facing the array substrate 11 is h, and h1 and h satisfy the following formula:

[0090]

[0091] Based on the above formula (1), the thickness deviation of h relative to h1 can be made not to exceed 20% h1, and the thickness h of the arc surface of the protruding structure RS at the highest point C can have a smaller difference with the thickness h1 of the first area 131, so that the thickness deviation between the second area 132 and the first area 131 can be compensated by the protruding structure RS, so that the thickness of the transparent layer 13 has better uniformity along the first direction X, and the overall flatness of the transparent layer 13 is improved, and it is avoided that the second area 132 has a large thickness difference relative to the first area 131, which affects the water and oxygen corrosion resistance and dark appearance of the display panel, and can improve the dark appearance of the display panel in the second area 132, and can also improve the water and oxygen corrosion resistance of the display panel.

[0092] In one embodiment, the Figure 4 or Figure 6 As shown, h1 may be the thickness of the first region 131 on the side close to the second region 132. Figure 4 As shown, the thickness of the first region 131 is uniform along the first direction X. At this time, the thickness of different positions of the first region 131 along the first direction X is h1 or approximately h1. Figure 6As shown, the thickness of the first region 131 at one end away from the second region 132 and the thickness of the middle region are uniform along the first direction X, and the thickness at any position is equal to or approximately equal to h1', h1'>h1, the thickness at the end close to the second region 132 gradually decreases from h1' to h1, and the thickness of the first region 131 on the side close to the second region 132 is h1.

[0093] In other embodiments, h1 may be the maximum thickness of the first region 131 .

[0094] refer to Figure 7 and Figure 8 , Figure 7 A cross-sectional view of another display panel provided in an embodiment of the present application, Figure 8 for Figure 7 The partially enlarged cross-sectional view of the transparent layer in the display panel shown in FIG. Figure 7 and Figure 8 In the display panel shown, along the first direction X, the second region 132 includes a plurality of protrusion structures RS. Figure 7 In the figure, the second region 132 includes two protruding structures RS as an example. In the display panel, the second region 132 can be set to include two or more protruding structures RS according to requirements. The embodiment of the present application does not limit the number of protruding structures RS in the second region 132. In this method, the thickness of the first region 131 is uniform along the first direction X. Obviously, it can also be Figure 6 Based on the shown method, the second region is provided with a plurality of continuously arranged protruding structures RS.

[0095] exist Figure 7 In the shown manner, by setting a plurality of protruding structures RS in the second region 132, the second region 132 can be divided into a plurality of sections, each section corresponds to a protruding structure RS, and the thickness difference of each protruding structure RS in the first direction X has a smaller span range than the size of the protruding structure RS in the first direction X. This can greatly reduce the thickness difference of the second region 132 in the first direction X, and can better improve the thickness uniformity of the second region 132, so that the surface of the second region 132 facing away from the array substrate 11 has better flatness.

[0096] When the second region 132 includes a plurality of protruding structures RS sequentially arranged along the first direction X, the plurality of protruding structures RS are sequentially arranged along the first direction from the first protruding structure RS1 to the nth protruding structure RS n , the first convex structure RS1 to the nth convex structure RS n The surface tangent lines TL of the arc surface on the side close to the first region 131 are the first tangent line TL1 to the nth tangent line TL n, n is a positive integer greater than 1. The first region 131 has a surface facing away from the display array 12 and an i-th protruding structure RS i The surface tangent line TL (the i-th tangent line TL) of the arc surface on the side close to the first region 131 i ) have an i-th preset angle β i , i is a positive integer not greater than n.

[0097] In one implementation of the embodiment of the present application, when the second region 132 includes a plurality of raised structures RS, along the first direction X, the arc surface of the raised structure RS has a first side FS and a second side SS arranged in sequence. The second region 132 has the first raised structure RS1 to the nth raised structure RS arranged in sequence along the first direction X. n , then along the first direction X, the arc surface of the i-th protrusion structure has first side edges FS arranged in sequence i and the second side SS i The jth raised structure RS j The second side SS j is the j+1th convex structure RS j+1 The first side FS j+1 The first side edge FS1 of the first protruding structure RS1 is the edge adjacent to the second region 132 and the first region 131 (corresponding to the intersection position A), and the nth protruding structure RS n The second side SS n is the side of the second region 132 away from one end of the first region 131 , and j is a positive integer less than n.

[0098] Take n=2 as an example, Figure 8 As shown, the second side SS1 of the first protruding structure RS1 is the first side FS2 of the second protruding structure RS2; the first side FS1 of the first protruding structure RS1 is the edge of the second region 132 adjacent to the first region 131, and the second side SS2 of the second protruding structure RS2 is the side of the second region 132 away from one end of the first region 131.

[0099] Optionally, in one embodiment, Figure 8 As shown, the nth protrusion structure RS n The second side SS n There may be a distance h3 between the second side edge SS2 of the second protruding structure RS2 and the surface of the transparent layer 13 facing the array substrate 11 . When n=2, there is a distance h3 between the second side edge SS2 of the second protruding structure RS2 and the surface of the transparent layer 13 facing the array substrate 11 .

[0100] refer to Fig. 9 , Fig. 9 This is a partially enlarged cross-sectional view of a transparent layer in a display panel provided in an embodiment of the present application. Based on the above implementation, Fig. 9 The method shown is the same as Figure 8 The difference between the methods shown is that Fig. 9 In the manner shown, the nth protruding structure RS n The second side SS n The distance between the n-th protrusion structure RS and the surface of the transparent layer 13 facing the array substrate 11 is 0. n The second side SS n Located on the surface of the transparent layer 13 facing the array substrate 11. Taking n=2 as an example, the second side SS2 of the second protruding structure RS2 is located on the surface of the transparent layer 13 facing the array substrate 11.

[0101] Based on the above description, when the second region 132 includes the first protruding structure RS1 to the nth protruding structure RS2 arranged in sequence along the first direction X, n When the first side edge FS1 of the first protruding structure RS1 is set to be the edge adjacent to the second region 132 and the first region 131; the nth protruding structure RS n The second side SS n The second side SS of the second region 132 is the side of the end away from the first region 131; in two adjacent protrusion structures 15, the second side SS of the previous protrusion structure 15 is the first side of the next protrusion structure 15. In this way, the arc surface of the protrusion structure RS is completely exposed on the side of the second region 132 away from the array substrate 11, and there is no overlapping part between the arc surfaces of the two adjacent protrusion structures RS in the second direction Z. If the second region 132 has a protrusion structure RS, the first side FS of the protrusion structure RS is the edge of the second region 132 adjacent to the first region 131, and the second side SS of the protrusion structure RS is the side of the end of the second region 132 away from the first region 131.

[0102] In the above embodiment, the first region 131 and the second region 132 of the transparent layer 13 may be made of the same material, the entire transparent layer 13 is an integral structure, and the protruding structures RS in the first region 131 and the second region 132 are an integral structure.

[0103] In any implementation of the embodiments of the present application, when the second region 132 has a plurality of protruding structures RS, relative to the plane where the array substrate 11 is located, in the second direction Z, the height difference between the highest points C of the two arc surfaces corresponding to the two protruding structures RS is less than 20 μm. At this time, the highest points C of the arc surfaces of each protruding structure RS have a smaller height difference, so that the highest points of each protruding structure RS have a relatively close height, and the second region 132 can have better flatness.

[0104] refer to Fig.10 and Fig.11 , Fig.10 A cross-sectional view of another display panel provided in an embodiment of the present application, Fig.11 for Fig.10 The partially enlarged cross-sectional view of the transparent layer in the display panel shown in FIG. Fig.10 and Fig.11 In the display panel shown, the functional layer 14 is bonded and fixed to the transparent layer 13 via the transparent adhesive layer 15 , and the height difference between the highest points C of the two arc surfaces corresponding to the two protruding structures RS does not exceed 10% of the thickness of the transparent adhesive layer 15 .

[0105] Fig.10 In the figure, the second region has two convex structures RS as an example for illustration. In the first direction X, the two convex structures RS are the first convex structure RS1 and the second convex structure RS2, respectively. The highest points C of the two convex surfaces are C1 and C2, respectively. The heights of the highest points C of the two convex surfaces are h1 and h2, respectively. RS1 and h RS2 , assuming the thickness of the transparent adhesive layer 15 is c, the following relationship is satisfied:

[0106]

[0107] In the above formula (2), c may be the maximum thickness of the transparent adhesive layer 15 .

[0108] exist Fig.10 In the shown manner, the height difference between the highest points C of the two arc surfaces does not exceed 10% of the thickness of the transparent adhesive layer 15. Relative to the thickness of the transparent adhesive layer 15, the height difference between the highest points C of the two raised structures RS is small. The height difference is small relative to the overall thickness of the transparent adhesive layer 15. Better flattening can be achieved through the transparent adhesive layer 15, so that the transparent adhesive layer 15 can provide a relatively flat bearing surface for the functional layer 14, and the functional layer 14 can have better flatness.

[0109] Optionally, based on any implementation of the embodiments of the present application, when the functional layer 14 is bonded and fixed to the transparent layer 13 by the transparent adhesive layer 15, in the second direction Z, the thickness of the first area 131 is h1; the distance between the highest point C of the arc surface and the surface of the second area 132 facing the array substrate 11 is h; the sum of the thickness of the first area 131 and the transparent adhesive layer 15 on the surface thereof is h2; wherein, h1≤h≤h2.

[0110] like Fig.10 and Fig.11 As shown, if n=2, the highest points C of the arc surfaces of the first protruding structure RS1 and the second protruding structure RS2 are C1 and C2 respectively, and the heights of the highest points C of the arc surfaces of the two are h RS1 and h RS2 ,h1≤h RS1 ≤h2,h1≤h RS2 ≤h2.

[0111] For the same protruding structure RS, setting h1≤h can make the average thickness of the protruding structure RS equal to or approximately equal to the thickness h1 of the first area 131, and setting h≤h2 can make the transparent adhesive layer 15 above the protruding structure RS and the transparent adhesive layer 15 above the first area 131 have a smaller height difference, so that the transparent adhesive layer 15 has better flatness, so as to provide a bearing surface with better flatness for the functional layer 14, and ensure that the functional layer 14 has good flatness.

[0112] refer to Fig.12 and Fig.13 , Fig.12 A cross-sectional view of another display panel provided in an embodiment of the present application, Fig.13 for Fig.12 The partially enlarged cross-sectional view of the transparent layer in the display panel shown in FIG. Fig.12 and Fig.13 In the display panel shown, the display array 12 includes: a first display area 161 and a second display area 162 arranged in a first direction X, the first area 131 covers the first display area 161, and the second area 132 covers the second display area 162; the transparent layer 13 includes: a first transparent layer 171 and a second transparent layer 172, the first transparent layer 171 covers a side surface of the first display area 161 away from the array substrate 11 and a side surface of the second display area 162 away from the array substrate 11, the second transparent layer 172 at least partially covers a side surface of the target area away from the array substrate 11, the portion of the first transparent layer 171 vertically opposite to the second display area 162 is the target area, the protruding structure 15 is located in the second transparent layer 172, and a first interface IF1 is provided between the first transparent layer 171 and the second transparent layer 172.

[0113] refer to Fig.14 and Fig.15 , Fig.14 A cross-sectional view of another display panel provided in an embodiment of the present application, Fig.15 for Fig.14 The enlarged cross-sectional view of the transparent layer in the display panel is shown in FIG. Fig.12 and Fig.13 The difference between the methods shown is that Fig.14 and Fig.15 In the display panel shown, the second region 132 includes a plurality of protruding structures RS, and each of the protruding structures RS is located on the second transparent layer 172 . Fig.14 and Fig.15 In the figure, the second region 132 having two protruding structures RS is taken as an example for illustration.

[0114] like Figure 12-Figure 15As shown, when the transparent layer 13 includes a first transparent layer 171 and a second transparent layer 172, the materials of the first transparent layer 171 and the second transparent layer 172 are different, and there is a first interface IF1 visible to the human eye, or a first interface IF1 invisible to the human eye. Since the materials of the first transparent layer 171 and the second transparent layer 172 are different, if the first interface IF1 between the two is invisible to the human eye, the existence of the first interface IF1 can be determined by optical detection.

[0115] exist Figure 12-Figure 15 In the manner shown, a first transparent layer 171 having a leveling area can be formed first, and then a second transparent layer 172 can be formed on the surface of the first transparent layer 171 at least above the second display area 162. The raised structure RS in the second transparent layer 172 can compensate for the height difference between the second area 132 and the first area 131 caused by the existence of the leveling area in the first transparent layer 171, and the flatness of the second area 132 and the flatness of the transparent layer 13 can be improved.

[0116] When the transparent layer 13 includes the first transparent layer 171 and the second transparent layer 172, if the second transparent layer 172 includes a plurality of protruding structures RS, an embodiment is as follows Fig.14 and Fig.15 As shown, in at least two convex structures RS arranged continuously along the first direction X, the arc surface of the previous convex structure RS has no overlapping part with the arc surface of the next convex structure RS. In this method, the materials of each convex structure RS can be set to be the same, and there is no first interface between each convex structure RS. In this method, the convex structure RS in the second transparent layer 172 can compensate for the height difference between the second area 132 and the first area 131 caused by the presence of the leveling area in the first transparent layer 171, and the flatness of the second area 132 and the flatness of the transparent layer 13 can be improved.

[0117] refer to Fig.16 and Fig.17 , Fig.16 A cross-sectional view of another display panel provided in an embodiment of the present application, Fig.17 for Fig.16 The partially enlarged cross-sectional view of the transparent layer in the display panel shown in FIG. Fig.16 and Fig.17 In the display panel shown, when the second area 132 includes multiple protruding structures RS, among at least two protruding structures RS arranged continuously along the first direction X, the latter protruding structure RS covers the local curved surface of the former protruding structure RS, so that the two adjacent protruding structures RS use the local curved surface as the second interface IF2 to form an overlapping portion.

[0118] Fig.16 and Fig.17In the illustrated manner, the second transparent layer 172 includes two protruding structures RS as an example for illustration, and the arc surfaces of the two protruding structures RS have an overlapping portion, so that the two form a second interface IF2 at the overlapping portion. In this manner, in two adjacent protruding structures RS along the first direction X, the arc surface of the latter protruding structure RS covers part of the arc surface of the former protruding structure RS, so that there is a second interface IF2 between the two adjacent arc surfaces, forming an overlapping portion, and avoiding that when the latter protruding structure RS completely exposes the arc surface of the former protruding structure RS, a deep depression is formed between the two adjacent arc surfaces, so as to improve the flatness of the surface of the second transparent layer 172 on the side away from the array substrate 11.

[0119] like Fig.17 As shown, for two adjacent raised structures RS, along the first direction X, the length of the arc surface of the local arc surface covered by the previous raised structure RS is b, and the length of the arc surface of the raised structure where the local arc surface is located is a; wherein b≤0.5*a, and / or, 0.1a≤*b. Fig.17 The second transparent layer 172 having two protruding structures RS is used as an example for illustration. Along the first direction X, the two protruding structures RS are respectively the first protruding structure RS1 and the second protruding structure RS2. The length of the first protruding structure RS1 in the first direction X is a, and the length of the local arc surface of the first protruding structure RS1 covered by the second protruding structure RS2 is b.

[0120] Based on the above implementation, in the embodiment of the present application, b≤0.5*a can be set to avoid a large overlap between the arc surfaces of two adjacent raised structures RS, resulting in the latter raised structure RS exceeding the previous raised structure RS by a large amount and affecting the flatness of the second region 132.

[0121] On the basis of the above implementation, in the embodiment of the present application, 0.1a≤*b can be set to avoid a large depth of depression between the arc surfaces of two adjacent protruding structures RS to affect the flatness of the second region 132 .

[0122] When the transparent layer 13 includes the first transparent layer 171 and the second transparent layer 172, if the materials of the protruding structures RS are the same, there is no second interface IF2 between adjacent protruding structures RS and there is no overlapping portion. If the materials of the protruding structures RS are different, there is a second interface IF2 between adjacent protruding structures RS and there is an overlapping portion, or there is no overlapping portion between two adjacent protruding structures RS, and the two have a relative third interface in the first direction X, and the third interface is parallel to the second direction Z.

[0123] Regardless of whether there is an overlapping portion between adjacent protruding structures RS, when the transparent layer 13 includes a first transparent layer 171 and a second transparent layer 172, after forming the first transparent layer 171 having a leveling area, the second transparent layer 172 having the protruding structure RS can be transferred to the leveling area of ​​the first transparent layer 171 to compensate for the thickness difference between the second area 132 and the first area 131, thereby improving the flatness of the second area 132 and improving the thickness uniformity of the transparent layer 13.

[0124] When the transparent layer 13 includes the first transparent layer 171 and the second transparent layer 172 , if the second region 132 includes a plurality of protruding structures RS, each protruding structure RS may be formed in sequence along the first direction X through multiple transfer processes.

[0125] refer to Fig.18 , Fig.18 This is a partial enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application. Based on the above implementation, Fig.18 In the manner shown, along the first direction X, the second transparent layer 172 has a plurality of the above-mentioned local curved surfaces arranged along the first direction X, that is, a plurality of raised structures RS each having a local curved surface covered by an adjacent subsequent raised structure RS, so that two adjacent raised structures RS form an overlapping portion in the second direction Z. Fig.18 In the figure, the second transparent layer 172 having three protruding structures RS is used as an example for illustration, and the three protruding structures RS are sequentially from the first protruding structure RS1 to the third protruding structure RS3 along the first direction X. The first protruding structure RS1 and the second protruding structure RS2 both have a partial arc surface covered by the adjacent next protruding structure RS.

[0126] In one embodiment, the arc length ratios of the local arc surfaces can be set to be the same, wherein the arc length ratio of the local arc surface is the ratio of the arc length of the local arc surface to the arc length of the protruding structure RS. Fig.18 In the embodiment shown, the length of the first protruding structure RS1 in the first direction X is a1, the length of the local arc surface of the first protruding structure RS1 covered by the second protruding structure RS2 is b1, and the arc surface ratio of the covered local arc surface in the first protruding structure RS1 is The length of the second protruding structure RS2 in the first direction X is a2, the length of the partial arc surface of the second protruding structure RS2 covered by the third protruding structure RS3 is b2, and the arc surface ratio of the covered partial arc surface in the second protruding structure RS2 is Can be set In this method, when there are multiple local curved surfaces, the curved surface length ratios of each local curved surface are set to be the same, and the curved surfaces of each protruding structure RS can have the same curved surface length ratio for process preparation, which facilitates the process preparation of multiple protruding structures RS in the second transparent layer 172.

[0127] In another embodiment, at least two local arc surfaces may have different arc length ratios. In this embodiment, the flatness of the surface of the second transparent layer 172 facing away from the array substrate 11 may be optimized by differentially designing the arc length ratios corresponding to the local arc surfaces, so as to further improve the flatness of the transparent layer 13 in the second region 132. Fig.18 In the method shown, you can set By differentially designing the first ratio and the second ratio, the flatness of the surface of the second transparent layer 172 facing away from the array substrate 11 is optimized.

[0128] If the second region 132 includes the first protrusion structure RS1 to the nth protrusion structure RS2 arranged in sequence along the first direction X, n , due to the nth convex structure RS n There is no other protruding structure RS, so at most n-1 protruding structures RS have a partial arc surface covered by the next protruding structure RS. When the arc surface length ratios of at least two partial arc surfaces are different, the arc surface length ratios of all partial arc surfaces in the second area 132 can be complementary and the same, or the length ratios of some partial arc surfaces can be different from each other.

[0129] In one implementation of the embodiment of the present application, in the first direction X, at least two continuously arranged convex structures RS in the second region 132 have a local arc surface, and in two adjacent convex structures RS, the arc surface length ratio corresponding to the previous convex structure RS is smaller than the arc surface length ratio corresponding to the next convex structure RS, so that Fig.18 Taking the method shown as an example, you can set

[0130] Before the first transparent layer 171 is solidified, due to the effect of the surface tension of the edge area, along the first direction X, the farther away from the first area 131, the greater the height difference of the second area 132 per unit length, and the convex structure RS away from the first area 131 needs to have a larger thickness at the highest point C of the arc surface to better compensate for the increasing height difference of the first transparent layer 171 along the first direction X. The arc surface length ratio corresponding to the previous convex structure RS is set to be smaller than the arc surface length ratio corresponding to the next convex structure RS, so that in two adjacent local arc surfaces, the later local arc surface needs to have a larger arc surface length ratio to better compensate for the increasing height difference of the first transparent layer 171 along the first direction X.

[0131] If the second region 132 includes the first protrusion structure RS1 to the nth protrusion structure RS n , the first convex structure RS1 to the n-1th convex structure RS n-1 Each of the two convex structures RS has a local arc surface covered by the next convex structure RS, and the jth convex structure RS can also be set j The arc length ratio is less than that of the j+1th convex structure RS j+1 In this way, the first protruding structure RS1 to the n-1th protruding structure RS n-1 Each of the two adjacent convex structures RS has a local curved surface covered by the next convex structure RS, which can avoid a deep depression between two adjacent convex structures RS, can better improve the surface flatness of the second transparent layer 172, and can also make the first convex structure RS1 to the n-1 convex structure RS n-1 The length proportions of the local arc surfaces in the image are increased successively, so that the subsequent local arc surfaces need to have a larger arc length proportion to better compensate for the increasing height difference of the first transparent layer 171 along the first direction X.

[0132] In one implementation of the embodiment of the present application, the first characteristic parameters of different convex structures RS can be set to be the same. The first characteristic parameters include: the refractive index of the convex structure RS, the length of the convex surface of the convex structure RS in the first direction X, the maximum thickness of the convex structure RS in the second direction Z, the radius of curvature of the convex surface, the maximum height of the convex surface of the convex structure RS relative to the second region 132 facing the surface of the array substrate 11, and any one of the convex surface length ratios of the local convex surface. In this manner, different convex structures RS are set to have the same first characteristic parameters, which facilitates the preparation of the convex structure RS based on the unified first characteristic parameters, facilitates the process preparation of the convex structure RS, and can reduce the difficulty of the process preparation of the display panel.

[0133] In one implementation of the embodiment of the present application, the first characteristic parameters of at least two protrusion structures RS may be different. In this way, by differentially designing the first characteristic parameters of the protrusion structures RS, the compensation effect of the first characteristic parameters of different protrusion structures RS on the surface flatness of the second transparent layer 172 may be optimized, so that the second transparent layer 172 has a better surface flatness effect.

[0134] Optionally, the first characteristic parameter may be the refractive index of the raised structure RS. In the first direction X, at least two continuously arranged raised structures RS in the second region 132 have a local curved surface, and in the two adjacent raised structures RS, the refractive index of the previous raised structure RS is less than the refractive index of the next raised structure RS. In this way, the two adjacent raised structures RS may form an overlapping portion on the local curved surface of the previous raised structure RS, and the two raised structures RS form a second interface IF2 in the overlapping portion, so that the second interface IF2 has a smaller refractive index on the side facing the array substrate 11, and has a larger refractive index on the side facing away from the array substrate 11, so that the light emission efficiency of the lower light emitting element 121 can be increased through the second interface IF2, thereby improving the brightness of the display panel and reducing energy consumption.

[0135] refer to Fig.19 , Fig.19 A schematic diagram of the principle of increasing the light emission efficiency of a light emitting element based on the difference in refraction of a protruding structure of a transparent layer provided in an embodiment of the present application, taking the overlapping portion between the first protruding structure RS1 and the second protruding structure RS2 as an example, the first protruding structure RS1 has a local curved surface covered by the second protruding structure RS2, and the first protruding structure RS1 and the second protruding structure RS2 have a second interface IF2 at the overlapping portion thereof, and since the refractive index of the first protruding structure RS1 is less than the refractive index of the second protruding structure RS2, for the light emitted by the light emitting element 121 (such as Fig.19 (as shown by the dotted arrow in the middle), when passing through the second interface IF2, the light enters the second convex structure RS2 with a larger refractive index from the first convex structure RS1 with a smaller refractive index, that is, the light enters the optically dense medium from the optically sparse medium, which can avoid the light from being totally reflected at the second interface IF2 and increase the light emission efficiency of the light emitting element 121 below.

[0136] refer to Fig. 20 , Fig. 20 This is a partial enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application. Based on the above implementation, Fig. 20 In the illustrated embodiment, the first characteristic parameter is the arc length of the protruding structure; in the first direction X, in at least two consecutively arranged protruding structures RS in the second region 132, the arc length of the first protruding structure RS is greater than the arc length of the second protruding structure RS. Fig. 20 As shown, any two adjacent protruding structures RS have a second interface IF2 between them, so that any two adjacent protruding structures RS have an overlapping portion in the second direction Z, and the arc length of each protruding structure RS along the first direction X decreases successively.

[0137] Fig. 20In the illustrated embodiment, the second transparent layer 172 includes three protruding structures RS as an example for illustration, and there is an overlapping portion between any two adjacent protruding structures RS in the second direction Z. Along the first direction X, the three protruding structures RS are respectively the first protruding structure RS1 to the third protruding structure RS3, and the arc lengths of the first protruding structure RS1 to the third protruding structure RS3 in the first direction X are respectively a1, a2, and a3, and a1>a2>a3.

[0138] refer to Fig.21 , Fig.21 This is a partial enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application. Based on the above implementation, Fig.21 In the illustrated embodiment, no second interface IF2 is provided between any two adjacent protrusion structures RS, so that any two adjacent protrusion structures RS have no overlapping portion in the second direction Z. In the first direction X, in at least two continuously arranged protrusion structures RS in the second region 132, the arc length of the preceding protrusion structure RS is greater than the arc length of the succeeding protrusion structure RS.

[0139] Alternatively, if Fig.21 As shown, any two adjacent protrusion structures RS have a second interface IF2 between them, so that any two adjacent protrusion structures RS have an overlapping portion in the second direction Z. The arc lengths of the protrusion structures RS along the first direction X may be arranged to decrease in sequence.

[0140] Fig. 20 In the illustrated embodiment, the second transparent layer 172 includes three protruding structures RS as an example for illustration, and there is an overlapping portion between any two adjacent protruding structures RS in the second direction Z. Along the first direction X, the three protruding structures RS are respectively the first protruding structure RS1 to the third protruding structure RS3, and the arc lengths of the first protruding structure RS1 to the third protruding structure RS3 in the first direction X are respectively a1, a2, and a3, and a1>a2>a3.

[0141] As described above, along the first direction X, the farther away from the first region 131, the greater the height difference of the second region 132 per unit length. Fig. 20 and Fig.21 In the manner shown, the raised structure RS away from the first area 131 can be set with a smaller arc length, so that more dense raised structures RS can be set in the area away from the first area 131, which can better compensate for the increasing height difference of the first transparent layer 171 along the first direction X, so as to better improve the flatness of the transparent layer 13.

[0142] refer to Fig. 22 , Fig. 22This is a partial enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application. Based on the above implementation, Fig. 22 In the illustrated embodiment, the first characteristic parameter is the maximum height of the protruding structure RS; the maximum height of the protruding structure RS is the maximum distance between the arc surface of the protruding structure RS and the first interface IF1 in the second direction Z. In the first direction X, in at least two continuously arranged protruding structures RS in the second region 132, the maximum thickness of the previous protruding structure RS is less than the maximum thickness of the next protruding structure RS. Optionally, along the first direction X, the maximum thickness of each protruding structure RS can be set to decrease in sequence.

[0143] Fig. 22 In the illustrated embodiment, the second transparent layer 172 includes three protruding structures RS as an example for illustration, and there is an overlapping portion between two adjacent protruding structures RS in the second direction Z, that is, any two adjacent protruding structures RS have a second interface IF2. Along the first direction X, the three protruding structures RS are sequentially the first protruding structure RS1 to the third protruding structure RS3, and the maximum thicknesses of the first protruding structure RS1 to the third protruding structure RS3 are t1, t2, and t3, respectively, and t1<t2<t3.

[0144] refer to Fig.23 , Fig.23 This is a partial enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application. Based on the above implementation, Fig.23 In the illustrated embodiment, no second interface IF2 is provided between any two adjacent protrusion structures RS, so that any two adjacent protrusion structures RS have no overlapping portion in the second direction Z. In the first direction X, in at least two continuously arranged protrusion structures RS in the second region 132, the maximum thickness of the preceding protrusion structure RS is less than the maximum thickness of the succeeding protrusion structure RS.

[0145] Fig.23 In the illustrated embodiment, the second transparent layer 172 includes three protruding structures RS as an example for illustration, and there is no overlapping portion between any two adjacent protruding structures RS in the second direction Z, that is, there is no second interface IF2 between any two adjacent protruding structures RS. Along the first direction X, the three protruding structures RS are sequentially the first protruding structure RS1 to the third protruding structure RS3, and the maximum thicknesses of the first protruding structure RS1 to the third protruding structure RS3 are t1, t2, and t3, respectively, and t1<t2<t3.

[0146] As described above, along the first direction X, the farther away from the first region 131, the greater the height difference of the second region 132 per unit length. Fig. 22 and Fig.23In the manner shown, in the first direction X, in at least two continuously arranged protruding structures RS in the second area 132, the maximum thickness of the previous protruding structure RS is less than the maximum thickness of the subsequent protruding structure RS, so that the increasing height difference of the first transparent layer 171 along the first direction X can be better compensated by the protruding structure RS with a larger thickness in the area far away from the first area 131, so as to better improve the flatness of the transparent layer 13.

[0147] refer to Fig.24 , Fig.24 This is a partial enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application. Based on the above implementation, Fig.24 In the manner shown, the first characteristic parameter is the radius of curvature of the raised structure RS; in the first direction X, in at least two consecutively arranged raised structures RS in the second region 132, the radius of curvature of the previous raised structure RS is greater than the radius of curvature of the next raised structure RS. Optionally, along the first direction, the radius of curvature of each raised structure RS can be set to decrease in sequence. Among them, if the arc surface corresponding to the raised structure RS is an arc on a section parallel to the XZ plane, the radius of curvature of the raised structure RS is the radius of the side of the arc, and if it is a non-arc curve, the radius of curvature of the raised structure RS is the maximum radius of curvature on the non-arc curve.

[0148] Fig.24 In the illustrated embodiment, the second transparent layer 172 includes three protruding structures RS as an example for illustration, and there is an overlapping portion between two adjacent protruding structures RS in the second direction Z, that is, any two adjacent protruding structures RS have a second interface IF2. Along the first direction X, the three protruding structures RS are sequentially the first protruding structure RS1 to the third protruding structure RS3, and the centers of curvature of the first protruding structure RS1 to the third protruding structure RS3 are sequentially O1, O2, and O3, and the radii of curvature are sequentially R1, R2, and R3, and R1>R2>R3.

[0149] refer to Fig.25 , Fig.25 This is a partial enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application. Based on the above implementation, Fig.25 In the illustrated manner, no second interface IF2 is provided between any two adjacent protrusion structures RS, so that any two adjacent protrusion structures RS have no overlapping portion in the second direction Z. In the first direction X, in at least two continuously arranged protrusion structures RS in the second region 132, the curvature radius of the preceding protrusion structure RS is greater than the curvature radius of the succeeding protrusion structure RS.

[0150] Fig.25In the illustrated embodiment, the second transparent layer 172 includes three protruding structures RS as an example for illustration, and there is no overlapping portion between any two adjacent protruding structures RS in the second direction Z, that is, there is no second interface IF2 between any two adjacent protruding structures RS. Along the first direction X, the three protruding structures RS are sequentially the first protruding structure RS1 to the third protruding structure RS3, and the centers of curvature of the first protruding structure RS1 to the third protruding structure RS3 are sequentially O1, O2, and O3, and the radii of curvature are sequentially R1, R2, and R3, and R1>R2>R3.

[0151] As described above, along the first direction X, the farther away from the first region 131, the greater the height difference of the second region 132 per unit length. Fig.24 and Fig.25 In the manner shown, in the first direction X, in at least two continuously arranged protruding structures RS in the second area 132, the curvature radius of the previous protruding structure RS is greater than the curvature radius of the subsequent protruding structure RS, so that the increasingly larger height difference of the first transparent layer 171 along the first direction X can be better compensated by the protruding structure RS with a larger curvature radius in the area far away from the first area 131, so as to better improve the flatness of the transparent layer 13.

[0152] Optionally, when the transparent layer 13 includes the first transparent layer 171 and the second transparent layer 172, on the basis of the above-mentioned embodiment, the refractive index of the second transparent layer 172 may be set to be greater than the refractive index of the first transparent layer 171. In this way, along the second direction Z, the refractive index of the first transparent layer 171 below the first interface IF1 is relatively small, and is a light-scarce medium, and the refractive index of the second transparent layer 172 above the first interface IF1 is relatively large, and is a light-dense medium. When the light emitted from the light emitting element 121 passes through the first interface IF1, it enters the second transparent layer 172 with a larger refractive index from the first transparent layer 171 with a smaller refractive index, that is, the light enters the light-dense medium from the light-scarce medium, which can avoid the total reflection of the light at the first interface IF1, and can increase the light emission efficiency of the light emitting element 121 below.

[0153] refer to Fig.26 , Fig.26 A cross-sectional view of another display panel provided in an embodiment of the present application, based on the above implementation, Fig.26In the illustrated embodiment, the first transparent layer 171 includes a first portion 181 and a second portion 182 arranged in sequence along the first direction X. The thickness of the first portion 181 is uniform along the first direction X, that is, the thickness of the first portion 181 at different positions in the first direction X is the same or approximately the same. The thickness of the second portion 182 decreases along the first direction X, that is, the second portion 182 is the leveling area of ​​the first transparent layer 171, and the thickness of the second portion 182 decreases along the first direction X. In the embodiment of the present application, the film thickness is the size of the film in the second direction Z.

[0154] like Fig.26 As shown, the second transparent layer 172 covers the second part 182, and also covers the partial area 183 adjacent to the first part 181 and the second part 182, so that the second transparent layer 172 can not only completely cover the leveling area of ​​the first transparent layer 171 where the thickness decreases along the first direction X, but also cover the partial area 183 of the first transparent layer 171 with uniform thickness adjacent to the leveling area, so as to avoid the first area 131 from having a depression at the boundary position A with the adjacent protruding structure RS on the side facing away from the array substrate 11, so that the transparent layer 13 has better flatness.

[0155] In other ways, you can Fig.12 As shown, the first area 131 and the first part 181 are arranged vertically opposite to each other in the second direction Z, and the second area 132 and the second part 182 are arranged vertically opposite to each other in the second direction Z. At this time, in the second direction Z, the second transparent layer 172 completely covers the second part 182 and has no overlapping part with the first part 181.

[0156] refer to Fig. 27 , Fig. 27 A cross-sectional view of another display panel provided in an embodiment of the present application, based on the above implementation, Fig. 27 In the illustrated embodiment, the functional layer 14 is bonded and fixed to the transparent layer 13 via the transparent adhesive layer 15; the thickness of the transparent adhesive layer 15 in the second direction Z is c; the width of the partial area 183 in the first direction X is d; wherein d≤0.05*c. As described above, c can be the maximum thickness of the transparent adhesive layer 15.

[0157] When the partial area 183 exists, although it can avoid that the first area 131 has a depression at the boundary position A on the surface of the side facing away from the array substrate 11 and the adjacent protruding structure RS, it will cause the height of the second transparent layer 172 above the partial area 183 to exceed the height of the first transparent layer 171, resulting in a larger thickness of the transparent layer 13 in the partial area 183. By setting d≤0.05*c, the width d of the partial area 183 can be smaller than the thickness c of the transparent adhesive layer 15, and the thickness of the transparent layer 13 in the partial area 183 can be flattened by the thicker transparent adhesive layer 15.

[0158] refer to Fig.28 , Fig.28 A cross-sectional view of another display panel provided in an embodiment of the present application is provided for the convenience of illustration. Fig.28 The film structure above the transparent layer 13 is not shown. Based on the above embodiment, Fig.28 In the illustrated embodiment, the protruding structure RS is multiplexed as a microlens, the optical axis of the microlens is inclined toward a side away from the first region 131 based on the second direction Z, and the optical axis intersects the light emitting element 121 below the second region 132 .

[0159] exist Fig.28 In the figure, the transparent layer 13 includes the first protruding structure RS1 to the third protruding structure RS3 arranged in sequence along the first direction X. The optical axes of the first protruding structure RS1 to the third protruding structure RS3 are OA1, OA2, and OA3 respectively, and the optical axes OA1, OA2, and OA3 are inclined toward the side away from the first area 131 based on the second direction Z, that is, each optical axis is inclined to the right based on the second direction Z.

[0160] The transparent raised structure RS can be used as a microlens, which has the function of adjusting light, and can deflect the light emitted by the light emitting element 121 along the tilted direction of the corresponding optical axis relative to the second direction Z. For the raised structure RS whose optical axis intersects with the light emitting element 121 below the second area 132, the raised structure RS can deflect the light emitted by the light emitting element 121 along the tilted direction of the intersecting optical axis relative to the second direction Z, which can improve the viewing angle range of the display panel in the edge area. Moreover, as described below, the angle range of the light emitted by the edge light emitting element 121 can be improved by the microlens.

[0161] The extension direction of the optical axis of each raised structure RS can be determined by an optical test method, such as using an optical instrument (optical microscope or high-precision camera, etc.) to observe and record the image displayed by the display panel based on the raised structure RS, and by analyzing the spot shape and position of the pixel points related to the raised structure RS in the image, the direction of the optical axis can be determined; or parallel light is used to pass through the raised structure RS to illuminate the light-emitting element 121 below, and by adjusting the incident direction of the light, the straight path of the light after it enters the raised structure RS and illuminates the light-emitting element 121 without deflection is determined, and the straight line on which the straight path is located is the direction of the corresponding optical axis; professional image processing and analysis software can also be used to process and analyze the model structure of the raised structure RS to determine the direction of the optical axis.

[0162] Alternatively, if Fig.28As shown, along the first direction X, the optical axes of different protrusion structures RS can be arranged to intersect with different light-emitting elements 121 below the second area 132 respectively; the optical axes of different protrusion structures RS do not intersect. Taking the transparent layer 13 including the first protrusion structure RS1 to the third protrusion structure RS3 arranged in sequence along the first direction X as an example, the optical axes OA1, OA2, and OA3 intersect with different light-emitting elements 121 respectively; and OA1, OA2, and OA3 do not intersect with each other. In this way, along the first direction X, the optical axes of each protrusion structure RS in the second area 132 can be made to correspond to different light-emitting elements 121 respectively, avoiding the problem of local concentration of light caused by the optical axes of multiple protrusion structures RS corresponding to one light-emitting element 121 at the same time, so that the display panel can have a more uniform display brightness in the second area 132.

[0163] In one implementation of the embodiment of the present application, on a straight line parallel to the first direction X, the portion of the display array 12 located below the second area 132 includes n light-emitting elements 121 arranged in sequence, the n light-emitting elements 121 are sequentially from the first light-emitting element to the nth light-emitting element, and the second area 132 includes n convex structures RS arranged in sequence, the n convex structures are sequentially from the first convex structure RS1 to the nth convex structure RS n ; Among them, the i-th protrusion structure RS i Optical axis OA i Intersects with the i-th light emitting element, where i is a positive integer not greater than n. Taking the transparent layer 13 including the first convex structure RS1 to the third convex structure RS3 sequentially arranged along the first direction X as an example, the optical axes OA1, OA2, and OA3 sequentially intersect with the first light emitting element to the third light emitting element in the second region 132. In this manner, for the plurality of light emitting elements 121 corresponding to the second region 132, along the first direction X, the plurality of light emitting elements 121 can be sequentially intersected with the first convex structure RS1 to the n-th convex structure RS n The optical axes of the display panel 132 intersect one by one, which can greatly improve the uniformity of the display brightness of the display panel in the second area 132.

[0164] refer to Fig.29 , Fig.29 This is a partial enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application. Based on the above implementation, Fig.29 In the illustrated method, along the first direction X, in the same raised structure RS, the first side FS and the second side SS have a connecting straight line L2, and the connecting straight line L2 and the arc surface of the raised structure RS form an arched structure; the second characteristic parameters of at least two arched structures are different. This method can optimize the effect of each raised structure RS on adjusting the flatness of the second region 132 by differentially designing the second characteristic parameters of the raised structure RS, and can better improve the flatness of the second region 132.

[0165] Optionally, the second characteristic parameter includes at least one of the area of ​​the arched structure, the chord height of the arched structure, the radius of curvature of the arc surface where the arched structure is located, and the extension direction of the straight line where the chord height is located (the optical axis direction of the microlens equivalent to the protruding structure RS).

[0166] exist Fig.29 In the illustrated manner, the second side SS of the previous convex structure RS is the first side FS of the next convex structure RS as an example for illustration, and the two convex structures RS have no overlapping parts in the second direction Z. When there is an overlapping part between two adjacent convex structures RS in the second direction Z and a second interface IF2 is provided between the two, along the first direction X, in the same convex structure RS, the first side FS and the second side SS also have a connecting straight line L2, and the connecting straight line L2 and the arc surface of the convex structure RS also form an arched structure; the second characteristic parameters of at least two arched structures can also be set to be different, so that the effect of each convex structure RS in adjusting the flatness of the second region 132 can be optimized by differentially designing the second characteristic parameters of the convex structures RS, and the flatness of the second region 132 can be better improved.

[0167] When the second characteristic parameters of at least two arch structures are different, in the first direction X, at least two arch structures arranged continuously in the second region 132 include at least one of the following methods:

[0168] Method 1: the area of ​​the first arched structure is smaller than the area of ​​the second arched structure;

[0169] Mode 2: the chord height of the previous arched structure is smaller than the chord height of the next arched structure; optionally, along the first direction X, the chord heights of the arched structures corresponding to the protruding structures RS can be set to increase in sequence;

[0170] Mode three, the curvature radius of the previous arched structure is greater than the curvature radius of the next arched structure; optionally, along the first direction X, the curvature radius of the arched structure corresponding to each protruding structure RS can be set to increase in sequence;

[0171] Method four: the angle between the chord height of the previous arched structure and the second direction Z is smaller than the angle between the chord height of the next arched structure and the second direction Z.

[0172] For the above-mentioned method 1, in the first direction X, among at least two consecutively arranged arch structures in the second region 132, the area of ​​the first arch structure is smaller than the area of ​​the second arch structure. In this method, when n=2, it can be as follows Fig.29As shown, along the first direction X, the area of ​​the arched structure of the first protruding structure RS1 is greater than the area of ​​the arched structure of the second protruding structure RS2. In this way, an arched structure with a larger area can be provided in an area away from the first area 131 to better compensate for the increasing height difference of the leveling area of ​​the transparent layer 13 in the first direction X, so as to better improve the flatness of the transparent layer 13. Optionally, along the first direction X, the area of ​​the arched structure corresponding to each protruding structure RS can be set to increase in sequence, so as to improve the flatness of the transparent layer 13 to a greater extent.

[0173] For the second method, in the first direction X, in at least two consecutively arranged arch structures in the second region 132, the chord height of the previous arch structure is smaller than the chord height of the next arch structure. In this method, when n=2, it can be as follows Fig.29 As shown, along the first direction X, the chord height CH1 of the first protruding structure RS1 is smaller than the CH2 of the second protruding structure RS2. In this way, an arched structure with a larger chord height can be provided in an area away from the first area 131 to better compensate for the increasing height difference of the leveling area of ​​the transparent layer 13 in the first direction X, so as to better improve the flatness of the transparent layer 13. Optionally, along the first direction X, the chord heights of the arched structures corresponding to the protruding structures RS can be set to increase in sequence, so as to improve the flatness of the transparent layer 13 to a greater extent.

[0174] refer to Fig.30 , Fig.30 This is another partially enlarged cross-sectional view of a transparent layer in a display panel provided in an embodiment of the present application. For the third method, in the first direction X, of at least two consecutively arranged arcuate structures in the second region 132, the curvature radius of the previous arcuate structure is greater than the curvature radius of the next arcuate structure. In this method, when n=2, it can be as follows Fig.30 As shown, along the first direction X, the radius of curvature R1 of the first protruding structure RS1 is greater than the radius of curvature R2 of the second protruding structure RS2. In this way, a smaller radius of curvature can be used in the area away from the first area 131 to better compensate for the increasing height difference of the leveling area of ​​the transparent layer 13 in the first direction X, so as to better improve the flatness of the transparent layer 13. Optionally, along the first direction X, the radius of curvature of the arched structure corresponding to each protruding structure RS can be set to decrease in sequence, so as to greatly improve the flatness of the transparent layer 13.

[0175] refer to Fig.31 , Fig.31This is another partially enlarged cross-sectional view of a transparent layer in a display panel provided in an embodiment of the present application. For the fourth method, in the first direction X, among at least two consecutively arranged arch structures in the second region 132, the angle between the chord height of the first arch structure and the second direction Z is smaller than the angle between the chord height of the second arch structure and the second direction Z. In this method, when n=2, it can be as follows Fig.31 As shown, along the first direction X, the angle between the chord height CH1 of the first protruding structure RS1 and the second direction Z is Q1, and the angle between the chord height CH2 of the second protruding structure RS2 and the second direction Z is Q2, Q1<Q2. In this way, in the area far away from the first area 131, a larger angle between the chord height and the second direction Z can be used to better compensate for the increasing height difference of the leveling area of ​​the transparent layer 13 in the first direction X, so as to better improve the flatness of the transparent layer 13. Optionally, along the first direction X, the angle between the chord height of each arched structure and the second direction Z can be set to increase in sequence, so as to greatly improve the flatness of the transparent layer 13.

[0176] refer to Fig.32 , Fig.32 This is a partial enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application. Based on the above implementation, Fig.32 In the display panel shown, the array substrate 11 has a third area 133 directly opposite to the first area 131 and a fourth area 134 directly opposite to the second area 132; the first black glue layer 191 and the second black glue layer 192 are sequentially stacked on the side wall of the fourth area 134 away from the third area 133. One end of the second black glue layer 192 is flush with the surface of the side of the array substrate 11 away from the display array 12, and the other end is flush with the surface of the side of the functional layer 14 away from the array substrate 11; the first black glue layer 191 is located between the side wall of the fourth area 134 away from the third area 133 and the second black glue layer 192, and extends from the side wall to between the second area 132 and the functional layer 14 to cover the edge portion of the surface of the second area 132 away from the array substrate 11; in the second direction Z, the first black glue layer 191 exposes the display array 12.

[0177] exist Fig.32 In the illustrated embodiment, a first black glue layer 191 and a second black glue layer 192 are stacked in sequence at one end of the display panel close to the second area 132, which can improve the water vapor corrosion resistance of the display panel at this end and improve the reliability and service life of the display panel.

[0178] Alternatively, if Fig.32As shown, the functional layer 14 can be bonded and fixed to the transparent layer 13 through a transparent adhesive layer 15, and the transparent adhesive layer 15 is also bonded and fixed to the surface of the first black adhesive layer 191 on one side facing the functional layer 14. Adjacent light emitting elements 121 can be isolated by a third black adhesive layer 193 to prevent crosstalk between light emitted by different light emitting elements 121, and can also reduce the reflection of ambient light on the surface of the array substrate 11, thereby improving display contrast.

[0179] In order to prevent the first black glue layer 191 from affecting the thickness uniformity of the second region 132, in the second direction Z, the height of the first black glue layer 191 located above the array substrate 11 is less than or equal to the arc height of the protruding structure RS (the height of the highest point C of the arc). Optionally, the height of the first black glue layer 191 located above the array substrate 11 is equal to or approximately equal to the arc height of the protruding structure RS, so that the second region 132 has better thickness uniformity.

[0180] refer to Fig.33 , Fig.33 A partial enlarged cross-sectional view of a transparent layer in another display panel provided in an embodiment of the present application, based on the above implementation manner, Fig.32 The difference between the methods shown is that Fig.33 The second area 132 of the display panel is provided with a plurality of convex ball structures RS. Fig.33 The example in which the second region 132 has the first protruding structure RS1 and the second protruding structure RS2 arranged in sequence is used for illustration.

[0181] As described above, the raised structure RS can be reused as a microlens, and the light emission angle of the edge light emitting element 121 of the display panel can be adjusted, so that the light emitted at a large angle by the edge light emitting element 121 can reduce the visibility of the first black glue layer 191 and the second black glue layer 192 in the display state, and achieve the first black glue layer 191 and the second black glue layer 192. This method can reduce the visibility of the black glue layer between two adjacent display panels when multiple display panels are spliced ​​into a large-size display screen, so as to achieve the black glue layer at the splicing position between adjacent display panels. The effect of eliminating the shadow.

[0182] In any implementation manner of the embodiments of the present application, the process of preparing the display panel includes:

[0183] First, a first transparent layer 171 is formed by a printing process on the side of the display array 12 away from the array substrate 11. The first transparent layer 171 is prepared on the surface of the display array 12 based on a liquid material. Due to the fluidity of the liquid material forming the first transparent layer 171 and the effect of the edge surface tension, along the first direction X, the first transparent layer 171 has a leveling area with a decreasing thickness in the edge area. The light-emitting element in the display array 12 can be a conventional LED or a micro LED, and the micro LED can be a Micro LED or a MiniLED.

[0184] The first transparent layer 171 may be prepared by any of the processes such as liquid dispensing, spraying, and printing. The embodiment of the present application does not limit the preparation process of the first transparent layer 171.

[0185] Then, a second transparent layer 172 is formed on the leveling area of ​​the first transparent layer 171 through a transfer process, and the second transparent layer 172 includes at least one protruding structure RS.

[0186] If the second transparent layer 172 includes a plurality of protruding structures RS, along the first direction X, each protruding structure RS is sequentially formed by a primary transfer process.

[0187] If the first transparent layer 171 and the second transparent layer 172 are made of the same material, there is no first interface IF1 between the first transparent layer 171 and the second transparent layer 172. When there are a plurality of protruding structures, there is no second interface IF2 between adjacent protruding structures RS.

[0188] If the materials of the first transparent layer 171 and the second transparent layer 172 are different, a first interface IF1 exists between the first transparent layer 171 and the second transparent layer 172. When there are multiple protruding structures, if the second transparent layer 172 uses the same material to prepare multiple protruding structures RS, there is no second interface IF2 between adjacent protruding structures RS; if adjacent protruding structures RS in the second transparent layer 172 use different materials, there is an interface between adjacent protruding structures RS, and when adjacent protruding structures RS have overlapping parts in the second direction Z, there is a second interface IF2 between the two.

[0189] Furthermore, after forming the second transparent layer 172, the functional layer 14 is adhered and fixed on the transparent layer 13, and the functional layer 14 can be bonded and fixed to the surface of the transparent layer 13 in a flat state through the transparent adhesive layer 15. Since the transparent adhesive layer 15 has a certain thickness, the height difference between the highest point C of the raised structure RS and other areas of the raised structure RS can be flattened. In this step, the transparent layer 13 can be horizontally facing downward and the functional layer 14 having the transparent adhesive layer 15 on the surface can be bonded and fixed. The functional layer 14 can be laid on a horizontal supporting plate, and a transparent adhesive layer 15 can be laid on the surface of the functional layer 14 to ensure that the functional layer 14 is in a flat state after being bonded and fixed to the transparent layer 13. At this time, as Fig.32 and Fig.33 As shown, there is a gap between the end of the second region 132 facing away from the first region 131 and the transparent adhesive layer 15 on the flattened surface of the functional layer 14 .

[0190] Among them, when the second area 132 has multiple protruding structures RS, the highest point C of the arc surface of the protruding structure RS (edge ​​protruding structure RS) farthest from the first area 131 exposes the edge light-emitting element 121, so that the edge of the subsequently formed first black glue layer 191 exposes the edge light-emitting element 121 of the display array 12 to avoid affecting the front-view output light of the display panel.

[0191] Furthermore, a first black glue layer 191 is formed on the side wall of the array substrate 11 corresponding to the above-mentioned gap, and the first black glue layer 191 covers the side wall and fills the gap, and is flush or approximately flush with the side wall of the functional layer 14 and the transparent glue layer 15 away from the first area 131. The first black glue layer 191 can not only fill the above-mentioned gap so that the functional layer 14 has better flatness in the second area 132, but also blacken the edge area of ​​the surface of the functional layer 14 on the side facing the array substrate 11, so as to further improve the unevenness of the display panel in the dark state that can be recognized by the human eye, and can also improve the white edge problem of the seam at the splicing position when multiple display panels are spliced ​​into a large-size display screen.

[0192] Finally, a second black glue layer 192 is formed on the surface of the first black glue layer 191 facing away from the array substrate 11, and the two ends of the second black glue layer 192 are respectively flush with the surface of the functional layer 14 facing away from the array substrate 11 and the surface of the array substrate 11 facing away from the functional layer 14. The second black glue layer 192 can blacken the side wall of the display panel facing away from the first area 131, thereby improving the bright line problem of the splicing seam of the spliced ​​screen.

[0193] Based on the display panel provided in the above embodiment, the embodiment of the present application further provides a display device, the display device is as follows: Fig.34 shown.

[0194] refer to Fig.34 , Fig.34 This is a schematic structural diagram of a display device provided in an embodiment of the present application, and the display device includes: at least one display panel 20 provided in the above embodiment.

[0195] If there are multiple display panels 20, the display panels 20 are spliced ​​on the same plane. The display device can be a display device used in any scene such as outdoor advertising, exhibition stage, smart city construction, commercial display and advertising, and smart home.

[0196] In the embodiment of the present application, the display device adopts the display panel 20 provided by the above embodiment, which can reduce the thickness difference between the edge leveling area and the central area of ​​the transparent layer 13, and improve the performance of the display panel 20 and the display device.

[0197] In the specification of this application, each embodiment is described in a progressive, parallel, or progressive and parallel manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The embodiments provided in the embodiments of this application can be combined with each other if there is no contradiction.

[0198] It should be noted that in the description of the present application, it should be understood that the description of the drawings and embodiments is illustrative rather than restrictive. The same reference numerals throughout the embodiments of the specification identify the same structure. In addition, for the sake of understanding and ease of description, the drawings may exaggerate the thickness of some layers, films, panels, regions, etc. It is also understood that when an element such as a layer, film, region, or substrate is referred to as "on" another element, the element may be directly on the other element or there may be an intermediate element. In addition, "on" refers to positioning an element on or below another element, but does not essentially refer to positioning on the upper side of another element according to the direction of gravity.

[0199] The terms "upper", "lower", "top", "bottom", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0200] It should also be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0201] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel, characterized in that: include: An array substrate; A display array is located on one side of the array substrate; the display array includes a plurality of light-emitting elements; a transparent layer, located on a side of the display array away from the array substrate; the transparent layer comprises a first region and a second region arranged in a first direction, wherein the first direction is parallel to a plane where the array substrate is located; A functional layer covering a surface of the transparent layer facing away from the display array; Wherein, the second area includes at least one protruding structure, and the surface of the protruding structure on the side facing away from the array substrate is a curved surface that is convex toward the side facing away from the array substrate; the surface of the first area on the side facing away from the display array has a preset angle with a surface tangent of the curved surface on the side close to the first area, and the preset angle is less than 180°.

2. The display panel according to claim 1, characterized in that: In the second direction, the thickness of the first region is h1, and the distance between the highest point of the arc surface and the surface of the second region facing the array substrate is h; the second direction is perpendicular to the plane where the array substrate is located; in, 3. The display panel according to claim 1, characterized in that: Along the first direction, the second region includes a plurality of the protruding structures.

4. The display panel according to claim 3, characterized in that: The display array comprises: a first display area and a second display area arranged in the first direction, the first area covers the first display area, and the second area covers the second display area; The transparent layer includes: a first transparent layer and a second transparent layer, the first transparent layer covers a side surface of the first display area facing away from the array substrate and a side surface of the second display area facing away from the array substrate, the second transparent layer at least partially covers a side surface of a target area facing away from the array substrate, a portion of the first transparent layer vertically opposite to the second display area is the target area, the protruding structure is located in the second transparent layer, and a first interface is provided between the first transparent layer and the second transparent layer.

5. The display panel according to claim 4, characterized in that: Among the at least two protrusion structures arranged continuously along the first direction, The latter convex structure covers the local arc surface of the former convex structure, so that the two adjacent convex structures use the local arc surface as the second interface to form an overlapping portion; Alternatively, the arc surface of the previous protruding structure has no overlapping portion with the arc surface of the next protruding structure.

6. The display panel according to claim 5, characterized in that: Along the first direction, the length of the arc surface of the local arc surface is b, and the length of the arc surface of the convex structure where the local arc surface is located is a; Among them, b≤0.5*a, and / or, 0.1a≤*b.

7. The display panel according to claim 5, characterized in that: Along the first direction, the second transparent layer has a plurality of local curved surfaces arranged along the first direction; The arc length ratios of the local arc surfaces are all the same, or the arc length ratios of at least two local arc surfaces are different; The arc surface length ratio of the local arc surface is the ratio of the arc surface length of the local arc surface to the arc surface length of the protruding structure.

8. The display panel according to claim 7, characterized in that: In the first direction, at least two of the protruding structures arranged continuously in the second area have the local arc surface, and among the two adjacent protruding structures, the arc surface length ratio corresponding to the previous protruding structure is smaller than the arc surface length ratio corresponding to the next protruding structure.

9. The display panel according to claim 5, characterized in that: The first characteristic parameters of at least two of the protrusion structures are different; Among them, the first characteristic parameter includes: the refractive index of the protruding structure, the arc length of the arc surface of the protruding structure in the first direction, the maximum thickness of the protruding structure in the second direction, the curvature radius of the arc surface, and any one of the arc length ratio of the local arc surface; the second direction is perpendicular to the plane where the array substrate is located.

10. The display panel according to claim 9, characterized in that: The first characteristic parameter is the refractive index of the protrusion structure; In the first direction, at least two of the protruding structures arranged continuously in the second region have the local curved surface, and of two adjacent protruding structures, the refractive index of the previous protruding structure is smaller than the refractive index of the next protruding structure.

11. The display panel according to claim 9, characterized in that: The first characteristic parameter is the arc length of the protruding structure; In the first direction, in at least two of the protruding structures arranged continuously in the second region, the arc length of the first protruding structure is greater than the arc length of the second protruding structure.

12. The display panel according to claim 9, characterized in that: The first characteristic parameter is the maximum thickness of the protruding structure; In the first direction, among at least two protrusion structures arranged continuously in the second region, the maximum thickness of a preceding protrusion structure is smaller than the maximum thickness of a succeeding protrusion structure.

13. The display panel according to claim 9, characterized in that: The first characteristic parameter is the radius of curvature of the protrusion structure; In the first direction, in at least two of the protruding structures arranged continuously in the second region, a curvature radius of a preceding protruding structure is greater than a curvature radius of a succeeding protruding structure.

14. The display panel according to claim 4, characterized in that: The refractive index of the second transparent layer is greater than the refractive index of the first transparent layer.

15. The display panel according to claim 4, characterized in that: The first transparent layer comprises a first portion and a second portion sequentially arranged along the first direction, the thickness of the first portion is uniform along the first direction, and the thickness of the second portion decreases along the first direction; The second transparent layer covers the second portion, and also covers a portion of the first portion adjacent to the second portion.

16. The display panel according to claim 15, characterized in that: The functional layer is bonded and fixed to the transparent layer through a transparent adhesive layer; the thickness of the transparent adhesive layer in the second direction is c; the second direction is perpendicular to the plane where the array substrate is located; The width of the partial area in the first direction is d; Among them, d≤0.05*c.

17. The display panel according to claim 3, characterized in that: Along the first direction, the arc surface has a first side edge and a second side edge arranged in sequence; The second region has a first protrusion structure to an nth protrusion structure arranged in sequence along the first direction, and the second side edge of the jth protrusion structure is the first side edge of the j+1th protrusion structure; The first side of the first protruding structure is the edge of the second region adjacent to the first region, and the second side of the nth protruding structure is the side of the second region away from one end of the first region; n is a positive integer greater than 1, and j is a positive integer less than n.

18. The display panel according to claim 3, 4 or 17, characterized in that: Relative to the plane where the array substrate is located, in the second direction, the height difference between the highest points of the two arc surfaces is less than 20 μm; the second direction is perpendicular to the plane where the array substrate is located; And / or, the functional layer is bonded and fixed to the transparent layer via a transparent adhesive layer, and the height difference does not exceed 10% of the thickness of the transparent adhesive layer.

19. The display panel according to claim 3, 4, or 17, characterized in that: The arc surface has a first side and a second side arranged in sequence; the protruding structure is reused as a microlens, the optical axis of the microlens is inclined toward a side away from the first area based on a second direction, and the optical axis intersects with the light-emitting element below the second area; The second direction is perpendicular to the plane where the array substrate is located.

20. The display panel according to claim 19, characterized in that: Along the first direction, optical axes of different protruding structures intersect with different light-emitting elements below the second area respectively; and optical axes of different protruding structures do not intersect with each other.

21. The display panel according to claim 20, characterized in that: On a straight line parallel to the first direction, the portion of the display array located below the second region includes n light-emitting elements arranged in sequence, the n light-emitting elements are sequentially from the first light-emitting element to the nth light-emitting element, and the second region includes n convex structures arranged in sequence, the n convex structures are sequentially from the first convex structure to the nth convex structure; The optical axis of the i-th protruding structure intersects with the i-th light-emitting element, and i is a positive integer not greater than n.

22. The display panel according to claim 3, 4, or 17, characterized in that: Along the first direction, in the same protruding structure, the first side and the second side have a connecting straight line, and the connecting straight line and the arc surface of the protruding structure form an arched structure; The second characteristic parameters of at least two of the arcuate structures are different; The second characteristic parameter includes at least one of the area of ​​the arched structure, the chord height of the arched structure, the radius of curvature of the arc surface where the arched structure is located, and the extension direction of the straight line where the chord height is located.

23. The display panel according to claim 22, characterized in that: In the first direction, at least two of the arch structures arranged continuously in the second region include at least one of the following methods: The area of ​​the first arched structure is smaller than the area of ​​the second arched structure; The chord height of the first arched structure is smaller than the chord height of the second arched structure; The radius of curvature of the first arched structure is greater than the radius of curvature of the second arched structure; The angle between the chord height of the first arched structure and the second direction is smaller than the angle between the chord height of the second arched structure and the second direction; the second direction is perpendicular to the plane where the array substrate is located.

24. The display panel according to claim 1, characterized in that: The functional layer is bonded and fixed to the transparent layer via a transparent adhesive layer; In the second direction, the thickness of the first region is h1; the distance between the highest point of the arc surface and the surface of the second region facing the array substrate is h; the sum of the thickness of the first region and the transparent adhesive layer on its surface is h2; Wherein, h1≤h≤h2; the second direction is perpendicular to the plane where the array substrate is located.

25. The display panel according to claim 1, characterized in that The array substrate has a a third area directly opposite to the second area and a fourth area directly opposite to the second area; A first black glue layer and a second black glue layer are sequentially stacked on a side wall of the fourth region facing away from the third region; One end of the second black glue layer is flush with a surface of the array substrate facing away from the display array, and the other end is flush with a surface of the functional layer facing away from the array substrate; The first black glue layer is located between the side wall and the second black glue layer, and extends between the second area and the functional layer based on the side wall to cover the edge portion of the second area on the surface facing away from the array substrate; in the second direction, the first black glue layer exposes the display array; the second direction is perpendicular to the plane where the array substrate is located.

26. The display panel according to claim 25, characterized in that: In the second direction, the height of the first black glue layer above the array substrate is less than or equal to the height of the curved surface.

27. A display device, characterized in that: include: At least one display panel according to any one of claims 1 to 26; If there are a plurality of display panels, the display panels are spliced ​​in a coplanar manner.

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