CN110246872B

CN110246872B - Display panel and display device

Info

Publication number: CN110246872B
Application number: CN201910343043.2A
Authority: CN
Inventors: 林昶
Original assignee: Kunshan New Flat Panel Display Technology Center Co Ltd; Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan New Flat Panel Display Technology Center Co Ltd; Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2021-09-07
Anticipated expiration: 2039-04-26
Also published as: CN110246872A

Abstract

The invention provides a display panel and a display device, wherein the display panel comprises a light-emitting unit arranged on an array substrate and a thin film packaging layer positioned on the light-emitting unit, and further comprises: the thin film packaging structure comprises a plurality of filter layers and a black matrix, wherein the plurality of filter layers are arranged on the thin film packaging layer, the black matrix is used for separating the filter layers, a plurality of steps are arranged on the side face of the black matrix, and the plurality of steps are obliquely arranged outwards from the bottom end to the top end of the black matrix so that incident light irradiated on the steps is scattered. The display panel provided by the invention effectively increases scattering of external incident light, reduces direct reflection of the incident light, reduces the emergent amount of reflected light, further reduces the reflectivity of external environment light, ensures that the display effect of the display panel is better, and solves the problem that the display effect of the display panel is greatly influenced because the reflectivity of the external environment light is higher in the conventional panel.

Description

Display panel and display device

Technical Field

The invention relates to the technical field of display, in particular to a display panel and a display device.

Background

Display screens have been widely used in many fields such as portable electronic devices (e.g., mobile communication terminals, tablet computers, electronic books, and navigation devices) and large-screen electronic devices, wherein Organic Light-Emitting diodes (OLEDs) are increasingly used in display screens due to their advantages of low power consumption, high color saturation, wide viewing angle, thin thickness, and flexibility.

At present, in an OLED display screen, a Color Filter (CF) and a Black Matrix (BM) are specifically formed on a thin film encapsulation layer by adopting a BM-CF technique to replace a circular polarizer (because the polarizer is thick and hard), wherein the Black Matrix is used as a Color definition structure to shield light, the Color Filter is used for transmitting light with the same Color as the Color of the Color Filter, and when the Color Filter is arranged, the BM and the CF are often arranged on the thin film encapsulation layer, and the BM separates the CFs.

However, the display panel still has the problem of high reflection of ambient light, so that the display effect of the display panel is affected.

Disclosure of Invention

In order to solve at least one problem mentioned in the background art, the invention provides a display panel and a display device, which effectively increase the scattering of external incident light, reduce the emergent amount of reflected light, reduce the reflectivity of ambient light, and solve the problem that the display effect of the display panel is greatly influenced due to higher reflectivity of the external ambient light in the existing panel.

In order to achieve the above object, the present invention provides a display panel including a light emitting unit disposed on an array substrate and a thin film encapsulation layer on the light emitting unit, further including:

the thin film packaging structure comprises a plurality of filter layers and a black matrix, wherein the plurality of filter layers are arranged on the thin film packaging layer, the black matrix is used for separating the filter layers, a plurality of steps are arranged on the side face of the black matrix, and the plurality of steps are obliquely arranged outwards from the bottom end to the top end of the black matrix so that incident light irradiated on the steps is scattered.

The display panel provided by the invention further comprises a plurality of filter layers arranged on the film packaging layer and a black matrix used for separating the filter layers, wherein the side surface of the black matrix is provided with a plurality of steps, and the steps are obliquely arranged from the bottom end to the top end of the black matrix, so that the roughness of the side surface of the black matrix is larger, incident light is easy to scatter at the steps, and compared with the prior art, the direct reflection of the incident light is reduced, so that the emergent quantity of the reflected light is reduced, and further the reflectivity of external environment light is reduced, therefore, the display panel provided by the embodiment effectively increases the scattering of the external incident light, reduces the direct reflection of the incident light, so that the emergent quantity of the reflected light is reduced, further the reflectivity of the external environment light is reduced, and the display effect of the display panel is better, the problem of in the current panel because the reflectivity of external environment light is higher and cause display panel display effect to receive very big influence is solved.

In the display panel, optionally, the surfaces of the steps are roughened to form a plurality of first sawtooth structures protruding outwards.

In the above display panel, optionally, a surface of the thin film encapsulation layer, which is in contact with the filter layer, has a plurality of second saw-tooth structures.

In the above display panel, optionally, the filter layer has a concave-convex structure matching with the first sawtooth structure and the second sawtooth structure.

In the above display panel, optionally, a surface of at least one of the first sawtooth structure and the second sawtooth structure is provided with an anti-reflection coating.

In the above display panel, optionally, the antireflection coating includes: a first anti-reflective coating disposed on a surface of the first saw tooth structure.

In the above display panel, optionally, the anti-reflective coating further includes: a second anti-reflective coating disposed on the second sawtooth structure.

In the display panel, optionally, the inclination angle of the outward inclined arrangement of the plurality of steps is between 70 ° and 85 °.

In the above display panel, optionally, the step includes a first surface and a second surface, and a joint of the first surface and the second surface is an outwardly convex arc surface.

The invention also provides a display device comprising any one of the display panels.

The construction of the present invention and other objects and advantages thereof will be more apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic cross-sectional view of a conventional display panel;

fig. 2 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the invention;

fig. 3 is a schematic cross-sectional structure view of a part of a black matrix in a display panel according to an embodiment of the present invention;

fig. 4 is a schematic side view of a step on a black matrix in a display panel according to an embodiment of the invention;

fig. 5 is a schematic cross-sectional view of a display panel according to an embodiment of the invention;

fig. 6 is a schematic cross-sectional structure diagram of a display panel without a filter layer according to an embodiment of the invention;

fig. 7 is a schematic cross-sectional structure diagram of a filter layer in a display panel according to an embodiment of the invention.

Description of reference numerals:

10-an array substrate; 20-a light emitting unit; 21-a first electrode layer; 22-a second electrode layer;

23-an organic light-emitting layer; 30-a thin film encapsulation layer; 31-a second saw tooth structure;

40-black matrix; 41-a first saw tooth structure; 42-step; 421-a first surface;

422-a second surface; 423-cambered surface; 50-a filter layer; 51-relief structures;

50 a-a red filter layer; 50 b-green filter layer; 50 c-blue filter layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the embodiments of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection via an intermediary, a connection between two elements, or an interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example one

Fig. 2 is a schematic cross-sectional structure diagram of a display panel according to a first embodiment of the present disclosure, fig. 3 is a schematic cross-sectional structure diagram of a portion of a black matrix in the display panel according to the first embodiment of the present disclosure, fig. 4 is a schematic side view of a step on the black matrix in the display panel according to the first embodiment of the present disclosure, fig. 5 is a schematic cross-sectional structure diagram of the display panel according to the first embodiment of the present disclosure, and fig. 6 is a schematic cross-sectional structure diagram of the display panel according to the first embodiment of the present disclosure when no filter layer is provided. Fig. 7 is a schematic cross-sectional structure view of a filter layer in a display panel according to a first embodiment of the disclosure, and fig. 6 is a schematic cross-sectional structure view of a filter layer in a display panel according to a first embodiment of the disclosure.

The inventor of the present invention found in the actual research process that the current display panel has a problem of high ambient light reflectivity, and the inventor found that the reason for the problem is that: in the conventional display panel, a circular polarizer is used to eliminate reflection of the cathode surface to the external ambient light, but because the circular polarizer has a large thickness and is hard, which is not beneficial to bending, in order to reduce the thickness of the display panel and improve the bending performance, specifically, as shown in fig. 1, the display panel includes an array substrate, a plurality of light emitting units disposed on the array substrate, and a Thin-Film Encapsulation layer 200 (TFE) covering the light emitting units and the array substrate, each light emitting unit includes an anode layer, an organic light emitting layer (such as an organic light emitting layer 101, an organic light emitting layer 102, an organic light emitting layer 103) and a cathode layer 104 sequentially stacked on the array substrate, and a filter and a black matrix 300 are formed on the Thin-Film Encapsulation layer 200 by adopting the BM-CF technology to replace the circular polarizer, so that the display panel can be bent and reduced in thickness, but during the use, when the ambient light (as shown by the solid arrow in fig. 1) is irradiated onto the BM (black matrix 300), the BM absorbs the ambient light, so that the ambient light irradiated onto the BM cannot enter the inside of the display panel, but the ambient light enters from the CF (e.g., filter 401, filter 402, and filter 403), passes through the thin film encapsulation layer 200, is reflected at the cathode layer 104, and is emitted outward, where an incident path and a reflection path are shown by arrows in fig. 1, where the reflection path is an opposite path of the incident path, which causes all the incident light irradiated onto the filter to be reflected, so that the reflectivity of the ambient light is large, and the display effect of the display panel is affected.

Based on the above findings and the existing technical problems, the embodiments of the present invention provide the following solutions: referring to fig. 2 to 6, the present embodiment provides a display panel, which includes a plurality of light emitting units 20 disposed on an array substrate 10 and a thin film encapsulation layer 30 disposed on the light emitting units 20, wherein the light emitting units 20 specifically include a first electrode layer 21, a second electrode layer 22 and an organic light emitting layer 23 disposed between the first electrode layer 21 and the second electrode layer 22, wherein the organic light emitting layer 23 specifically includes a red organic light emitting layer R, a green organic light emitting layer G and a blue organic light emitting layer B, wherein adjacent organic light emitting layers 23 are separated by a pixel defining layer, in the present embodiment, one of the first electrode layer 21 and the second electrode layer 22 may be a cathode layer, and the other is an anode layer, in fig. 2, the second electrode layer 22 is a cathode layer, the first electrode layer 21 is an anode layer, in the present embodiment, the thin film encapsulation layer 30 specifically covers the second electrode layer 22, in this embodiment, the structure of the array substrate specifically refers to the existing array substrate structure, and in this embodiment, the structure and the working principle of the array substrate are not described in detail.

In this embodiment, the method further includes: as shown in fig. 2, the filter layer 50 specifically includes a red filter layer 50a, a green filter layer 50b, and a blue filter layer 50c, the red filter layer 50a is used for transmitting red light emitted from the red organic light emitting layer, and the rest of the light cannot be transmitted, the green filter layer 50b is used for transmitting green light emitted from the green organic light emitting layer, and the rest of the light cannot be transmitted, and the blue filter layer 50c is used for transmitting blue light emitted from the blue organic light emitting layer, and the rest of the light cannot be transmitted.

In this embodiment, adjacent filter layers 50 are separated by a black matrix 40, in order to reduce the reflectivity of external incident light, specifically, as shown in fig. 3, a side surface of the black matrix 40 has a plurality of steps 42, and the plurality of steps 42 are arranged obliquely outward from the bottom end to the top end of the black matrix 40, that is, in this embodiment, a side wall of the black matrix 40 has a plurality of steps 42, and the steps 42 are arranged sequentially obliquely from bottom to top, so that an outer contour of the black matrix 40 is finally made to be a tapered structure, a large end of the tapered structure is close to the film encapsulation layer 30, and a small end of the tapered structure faces upward, so when external incident light enters from the filter layer 50, a part of the incident light passes through the filter layer 50 and reaches the second electrode layer 22 of the light emitting unit 20 for reflection, when a part of the incident light projects onto the side surface of the black matrix 40, because the plurality of steps 42 are arranged on the side wall of the black matrix 40, therefore, the roughness of the side surface of the black matrix 40 is large, incident light is easy to scatter at the step 42, and direct reflection of the incident light is reduced, so that the emergent quantity of the reflected light is reduced, and the reflectivity of external environment light is reduced.

Therefore, in this embodiment, when the side of the black matrix 40 has a plurality of steps 42, and the steps 42 are sequentially arranged from bottom to top in an inclined manner, the scattering of the external incident light is effectively increased.

In this embodiment, when the black matrix 40 has a plurality of steps 42 on the side surface, the shape of the steps 42 includes, but is not limited to, the structure shown in fig. 3, in this embodiment, the surface of the steps 42 may be formed by connecting a horizontal surface and a vertical surface, or the surface of the steps 42 may be formed by connecting a horizontal surface and an inclined surface, or the surface of the steps 42 may be formed by inclined surfaces and vertical surfaces, in this embodiment, the structure of the steps 42 only needs to be capable of effectively increasing the scattering of the external incident light at the steps 42, in this embodiment, the plurality of steps 42 may be sequentially arranged next to each other from the bottom end to the top end of the black matrix 40, or the plurality of steps 42 may be sequentially arranged at intervals from the bottom end to the top end of the black matrix 40.

In this embodiment, when the side surface of the black matrix 40 has the step 42, the number of the steps 42 is specifically set according to actual conditions, and meanwhile, the shapes of the plurality of steps 42 may be the same, or the structures of some of the plurality of steps 42 may be the same, the structures of some of the steps may be different, or the shapes of the plurality of steps 42 are different, so that the side surface of the black matrix 40 forms an irregular step 42 shape, and thus the scattering effect of incident light is better.

In this embodiment, when the plurality of steps 42 are formed on the side surface of the black matrix 40, a halftone (halftone) mask process is specifically used to form the steps 42, it should be noted that in this embodiment, the steps 42 may also be formed by other etching processes, and in this embodiment, the process for forming the steps 42 is not limited.

Therefore, the display panel provided by the embodiment further includes a plurality of filter layers 50 disposed on the film encapsulation layer 30 and a black matrix 40 separating the filter layers 50, wherein the side surface of the black matrix 40 has a plurality of steps 42, and the plurality of steps 42 are obliquely arranged from the bottom end to the top end of the black matrix 40, so that the roughness of the side surface of the black matrix 40 is relatively large, and incident light is easy to scatter at the steps 42, compared with the prior art, the direct reflection of incident light is reduced, so that the outgoing amount of reflected light is reduced, and further the reflectivity of external ambient light is reduced, therefore, the display panel provided by the embodiment effectively increases the scattering of external incident light, reduces the direct reflection of incident light, so that the outgoing amount of reflected light is reduced, further the reflectivity of external ambient light is reduced, and the display effect of the display panel is better, the problem of in the current panel because the reflectivity of external environment light is higher and cause display panel display effect to receive very big influence is solved.

Further, on the basis of the above-mentioned embodiment, in the present embodiment, the surface of the plurality of steps 42 is roughened to form a plurality of outwardly protruding first sawtooth structures 41, and specifically, as shown in fig. 6, the plurality of steps 42 on the side surface of the black matrix 40 are roughened to form the first sawtooth structures 41, that is, in the present embodiment, the steps 42 on the side surface of the black matrix 40 are roughened to be sawtooth-shaped, and compared with the steps 42, the surface roughness of the first sawtooth structures 41 is larger, so that the scattering of the external incident light at the first sawtooth structures 41 is stronger, and the outgoing amount of the reflected light is greatly reduced, so that the reflectivity of the external incident light is reduced, thereby reducing the influence of the ambient light on the display effect of the display panel, wherein, in the present embodiment, because the plurality of steps 42 are inclined at the side surface of the black matrix 40, when the plurality of steps 42 are roughened to form the first sawtooth structure 41, the first sawtooth structure 41 is integrally inclined from bottom to top, and meanwhile, in this embodiment, it should be noted that, when the plurality of steps 42 are sequentially arranged next to each other, at this time, only the surfaces of the plurality of steps 42 need to be roughened to become the first sawtooth structure 41, and when the plurality of steps 42 are arranged at intervals on the side surface of the black matrix 40, at this time, the surfaces of the plurality of steps 42 and the side surface of the black matrix 40 where the steps 42 are not arranged are roughened together, and finally, the first sawtooth structure 41 is formed.

In this embodiment, when the surfaces of the steps 42 on the black matrix 40 are roughened, the surfaces of the steps 42 of the black matrix 40 may be chemically etched by a solution method, for example, by using a KOH + surfactant solution to form the first sawtooth structures 41.

Further, on the basis of the above-mentioned embodiment, in this embodiment, in order to reduce the reflectivity of the external incident light passing through the filter layer 50, specifically, in this embodiment, the surface of the thin film encapsulation layer 30 in contact with the filter layer 50 has a plurality of second saw-tooth structures 31, that is, the filter layer 50 has the second saw-tooth structures 31, and the second saw-tooth structures 31 are directed to the filter layer 50, so that when the external incident light passes through the filter layer 50 and reaches the surface of the second saw-tooth structures 31, the optical path of the incident light changes, the external incident light scatters at the second saw-tooth structures 31, so that the incident light is reflected to all directions, so as to reduce the direct reflection of the incident light by the second electrode layer 22 in the light emitting unit 20, and finally achieve the purpose of reducing the emergent amount of the reflected light, compared with the prior art, in this embodiment, by forming the second saw-tooth structures 31 on the thin film encapsulation layer 30, this effectively increases the scattering of the incident light passing through the filter layer 50 on the second saw-tooth structure 31, and reduces the reflectivity of the incident light from the outside, thereby reducing the influence of the reflected light from the outside on the display effect.

In this embodiment, when the roughening treatment is performed on the thin film encapsulation layer 30 to form the second sawtooth structure 31, a solution method is specifically used to chemically Etch a corresponding region on the thin film encapsulation layer 30, for example, a Buffered Oxide Etch (BOE) may be used to Etch the corresponding region to form the second sawtooth structure 31.

Therefore, in the present embodiment, the first saw-tooth structures 41 and the second saw-tooth structures 31 reduce direct reflection of incident light passing through the filter layer 50, and the incident light is scattered in the display panel, so that the emergent amount of the reflected light is reduced, the amount of the reflected light entering the eyes is reduced, and the normal display effect of the display panel is ensured.

Further, in the present embodiment, on the basis of the above-mentioned embodiments, when the first saw-tooth structures 41 and the second saw-tooth structures 31 are formed on the black matrix 40 and the film packaging layer 30, in order to make the filter layer 50 and the black matrix 40 and the film packaging layer 30 adhere to each other at this time, specifically, as shown in fig. 7, the filter layer 50 has the concave-convex structures 51 matched with the first saw-tooth structures 41 and the second saw-tooth structures 31, and the concave-convex structures 51 can be engaged with the first saw-tooth structures 41 and the second saw-tooth structures 31.

Further, on the basis of the above-mentioned embodiment, in the present embodiment, in order to further reduce the reflection of the incident light on the first sawtooth structure 41 and/or the second sawtooth structure 31, specifically, an anti-reflection coating (not shown) is provided on the surface of at least one of the first sawtooth structure 41 and the second sawtooth structure 31, and the anti-reflection coating is used for reducing the reflection of the incident light, so that when the incident light reaches the anti-reflection coating, the reflectivity of the incident light is reduced, so that under the operation action of the first sawtooth structure 41 and the anti-reflection coating, the reflection of the incident light is greatly reduced, and the emergent amount of the reflected light is further reduced, wherein in the present embodiment, the anti-reflection coating can be provided on the first sawtooth structure 41, and after the anti-reflection coating is provided, the structure of the anti-reflection coating corresponds to the first sawtooth structure 41, that is, the anti-reflection coating also has a sawtooth structure, that is, in this embodiment, the anti-reflective coating is only disposed on the surface of the first sawtooth structure 41, and the anti-reflective coating does not fill the concave portion of the first sawtooth structure 41, so as to ensure that the sawtooth structure still remains on the black matrix 40 after the anti-reflective coating is disposed, or in this embodiment, the anti-reflective coating may be disposed on the second sawtooth structure 31, and the anti-reflective coating corresponds to the second sawtooth structure 31 at this time, or the anti-reflective coating may be disposed on both the first sawtooth structure 41 and the second sawtooth structure 31, where in this embodiment, it should be noted that the anti-reflective coating can reduce the reflection of the external incident light at the anti-reflective coating, but does not affect the outward emission of the light generated by the light emitting unit 20. In this embodiment, the anti-reflective coating may be made of an inorganic material, or an organic material, for example, organosilane or resin.

Further, on the basis of the above embodiment, in this embodiment, the antireflection coating includes: and a first anti-reflection coating disposed on the surface of the first saw-tooth structure 41, the structure of the first anti-reflection coating matching with the first saw-tooth structure 41.

Further, on the basis of the above embodiment, in this embodiment, the anti-reflective coating further includes: and a second anti-reflection coating layer disposed on the second saw tooth structures 31, the structure of the second anti-reflection coating layer matching the second saw tooth structures 31.

Further, on the basis of the above embodiment, in the embodiment, as shown in fig. 3, the inclination angle a of the plurality of steps 42 arranged obliquely outward is between 70 ° and 85 °, and in the embodiment, for example, the inclination angle a may be 80 °.

Further, on the basis of the above embodiment, in this embodiment, as shown in fig. 4, the step 42 includes the first surface 421 and the second surface 422, and a joint of the first surface 421 and the second surface 422 is an outward convex arc 423, so that when incident light irradiates the arc 423, an optical path is changed, the incident light is diffusely reflected in various directions, and direct outward reflection of the incident light is reduced, so as to achieve the purpose of reducing reflectivity, wherein in this embodiment, the arrangement manner of the first surface 421 and the second surface 422 includes but is not limited to that shown in fig. 4, and in this embodiment, the first surface 421 and the second surface 422 may also be arranged in an inclined manner.

Example two

The second embodiment of the invention provides a display device, which can be an OLED display device, and any product or component with a display function, such as a television, a digital camera, a mobile phone, a tablet computer, an intelligent watch, an electronic book, a navigator and the like comprising the OLED display device.

In this embodiment, the display device includes the display panel of any one of the embodiments, and in this embodiment, the structure, function, and implementation of the display panel may refer to the detailed description in the embodiments, which is not repeated herein.

The display device that this embodiment provided, through including above-mentioned display panel, it is great to make the roughness of black matrix 40 side great like this, incident light easily takes place the scattering in step 42 department, compared with the prior art, the direct reflection of incident light has been reduced, thereby make the outgoing volume of reverberation reduce, and then the reflectivity of external environment light has been reduced, so, the display device that this embodiment provided, the scattering of external incident light has effectively been increased, the direct reflection of incident light has been reduced, thereby make the outgoing volume of reverberation reduce, and then the reflectivity of external environment light has been reduced, make display panel's display effect better, the problem that causes display panel display effect to receive very big influence because the reflectivity of external environment light is higher in having solved current display panel.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display panel, comprising a light emitting unit disposed on an array substrate and a thin film encapsulation layer disposed on the light emitting unit, further comprising:

a plurality of filter layers disposed on the thin film encapsulation layer and a black matrix for separating the filter layers, wherein the black matrix has a plurality of steps on a side surface thereof, and the plurality of steps are arranged obliquely outward from a bottom end to a top end of the black matrix;

the surfaces of the steps are roughened to form a plurality of first sawtooth structures protruding outwards.

2. The display panel according to claim 1, wherein a surface of the thin film encapsulation layer in contact with the filter layer has a plurality of second saw-tooth structures.

3. The display panel according to claim 2, wherein the filter layer has a concave-convex structure matching the first sawtooth structure and the second sawtooth structure.

4. The display panel according to claim 2, wherein a surface of at least one of the first sawtooth structure and the second sawtooth structure is provided with an anti-reflection coating.

5. The display panel of claim 4, wherein the anti-reflective coating comprises: a first anti-reflective coating disposed on a surface of the first saw tooth structure.

6. The display panel of claim 5, wherein the anti-reflective coating further comprises: a second anti-reflective coating disposed on the second sawtooth structure.

7. The display panel according to any one of claims 1 to 6, wherein the plurality of steps are arranged obliquely outward at an angle of 70 to 85 °.

8. The display panel according to any one of claims 1 to 6, wherein the step comprises a first surface and a second surface, and a junction of the first surface and the second surface is an outwardly convex arc.

9. A display device comprising the display panel according to any one of claims 1 to 8.