Display panel and display device

Abstract

The invention provides a display panel and a display device, belongs to the technical field of display, and aims to improve color separation diffraction. A flat layer; the pixel definition layer is arranged on the side, away from the driving substrate, of the flat layer, and the pixel definition layer is used for defining and forming a plurality of opening areas; the light-emitting layer is arranged on the side, away from the driving substrate, of the pixel defining layer and comprises a plurality of light-emitting units located in different opening areas; the first electrode layer is arranged on the side, away from the driving substrate, of the light emitting layer, the first electrode layer comprises a first main body part and a concave-convex part, the concave-convex part is arranged on the periphery of the opening area in a surrounding mode and is close to the opening area, and the surface, away from the driving substrate, of the concave-convex part is higher than or lower than the surface, away from the driving substrate, of the first main body part; the display panel at least comprises two concave-convex parts which are adjacently arranged, and orthographic projections of the two concave-convex parts on the driving substrate do not have translation symmetry.

Description

Technical Field

[0001] This application belongs to the field of display technology, and particularly relates to a display panel and a display device. Background Art

[0002] Compared with traditional LCD displays, Organic Light Emitting Diode (OLED) displays have many advantages such as a wide color gamut, bright colors, the ability to be curved, and full-screen capabilities, and thus have been recognized by the majority of the audience. Currently, the future development direction of OLED displays is the non-polarizer Pol-less technology that uses Colorfillter On Encapsulation (COE) technology to replace the polarizer. Compared with the polarizer (the thinnest commercially available is 67um), the total thickness of COE is about 5um, which can significantly reduce the thickness of the product and improve the bending characteristics of the product.

[0003] However, the OLED panel using COE is prone to obvious color separation diffraction patterns, seriously affecting the visual experience. Summary of the Invention

[0004] This application provides a display panel and a display device, which are used to solve the problem that the OLED panel in the prior art is prone to obvious color separation diffraction patterns.

[0005] In the first aspect of the embodiments of this application, a display panel is provided. The display panel includes:

[0006] A driving substrate;

[0007] A planarization layer disposed on one side of the driving substrate;

[0008] A pixel definition layer disposed on the side of the planarization layer away from the driving substrate. The pixel definition layer is used to define and form a plurality of opening regions;

[0009] A light-emitting layer disposed on the side of the pixel definition layer away from the driving substrate, including a plurality of light-emitting units located in different opening regions; and

[0010] A first electrode layer disposed on the side of the light-emitting layer away from the driving substrate. The first electrode layer includes a first main body portion and uneven portions. The uneven portions are disposed around the periphery of the opening region and close to the opening region. The surface of the uneven portion away from the driving substrate is higher or lower than the surface of the first main body portion away from the driving substrate;

[0011] Wherein, the display panel at least includes: the orthographic projections of two adjacent uneven portions on the driving substrate do not have translational symmetry.

[0012] In the second aspect of the embodiments of the present application, a display device is further provided. The display device includes: the display panel described in the first aspect of the embodiments of the present application.

[0013] The beneficial effects of the present application are as follows: For the display panel and the display device proposed in the embodiments of the present application, on the one hand, by providing a cathode layer with concave and convex portions, and the concave and convex portions surround the opening region. When external ambient light irradiates the display panel, due to the concave and convex portions, the surface of the cathode layer is uneven, and the reflected light generated by the cathode layer undergoes destructive interference in the region where the concave and convex portions are located, thereby improving color separation diffraction. On the other hand, at least two adjacent concave and convex portions in the display panel do not have translational symmetry in the orthographic projection on the driving substrate (that is, different in shape, size, or rotation angle in the plane), so that the diffraction patterns generated by the corresponding pixel units are different, and when the diffraction patterns are mixed, they become blurred, achieving a scattering effect.

[0014] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present application more obvious and understandable, the following specifically describes the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings. It should be noted that the ratios in the drawings are only for illustration and do not represent the actual ratios.

[0016] Figure 1 is a schematic structural diagram of a display panel in the embodiments of the present application;

[0017] Figure 2 is a schematic structural diagram of a first electrode layer in the embodiments of the present application;

[0018] Figure 3 is a schematic structural diagram of a pixel definition layer in the embodiments of the present application;

[0019] Figure 4 is a schematic structural diagram of another pixel definition layer in the embodiments of the present application;

[0020] Figure 5 is a schematic structural diagram of a planarization layer in the embodiments of the present application;

[0021] Figure 6It is a schematic diagram of a rotation angle in an embodiment of the present application;

[0022] Figure 7 It is a schematic diagram of the orthographic projection of a concavo-convex portion on a driving substrate in an embodiment of the present application;

[0023] Figure 8 It is another schematic diagram of the orthographic projection of a concavo-convex portion on a driving substrate in an embodiment of the present application;

[0024] Figure 9 It is a schematic diagram of the relative position between a concavo-convex portion and an opening region in an embodiment of the present application;

[0025] Description of the drawings: driving substrate 1, flat layer 2, pixel definition layer 3, light-emitting layer 4, first electrode layer 5, light-shielding layer 6, second electrode layer 7, thin-film encapsulation layer 8, touch layer 9, first organic layer 10, color filter 11, second organic layer 12;

[0026] Substrate 101, TFT array 102; fourth main body 201, flat layer boss 202; opening region 301, second main body 302, first protrusion 303, third main body 304, first depression 305; first main body 501, concavo-convex portion 502; light-shielding layer opening 601. Detailed implementation manners

[0027] To make the above objects, features, and advantages of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such terms can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are usually of the same type, and the number of objects is not limited. For example, the first object can be one or at least two. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0029] Compared with traditional LCD displays, OLED displays have many advantages such as wide color gamut, bright colors, curved surfaces, and full screens, so they have been recognized by a wide audience. At present, the Pol-less technology that uses COE to replace polarizers is the future development direction of OLED displays. Compared with polarizers (the thinnest commercially available is 67um), the total thickness of COE is about 5um, which can significantly reduce the thickness of the product and improve the bending characteristics of the product.

[0030] COE technology is a technology that directly encapsulates color filters on OLED panels. In traditional OLED displays, color filters and polarizers are separate components, while COE technology integrates the two together, simplifying the manufacturing process and improving the display effect. Polarizers are used in traditional OLED displays to reduce the reflection of ambient light, improve contrast and visibility. However, polarizers reduce the brightness of the display and increase power consumption. COE technology not only removes polarizers, but also further optimizes display performance by integrating color filters. It can provide higher brightness, lower power consumption and wider viewing angles, while simplifying the manufacturing process and reducing costs.

[0031] However, OLED panels using COE are prone to obvious color separation diffraction patterns, which seriously affects the visual experience. The color separation problem refers to the phenomenon that due to optical effects such as diffraction, interference or refraction of light, light of different wavelengths (corresponding to different colors) is deflected or separated to varying degrees when passing through the optical structure of the display, resulting in uneven colors or color stripes on the edges of the display. This phenomenon is usually related to the diffraction and interference of light, especially at the pixel level, where the propagation path and phase changes of light can cause certain colors to be enhanced or weakened.

[0032] In view of the above problems, the present application provides a display panel and a display device. On the one hand, a cathode layer with concave-convex portions is provided so that the concave-convex portions surround an opening area. When external ambient light is irradiated on the display panel, the surface of the cathode layer is uneven due to the concave-convex portions, and the reflected light generated by the cathode layer undergoes destructive interference in the area where the concave-convex portions are located, thereby improving color separation diffraction; on the other hand, the display panel includes at least two adjacent concave-convex portions whose orthographic projections on the driving substrate do not have translational symmetry (that is, the shapes, sizes or rotation angles on the plane are different), so that the diffraction patterns generated by the corresponding pixel units are different, and the diffraction patterns become blurred when mixed, thereby achieving a scattering effect.

[0033] In a first aspect, the present application proposes a display panel. The display panel proposed in the present application is described below through Sections 1.1 to 1.5.

[0034] 1.1. Improve color separation diffraction by utilizing the concavo-convex portion of the first electrode layer.

[0035] Reference Figure 1 , Figure 1 shows a schematic structural diagram of a display panel, as Figure 1 shown, the display panel includes:

[0036] A driving substrate;

[0037] A planarization layer disposed on one side of the driving substrate;

[0038] A pixel definition layer disposed on the side of the planarization layer facing away from the driving substrate, the pixel definition layer being used to define and form a plurality of opening regions;

[0039] A light-emitting layer disposed on the side of the pixel definition layer facing away from the driving substrate, including a plurality of light-emitting units located in different opening regions; and

[0040] A first electrode layer disposed on the side of the light-emitting layer facing away from the driving substrate, the first electrode layer including a first main body portion and an uneven portion, the uneven portion being disposed around the periphery of the opening region and close to the opening region, and the surface of the uneven portion facing away from the driving substrate being higher or lower than the surface of the first main body portion facing away from the driving substrate;

[0041] Wherein, the display panel at least includes: the orthographic projections of two adjacent uneven portions on the driving substrate do not have translational symmetry.

[0042] As Figure 1 shown, the driving substrate 1, the planarization layer 2, the pixel definition layer 3, the light-emitting layer 4, and the first electrode layer 5 are sequentially disposed along the thickness direction of the display panel. Specifically, the driving substrate 1 includes: a substrate 101, and a TFT array 102 (formed by a plurality of thin film transistors (TFTs) and forming an array) on the surface on one side of the substrate. Among them, the substrate can be, for example, the substrate 11 is a silicon substrate, or a flexible substrate such as polyimide can also be used. The TFT array can be disposed between the substrate and the planarization layer 2, and the TFT array is electrically connected to the light-emitting layer 4 to provide an electrical signal to the light-emitting units in the light-emitting layer 4 and drive the light-emitting units to emit light.

[0043] In the process of manufacturing the display panel, after the TFT array is first fabricated on the substrate, a planarization layer 2 is provided on the side of the TFT array away from the driving substrate 1 through a planarization process (PLN). The purpose of the planarization process is to planarize the surface after the TFT array is fabricated, so as to eliminate the unevenness on the surface of the TFT layer and provide a uniform substrate for the subsequent fabrication of the light-emitting layer and other functional layers. Commonly used planarization materials for the planarization layer 2 include photoresist, polyimide (PI), silicon dioxide (SiO2), etc., which are not limited in this embodiment.

[0044] As Figure 1 shown, through the pixel definition layer (PDL) process, a pixel definition layer 3 is provided on the side of the planarization layer 2 facing away from the driving substrate 1. The pixel definition layer 3 is an insulating layer used to define and isolate each pixel unit (so the pixel definition layer can be in a grid pattern). Its main function is to form a plurality of opening regions 301 on the anode. The opening regions penetrate the entire pixel definition layer. Each opening region corresponds to a pixel unit, ensuring that the light-emitting material can be precisely deposited in the designated pixel region, thereby avoiding crosstalk between pixel units and forming a plurality of pixel units arranged in an array on the display panel. In this embodiment, the shape and size of the opening regions are not limited. The pixel definition layer 3 is made of a photosensitive organic material (such as photoresist) or an inorganic insulating material (such as silicon dioxide), which is not limited in this embodiment. In addition, the pixel definition layer 3 can be a black pixel definition layer (BPDL), which has a light-blocking effect, thereby avoiding or reducing the mixing of light emitted by adjacent light-emitting units.

[0045] As Figure 1 shown, a light-emitting layer 4 is provided on the side of the pixel definition layer 3 facing away from the driving substrate 1. The light-emitting layer 4 includes a plurality of light-emitting units located in different opening regions 301. Each light-emitting unit is located in a corresponding opening region, that is, each light-emitting unit corresponds to a pixel unit. The light-emitting layer is also an electro-luminescent layer (EL). Its function is to convert electrical energy into light energy to achieve the display function, and by selecting different light-emitting materials, the light-emitting units can emit different colors of light (such as red, green, blue). The light-emitting units can be red light-emitting units that can emit red light, green light-emitting units that can emit green light, and blue light-emitting units that can emit blue light. Exemplarily, the embodiments of the present application can select organic light-emitting diodes to fabricate the above-mentioned respective light-emitting units. The light-emitting layer is usually composed of multiple layers of organic materials, which are not limited in this embodiment.

[0046] As shown Figure 1 In the figure, a first electrode layer 5 is disposed on a side of the light-emitting layer 4 facing away from the driving substrate 1, and a surface of the first electrode layer facing away from the driving substrate 1 is an uneven surface. Specifically, the first electrode layer 5 includes a first main body portion 501 and a concavo-convex portion 502. The concavo-convex portion 502 is disposed around the periphery of the opening region 301 and close to the opening region 301. A surface of the concavo-convex portion 502 facing away from the driving substrate 1 is higher than or lower than a surface of the first main body portion 501 facing away from the driving substrate 1, that is, the concavo-convex portion 502 may be a convex portion or a concave portion. Among them, a plane where the surface (upper and lower two planes) of the first main body portion 501 is located is parallel to a plane where the substrate surface is located. Figure 1 The figure shows a case where the concavo-convex portion is a convex portion, that is, a surface of the concavo-convex portion 502 facing away from the driving substrate 1 is higher than a surface of the first main body portion 501 facing away from the driving substrate 1. The first electrode layer 5 may be a cathode electrode layer (Cathode Touch Layer, CTD), which is mainly used for electron injection and light emission, and usually uses a highly conductive and transparent material, such as silver (Ag), aluminum (Al), or ITO (indium tin oxide), and the thickness is usually 50 nm to 200 nm, which is not limited in this embodiment.

[0047] Among them, the display panel at least includes: positive projections of two adjacent concavo-convex portions 502 on the driving substrate 1 do not have translational symmetry. In the display panel, a plurality of pixel units are arranged in an array, each pixel unit corresponds to an opening region, and a concavo-convex portion surrounding the opening region. In this embodiment, it is proposed that there are two adjacent concavo-convex portions in the display panel that are not completely the same, so that the positive projections of the two on the driving substrate do not have translational symmetry (translating one of the positive projections, and the two will not completely overlap). Exemplarily, the shapes of the two concavo-convex portions are different, the sizes are different, or the rotation angles are different.

[0048] In this embodiment, the first electrode layer includes a first main body portion 501 and a concavo-convex portion 502, wherein a surface of the first main body portion 501 is a flat surface, and a surface of the concavo-convex portion 502 is a convex surface or a concave surface. Refer to Figure 2 , Figure 2 The figure shows a schematic structural diagram of a first electrode layer. As shown Figure 2 in the figure, there are two cases for the structure of the first electrode layer: one is that the thicknesses of the first main body portion 501 and the concavo-convex portion 502 are different, and the other is that the thicknesses of the first main body portion 501 and the concavo-convex portion 502 are the same.

[0049] In a possible implementation manner, a thickness of the concavo-convex portion is the same as a thickness of the first main body portion.

[0050] When the thicknesses of the first main body portion 501 and the concavo-convex portion 502 are the same: Figure 2In (a), when the concavo-convex part is a convex part, the surface of the concavo-convex part 502 facing away from the driving substrate 1 is higher than the surface of the first main body part 501 facing away from the driving substrate 1, and the surface of the concavo-convex part 502 close to the driving substrate 1 is higher than the surface of the first main body part 501 close to the driving substrate 1. Figure 2 In (b), when the concavo-convex part is a concave part, the surface of the concavo-convex part 502 facing away from the driving substrate 1 is lower than the surface of the first main body part 501 facing away from the driving substrate 1, and the surface of the concavo-convex part 502 close to the driving substrate 1 is lower than the surface of the first main body part 501 close to the driving substrate 1.

[0051] When the thicknesses of the first main body part 501 and the concavo-convex part 502 are different, the surfaces of the first main body part 501 and the concavo-convex part 502 close to the driving substrate 1 are made into an integrated flat surface, as Figure 2 In (c), when the concavo-convex part is a convex part, the surface of the concavo-convex part 502 facing away from the driving substrate 1 is higher than the surface of the first main body part 501 facing away from the driving substrate 1, and the surface of the concavo-convex part 502 close to the driving substrate 1 is level with the surface of the first main body part 501 close to the driving substrate 1. Figure 2 In (d), when the concavo-convex part is a concave part, the surface of the concavo-convex part 502 facing away from the driving substrate 1 is lower than the surface of the first main body part 501 facing away from the driving substrate 1, and the surface of the concavo-convex part 502 close to the driving substrate 1 is level with the surface of the first main body part 501 close to the driving substrate 1.

[0052] When external light (such as ambient light) irradiates the backplane of the display panel, reflection occurs in the first electrode layer, generating reflected light. When the reflected light passes through the opening region of the pixel defining layer and the opening region of the BM (black matrix) of the display panel, diffraction and interference occur, thereby generating patterns such as color stripes, affecting the display effect. In an embodiment of the present application, on the one hand, by providing a cathode layer with concavo-convex parts, the concavo-convex parts surround the opening region. When external ambient light irradiates the display panel, due to the concavo-convex parts causing the surface of the cathode layer to be uneven, the reflected light generated by the cathode layer undergoes destructive interference in the region where the concavo-convex parts are located (a phenomenon in which when two or more light waves are superimposed in space, due to a phase difference of half a wavelength, the amplitudes of the light waves cancel each other out, thereby weakening or even completely disappearing the light intensity), thereby improving color separation diffraction. On the other hand, at least two adjacent concavo-convex parts in the display panel do not have translational symmetry in the orthographic projection on the driving substrate (that is, the shapes, sizes, or rotation angles in the plane are different), so that the diffraction patterns generated by the corresponding pixel units are different, and when the diffraction patterns are mixed, they become blurred, achieving a scattering effect.

[0053] 1.2. In this embodiment, a convex structure or a concave structure of the pixel defining layer is used to generate the concavo-convex parts of the first electrode layer.

[0054] In this embodiment, the pixel definition layer includes a convex structure or a concave structure. Thus, when the first electrode layer is prepared on the pixel definition layer, the first electrode layer inherits the surface morphology of the pixel definition layer, forming uneven portions on the first electrode layer.

[0055] In a possible implementation, the pixel definition layer includes a second main portion and a first convex portion. The first convex portion is located on a side of the second main portion close to the opening region. The first convex portion is disposed around the periphery of the opening region and close to the opening region. A surface of the first convex portion facing away from the driving substrate is higher than a surface of the second main portion facing away from the driving substrate, and a thickness of the first convex portion is greater than a thickness of the second main portion; and

[0056] A positive projection of the first convex portion and the uneven portions of the first electrode layer on the driving substrate overlaps. A surface of the uneven portions facing away from the driving substrate is higher than a surface of the first main portion facing away from the driving substrate.

[0057] Specifically, referring to Figure 3 , Figure 3 FIG. shows a schematic structural diagram of a pixel definition layer. As shown in Figure 3 , the pixel definition layer 3 includes a second main portion 302 and a first convex portion 303. The first convex portion 303 encloses a plurality of opening regions 301. Since a surface of the first convex portion 303 facing away from the driving substrate 1 is higher than a surface of the second main portion 302 facing away from the driving substrate 1, the surface of the pixel definition layer 3 facing away from the driving substrate 1 is uneven. Thus, when the first electrode layer 5 is prepared on this surface, the first electrode layer 5 inherits the surface morphology of the pixel electrode layer 3, obtaining uneven portions 502 on the first electrode layer 5. In this case, a height difference between a surface of the uneven portions 502 (as shown in (a) in Figure 2 ) facing away from the driving substrate 1 and a surface of the first main portion 501 facing away from the driving substrate is approximately equal to a height difference between the first convex portion 303 and the second main portion 302.

[0058] Among them, the thickness of the first convex portion 303 is greater than the thickness of the second main portion 302. Specifically, the surfaces of the second main portion 302 and the first convex portion 303 close to the driving substrate 1 can be flat and smooth surfaces. As shown in Figure 3 , a surface of the flat layer 2 away from the driving substrate 1 is a flat surface. In this case, in order to generate the first convex portion 303, the thickness of the first convex portion 303 needs to be greater than the thickness of the second main portion 302.

[0059] In the orthographic projection of the driving substrate 1, the orthographic projection of the first protrusion 303 away from the outer contour of the opening region 301 is substantially aligned with the orthographic projection of the concavo-convex portion 502 away from the outer contour of the opening region 301; the orthographic projection of the first protrusion 303 close to the inner contour of the opening region 301 is substantially aligned with the orthographic projection of the concavo-convex portion 502 close to the inner contour of the opening region 301. That is, the concavo-convex portion 502 of the first electrode layer is a convex structure having the same shape as the first protrusion 303 generated by the first electrode layer 5 covering and contacting the first protrusion 303 of the pixel definition layer 3.

[0060] In a possible implementation manner, the pixel definition layer includes a third main body portion and a first recess. The first recess is located on a side of the third main body portion close to the opening region. The first recess is disposed around the periphery of the opening region and close to the opening region; the surface of the first recess facing away from the driving substrate is lower than the surface of the third main body portion facing away from the driving substrate, and the thickness of the first recess is less than the thickness of the third main body portion; and

[0061] the orthographic projection of the first recess on the driving substrate overlaps with the orthographic projection of the concavo-convex portion of the first electrode layer, and the surface of the concavo-convex portion facing away from the driving substrate is lower than the surface of the first main body portion facing away from the driving substrate.

[0062] Specifically, referring to Figure 4 , Figure 4 shows a schematic structural diagram of another pixel definition layer. As Figure 4 shown, the pixel definition layer 3 includes a third main body portion 304 and a first recess 305. The first recess 305 encloses a plurality of opening regions 301. Since the surface of the first recess 305 facing away from the driving substrate 1 is lower than the surface of the third main body portion 304 facing away from the driving substrate 1, the surface of the pixel definition layer 3 facing away from the driving substrate 1 is uneven. Thus, when preparing the first electrode layer 5 on this surface, the first electrode layer 5 inherits the surface topography of the pixel electrode layer 3 to obtain the concavo-convex portion 502 of the first electrode layer 5. In this case, the height difference between the surface of the concavo-convex portion 502 (as shown in (b) in Figure 2 ) facing away from the driving substrate 1 and the surface of the first main body portion 501 facing away from the driving substrate is substantially equal to the height difference between the third main body portion 304 and the first recess 305.

[0063] Among them, the thickness of the first recess 305 is less than the thickness of the third main body portion 304. Specifically, the surfaces of the third main body portion 304 and the first recess 305 close to the driving substrate 1 can be made flat and smooth surfaces. As Figure 4 shown, the surface of the flat layer 2 away from the driving substrate 1 is a flat surface. In this case, in order to generate the first recess 305, the thickness of the first recess 305 needs to be less than the thickness of the third main body portion 304.

[0064] In the orthographic projection of the driving substrate 1, the orthographic projection of the first recess 305 away from the outer contour of the opening region 301 is substantially aligned with the orthographic projection of the concavo-convex portion 502 away from the outer contour of the opening region 301; the orthographic projection of the first recess 305 close to the inner contour of the opening region 301 is substantially aligned with the orthographic projection of the concavo-convex portion 502 close to the inner contour of the opening region 301. That is, the concavo-convex portion 502 of the first electrode layer is a recessed structure having the same shape as the first recess 305 generated by the first electrode layer 5 covering and contacting the first recess 305 of the pixel defining layer 3.

[0065] 1.3. Generate the concavo-convex portion of the first electrode layer by using the boss structure of the planarization layer.

[0066] In this embodiment, the planarization layer includes a planarization layer boss, so that the pixel defining layer and the first electrode layer are prepared on the planarization layer, so that the pixel electrode layer inherits the surface topography of the planarization layer, and the first electrode layer inherits the surface topography of the pixel electrode layer. Specifically, the opening region of the pixel defining layer is located on the planarization layer boss, and a raised structure corresponding to the edge of the planarization layer boss is formed around the opening region of the pixel defining layer. Furthermore, when the first electrode layer is prepared on the pixel defining layer, the first electrode layer inherits the surface morphology of the pixel defining layer, forming the concavo-convex portion of the first electrode layer. The height difference between the surface of the concavo-convex portion facing away from the driving substrate and the surface of the first main body portion facing away from the driving substrate is substantially equal to the height difference between the surface of the planarization layer boss facing away from the driving substrate and the surface of the fourth main body portion facing away from the driving substrate.

[0067] In a possible implementation manner, the planarization layer includes a fourth main body portion and a planarization layer boss. The orthographic projection of the planarization layer boss on the driving substrate covers the orthographic projection of the opening region on the driving substrate. The surface of the planarization layer boss facing away from the driving substrate is higher than the surface of the fourth main body portion facing away from the driving substrate, and the thickness of the planarization layer boss is greater than the thickness of the fourth main body portion; and

[0068] In the orthographic projection on the driving substrate, the orthographic projection of the outer contour of the concavo-convex portion away from the opening region is aligned with the orthographic projection of the outer contour of the planarization layer boss, and the orthographic projection of the inner contour of the concavo-convex portion close to the opening region is aligned with the orthographic projection of the outer contour of the opening region.

[0069] Specifically, referring to Figure 5 , Figure 5 shows a schematic structural diagram of a planarization layer, as Figure 5As shown, the flat layer 2 includes a fourth main body portion 201 and a flat layer boss 202. Among them, the flat layer boss is a convex structure, and the top of the convex structure is a horizontal surface with a certain size. The plane where the horizontal surface is located is parallel to the plane where the surface of the substrate of the driving substrate 1 is located. Thus, when preparing the pixel definition layer, the opening area 301 of the pixel definition layer can be located on the flat layer boss 202, so that the orthographic projection of the flat layer boss 202 on the driving substrate 1 covers the orthographic projection of the opening area 301 on the driving substrate 1. Therefore, the cross-sectional area of the opening area needs to be smaller than the cross-sectional area of the boss. The surface of the flat layer boss 202 facing away from the driving substrate 1 is higher than the surface of the fourth main body portion 201 facing away from the driving substrate 1.

[0070] Among them, the thickness of the flat layer boss 202 is greater than the thickness of the fourth main body portion 201. Specifically, the surfaces of the fourth main body portion 201 and the flat layer boss 202 on the side close to the driving substrate 1 can be flat and smooth surfaces, such as Figure 5 As shown, in this case, in order to generate the flat layer boss 202, the thickness of the flat layer boss 202 needs to be greater than the thickness of the fourth main body portion 201. The flat layer boss can be fabricated using an HT Mask (i.e., the mask originally used for preparing the flat layer), or an additional Mask can be added to separately prepare the flat layer boss.

[0071] Such as Figure 5 As shown, the pixel definition layer 3 is prepared on the flat layer 2, so that the position of the opening area of the pixel definition layer corresponds to the position of the flat layer boss. Since the opening area of the opening area is smaller than the area of the flat layer boss, the pixel definition layer near the opening area will deform with the flat layer boss and inherit the surface topography of the edge of the flat layer boss, that is, a convex structure of the pixel definition layer is generated. The pixel definition layer includes a fifth main body portion and a second convex (a convex structure corresponding to the edge of the flat layer boss generated because the pixel definition layer covers and contacts the flat layer boss). The second convex is located on the side of the fifth main body portion close to the opening area. The second convex is disposed around the opening area and close to the opening area. The surface of the second convex facing away from the driving substrate is higher than the surface of the fifth main body portion facing away from the driving substrate, and the thickness of the second convex is the same as the thickness of the fifth main body portion. The height difference between the surface of the second convex facing away from the driving substrate and the surface of the fifth main body portion facing away from the driving substrate is approximately equal to the height difference between the surface of the flat layer boss facing away from the driving substrate and the surface of the fourth main body portion facing away from the driving substrate. In the orthographic projection on the driving substrate, the orthographic projection of the outer contour of the second convex far from the opening area is aligned with the orthographic projection of the outer contour of the flat layer boss, and the orthographic projection of the second convex and the concave-convex portion of the first electrode layer on the driving substrate overlaps. The surface of the concave-convex portion facing away from the driving substrate is higher than the surface of the first main body portion facing away from the driving substrate.

[0072] Such asFigure 5 As shown, the pixel defining layer 3 conforms to the convex shape of the edge portion of the flat layer boss 202, such that the surface of the pixel defining layer 3 facing away from the driving substrate 1 is uneven. When the first electrode layer 5 is formed on the pixel defining layer 3, the first electrode layer 5 will deform accordingly and inherit the surface topography of the convex structure on the surface of the pixel defining layer 3 facing away from the driving substrate, that is, the uneven portion 502 of the first electrode layer 5 is obtained. In this case, in the orthographic projection on the driving substrate, the orthographic projection of the outer contour of the uneven portion 502 away from the opening region 301 is aligned with the orthographic projection of the outer contour of the flat layer boss 202 (i.e., the starting position of the convexity of the uneven portion overlaps with the starting position of the convexity of the flat layer boss), and the orthographic projection of the inner contour of the uneven portion 502 close to the opening region 301 is aligned with the orthographic projection of the outer contour of the opening region 301 (the position of the inner contour of the uneven portion is the position of the edge of the opening region). The thickness of each position in the first electrode layer is uniform, that is, the thickness of the uneven portion is the same as the thickness of the first main portion.

[0073] In a possible implementation, the thickness of the flat layer boss is less than the sum of the thickness of the pixel defining layer and the thickness of the fourth main portion.

[0074] Specifically, as Figure 5 shown, on the surface of the flat layer facing away from the driving substrate, the surface of the flat layer boss is higher than the surface of the fourth main layer. By controlling the thickness of the flat layer boss, the surface of the flat layer boss is made lower than the surface of the pixel defining layer.

[0075] Among them, the display panel at least includes: the orthographic projections of two adjacent uneven portions on the driving substrate 1 do not have translational symmetry. Correspondingly, since the shape of the uneven portion in the first electrode layer inherits the topography of the edge of the flat layer boss, correspondingly, it is necessary to make there exist in the display panel: the orthographic projections of two adjacent flat layer bosses on the driving substrate 1 do not have translational symmetry. In the display panel, a plurality of pixel units are arranged in an array, each pixel unit corresponding to an opening region, and an uneven portion surrounding the opening region, and a flat layer boss corresponding to the uneven portion. This embodiment proposes to make two adjacent flat layer bosses in the display panel not completely the same, so that their orthographic projections on the driving substrate do not have translational symmetry (translating one of the orthographic projections, and the two will not completely overlap). Exemplarily, the shapes, sizes, or rotation angles of the two flat layer bosses are different.

[0076] In this embodiment, the flat layer bosses under each pixel unit are arranged in different shapes, sizes or rotation angles. After the first electrode layer covers them, since it cannot be completely flat, the diffraction patterns are mixed and blurred when reflecting light, resulting in different diffraction patterns (i.e., the distribution of light after passing through the flat layer bosses) of the pixel units. This diversity reduces the consistency of the diffraction patterns between multiple pixel units, thus avoiding obvious diffraction fringes. This makes the color of the display more uniform and the visual effect better.

[0077] 1.4 Other related structures in the display panel.

[0078] In a possible implementation manner, the display panel further includes:

[0079] A light-shielding layer located on the side of the first electrode layer away from the driving substrate, the light-shielding layer includes a plurality of light-shielding layer openings, and each light-shielding layer opening corresponds to one of the opening regions;

[0080] The orthographic projection of the light-shielding layer opening on the driving substrate covers the orthographic projection of the opening region on the driving substrate, and the orthographic projection of the light-shielding layer opening on the driving substrate covers the orthographic projection of the uneven portion on the driving substrate.

[0081] Specifically, as Figures 1 to 5 shown, the display panel further includes a light-shielding layer 6, which is located on the side of the first electrode layer 5 away from the driving substrate 1. The light-shielding layer is a black matrix (BM), which is a light-shielding layer used to improve the display contrast and prevent light crosstalk, and is usually located in the color filter layer of the OLED panel. And the light-shielding layer is also used to define the boundary of each pixel unit to ensure a clear separation between the light-emitting area and the non-light-emitting area. Therefore, the light-shielding layer 6 includes a plurality of light-shielding layer openings 601, and each light-shielding layer opening 601 corresponds to one pixel unit.

[0082] Moreover, each light-shielding layer opening 601 corresponds to one opening region 301, and the opening area of the light-shielding layer opening is larger than the opening area of the opening region, so that the orthographic projection of the light-shielding layer opening 601 on the driving substrate 1 covers the orthographic projection of the corresponding opening region 301 on the driving substrate 1.

[0083] Moreover, the opening area of the light-shielding layer opening 601 is larger than the opening area of the uneven portion 502 of the first electrode layer 5, and the orthographic projection of the light-shielding layer opening 601 on the driving substrate 1 covers the orthographic projection of the uneven portion 502 on the driving substrate 1. When the pixel definition layer proposed in Section 1.2 includes a first protrusion or a first depression, the opening area of the light-shielding layer opening 601 is larger than the opening area surrounded by the first protrusion 303 or the first depression 305 (inner contour), that is, the orthographic projection of the light-shielding layer opening 601 on the driving substrate 1 covers the orthographic projection of the shape surrounded by the first protrusion 303 or the first depression 305 (inner contour) on the driving substrate 1. When the flat layer proposed in Section 1.3 includes a flat layer boss, the opening area of the light-shielding layer opening 601 is larger than the area of the flat layer boss 502, that is, the orthographic projection of the light-shielding layer opening 601 on the driving substrate 1 covers the orthographic projection of the flat layer boss 502 on the driving substrate 1.

[0084] Furthermore, the shapes and sizes of the light-shielding layer openings of each pixel unit are the same, and the shapes and sizes of the opening regions are the same. Also, in each pixel unit, the light-shielding layer opening and the opening region are relatively stable, that is, the relative positions between the orthographic projection of the light-shielding layer opening on the driving substrate and the orthographic projection of the opening region on the driving substrate are the same. Since the opening region and the BM opening (i.e., the light-shielding layer opening) are relatively constant, there will be no color deviation problem caused by the difference between the opening region and the light-shielding layer opening in the case of a small display range.

[0085] In a possible implementation manner, the display panel further includes:

[0086] A second electrode layer, which is located between the flat layer and the pixel definition layer, includes a plurality of second electrodes, and the orthographic projection of the second electrodes on the driving substrate covers the orthographic projection of the opening region on the driving substrate;

[0087] The light-emitting layer is located between the second electrode layer and the first electrode layer, and the second electrode layer and the light-emitting layer are located within the opening region;

[0088] On the side of the first electrode layer away from the driving substrate, a thin film encapsulation layer, a light-shielding layer, and a color filter are sequentially stacked; wherein, the light-shielding layer includes a plurality of light-shielding layer openings, and the color filter is located within the light-shielding layer openings.

[0089] Specifically, as Figures 1 to 5As shown, the display panel further includes a second electrode layer 7, which can be an anode layer. After the flat layer 2 is fabricated, the anode layer is fabricated on the surface of the flat layer facing away from the driving substrate, and then the pixel regions are defined on the anode layer, and the pixel definition layer 3 is fabricated. The material used for the second electrode layer 7 can be a transparent conductive material, such as ITO, and the thickness is usually 100 nm to 200 nm. The second electrode layer 7 is located between the flat layer 2 and the pixel definition layer 3 and is within the opening region. As Figures 1 to 5 shown, the driving substrate 1, the flat layer 2, the second electrode layer 7 (within the opening region of the pixel definition layer 3), the pixel definition layer 3, the light-emitting layer 4 (within the opening region of the pixel definition layer 3), the first electrode layer 5, the thin film encapsulation layer 8, the touch layer 9, the first organic layer 10, the light-shielding layer 6, the color filter 11, and the second organic layer 12 are sequentially arranged along the thickness direction of the display panel.

[0090] Among them, the thin film encapsulation layer 8 refers to a packaging technology (Thin Film Encapsulation, TFE) for protecting the OLED device from the external environment (such as moisture and oxygen). TFE is usually composed of multiple stacked thin films (including organic layers and inorganic layers). The inorganic layer is usually made of materials such as silicon nitride (SiN x )), aluminum oxide (Al2O3), or silicon dioxide (SiO2) to block the penetration of moisture and oxygen. The organic layer is usually made of materials such as polyimide (PI) or acrylic resin to fill the defects between the inorganic layers and provide flexibility.

[0091] The display panel proposed in this embodiment can be a display panel using the COE technology. In the COE technology, the color filter is directly integrated on the thin film encapsulation layer 8. Specifically, the touch layer 9, that is, the TOUCH layer, is fabricated on the thin film encapsulation layer 8 through the integrated fine metal line (FMLOC, Fine Metal Line On Cell) process. The FMLOC technology is mainly used to integrate high-precision metal lines in the encapsulation layer or the display area of the OLED display panel to achieve specific functions or optimize the display performance. The first organic layer 10 is fabricated on the touch layer 9 for a certain degree of encapsulation. The first organic layer 10 can be made of materials such as polyimide (PI) or acrylic resin. The light-shielding layer 6 is fabricated on the first organic layer 10, and the color filter 11 is disposed within the opening of the light-shielding layer. The color filter (CF) is a key component for realizing full-color display. As Figure 1 shown, the organic encapsulation layer, that is, the second organic layer 12, is fabricated on the color filter 11.

[0092] 1.5. At least two adjacent uneven portions in the display panel have different shapes, different rotation angles, or different relative positions with respect to the opening region.

[0093] In this embodiment, in order to ensure that the orthographic projections of two adjacent protrusions and depressions on the driving substrate do not have translational symmetry, there are three cases: 1) The shapes of two adjacent protrusions and depressions are different; 2) The angles of two adjacent protrusions and depressions are different; 3) The relative positions of two adjacent protrusions and depressions with respect to the opening region are different.

[0094] 1.5.1. The shapes of two adjacent protrusions and depressions are different.

[0095] In a possible implementation manner, the orthographic projection of the protrusion and depression on the driving substrate is a closed structure surrounding the opening region.

[0096] Specifically, the shape of the orthographic projection of the protrusion and depression on the driving substrate can be a regular figure or an irregular figure.

[0097] In a possible implementation manner, the outer contour shape of the orthographic projection of the protrusion and depression on the driving substrate includes one or more of: oval, rectangle, triangle, trapezoid.

[0098] Specifically, in this display panel, there are at least two adjacent protrusions and depressions, and the shapes (i.e., the outer contour shapes) of the orthographic projections of these two adjacent protrusions and depressions on the driving substrate are different. Exemplarily, there are protrusion A and protrusion B in this display panel, such that the shape of the orthographic projection of protrusion A on the driving substrate is oval, and the shape of the orthographic projection of protrusion B on the driving substrate is rectangle. Thereby, the diffraction pattern generated by light reflection of the pixel unit where protrusion A is located is different from the diffraction pattern generated by light reflection of the pixel unit where protrusion B is located, and the two different diffraction patterns are mixed to cause the diffraction pattern to be blurred, so as to achieve the purpose of eliminating the light diffraction effect.

[0099] In the case where the pixel definition layer proposed in Section 1.2 includes the first protrusion or the first depression, the shape of the protrusion and depression of the first electrode layer imitates the shape of the first protrusion or the first depression of the pixel definition layer. Therefore, correspondingly, the orthographic projection of the first protrusion or the first depression on the driving substrate is a closed structure surrounding the opening region. Further, the outer contour shape of the orthographic projection of the first protrusion or the first depression on the driving substrate includes one or more of: oval, rectangle, triangle, trapezoid.

[0100] In the case where the flat layer proposed in Section 1.3 includes flat layer bosses, the pixel definition layer conforms to the shape of the edge of the flat layer boss to form a convex structure. Then, a first electrode layer is prepared on the pixel definition layer, such that the first electrode layer conforms to the convex shape of the pixel definition layer to generate the concave and convex portions of the first electrode layer. In this case, the shape of the concave and convex portions is similar to the shape of the flat layer boss. Therefore, in the orthographic projection on the driving substrate, the orthographic projection of the outer contour of the concave and convex portions far from the opening region is aligned with the orthographic projection of the outer contour of the flat layer boss, and the orthographic projection of the inner contour of the concave and convex portions close to the opening region is aligned with the orthographic projection of the outer contour of the opening region. Therefore, correspondingly in this embodiment, the orthographic projection of the outer contour of the flat layer boss on the driving substrate is a closed structure surrounding the opening region. Further, the shape of the orthographic projection of the outer contour of the flat layer boss on the driving substrate includes one or more of: oval, rectangular, triangular, trapezoidal.

[0101] 1.5.2. The rotation angles of two adjacent concave and convex portions are different.

[0102] In a possible implementation manner, a plurality of the opening regions are arranged in the row direction and the column direction. The display panel at least includes: the rotation angles of the concave and convex portions corresponding to two adjacent opening regions are different. The rotation angle refers to: the included angle between the centroid principal axis of the orthographic projection shape of the concave and convex portion on the driving substrate and the row direction.

[0103] Referring to Figure 6 , Figure 6 shows a schematic diagram of a rotation angle. As Figure 6 shown, the circle outlined by the solid line represents the orthographic projection of the opening region on the driving substrate, and the ellipse outlined by the dashed line represents the orthographic projection of the concave and convex portion on the driving substrate. The display panel includes pixel units arranged in an array, and each pixel unit corresponds to an opening region. Therefore, in the display panel, the opening regions are also arranged in rows and columns. In this embodiment, the rotation angle refers to the included angle (such as the included angle α between axis 1 and axis 2 shown in Figure 6 the ellipse in) between the centroid principal axis (axis 1 of the ellipse in Figure 6 ) of the orthographic projection shape of the concave and convex portion on the driving substrate and the row direction (axis 2 in Figure 6 ) in which the opening regions are arranged. The centroid principal axis is the principal axis of inertia that makes the product of inertia equal to zero, and this principal axis of inertia passes through the centroid of the figure. Since the orthographic projection shape of the concave and convex portion on the driving substrate can be a regular shape or an irregular shape, when the orthographic projection shape is a regular shape, the centroid principal axis is also the axis of symmetry of this shape.

[0104] Specifically, in the display panel, there are at least two adjacent concave-convex portions, and the rotation angles of these two adjacent concave-convex portions are different. Exemplarily, there are a concave-convex portion A and a concave-convex portion B in the display panel, such that the rotation angle of the concave-convex portion A is 10°, and the rotation angle of the concave-convex portion B is 30°. Thus, the diffraction pattern generated by the light reflection of the pixel unit where the concave-convex portion A is located is different from the diffraction pattern generated by the light reflection of the pixel unit where the concave-convex portion B is located. The two different diffraction patterns are mixed to cause the diffraction pattern to be blurred, thereby achieving the purpose of eliminating the light diffraction effect.

[0105] In a possible implementation manner, the rotation angles of the concave-convex portions in each row of the opening regions are the same, and the display panel at least includes: the rotation angles of the concave-convex portions corresponding to two adjacent rows of the opening regions are different.

[0106] Referring to Figure 7 , Figure 7 shows a schematic diagram of the orthographic projection of a concave-convex portion on a driving substrate. As Figure 7 shown, the circle outlined by the solid line represents the orthographic projection of the opening region on the driving substrate, and the ellipse outlined by the dashed line represents the orthographic projection of the concave-convex portion on the driving substrate. As Figure 7 shown, the rotation angles of the concave-convex portions corresponding to the opening regions in each row are the same, and the rotation angles of the concave-convex portions in two adjacent rows are different. Exemplarily, the rotation angle of the concave-convex portion in the first row is 0°, and the rotation angle of the concave-convex portion in the second row is 30°. Further, the difference between the rotation angles of the concave-convex portions in two adjacent rows is a fixed difference (such as 30°, 45°), thereby avoiding too long a period formed by the pixel units and affecting the display effect.

[0107] In a possible implementation manner, the multiple opening regions include: a first opening region and a second opening region. The concave-convex portion surrounding the first opening region is a first concave-convex portion, and the concave-convex portion surrounding the second opening region is a second concave-convex portion;

[0108] For each row of the opening regions, the rotation angles of the first concave-convex portion and the second concave-convex portion are different;

[0109] The difference between the rotation angles of the first concave-convex portions in two adjacent rows is a first difference, and the difference between the rotation angles of the second concave-convex portions in two adjacent rows is the first difference.

[0110] Specifically, the display panel includes two types of pixel units, corresponding to the first opening region (and the first protrusion and depression) and the second opening region (and the second protrusion and depression), respectively. In the pixel units of each row, the rotation angles of the protrusions and depressions of the two types of pixel units are different (i.e., the first rotation angle and the second rotation angle), that is, in each row, there is a protrusion and depression A with a rotation angle of angle 1, and a protrusion and depression B with a rotation angle of angle 2. In adjacent two rows, the difference in the rotation angles between the protrusions and depressions A is a fixed difference (i.e., the first difference, such as 30°, 45°), and the difference in the rotation angles between the protrusions and depressions B is the first difference.

[0111] In the display panel, the pixel units can emit red light, blue light, or green light. Thus, the pixel units can be divided into three types: red-light pixel units, blue-light pixel units, and green-light pixel units. Refer to Figure 8 , Figure 8 shows a schematic diagram of the orthographic projection of another protrusion and depression on the driving substrate. As Figure 8 shown, the circle outlined by the solid line represents the orthographic projection of the opening region on the driving substrate, and the ellipse outlined by the dashed line represents the orthographic projection of the protrusion and depression on the driving substrate. As Figure 8 shown, the multiple opening regions include: a first opening region (corresponding to the red-light pixel unit A), a second opening region (corresponding to the blue-light pixel unit C), and a third opening region (corresponding to the green-light pixel unit B). The protrusion and depression surrounding the first opening region is the first protrusion and depression, the protrusion and depression surrounding the second opening region is the second protrusion and depression, and the protrusion and depression surrounding the third opening region is the third protrusion and depression; for each row of opening regions, the rotation angles between at least two of the three protrusions and depressions are different. Exemplarily, the rotation angle of the first protrusion and depression corresponding to the red-light pixel unit is 0°, the rotation angle of the second protrusion and depression corresponding to the blue-light pixel unit is 30°, and the rotation angle of the third protrusion and depression corresponding to the green-light pixel unit is 30°. For the same type of pixel unit, the difference in the rotation angles of the protrusions and depressions between adjacent two rows is a fixed difference, that is, the difference in the rotation angles of the first protrusion and depression between adjacent two rows is the first difference, the difference in the rotation angles of the second protrusion and depression between adjacent two rows is the first difference, and the difference in the rotation angles of the third protrusion and depression between adjacent two rows is the first difference.

[0112] 1.5.3. The relative positions of two adjacent protrusions and depressions and the opening region are different.

[0113] In a possible implementation manner, the multiple opening regions include: a first opening region and a second opening region. The protrusion and depression surrounding the first opening region is the first protrusion and depression, and the protrusion and depression surrounding the second opening region is the second protrusion and depression;

[0114] Among them, in the orthographic projection on the driving substrate, the center distance between the first opening region and the first concavo-convex portion is the first center distance, and the center distance between the second opening region and the second concavo-convex portion is the second center distance; the values of the first center distance and the second center distance are different.

[0115] The center distance refers to the distance between the geometric center of the pattern of the orthographic projection of the opening region and the geometric center of the pattern of the orthographic projection of the concavo-convex portion. The center distance represents the relative position between the opening region and the concavo-convex portion. Different center distances indicate different relative positions. The display panel includes two types of pixel units, corresponding to the first opening region (and the first concavo-convex portion) and the second opening region (and the second concavo-convex portion) respectively. In each row of pixel units, the center distances between the concavo-convex portions and the opening regions of the two types of pixel units are different (i.e., the first center distance and the second center distance). That is, in each row, there is a center distance of distance 1 between the concavo-convex portion A and the corresponding opening region a, and a center distance of distance 2 between the concavo-convex portion B and the corresponding opening region b.

[0116] In the display panel, the pixel units can emit red light, blue light or green light. Thus, the pixel units can be divided into three types: red light pixel units, blue light pixel units and green light pixel units. Refer to Figure 9 , Figure 9 shows a schematic diagram of the relative position between a concavo-convex portion and an opening region. As Figure 9 shown, the circle outlined by the solid line represents the orthographic projection of the opening region on the driving substrate, and the ellipse outlined by the dashed line represents the orthographic projection of the concavo-convex portion on the driving substrate. As Figure 9 shown, the multiple opening regions include: a first opening region (corresponding to the red light pixel unit A), a second opening region (corresponding to the blue light pixel unit C) and a third opening region (corresponding to the green light pixel unit B). The concavo-convex portion surrounding the first opening region is the first concavo-convex portion, the concavo-convex portion surrounding the second opening region is the second concavo-convex portion, and the concavo-convex portion surrounding the third opening region is the third concavo-convex portion; for at least two of the three types of pixel units in each row, the center distances between them are different. Exemplarily, for the red light pixel unit A and the green light pixel unit B, the center distances between the opening regions and the concavo-convex portions are the same. As Figure 9 shown, the center distance is 0 (the geometric center of the opening region coincides with the geometric center of the corresponding concavo-convex portion), while the center distance between the opening region and the concavo-convex portion of the blue light pixel unit C is greater than 0 (the orthographic projection of the opening region is located at one end of the elliptical orthographic projection of the concavo-convex portion).

[0117] In addition, the different shapes of the concavo-convex portions proposed in 1.5.1, the different rotation angles of the concavo-convex portions proposed in 1.5.2, and the different center distances proposed in 1.5.3 can be combined with one or more of the three schemes. AsFigure 9 As shown, it is possible not only to make the center distances between pixel units different, but also to make the rotation angles between different pixel units different.

[0118] This application proposes a novel structure for improving color separation. By making a flat layer boss with a different shape, generally an ellipse or other regular shape, below the opening region, and arranging the bosses at various different angles (i.e., different rotation angles), the first electrode layer above the flat layer inherits the convex shape of the edge of the boss, forming concave and convex portions surrounding the opening region. Ambient light is reflected at the concave and convex portions of the first electrode layer, so that the diffraction patterns generated by multiple pixel units are different, and there are few cases of diffraction constructive interference. At the same time, some light will also undergo destructive interference, making the diffraction pattern stripes blurred, achieving the purpose of improving color separation.

[0119] A second aspect of an embodiment of this application provides a display device, including: the display panel described in the first aspect of the embodiment of this application.

[0120] A third aspect of an embodiment of this application provides a method for manufacturing a display panel for manufacturing the display panel described in the first aspect. The method includes:

[0121] Providing a driving substrate;

[0122] Manufacturing a flat layer on the driving substrate;

[0123] Manufacturing a pixel definition layer, and disposing the pixel definition layer on a side of the flat layer away from the driving substrate. The pixel definition layer is used to define and form a plurality of opening regions;

[0124] Manufacturing a light-emitting layer, and disposing the light-emitting layer on a side of the pixel definition layer away from the driving substrate, including a plurality of light-emitting units located in different opening regions; and

[0125] Manufacturing a first electrode layer, and disposing the first electrode layer on a side of the light-emitting layer away from the driving substrate. The first electrode layer includes a first main body portion and concave and convex portions. The concave and convex portions are disposed around the periphery of the opening region and are close to the opening region. The surface of the concave and convex portions away from the driving substrate is higher or lower than the surface of the first main body portion away from the driving substrate;

[0126] Wherein, the display panel at least includes: the orthographic projections of two adjacent concave and convex portions on the driving substrate do not have translational symmetry.

[0127] Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts between each embodiment, reference can be made to each other.

[0128] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, commodity or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, commodity or device comprising said element.

[0129] The above has introduced in detail a display panel and a display device provided by the present application. Specific examples are used in this text to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

[0130] After considering the specification and practicing the invention disclosed herein, those skilled in the art will readily conceive of other embodiments of the present application. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0131] It should be understood that the present application is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

[0132] As used herein, the terms "an embodiment", "embodiment" or "one or more embodiments" mean that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. In addition, please note that the examples of the phrase "in one embodiment" herein do not necessarily all refer to the same embodiment.

[0133] In the specification provided herein, numerous specific details are set forth. However, it will be understood that embodiments of the present application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail so as not to obscure the understanding of this description.

[0134] In a claim, any reference sign between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present application may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third and the like do not denote any order. These words may be interpreted as names.

[0135] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: Driver substrate; A planar layer, disposed on one side of the driving substrate; A pixel definition layer is arranged on a side of the planar layer away from the driving substrate, and the pixel definition layer is used to define and form a plurality of opening areas; a light-emitting layer, disposed on a side of the pixel definition layer away from the driving substrate, comprising a plurality of light-emitting units located in different opening areas; and A first electrode layer is arranged on a side of the light-emitting layer away from the driving substrate, the first electrode layer comprises a first main body portion and a concave-convex portion, the concave-convex portion is arranged around the periphery of the opening area and close to the opening area, and a surface of the concave-convex portion away from the driving substrate is higher or lower than a surface of the first main body portion away from the driving substrate; Wherein, the display panel at least includes: the orthographic projections of the two adjacent concave-convex parts on the driving substrate do not have translational symmetry.

2. The display panel according to claim 1, characterized in that: The thickness of the concavo-convex portion is the same as the thickness of the first main body portion.

3. The display panel according to claim 1, characterized in that: The pixel definition layer includes a second main body and a first protrusion, the first protrusion is located on a side of the second main body close to the opening area, the first protrusion is arranged around the periphery of the opening area and close to the opening area, a surface of the first protrusion facing away from the drive substrate is higher than a surface of the second main body facing away from the drive substrate, and a thickness of the first protrusion is greater than a thickness of the second main body; and The first protrusion overlaps with the orthographic projection of the concavo-convex portion of the first electrode layer on the drive substrate, and a surface of the concavo-convex portion facing away from the drive substrate is higher than a surface of the first main body portion facing away from the drive substrate.

4. The display panel according to claim 1, characterized in that: The pixel definition layer includes a third main body and a first recess, wherein the first recess is located on a side of the third main body close to the opening area, and the first recess is arranged around the periphery of the opening area and close to the opening area; a surface of the first recess facing away from the drive substrate is lower than a surface of the third main body facing away from the drive substrate, and a thickness of the first recess is less than a thickness of the third main body; and The first depression overlaps with the orthographic projection of the concavo-convex portion of the first electrode layer on the drive substrate, and a surface of the concavo-convex portion facing away from the drive substrate is lower than a surface of the first main body portion facing away from the drive substrate.

5. The display panel according to claim 1, characterized in that: The flat layer includes a fourth main body and a flat layer boss, the orthographic projection of the flat layer boss on the driving substrate covers the orthographic projection of the opening area on the driving substrate, the surface of the flat layer boss away from the driving substrate is higher than the surface of the fourth main body away from the driving substrate, and the thickness of the flat layer boss is greater than the thickness of the fourth main body; and In the orthographic projection on the drive substrate, the orthographic projection of the outer contour of the concave-convex portion away from the opening area is aligned with the orthographic projection of the outer contour of the flat layer boss, and the orthographic projection of the inner contour of the concave-convex portion close to the opening area is aligned with the orthographic projection of the outer contour of the opening area.

6. The display panel according to claim 5, characterized in that: The thickness of the planar layer boss is less than the sum of the thickness of the pixel definition layer and the thickness of the fourth main body portion.

7. The display panel according to claim 1, characterized in that: The display panel further includes: A light shielding layer located on a side of the first electrode layer away from the driving substrate, the light shielding layer comprising a plurality of light shielding layer openings, each of the light shielding layer openings corresponding to one of the opening regions; The orthographic projection of the light shielding layer opening on the driving substrate covers the orthographic projection of the opening area on the driving substrate, and the orthographic projection of the light shielding layer opening on the driving substrate covers the orthographic projection of the concavo-convex portion on the driving substrate.

8. The display panel according to claim 1, characterized in that: The display panel further includes: A second electrode layer, the second electrode layer is located between the planar layer and the pixel definition layer, and includes a plurality of second electrodes, wherein the orthographic projection of the second electrode on the driving substrate covers the orthographic projection of the opening area on the driving substrate; The light-emitting layer is located between the second electrode layer and the first electrode layer, and the second electrode layer and the light-emitting layer are located in the opening area; On a side of the first electrode layer away from the driving substrate, there are stacked in sequence: a thin film encapsulation layer, a light shielding layer and a color filter; wherein the light shielding layer includes a plurality of light shielding layer openings, and the color filter is located in the light shielding layer openings.

9. The display panel according to any one of claims 1 to 8, characterized in that: The orthographic projection of the concavo-convex portion on the driving substrate is a closed structure surrounding the opening area.

10. The display panel according to claim 9, characterized in that: The outer contour shape of the orthographic projection of the concavo-convex portion on the driving substrate includes one or more of an ellipse, a rectangle, a triangle, and a trapezoid.

11. The display panel according to any one of claims 1 to 8, characterized in that: The plurality of opening areas are arranged along the row direction and the column direction, and the display panel at least includes: the rotation angles of the convex and concave parts corresponding to two adjacent opening areas are different, and the rotation angle refers to: the angle between the centroid principal axis of the positive projection of the convex and concave part on the driving substrate and the row direction.

12. The display panel according to claim 11, characterized in that: The rotation angles of the concavo-convex parts of each row of the opening areas are the same, and the display panel at least includes: the rotation angles of the concavo-convex parts corresponding to two adjacent rows of the opening areas are different.

13. The display panel according to claim 11, characterized in that: The plurality of opening regions include: a first opening region and a second opening region, the concave-convex portion surrounding the first opening region is a first concave-convex portion, and the concave-convex portion surrounding the second opening region is a second concave-convex portion; For each row of the opening areas, the first concave-convex portion and the second concave-convex portion have different rotation angles; A difference between the rotation angles of the first concave-convex portions in two adjacent rows is a first difference, and a difference between the rotation angles of the second concave-convex portions in two adjacent rows is the first difference.

14. The display panel according to any one of claims 1 to 8, characterized in that: The plurality of opening regions include: a first opening region and a second opening region, the concavo-convex portion surrounding the first opening region is a first concavo-convex portion, and the concavo-convex portion surrounding the second opening region is a second concavo-convex portion; Among them, in the orthographic projection on the driving substrate, the center distance between the first opening area and the first concave-convex portion is a first center distance, and the center distance between the second opening area and the second concave-convex portion is a second center distance; the values ​​of the first center distance and the second center distance are different.

15. A display device, characterized in that: The display device comprises: the display panel according to any one of claims 1-14.

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