Display panel and display device

Abstract

The present invention discloses a display panel and a display device. The display panel includes: a first display area and at least a part of a second display area surrounding the first display area; the display panel further includes: a substrate; a plurality of light-emitting units; a black matrix located on a side of the light-emitting units away from the substrate. In a first direction, which is perpendicular to the substrate, a maximum distance between the black matrix in the first display area and the substrate is d<subgt;1< / subgt>, and a maximum distance between the black matrix in the second display area and the substrate is d<subgt;2< / subgt>, and d<subgt;1< / subgt> < d<subgt;2< / subgt>. By setting d<subgt;1< / subgt> < d<subgt;2< / subgt>, the large-angle light emitted by the sub-pixels in the first display area can be emitted, effectively improving the brightness of the first display area, helping to balance the brightness between the first display area and the second display area, and achieving no difference in display brightness between the first display area and the second display area.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and more particularly, to a display panel and a display device. Background Art

[0002] With the continuous improvement of people's requirements for the display effect of electronic products, display products with a high screen-to-body ratio have gradually become the mainstream in the display product market. In order to achieve a high screen-to-body ratio, the concept of an under-screen camera has emerged, that is, a front camera is disposed within a display panel, and a semi-transmissive region corresponding to the under-screen camera is provided in the display region of the display panel. During normal display, the semi-transmissive region functions for display; during shooting by the under-screen camera, the under-screen camera shoots through the semi-transmissive region.

[0003] When the under-screen camera shoots, the under-screen camera needs to sense the external ambient light entering through the semi-transmissive region. In order to ensure the lighting effect of the under-screen camera, it is necessary to set a large light transmittance for the semi-transmissive region, but such a setting will cause the brightness of the semi-transmissive region to become darker.

[0004] Therefore, it is an urgent problem to provide a display panel and a display device that can improve the brightness of the semi-transmissive region so that the brightness of the semi-transmissive region is no different from that of the display region. Summary of the Invention

[0005] In view of this, the present invention provides a display panel and a display device for improving the brightness of the camera region.

[0006] On the one hand, the present invention provides a display panel, including: a first display region and at least a part of a second display region surrounding the first display region, wherein the transmittance of the first display region is greater than the transmittance of the second display region;

[0007] The display panel further includes:

[0008] a substrate;

[0009] a plurality of light-emitting units located on one side of the substrate;

[0010] a black matrix located on the side of the light-emitting units away from the substrate. In a first direction, the maximum distance between the black matrix located in the first display region and the substrate is d1, and the maximum distance between the black matrix located in the second display region and the substrate is d2, where d1 < d2, and the first direction is perpendicular to the substrate.

[0011] On the other hand, the present invention further provides a display device including the above display panel.

[0012] Compared with the prior art, the display panel and the display device provided by the present invention achieve at least the following beneficial effects:

[0013] For the first display area of the display panel provided by the present invention and at least part of the second display area surrounding the first display area, the transmittance of the first display area is greater than that of the second display area; the display panel further includes: a substrate; a plurality of light-emitting units located on one side of the substrate; a black matrix located on the side of the light-emitting units away from the substrate. In the first direction, which is perpendicular to the substrate, the maximum distance between the black matrix in the first display area and the substrate is d1, and the maximum distance between the black matrix in the second display area and the substrate is d2, and d1 < d2. Since the transmittance of the first display area is greater than that of the second display area, the brightness of the first display area is darker than that of the second display area. By setting d1 < d2, the large-angle light emitted by the sub-pixels in the first display area can be emitted, effectively improving the brightness of the first display area, helping to balance the brightness of the first display area and the second display area, and achieving no difference in the display brightness between the first display area and the second display area.

[0014] Of course, when implementing any product of the present invention, it is not necessarily required to achieve all the above-mentioned technical effects simultaneously.

[0015] Other features and advantages of the present invention will become clear from the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0017] Figure 1 is a schematic structural diagram of a display panel in the prior art;

[0018] Figure 2 is Figure 1 a sectional view taken along line A-A' in

[0019] Figure 3 is a schematic structural diagram of a display panel provided by the present invention;

[0020] Figure 4 is Figure 3 a sectional view taken along line B-B' in

[0021] Figure 5 is Figure 3 another sectional view taken along line B-B' in

[0022] Figure 6 is Figure 3 yet another sectional view taken along line B-B' in

[0023] Figure 7 isFigure 3 Another sectional view taken along line B-B' in [Chinese context];

[0024] Figure 8 It is Figure 3 Another sectional view taken along line B-B' in [Chinese context];

[0025] Figure 9 It is Figure 3 Another sectional view taken along line B-B' in [Chinese context];

[0026] Figure 10 It is Figure 3 Another sectional view taken along line B-B' in [Chinese context];

[0027] Figure 11 It is Figure 3 Another sectional view taken along line B-B' in [Chinese context];

[0028] Figure 12 It is a schematic plan view of a display device provided by an embodiment of the present invention. Detailed implementation manners

[0029] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and values set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation on the present invention, its application, or its use.

[0031] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the specification.

[0032] In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0033] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0034] In order to solve the problem of the dark brightness in the under-screen camera area, the inventor conducted the following research on the display panel in the related art:

[0035] Figure 1 It is a schematic structural view of a display panel 000 in the related art, Figure 2 It is Figure 1A cross-sectional view taken along the A-A' direction, showing that the display panel 000 includes a first display area AA1' and a second display area AA2' that at least partially surrounds the first display area AA1'. The first display area AA1' corresponds to the position of the under-screen camera. Since the light transmittance of the first display area AA1' needs to be large to meet the lighting requirements of the under-screen camera, the metal traces in the first display area AA1' are wound. Although this setting can improve the light transmittance of the first display area AA1', it will result in a smaller aperture area of the pixels in the first display area AA1' compared to the aperture area of the second display area AA2'. Figure 2 It is shown that the black matrix of the first display area and the black matrix of the second display area are at the same height. Since the aperture area of the pixel units in the first display area AA1' is smaller than that of the pixel units in the second display area AA2' or the pixel density of the pixel units in the first display area AA1' is smaller than that of the pixel units in the second display area AA2', the amount of light that can be emitted from the aperture area of the first display area AA1' also becomes less, resulting in a lower brightness of the first display area AA1' compared to the second display area AA2' and causing a display difference between the first display area AA1' and the second display area AA2'.

[0036] In view of this, the present invention provides a display panel and a display device. Specific embodiments of the display panel and the display device provided by the present invention will be described in detail below.

[0037] Refer to Figure 3 and Figure 4 , Figure 3 FIG. is a schematic structural diagram of a display panel 100 provided by the present invention. Figure 4 is Figure 3 A cross-sectional view taken along the B-B' direction in.

[0038] The display panel includes: a first display area AA1 and a second display area AA2 that at least partially surrounds the first display area AA1. The transmittance of the first display area AA1 is greater than that of the second display area AA2.

[0039] The display panel 100 further includes:

[0040] A substrate 1;

[0041] A plurality of light-emitting units 2 located on one side of the substrate 1;

[0042] A black matrix 3 located on the side of the light-emitting units 2 away from the substrate 1. Along the first direction X, the maximum distance between the black matrix 3 in the first display area AA1 and the substrate 1 is d1, and the maximum distance between the black matrix 3 in the second display area AA2 and the substrate 1 is d2, where d1 < d2. The first direction X is perpendicular to the substrate 1.

[0043] It should be noted that Figure 3 it is shown in that the first display area AA1 is the area for setting the under-screen camera, and the second display area AA2 is the normal display area Figure 4 it is shown in that the display panel 100 is an organic light-emitting display panel 100, which does not require a backlight module and can adopt a relatively thin organic material coating and a glass substrate. When an electric current passes through, these organic materials will emit light, and the organic light-emitting display panel 100 can be made lighter and thinner, significantly saving electrical energy. The substrate 1 serves as a carrier to carry other structures of the display panel 100, such as the array layer 4 disposed between the substrate 1 and the light-emitting unit 2 and the film layer for planarizing the surface of the array layer 4, etc. Among them, the array layer 4 may include a gate metal layer, a source-drain metal layer, and an active layer, and may also include an insulating layer between each conductive film layer. Specifically, when the display panel 100 is a rigid panel, the substrate 1 can be made of glass, transparent resin, etc.; when the display panel 100 is a flexible display panel 100, the substrate 1 can be made of polyimide, polycarbonate, etc. The material of the black matrix 3 can be an opaque material, which is used to block the non-light-emitting areas in the display panel 100 to prevent light from damaging the non-light-emitting areas in the display panel 100. Figure 3 it is only shown in that the shape of the display panel 100 is a rectangle with rounded corners, and it can also be a circular, oval or irregular shape, etc. The positions and sizes of the first display area AA1 and the second display area AA2 are only for illustration and are not specifically limited. The light-emitting unit 2 includes a cathode layer 5, a light-emitting portion 6, and an anode layer 7. A packaging layer 8, etc. can also be provided on the side of the light-emitting unit 2 away from the substrate 1, which will not be elaborated here.

[0044] It can be understood that Figure 4It is shown in the figure that the sub-pixel opening area in the first display area AA1 is smaller than the sub-pixel opening area in the second display area AA2. Along the first direction X, the maximum distance between the black matrix 3 in the first display area AA1 and the substrate 1 is set as d1, that is, the distance from the side of the black matrix 3 in the first display area AA1 far from the substrate to the surface of the substrate 1. The maximum distance between the black matrix 3 in the second display area AA2 and the substrate 1 is d2, that is, the distance from the side of the black matrix 3 in the second display area AA2 far from the substrate 1 to the surface of the substrate 1. d1 < d2. The angle formed by the light emitted from the sub-pixel opening area of the first display area AA1 and passing through the edge of the black matrix 3 and the first direction X is θ1. The height of this black matrix 3 is lower than the height of the black matrix 3 in the second display area AA2; the angle formed by the light emitted from the sub-pixel opening area of the first display area AA1 and passing through the edge of the black matrix 3 and the first direction X is θ2. The height of this black matrix 3 is equal to the height of the black matrix 3 in the second display area AA2. θ1 < θ2. That is, along the first direction X, reducing the maximum distance between the black matrix 3 and the substrate 1 can make the emission angle of the light emitted by the sub-pixels in the first display area AA1 larger, and can effectively improve the brightness of the first display area AA1.

[0045] Compared with the prior art, for the first display area AA1 of the display panel 100 provided in this embodiment and at least a part of the second display area AA2 surrounding the first display area AA1, the transmittance of the first display area AA1 is greater than the transmittance of the second display area AA2; the display panel 100 further includes: a substrate 1; a plurality of light-emitting units 2 located on one side of the substrate 1; a black matrix 3 located on the side of the light-emitting units 2 far from the substrate 1. Along the first direction X, the maximum distance between the black matrix 3 in the first display area AA1 and the substrate 1 is d1, and the maximum distance between the black matrix 3 in the second display area AA2 and the substrate 1 is d2. d1 < d2. The first direction X is perpendicular to the substrate 1. Since the transmittance of the first display area AA1 is greater than the transmittance of the second display area AA2, the brightness of the first display area AA1 is darker than the brightness of the second display area AA2. Setting d1 < d2 enables the large-angle light emitted by the sub-pixels in the first display area AA1 to be emitted, effectively improving the brightness of the first display area AA1, which helps to balance the brightness of the first display area AA1 and the second display area AA2 and achieve no difference in display between the first display area AA1 and the second display area AA2.

[0046] In some alternative embodiments, referring to Figure 3 and Figure 5 , Figure 5 is Figure 3Another sectional view in the B-B' direction. A color filter layer 9 is provided on the side of the black matrix 3 away from the substrate 1. In the first display area AA1, the height of the color filter layer 9 in the first direction X is M; in the second display area AA2, the height of the color filter layer 9 in the first direction X is N, and M < N.

[0047] It should be noted that the color filter layer 9 can include a red color filter, a green color filter, and a blue color filter. Different color filters can only transmit light of the corresponding color, that is, only red light can pass through the red color filter, only green light can pass through the green color filter, and only blue light can pass through the blue color filter. The color filter layer 9 has a certain thickness. When each color filter transmits light of the corresponding color, it will block it to a certain extent and will not allow the light to pass through completely. The thicker the color filter layer 9, the more obvious the effect of blocking light, that is, the smaller the transmittance.

[0048] It can be understood that Figure 5 In the figure, only the thickness M of the color filter layer 9 in the first display area AA1 is shown to be less than the thickness N of the color filter layer 9 in the second display area AA2 along the first direction X, so that the transmittance of the color filter layer 9 in the first display area AA1 is greater than that of the color filter layer 9 in the second display area AA2, increasing the light extraction efficiency of the first display area AA1, effectively improving the brightness of the first display area AA1, and helping to achieve no difference in display brightness between the first display area AA1 and the second display area AA2. Using the black matrix 3 and the color filter layer 9 in the organic display panel 100 can also replace the polarizer, further improving the light extraction efficiency, increasing the brightness of the display panel 100, and reducing the power consumption of the display panel 100.

[0049] Optionally, compare the thicknesses of the color filters of the same color. For example, compare the red color filter in the first display area AA1 with the red color filter in the second display area AA2. The thickness of the red color filter in the first display area AA1 is less than the thickness of the red color filter in the second display area AA2, so that the transmittance of the red color filter in the first display area AA1 is greater than that of the red color filter in the second display area AA2, increasing the light extraction efficiency of the red color filter in the first display area AA1. Of course, only the red color filter is taken as an example here, and it can also be a green color filter or a blue color filter, which is not limited here.

[0050] In some alternative embodiments, referring to Figure 3 、 Figure 6 and Figure 7 , Figure 6 is Figure 3 Another sectional view in the B-B' direction of Figure 7 is Figure 3Another cross-sectional view in the B-B' direction. The display panel 100 provided in this embodiment further includes: a light gain layer 10, including a plurality of light adjustment portions 11. Along the first direction X, the light adjustment portions 11 do not overlap with the light-emitting units 2. Along the first direction X, the minimum distance between the light adjustment portion 11 located in the first display area AA1 and the substrate 1 is D1, and the minimum distance between the light adjustment portion 11 located in the second display area AA2 and the substrate 1 is D2, and (d1 - d2) × (D1 - D2) ≤ 0.

[0051] It can be understood that Figure 6 only shows that the thickness of the color resist layer 9 in the first display area AA1 is equal to the thickness of the color resist layer 9 in the second display area AA2. It is also possible to set the thickness of the color resist layer 9 in the first display area AA1 to be not equal to the thickness of the color resist layer 9 in the second display area AA2. Since d1 < d2 has been clearly stated in the above embodiment, D1 ≥ D2. In Figure 6 only shows a case where D1 > D2. Among them, the height of the color resist layer 9 in the first display area AA1 along the first direction X is equal to the height of the color resist layer 9 in the second display area AA2 along the first direction X. Of course, it can also be further set that the height of the color resist layer 9 in the first display area AA1 along the first direction X is less than the height of the color resist layer 9 in the second display area AA2 along the first direction X. In Figure 7 only shows a case where D1 = D2. The light gain layer 10 is a film layer that can adjust the propagation path of light, and can extract large-angle light to improve the front light extraction efficiency of the display panel 100, which helps to improve the display effect of the display panel 100 and reduce the power consumption of the display panel 100.

[0052] In some alternative embodiments, continue to refer to Figure 3 and Figure 6 , D1 > D2.

[0053] It can be understood that along the first direction X, the minimum distance between the light adjustment portion 11 located in the first display area AA1 and the substrate 1 is D1, that is, D1 is the distance from the side of the light adjustment portion 11 in the first display area AA1 close to the substrate 1 to the surface of the substrate 1. The minimum distance between the light adjustment portion 11 located in the second display area AA2 and the substrate 1 is D2, that is, D2 is the distance from the side of the light adjustment portion 11 in the second display area AA2 close to the substrate 1 to the surface of the substrate 1. D1 > D2. Compared with the second display area AA2, in the first display area AA1, there is a larger space between the light adjustment portion 11 and the substrate 1, which is convenient for arranging the black matrix 3, reducing the maximum distance between the black matrix 3 in the first display area AA1 and the array substrate, increasing the light extraction efficiency of the first display area AA1, and realizing no difference in display brightness between the first display area AA1 and the second display area AA2.

[0054] In some alternative embodiments, with continued reference to Figure 3 and Figure 6 , within the first display area AA1, the optical gain layer 10 is located on the side of the color resist layer 9 away from the substrate 1; within the second display area AA2, the optical gain layer 10 is located between the black matrix 3 and the light-emitting unit 2.

[0055] It should be noted that Figure 6 only shows a specific position of the optical gain layer 10 in the display panel 100. Of course, within the first display area AA1, other film layers may exist between the optical gain layer 10 and the color resist layer 9, and / or within the second display area AA2, other film layers may exist between the optical gain layer 10 and the black matrix 3.

[0056] It can be understood that the color resist layer 9 and the black matrix 3 form the color filter layer 12. Compared with the second display area AA2, the positions of the optical gain layer 10 and the color filter layer 12 in the first display area AA1 are swapped. Since the optical gain layer 10 itself has the function of adjusting the propagation path of light, it can extract the light emitted at large angles and improve the front light extraction efficiency of the display panel 100. In the first display area AA1, the color filter layer 12 is arranged on the side of the optical gain layer 10 close to the substrate 1, so that light at a larger angle can be emitted, which can further improve the light extraction efficiency of the first display area AA1, increase the brightness of the first display area AA1, and achieve no difference in display brightness between the first display area AA1 and the second display area AA2. In addition, by swapping the positions of the optical gain layer 10 and the color filter layer 12 in the first display area AA1, after the optical gain layer 10 in the second display area AA2 is fabricated, the color filter layer 12 in the first display area AA1 and the color filter layer 12 in the second display area AA2 can be fabricated using the same process, simplifying the process flow.

[0057] In some alternative embodiments, with reference to Figure 3 , Figure 6 , Figure 8 and Figure 9 , Figure 8 is Figure 3 another cross-sectional view taken along the B-B' direction in Figure 9 is Figure 3 another cross-sectional view taken along the B-B' direction in , the light adjustment portion 11 includes a first surface 13 and a second surface 14 arranged opposite to each other, the first surface 13 is located on the side of the second surface 14 away from the substrate 1, the light adjustment portion 11 further includes a third surface 15, the third surface 15 is connected to the first surface 13 and the second surface 14 respectively, and the maximum included angle between the section plane of the third surface 15 and the substrate 1 is the first included angle; the first included angle α of the first display area AA1 is greater than the first included angle β of the second display area AA2.

[0058] It can be understood that in Figure 6Only the third surface 15 is schematically shown as an inclined surface, and in Figure 8 and Figure 9 only the third surface 15 is schematically shown as a curved surface. Specifically, the third surface 15 can also be set as a combination of a broken line and a curved surface, or a combination of multiple inclined surfaces, or a combination of multiple curved surfaces, which is not specifically limited here. The light gain layer 10 improves the light extraction efficiency by adjusting the propagation path of light. Specifically, when a part of the light contacts the third surface 15, the light is reflected at the third surface 15, so that this part of the light is emitted in a direction closer to perpendicular to the display panel 100, improving the front light extraction efficiency of the display panel 100; another part of the large-angle light is incident from the first surface 13 into the light adjusting portion 11 and refracts when exiting the light adjusting portion 11, and this part of the emitted light is emitted in a direction perpendicular to the display panel 100, realizing the extraction of large-angle light and also improving the front light extraction efficiency of the display panel 100. The first included angle α of the first display area AA1 is larger than the first included angle β of the second display area AA2, that is, the opening between adjacent light adjusting portions 11 in the first display area AA1 is larger, which can further improve the brightness of the first display area AA1, realizing that the display brightness of the first display area AA1 and the second display area AA2 is the same, and the display effect is better.

[0059] In some alternative embodiments, referring to Figure 3 and Figure 10 , Figure 10 is Figure 3 Another sectional view in the B-B' direction in

[0060] In the first display area AA1, a planarization layer 16 is provided between the light gain layer 10 and the color resist layer 9; along the first direction X, the maximum distance between the planarization layer 16 and the substrate 1 is U, and the maximum distance between the light gain layer 10 located in the second display area AA2 and the substrate 1 is V, and U = V.

[0061] In some alternative embodiments, continuing to refer to Figure 3 and Figure 10 , the light gain layer 10 includes an optical layer 17, the optical layer 17 covers the light adjusting portion 11, and the refractive index of the light adjusting portion 11 is less than the refractive index of the optical layer 17; the refractive index of the planarization layer 16 is less than or equal to the refractive index of the optical layer 17 located in the first display area AA1.

[0062] It can be understood that in Figure 10Only shown schematically in the first display area AA1, the planarization layer 16 is located between the color filter layer 12 and the light gain layer 10. The refractive index of the light adjustment part 11 in the light gain layer 10 is less than that of the optical layer 17. When light rays are incident from the light adjustment part 11 with a low refractive index to the optical layer 17 with a high refractive index, refraction occurs at the interface between the two, enabling large-angle light to exit smoothly and increasing the light extraction efficiency. Additionally, when light rays are incident from the light adjustment part 11 with a low refractive index to the optical layer 17 with a high refractive index, the light rays will exit in a direction closer to perpendicular to the display panel 100, which can improve the front light extraction efficiency of the display panel 100 and effectively increase the brightness of the first display panel 100. The refractive index of the planarization layer 16 is less than or equal to that of the optical layer 17 located in the first display area AA1, which can also cause refraction or reduce reflection of light rays at the planarization layer 16 and the optical layer 17, further increasing the light extraction efficiency and further achieving no difference in the display brightness between the first display panel 100 and the second display panel 100.

[0063] In some alternative embodiments, with continued reference to Figure 3 and Figure 10 , the planarization layer 16 and the optical layer 17 located in the second display area AA2 are integrally formed.

[0064] It can be understood that in Figure 10 only shown schematically that the thickness of the color resist layer 9 in the first display area AA1 is equal to that of the color resist layer 9 in the second display area AA2. Of course, it can also be set that the thickness of the color resist layer 9 in the first display area AA1 is not equal to that of the color resist layer 9 in the second display area AA2, and no specific limitation is made here. Integrally forming the planarization layer 16 and the optical layer 17 located in the second display area AA2 can simplify the manufacturing process, save time, facilitate the manufacturing of subsequent film layers, and save costs.

[0065] In some alternative embodiments, with reference to Figure 3 and Figure 11 , Figure 11 is Figure 3 Another cross-sectional view in the B - B' direction in

[0066] It can be understood that Figure 11Only the case where the light adjusting portion 11 is located below the black matrix 3 is schematically shown. The thickness of the color resist layer 9 in the first display area AA1 is equal to the thickness of the color resist layer 9 in the second display area AA2. Of course, the position of the light adjusting portion 11 can be adjusted according to requirements, and the thickness of the color resist layer 9 in the first display area AA1 can also be set to be unequal to the thickness of the color resist layer 9 in the second display area AA2, and no specific limitation is made here. Along the first direction X, the height of the light adjusting portion 11 located in the first display area AA1 from the substrate 1 is the same as the height of the light adjusting portion 11 located in the second display area AA2, and the production of the light adjusting portion 11 can be completed in the same process, simplifying the process flow and facilitating production.

[0067] In some alternative embodiments, with continued reference to Figure 3 and Figure 11 , the light gain layer 10 includes an optical layer 17, the optical layer 17 covers the light adjusting portion 11, and the refractive index of the light adjusting portion 11 is less than the refractive index of the optical layer 17; the refractive index of the optical layer 17 is equal to the refractive index of the color resist layer 9.

[0068] It can be understood that only the case where the light adjusting portion 11 is located below the black matrix 3 is schematically shown in Figure 11 . Specifically, how the light gain layer 10 extracts large-angle light has been described in detail in the above embodiments, and no further elaboration is made here. The refractive index of the optical layer 17 is equal to the refractive index of the color resist layer 9. The light adjusting portions 11 in the first display area AA1 and the second display area AA2 are at the same height, and the height of the light adjusting portion 11 in the first display area AA1 along the first direction X is equal to the height of the light adjusting portion 11 in the second display area AA2 along the first direction X. When light travels from the light adjusting portion 11 with a low refractive index to the optical layer 17 with a high refractive index, light extraction occurs at the same height in both the first display area AA1 and the second display area AA2, and the light extraction effects are the same. When the refractive index of the optical layer 17 is not equal to the refractive index of the color resist layer 9, when light travels from the optical layer 17 to the color resist layer 9, the light will be reflected at the junction of the optical layer 17 and the color resist layer 9. Therefore, setting the refractive index of the optical layer 17 equal to the refractive index of the color resist layer 9 can improve the antireflection ability and reduce ambient light reflection.

[0069] In some alternative embodiments, with continued reference to Figure 3 and Figure 7 , in the first display area AA1, the black matrix 3 is located between the light adjusting portion 11 and the optical layer 17, and the optical layer 17 is reused for the color resist layer 9.

[0070] It can be understood that in Figure 7Only the reuse of the optical layer 17 for the color resist layer 9 in the first display area AA1 is schematically shown, which can reduce the number of film layers in the first display area AA1, reduce light loss, further improve the brightness of the first display area AA1, achieve no difference in display between the first display area AA1 and the second display area AA2, and can also reduce the thickness of the entire display panel 100 along the first direction X, realizing the thinning of the display panel 100.

[0071] In some alternative embodiments, the refractive index of the light regulating part 11 is less than or equal to 1.5, and the refractive index of the optical layer 17 is greater than or equal to 1.65.

[0072] It can be understood that when light passes through the light regulating part 11 with a low refractive index and enters the optical layer 17 with a high refractive index, the light can be refracted towards the direction close to perpendicular to the display panel 100, so that a part of the large-angle light that may be lost passes through the light gain layer 10 and exits the panel along the direction close to perpendicular to the display panel 100, realizing the extraction of large-angle light, increasing the light output, and increasing the brightness of the first display area AA1.

[0073] In some alternative embodiments, the material of the light regulating part 11 includes acrylate-based organic substances, and the optical layer 17 includes metal oxide nanoparticles.

[0074] It can be understood that the materials of both the optical layer 17 and the light regulating part 11 are materials with high transmittance, reducing the loss of light when passing through the light gain layer 10.

[0075] In some alternative embodiments, the particle size of the metal oxide nanoparticles is less than 100 nm.

[0076] It can be understood that zirconia is generally used for the metal oxide nanoparticles. Using metal oxide nanoparticles with a particle size less than 100 nm can increase the refractive index of the optical layer.

[0077] In some alternative embodiments, with continued reference to Figure 3 and Figure 7 , the light regulating part 11 includes a first surface 13 and a second surface 14 which are oppositely arranged. The first surface 13 is located on the side of the second surface 14 away from the substrate 1. The light regulating part 11 further includes a third surface 15. The third surface 15 is connected to the first surface 13 and the second surface 14 respectively. The maximum included angle between the section plane of the third surface 15 and the substrate 1 is the first included angle α.

[0078] It can be understood that Figure 7Only the third surface 15 is schematically shown as an inclined surface in the figure. Specifically, the third surface 15 can also be set as a curved surface, or a combination of a broken line and a curved surface, or a combination of multiple inclined surfaces, or a combination of multiple curved surfaces, which are not specifically limited herein. By setting the third surface 15 as an inclined surface, part of the light contacts the third surface 15 and is reflected and emitted in a direction closer to being perpendicular to the display panel 100, while the light entering the light adjusting part 11 from the first surface 13 is refracted at the interface between the light adjusting part 11 and the optical layer 17, so that the light is emitted in a direction closer to being perpendicular to the display panel 100, realizing the extraction of large-angle light, improving the front light-emitting efficiency of the display panel 100, effectively increasing the brightness of the first display area AA1, and realizing that the display brightness of the first display area AA1 and the second display area AA2 is the same.

[0079] In some alternative embodiments, with continued reference to Figure 3 and Figure 7 , the included angle range of the first included angle α is 65° to 85°.

[0080] It can be understood that when the first included angle α is less than 65°, some of the light passing through the light adjusting part 11 cannot contact the third surface 15 and thus cannot be reflected, resulting in light loss; when the first included angle α is greater than 85°, although some of the light contacts the third surface 15 and is reflected, the reflected light cannot be emitted in a direction closer to being perpendicular to the display panel 100, which also causes light loss. And setting the range of the first included angle α to be 65° to 85° has less influence on the color deviation, brightness, etc. of the display panel 100 under a large viewing angle, which is more reasonable. Therefore, setting the range of the first included angle α to be 65° to 85° is the optimal choice, but it is not limited thereto.

[0081] In some alternative embodiments, please refer to Figure 12 , Figure 12 is a schematic plan view of a display device 200 provided by an embodiment of the present invention. The display device 200 provided in this embodiment includes the display panel 100 provided by the above embodiment of the present invention. Figure 12 This embodiment only takes a mobile phone as an example to illustrate the display device 200. It can be understood that the display device 200 provided by the embodiment of the present invention can be other display devices 200 with a display function such as a computer, a television, a vehicle-mounted display device 200, etc., and the present invention does not make specific limitations thereto. The display device 200 provided by the embodiment of the present invention has the beneficial effects of the display panel 100 provided by the embodiment of the present invention. For the specific description of the display panel 100, reference can be made to the above embodiments, and details are not described herein again.

[0082] It can be seen from the above embodiments that the display panel and the display device provided by the present invention at least achieve the following beneficial effects:

[0083] For the first display area of the display panel provided by the present invention and at least part of the second display area surrounding the first display area, the transmittance of the first display area is greater than that of the second display area; the display panel further includes: a substrate; a plurality of light-emitting units located on one side of the substrate; a black matrix located on the side of the light-emitting units away from the substrate. In the first direction, which is perpendicular to the substrate, the maximum distance between the black matrix in the first display area and the substrate is d1, and the maximum distance between the black matrix in the second display area and the substrate is d2, where d1 < d2. Since the transmittance of the first display area is greater than that of the second display area, the brightness of the first display area is darker than that of the second display area. By setting d1 < d2, the large-angle light emitted by the sub-pixels in the first display area can be emitted, effectively improving the brightness of the first display area, helping to balance the brightness of the first display area and the second display area, and achieving no difference in the display brightness between the first display area and the second display area.

[0084] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A display panel, characterized in that, Comprising: A first display area and a second display area at least partially surrounding the first display area, the transmittance of the first display area being greater than the transmittance of the second display area; The display panel further comprises: A substrate; A plurality of light-emitting units located on one side of the substrate; A black matrix located on the side of the light-emitting units away from the substrate. In the first direction (the first direction is perpendicular to the substrate), the maximum distance between the black matrix in the first display area and the substrate is d1, and the maximum distance between the black matrix in the second display area and the substrate is d2, where d1 < d2; A color-resist layer is provided on the side of the black matrix away from the substrate; A light-gain layer comprising a plurality of light-adjusting portions. In the first direction, the light-adjusting portions do not overlap with the light-emitting units; in the first direction, the minimum distance between the light-adjusting portions in the first display area and the substrate is D1, and the minimum distance between the light-adjusting portions in the second display area and the substrate is D2, and (d1 - d2)×(D1 - D2) ≤ 0.

2. The display panel according to claim 1, wherein In the first display area, the height of the color-resist layer in the first direction is M; in the second display area, the height of the color-resist layer in the first direction is N, where M < N.

3. The display panel according to claim 1, wherein: D1 > D2.

4. The display panel according to claim 3, wherein In the first display area, the light-gain layer is located on the side of the color-resist layer away from the substrate; in the second display area, the light-gain layer is located between the black matrix and the light-emitting units.

5. The display panel according to claim 4, wherein The light-adjusting portion comprises a first surface and a second surface arranged opposite to each other, the first surface being on the side of the second surface away from the substrate, and the light-adjusting portion further comprises a third surface that is connected to the first surface and the second surface respectively, and the maximum included angle between the section plane of the third surface and the substrate is a first included angle; The first included angle of the first display area is greater than the first included angle of the second display area.

6. The display panel according to claim 4, wherein In the first display area, a planarization layer is provided between the light-gain layer and the color-resist layer; In the first direction, the maximum distance between the planarization layer and the substrate is U, and the maximum distance between the light-gain layer in the second display area and the substrate is V, where U = V.

7. The display panel according to claim 6, wherein: The light-gain layer comprises an optical layer that covers the light-adjusting portion, and the refractive index of the light-adjusting portion is less than the refractive index of the optical layer; The refractive index of the planarization layer is less than or equal to the refractive index of the optical layer in the first display area.

8. The display panel according to claim 6, wherein The light-gain layer comprises an optical layer that covers the light-adjusting portion, and the planarization layer and the optical layer in the second display area are integrally formed.

9. The display panel according to claim 1, wherein: D1 = D2.

10. The display panel according to claim 9, wherein: The light gain layer includes an optical layer that covers the light adjusting portion, and the refractive index of the light adjusting portion is less than that of the optical layer; The refractive index of the optical layer is equal to that of the color resist layer.

11. The display panel according to claim 10, wherein In the first display area, the black matrix is located between the light adjusting portion and the optical layer, and the optical layer is reused as the color resist layer.

12. The display panel according to claim 9, wherein The light gain layer includes an optical layer that covers the light adjusting portion, the refractive index of the light adjusting portion is less than or equal to 1.5, and the refractive index of the optical layer is greater than or equal to 1.

65.

13. The display panel according to claim 9, wherein The light gain layer includes an optical layer that covers the light adjusting portion, the material of the light adjusting portion includes acrylate organic compounds, and the optical layer includes metal oxide nanoparticles.

14. The display panel according to claim 13, wherein The particle size of the metal oxide nanoparticles is less than 100 nm.

15. The display panel according to claim 1, wherein The light adjusting portion includes a first surface and a second surface that are oppositely arranged, the first surface is located on the side of the second surface away from the substrate, the light adjusting portion further includes a third surface, the third surface is connected to the first surface and the second surface respectively, and the maximum included angle between the section plane of the third surface and the substrate is a first included angle.

16. The display panel according to claim 15, wherein The included angle range of the first included angle is 65° to 85°.

17. A display device, characterized in that, A display panel including any one of the above claims 1-16.

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