Display panel and manufacturing method therefor, and display device

Abstract

The present application relates to the technical field of display, and discloses a display panel and a manufacturing method therefor, and a display device. The display panel comprises a base substrate, a pixel definition layer, a plurality of pixel units, a color filter layer, a first dimming layer and a second dimming layer. The refractive index of the first dimming layer is different from that of the second dimming layer. A target surface of a target part of the first dimming layer is at least part of a surface of an interface between the second dimming layer and the target part, and the target surface is used for refracting or totally reflecting light from the side of the second dimming layer away from the base substrate. Therefore, wide-angle ambient light can be refracted or totally reflected by the target surface without designing a large second hollowed-out area and a large third hollowed-out area, so that the amount of light incident on an ambient light sensor can be ensured, thereby ensuring the normal use of the ambient light sensor.

Description

Display panel and manufacturing method thereof, and display device Technical Field

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

[0002] The display panel includes a base substrate and pixel units located in a display area of ​​the base substrate, wherein the pixel units can emit light to realize display on the display panel.

[0003] Summary of the Invention

[0004] This application provides a display panel, a method for manufacturing the same, and a display device. The technical solution is as follows:

[0005] In one aspect, a display panel is provided, comprising:

[0006] A base substrate having a display area;

[0007] a pixel defining layer, the pixel defining layer being located on one side of the base substrate and having a plurality of first hollow regions and a plurality of second hollow regions;

[0008] a plurality of pixel units corresponding to the plurality of first hollow regions, the plurality of pixel units being located in the display region, and a light emitting region of each of the pixel units being located in a corresponding first hollow region;

[0009] a color filter layer located on a side of the plurality of pixel units away from the base substrate, the color filter layer comprising a plurality of color resist blocks corresponding to the plurality of pixel units, and a black matrix located between the plurality of color resist blocks, the orthographic projections of the color resist blocks on the base substrate covering the orthographic projections of the light-emitting areas of the pixel units on the base substrate, light emitted by the pixel units exiting from the corresponding color resist blocks, the black matrix comprising a plurality of third hollow areas corresponding to the plurality of second hollow areas, the orthographic projections of the third hollow areas on the base substrate overlapping the orthographic projections of the corresponding second hollow areas on the base substrate;

[0010] A first dimming layer and a second dimming layer are located on a side of the color filter layer away from the base substrate, the refractive index of the first dimming layer is different from the refractive index of the second dimming layer, the orthographic projection of the target part of the first dimming layer on the base substrate is located within the orthographic projection of the third hollow area on the base substrate, the second dimming layer covers the target part of the first dimming layer, the target surface of the surface of the target part away from the black matrix intersects and is not perpendicular to the surface of the black matrix away from the base substrate, and the target surface is at least a portion of the surface of the interface between the second dimming layer and the target part, and is used to refract or totally reflect light from the side of the second dimming layer away from the base substrate.

[0011] Optionally, the refractive index of the first dimming layer is greater than the refractive index of the second dimming layer; the first dimming layer includes a dimming pattern, and the orthographic projection of the dimming pattern on the base substrate covers the orthographic projection of the third hollow area on the base substrate;

[0012] The target surface is used to refract light from a side of the second dimming layer away from the base substrate.

[0013] Optionally, the dimming pattern includes: a first dimming portion located in the third hollow area, and a second dimming portion located on a side of the first dimming portion away from the base substrate;

[0014] The surface of the second dimming portion away from the base substrate is a curved surface; or the surface of the second dimming portion away from the base substrate is a trapezoidal surface; or the surface of the second dimming portion away from the base substrate is a triangular surface.

[0015] Optionally, the height of the second dimming part ranges from 2 microns to 4 microns.

[0016] Optionally, the refractive index of the first dimming layer is in a range of 1.6 to 1.8, and the refractive index of the second dimming layer is in a range of 1.3 to 1.5;

[0017] The difference between the refractive index of the first dimming layer and the refractive index of the second dimming layer ranges from 0.1 to 0.3.

[0018] Optionally, the refractive index of the first dimming layer is smaller than the refractive index of the second dimming layer; the first dimming layer has an opening, and the orthographic projection of the opening on the base substrate is located within the orthographic projection of the third hollow area on the base substrate;

[0019] The surface of the opening is the target surface, and the target surface is used for total reflection of light from a side of the second dimming layer away from the base substrate.

[0020] Optionally, the first dimming layer includes a third dimming portion covering a sidewall of the third hollow region, and a surface of the third dimming portion away from the sidewall of the third hollow region is the target surface;

[0021] The angle between the target surface and the surface of the black matrix away from the base substrate ranges from 45 degrees to 85 degrees.

[0022] Optionally, the third dimming portion is further located on a side of the black matrix away from the base substrate, and a thickness of the third dimming portion located on a side of the black matrix away from the base substrate ranges from 1 micron to 3 microns.

[0023] Optionally, the refractive index of the first dimming layer is in a range of 1.3 to 1.5, and the refractive index of the second dimming layer is in a range of 1.6 to 1.8;

[0024] The difference between the refractive index of the second dimming layer and the refractive index of the first dimming layer is in a range of 0.1 to 0.3.

[0025] Optionally, the multiple pixel units include an anode layer, a light-emitting layer, and a cathode layer, the anode layer includes multiple anode patterns, the light-emitting layer includes multiple light-emitting patterns, each of the first hollow regions exposes at least a portion of the anode pattern, at least a portion of the light-emitting pattern is located within the first hollow region and contacts the anode pattern exposed in the first hollow region, the cathode layer covers the multiple light-emitting patterns and contacts the multiple light-emitting patterns, and the orthographic projection of the cathode layer on the base substrate covers the orthographic projections of the multiple second hollow regions on the base substrate;

[0026] The display panel further includes: a third dimming layer, the third dimming layer including a plurality of dimming structures corresponding to the plurality of second hollow areas, at least a portion of each dimming structure being located within a corresponding second hollow area, and an orthographic projection of each dimming structure on the base substrate covering an orthographic projection of the second hollow area on the base substrate;

[0027] Wherein, the refractive index of the dimming structure is greater than the refractive index of the cathode layer.

[0028] Optionally, the dimming structure includes a fourth dimming portion located in the second hollow area, and a fifth dimming portion located on a side of the fourth dimming portion away from the base substrate;

[0029] The surface of the fifth dimming portion away from the base substrate is a curved surface; or the surface of the fifth dimming portion away from the base substrate is a trapezoidal surface.

[0030] Optionally, the height of the fifth dimming part ranges from 1.5 microns to 4 microns.

[0031] Optionally, the orthographic projection of each of the plurality of second hollow regions on the base substrate is located between the orthographic projections of two adjacent first hollow regions on the base substrate.

[0032] Optionally, the base substrate further has a peripheral area surrounding the display area; the display panel further comprises: an encapsulation film layer located on a side of the plurality of pixel units away from the base substrate;

[0033] The encapsulation film layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence, the first inorganic encapsulation layer and the second inorganic encapsulation layer are located in the display area and the peripheral area, and the organic encapsulation layer is located in the display area;

[0034] The portion of the second inorganic encapsulation layer located in the display area and away from the surface of the base substrate is a plane, and the color filter layer is located on the plane.

[0035] Optionally, the display panel further includes a buffer layer, an active layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer dielectric layer, a first source and drain electrode layer, a first planarizing layer, a second source and drain electrode layer, a second planarizing layer, an anode layer, the pixel defining layer, a supporting layer, a light-emitting layer, a cathode layer, and an encapsulation film layer, which are sequentially stacked in a direction away from the base substrate;

[0036] Among them, each of the pixel units includes a pixel circuit and a light-emitting unit, each of the pixel circuits is used to provide a driving signal for the corresponding light-emitting unit, and the active layer, the first gate layer, the second gate layer, the first source and drain layer and the second source and drain layer are used to constitute multiple pixel circuits included in the multiple pixel units.

[0037] In another aspect, a method for preparing a display panel is provided, the method comprising:

[0038] obtaining a substrate;

[0039] A plurality of pixel units and a pixel defining layer are formed on one side of the base substrate, wherein the pixel defining layer has a plurality of first hollow regions and a plurality of second hollow regions, the plurality of pixel units correspond to the plurality of first hollow regions and are located in the display area, and the light emitting area of ​​each pixel unit is located in the corresponding first hollow region;

[0040] A color filter layer is formed on a side of the plurality of pixel units away from the base substrate, the color filter layer including a plurality of color resist blocks corresponding to the plurality of pixel units, and a black matrix located between the plurality of color resist blocks, wherein the orthographic projections of the color resist blocks on the base substrate cover the orthographic projections of the light-emitting areas of the pixel units on the base substrate, and light emitted by the pixel units is emitted from the corresponding color resist blocks, and the black matrix includes a plurality of third hollow areas corresponding to the plurality of second hollow areas, wherein the orthographic projections of the third hollow areas on the base substrate overlap with the orthographic projections of the corresponding second hollow areas on the base substrate;

[0041] forming a first dimming layer on a side of the color filter layer away from the base substrate, wherein an orthographic projection of a target portion of the first dimming layer on the base substrate is located within an orthographic projection of the third hollow region on the base substrate, and a target surface of a surface of the target portion away from the black matrix intersects and is not perpendicular to a surface of the black matrix away from the base substrate;

[0042] A second dimming layer is formed on a side of the first dimming layer away from the base substrate, the second dimming layer covers the target portion, the refractive index of the second dimming layer is different from the refractive index of the first dimming layer, and the target surface is at least a portion of the surface of the interface between the second dimming layer and the target portion, and is used to refract or totally reflect light from the side of the second dimming layer away from the base substrate.

[0043] Optionally, after forming the pixel defining layer and before forming the cathode layer of the light emitting unit of the plurality of pixel units, the method further includes:

[0044] forming a third dimming layer, the third dimming layer comprising a plurality of dimming structures corresponding to the plurality of second hollow regions, at least a portion of each dimming structure being located within the corresponding second hollow region, and an orthographic projection of each dimming structure on the base substrate covering an orthographic projection of the second hollow region on the base substrate;

[0045] Wherein, the refractive index of the dimming structure is greater than the refractive index of the cathode layer.

[0046] In another aspect, a display device is provided, wherein an orthographic projection of the ambient light sensor on the base substrate of the display panel is located within an orthographic projection of a second hollowed-out region of a pixel defining layer in the display panel on the base substrate, and is located within an orthographic projection of a third hollowed-out region of a black matrix in the display panel on the base substrate;

[0047] The ambient light sensor is configured to receive or reflect light from a side of the second dimming layer away from the base substrate through the second hollow area and the third hollow area. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0050] FIG1 is a partial cross-sectional schematic diagram of a display panel in the related art;

[0051] FIG2 is a partial cross-sectional schematic diagram of another display panel in the related art;

[0052] FIG3 is a partial cross-sectional schematic diagram of another display panel in the related art;

[0053] FIG4 is a partial cross-sectional schematic diagram of a display panel provided in an embodiment of the present application;

[0054] FIG5 is a top view of a substrate provided in an embodiment of the present application;

[0055] FIG6 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0056] FIG7 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0057] FIG8 is a partial top view of a display panel provided in an embodiment of the present application;

[0058] FIG9 is a partial top view of a color block and a first dimming layer provided in an embodiment of the present application;

[0059] FIG10 is a partial top view of a pixel defining layer provided in an embodiment of the present application;

[0060] FIG11 is a partial top view of a black matrix provided in an embodiment of the present application;

[0061] FIG12 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0062] FIG13 is a partial top view of another display panel provided in an embodiment of the present application;

[0063] FIG14 is a partial top view of a color block and a first dimming layer provided in an embodiment of the present application;

[0064] FIG15 is a partial top view of another pixel defining layer provided in an embodiment of the present application;

[0065] FIG16 is a partial top view of another black matrix provided in an embodiment of the present application;

[0066] FIG17 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0067] FIG18 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0068] FIG19 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0069] FIG20 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0070] FIG21 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0071] FIG22 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0072] FIG23 is a partial cross-sectional schematic diagram of another display panel provided in an embodiment of the present application;

[0073] FIG24 is a schematic diagram of a triangular surface provided in an embodiment of the present application;

[0074] FIG25 is a schematic diagram of an arc-shaped surface provided in an embodiment of the present application;

[0075] FIG26 is a flow chart of a method for manufacturing a display panel provided in an embodiment of the present application;

[0076] FIG27 is a schematic structural diagram of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0077] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0078] In the related art, in order to improve the transmittance of the display panel and make the display panel thinner, a solution without a polarizer (POL) is adopted, for example, by replacing the polarizer arranged on the upper side of the pixel unit in the display panel with a color filter on encapsulation (COE) technology. Among them, the color filter layer includes a black matrix and a plurality of color blocks of different colors. The black matrix is ​​used to absorb external ambient light, and the color block is used to filter and emit light of corresponding colors. Furthermore, in order to reduce the reflectivity of the display panel to external ambient light in the solution where the display panel includes a color filter layer, it is necessary to design the material of the pixel definition layer in the display panel to be a black light-absorbing material. When the external ambient light is irradiated on the pixel definition layer, it is absorbed, preventing the light from being reflected to the display surface and affecting the display effect of the display panel. In addition, the display device may include an ambient light sensor located on the non-display surface of the display panel. Such an ambient light sensor needs to receive and reflect the external ambient light to realize the normal function of the sensor. Therefore, it is necessary to design openings for light transmission on the black matrix and the pixel definition layer, and the ambient light sensor can receive and reflect external ambient light through the openings.

[0079] However, if the size of the openings designed on the black matrix and pixel definition layer is too large, they will be easily noticed by the naked eye, affecting the user experience; if the size of the openings designed on the black matrix and pixel definition layer is too small, the transmittance of ambient light will be insufficient and cannot meet the normal use of the ambient light sensor.

[0080] In the related art, the electrodes in an organic light-emitting diode (OLED) display panel reflect ambient light. When the ambient light intensity is strong, the display effect and contrast of the display panel will be greatly reduced due to the effect of the light reflected by the electrodes, making it difficult for users to see the image on the display panel clearly.

[0081] In order to solve the above problems, Figure 1 is a partial cross-sectional schematic diagram of a display panel in the related art. Referring to Figure 1, a polarizer is designed in the display panel, and the polarizer is used to change the direction of light. When the ambient light passes through the polarizer and the 1 / 4 wave plate, it will be modulated into circularly polarized light. The circularly polarized light is reflected by the electrode in the display panel and its direction is changed. After passing through the 1 / 4 wave plate, it will be modulated into linearly polarized light with a direction opposite to the polarization direction of the polarizer. Since the linearly polarized light cannot pass through the polarizer, the reflection effect of the electrode on the ambient light is reduced. The addition of the polarizer means better contrast and color cast performance, but it will reduce the luminous efficiency, the transmittance is low, and the display panel is thicker.

[0082] Furthermore, in order to improve the transmittance of the display panel and make the display panel thinner, referring to Figure 2, no polarizer is designed in the display panel, but a color filter layer COE is used to reduce the reflection of ambient light. Among them, the color filter layer COE includes a plurality of color blocks corresponding to the pixel units, and a black matrix (BM) located between the plurality of color blocks. In the scheme shown in Figure 2, the black matrix has a strong absorption effect on light, and the ambient light will not return when it hits it. The color block can filter out light of a specific color. When the ambient light passes through the color block, it will show light of the corresponding color. Light can be reflected when it hits the electrode of the display panel. During the reflection process, part of the light will be absorbed by the black matrix, and the other part of the light will pass through the color block and be reflected to the outside world. In addition, in order to further improve the absorption of light, the pixel definition layer in the display panel is set to a black light-absorbing material. When light is irradiated to the pixel definition layer, it is absorbed by the pixel definition layer.

[0083] Referring to Figure 3, in a display panel designed with COE, it is necessary to design openings for light transmission (which can be called sensor holes) on the black matrix and pixel definition layer. The ambient light sensor located on the lower side of the substrate receives and reflects external ambient light through the openings, thereby realizing the function of the under-screen ambient light sensor.

[0084] However, a larger sensor hole size increases ambient light transmittance, which is beneficial for the under-display ambient light sensor. However, it also makes it easier for the naked eye to detect, resulting in a poor user experience. A smaller sensor hole size results in insufficient ambient light transmittance, making it unsuitable for normal use of the ambient light sensor.

[0085] Figure 4 is a partial cross-sectional diagram of a display panel provided in an embodiment of the present application. Referring to Figure 4 , the display panel 10 includes: a base substrate 101, a pixel definition layer 102, a plurality of pixel units 103, a color filter layer 104, a first dimming layer 105, and a second dimming layer 106. Optionally, the pixel definition layer 102 may be made of a black light-absorbing material, referred to as a black pixel definition layer (black PDL).

[0086] Referring to FIG5 , a base substrate 101 has a display area 101a. Referring to FIG4 and FIG5 , a pixel defining layer 102 is located on one side of the base substrate 101 and includes a plurality of first hollow regions 102a and a plurality of second hollow regions 102b. A plurality of pixel units 103 correspond to the plurality of first hollow regions 102a. The plurality of pixel units 103 are located in the display area 101a, and the light-emitting area of ​​each pixel unit 103 is located within the corresponding first hollow region 102a.

[0087] The color filter layer 104 is located on a side of the multiple pixel units 103 away from the base substrate 101. The color filter layer 104 includes multiple color resist blocks 1041 corresponding to the multiple pixel units 103, and a black matrix 1042 located between the multiple color resist blocks 1041. The orthographic projections of the color resist blocks 1041 on the base substrate 101 overlap the orthographic projections of the light-emitting areas of the pixel units 103 on the base substrate 101. Light emitted by the pixel units 103 is emitted from the corresponding color resist blocks 1041. The black matrix 1042 includes multiple third hollow areas 1042a corresponding to the multiple second hollow areas 102b. The orthographic projections of the third hollow areas 1042a on the base substrate 101 overlap with the orthographic projections of the corresponding second hollow areas 102b on the base substrate 101. The second hollow areas 102b and the third hollow areas 1042a can form sensor holes. The external environment can be incident on the ambient light sensor under the screen through the third hollow area 1042a and the second hollow area 102b, so as to realize the normal use of the ambient light sensor.

[0088] The first dimming layer 105 and the second dimming layer 106 are located on the side of the color filter layer 104 away from the base substrate 101. The refractive index of the first dimming layer 105 and the refractive index of the second dimming layer 106 are different. The orthographic projection of the target portion of the first dimming layer 105 on the base substrate 101 is located within the orthographic projection of the third hollow area 1042a on the base substrate 101, and the second dimming layer 106 covers the target portion of the first dimming layer 105. The target surface M of the target portion away from the black matrix 1042 intersects and is not perpendicular to the surface of the black matrix 1042 away from the base substrate 101. The target surface M is at least a portion of the interface between the second dimming layer 106 and the target portion. The target surface M is used to refract or totally reflect light from the side of the second dimming layer 106 away from the base substrate 101. Optionally, the material of the first dimming layer 105 and the second dimming layer 106 can be OC adhesive.

[0089] In the embodiment of the present application, if the refractive index of the first dimming layer 105 is greater than the refractive index of the second dimming layer 106, external ambient light can be refracted by the target surface M, and the refracted light can be illuminated by the ambient light sensor. The target surface M can refract ambient light at large angles. Therefore, even when the sensor aperture is small, the amount of light incident on the ambient light sensor can be guaranteed, ensuring the normal operation of the ambient light sensor.

[0090] If the refractive index of the first dimming layer 105 is lower than that of the second dimming layer 106, ambient light can be totally reflected by the target surface M, and the reflected light can be directed to the ambient light sensor. The target surface M can totally reflect ambient light at large angles, so even with a small sensor aperture, the amount of light incident on the ambient light sensor can be guaranteed, ensuring normal operation of the ambient light sensor.

[0091] In summary, an embodiment of the present application provides a display panel, which includes a base substrate, a pixel defining layer, a plurality of pixel units, a color filter layer, a first dimming layer, and a second dimming layer. The first dimming layer and the second dimming layer have different refractive indices. The target surface of the target portion of the first dimming layer is at least a portion of the surface of the interface between the second dimming layer and the target portion, and the target surface is used to refract or totally reflect light from the side of the second dimming layer away from the base substrate. Therefore, there is no need to design the second hollow area and the third hollow area to be larger, so that ambient light at a large angle can be refracted or totally reflected by the target surface, thereby ensuring the amount of light incident on the ambient light sensor and ensuring the normal use of the ambient light sensor.

[0092] As an optional implementation, referring to FIG4 , the refractive index of the first dimming layer 105 is greater than the refractive index of the second dimming layer 106. The first dimming layer 105 includes a first dimming pattern 1051. The orthographic projection of the first dimming pattern 1051 on the base substrate 101 overlaps the orthographic projection of the third hollowed-out area 1042a on the base substrate 101. The target surface M is used to refract light from the side of the second dimming layer 106 away from the base substrate 101.

[0093] Because the refractive index of the first dimming layer 105 is greater than that of the second dimming layer 106, light incident from the side of the second dimming layer 106 away from the base substrate 101 can be refracted at the interface between the first dimming layer 105 and the second dimming layer 106. Furthermore, the refraction angle is smaller than the incident angle, which means that light with a wide viewing angle can be converged.

[0094] 4 , the first dimming pattern 1051 includes a first dimming portion 10511 located within the third hollowed-out region 1042a, and a second dimming portion 10512 located on a side of the first dimming portion 10511 away from the base substrate 101. Optionally, referring to FIG4 , the surface of the second dimming portion 10512 away from the base substrate 101 is a curved surface; alternatively, referring to FIG6 , the surface of the second dimming portion 10512 away from the base substrate 101 is a trapezoidal surface; or alternatively, referring to FIG7 , the surface of the second dimming portion 10512 away from the base substrate 101 is a triangular surface.

[0095] 4, 6 and 7, the height of the second dimming portion 10512 ranges from 2 μm (micrometers) to 4 μm. The second dimming portion 10512 within this height range can better refract light. For example, the height of the second dimming portion 10512 can be 3 μm.

[0096] Optionally, the refractive index of the first dimming layer 105 is in a range of 1.6 to 1.8, for example, 1.7. The refractive index of the second dimming layer 106 is in a range of 1.3 to 1.5, for example, 1.4. The difference between the refractive index of the first dimming layer 105 and the refractive index of the second dimming layer 106 is in a range of 0.1 to 0.3.

[0097] Generally speaking, the greater the difference between the refractive index of the first dimming layer 105 and the refractive index of the second dimming layer 106, the better the refraction effect of light at the interface between the first dimming layer 105 and the second dimming layer 106, which can increase the available ambient light and ensure the amount of light incident on the ambient light sensor.

[0098] 8 to 11 , the orthographic projection of each of the plurality of second hollow regions 102b on the base substrate 101 is located between the orthographic projections of two adjacent first hollow regions 102a on the base substrate 101. Thus, the second hollow regions 102b are prevented from affecting the light emission of the pixel unit 103.

[0099] Moreover, the orthographic projection of the first dimming pattern 1051 on the base substrate covers the orthographic projection of the third hollow area 1042 a on the base substrate 101 , and covers the orthographic projection of the second hollow area 102 b on the base substrate 101 .

[0100] As another optional implementation, referring to FIG12 , the refractive index of the first dimming layer 105 is less than the refractive index of the second dimming layer 106. The first dimming layer 105 has an opening K, and the orthographic projection of the opening K on the base substrate 101 is located within the orthographic projection of the third hollow region 1042a on the base substrate 101. In other words, at least a portion of the first dimming layer 105 is located within the third hollow region 1042a and covers the sidewalls of the third hollow region 1042a.

[0101] The surface of the opening K is a target surface M, and the target surface M is used for total reflection of light from a side of the second dimming layer 106 away from the base substrate 101 .

[0102] Referring to FIG. 12 , the first dimming layer 105 includes a third dimming portion 1052 covering the sidewalls of the third hollow region 1042 a. The surface of the third dimming portion 1052 away from the sidewalls of the third hollow region 1042 a serves as a target surface M. The angle between the target surface M and the surface of the black matrix 1042 away from the base substrate 101 ranges from 45° to 85°. This angle allows light to be refracted by the target surface M toward the third hollow region 1042 a when it strikes the target surface M, thereby increasing the amount of light incident on the ambient light sensor.

[0103] Furthermore, the third dimming portion 1052 is located on the side of the black matrix 1042 away from the base substrate 101, and the thickness of the portion of the third dimming portion 1052 located on the side of the black matrix 1042 away from the base substrate 101 ranges from 1 μm to 3 μm. In other words, the thickness of the portion of the third dimming portion 1052 located on the side of the black matrix 1042 away from the base substrate 101 cannot be too thin, otherwise the third dimming portion 1052 may not cover the sidewalls of the third hollow region 1042a, and thus may not achieve the effect of refraction of light.

[0104] Optionally, the refractive index of the first dimming layer 105 is in a range of 1.3 to 1.5, for example, 1.4. The refractive index of the second dimming layer 106 is in a range of 1.6 to 1.8, for example, 1.7. The difference between the refractive index of the first dimming layer 105 and the refractive index of the second dimming layer 106 is in a range of 0.1 to 0.3.

[0105] Generally speaking, the greater the difference between the refractive index of the first dimming layer 105 and the refractive index of the second dimming layer 106, the better the refraction effect of light at the interface between the first dimming layer 105 and the second dimming layer 106, which can increase the available ambient light and ensure the amount of light incident on the ambient light sensor.

[0106] With reference to Figures 13 to 16 , the orthographic projection of each of the plurality of second hollowed-out regions 102b on the base substrate 101 is located between the orthographic projections of two adjacent first hollowed-out regions 102a on the base substrate 101. This prevents the second hollowed-out regions 102b from affecting the light emission of the pixel unit 103. Furthermore, the orthographic projection of the opening K on the base substrate 101 is located within the orthographic projection of the third hollowed-out region 1042a on the base substrate 101.

[0107] In the embodiment of the present application, referring to Figures 4, 6 to 8, and 12, multiple pixel units 103 include an anode layer 1031, a light-emitting layer 1032, and a cathode layer 1033. The anode layer 1031 includes multiple anode patterns 10311, and the light-emitting layer 1032 includes multiple light-emitting patterns 10321. Each first hollow region 102a exposes at least a portion of an anode pattern 10311. At least a portion of the light-emitting pattern 10321 is located within the first hollow region 102a and contacts the exposed anode pattern 10311 in the first hollow region 102a. The cathode layer 1033 covers the multiple light-emitting patterns 10321 and contacts the multiple light-emitting patterns 10321. The orthographic projection of the cathode layer 1033 on the base substrate 101 covers the orthographic projections of the multiple second hollow regions 102b on the base substrate 101.

[0108] Each pixel unit 103 includes an anode pattern 10311, a light-emitting pattern 10321 in contact with the anode pattern 10311, and a cathode layer 1033. That is, the light-emitting pattern 10321 of each pixel unit 103 emits light under the combined action of the anode pattern 10311 and the cathode layer 1033.

[0109] In the embodiments of the present application, the above embodiments can increase the amount of light incident on the ambient light sensor. However, referring to Figures 17 and 18, for ambient light with a large inclination angle, even if the light is refracted or totally reflected, it may not be able to enter the ambient light sensor below the second hollow area 102b. Therefore, further referring to Figures 19 to 22, the display panel 10 also includes: a third dimming layer 107. The third dimming layer 107 includes a plurality of second dimming patterns 1071 corresponding to the plurality of second hollow areas 102b, and at least a portion of each second dimming pattern 1071 is located in the corresponding second hollow area 102b. In addition, the orthographic projection of each second dimming pattern 1071 on the base substrate 101 covers the orthographic projection of the second hollow area 102b on the base substrate 101.

[0110] The refractive index of the second dimming pattern 1071 is greater than that of the cathode layer 1033, and the side of the second dimming pattern 1071 away from the base substrate 101 contacts the cathode layer 1033. As a result, light is refracted when it strikes the interface between the second dimming pattern 1071 and the cathode layer 1033. This allows light at a large angle to be refracted and strike the second hollowed-out area 102b, further increasing the amount of light incident on the ambient light sensor.

[0111] Optionally, referring to Figures 19 to 22, the second dimming pattern 1071 includes a fourth dimming portion 10711 located within the second hollow region 102b, and a fifth dimming portion 10712 located on a side of the fourth dimming portion 10711 away from the base substrate 101. The surface of the fifth dimming portion 10712 away from the base substrate 101 is a curved surface, or the surface of the fifth dimming portion 10712 away from the base substrate 101 is a trapezoidal surface, or the surface of the fifth dimming portion 10712 away from the base substrate 101 is a triangular surface.

[0112] Since the side of the second dimming pattern 1071 away from the base substrate 101 is the cathode layer 1033, and the thickness of the cathode layer 1033 is usually thin, in order to avoid the second dimming pattern 1071 piercing the cathode layer 1033, under normal circumstances, the surface of the fifth second dimming pattern 1071 away from the base substrate 101 can be designed as a curved surface or a trapezoidal surface.

[0113] Optionally, the height of the fifth dimming portion 10712 may be in a range of 1.5 μm to 4 μm. The fifth dimming portion 10712 in this height range may refract light better. For example, the height of the fifth dimming portion 10712 may be 2 μm or 3 μm.

[0114] Optionally, the material of the third dimming layer 107 may be a common pixel definition layer material, for example, polyimide (PI), whose refractive index may be 1.7.

[0115] In the embodiment of the present application, referring to FIG5 , the base substrate 101 further includes a peripheral region 101b surrounding the display region 101a. The display panel 10 further includes an encapsulation film layer 108 located on a side of the plurality of pixel units 103 away from the base substrate 101. The encapsulation film layer 108 includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer stacked in sequence. The first and second inorganic encapsulation layers are located in the display region 101a and the peripheral region 101b, with the organic encapsulation layer located at least in the display region 101a.

[0116] Optionally, the first inorganic encapsulation layer and the second inorganic encapsulation layer may be made of an inorganic material, and the organic encapsulation layer may be made of an organic material. For example, the first inorganic encapsulation layer and the second inorganic encapsulation layer may be made of one or more inorganic oxides such as SiNx (silicon nitride), SiOx (silicon oxide) and SiOxNy (silicon oxynitride). The organic encapsulation layer may be made of a resin material. The resin may be a thermoplastic resin or a thermoplastic resin, the thermoplastic resin may include an acrylic (PMMA) resin, and the thermosetting resin may include an epoxy resin.

[0117] Since the organic encapsulation layer can be made of an organic material, the organic encapsulation layer is not located in the peripheral area 101 b , which can prevent water vapor and oxygen from entering the display area 101 a from the organic encapsulation layer, thereby ensuring the encapsulation effect.

[0118] Optionally, the organic encapsulation layer may be manufactured by ink jet printing (IJP) and the first inorganic encapsulation layer and the second inorganic encapsulation layer may be manufactured by chemical vapor deposition (CVD).

[0119] Optionally, the portion of the second inorganic encapsulation layer located in the display area 101a, away from the surface of the base substrate 101, is flat, and the color filter layer 104 can be located on the flat surface. Specifically, providing the encapsulation film layer 108 on the side of the color filter layer 104 close to the base substrate 101 not only encapsulates the pixel units 103 but also provides a flat surface for fabricating the color filter layer 104, thereby ensuring fabrication accuracy of the color filter layer 104.

[0120] FIG23 is a schematic diagram of the structure of another display panel provided by an embodiment of the present application. The display panel includes: a buffer layer (buffer) n1, an active layer n2, a first gate insulator (GI) n3, a first gate layer n4, a second gate insulator n5, a second gate layer n6, an inter-level dielectric (ILD) n7, a first source and drain layer n8, a first planarization layer (PLN) n9, a second source and drain layer n10, a second planarization layer n11, an anode layer 1031 (anode), a pixel defining layer 102, a support layer (PS) n12, a light-emitting layer 1032, a cathode layer 1033 (cathode), and an encapsulation film layer 108, stacked sequentially in a direction away from a substrate 101.

[0121] Each pixel unit 103 in the display area 101a of the display panel may include a pixel circuit and a light emitting unit, wherein the pixel circuit may include a storage capacitor and at least one thin film transistor.

[0122] Optionally, the active layer n2 may include multiple active patterns. The first gate layer n4 may include multiple first gate patterns. The second gate layer n6 may include multiple second gate patterns. The first source-drain layer n8 may include multiple source electrodes and multiple drain electrodes corresponding to the multiple source electrodes. The second source-drain layer n10 may include multiple connection patterns.

[0123] An active pattern, a first gate pattern, a source electrode, and a drain electrode can constitute a thin film transistor, and the source electrode and the corresponding drain electrode of each thin film transistor can be connected to the active pattern. A first gate pattern and a second gate pattern can constitute a storage capacitor.

[0124] Referring to Figure 23 , the display panel includes an anode layer 1031, a light-emitting layer 1032, and a cathode layer 1033, which can constitute the light-emitting units of multiple pixel units 103. The anode layer 1031 can include multiple anode patterns 10311. The light-emitting layer 1032 can include multiple light-emitting patterns 10321 corresponding to the multiple anode patterns 10311. The cathode layer 1033 is a common film layer for the multiple light-emitting units. Each light-emitting unit includes an anode pattern 10311, a light-emitting pattern 10321, and a cathode layer 1033.

[0125] The first hollow region 102a of the pixel defining layer 102 included in the display panel can be used to expose the anode pattern 10311 of a light emitting unit, and the light emitting pattern 10321 of each light emitting unit contacts the exposed anode pattern 10311. The anode pattern 10311 of each light emitting unit is connected to the drain of the thin film transistor through a connection pattern.

[0126] In the embodiments of the present application, dimming patterns on curved, triangular, or trapezoidal surfaces in the aforementioned embodiments can be produced by setting the line width and space period of the mask, combined with modulation of the exposure process. The line width "line" represents the width of the portion of the mask used to form the dimming pattern, and the space period represents the distance between adjacent dimming patterns on the mask.

[0127] Alternatively, as shown in FIG24 , a triangular surface may have a line width of 1.2 and a period of 1.2. As shown in FIG25 , a curved surface may have a line width of 1.6 and a period of 1.2.

[0128] In summary, an embodiment of the present application provides a display panel, which includes a base substrate, a pixel defining layer, a plurality of pixel units, a color filter layer, a first dimming layer, and a second dimming layer. The first dimming layer and the second dimming layer have different refractive indices. The target surface of the target portion of the first dimming layer is at least a portion of the surface of the interface between the second dimming layer and the target portion, and the target surface is used to refract or totally reflect light from the side of the second dimming layer away from the base substrate. Therefore, there is no need to design the second hollow area and the third hollow area to be larger, so that ambient light at a large angle can be refracted or totally reflected by the target surface, thereby ensuring the amount of light incident on the ambient light sensor and ensuring the normal use of the ambient light sensor.

[0129] FIG26 is a flow chart of a method for manufacturing a display panel according to an embodiment of the present application. Referring to FIG26 , the method includes:

[0130] Step S101: Obtain a base substrate.

[0131] In the embodiment of the present application, when preparing the display panel, a base substrate 101 may be obtained first. The base substrate 101 may be a flexible substrate or a glass substrate.

[0132] Step S102: forming a buffer layer, an active layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer dielectric layer, a first source and drain layer, a first planarizing layer, a second source and drain layer, and a second planarizing layer on one side of the substrate.

[0133] In the embodiments of the present application, the active layer, the first gate layer, the second gate layer, the first source-drain electrode layer, and the second source-drain electrode layer can all be prepared using a patterning process. For example, the method for preparing the active layer may include forming an active thin film and patterning the active thin film to obtain the active layer. The patterning process includes photoresist coating, exposure, development, etching, and photoresist removal.

[0134] Step S103 : forming an anode layer, a pixel defining layer, a light emitting layer, a third dimming layer and a cathode layer on a side of the second planar layer away from the base substrate.

[0135] In the embodiment of the present application, the anode layer 1031 may include a plurality of anode patterns 10311. The pixel defining layer 102 has a plurality of first hollow regions 102a and a plurality of second hollow regions 102b. The plurality of first hollow regions 102a correspond to the plurality of anode patterns 10311, and each first hollow region 102a exposes a corresponding anode pattern 10311. The light-emitting layer 1032 includes a plurality of light-emitting patterns 10321 corresponding to the plurality of anode patterns 10311. Each light-emitting pattern 10321 is located within a first hollow region 102a and contacts the anode pattern 10311 exposed in the first hollow region 102a.

[0136] The third dimming layer 107 includes a plurality of second dimming patterns 1071 corresponding to the plurality of second hollowed-out regions 102 b. At least a portion of each second dimming pattern 1071 is located within the corresponding second hollowed-out region 102 b. Furthermore, the orthographic projection of each second dimming pattern 1071 on the base substrate 101 overlaps the orthographic projection of the second hollowed-out region 102 b on the base substrate 101.

[0137] The cathode layer 1033 is located on a side of the third dimming layer 107 away from the base substrate 101, and the refractive index of the cathode layer 1033 is lower than the refractive index of the second dimming pattern 1071 in the third dimming layer 107. As a result, light is refracted when it strikes the interface between the second dimming pattern 1071 and the cathode layer 1033. This allows light at a large angle to be refracted and strike the second hollow area 102b, thereby increasing the amount of light incident on the ambient light sensor.

[0138] Step S104 : forming a packaging film layer on a side of the cathode layer away from the base substrate.

[0139] In an embodiment of the present application, the encapsulation film layer 108 includes a first inorganic encapsulation layer, an organic encapsulation layer and a second inorganic encapsulation layer. Optionally, the first inorganic encapsulation layer and the second inorganic encapsulation layer can be made of an inorganic material, and the organic encapsulation layer can be made of an organic material. For example, the first inorganic encapsulation layer and the second inorganic encapsulation layer can be made of one or more inorganic oxides such as SiNx, SiOx and SiOxNy. The organic encapsulation layer can be made of a resin material. The resin can be a thermoplastic resin or a thermoplastic resin, the thermoplastic resin can include an acrylic (PMMA) resin, and the thermosetting resin can include an epoxy resin.

[0140] The first inorganic encapsulation layer and the second inorganic encapsulation layer can be manufactured by chemical vapor deposition, and the organic encapsulation layer can be manufactured by inkjet printing.

[0141] Step S105 : forming a color filter layer on a side of the packaging film layer away from the base substrate.

[0142] In the embodiment of the present application, the color filter layer 104 includes a plurality of color resist blocks 1041 corresponding to the plurality of pixel units 103, and a black matrix 1042 located between the plurality of color resist blocks 1041. The orthographic projections of the color resist blocks 1041 on the base substrate 101 overlap the orthographic projections of the light-emitting regions of the corresponding pixel units 103 on the base substrate 101, and light emitted by each pixel unit 103 is emitted from the corresponding color resist block 1041.

[0143] The black matrix 1042 includes multiple third hollow areas 1042a corresponding to the multiple second hollow areas 102b. The orthographic projections of the third hollow areas 1042a on the base substrate 101 overlap with the orthographic projections of the corresponding second hollow areas 102b on the base substrate 101. The second hollow areas 102b and the third hollow areas 1042a can form a sensor aperture. External ambient light can enter the ambient light sensor under the display through the third hollow areas 1042a and the second hollow areas 102b, ensuring normal operation of the ambient light sensor.

[0144] Step S106 , forming a first dimming layer and a second dimming layer on a side of the color filter layer away from the base substrate.

[0145] In the embodiment of the present application, the refractive index of the first dimming layer 105 is different from the refractive index of the second dimming layer 106. The orthographic projection of the target portion of the first dimming layer 105 on the base substrate 101 is located within the orthographic projection of the third hollow area 1042a on the base substrate 101, and the second dimming layer 106 covers the target portion of the first dimming layer 105.

[0146] The target surface M of the target portion away from the black matrix 1042 intersects and is not perpendicular to the surface of the black matrix 1042 away from the base substrate 101. The target surface M is at least a portion of the interface between the second dimming layer 106 and the target portion. The target surface M is used to refract or totally reflect light from the side of the second dimming layer 106 away from the base substrate 101.

[0147] In summary, an embodiment of the present application provides a method for preparing a display panel, and the display panel prepared by the method includes a base substrate, a pixel defining layer, a plurality of pixel units, a color filter layer, a first dimming layer and a second dimming layer. The refractive index of the first dimming layer and the second dimming layer is different. The target surface of the target part of the first dimming layer is at least a part of the surface of the interface between the second dimming layer and the target part, and the target surface is used to refract or totally reflect the light from the side of the second dimming layer away from the base substrate. Therefore, there is no need to design the second hollow area and the third hollow area to be larger, so that the ambient light at a large angle can be refracted or totally reflected by the target surface, which can ensure the amount of light incident on the ambient light sensor and ensure the normal use of the ambient light sensor.

[0148] FIG27 is a schematic diagram of the structure of a display device provided in an embodiment of the present application. Referring to FIG27 , the display device includes: a plurality of ambient light sensors 20 and a display panel 10 provided in the above embodiment.

[0149] The orthographic projection of the ambient light sensor 20 on the base substrate 101 of the display panel 10 is located within the orthographic projection of the second hollow region 102b on the base substrate 101, and is also located within the orthographic projection of the third hollow region 1042a on the base substrate 101, such as the display area 101a. The ambient light sensor 20 is configured to receive or reflect light from the side of the color filter layer 104 in the display panel 10 away from the base substrate 101 through the third hollow region 1042a.

[0150] Alternatively, the ambient light sensor 20 may be any sensor that receives ambient light. The ambient light sensor 20 may include: a sensor that detects changes in ambient light brightness to enable the display device to automatically adjust the display brightness; an optical fingerprint sensor for under-screen fingerprint unlocking; or a sensor for facial recognition unlocking.

[0151] Since the display device can have substantially the same technical effects as the display panel described in the previous embodiment, the technical effects of the display device will not be repeatedly described here for the purpose of brevity.

[0152] The terms used in the embodiments of this application are only used to explain the embodiments of this application and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in the embodiments of this application should have the common meaning understood by people with ordinary skills in the field to which this application belongs.

[0153] The terms used in the embodiments of this application are intended solely to illustrate the embodiments of this application and are not intended to limit this application. Unless otherwise defined, technical or scientific terms used in the embodiments of this application should have the same ordinary meaning as those understood by persons of ordinary skill in the art to which this application belongs. The terms "first," "second," "third," and similar terms used in this patent specification and claims do not denote any order, quantity, or importance, but are simply used to distinguish between different components. Similarly, terms such as "a" or "an" do not denote a limitation of quantity, but rather denote the presence of at least one. Terms such as "include" or "comprising" and similar terms mean that the elements or objects listed before "include" or "comprising" include the elements or objects listed after "include" or "comprising," and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "connected" are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used solely to indicate relative positions. When the absolute position of the described objects changes, the relative positions may also change accordingly.

[0154] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A display panel, characterized in that, The display panel includes: a substrate substrate having a display area; a pixel defining layer located on one side of the substrate substrate, and the pixel defining layer having a plurality of first hollow areas and a plurality of second hollow areas; a plurality of pixel units corresponding to the plurality of first hollow areas, the plurality of pixel units being located in the display area, and a light emitting area of each pixel unit being located within the corresponding first hollow area; a color filter layer located on a side of the plurality of pixel units away from the substrate substrate, the color filter layer including a plurality of color resistance blocks corresponding to the plurality of pixel units and a black matrix located between the plurality of color resistance blocks, a positive projection of the color resistance block on the substrate substrate covering a positive projection of the light emitting area of the pixel unit on the substrate substrate, light emitted by the pixel unit exiting from the corresponding color resistance block, the black matrix including a plurality of third hollow areas corresponding to the plurality of second hollow areas, and a positive projection of the third hollow area on the substrate substrate overlapping a positive projection of the corresponding second hollow area on the substrate substrate; a first dimming layer and a second dimming layer located on a side of the color filter layer away from the substrate substrate, a refractive index of the first dimming layer being different from a refractive index of the second dimming layer, a positive projection of a target portion of the first dimming layer on the substrate substrate being located within a positive projection of the third hollow area on the substrate substrate, the second dimming layer covering the target portion of the first dimming layer, a target surface in a surface of the target portion away from the black matrix intersecting and not being perpendicular to a surface of the black matrix away from the substrate substrate, the target surface being at least a partial surface of an interface between the second dimming layer and the target portion for refracting or totally reflecting light from a side of the second dimming layer away from the substrate substrate.

2. The display panel according to claim 1, wherein The refractive index of the first dimming layer is greater than the refractive index of the second dimming layer; the first dimming layer includes a dimming pattern, and a positive projection of the dimming pattern on the substrate substrate covers a positive projection of the third hollow area on the substrate substrate; The target surface is for refracting light from a side of the second dimming layer away from the substrate substrate.

3. The display panel according to claim 2, wherein The dimming pattern includes: a first dimming portion located within the third hollow area and a second dimming portion located on a side of the first dimming portion away from the substrate substrate; A surface of the second dimming portion away from the substrate substrate is an arcuate surface; alternatively, a surface of the second dimming portion away from the substrate substrate is a trapezoidal surface; or alternatively, a surface of the second dimming portion away from the substrate substrate is a triangular surface.

4. The display panel according to claim 3, wherein, A height range of the second dimming portion is from 2 micrometers to 4 micrometers.

5. The display panel according to claim 2, characterized in that, The refractive index range of the first dimming layer is from 1.6 to 1.8, and the refractive index range of the second dimming layer is from 1.3 to 1.5; A difference range between the refractive index of the first dimming layer and the refractive index of the second dimming layer is from 0.1 to 0.

3.

6. The display panel according to claim 1, wherein The refractive index of the first light-dimming layer is less than that of the second light-dimming layer; the first light-dimming layer has an opening, and the orthographic projection of the opening on the substrate is located within the orthographic projection of the third hollowed-out area on the substrate; The surface of the opening is the target surface, and the target surface is used for total reflection of light from the side of the second light-dimming layer away from the substrate.

7. The display panel according to claim 6, wherein The first light-dimming layer includes a third light-dimming part covering the side wall of the third hollowed-out area, and the surface of the side wall of the third light-dimming part away from the third hollowed-out area is the target surface; The range of the angle between the target surface and the surface of the black matrix away from the substrate is from 45 degrees to 85 degrees.

8. The display panel according to claim 7, wherein The third light-dimming part is also located on the side of the black matrix away from the substrate, and the thickness range of the part of the third light-dimming part located on the side of the black matrix away from the substrate is from 1 micron to 3 microns.

9. The display panel according to claim 6, wherein The refractive index range of the first light-dimming layer is from 1.3 to 1.5, and the refractive index range of the second light-dimming layer is from 1.6 to 1.8; The difference range between the refractive index of the second light-dimming layer and the refractive index of the first light-dimming layer is from 0.1 to 0.

3.

10. The display panel according to any one of claims 1 to 9, characterized in that, The plurality of pixel units include an anode layer, a light-emitting layer, and a cathode layer. The anode layer includes a plurality of anode patterns, the light-emitting layer includes a plurality of light-emitting patterns, at least part of each anode pattern is exposed in each first hollowed-out area, at least part of the light-emitting pattern is located in the first hollowed-out area and is in contact with the anode pattern exposed in the first hollowed-out area, the cathode layer covers the plurality of light-emitting patterns and is in contact with the plurality of light-emitting patterns, and the orthographic projection of the cathode layer on the substrate covers the orthographic projection of the plurality of second hollowed-out areas on the substrate; The display panel further includes: a third light-dimming layer, the third light-dimming layer includes a plurality of light-dimming structures corresponding to the plurality of second hollowed-out areas, at least part of each light-dimming structure is located in the corresponding second hollowed-out area, and the orthographic projection of each light-dimming structure on the substrate covers the orthographic projection of the second hollowed-out area on the substrate; Wherein, the refractive index of the light-dimming structure is greater than that of the cathode layer.

11. The display panel according to claim 10, wherein The light-dimming structure includes a fourth light-dimming part located in the second hollowed-out area and a fifth light-dimming part located on the side of the fourth light-dimming part away from the substrate; The surface of the fifth light-dimming part away from the substrate is a curved surface; or, the surface of the fifth light-dimming part away from the substrate is a trapezoidal surface.

12. The display panel according to claim 11, wherein The height range of the fifth light-dimming part is from 1.5 microns to 4 microns.

13. The display panel according to any one of claims 1 to 9, characterized in that, The orthographic projection of each of the plurality of second hollowed-out areas on the substrate is located between the orthographic projections of two adjacent first hollowed-out areas on the substrate.

14. The display panel according to any one of claims 1 to 9, characterized in that, The substrate further has a peripheral area surrounding the display area; the display panel further includes: a packaging film layer located on the side of the plurality of pixel units away from the substrate; The encapsulation film layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer that are stacked in sequence. The first inorganic encapsulation layer and the second inorganic encapsulation layer are located in the display area and the peripheral area, and the organic encapsulation layer is located in the display area; Wherein, the surface of the part of the second inorganic encapsulation layer located in the display area away from the substrate is a plane, and the color filter layer is located on the plane.

15. The display panel according to any one of claims 1 to 9, characterized in that, The display panel further includes a buffer layer, an active layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer dielectric layer, a first source-drain layer, a first planarization layer, a second source-drain layer, a second planarization layer, an anode layer, the pixel defining layer, a support layer, a light-emitting layer, a cathode layer, and an encapsulation film layer that are stacked in sequence along the direction away from the substrate; Wherein, each pixel unit includes a pixel circuit and a light-emitting unit, and each pixel circuit is configured to provide a driving signal for the corresponding light-emitting unit. The active layer, the first gate layer, the second gate layer, the first source-drain layer, and the second source-drain layer are used to form a plurality of pixel circuits included in the plurality of pixel units.

16. A method for manufacturing a display panel, characterized in that, The method includes: Obtaining a substrate; Forming a plurality of pixel units and a pixel defining layer on one side of the substrate. The pixel defining layer has a plurality of first hollow areas and a plurality of second hollow areas. The plurality of pixel units correspond to the plurality of first hollow areas and are located in the display area. The light-emitting area of each pixel unit is located within the corresponding first hollow area; Forming a color filter layer on the side of the plurality of pixel units away from the substrate. The color filter layer includes a plurality of color-resist blocks corresponding to the plurality of pixel units, and a black matrix located between the plurality of color-resist blocks. The orthographic projection of the color-resist block on the substrate covers the orthographic projection of the light-emitting area of the pixel unit on the substrate. The light emitted by the pixel unit exits from the corresponding color-resist block. The black matrix includes a plurality of third hollow areas corresponding to the plurality of second hollow areas. The orthographic projection of the third hollow area on the substrate overlaps with the orthographic projection of the corresponding second hollow area on the substrate; Forming a first light-adjusting layer on the side of the color filter layer away from the substrate. The orthographic projection of the target part of the first light-adjusting layer on the substrate is located within the orthographic projection of the third hollow area on the substrate. The target surface of the target part away from the black matrix intersects with the surface of the black matrix away from the substrate and is not perpendicular; Forming a second light-adjusting layer on the side of the first light-adjusting layer away from the substrate. The second light-adjusting layer covers the target part. The refractive index of the second light-adjusting layer is different from that of the first light-adjusting layer. The target surface is at least part of the interface surface between the second light-adjusting layer and the target part, and is configured to refract or totally reflect the light from the side of the second light-adjusting layer away from the substrate. Forming a second light-adjusting layer on the side of the first light-adjusting layer away from the substrate. The second light-adjusting layer covers the target part. The refractive index of the second light-adjusting layer is different from that of the first light-adjusting layer. The target surface is at least part of the interface surface between the second light-adjusting layer and the target part, and is configured to refract or totally reflect the light from the side of the second light-adjusting layer away from the substrate.

17. The method according to claim 16, wherein After forming the pixel defining layer and before forming the cathode layer of the light-emitting units of the plurality of pixel units, the method further includes: forming a third light-dimming layer, the third light-dimming layer including a plurality of light-dimming structures corresponding to the plurality of second hollow areas, at least a part of each light-dimming structure being located in the corresponding second hollow area, and the orthographic projection of each light-dimming structure on the substrate covering the orthographic projection of the second hollow area on the substrate; wherein the refractive index of the light-dimming structure is greater than the refractive index of the cathode layer.

18. A display device, characterized in that, The display device includes: a plurality of ambient light sensors and a display panel according to any one of claims 1 to 15; the orthographic projection of the ambient light sensor on the substrate of the display panel is located within the orthographic projection of the second hollow area of the pixel defining layer in the display panel on the substrate, and within the orthographic projection of the third hollow area of the black matrix in the display panel on the substrate; wherein the ambient light sensor is configured to receive or reflect light from the side of the second light-dimming layer away from the substrate through the second hollow area and the third hollow area.

Images