Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel comprises an array substrate, a black pixel definition layer and a shading layer, the black pixel definition layer is arranged on one side of the array substrate, the shading layer is arranged on the side, away from the array substrate, of the black pixel definition layer, the black pixel definition layer is provided with a first opening, and the first opening is communicated with the shading layer; the black pixel definition layer is provided with a first opening, the shading layer is provided with a second opening, the second opening and the first opening are oppositely arranged, the diameter or the circumcircle diameter of the first opening is smaller than the diameter or the circumcircle diameter of the second opening, the first opening is formed in the black pixel definition layer with high process precision, and the size of the second opening in the shading layer is larger than that of the first opening. Therefore, the light transmittance at the first opening can be increased while high resolution is realized, so that the sensitivity and the accuracy of the photosensitive device can be improved.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) display technology is widely used in various fields due to its light weight, wide viewing angle, fast response, low temperature resistance, high luminous efficiency, and the ability to produce curved flexible display panels.

[0003] At present, in order to increase the screen-to-body ratio of the display panel, light-transmitting holes are usually set in the part of the black matrix in the display panel corresponding to the display area, and the photosensitive device can obtain light from the external environment through the light-transmitting holes on the black matrix. However, as the resolution of the display panel becomes higher and higher, the size of the light-transmitting holes in the display area becomes smaller and smaller, and the light transmittance of the light-transmitting holes will also decrease accordingly. Limited by the process accuracy of the black matrix, when the size of the light-transmitting holes is too small, a normal opening cannot be formed on the black matrix, which further reduces the resolution of the light-transmitting holes, resulting in reduced sensitivity and accuracy of the photosensitive device.

[0004] Therefore, it is necessary to provide a display panel and a display device to improve this defect. Summary of the invention

[0005] Embodiments of the present application provide a display panel and a display device, which can improve the light transmittance of light-transmitting holes in a high-resolution display panel.

[0006] An embodiment of the present application provides a display panel, the display panel comprising a display area, and the display panel further comprising: An array substrate; A black pixel definition layer, disposed on one side of the array substrate, wherein the black pixel definition layer has a first opening; A light shielding layer is disposed on a side of the black pixel definition layer away from the array substrate, the light shielding layer has a second opening, and the second opening is disposed in alignment with the first opening; The diameter or the circumscribed circle diameter of the first opening is smaller than the diameter or the circumscribed circle diameter of the second opening.

[0007] Optionally, the diameter of the first opening or the diameter of the circumscribed circle is greater than or equal to 5 micrometers, and the diameter of the second opening or the diameter of the circumscribed circle is greater than 10 micrometers.

[0008] Optionally, the orthographic projection of the first opening on the array substrate is located within the orthographic projection of the second opening on the array substrate.

[0009] Optionally, along the radial direction of the first opening, a minimum distance between an edge of the first opening and an edge of the second opening is greater than or equal to 2 micrometers.

[0010] Optionally, the transmittance of the black pixel definition layer is greater than the transmittance of the light shielding layer.

[0011] Optionally, the black pixel definition layer has a light transmittance greater than 80% in the wavelength range of 750 nm to 980 nm.

[0012] Optionally, the display panel further includes a light-emitting layer, the black pixel definition layer further includes a plurality of third openings, the light-emitting layer is disposed in the third openings, and the first openings are spaced apart from the third openings.

[0013] Optionally, the display panel also includes a color filter layer, the color filter layer includes a plurality of filter units, the shading layer has a plurality of fourth openings, the second openings are spaced apart from the fourth openings, the fourth openings are aligned with the third openings, and the filter unit is disposed in the fourth openings.

[0014] Optionally, the black pixel definition layer has a plurality of the first openings, and each of the first openings is disposed between a plurality of adjacent first openings.

[0015] Optionally, the display panel includes a plurality of conductive layers, each of the conductive layers includes a plurality of conductive patterns, and an orthographic projection of the first opening on the array substrate is disposed separately from an orthographic projection of the conductive pattern on the array substrate.

[0016] An embodiment of the present application further provides a display device, comprising a photosensitive device and a display panel as described above, wherein the photosensitive device is disposed on one side of the display panel, and the photosensitive device is aligned with the first opening.

[0017] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a display panel and a display device, the display panel including an array substrate, a black pixel definition layer and a light shielding layer, the black pixel definition layer is arranged on one side of the array substrate, the light shielding layer is arranged on the side of the black pixel definition layer away from the array substrate, the black pixel definition layer has a first opening, the light shielding layer has a second opening, the diameter of the first opening or the diameter of the circumscribed circle is smaller than the diameter of the second opening or the diameter of the circumscribed circle, by forming the first opening on the black pixel definition layer with higher process precision and making the size of the second opening on the light shielding layer larger than the size of the first opening, so that high resolution can be achieved while avoiding the light shielding layer blocking the light passing through the first opening, thereby increasing the light transmittance at the first opening, thereby improving the sensitivity and accuracy of the photosensitive device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A top view of a display panel provided in an embodiment of the present application; Figure 2 A schematic diagram of a first opening and a third opening in a display panel provided in an embodiment of the present application; Figure 3 The display panel provided in the embodiment of the present application is Figure 2 A cross-sectional view along the A-A' direction is shown; Figure 4 A top view of a first opening and a second opening provided for an embodiment of the present application; Figure 5 The display panel provided in the embodiment of the present application is Figure 4 The cross-sectional view along the B-B' direction is shown; Figure 6 A transmittance curve diagram of a black pixel definition layer in a display panel provided by an embodiment of the present application; Figure 7 A light transmittance curve diagram of a light shielding layer in a display panel provided in an embodiment of the present application; Figure 8 A schematic diagram of the structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] The following descriptions of the embodiments are made with reference to the attached drawings to illustrate specific embodiments that the present application may be implemented in. The directional terms mentioned in the present application, such as [up], [down], [front], [back], [left], [right], [inside], [outside], [side], etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present application, rather than to limit the present application. In the drawings, units with similar structures are represented by the same reference numerals.

[0020] The present application is further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] An embodiment of the present application provides a display panel, which includes a display area. The display panel also includes a substrate, a black pixel definition layer and a shading layer. The black pixel definition layer is arranged on one side of the substrate, and the shading layer is arranged on the side of the black pixel definition layer away from the array substrate. The black pixel definition layer has a first opening, and the shading layer has a second opening. The second opening is arranged in alignment with the first opening, and the diameter or circumscribed circle diameter of the first opening is smaller than the diameter or circumscribed circle diameter of the second opening.

[0022] In an embodiment of the present application, a first opening is formed on a black pixel definition layer with higher process precision, and the diameter or circumscribed circle diameter of the first opening is made smaller than the diameter or circumscribed circle diameter of the second opening on the light-shielding layer. In this way, high resolution can be achieved while avoiding the light-shielding layer blocking the light passing through the first opening, thereby increasing the transmittance at the first opening, thereby improving the sensitivity and accuracy of the photosensitive device.

[0023] See also Figure 1 , Figure 1 The top view of the display panel provided in the embodiment of the present application, the display panel 100 includes a display area AA and a non-display area NA, and the display area AA is an area where the user can directly observe the image or information. The display area AA is composed of a large number of sub-pixels arranged and combined, and presents colorful visual content by controlling these sub-pixels to emit light or change brightness. The non-display area NA is located at the edge or around the display panel and is not directly involved in the display process of the image or information. The non-display area NA is provided with necessary electronic components and assemblies such as circuits, driver chips, connecting lines, sensors, etc. These parts are responsible for converting signals from inside the device into instructions that can be understood by the display area, controlling the switching and brightness adjustment of sub-pixels, and realizing functions such as image display.

[0024] See also Figure 2 and Figure 3 , Figure 2 A schematic diagram of a first opening and a third opening in a display panel provided in an embodiment of the present application, Figure 3 The display panel provided in the embodiment of the present application is Figure 2 In the cross-sectional view along the AA' direction shown, the display panel 100 includes an array substrate 1, a black pixel definition layer 2 and a light-emitting layer 3. The black pixel definition layer 2 is disposed on one side of the array substrate 1. The black pixel definition layer 2 has a plurality of third openings 21. The third openings 21 are disposed in the display area AA. The third openings 21 are also pixel openings. The light-emitting layer 3 is disposed in the third openings 21. The black pixel definition layer 2 also includes at least one first opening 22. The first opening 22 is spaced apart from the third opening 21. The first opening 22 is configured to allow the ambient light required by the photosensitive device to pass through.

[0025] Compared with the black matrix, the black pixel definition layer 2 has higher process precision. By utilizing the process of etching the third opening 21 on the black pixel definition layer 2 and simultaneously forming the first opening 22, a first opening 22 with a complete structure and smaller size can be formed on the black pixel definition layer 2 without increasing the display panel process. In this way, while ensuring that the display panel 100 has a high resolution, the transmittance of the first opening 22 that allows the ambient light required by the photosensitive device to pass through can be improved.

[0026] In some embodiments, see Figure 2The third opening 21 includes a plurality of first sub-openings 211, a second sub-opening 212 and a third sub-opening 213, and the plurality of first sub-openings 211, the second sub-openings 212 and the third sub-openings 213 are arranged in an array in a pixel arrangement manner. The light-emitting layer 3 includes a first light-emitting unit 31, a second light-emitting unit 32 and a third light-emitting unit 33, the first light-emitting unit 31 emits red light, the first light-emitting unit 31 is arranged in the first sub-opening 211, the second light-emitting unit 32 emits green light, the second light-emitting unit 32 is arranged in the second sub-opening 212, the third light-emitting unit 33 emits blue light, and the third light-emitting unit 33 is arranged in the third sub-opening 213. The black pixel definition layer 2 has a first opening 22, and the first opening 22 is arranged between the adjacent first sub-opening 211, the second sub-opening 212 and the third sub-opening 213.

[0027] In some embodiments, the black pixel definition layer 2 has a plurality of first openings 22 . The first openings 22 are disposed in the display area AA. Each of the first openings 22 is disposed between a plurality of adjacent third openings 21 .

[0028] In some embodiments, see Figure 1 The array substrate 1 includes a substrate 11 and a driving circuit layer 12, and the driving circuit layer 12 is arranged on the surface of the substrate 11. The driving circuit layer 12 includes a stacked semiconductor layer, a plurality of conductive layers 121, and a plurality of insulating layers 122 for insulating and isolating an active layer from a conductive layer or an adjacent conductive layer. The conductive layer 121 may be a gate layer or a source-drain electrode layer, and the insulating layer 122 may be an inorganic insulating layer or an organic insulating layer, for example, a gate insulating layer, an interlayer dielectric layer, a passivation layer, and a planar layer.

[0029] In some embodiments, see Figure 1 The display panel 100 further includes an anode 4 and a cathode 5. The anode 4 is disposed on the surface of the insulating layer 122 away from the substrate 11. The black pixel definition layer 2 is disposed on the surface of the anode 4 and the insulating layer 122 away from the substrate 11. The black pixel definition layer 2 has a plurality of third openings 21. The third openings 21 penetrate the black pixel definition layer 2 in the thickness direction of the display panel. The third openings 21 expose a portion of the anode 4. The light-emitting layer 3 is disposed in the third openings 21 and is located on the anode 4 exposed by the third openings 21. The cathode 5 is disposed entirely on the side of the black pixel definition layer 2 away from the array substrate 1. The cathode 5 also covers the light-emitting layer 3. The third openings 21 may also be referred to as pixel openings. The area defined by each third opening 21 may be regarded as a sub-pixel.

[0030] In some embodiments, see Figure 1The display panel 100 further includes a light shielding layer 6, which is disposed on the side of the black pixel definition layer 2 away from the array substrate 1. The light shielding layer 6 has at least one second opening 61, and the second opening 61 is arranged in alignment with the first opening 22. By arranging the light shielding layer 6 on the side of the black pixel definition layer 2 away from the array substrate 1, the light shielding layer 6 is used to shield the conductive layer in the display panel 100 to prevent the metal conductive pattern in the conductive layer from reflecting light and affecting the display effect of the display panel. By forming the second opening 61 on the light shielding layer 6 and aligning the second opening 61 with the first opening 22, it is possible to avoid the light shielding layer 6 from shielding the first opening 22, and the ambient light can be irradiated to the photosensitive device through the second opening 61 and the first opening 22.

[0031] In some embodiments, see Figure 2 , Figure 2 A schematic diagram of the second opening and the third opening in the display panel provided in an embodiment of the present application, wherein the diameter or circumscribed circle diameter of the second opening 61 is greater than the diameter or circumscribed circle diameter of the first opening 22, thereby preventing the shading layer 6 from blocking the first opening 22, thereby increasing the light transmittance at the first opening 22.

[0032] In some embodiments, see Figure 4 and Figure 5 , Figure 4 A top view of a first opening and a second opening provided in an embodiment of the present application, Figure 5 The display panel provided in the embodiment of the present application is Figure 4 In the cross-sectional view along the BB' direction shown, the first opening 22 and the second opening 61 are both circular in shape, and the diameter D1 of the second opening 61 is larger than the diameter D2 of the first opening 22. By making the diameter of the second opening 61 on the light shielding layer 6 larger than the diameter of the first opening 22, the light shielding layer 6 can be prevented from blocking the first opening 22, thereby increasing the light transmittance at the first opening 22.

[0033] In some embodiments, the shapes of the first opening 22 and the second opening 61 may be, in addition to the circular shapes in the above embodiments, ellipses, rectangles, rounded rectangles, and other polygons. In this case, the diameter of the circumscribed circle of the second opening 61 is larger than the diameter of the circumscribed circle of the first opening 22. This can also prevent the shading layer 6 from blocking the first opening 22.

[0034] In some embodiments, the diameter of the first opening 22 or the diameter of the circumscribed circle is greater than or equal to 5 microns, and the diameter of the second opening 61 or the diameter of the circumscribed circle is greater than 10 microns. For example, the diameter of the first opening 22 or the diameter of the circumscribed circle is 5 microns, 6 microns, 7 microns, 8 microns, 9 microns or 10 microns, and the diameter of the second opening 61 or the diameter of the circumscribed circle is 11 microns, 12 microns or 13 microns. Limited by the process accuracy of the light shielding layer 6, when the diameter of the second opening 61 is less than or equal to 10 microns, a normal opening cannot be formed on the light shielding layer 6. Therefore, limiting the diameter of the second opening 61 or the diameter of the circumscribed circle to more than 10 microns can ensure that a normal opening can be formed on the light shielding layer 6.

[0035] In some embodiments, the diameter of the first opening 22 or the diameter of the circumscribed circle is greater than or equal to 5 microns and less than or equal to 10 microns. The process accuracy of the black pixel definition layer 2 is higher than the process accuracy of the light shielding layer 6. When the diameter of the first opening 22 or the diameter of the circumscribed circle is greater than or equal to 5 microns, the first opening 22 can be normally formed on the black pixel definition layer 2. Therefore, in the case of high resolution, a first opening 22 with a smaller size can also be formed.

[0036] In some embodiments, see Figure 4 and Figure 5 The orthographic projection of the first opening 22 on the array substrate 1 is located within the orthographic projection of the second opening 61 on the array substrate 1, so that the light shielding layer 6 can avoid blocking the first opening 22, and the ambient light can be irradiated to the photosensitive device through the second opening 61 and the first opening 22.

[0037] In some embodiments, along the radial direction of the first opening 22, the minimum distance D3 between the edge of the first opening 22 and the edge of the second opening 61 is greater than or equal to 2 micrometers. For example, the minimum distance between the edge of the first opening 22 and the edge of the second opening 61 is 2 micrometers, 2.5 micrometers, 3 micrometers, 3.5 micrometers, or 4 micrometers.

[0038] It should be noted that there is a deviation between the pixel definition layer 2 and the light shielding layer 6 during the manufacturing process. Although the first opening 22 and the second opening 61 are coaxial during the design, there is a certain deviation between the axis of the second opening 61 and the axis of the first opening 22 during the actual manufacturing process. If the distance between the edge of the first opening 22 and the edge of the second opening 61 is too small, when the deviation is large, the light shielding layer 6 will block part of the first opening 22, resulting in a decrease in the light transmittance of the first opening 22. By limiting the minimum distance between the edge of the first opening 22 and the edge of the second opening 61 to 2 microns or more, it is possible to avoid the situation where the light shielding layer 6 partially covers the first opening 22 due to the deviation.

[0039] In some embodiments, the light transmittance of the material of the black pixel definition layer 2 is greater than the light transmittance of the material of the light shielding layer 6 .

[0040] See also Figure 2 Since the orthographic projection of the first opening 22 on the array substrate 1 is located within the orthographic projection of the second opening 61 on the array substrate 1, the transmittance of the black pixel definition layer 2 is greater than the transmittance of the light shielding layer 6, and the light passing through the second opening 61 can be respectively irradiated to the photosensitive device through the first opening 22 or the area exposed through the black pixel definition layer 2, thereby further increasing the amount of light entering the photosensitive device, thereby further improving the sensitivity and accuracy of the photosensitive device.

[0041] In some embodiments, the material of the black pixel definition layer 2 is a black organic photoresist material, such as acrylic or siloxane, and the material of the light-shielding layer 6 is a black organic photoresist material, such as acrylic or siloxane. The material of the black pixel definition layer 2 is different from the material of the light-shielding layer 6, thereby ensuring that the transmittance of the black pixel definition layer 2 is greater than the transmittance of the light-shielding layer 6.

[0042] In some embodiments, see Figure 6 and Figure 7 , Figure 6 A transmittance curve diagram of a black pixel definition layer in a display panel provided in an embodiment of the present application, Figure 7 The transmittance curve of the light shielding layer in the display panel provided in the embodiment of the present application shows that the transmittance of the material of the black pixel definition layer 2 in the band of 750 nanometers to 980 nanometers is greater than 80%, the transmittance of the material of the light shielding layer 6 in the band of 300 nanometers to 900 nanometers is 0, and the transmittance of the material of the light shielding layer 6 in the band of 900 nanometers to 980 nanometers is less than 2%. The area between the edge of the first opening 22 and the edge of the second opening 61 has greatly improved transmittance to infrared light because there is no shielding by the light shielding layer 6. The black pixel definition layer 2 in the area between the edge of the first opening 22 and the edge of the second opening 61 can transmit most of the infrared light, especially near-infrared light, which can further improve the transmittance of the display panel to infrared light, thereby improving the accuracy of distance sensing of the photosensitive device.

[0043] In some embodiments, see Figure 5 and Figure 6 The material of the black pixel definition layer 2 has an average transmittance of 20% in the 300 nm to 750 nm band. Compared with the light shielding layer 6, the material of the black pixel definition layer 2 has a higher transmittance for visible light, thereby improving the sensitivity and accuracy of light sensing of the photosensitive device.

[0044] In some embodiments, see Figure 1The display panel 100 further includes a color filter layer 7, the color filter layer 7 includes a plurality of filter units 71, the light shielding layer 6 has a plurality of fourth openings 62, the second openings 61 and the fourth openings 62 are arranged at intervals, the fourth openings 62 and the third openings 21 are arranged in alignment, and the filter units 71 are arranged in the fourth openings 62. The filter units 71 can selectively transmit light of the same color as the corresponding light-emitting layer 3 below, and absorb light of other colors. The depolarizer structure formed by the color filter layer 7 and the light shielding layer 6 can replace the polarizer, so that the light extraction efficiency of the display panel can be improved while reducing the thickness of the display panel.

[0045] In some embodiments, the display panel 100 also includes an encapsulation layer 8 and a touch layer 9. The encapsulation layer 8 is arranged on the surface of the cathode 5 away from the light-emitting layer 3, the touch layer 9 is arranged on the surface of the encapsulation layer 8 away from the cathode 5, and the shading layer 6 and the color filter layer 7 are both arranged on the surface of the touch layer 9 away from the encapsulation layer 8.

[0046] In some embodiments, the encapsulation layer 8 is a thin film encapsulation structure, and the encapsulation layer 8 is composed of multiple inorganic encapsulation layers and at least one organic encapsulation layer (not shown in the figure) inserted between two adjacent inorganic encapsulation layers. For example, the encapsulation layer 8 is a three-layer thin film encapsulation structure in which a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer are stacked.

[0047] In some embodiments, the touch layer 9 includes at least a touch metal layer 91 and a touch insulating layer 92 . The touch metal layer 91 is disposed on a surface of the packaging layer 8 away from the cathode 5 , and the touch insulating layer 92 is disposed on the touch metal layer 91 .

[0048] In some embodiments, the display panel 100 includes a plurality of conductive layers, each conductive layer includes a plurality of conductive patterns, and the orthographic projection of the first opening 22 on the array substrate 1 is disposed separately from the orthographic projection of the conductive pattern on the array substrate 1 .

[0049] In some embodiments, the conductive layer 121 includes a gate layer and a source and drain layer in the array substrate. The conductive layer 121 may also include a touch metal layer disposed on the packaging layer 8. Taking the gate layer as an example, the gate layer includes multiple conductive patterns, and the conductive patterns may be patterned gates and scan lines; taking the source and drain layer as an example, the source and drain layer includes multiple conductive patterns, and the conductive patterns may be patterned sources, drains, and data lines; taking the touch metal layer as an example, the touch metal layer includes multiple conductive patterns, and the conductive patterns may be patterned touch electrodes and touch traces.

[0050] In some embodiments, see Figure 4 and Figure 5The source and drain layer includes a plurality of data lines 1211, and the gate layer includes a plurality of scanning lines 1212. The data lines 1211 and the scanning lines 1212 are cross-arranged and define a plurality of light-transmitting areas. No metal conductive film layer is arranged in the light-transmitting area. The black pixel definition layer 2 has a plurality of first openings 22, and the first openings 22 are arranged in the light-transmitting area, so as to prevent the metal conductive layer from blocking ambient light and infrared light.

[0051] According to the display panel provided in the above embodiment of the present application, the embodiment of the present application further provides a display device, see Figure 8 , Figure 8 The display device 1000 is a schematic structural diagram of a display device provided in an embodiment of the present application. The display device 1000 includes a photosensitive device 200 and a display panel 100 provided in any one of the above embodiments. The photosensitive device 200 is arranged on one side of the display panel 100.

[0052] See also Figures 1 to 8 The photosensitive device 200 is disposed on a side of the array substrate 1 away from the black pixel definition layer 2 , and the photosensitive device 200 is aligned with the first opening 22 .

[0053] In some embodiments, the black pixel definition layer 2 has a first opening 22 , and the photosensitive device 200 is disposed in alignment with the first opening 22 .

[0054] In some embodiments, the black pixel definition layer 2 has a plurality of first openings 22 , the plurality of first openings 22 are spaced apart and distributed between the plurality of adjacent third openings 21 , and the photosensitive device 200 is disposed in alignment with the plurality of first openings 22 .

[0055] In an embodiment of the present application, the photosensitive device 200 includes an infrared light sensor, which can be used for distance detection. The working logic of the photosensitive device 200 is as follows: the infrared light sensor may include a reflector and a receiver, the transmitter may be an infrared light emitting diode, and the receiver may be an infrared photodiode. Both the transmitter and the receiver may be aligned with one or more corresponding first openings 22. The infrared light emitted by the transmitter is emitted from the display panel through the first opening 22 and the second opening 61. When the infrared light encounters an object, it is reflected back to the display panel and is received by the receiver through the second opening 61 and the first opening 22. The receiver receives the infrared light and converts it into a corresponding electrical signal, which is output to the processor for further processing.

[0056] In some embodiments, the photosensitive device 200 may further include an ambient light sensor, which is a photodiode. The ambient light outside the display panel can be received by the ambient light sensor through the second opening 61 and the first opening 22. The ambient light sensor receives the ambient light and converts it into a corresponding electrical signal, which is output by the photosensitive device 200 to the processor for further processing. The ambient light sensor can be used to sense the brightness of visible light in the ambient light. The processor can adjust the brightness of the display panel according to the brightness of the ambient light sensed by the ambient light sensor. When the brightness of the ambient light is high, the processor can increase the brightness of the display panel to ensure a clear display effect; when the brightness of the ambient light is low, the processor can reduce the brightness of the display panel to achieve the purpose of saving power.

[0057] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a display panel and a display device, the display panel including an array substrate, a black pixel definition layer and a light shielding layer, the black pixel definition layer is arranged on one side of the array substrate, the light shielding layer is arranged on the side of the black pixel definition layer away from the array substrate, the black pixel definition layer has a first opening, the light shielding layer has a second opening, the diameter of the first opening or the diameter of the circumscribed circle is smaller than the diameter of the second opening or the diameter of the circumscribed circle, by forming the first opening on the black pixel definition layer with higher process precision and making the size of the second opening on the light shielding layer larger than the size of the first opening, so that high resolution can be achieved while avoiding the light shielding layer blocking the light passing through the first opening, thereby increasing the light transmittance at the first opening, thereby improving the sensitivity and accuracy of the photosensitive device.

[0058] In summary, although the present application is disclosed as above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application is based on the scope defined by the claims.

Claims

1. A display panel, characterized in that: The display panel further includes: An array substrate; A black pixel definition layer, disposed on one side of the array substrate, wherein the black pixel definition layer has a first opening; A light shielding layer is disposed on a side of the black pixel definition layer away from the array substrate, the light shielding layer has a second opening, and the second opening is disposed in alignment with the first opening; The diameter or the circumscribed circle diameter of the first opening is smaller than the diameter or the circumscribed circle diameter of the second opening.

2. The display panel according to claim 1, wherein: The diameter of the first opening or the diameter of the circumscribed circle is greater than or equal to 5 micrometers, and the diameter of the second opening or the diameter of the circumscribed circle is greater than 10 micrometers.

3. The display panel according to claim 1, wherein: The orthographic projection of the first opening on the array substrate is located within the orthographic projection of the second opening on the array substrate.

4. The display panel according to claim 3, wherein: Along a radial direction of the first opening, a minimum distance between an edge of the first opening and an edge of the second opening is greater than or equal to 2 micrometers.

5. The display panel according to claim 1, wherein: The light transmittance of the material of the black pixel definition layer is greater than the light transmittance of the material of the light shielding layer.

6. The display panel according to claim 1, wherein: The material of the black pixel definition layer has a light transmittance greater than 80% in the 750-980 nanometer band.

7. The display panel according to claim 1, wherein: The display panel further includes a light-emitting layer, the black pixel definition layer further includes a plurality of third openings, the light-emitting layer is disposed in the third openings, and the first openings are spaced apart from the third openings.

8. The display panel according to claim 7, wherein: The display panel also includes a color filter layer, the color filter layer includes a plurality of filter units, the shading layer has a plurality of fourth openings, the second openings are spaced apart from the fourth openings, the fourth openings are aligned with the third openings, and the filter units are arranged in the fourth openings.

9. The display panel according to claim 7, wherein: The black pixel definition layer has a plurality of the first openings, and each of the first openings is disposed between a plurality of adjacent third openings.

10. The display panel according to claim 1, wherein: The display panel includes a plurality of conductive layers, each of the conductive layers includes a plurality of conductive patterns, and an orthographic projection of the first opening on the array substrate is disposed separately from an orthographic projection of the conductive pattern on the array substrate.

11. A display device, characterized in that: It comprises a photosensitive device and a display panel as claimed in any one of claims 1 to 10, wherein the photosensitive device is arranged on one side of the display panel, and the photosensitive device is arranged in alignment with the first opening.

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