Display panel and display device

Abstract

The present invention relates to a display panel and a display device. The display panel includes a first display area and a second display area, and the second display area is circular with a width and a length both less than 5 millimeters. The display panel includes: a first pixel unit located on a substrate and in the first display area; the first pixel unit includes a first sub-pixel; a second pixel unit located on the substrate and in the second display area; the second pixel unit includes a second sub-pixel and a light-transmitting portion; a black matrix layer located on a packaging layer; a filter layer located on the black matrix layer, the filter layer includes a first filter sub-layer and a second filter sub-layer, the first filter sub-layer is located on the first sub-pixel, the second filter sub-layer is located on the second sub-pixel, the thickness of the second filter sub-layer is less than that of the first filter sub-layer, and the filter layer does not cover the light-transmitting portion. According to an embodiment of the present invention, it is beneficial to achieve uniform display and reduce the mura feeling of the display.

Description

Technical Field

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

[0002] In related technologies, there are increasingly high requirements for the screen-to-body ratio of electronic consumer products such as mobile phones. The water-drop screen and the notch screen have low aesthetics. Therefore, the under-screen camera technology that can achieve full-screen display urgently needs to be developed. Generally, a display area that can be used for both displaying and image capturing is set on the display panel. However, the brightness of this display area is lower than that of other display areas on the display panel, resulting in uneven display and a mura effect. Summary of the Invention

[0003] The present invention provides a display panel and a display device to solve the deficiencies in related technologies.

[0004] According to a first aspect of an embodiment of the present invention, a display panel is provided, including a first display area and a second display area, where the first display area and the second display area are adjacent. Among them, the second display area is circular, and both the width and the length are less than 5 millimeters; the display panel includes:

[0005] A substrate;

[0006] A first pixel unit, located on the substrate and in the first display area; the first pixel unit includes a first sub-pixel.

[0007] A second pixel unit, located on the substrate and in the second display area; the second pixel unit includes a second sub-pixel and a light-transmitting portion; the second display area includes an array of second pixel units, and each second pixel unit includes a second sub-pixel that emits red light, a second sub-pixel that emits green light, a second sub-pixel that emits blue light, and a light-transmitting portion.

[0008] An encapsulation layer, located on the first pixel unit and the second pixel unit.

[0009] A black matrix layer, located on the encapsulation layer.

[0010] A filter layer, located on the black matrix layer. The filter layer includes a first filter sub-layer and a second filter sub-layer. The first filter sub-layer is located on the first sub-pixel, the second filter sub-layer is located on the second sub-pixel, the thickness of the second filter sub-layer is less than the thickness of the first filter sub-layer, and the filter layer does not cover the light-transmitting portion.

[0011] In one embodiment, the thicknesses of the first filter sub-layer for red, the first filter sub-layer for green, and the first filter sub-layer for blue are different.

[0012] In one embodiment, among two adjacent second pixel units, the second sub-pixels emitting the same color light are not adjacent to each other.

[0013] In one embodiment, among two adjacent second pixel units, the second sub-pixels emitting red light are not adjacent to each other, the second sub-pixels emitting green light are not adjacent to each other, and the second sub-pixels emitting blue light are not adjacent to each other.

[0014] In one embodiment, the light-transmitting portions are not adjacent to each other, and the openings of the light-transmitting portions are the same as the openings of the second sub-pixels emitting red light, the second sub-pixels emitting green light, and the second sub-pixels emitting blue light.

[0015] In one embodiment, the thickness of the first photon filtering layer is 2 to 4 micrometers, and the thickness of the second photon filtering layer is 1 to 3 micrometers.

[0016] In one embodiment, the material of the light filtering layer is a low-temperature curing material.

[0017] In one embodiment, a pixel defining layer is further included, and the pixel defining layer is located between adjacent first sub-pixels, and / or the pixel defining layer is located between adjacent second sub-pixels, and / or the pixel defining layer is located between adjacent first sub-pixels and second sub-pixels.

[0018] In one embodiment, the black matrix layer is located between adjacent first photon filtering layers, and / or the black matrix layer is located between adjacent second photon filtering layers, and / or the black matrix layer is located between adjacent first photon filtering layers and second photon filtering layers;

[0019] The black matrix layer is located above the pixel defining layer, and the orthographic projection of the black matrix layer on the substrate falls within the orthographic projection of the pixel defining layer on the substrate.

[0020] In one embodiment, the material of the black matrix layer is a low-temperature curing material.

[0021] In one embodiment, the display panel further includes a backplane layer, the backplane layer is located on the substrate, a driving circuit layer is provided on the backplane layer, and the driving circuit layer is used to drive the first pixel unit and the second pixel unit to emit light; the driving circuit layer is not provided below the light-transmitting portion.

[0022] In one embodiment, the second sub-pixel includes a first anode, a first organic light-emitting layer, and a first cathode, the first organic light-emitting layer is located on the first anode, and the first cathode is located on the first organic light-emitting layer;

[0023] The light-transmitting part includes a first film layer and a second film layer. The first film layer is on the same layer as the first anode, and the second film layer is on the same layer as the first cathode. An organic light-emitting layer is not filled between the first film layer and the second film layer; or,

[0024] The light-transmitting part only includes the second film layer, and the second film layer is on the same layer as the first cathode.

[0025] In one embodiment, the first sub-pixel includes a second anode, the second sub-pixel includes a first anode, the second anode and the first anode are arranged on the same layer, the second anode is an ITO / Ag / ITO sandwich structure, and the first anode is a single-layer ITO structure.

[0026] In one embodiment, the first display area at least partially surrounds the second display area.

[0027] In one embodiment, the display panel may further include a protective layer, and the protective layer covers the black matrix layer and the light-filtering layer.

[0028] According to the second aspect of the embodiments of the present invention, a display device includes a photosensitive device and the display panel as described above;

[0029] The photosensitive device is located on a side of the substrate away from the light-filtering layer, and a positive projection of the photosensitive device on the substrate falls within the second display area.

[0030] According to the above embodiments, since the thickness of the second light-filtering sub-layer on the second sub-pixel in the second display area is smaller than the thickness of the first light-filtering sub-layer on the first sub-pixel in the first display area, in this way, the light transmittance of the second light-filtering sub-layer is greater than that of the first light-filtering sub-layer. Furthermore, the display brightness of the second display area can be improved. Therefore, the difference in the display brightness between the second display area and the first display area caused by the light-transmitting part existing in the second display area can be reduced, making the display brightness of the second display area closer to that of the first display area, which is beneficial to display uniformity and can weaken the mura feeling of the display.

[0031] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. Description of the Drawings

[0032] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0033] Figure 1 It is a schematic structural diagram of a display panel shown according to the embodiments of the present invention;

[0034] Figure 2 It is a schematic structural diagram of another display panel shown according to an embodiment of the present invention;

[0035] Figure 3 It is a schematic structural diagram of another display panel shown according to an embodiment of the present invention;

[0036] Figure 4 It is a schematic structural diagram of another display panel shown according to an embodiment of the present invention;

[0037] Figure 5 It is a chromaticity diagram shown according to an embodiment of the present invention;

[0038] Figure 6 It is a schematic structural diagram of a display device shown according to an embodiment of the present invention. Detailed implementation manners

[0039] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0040] In the related art, due to the reflection of the cathode metal on the external ambient light, the contrast and outdoor visibility of the screen of an organic light-emitting display device are low. A general solution is to attach a circular polarizer to reduce the reflectivity. However, due to the high cost of the polarizer and the low transmittance, the screen power consumption is high and the lifespan is low. The method to solve the above problems is to prepare a color resist structure (filter) on the encapsulation layer of the display device to replace the circular polarizer. According to simulation, its transmittance can reach about 60%, which is greatly improved compared with the circular polarizer.

[0041] On the other hand, due to the increasing requirements for the screen-to-body ratio of consumer products such as mobile phones in the market, the traditional water-drop screens and notch screens have low aesthetics. Therefore, the under-screen camera technology that can achieve full-screen display urgently needs to be developed. Generally, a "transparent display area" that can be used for both display and image acquisition is set on the display panel. In addition to the sub-pixels with red emission color, green emission color, and blue emission color required for normal display, the pixels in this display area also have a non-displaying transparent part. Since the light-emitting area of this "transparent display area" is smaller than that of other normal display areas, it is also called a "weak display area", that is, its brightness is lower than that of other display areas on the display panel. The brightness of the "transparent display area" is about 75% of the brightness of other display areas. The transmittance of the pixels in the "transparent display area" is about 50%. This phenomenon will lead to uneven display and a mura feeling on the display surface, bringing a bad experience to consumers.

[0042] To solve the above technical problems, embodiments of the present invention provide a display panel and a display device, which are beneficial to uniform display and can reduce the mura feeling of the display.

[0043] Embodiments of the present invention provide a display panel. As Figure 1 shown, the display panel 1 includes a first display area 11 and a second display area 12, and the first display area 11 and the second display area 12 are adjacent. As Figure 2 shown, the display panel includes: a substrate 21, a first pixel unit 22, a second pixel unit 23, a packaging layer 24, a black matrix layer 25, and a color filter layer 26.

[0044] As Figure 2 shown, the first pixel unit 22 and the second pixel unit 23 are located on the substrate 21. The first pixel unit 22 is located in the first display area 11, and the second pixel unit 23 is located in the second display area 12. The first pixel unit 22 includes a first sub-pixel (not shown), and the second pixel unit 23 includes a second sub-pixel (not shown) and a light-transmitting part 234. The packaging layer 24 is located on the first pixel unit 22 and the second pixel unit 23. The black matrix layer 25 is located on the packaging layer 24. The color filter layer 26 is located on the black matrix layer 25. The color filter layer 26 includes a first color filter sub-layer 261 and a second color filter sub-layer 262. The first color filter sub-layer 261 is located on the first sub-pixel, and the second color filter sub-layer 262 is located on the second sub-pixel. The thickness of the second color filter sub-layer 262 is less than the thickness of the first color filter sub-layer 261. The color filter layer 26 does not cover the light-transmitting part 234.

[0045] In this embodiment, since the thickness of the second photon filter layer on the second sub-pixels in the second display area is less than the thickness of the first photon filter layer on the first sub-pixels in the first display area, the light transmittance of the second photon filter layer is greater than that of the first photon filter layer. Thus, the display brightness of the second display area can be increased. Therefore, the difference in display brightness between the second display area and the first display area caused by the light-transmitting part in the second display area can be reduced, making the display brightness of the second display area closer to that of the first display area, which is beneficial to display uniformity and can weaken the mura sense of the display.

[0046] The display panel in the embodiment of the present invention has been briefly introduced above. Next, the display panel in the embodiment of the present invention will be introduced in detail.

[0047] The embodiment of the present invention also provides a display panel. As Figures 1-2 shown, the display panel 1 includes a first display area 11 and a second display area 12, and the first display area 11 is adjacent to the second display area 12. The first display area 11 may completely surround the second display area 12 or partially surround the second display area 12.

[0048] In this embodiment, the shape of the second display area 12 is rectangular, and the width of the second display area 12 is less than 5 mm, and the length is also less than 5 mm, but it is not limited thereto. Of course, the shape of the second display area 12 may also be circular, oval, etc., but it is not limited thereto.

[0049] In this embodiment, the second display area 12 is located in the upper part of the display panel 1. Of course, the second display area 12 may also be located in other parts of the display panel 1.

[0050] In this embodiment, as Figure 3 shown, the first display area 11 includes first pixel units 22 arranged in an array. Each first pixel unit 22 includes a first sub-pixel 31 that emits red light, a first sub-pixel 32 that emits green light, and a first sub-pixel 33 that emits blue light.

[0051] In this embodiment, as Figure 2 shown, the first sub-pixel 31 includes a second anode (not shown), a second organic light-emitting layer 221, and a second cathode (not shown). The second organic light-emitting layer 221 is located on the second anode, and the second cathode is located on the second organic light-emitting layer 221. The first sub-pixel 32 includes a second anode, a second organic light-emitting layer 222, and a second cathode. The second organic light-emitting layer 222 is located on the second anode, and the second cathode is located on the second organic light-emitting layer 222. The first sub-pixel 33 includes a second anode, a second organic light-emitting layer 223, and a second cathode. The second organic light-emitting layer 223 is located on the second anode, and the second cathode is located on the second organic light-emitting layer 223.

[0052] In this embodiment, as Figure 4 shown, the second display area 12 includes second pixel units 23 arranged in an array. Each second pixel unit 23 includes a second sub-pixel 41 that emits red light, a second sub-pixel 42 that emits green light, a second sub-pixel 43 that emits blue light, and a light-transmitting portion 234. As Figure 2 shown, the second sub-pixel 41 includes a first anode (not shown), a first organic light-emitting layer 231, and a first cathode (not shown). The first organic light-emitting layer 231 is located on the first anode, and the first cathode is located on the first organic light-emitting layer 231. The second sub-pixel 42 includes a first anode, a first organic light-emitting layer 232, and a first cathode. The first organic light-emitting layer 232 is located on the first anode, and the first cathode is located on the first organic light-emitting layer 232. The second sub-pixel 43 includes a first anode, a first organic light-emitting layer 233, and a first cathode. The first organic light-emitting layer 233 is located on the first anode, and the first cathode is located on the first organic light-emitting layer 233.

[0053] In this embodiment, as Figure 4 shown, in two adjacent second pixel units 23, the arrangement orders of the second sub-pixel 41 that emits red light, the second sub-pixel 42 that emits green light, the second sub-pixel 43 that emits blue light, and the light-transmitting portion 234 are different, and in two adjacent second pixel units 23, the second sub-pixels that emit the same color light are not adjacent. For example, in two adjacent second pixel units 23, the second sub-pixels 41 that emit red light are not adjacent, the second sub-pixels 42 that emit green light are not adjacent, the second sub-pixels 43 that emit blue light are not adjacent, and the light-transmitting portions 234 are not adjacent. In this way, it is beneficial to achieve uniform display.

[0054] In this embodiment, the opening of the light-transmitting portion 234 is substantially the same as the openings of the second sub-pixel 41 that emits red light, the second sub-pixel 42 that emits green light, and the second sub-pixel 43 that emits blue light, but is not limited thereto.

[0055] In this embodiment, the second cathode and the first cathode can share the same planar electrode. The planar electrode can be prepared using a magnesium-silver alloy. The second anode and the first anode are in the same layer. The second anode can be an ITO / Ag / ITO sandwich structure. The first anode can be an ITO / Ag / ITO sandwich structure or a single-layer ITO, but is not limited thereto.

[0056] In this embodiment, the light-transmitting portion 234 includes a first film layer (not shown) and a second film layer (not shown). The first film layer is in the same layer as the first anode, and the second film layer is in the same layer as the first cathode. No organic light-emitting layer is filled between the first film layer and the second film layer. The material of the first film layer can be the same as the material of the first anode and is prepared in the same manufacturing process. The material of the second film layer can be the same as the material of the first cathode and is prepared in the same manufacturing process. In this way, the light transmittance of the light-transmitting portion can be improved.

[0057] In another embodiment, the light-transmitting portion 234 may include only the second film layer, without including the first film layer and the organic light-emitting layer. The second film layer is in the same layer as the first cathode. The material of the second film layer may be the same as that of the first cathode and is prepared in the same manufacturing process. In this way, the light transmittance of the light-transmitting portion can be increased.

[0058] In this embodiment, as Figure 2 shown, the display panel 1 further includes a pixel defining layer 27, which is located between adjacent first sub-pixels, between adjacent second sub-pixels, and between adjacent first and second sub-pixels. Specifically, the pixel defining layer 27 is located between adjacent second organic light-emitting layers 221 and 222, between adjacent second organic light-emitting layers 222 and 223, between adjacent second organic light-emitting layers 223 and the first organic light-emitting layer 231, between adjacent first organic light-emitting layers 231 and 232, between adjacent first organic light-emitting layers 232 and 233, and also between the first organic light-emitting layer 233 and the light-transmitting portion 234.

[0059] In this embodiment, the black matrix layer 25 is located between adjacent first color filter layers. Specifically, as Figure 2 shown, the first color filter layer 261 includes a red first color filter layer 2611, a green first color filter layer 2612, and a blue first color filter layer 2613. The red first color filter layer 2611 is located above the first sub-pixel 31 and only allows the red light emitted by the first sub-pixel 31 to pass through, prohibiting the passage of light of other colors. The green first color filter layer 2612 is located above the first sub-pixel 32 and only allows the green light emitted by the first sub-pixel 32 to pass through, prohibiting the passage of light of other colors. The blue first color filter layer 2613 is located above the first sub-pixel 33 and only allows the blue light emitted by the first sub-pixel 33 to pass through, prohibiting the passage of light of other colors. The black matrix layer 25 is located between adjacent first color filter layers 2613 and 2611, between adjacent first color filter layers 2611 and 2612, and between adjacent first color filter layers 2612 and 2613.

[0060] In this embodiment, the thickness of the red first color filter layer 2611, the thickness of the green first color filter layer 2612, and the thickness of the blue first color filter layer 2613 are the same. Of course, the thickness of the red first color filter layer 2611, the thickness of the green first color filter layer 2612, and the thickness of the blue first color filter layer 2613 may also be different.

[0061] In this embodiment, as Figure 2As shown, the black matrix layer 25 is located between adjacent second photon filtering layers and between adjacent first and second photon filtering layers. Specifically, as Figure 2 shown, the second photon filtering layer 262 includes a red second photon filtering layer 2621, a green second photon filtering layer 2622, and a blue second photon filtering layer 2623. The red second photon filtering layer 2621 is located above the second sub-pixel 41, allowing only the red light emitted by the second sub-pixel 41 to pass through and prohibiting the passage of light of other colors. The green second photon filtering layer 2622 is located above the second sub-pixel 42, allowing only the green light emitted by the second sub-pixel 42 to pass through and prohibiting the passage of light of other colors. The blue second photon filtering layer 2623 is located above the second sub-pixel 43, allowing only the blue light emitted by the second sub-pixel 43 to pass through and prohibiting the passage of light of other colors. The black matrix layer 25 is located between adjacent first and second photon filtering layers 2613 and 2621, between adjacent second photon filtering layers 2621 and 2622, and between adjacent second photon filtering layers 2622 and 2623.

[0062] In this embodiment, the black matrix layer 25 is located above the pixel defining layer 27, and the orthographic projection of the black matrix layer 25 on the substrate 21 falls within the orthographic projection of the pixel defining layer 27 on the substrate 21. In this way, the influence of the black matrix layer 25 on the light extraction efficiency can be avoided, which is beneficial to improving the display brightness.

[0063] In this embodiment, the thickness of the first photon filtering layer 261 is 3 μm. Of course, the thickness of the first photon filtering layer 261 can also be 2 μm or 4 μm. In short, the thickness range of the first photon filtering layer 261 is 2 μm to 4 μm.

[0064] In this embodiment, the thickness of the second photon filtering layer 262 is 2 μm. Of course, the thickness of the second photon filtering layer 262 can also be 1 μm or 3 μm. In short, the thickness range of the second photon filtering layer 262 is 1 to 3 μm.

[0065] Table 1 shows the transmittance data obtained by adjusting the thickness of the second photon filtering layer 262. It can be seen from Table 1 that when the thickness of the second photon filtering layer 262 is reduced, the total transmittance shows an upward trend. Among them, the total transmittance is the transmittance of the second display area. For example, when the thickness of the second photon filtering layer 262 is reduced to 1.5 μm, the transmittance can be increased to the required 66%.

[0066] Table 2 shows the chromaticity change values of the second display area after adjusting the thickness of the second photon filtering layer. It can be seen that when the thickness of the second photon filtering layer is reduced from 2.5 um to 1.5 um, the chromaticity changes of R (red) and B (blue) are both within 0.005. The chromaticity change of G (green) is slightly larger, but due to the large color tolerance of G, this chromaticity change is also within the acceptable range. This result shows that although the thickness of the second photon filtering layer is different from that of the first photon filtering layer, the chromaticity difference is negligible to the human eye.

[0067] Table 1

[0068] Thickness of the second photon filtering layer (μm) Total transmittance 2.5 52％ 2 59％ 1.5 66％ 1 75％

[0069] Table 2

[0070]

[0071]

[0072] Among them, the introduction to color tolerance is as follows: MacAdam proved through experiments that the human eye believes Figure 5 that all colors within the same ellipse 51 in [the figure] are the same color. Therefore, it can be concluded that the color coordinates in the CIE1931 chromaticity diagram are non-uniform, and the distance between two points cannot fully represent the difference between two colors. Obviously, the cyan-green direction (upper left direction) has a larger color tolerance than the magenta-red direction (lower right direction). Figure 5 In [the figure], the abscissa is the x color coordinate and the ordinate is the y color coordinate.

[0073] In this embodiment, the material of the light filtering layer 26 is a low-temperature curing material.

[0074] In this embodiment, the material of the black matrix layer 25 is a low-temperature curing material. The black matrix layer 25 can be directly fabricated on the encapsulation layer 24 through process flows such as "coating → exposure → development".

[0075] In this embodiment, as Figure 2 shown, the display panel 1 may further include a protective layer 28.

[0076] In this embodiment, the display panel 1 may further include a backplane layer. The backplane layer is located on the substrate 21. A driving circuit layer (not shown) may be provided on the backplane layer for driving the first pixel unit 22 and the second pixel unit 23 to emit light.

[0077] In this embodiment, a driving circuit layer may not be provided below the light-transmitting portion 234. Specifically, the driving circuit layer may include vias, and the orthographic projection of the vias on the substrate 21 falls within the orthographic projection of the light-transmitting portion 234 on the substrate 21. In this way, the light transmittance of the second display area can be improved.

[0078] An embodiment of the present invention also provides a display device, such as Figure 6 As shown, the display device 6 includes a photosensitive device 61 and the display panel 1 described in any of the above embodiments.

[0079] The photosensitive device 61 is located on the side of the substrate 21 away from the filter layer 26, and the orthographic projection of the photosensitive device 61 on the substrate 21 falls within the second display area 12.

[0080] In this embodiment, the photosensitive device 61 may be an image sensor (camera), an ambient light sensor, or a distance sensor, but is not limited thereto.

[0081] In this embodiment, the display device may further include a touch layer (not shown). The touch layer may be located above the filter layer 26, but is not limited thereto.

[0082] In this embodiment, since the thickness of the second filter photon layer on the second sub-pixel in the second display area is smaller than the thickness of the first filter photon layer on the first sub-pixel in the first display area, in this way, the light transmittance of the second filter photon layer is greater than that of the first filter photon layer. Furthermore, the display brightness of the second display area can be improved. Therefore, the difference in display brightness between the second display area and the first display area caused by the light-transmitting portion existing in the second display area can be reduced, making the display brightness of the second display area closer to that of the first display area, which is beneficial to display uniformity and can weaken the mura sense of the display.

[0083] It should be noted that the display device in this embodiment may be: an electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator, or any other product or component with a display function.

[0084] It should be pointed out that in the drawings, the dimensions of layers and regions may be exaggerated for the sake of clarity of illustration. Moreover, it can be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be an intermediate layer. Additionally, it can be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element, or there may be more than one intermediate layer or element. Additionally, it can also be understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Like reference numerals throughout indicate like elements.

[0085] In the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise clearly defined.

[0086] Other embodiments of the present invention will be readily apparent to those skilled in the art upon consideration of the specification and practice of the disclosure herein. The present invention is intended to cover any variations, uses, or adaptations of the invention following the general principles of the invention and including known common general knowledge or conventional technical means in the technical field of the invention not disclosed herein. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the invention are pointed out by the following claims.

[0087] It should be understood that the present invention is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A display panel, characterized in that, It includes a first display area and a second display area. The first display area is adjacent to the second display area. Among them, the second display area is circular, and both the width and the length are less than 5 millimeters. The display panel includes: a substrate; a first pixel unit, which is located on the substrate and in the first display area; the first pixel unit includes a first sub-pixel; a second pixel unit, which is located on the substrate and in the second display area; the second pixel unit includes a second sub-pixel and a light-transmitting part; the second display area includes an array of second pixel units, and each second pixel unit includes a second sub-pixel that emits red light, a second sub-pixel that emits green light, a second sub-pixel that emits blue light, and a light-transmitting part; a packaging layer, which is located on the first pixel unit and the second pixel unit; a black matrix layer, which is located on the packaging layer; a filter layer, which is located on the black matrix layer. The filter layer includes a first filter sub-layer and a second filter sub-layer. The first filter sub-layer is located on the first sub-pixel, and the second filter sub-layer is located on the second sub-pixel. The thickness of the second filter sub-layer is less than the thickness of the first filter sub-layer. The filter layer does not cover the light-transmitting part.

2. The display panel according to claim 1, wherein The thicknesses of the first filter sub-layers of red, green, and blue are different.

3. The display panel according to claim 1, wherein Among two adjacent second pixel units, the second sub-pixels that emit the same color of light are not adjacent.

4. The display panel according to claim 1, wherein Among two adjacent second pixel units, the second sub-pixels that emit red light are not adjacent, the second sub-pixels that emit green light are not adjacent, and the second sub-pixels that emit blue light are not adjacent.

5. The display panel according to claim 1 or 4, characterized in that, The light-transmitting parts are not adjacent, and the openings of the light-transmitting parts are the same as the openings of the second sub-pixels that emit red light, the second sub-pixels that emit green light, and the second sub-pixels that emit blue light.

6. The display panel according to claim 1, wherein, The thickness of the first filter sub-layer is 2 to 4 micrometers, and the thickness of the second filter sub-layer is 1 to 3 micrometers.

7. The display panel according to claim 1, wherein The material of the filter layer is a low-temperature curing material.

8. The display panel according to claim 1, wherein It further includes a pixel defining layer. The pixel defining layer is located between adjacent first sub-pixels, and / or the pixel defining layer is located between adjacent second sub-pixels, and / or the pixel defining layer is located between adjacent first sub-pixels and second sub-pixels.

9. The display panel according to claim 8, wherein The black matrix layer is located between adjacent first filter sub-layers, and / or the black matrix layer is located between adjacent second filter sub-layers, and / or the black matrix layer is located between adjacent first filter sub-layers and second filter sub-layers; The black matrix layer is located above the pixel defining layer, and the orthographic projection of the black matrix layer on the substrate falls within the orthographic projection of the pixel defining layer on the substrate.

10. The display panel according to claim 1, characterized in that, The material of the black matrix layer is a low-temperature curing material.

11. The display panel according to claim 1, wherein, The display panel further includes a backplane layer. The backplane layer is located on the substrate, and a driving circuit layer is provided on the backplane layer. The driving circuit layer is used to drive the first pixel unit and the second pixel unit to emit light; There is no driving circuit layer below the light-transmitting part.

12. The display panel according to claim 1, wherein The second sub-pixel includes a first anode, a first organic light-emitting layer, and a first cathode. The first organic light-emitting layer is located on the first anode, and the first cathode is located on the first organic light-emitting layer; The light-transmitting portion includes a first film layer and a second film layer. The first film layer is in the same layer as the first anode, the second film layer is in the same layer as the first cathode, and no organic light-emitting layer is filled between the first film layer and the second film layer; or, The light-transmitting portion only includes the second film layer, and the second film layer is in the same layer as the first cathode.

13. The display panel according to claim 1, wherein The first sub-pixel includes a second anode, and the second sub-pixel includes a first anode. The second anode and the first anode are arranged in the same layer. The second anode is an ITO / Ag / ITO sandwich structure, and the first anode is a single-layer ITO structure.

14. The display panel according to claim 1, wherein The first display area at least partially surrounds the second display area.

15. The display panel according to claim 1, characterized in that, The display panel may further include a protective layer, and the protective layer covers the black matrix layer and the color filter layer.

16. A display device, characterized in that, A photosensitive device and the display panel according to any one of claims 1 to 15; The photosensitive device is located on a side of the substrate away from the color filter layer, and a positive projection of the photosensitive device on the substrate falls within the second display area.

Images