Display panel and display device

Abstract

The present disclosure provides a display panel and a display device. The display panel in the present disclosure includes a display area, which includes a first display area and a light-transmitting second display area. A plurality of light-emitting devices are arranged in the display area. A pixel definition layer is located in the display area and is provided with a plurality of openings for defining the light-emitting devices. A plurality of reflective layers are respectively disposed on the sidewalls of the openings in the pixel definition layer that are located in the second display area. In this display panel, by providing a reflective layer on the sidewalls of the openings in the pixel definition layer that are located in the second display area, the brightness difference between the light-transmitting second display area and the first display area can be reduced.

Description

Technical Field

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

[0002] With the continuous development of display panel technology, people's requirements for display panels are getting higher and higher. How to achieve a full-screen display has become a hot research topic. The under-screen camera technology is considered to be the ultimate solution for a true full-screen display. In this design of the under-screen camera, there is no need to punch holes in the screen, and the camera is hidden under the screen. This design can make the screen-to-body ratio of the display device close to 100%.

[0003] Under the above design, the area of the screen corresponding to the camera needs to be designed to be light-transmissive, which will limit the design of the pixel structure and reduce the display effect. Summary of the Invention

[0004] The present disclosure provides a display panel and a display device, by providing a reflective layer on the sidewalls of the openings in the pixel definition layer located in the second display area, to solve the technical problem that there is a brightness difference between the light-transmissive display area and the non-light-transmissive display area of the display panel.

[0005] In a first aspect of the present disclosure, a display panel is provided. The display panel includes a display area, the display area includes a first display area and a light-transmissive second display area. The display panel further includes a plurality of light-emitting devices, a pixel definition layer, and a plurality of reflective layers. The light-emitting devices are arranged in the display area, the pixel definition layer is located in the display area and is provided with a plurality of openings for defining the light-emitting devices, and the plurality of reflective layers are respectively provided on the sidewalls of the openings in the pixel definition layer located in the second display area.

[0006] In the above solution, by providing a reflective layer on the sidewalls of the openings in the pixel definition layer located in the second display area, the light-emitting intensity of the second display area of the display panel can be enhanced, so the brightness difference between the first display area and the second display area is reduced.

[0007] In a specific embodiment of the first aspect of the present disclosure, the area of the projection of the opening located in the first display area on the plane where the display panel is located is larger than the area of the projection of the opening located in the second display area on the plane where the display panel is located.

[0008] In the above solution, the area of the opening of the pixel definition layer located in the second display area is smaller. When the pixel arrangement density in the first display area and the second display area is the same, in the first display area and the second display area with the same area, the light-transmissive area of the second display area is larger, so that the light transmittance of the second display area can be improved, which is convenient for image acquisition.

[0009] In a specific embodiment of the first aspect of the present disclosure, from the display side of the display panel to the side opposite to the display side, the sidewall of the opening includes a first end and a second end, and the orthographic projection of the second end on the plane where the display panel is located is located within the orthographic projection of the first end on the plane where the display panel is located.

[0010] In the above solution, the sidewall of the opening of the pixel definition layer is inclined outward, and the cross-section of the opening is approximately an inverted trapezoid, which changes the light output direction, increases the light output amount at a large viewing angle, and further increases the brightness of the second display area of the display panel at a large viewing angle.

[0011] In a specific embodiment of the first aspect of the present disclosure, the orthographic projection of the reflective layer on the plane where the display panel is located coincides with the orthographic projection of the sidewall of the opening on the plane where the display panel is located.

[0012] In the above solution, the reflective layer covers the entire sidewall of the opening located in the second display area, which maximizes the reflection area of the sidewall without affecting the light transmittance of the second display area, thereby increasing the brightness of the second display area.

[0013] In a specific embodiment of the first aspect of the present disclosure, the reflective layer covers the sidewall of the opening and extends to a main surface of the pixel definition layer, and adjacent reflective layers are spaced apart from each other.

[0014] In the above solution, the reflective layer extends to a main surface of the pixel definition layer, increasing the reflection area of the pixel definition layer located in the second display area, thereby increasing the light output amount and further increasing the brightness of the second display area.

[0015] In a specific embodiment of the first aspect of the present disclosure, the reflective layer is a semi-transmissive and semi-reflective layer or a fully reflective layer.

[0016] In the above solution, when the reflective layer is set as a semi-transmissive and semi-reflective layer, the light transmittance of the second display area can be increased while reducing the brightness difference between the first display area and the second display area.

[0017] For example, further, the material of the reflective layer includes at least one of a metal and a metal oxide.

[0018] In a specific embodiment of the first aspect of the present disclosure, the light-emitting device includes an anode, a common layer, a light-emitting layer, and a cathode stacked in sequence, a plurality of light-emitting devices share the same common layer, and the reflective layer is located between the pixel definition layer and the common layer.

[0019] In the above solution, the common layer can isolate the reflective layer and the cathode, so that even if the reflective layer is a conductor material, short circuits between the respective film layers of the light-emitting device can be avoided (for example, short circuits between the anode and the cathode through the reflective layer).

[0020] For example, further, the common layer includes at least one of a hole injection layer, a hole transport layer, and an electron blocking layer.

[0021] In a specific embodiment of the first aspect of the present disclosure, at least one recess is provided on the sidewall of the opening, and the reflective layer is conformal with the sidewall of the opening.

[0022] In the above solution, providing the recess can increase the area of the reflective layer to increase the reflectivity of the sidewall, achieving the effect of increasing the brightness of the second display area.

[0023] In a specific embodiment of the first aspect of the present disclosure, a plurality of recesses are provided.

[0024] For example, further, the shapes of the recesses are the same as each other.

[0025] For example, further, the distances between adjacent recesses are equal.

[0026] For example, further, the recess is a strip-shaped groove that extends in a direction from the display side of the display panel to the side opposite to the display side.

[0027] For example, further, the cross-sectional shape of the strip-shaped groove parallel to the plane where the display panel is located is arc-shaped.

[0028] In this embodiment, such a setting can make the light emitted by the light-emitting device evenly distributed in all directions.

[0029] The second aspect of the present disclosure provides a display device, which includes an image acquisition device and a display panel as in the first aspect above. The image acquisition device is located on the side of the display panel opposite to the display side, and the orthographic projection of the image acquisition device on the plane where the display panel is located at least partially coincides with the second display area of the display panel.

[0030] The display panel in the present disclosure includes a display area, which includes a first display area and a light-transmissive second display area. A plurality of light-emitting devices are arranged in the display area. The pixel definition layer is located in the display area and is provided with a plurality of openings for defining the light-emitting devices. A plurality of reflective layers are respectively provided on the sidewalls of the openings in the pixel definition layer located in the second display area. In this display panel, by providing a reflective layer on the sidewall of the opening in the pixel definition layer located in the second display area, the brightness difference between the light-transmissive second display area and the first display area can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a top view of a display panel provided by an embodiment of the present disclosure.

[0032] Figure 2 It is the display panel provided by an embodiment of the present disclosure with some light-emitting devices omitted alongFigure 1 Cross-sectional view along line XX'.

[0033] Figure 3 The cross-sectional view along line XX' of the display panel provided by an embodiment of the present disclosure with some light-emitting devices omitted Figure 1 Cross-sectional view along line XX'.

[0034] Figure 4 The cross-sectional view along line YY' of the display panel provided by an embodiment of the present disclosure Figure 2 Cross-sectional view along line YY'.

[0035] Figure 5 The cross-sectional view along line YY' of the display panel provided by an embodiment of the present disclosure Figure 2 Cross-sectional view along line YY'.

[0036] Figure 6 The cross-sectional view along line XX' of the display panel provided by an embodiment of the present disclosure Figure 1 Cross-sectional view along line XX'.

[0037] Figure 7 The cross-sectional view along line XX' of the display panel provided by an embodiment of the present disclosure Figure 1 Cross-sectional view along line XX'.

[0038] Figure 8 Cross-sectional view of the display device provided by an embodiment of the present disclosure

[0039] Reference numerals:

[0040] 100 - Display panel; 101 - First display area; 102 - Second display area; 10 - Pixel definition layer; 10a - First opening; 10b - Second opening; 11 - Strip-shaped groove; 20 - Light-emitting device; 21 - Anode; 22 - Common layer; 23 - Light-emitting layer; 24 - Another common layer; 25 - Cathode; 30 - Reflective layer; 40 - Substrate; 200 - Display device; 201 - Image acquisition device; 110 - First sub-pixel; 120 - Second sub-pixel. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present disclosure will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

[0042] In the design of an under-screen camera, the screen always needs to have a hole dug, and the camera is hidden on the side opposite to the display side of the display panel. In the display panel, the area corresponding to the camera needs to have both a display function and light transmissibility to facilitate image acquisition by the camera. To improve the light transmissibility of the area corresponding to the camera in the display panel, without changing the number of pixels, the area of each pixel in this area is reduced, thereby reducing the total pixel density per unit area of this area and increasing the total light transmissible area per unit area of this area, achieving the effect of increasing the light transmittance of this area. However, the reduction of the total pixel area per unit area in the area corresponding to the camera in the display panel will cause the brightness of this area to decrease. Compared with other non-light-transmissive areas, the brightness difference between the two is obvious. Especially at a large viewing angle, the brightness of the light-transmissive area is significantly less than that of the non-light-transmissive area, affecting the display effect.

[0043] In view of this, the present disclosure provides a display panel. By providing a reflective layer on the sidewall of the second opening located in the second display area of the pixel definition layer, the reflectivity of the sidewall of the second opening is increased, so that the light output intensity of the pixel definition layer located in the second display area is increased, thereby solving the problem of the brightness difference between the second display area and the first display area of the display panel.

[0044] Figure 1 Shown is a schematic structural diagram of a display panel provided by an embodiment of the present disclosure. As Figure 1 shown, the display panel includes a display area, and the display area includes a first display area 101 and a light-transmissive second display area 102. The pixel definition layer 10 is located in the display area and is provided with a plurality of openings for defining light-emitting devices. Specifically, the openings of the pixel definition layer 10 include a second opening 10b located in the second display area 102 and a first opening 10a located in the first display area 101. The light-emitting devices 20 in the plurality of openings constitute the pixels of the display panel. The second display area 102 has a display function and at the same time has light transmissibility to facilitate image acquisition by the camera below. Specifically, an image acquisition device (for example, a camera) is arranged on the non-display side of the display panel, and the light on the display side of the display panel is transmitted through the gaps between the plurality of pixels in the second display area 102 to the image acquisition device, realizing the acquisition function of the image acquisition device. The area of the projection of the opening located in the first display area 101 on the plane where the display panel is located is larger than the area of the projection of the opening located in the second display area 102 on the plane where the display panel is located. That is to say, the area of the second opening 10b of the pixel definition layer 10 in the second display area 102 is smaller than the area of the first opening 10a in the first display area 101. This can improve the light transmissibility of the second display area to facilitate image acquisition by the camera.

[0045] It should be understood that Figure 1The shape of the opening shown is square, but the present application is not used to limit the shape of the opening, and the shape of the opening can be any shape such as circular, rectangular or polygonal.

[0046] Referring to Figure 2 , in an embodiment of the present disclosure, the display panel includes a pixel definition layer 10 and a plurality of reflective layers 30. The pixel definition layer 10 is located in the display area and is provided with a plurality of openings for defining light-emitting devices (not shown). A plurality of light-emitting devices are respectively arranged in the plurality of openings. The plurality of reflective layers 30 are respectively arranged on the side walls of the second openings 10b in the pixel definition layer 10 located in the second display area 102. Specifically, the reflective layer 30 at least covers a part of the side walls of the second openings 10b, and the reflectivity of the reflective layer 30 is greater than the reflectivity of the pixel definition layer 10. Optionally, the reflective layer 30 can be formed by any one of chemical vapor deposition or physical vapor deposition processes.

[0047] In an embodiment of the present disclosure, the display panel further includes a substrate on the side opposite to the light-emitting side of the pixel definition layer. An anode array of a plurality of light-emitting devices is arranged on the substrate, and the plurality of openings of the pixel definition layer respectively expose the plurality of anodes. For example, the substrate can be an array substrate.

[0048] Compared with the case where the reflective layer 30 is not provided, providing the reflective layer 30 on the side walls of the second openings 10b in the pixel definition layer 10 located in the second display area 102 increases the reflection ability of the second openings 10b in the second display area 102, and enhances the light output intensity of the display panel in the second display area 102. Therefore, the brightness difference between the first display area 101 and the second display area 102 is reduced.

[0049] In order to further reduce the brightness difference between the first display area 101 and the second display area 102 at a large viewing angle, in an embodiment of the present disclosure, from the display side of the display panel to the side opposite to the display side, the side walls of the second openings 10b include a first end and a second end, and the orthographic projection of the second end on the plane where the display panel is located is within the orthographic projection of the first end on the plane where the display panel is located. Referring to Figure 2 . That is to say, the side walls of the second openings 10b are inclined outward, and the cross-section of the second openings 10b is approximately an inverted trapezoid. Optionally, the angle between the side walls of the second openings 10b and the main surface of the pixel definition layer 10 can be 20 degrees - 70 degrees. Since the reflective layer 30 is conformal with the side walls of the second openings 10b, the reflective layer 30 is also inclined outward, which can change the light output direction, increase the light output amount at a large viewing angle, and further increase the brightness of the second display area 102 of the display panel at a large viewing angle.

[0050] In order to further increase the brightness of the second display area 102 and reduce the brightness difference between the first display area 101 and the second display area 102, in an embodiment of the present disclosure, the orthographic projection of the reflective layer 30 on the plane where the display panel is located coincides with the orthographic projection of the side wall of the second opening 10b on the plane where the display panel is located. See Figure 2 . Specifically, the reflective layer 30 extends from the bottom of the side wall of the second opening 10b to the top of the side wall, and the top of the side wall is the position in contact with the main surface of the pixel defining layer 10. That is to say, the reflective layer 30 covers the entire side wall of the second opening 10b located in the second display area 102. Without affecting the light transmittance of the second display area 102, the reflection area of the side wall of the second opening 10b is maximized, so that the brightness of the second display area 102 can be increased.

[0051] In order to further increase the brightness of the second display area 102 and reduce the brightness difference between the first display area 101 and the second display area 102, in an embodiment of the present disclosure, the reflective layer 30 covers the side wall of the second opening 10b and extends to a main surface of the pixel defining layer 10, and adjacent reflective layers 30 are spaced apart from each other. See Figure 3 . The reflective layer 30 extends to the main surface of the pixel defining layer 10, increasing the area of the reflective layer 30, so that more light is reflected, achieving the effect of increasing the brightness of the second display area 102.

[0052] In an embodiment of the present disclosure, the reflective layer 30 is a semi-transmissive and semi-reflective layer. Specifically, the material of the reflective layer 30 includes at least one of metals and metal oxides. For example, the material of the reflective layer is any one of silver, molybdenum, aluminum, titanium, and neodymium. The reflective layer 30 can also be a composite material or can have a multi-layer structure. The present disclosure does not limit the specific material of the reflective layer 30. The thickness of the reflective layer 30 is 5 nm - 100 nm. Setting the reflective layer 30 as a semi-transmissive and semi-reflective layer can increase the light transmittance of the second display area 102 while reducing the brightness difference between the first display area 101 and the second display area 102.

[0053] The reflective layer 30 is a total reflection layer. The reflective layer 30 being a total reflection layer can increase the brightness of the second display area 102. Specifically, the material of the reflective layer 30 is silver. The thickness of the reflective layer 30 is 0.1 μm - 1 μm. And the material of the reflective layer 30 is silver with a relatively large refractive index, which can increase the brightness of the second display area 102.

[0054] For a more detailed introduction to the setting of the pixel defining layer 10, such as Figure 4 and Figure 5As shown, at least one recess is provided on the sidewall of the second opening 10b, and the reflective layer 30 is conformal to the sidewall of the second opening 10b. Providing the recess can increase the area of the reflective layer 30 to increase the reflectivity of the sidewall of the second opening 10b, achieving the effect of increasing the brightness of the second display area 102.

[0055] In an embodiment of the present disclosure, a plurality of recesses are provided, the shapes of the recesses are the same as each other, and a plurality of recesses are provided with equal distances between adjacent recesses. For example, referring to Figure 4 , four recesses are provided on the sidewall of the second opening 10b, referring to Figure 5 , eight recesses are provided on the sidewall of the second opening 10b. Further, the recesses may be arranged periodically or in an array so that the light emitted by the light-emitting device 20 is evenly distributed in all directions.

[0056] In an embodiment of the present disclosure, the recess is a strip-shaped groove 11, and the strip-shaped groove 11 extends in a direction from the display side of the display panel to the side opposite to the display side, referring to Figure 4 and Figure 5 . That is, the strip-shaped groove 11 extends from the bottom of the sidewall to the main surface of the pixel defining layer 10, and the two end points of the strip-shaped groove 11 are collinear with the orthographic projection of the display panel and the orthographic projection of the center of the second opening 10b on the display panel. Further, a plurality of strip-shaped grooves 11 are centrosymmetric with each other so that the light emitted by the light-emitting device 20 is evenly distributed in all directions.

[0057] In this embodiment, the recess is a strip-shaped groove 11, and the strip-shaped groove 11 extends in a direction from the display side of the display panel to the side opposite to the display side, so that the second opening 10b and the strip-shaped groove 11 can be formed by a single photolithography process. The shapes of the second opening 10b and the strip-shaped groove 11 can be controlled by using the shape of the mask plate, and the second opening 10b and the strip-shaped groove 11 are formed simultaneously. This method can improve the processing efficiency. In other embodiments, the second opening 10b may also be formed first, and then a plurality of recesses located on the sidewall of the second opening 10b are formed by using multiple etching methods. The shapes of the recesses may be any shapes such as circular and square.

[0058] In an embodiment of the present disclosure, the cross-sectional shape of the strip-shaped groove 11 parallel to the plane of the display panel is arc-shaped so that the light emitted by the light-emitting device 20 is evenly distributed in all directions.

[0059] Further, the angle of the arc is less than 180 degrees to prevent the edge of the groove from blocking part of the light from exiting and causing a reduction in the reflectivity of the sidewall of the second opening 10b. At the same time, the angle of the arc being less than 180 degrees can also facilitate the uniform formation of the reflective layer 30 on the groove.

[0060] To introduce the settings of the display panel in more detail, such as Figure 6 As shown, the light-emitting device 20 includes an anode 21, a common layer 22, a light-emitting layer 23, and a cathode 25 stacked in sequence. A plurality of light-emitting devices 20 share the same common layer 22, and a reflective layer 30 is located between the pixel defining layer 10 and the common layer 22. The common layer 22 is located between the anode 21 and the light-emitting layer 23. Optionally, the common layer 22 includes at least one of a hole injection layer, a hole transport layer, and an electron blocking layer. In this embodiment, the common layer 22 includes a hole injection layer, a hole transport layer, and an electron blocking layer stacked in sequence along the direction from the anode 21 to the light-emitting layer 23.

[0061] The common layer 22 covers the reflective layer 30 and isolates the reflective layer 30 and the cathode 25. The common layer 22 can isolate the reflective layer 30 and the cathode 25, so that even if the reflective layer is a conductor material, short circuits between the respective film layers of the light-emitting device 20 can be avoided (for example, short circuits between the anode and the cathode through the reflective layer).

[0062] Furthermore, as Figure 7 shown, the light-emitting device 20 further includes another common layer 24 located between the light-emitting layer 23 and the cathode 25. Optionally, the another common layer 24 may include at least one of a hole blocking layer, an electron transport layer, and an electron injection layer. In this embodiment, the another common layer 24 includes a hole injection layer, a hole transport layer, and an electron blocking layer stacked in sequence along the direction from the light-emitting layer 23 to the cathode 25.

[0063] Furthermore, the display panel further includes a substrate 40 on a side of the pixel defining layer 10 opposite to the display side. A plurality of anodes 21 are located on a side of the second opening 10b close to the substrate 40, and the second opening 10b exposes the anode 21. Moreover, the edge of the anode 21 can extend into and stop at the bottom of the pixel defining layer 10 to be located between the substrate 40 and the pixel defining layer 10, as shown in Figure 1 . In this way, it can help to align the anode 21 and the second opening 10b to increase the effective light-emitting area of the light-emitting device 20. The material of the anode 21 can be a multi-layer composite structure, specifically, a two-layer or three-layer composite structure, etc. In this embodiment, the anode 21 is a composite structure composed of an ITO layer and a metal layer from bottom to top. In this way, the reflectivity of the anode 21 increases, and the brightness of the second display area 102 can be increased.

[0064] The present disclosure provides a display panel. By providing a reflective layer 30 on the sidewall of the second opening 10b of the pixel defining layer 10 located in the second display area 102, the reflectivity of the sidewall of the second opening 10b is increased, so that the light-emitting intensity of the light-emitting device 20 in the second opening 10b of the second display area 102 of the pixel defining layer 10 is increased, thereby solving the problem of brightness difference between the second display area 102 and the first display area 101 of the display panel.

[0065] At least one embodiment of the present disclosure provides a display device. The display device 200 includes an image acquisition device 201 and a display panel 100 as described in the above embodiments. Refer to Figure 8 . The display panel 100 includes a first display area 101 and a second display area 102. The first display area includes first sub-pixels 110, and the second display area includes second sub-pixels 120. The area of the first sub-pixels 110 is larger than the area of the second sub-pixels 120. The image acquisition device 201 is located on the side of the display panel opposite to the display side, and the orthographic projection of the image acquisition device 201 on the plane where the display panel 100 is located at least partially overlaps with the second display area 102 of the display panel 100.

[0066] Specifically, the display device 200 may be an electronic product such as a smart phone, a computer monitor, a game console, and a television. For example, the display device 200 may be a smart phone with a front camera function, and the image acquisition device is the front camera of the mobile phone.

[0067] The present disclosure provides a display device. By providing a reflective layer on the sidewall of the opening in the pixel definition layer of the display panel located in the second display area, the reflectivity of the sidewall of the opening is increased, so that the light emission intensity of the light-emitting device in the opening of the second display area of the pixel definition layer is increased, thereby solving the problem of the brightness difference between the second display area and the first display area of the display panel.

[0068] The display device provided according to the embodiment of the present disclosure and the display panel provided by the embodiment of the present disclosure belong to the same inventive concept and have corresponding film layer structures and beneficial effects. Details not described in detail in the embodiment of the display device can be found in the embodiment part of the display panel and will not be repeated here.

[0069] The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A display panel, characterized in that, Comprising a display area, the display area includes a first display area and a light-transmissive second display area, and the display panel further includes: A plurality of light-emitting devices arranged in the display area; A pixel definition layer located in the display area and provided with a plurality of openings for defining the light-emitting devices; and A plurality of reflection layers respectively disposed on the side walls of the openings in the pixel definition layer located in the second display area; At least one recess is provided on the side wall of the opening in the second display area, and the reflection layer is conformal with the side wall of the opening in the second display area; Wherein, the recess is a strip-shaped groove, and the strip-shaped groove extends in a direction from the display side of the display panel to the side opposite to the display side, And the orthographic projections of the two end points of the strip-shaped groove on the display panel and the center of the opening in the second display area on the display panel are collinear; The reflection layer is an insulating material, the reflection layer covers the side wall of the opening in the second display area and extends to a main surface of the pixel definition layer, and adjacent reflection layers are spaced apart from each other.

2. The display panel according to claim 1, wherein The area of the orthographic projection of the opening located in the first display area on the plane where the display panel is located is larger than the area of the orthographic projection of the opening located in the second display area on the plane where the display panel is located.

3. The display panel according to claim 1, wherein From the display side of the display panel to the side opposite to the display side, the side wall of the opening in the second display area includes a first end and a second end, The orthographic projection of the second end on the plane where the display panel is located is located within the orthographic projection of the first end on the plane where the display panel is located.

4. The display panel according to claim 1, wherein The reflection layer is a semi-transmissive semi-reflective layer or a total reflection layer.

5. The display panel according to claim 4, wherein, The material of the reflection layer includes metal oxide.

6. The display panel according to claim 1, wherein The light-emitting device includes an anode, a common layer, a light-emitting layer, and a cathode stacked in sequence, the plurality of light-emitting devices share the same common layer, and the reflection layer is located between the pixel definition layer and the common layer.

7. The display panel according to claim 6, wherein The common layer includes at least one of a hole injection layer, a hole transport layer, and an electron blocking layer.

8. The display panel according to claim 1, wherein, The recesses are provided in plurality, and the shapes of the recesses are the same as each other; and / or The distances between adjacent recesses are equal.

9. The display panel according to claim 1, wherein, The shape of the cross-section of the strip-shaped groove parallel to the plane where the display panel is located is arc-shaped.

10. A display device, characterized in that, Comprising an image acquisition device and the display panel according to any one of claims 1 to 9, Wherein, the image acquisition device is located on the side of the display panel opposite to the display side, and The orthographic projection of the image acquisition device on the plane where the display panel is located at least partially coincides with the second display area of the display panel.

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