Display panel and display device

Abstract

The application discloses a display panel and a display device, and belongs to the technical field of display. The transmittance of a first display area in the display panel is greater than that of a second display area. In the first display area, a cathode metal layer comprises a plurality of cathode main body parts, and in a direction perpendicular to a plane where a substrate is located, a first light shielding part, an anode, a light emitting unit and the cathode main body parts are mutually overlapped. The first display area comprises a plurality of first signal lines located on a transparent conductive layer, the anode metal layer further comprises a plurality of anode extension lines, the first light shielding layer further comprises a plurality of first light shielding connecting parts, and the cathode metal layer further comprises a plurality of cathode connecting parts. In the direction perpendicular to the plane where the substrate is located, the first light shielding connecting part, the anode extension line and the cathode connecting part are mutually overlapped. The display device comprises the above display panel. The application can not only ensure that the first display area has sufficient transmittance as much as possible, but also reduce the influence of diffraction on imaging effect as much as possible, and ensure the photosensitive effect.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology

[0002] Organic light-emitting diodes (OLEDs) have advantages such as self-illumination, flexible screen design, high luminous efficiency, and fast response time. With the development of display technology, OLED screen designs are pursuing higher screen-to-body ratios and greater integration of electronic components, leading to the gradual development of under-display camera technology with display capabilities.

[0003] Under-display camera (CUP; under-display camera, UDC) technology refers to a technique that reduces the area occupied by the camera by creating a hole in a portion of the display area, thereby increasing the screen-to-body ratio. Under-display camera technology allows ambient light to pass through the screen's film layers to reach the underlying layer and be captured by the camera for imaging. This technology requires the OLED device's film layer material to have high transmittance and a unique circuit design in the display area. Furthermore, display devices using under-display camera technology often exhibit diffraction phenomena, which affect the image quality of the camera. Therefore, diffraction is a key factor restricting the development of under-display camera technology. For example, in some existing designs, the area where the under-display camera is located has a large portion occupied by metal due to the complex pixel circuitry of the OLED, resulting in a very small proportion of the light-transmitting area. This leads to low transmittance and strong diffraction, severely impacting the camera's image quality.

[0004] Therefore, providing a display panel and display device that can not only ensure sufficient transmittance in the area of ​​photosensitive devices such as under-display cameras, but also minimize the impact of diffraction on imaging effects and ensure photosensitive performance is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a display panel and a display device to solve the problems of insufficient transmittance and severe diffraction in the under-display camera area of ​​existing display devices using under-display camera technology.

[0006] This invention discloses a display panel, comprising: a substrate; a first light-shielding layer located on one side of the substrate, the first light-shielding layer including a plurality of first light-shielding portions; an anode metal layer located on the side of the first light-shielding layer away from the substrate, the anode metal layer including a plurality of anodes; a light-emitting functional layer located on the side of the anode metal layer away from the substrate, the light-emitting functional layer including a plurality of light-emitting units; and a cathode metal layer located on the side of the light-emitting functional layer away from the substrate; the display panel includes a first display area and a second display area, the transmittance of the first display area being greater than the transmittance of the second display area; in the first display area, the cathode metal layer includes a plurality of cathode main portions, perpendicular to the substrate. In the planar direction, the first light-shielding part, anode, light-emitting unit, and cathode main body overlap each other; the first display area includes multiple first signal lines, which are located in the transparent conductive layer; the anode metal layer also includes multiple anode extension lines, one end of which is directly connected to the anode, and the other end of which is electrically connected to the first signal line; the first light-shielding layer also includes multiple first light-shielding connecting parts, which are interconnected; the cathode metal layer also includes multiple cathode connecting parts, which are interconnected; in the direction perpendicular to the plane of the substrate, the first light-shielding connecting parts, anode extension lines, and cathode connecting parts overlap each other.

[0007] Based on the same inventive concept, the present invention also discloses a display device, which includes the above-described display panel.

[0008] Compared with the prior art, the display panel and display device provided by the present invention achieve at least the following beneficial effects:

[0009] The display panel provided by this invention features a cathode metal layer in the first display area that is not a full-surface structure. The cathode metal layer within the first display area includes multiple cathode main bodies. By patterning the cathode metal layer in the first display area, the cathode metal structure in areas where non-light-emitting units are located can be removed, thereby increasing the transmittance of the first display area. When the first display area is used as a photosensitive device area, this improves the performance of the photosensitive device. A first light-shielding layer is also included between the substrate and the anode metal layer. This first light-shielding layer includes multiple first light-shielding parts. The first light-shielding parts, anode, light-emitting units, and cathode main bodies overlap. The first light-shielding parts enable the patterning process of the cathode main bodies while minimizing the increase of non-transparent structures in the first display area, thus ensuring high transmittance. This invention also includes multiple transparent first signal lines in the first display area. These first signal lines enable signal transmission between the driving circuit of the driving array layer and the anode of the anode metal layer, further increasing the transmittance of the first display area. Furthermore, the anode metal layer includes multiple anode extension lines, which can be understood as a portion of the structure extending from the anode to extend the distance between the anode's input and output ends. This allows for a larger layout space for the first signal line connected to the anode's output end, which is beneficial for achieving a high-resolution display panel. In this invention, the first light-shielding connection portion, anode extension lines, and cathode connection portion overlap in a direction perpendicular to the substrate plane, while the first light-shielding portion, anode, light-emitting unit, and cathode main body overlap. Even with the anode extension lines added to increase the layout space for the first signal line, the area occupied by non-transparent metal materials of different film layers in the first display area can be minimized. This helps to ensure that the transmittance of the first display area is not reduced as much as possible, while also avoiding additional diffraction in the first display area. When the first display area is used as a photosensitive device area, this improves the performance of the photosensitive device.

[0010] Of course, any product implementing this invention need not necessarily achieve all of the technical effects described above at the same time.

[0011] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0012] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0013] Figure 1 This is a schematic diagram of the planar structure of the display panel provided in an embodiment of the present invention;

[0014] Figure 2 yes Figure 1 A magnified schematic diagram of a portion of the J1 region;

[0015] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure along the A-A' direction;

[0016] Figure 4 This is a schematic diagram of the connection structure between the anode of the light-emitting unit and its corresponding first signal line in the related technology;

[0017] Figure 5 yes Figure 2 A partial structural schematic diagram of the first light-shielding layer and the cathode metal layer;

[0018] Figure 6 yes Figure 2 A magnified schematic diagram of a portion of the J2 region;

[0019] Figure 7 yes Figure 1 Another enlarged schematic diagram of the J1 region;

[0020] Figure 8 yes Figure 7 Schematic diagram of the cross-sectional structure along the B-B' direction;

[0021] Figure 9 yes Figure 1 Another enlarged schematic diagram of the J1 region;

[0022] Figure 10 yes Figure 9 Schematic diagram of the cross-sectional structure along the C-C' direction;

[0023] Figure 11 yes Figure 1 Another enlarged schematic diagram of the J1 region;

[0024] Figure 12 yes Figure 11 Schematic diagram of the cross-sectional structure along the D-D' direction;

[0025] Figure 13 This is a schematic diagram of the planar structure of the display device provided in an embodiment of the present invention. Detailed Implementation

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0029] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0030] Various modifications and variations can be made to this invention without departing from its spirit or scope, as will be apparent to those skilled in the art. Therefore, this invention is intended to cover modifications and variations falling within the scope of the corresponding claims (the claimed technical solutions) and their equivalents. It should be noted that the embodiments provided in this invention can be combined with each other without contradiction.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0032] Please refer to the reference. Figures 1-3 , Figure 1 This is a schematic diagram of the planar structure of the display panel provided in an embodiment of the present invention. Figure 2 yes Figure 1 A magnified schematic diagram of a portion of the J1 region. Figure 3 yes Figure 2 A cross-sectional structural diagram along line A-A' (It should be understood that this diagram is for the purpose of clearly illustrating the structure of this embodiment). Figure 2 The display panel 000 provided in this embodiment includes: (with transparency filled in).

[0033] Substrate 10;

[0034] The first light-shielding layer 20 is located on one side of the substrate 10 and includes a plurality of first light-shielding portions 201.

[0035] The anode metal layer 30 is located on the side of the first light-shielding layer 20 away from the substrate 10, and the anode metal layer 30 includes a plurality of anodes 301;

[0036] The light-emitting functional layer 40 is located on the side of the anode metal layer 30 away from the substrate 10, and the light-emitting functional layer 40 includes a plurality of light-emitting units 401;

[0037] The cathode metal layer 50 is located on the side of the light-emitting functional layer 40 away from the substrate 10.

[0038] The display panel 000 includes a first display area AA1 and a second display area AA2, wherein the transmittance of the first display area AA1 is greater than that of the second display area AA2;

[0039] In the first display area AA1, the cathode metal layer 50 includes a plurality of cathode main bodies 501. In the direction Z perpendicular to the plane of the substrate 10, the first light-shielding part 201, the anode 301, the light-emitting unit 401, and the cathode main body 501 overlap each other.

[0040] The first display area AA1 includes multiple first signal lines 601, which are located in the transparent conductive layer 60; the anode metal layer 30 also includes multiple anode extension lines 302, one end of which is directly connected to the anode 301, and the other end of which is electrically connected to the first signal lines 601.

[0041] The first light-shielding layer 20 also includes a plurality of first light-shielding connecting portions 202, and the plurality of first light-shielding portions 201 are interconnected through the first light-shielding connecting portions 202. The cathode metal layer 50 also includes a plurality of cathode connecting portions 502, and the plurality of cathode main body portions 501 are interconnected through the cathode connecting portions 502.

[0042] In the direction Z perpendicular to the plane of the substrate 10, the first light-shielding connection 202, the anode extension line 302, and the cathode connection 502 overlap each other.

[0043] Specifically, the display panel 000 provided in this embodiment can be an organic light-emitting diode (OLED) display panel. Optionally, the display panel 000 can be a display panel with an under-display camera or other photosensitive device. The display panel 000 includes a first display area AA1 and a second display area AA2, with at least a portion of the second display area AA2 disposed adjacent to the first display area AA1. Figure 1 The second display area AA2 is positioned around the first display area AA1, or the second display area AA2 may partially surround the first display area AA1 (not illustrated in the accompanying drawings). It is understood that this embodiment... Figure 1 This example only uses a circular first display area AA1 as an illustration. In actual implementation, the shape of the first display area AA1 includes, but is not limited to, this, and can also be other shapes. In this embodiment, the transmittance of the first display area AA1 is set to be greater than that of the second display area AA2, that is, the light transmittance of the first display area AA1 is greater than that of the second display area AA2. The first display area AA1 can be used as the setting area for photosensitive devices such as cameras, light sensors, and fingerprint sensors. Both the first display area AA1 and the second display area AA2 can include multiple sub-pixels to display the image to be displayed. This allows the first display area AA1 to perform its display function while also being reused as the setting area for photosensitive devices (such as cameras).

[0044] Optionally, the transmittance of the first display area AA1 is greater than that of the second display area AA2. This can be achieved by setting the PPI (Pixels Per Inch, which represents the number of pixels per inch of the display panel) in the first display area AA1 to be less than that in the second display area AA2, or by having a light-transmitting area that the second display area AA2 does not have. This embodiment does not limit the specific structure of the display panel in the first display area AA1. In specific implementation, it can also be set to other structures that can achieve the light transmittance of the first display area AA1 being greater than that of the second display area AA2.

[0045] When the display panel 000 of this embodiment is working, if the under-display camera or other photosensitive devices within the first display area AA1 are not working, the sub-pixels of different colors within the first display area AA1 and the sub-pixels of different colors within the second display area AA2 work together to enable the second display area AA2 and the first display area AA1 to display the image together, thus achieving a full-screen display effect of the display panel 000. When the under-display camera or other photosensitive devices within the first display area AA1 are working, since the first display area AA1 has a high light transmittance, the under-display camera or other photosensitive devices within the first display area AA1 can receive external light passing through the first display area AA1 to achieve the setting function (such as the camera function). Thus, while realizing the display function of the first display area AA1, increasing the screen ratio, and achieving a full-screen display, it can also provide conditions for the operation of the photosensitive devices with high light transmittance, thereby realizing the setting function of the under-display camera or other photosensitive elements.

[0046] It is understood that in this embodiment Figures 1-3 The display panels illustrated herein are all examples of display panels that use organic light-emitting diode (OLED) display technology and can accommodate photosensitive devices such as under-display cameras. In specific implementations, the display panel provided in this embodiment may also be a transparent display panel using organic light-emitting diode (OLED) display technology, which will not be elaborated upon here.

[0047] The film structure of the display panel 000 in this embodiment includes a substrate 10. The substrate 10 can be either a flexible substrate or a rigid substrate. This embodiment does not limit the substrate 10. The substrate 10 can serve to support other film layers of the panel. One side of the substrate 10 may include an anode metal layer 30, a light-emitting functional layer 40, and a cathode metal layer 50, wherein the light-emitting functional layer 40 is located between the anode metal layer 30 and the cathode metal layer 50. The light-emitting functional layer 40 may be an organic light-emitting material. The anode metal layer 30 includes multiple anodes 301, and the light-emitting functional layer 40 includes multiple light-emitting units 401. One anode 301 may correspond to one light-emitting unit 401. During display, the organic light-emitting material of the light-emitting unit 401 emits light through carrier injection and recombination under the drive of an electric field. The display principle is generally that, under a certain voltage drive, electrons and holes are injected from the cathode metal layer 50 and the anode 301 into the electron and hole transport layers, respectively. The electrons and holes migrate through the electron and hole transport layers to the light-emitting functional layer 40 of the organic light-emitting material, and meet in the organic light-emitting material of each light-emitting unit 401 to form excitons and excite the light-emitting molecules. The latter emit visible light after radiative relaxation.

[0048] Optionally, in this embodiment, a driving array layer 02 may also be included between the anode metal layer 30 and the substrate 10. The driving array layer 02 may include multiple conductive layers and multiple insulating layers. The driving array layer 02 is used to set up driving circuits such as pixel circuits that drive the light-emitting unit 401 to emit light. In this embodiment, the specific structure of the driving array layer 02 will not be described in detail. For details, please refer to the film layer structure of the panel in the related technology. It is only necessary to understand that the driving array layer 02 may include multiple thin-film transistors T (not filled in the figure) and other structures.

[0049] In this embodiment, the display panel 000 includes a first display area AA1 and a second display area AA2. To achieve a higher transmittance in the first display area AA1 than in the second display area AA2, in this embodiment, the cathode metal layer 50 in the first display area AA1 includes multiple cathode body portions 501. That is, the cathode metal layer 50 included in the display panel 000 is not a full-surface structure; at least within the first display area AA1, the cathode metal layer 50 is not a full-surface structure. The cathode metal layer 50 within the first display area AA1 includes multiple cathode body portions 501. In the direction Z perpendicular to the plane of the substrate 10, the anode 301, The light-emitting unit 401 and the cathode main body 501 overlap each other, that is, the anode 301, the light-emitting unit 401 and the cathode main body 501 correspond one-to-one. By patterning the cathode metal layer 50 of the first display area AA1, the cathode metal structure in the area where the non-light-emitting unit 401 is located in the first display area AA1 can be removed. Thus, the transmittance of the first display area AA1 can be increased by reducing the cathode metal coverage area of ​​the first display area AA1. When the first display area AA1 is used as a photosensitive device setting area, it is beneficial to improve the performance of the photosensitive device (such as when the photosensitive device is a camera, it can improve the shooting effect of the camera).

[0050] In this embodiment, a first light-shielding layer 20 is also included between the substrate 10 and the anode metal layer 30. The first light-shielding layer 20 includes a plurality of first light-shielding portions 201. The first light-shielding portions 201, the anode 301, the light-emitting unit 401, and the cathode main body 501 overlap each other. By providing a patterned first light-shielding portion 201 near the substrate 10, the cathode main body 501 with the same pattern as the first light-shielding portion 201 can be patterned by laser process. The first light-shielding portion 201 blocks the laser from the side near the substrate 10. The cathode metal layer 50 in the area not covered by the first light-shielding portion 201 will be vaporized by the laser. The cathode metal layer 50 in the area covered by the first light-shielding portion 201 forms the cathode main body 501. This allows the first light-shielding portion 201 to realize the process of patterning the cathode main body 501, while also avoiding increasing the area of ​​non-transparent structures in the first display area AA1 as much as possible, which is beneficial to ensuring the high transmittance of the first display area AA1.

[0051] like Figure 4 As shown, Figure 4This is a schematic diagram of the connection structure between the anode of the light-emitting unit and its corresponding first signal line in the related technology. When the light-emitting unit 401' emits light, it needs to provide an anode driving voltage signal to the anode 301' corresponding to the light-emitting unit 401' through the driving circuit of the driving array layer. The distance between the input terminal 301A' of the anode 301' (which can be understood as being located on the structure of the anode 301' itself) and the output terminal 301B' (which can be understood as the output terminal of the driving circuit connected to the anode 301') determines how many parallel first signal lines 601' can be laid between two adjacent light-emitting units 401'. Figure 4 The input terminal 301A' and output terminal 301B' of the anode 301' are basically in the same position. Therefore, when the first signal line 601' is electrically connected to the driving circuit of the driving array layer from the output terminal of the anode 301', if the first signal line 601' extends along the horizontal direction in the figure, the arrangement space of multiple first signal lines 601' corresponding to different anodes 301' in the same sub-pixel row is only... Figure 4 The width area where P1' is located results in limited space for the layout of multiple first signal lines 601', which is beneficial for achieving a high-resolution display panel.

[0052] To address the aforementioned issues, this embodiment provides a first display area AA1 comprising multiple first signal lines 601. Each first signal line 601 can be a trace connected to the anode 301 within the first display area AA1. The first signal lines 601 enable signal transmission between the driving circuit of the driving array layer 02 and the anode 301 of the anode metal layer 30. The anode metal layer 30 also includes multiple anode extension lines 302. One end of each anode extension line 302 is directly connected to the anode 301 (the anode extension line 302 and the anode 301 can be an integral structure), and the other end of each anode extension line 302 is electrically connected to the first signal lines 601. The anode extension lines 302 and the first signal lines 601 achieve the electrical connection between the anode 301 and the driving circuit of the driving array layer 02. Since an anode extension line 302 is provided between the input terminal 301A and the output terminal 301B of the anode 301, the anode extension line 302 can be understood as a part of the structure extending from the anode 301, so as to extend the distance between the input terminal 301A and the output terminal 301B of the anode 301. The arrangement space of multiple first signal lines 601 corresponding to different anodes 301 in the same sub-pixel row can be Figure 2 The width area where P1 is located allows for a larger layout space for the first signal line 601 connected to the output terminal 301B of the anode 301, which is beneficial for achieving a high resolution effect of the display panel.

[0053] In this embodiment, the first signal line 601 is located in the transparent conductive layer 60. That is, the first signal line 601 can be a transparent conductive material, such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), AZO (Aluminum Zinc Oxide), or IGO (Indium Gallium Oxide), etc., which are conductive transparent metal oxide materials. In this way, the transmittance of the first display area AA1 can be further increased through the transparent first signal line 601. When the first display area AA1 is used as the photosensitive device setting area, it is beneficial to improve the performance of the photosensitive device.

[0054] When the anode metal layer 30 of the display panel 000 includes multiple anode extension lines 302, the first light-shielding layer 20 also includes multiple first light-shielding connecting portions 202. Multiple first light-shielding portions 201 corresponding to the light-emitting unit 401 and the cathode main body 501 are interconnected through the first light-shielding connecting portions 202 (the first light-shielding portions 201 and the first light-shielding connecting portions 202 can be an integral structure). That is, in the first display area AA1, the multiple first light-shielding portions 201 of the first light-shielding layer 20 are interconnected through the multiple first light-shielding connecting portions 202 to form a mesh-like structure. When the cathode metal layer 50 is patterned using a laser process, the cathode metal layer 50 can not only form the cathode main body 501 corresponding to the first light-shielding portion 201, but also form the cathode connecting portion 502 corresponding to the first light-shielding connecting portion 202. That is, in the first display area AA1, the multiple cathode main bodies 501 of the cathode metal layer 50 are interconnected through the multiple cathode connecting portions 502 to form a mesh-like structure (the cathode main body 501 and the cathode connecting portion 502 can be an integral structure). This embodiment can not only form a pattern of cathode metal layer 50 in the first display area AA1 with a pattern of the first light-shielding layer 20 that matches the shape of the pattern, but also, by setting the first light-shielding connecting part 202, anode extension line 302, and cathode connecting part 502 in a direction perpendicular to the plane of substrate 10, the three parts overlap each other. That is, the first light-shielding connecting part 202 overlaps not only with the cathode connecting part 502, but also the anode extension line 302 of the anode metal layer 30 overlaps with the first light-shielding connecting part 202 of the first light-shielding layer 20. The extension direction of the anode extension line 302 is consistent with the extension direction of the first light-shielding connecting part 202. Even if the anode extension line 302 is set in order to increase the layout space of the first signal line 601, it can avoid the overlap of the first light-shielding connecting part 202 as much as possible. Increasing the area of ​​the non-transparent structure within the first display area AA1 helps to further ensure the high transmittance of the first display area AA1. In this embodiment, the structure is positioned in the direction Z perpendicular to the plane of the substrate 10. The first light-shielding part 201, anode 301, light-emitting unit 401, and cathode main body 501 overlap with each other, and the first light-shielding connecting part 202, anode extension line 302, and cathode connecting part 502 overlap with each other. This can minimize the area occupied by non-transparent metal materials of different film layers in the first display area AA1. This helps to ensure that the transmittance of the first display area AA1 is not reduced as much as possible, while minimizing the additional diffraction of the first display area AA1. When the first display area AA1 is used as the photosensitive device setting area, it helps to improve the performance of the photosensitive device.

[0055] Optional, such as Figure 2As shown, in order to reduce the area of ​​the cathode metal layer 50 in the first display area AA1, in this embodiment, the cathode connecting portions 502 that connect two adjacent cathode main bodies 501 are connected by the shortest path. It can also be understood that the extension direction of the cathode connecting portion 502 is the direction from the geometric center point of one cathode main body 501 to the geometric center point of the adjacent cathode main body 501. When the cathode main body 501 is circular, it can be understood that the extension direction of the cathode connecting portion 502 is the direction from the center of one cathode main body 501 to the center of the adjacent cathode main body 501.

[0056] It is understood that the plurality of light-emitting units 401 in this embodiment may include at least three different colors of light-emitting units 401, which are distinguished by different filling patterns in the figure. It is also understood that the figure in this embodiment uses a circular light-emitting unit 401 as an example for illustration; in specific implementations, the shape of the light-emitting unit 401 includes, but is not limited to, this, and may also be other shapes. It is understood that this embodiment... Figure 2 The multiple light-emitting units 401 in the embodiment may include multiple light-emitting units 401 of different colors. The area size of the light-emitting units 401 of different colors may be the same or different. This embodiment does not limit this. In specific implementation, the settings can be selected according to actual needs.

[0057] Optionally, in this embodiment, the orthographic projection shape of the light-emitting unit 401 of the first display area AA1 onto the plane of the substrate 10 can be circular. In specific implementation, the shape of the light-emitting unit 401 of the first display area AA1 can also be other shapes. For example, the orthographic projection shape of the light-emitting unit 401 of the first display area AA1 onto the plane of the substrate 10 can also be either an ellipse or a chamfered rectangle. This can avoid the shape of the light-emitting unit 401 in the first display area AA1 having right-angled edges as much as possible, and make the pattern in the first display area AA1 as circular as possible, so that the diffraction energy is distributed as evenly as possible in all directions, and the diffraction energy in a single direction is reduced. This can effectively improve the diffraction problem and further enhance the optical effect of the first display area AA1 when used as a photosensitive device setting area.

[0058] Optional, such as Figure 3 As shown, the transparent conductive layer 60 is located on the side of the anode metal layer 50 facing the substrate 10. In this embodiment, the film structure of the display panel 000 is illustrated by taking the transparent conductive layer 60 located between the anode metal layer 30 and the driving array layer 02 as an example. In specific implementation, the transparent conductive layer 60 can also be one of the film layers in the driving array layer 02, as long as the anode 301 and the anode extension line 302 in the anode metal layer 30 can achieve electrical connection with the driving circuit through the first signal line 601 of the transparent conductive material.

[0059] Optionally, the first display area AA1 in this embodiment includes a functional device area, which can be understood as the area where photosensitive devices and other structures are set. When the display panel 000 forms a display module structure, the film layer at the corresponding position of the functional device area of ​​the module below the display panel 000 can be hollowed out to place photosensitive devices and other structures. The functional device area is still used as the first display area AA1, thereby reducing the display area occupied by the photosensitive device and helping to further improve the screen ratio.

[0060] It is understood that the figures in this embodiment are merely illustrative of the structures that the display panel 000 may include. In specific implementations, the structure of the display panel 000 includes, but is not limited to, these structures, and may also include other structures capable of realizing display and light-sensing functions. These will not be elaborated upon here; for details, please refer to the structure of organic light-emitting diode display panels in related technologies for further understanding. It should be noted that this embodiment… Figures 1-3 The structure of the display panel is shown only as an example. In actual implementation, the structure of the display panel 000 includes, but is not limited to, this. It may also include other structures, such as other film layer structures, pixel circuits, encapsulation structures, etc. of the display panel 000. This embodiment will not elaborate on these details. For a more detailed understanding, please refer to the structure of organic light-emitting diode display panels in related technologies.

[0061] Optional, such as Figures 1-3 , Figure 5 As shown, Figure 5 yes Figure 2 A partial structural diagram of the first light-shielding layer and the cathode metal layer (it should be understood that this is for the purpose of clearly illustrating the structure of this embodiment). Figure 5 (Transparency filling is performed in the middle). In this embodiment, the orthographic projection of the first light-shielding part 201 on the plane where the substrate 10 is located coincides with the orthographic projection of the cathode body part 501 on the plane where the substrate 10 is located, and the orthographic projection of the first light-shielding connecting part 202 on the plane where the substrate 10 is located coincides with the orthographic projection of the cathode connecting part 502 on the plane where the substrate 10 is located.

[0062] This embodiment explains that when patterning the cathode metal layer 50 of the first display area AA1, a patterned first light-shielding portion 201 and a first light-shielding connecting portion 202 are provided near the substrate 10. A laser process is used to pattern the cathode main body 501, which has the same pattern as the first light-shielding portion 201, and the cathode connecting portion 502, which has the same pattern as the first light-shielding connecting portion 202. The first light-shielding portion 201 and the first light-shielding connecting portion 202 block the laser light from the side near the substrate 10. The cathode metal layer 50 in the area not covered by the first light-shielding portion 201 and the first light-shielding connecting portion 202 is vaporized by the laser. The cathode metal layer 50 in the area covered by the first light-shielding portion 201 forms the cathode main body 501. The cathode metal layer 50 in the area covered by the first light-shielding connecting part 202 forms a cathode connecting part 502. This allows the orthographic projection of the first light-shielding part 201 onto the plane of the substrate 10 to coincide with the orthographic projection of the cathode body 501 onto the plane of the substrate 10. Similarly, the orthographic projection of the first light-shielding connecting part 202 onto the plane of the substrate 10 to coincide with the orthographic projection of the cathode connecting part 502 onto the plane of the substrate 10. The first light-shielding part 201 and the first light-shielding connecting part 202 can achieve the patterning process of the cathode metal layer 50 in the first display area AA1. At the same time, by forming two completely overlapping non-transparent structures of different layers, the area of ​​non-transparent structures in the first display area AA1 can be avoided, which is conducive to better ensuring the high transmittance of the first display area AA1.

[0063] Optional, such as Figure 1 and Figure 2 As shown, in this embodiment, the first signal line 601 includes a first sub-segment 601A, and the end of the anode extension line 302 away from the anode 301 is electrically connected to one end of the first sub-segment 601A.

[0064] The extension direction of the first segment 601A intersects the extension direction of the anode extension line 302.

[0065] This embodiment explains that the display panel 000 needs to be equipped with a first signal line 601 electrically connected to the anode 301 in the first display area AA1. The first signal line 601 enables signal transmission between the driving circuit of the driving array layer 02 and the anode 301 of the anode metal layer 30. When the anode metal layer 30 also includes multiple anode extension lines 302, one end of each extension line 302 is directly and integrally connected to the anode 301. The anode extension line 302 can be understood as a portion of the structure extending from the anode 301, thereby increasing the distance between the input end 301A and the output end 301B of the anode 301. This allows for a larger arrangement space for the multiple first signal lines 601 electrically connected to multiple anodes 301 in the same sub-pixel row. Furthermore, the extension direction of some segments (such as the first sub-segment 601A) of the first signal line 601 can intersect or be perpendicular to the extension direction of the anode extension line 302. Figure 2 As shown, the end of the anode extension line 302 away from the anode 301 is electrically connected to one end of the first sub-segment 601A. The first sub-segment 601A of the first signal line 601 extends along the first direction X, and the anode extension line 302 extends along the second direction Y. The longer the length of the anode extension line 302 in the second direction Y, the greater the width space for laying the first signal line 601 in the second direction Y. In this embodiment, an anode extension line 302 is provided between the input end 301A and the output end 301B of the anode 301. The laying space for multiple first signal lines 601 corresponding to different anodes 301 in the same sub-pixel row can be further increased in the second direction Y, thereby allowing the first signal line 601 connected to the output end 301B of the anode 301 to have a larger laying space, achieving a high resolution effect for the display panel.

[0066] It is understood that the figures in this embodiment are only used as an example to illustrate the extension of the first segment 601A of the first signal line 601 along the first direction X and the extension of the anode extension line 302 along the second direction Y. In specific implementation, the first segment 601A of the first signal line 601 can also extend along the second direction Y and the extension of the anode extension line 302 can extend along the first direction X. It is only necessary to satisfy that the extension direction of the first segment 601A intersects or is perpendicular to the extension direction of the anode extension line 302. This embodiment does not limit this.

[0067] Optional, such as Figures 1-3 and Figure 6 As shown, Figure 6 yes Figure 2 A partially enlarged structural diagram of region J2 (It should be understood that this diagram is for the purpose of clearly illustrating the structure of this embodiment). Figure 6 (Transparency filling was performed in the middle). In this embodiment, the anode extension line 302 is electrically connected to the first signal line 601 through the via K1.

[0068] The orthographic projection of the first light-shielding connection 202 onto the plane of the substrate 10 covers the orthographic projection of the via K1 onto the plane of the substrate 10.

[0069] This embodiment explains that when the anode extension line 302 of the anode metal layer 30 and the first signal line 601 of the transparent conductive layer 60 are electrically connected, the anode extension line 302 is electrically connected to the first signal line 601 through at least one via K1. The via K1 can serve as a transition hole for electrical connection between different conductive layers. Optionally, the via K1 is formed in at least one insulating layer between the anode metal layer 30 and the transparent conductive layer 60. In this embodiment, the orthographic projection of the first light-shielding connection portion 202 of the first light-shielding layer 20 onto the plane of the substrate 10 covers the orthographic projection of the via K1 onto the plane of the substrate 10. This ensures that in the direction Z perpendicular to the plane of the substrate 10, the first light-shielding connection portion 202 not only overlaps with the anode extension line 302, but its width is also sufficient to cover the width of the via K1. This helps to prevent the via K1 and the anode extension line 302 from being exposed during the patterning of the cathode metal layer 50, thus avoiding the influence of laser on both and improving the electrical connection stability between the anode extension line 302 and the first signal line 601.

[0070] In some alternative embodiments, please refer to the references. Figure 1 , Figure 7 and Figure 8 , Figure 7 yes Figure 1 Another enlarged schematic diagram of the J1 region. Figure 8 yes Figure 7 A cross-sectional structural diagram along the B-B' direction (it should be understood that this diagram is for the purpose of clearly illustrating the structure of this embodiment). Figure 7 (Transparency filling is performed in the middle). In this embodiment, the display panel 000 also includes a second light-shielding layer 70, which is located on the side of the cathode metal layer 50 away from the substrate 10.

[0071] The second light-shielding layer 70 includes a second light-shielding portion 701, which overlaps with the cathode connection portion 502 in a direction perpendicular to the plane of the substrate 10.

[0072] This embodiment explains that the film structure of the display panel 000 also includes a second light-shielding layer 70. The second light-shielding layer 70 is located on the side of the cathode metal layer 50 away from the substrate 10. Optionally, the second light-shielding layer 70 can be made of an insulating material with light-shielding effect, such as a black matrix material, etc., which is not limited in this embodiment. In this embodiment, the second light-shielding layer 70 includes at least a second light-shielding portion 701, and in the direction perpendicular to the plane of the substrate 10, the second light-shielding portion 701 overlaps with the cathode connection portion 502. That is, the second light-shielding layer 70 overlaps with the cathode connection portion 502 at least in the area where the cathode connection portion 502 is located in the direction perpendicular to the plane of the substrate 10. Through the second light-shielding portion 701 with light-shielding function, the reflectivity of the cathode metal layer 50 can be reduced, thereby improving the diffraction problem of the panel. In this embodiment, the cathode metal layer 50 of the first display area AA1 is patterned to improve transmittance. The patterned cathode metal layer 50 has cathode connection portions 502 connecting the cathode main body portions 501 to each other in the area outside the light-emitting unit 401. Therefore, in order to reduce the metal reflection problem of the cathode connection portion 502, this embodiment provides a second light-shielding portion 701 with a light-shielding function that overlaps with the cathode connection portion 502 in a direction perpendicular to the plane of the substrate 10. Thus, the metal reflectivity of the cathode connection portion 502 can be reduced by the blocking of the second light-shielding portion 701, and the diffraction problem can be improved. Furthermore, the overlap of the second light-shielding portion 701 with the cathode connection portion 502 in a direction perpendicular to the plane of the substrate 10 can avoid increasing the area of ​​the non-transparent structure in the first display area AA1 by using two non-transparent structures of different layers that overlap as much as possible. This avoids reducing the transmittance of the first display area AA1 by setting the second light-shielding portion 701 as much as possible, and also avoids adding additional diffraction problems as much as possible, which is beneficial to ensuring display quality.

[0073] Optional, such as Figure 1 , Figure 9 and Figure 10 As shown, Figure 9 yes Figure 1 Another enlarged schematic diagram of the J1 region. Figure 10 yes Figure 9 A cross-sectional view of the structure along the C-C' direction (it should be understood that this is a simplified diagram to clearly illustrate the structure of this embodiment). Figure 9(Transparency filling is performed). In this embodiment, the orthographic projection of the second light-shielding part 701 onto the plane of the substrate 10 coincides with the orthographic projection of the cathode connection part 502 onto the plane of the substrate 10. Optionally, the orthographic projections of the second light-shielding part 701, the cathode connection part 502, and the first light-shielding connection part 202 onto the plane of the substrate 10 coincide, meaning their linewidths are basically the same. In this embodiment, the orthographic projection pattern of the second light-shielding part 701 onto the plane of the substrate 10 and the orthographic projection pattern of the cathode connection part 502 onto the plane of the substrate 10 are set to coincide as completely as possible. This allows for the formation of two completely overlapping, non-transparent structures of different layers, which better avoids increasing the area of ​​the non-transparent structure within the first display area AA1. This helps to better ensure the high transmittance of the first display area AA1 and avoids additional diffraction problems caused by increasing the area of ​​the non-transparent metal, thus better ensuring display quality.

[0074] Optional, such as Figure 1 , Figure 11 and Figure 12 As shown, Figure 11 yes Figure 1 Another enlarged schematic diagram of the J1 region. Figure 12 yes Figure 11 A cross-sectional structural diagram along the D-D' direction (it should be understood that this diagram is for the purpose of clearly illustrating the structure of this embodiment). Figure 11 (Transparency filling is performed in the middle). In this embodiment, the second light-shielding layer 70 may further include a plurality of third light-shielding portions 702. The orthographic projection of the third light-shielding portions 702 on the plane where the substrate 10 is located is arranged around the orthographic projection of the light-emitting unit 401 on the plane where the substrate 10 is located. In this embodiment, the second light-shielding layer 70 also includes third light-shielding portions 702 corresponding to the light-emitting unit 401. The third light-shielding portions 702 can be arranged in a ring structure around the light-emitting unit 401. The third light-shielding portions 702 are used to block the light between different light-emitting units 401, so as to avoid light crosstalk between different light-emitting units 401, which is beneficial to ensuring display quality.

[0075] Further optional, such as Figure 11 and Figure 12 As shown, the third light-shielding part 702 and the second light-shielding part 701 of the second light-shielding layer 70 can be an integrally connected structure, that is, the third light-shielding part 702 and the second light-shielding part 701 can be manufactured by the same process, which is beneficial to reduce process steps and improve process efficiency.

[0076] It should be noted that the figures in this embodiment are merely illustrative depictions of the film structure of the display panel 000. In specific implementations, the film structure of the display panel 000 may also include other film layers, such as a thin film encapsulation layer located between the second light-shielding layer 70 and the cathode metal layer 50, and a color conversion layer on the side of the thin film encapsulation layer away from the substrate 10. These will not be elaborated upon in this embodiment. For details, please refer to the film structure of organic light-emitting diode display panels in related technologies for understanding.

[0077] In some alternative embodiments, please continue to refer to the references. Figures 1-3 In this embodiment, the display panel 000 includes a driving array layer 02, which is located on the side of the transparent conductive layer 60 facing the substrate 10, and the driving array layer 02 includes a plurality of thin film transistors T.

[0078] The first light-shielding layer 20 is located between the driving array layer 02 and the substrate 10.

[0079] This embodiment explains that the film structure of the display panel 000 may also include a driving array layer 02. The driving array layer 02 is located on the side of the transparent conductive layer 60 facing the substrate 10. The driving array layer 02 includes a plurality of thin film transistors T. The plurality of electrically connected thin film transistors T can serve as the driving circuit of the driving array layer 02. The driving circuit is used to transmit driving electrical signals to the light-emitting unit 401 to realize the light-emitting effect of the light-emitting unit 401. In this embodiment, the first light-shielding layer 20 is located between the driving array layer 02 and the substrate 10. That is, the first light-shielding layer 20 is the film layer closest to the substrate 10 and the bottom of the panel. It can block the laser from the bottom when the cathode metal layer 50 is patterned. The cathode metal layer 50 in the area not covered by the first light-shielding part 201 will be vaporized by the laser, while the cathode metal layer 50 in the area covered by the first light-shielding part 201 forms the cathode body part 501. This allows the first light-shielding part 201 to realize the process of patterning the cathode body part 501, while also making the cathode body part 501 and the first light-shielding part 201 have the same pattern. This avoids increasing the area of ​​non-transparent structures in the first display area AA1 as much as possible, which is beneficial to ensuring the high transmittance of the first display area AA1.

[0080] Optionally, the first light-shielding layer 20 may be made of metal. The first light-shielding layer 20 made of metal is opaque and can effectively block the laser from the side near the substrate 10 during the laser process, thereby ensuring the patterning effect of the cathode metal layer 50.

[0081] In some alternative embodiments, please refer to Figure 13 , Figure 13 This is a schematic diagram of the planar structure of the display device provided in the embodiment of the present invention. The display device 111 provided by the present invention includes the display panel 000 provided in the above embodiment of the present invention. Figure 13 The embodiments use a mobile phone as an example to illustrate the display device 111. It is understood that the display device 111 provided in the embodiments of the present invention can be other display devices 111 with display functions, such as computers, televisions, and in-vehicle display devices. The present invention does not impose specific limitations on these. The display device 111 provided in the embodiments of the present invention has the beneficial effects of the display panel 000 provided in the embodiments of the present invention. For details, please refer to the specific descriptions of the display panel 000 in the above embodiments. The present invention will not repeat them here.

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

[0083] The display panel provided by this invention features a cathode metal layer in the first display area that is not a full-surface structure. The cathode metal layer within the first display area includes multiple cathode main bodies. By patterning the cathode metal layer in the first display area, the cathode metal structure in areas where non-light-emitting units are located can be removed, thereby increasing the transmittance of the first display area. When the first display area is used as a photosensitive device area, this improves the performance of the photosensitive device. A first light-shielding layer is also included between the substrate and the anode metal layer. This first light-shielding layer includes multiple first light-shielding parts. The first light-shielding parts, anode, light-emitting units, and cathode main bodies overlap. The first light-shielding parts enable the patterning process of the cathode main bodies while minimizing the increase of non-transparent structures in the first display area, thus ensuring high transmittance. This invention also includes multiple transparent first signal lines in the first display area. These first signal lines enable signal transmission between the driving circuit of the driving array layer and the anode of the anode metal layer, further increasing the transmittance of the first display area. Furthermore, the anode metal layer includes multiple anode extension lines, which can be understood as a portion of the structure extending from the anode to extend the distance between the anode's input and output ends. This allows for a larger layout space for the first signal line connected to the anode's output end, which is beneficial for achieving a high-resolution display panel. In this invention, the first light-shielding connection portion, anode extension lines, and cathode connection portion overlap in a direction perpendicular to the substrate plane, while the first light-shielding portion, anode, light-emitting unit, and cathode main body overlap. Even with the anode extension lines added to increase the layout space for the first signal line, the area occupied by non-transparent metal materials of different film layers in the first display area can be minimized. This helps to ensure that the transmittance of the first display area is not reduced as much as possible, while also avoiding additional diffraction in the first display area. When the first display area is used as a photosensitive device area, this improves the performance of the photosensitive device.

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

Claims

1. A display panel, characterized in that, include: Substrate; A first light-shielding layer is located on one side of the substrate, and the first light-shielding layer includes a plurality of first light-shielding portions; An anode metal layer is located on the side of the first light-shielding layer away from the substrate, and the anode metal layer includes a plurality of anodes; A light-emitting functional layer is located on the side of the anode metal layer away from the substrate, and the light-emitting functional layer includes a plurality of light-emitting units; A cathode metal layer, wherein the cathode metal layer is located on the side of the light-emitting functional layer away from the substrate; The display panel includes a first display area and a second display area, wherein the transmittance of the first display area is greater than that of the second display area; In the first display area, the cathode metal layer includes multiple cathode main bodies, and in a direction perpendicular to the plane of the substrate, the first light-shielding part, the anode, the light-emitting unit, and the cathode main bodies overlap each other; The first display area includes multiple first signal lines, which are located in the transparent conductive layer; the anode metal layer also includes multiple anode extension lines, one end of which is directly connected to the anode, and the other end of which is electrically connected to the first signal lines. The first light-shielding layer further includes a plurality of first light-shielding connecting parts, and the plurality of first light-shielding parts are interconnected through the first light-shielding connecting parts; the cathode metal layer further includes a plurality of cathode connecting parts, and the plurality of cathode main bodies are interconnected through the cathode connecting parts. In a direction perpendicular to the plane of the substrate, the first light-shielding connection, the anode extension line, and the cathode connection overlap each other.

2. The display panel according to claim 1, characterized in that, The first signal line includes a first sub-segment, and the end of the anode extension line away from the anode is electrically connected to one end of the first sub-segment; The extension direction of the first sub-segment intersects the extension direction of the anode extension line.

3. The display panel according to claim 1, characterized in that, The orthographic projection of the first light-shielding part onto the plane of the substrate coincides with the orthographic projection of the cathode body onto the plane of the substrate, and the orthographic projection of the first light-shielding connecting part onto the plane of the substrate coincides with the orthographic projection of the cathode connecting part onto the plane of the substrate.

4. The display panel according to claim 1, characterized in that, The anode extension line is electrically connected to the first signal line through a via; The orthographic projection of the first light-shielding connection portion onto the plane of the substrate covers the orthographic projection of the via onto the plane of the substrate.

5. The display panel according to claim 1, characterized in that, The display panel further includes a second light-shielding layer, which is located on the side of the cathode metal layer away from the substrate; The second light-shielding layer includes a second light-shielding portion, which overlaps with the cathode connection portion in a direction perpendicular to the plane of the substrate.

6. The display panel according to claim 5, characterized in that, The orthographic projection of the second light-shielding part onto the plane of the substrate coincides with the orthographic projection of the cathode connection part onto the plane of the substrate.

7. The display panel according to claim 1, characterized in that, The transparent conductive layer is located on the side of the anode metal layer facing the substrate.

8. The display panel according to claim 7, characterized in that, The display panel includes a driving array layer located on the side of the transparent conductive layer facing the substrate, and the driving array layer includes a plurality of thin-film transistors; The first light-shielding layer is located between the driving array layer and the substrate.

9. The display panel according to claim 1, characterized in that, The first light-shielding layer is made of metal materials.

10. The display panel according to claim 1, characterized in that, The first display area includes a functional device area.

11. A display device, characterized in that, Includes the display panel as described in any one of claims 1-10.

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