Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a substrate, a circuit layer, a flat layer, an anode layer and a first pixel definition layer. The anode layer comprises a plurality of anodes and is connected with the pixel driving circuit of the circuit layer through anode contact holes, the anodes comprise a plurality of anode columns arranged in the first direction, each anode column comprises a plurality of anode sets arranged in the second direction, and each anode set comprises two anodes arranged in the second direction. The first pixel definition layer comprises a plurality of first extension sections and a plurality of second extension sections which are arranged along a second direction; in the overlook view, in the anode array, the first extension section covers a first gap between two adjacent anodes of two adjacent anode groups, and the second extension section covers a second gap between two anodes of the anode groups and two anode contact holes corresponding to the two anodes, so that the shielding reliability of the anode contact holes is improved; meanwhile, the size of the first extension section in the second direction is reduced, so that the aperture opening ratio of the pixel is improved.

Description

Technical Field

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

[0002] In recent years, with the continuous development of organic light-emitting diode (OLED) display technology, end products have placed higher demands on panel display accuracy, brightness uniformity, and luminous efficiency, driving the continuous optimization of pixel structures and electrode wiring schemes. In OLED display panels, the light-emitting area is typically divided by horizontally and vertically extending isolation structures to define multiple sub-pixel areas. Anode electrodes and anode contact holes are then provided within each sub-pixel to achieve effective electrical connection and drive the organic light-emitting layer to emit light.

[0003] In existing technology, the anode contact hole is typically located below the anode layer to achieve electrical connection to the anode. As the pixel density of display panels continues to increase, the width of the pixel definition layer often needs to be reduced to increase the aperture ratio of sub-pixels and expand the effective light-emitting area. However, when the width of the pixel definition layer is reduced, the anode contact hole is located closer to the boundary between the isolation structure and the light-emitting area, resulting in a weakened shielding effect of the pixel definition layer on the anode contact hole. This risks exposing the anode contact hole, leading to problems such as poor electrode connection, light leakage, or uneven light emission. Summary of the Invention

[0004] Embodiments of the present application provide a display panel and a display device for enhancing the shielding effect and connection reliability of an anode contact hole, while increasing the pixel aperture ratio to improve the luminous efficiency and image uniformity of the display panel.

[0005] To achieve the above functions, the technical solutions provided in the embodiments of the present application are as follows:

[0006] An embodiment of the present application provides a display panel, comprising:

[0007] substrate;

[0008] a circuit layer, located on the substrate, comprising a plurality of pixel driving circuits;

[0009] a planar layer, located on the circuit layer and provided with a plurality of anode contact holes;

[0010] an anode layer, disposed on the planar layer and comprising a plurality of anodes, wherein the anodes are connected to the pixel driving circuit through the anode contact holes, wherein the plurality of anodes comprise a plurality of anode columns arranged along a first direction, each of the anode columns comprises a plurality of anode groups arranged along a second direction, each of the anode groups comprises two anodes arranged along the second direction, and the second direction intersects the first direction; and

[0011] A first pixel definition layer is provided on the anode layer and includes a plurality of first extension segments and a plurality of second extension segments arranged along the second direction;

[0012] In which, from a top-down perspective, in the anode column, the first extension section covers the first gap between two adjacent anodes of two adjacent anode groups, the second extension section covers the second gap between the two anodes of the anode group and the two anode contact holes corresponding to the two anodes, and the size of the second extension section along the second direction is larger than the size of the first extension section along the second direction.

[0013] Optionally, in one embodiment, the plurality of first extension segments and the plurality of second extension segments are alternately arranged in the second direction;

[0014] The size of the second extension segment along the second direction is greater than 1.8 microns, and the size of the first extension segment along the second direction is less than 1.4 microns.

[0015] Optionally, in one embodiment, the anode includes a main portion and an auxiliary portion that are connected to each other, and the auxiliary portion is electrically connected to the pixel driving circuit through the anode contact hole; wherein, in the same anode group, the auxiliary portion of each anode is connected to the side of the main portion close to the other anode in the second direction.

[0016] Optionally, in one embodiment, the first gap is located between two adjacent main bodies of two adjacent anode groups, and / or the first gap is linear in the top view.

[0017] Optionally, in one embodiment, in a top view, the first extension section also covers a portion of two adjacent main bodies of two adjacent anode groups; and / or,

[0018] In a top view, the first extension section is spaced apart from two anode contact holes corresponding to two adjacent anodes of two adjacent anode groups.

[0019] Optionally, in one embodiment, in a top view, in the same anode group, the second gap includes a first spacing segment, a second spacing segment, and a third spacing segment connected in sequence;

[0020] In which, the first spacing segment is located between the main part of one of the anodes and the auxiliary part of the other anode, the second spacing segment is located between the auxiliary part of one of the anodes and the auxiliary part of the other anode, and the third spacing segment is located between the auxiliary part of one of the anodes and the main part of the other anode; and / or the second gap is in the shape of a broken line when viewed from above.

[0021] Optionally, in one embodiment, in a top view, the second extension section also covers the two auxiliary portions of the anode group and a portion of the two main portions of the anode group.

[0022] Optionally, in one embodiment, a first overlapping area is formed between the first extension section and two adjacent anodes of two adjacent anode groups, and a second overlapping area is formed between the second extension section and two anodes of the anode group; wherein the first overlapping area is smaller than the second overlapping area.

[0023] Optionally, in one embodiment, the display panel further comprises a second pixel definition layer, the second pixel definition layer being disposed on a side of the first pixel definition layer away from the anode layer, the second pixel definition layer comprising a plurality of third extension segments spaced apart along the first direction;

[0024] In a top view, the third extension section covers a third gap between two adjacent anodes of two adjacent anode columns, and a dimension of the third extension section along the first direction is smaller than a dimension of the second extension section along the second direction.

[0025] An embodiment of the present application provides a display device, which includes any of the display panels described above.

[0026] Beneficial effects of the embodiments of the present application: The embodiments of the present application provide a display panel and a display device, which display panel includes a substrate, a circuit layer, a flat layer, an anode layer and a first pixel definition layer; the circuit layer includes multiple pixel driving circuits; the flat layer is provided with multiple anode contact holes; the anode layer includes multiple anodes, and is connected to the pixel driving circuit through the anode contact holes, the multiple anodes include multiple anode columns arranged along the first direction, each anode column includes multiple anode groups arranged along the second direction, and each anode group includes two anodes arranged along the second direction; the first pixel definition layer includes multiple first extension segments and multiple second extension segments arranged along the second direction; from a top view, in the anode column, the first extension segment covers the first gap between adjacent two anodes of two adjacent anode groups, the second extension segment covers the second gap between the two anodes of the anode group and the two anode contact holes corresponding to the two anodes, thereby improving the shielding reliability and electrical connection stability of the anode contact holes, while reducing the size of the first extension segment along the second direction, so that the pixel opening is increased to improve the aperture ratio of the pixel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0028] Figure 1 A schematic plan view of a display panel provided in an embodiment of the present application;

[0029] Figure 2 Provided in the embodiments of this application Figure 1 Schematic diagram of the cross-sectional structure at AA';

[0030] Figure 3 A schematic diagram of a partial top view of the display panel provided in an embodiment of the present application;

[0031] Figure 4 Provided in the embodiments of this application Figure 3 A magnified schematic diagram of point B in the middle;

[0032] Figure 5 A schematic diagram of a partial top view of the structure of an existing display panel;

[0033] Figure 6 This is a schematic diagram of the structure of a display device provided in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 1-display panel; 11-substrate; 111-first substrate; 112-first shielding layer; 113-second substrate; 114-second shielding layer; 12-circuit layer; 120-pixel driving circuit; 121-buffer layer; 122-active layer; 123-first gate insulating layer; 124-first gate; 125-second gate insulating layer; 126-second gate; 127-interlayer insulating layer; 128-source-drain electrode layer; 1281-source electrode; 1282-drain electrode; 13-planarization layer; 131-first planarization layer; 1311-anode contact hole; 132-second planarization layer; 1321-first via hole; 14-first pixel definition layer ;14A-pixel extension section;140-pixel opening;141-first extension section;142-second extension section;15-second pixel definition layer;151-third extension section;16-light-emitting device layer;161-anode layer;1611-anode;1611A-anode column;1611B anode group;1611C-main body;1611D-auxiliary part;171-first gap;172-second gap;172A-first spacing section;172B-second spacing section;172C-third spacing section;173-third gap;162-light-emitting layer;163-cathode layer;18-bridging wire;2-display device;21-middle frame. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the actual use or working mode of the device, specifically the direction of the drawings in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only, and features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed or detachable connections; mechanical or electrical connections; or communication between them; direct or indirect connections through an intermediate medium; and can refer to internal connectivity between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0039] The disclosure below provides many different embodiments for realizing the different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the present application. In addition, the examples of various specific processes and materials provided in the present application, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0040] Please combine Figure 1 、 Figure 2 、 Figure 3 and Figure 4 ;in, Figure 1 A schematic plan view of a display panel provided in an embodiment of the present application; Figure 2 The embodiments of this application provide Figure 1 Schematic diagram of the cross-sectional structure at AA'; Figure 3 A schematic diagram of a partial top view of the display panel provided in an embodiment of the present application; Figure 4 The embodiments of this application provide Figure 3 An enlarged schematic diagram of point B in the figure; wherein, the "top view" refers to the user observing the display panel structure from top to bottom in a direction perpendicular to the plane where the substrate is located.

[0041] This embodiment provides a display panel 1, which includes but is not limited to an organic light-emitting diode (OLED) display panel; the display panel 1 includes a substrate 11, a circuit layer 12, a flat layer 13, a first pixel definition layer 14 and a light-emitting device layer 16.

[0042] The base 11 may include a first substrate 111, a first shielding layer 112, a second substrate 113 and a second shielding layer 114 arranged in a stacked manner. The first substrate 111 and the second substrate 113 are both rigid substrates or flexible substrates, and the specific type can be flexibly selected according to the product structure and application scenario; wherein, when the first substrate 111 and the second substrate 113 are both rigid substrates, their materials may be metals or glass and other materials with excellent mechanical strength and thermal stability; when the first substrate 111 and the second substrate 113 are both flexible substrates, their materials may include at least one of acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, polyurethane-based resin, cellulose resin, silicone resin, polyimide-based resin, and polyamide-based resin to meet the requirements of flexible devices for bendability and mechanical flexibility.

[0043] The circuit layer 12 is located on the substrate, and the circuit layer 12 includes a buffer layer 121 provided on the second shielding layer 114, an active layer 122 provided on the buffer layer 121, a first gate insulating layer 123 provided on the active layer 122, a first gate 124 provided on the first gate insulating layer 123, a second gate insulating layer 125 provided on the first gate 124, a second gate 126 provided on the second gate insulating layer 125, an interlayer insulating layer 127 provided on the second gate 126, and a source-drain electrode layer 128 provided on the interlayer insulating layer 127, wherein the source-drain electrode layer 128 includes a source 1281 and a drain 1282 arranged at intervals.

[0044] Furthermore, the circuit layer 12 also includes a plurality of pixel driving circuits 120 arranged on the substrate 11, and the pixel driving circuit 120 includes at least one thin film transistor, and the thin film transistor can be an etch barrier type, a back channel etch type, or divided into a bottom gate thin film transistor, a top gate thin film transistor and other structures according to the position of the gate and the active layer 122, or divided into an N-type thin film transistor and / or a P-type thin film transistor according to the performance of the thin film transistor.

[0045] Specifically, the thin film transistor includes the active layer 122, the first gate 124, the second gate 126, the source 1281 and the drain 1282; the flat layer 13 is located on the circuit layer 12, and the flat layer 13 includes a first flat layer 131 and a second flat layer 132 arranged in a stacked manner, and the first flat layer 131 is provided with a plurality of anode contact holes 1311; the light-emitting device layer 16 is located on the second flat layer 132; wherein, the display panel 1 also includes a plurality of strapping wires 18 arranged between the first flat layer 131 and the second flat layer 132, one strapping wire 18 is arranged corresponding to one anode contact hole 1311, and the strapping wire 18 is strapped with the drain 1282 through the anode contact hole 1311, for connecting the drain 1282 with the light-emitting device layer 16, thereby realizing the transmission of the display control signal.

[0046] The pixel definition layer is disposed on a side of the planar layer 13 away from the circuit layer 12 and is used to define the light-emitting area of ​​each pixel. The pixel definition layer includes a pixel opening 140 region and a non-opening region. The non-opening region can be disposed on at least one side of each pixel opening 140 region, for example, between two adjacent pixel openings 140 regions. The non-opening region can form a closed or semi-closed boundary structure around the pixel openings 140 regions, thereby defining the light-emitting area in a planar direction, preventing lateral diffusion of the light-emitting pixels, and improving the clarity of the pixel light-emitting boundary and display contrast.

[0047] Furthermore, the pixel definition layer is provided with a plurality of pixel openings 140, and the pixel openings 140 are arranged in a pixel opening 140 area of ​​the pixel definition layer. The pixel opening 140 area corresponding to the pixel opening 140 can be a luminous pixel area of ​​the display panel 1. By respectively arranging luminous functional structures with different luminous colors in different pixel openings 140, such as red, green and blue luminous units, a full-color image display effect can be achieved.

[0048] The light-emitting device layer 16 includes an anode layer 161, a light-emitting layer 162, and a cathode layer 163 that are stacked. The anode layer 161 is arranged between the second flat layer 132 and the pixel definition layer. The anode layer 161 includes a plurality of anodes 1611, one anode 1611 is arranged corresponding to one pixel opening 140, and at least part of the surface of the anode 1611 is exposed in the pixel opening 140 to facilitate the subsequent deposition of the light-emitting layer 162 and the formation of electrical contact; wherein, the second flat layer 132 is provided with a plurality of first via holes 1321, one anode 1611 is arranged corresponding to one first via hole 1321, and is connected to the cathode layer 163 through the first via hole 1321. The jumper wire 18 below the second flat layer 132 is electrically connected to achieve layer-by-layer electrical connection from the circuit layer 12 to the anode 1611; the light-emitting layer 162 is arranged on the pixel definition layer, and the light-emitting layer 162 includes a plurality of light-emitting parts, one of the light-emitting parts is located in the pixel opening 140, and is electrically connected to the pixel driving circuit 120 through the anode 1611, the first via 1321, the jumper wire 18, and the anode contact hole 1311 in sequence to achieve independent driving and light-emitting control of each light-emitting part; the cathode layer 163 is arranged on the side of the light-emitting layer 162 away from the anode layer 161, and the cathode layer 163 can be set continuously as an entire layer.

[0049] Specifically, the plurality of anodes 1611 can be arranged in a predetermined manner within the anode layer 161 to form an array structure. The plurality of anodes 1611 include a plurality of anode columns 1611A arranged along a first direction X. Each anode column 1611A includes a plurality of anode groups 1611B arranged along a second direction Y. Each anode group 1611B includes two anodes 1611 arranged along the second direction Y, where the second direction Y intersects the first direction X. For example, the second direction Y and the first direction X can be perpendicular to each other or intersecting at a certain angle to form a two-dimensional coordinate system parallel to the surface of the substrate 11, thereby achieving high-density pixel arrangement and refined pattern design.

[0050] At the same time, in the top-down perspective, in the anode column 1611A, the first extension section 141 covers the first gap 171 between the two adjacent anodes 1611 of the two adjacent anode groups 1611B, and the second extension section 142 covers the second gap 172 between the two anodes 1611 of the anode group 1611B and the two anode contact holes 1311 corresponding to the two anodes 1611, so that the anode contact holes 1311 are shielded by the second extension section 142, thereby improving the shielding reliability of the anode contact holes 1311 and avoiding problems such as poor connection, light leakage or uneven luminescence of the display panel 1 due to the exposure of the anode contact holes 1311; wherein, the "top-down perspective" refers to the observation direction being basically parallel to the normal direction of the surface of the substrate 11, that is, the perspective of observing vertically downward from directly above the display panel 1.

[0051] In addition, the size of the second extension section 142 along the second direction Y is larger than the size of the first extension section 141 along the second direction Y; since the second extension section 142 covers the second gap 172 between the two anodes 1611 of the anode group 1611B and the two anode contact holes 1311 corresponding to the two anodes 1611, that is, the second extension section 142 is used to shield the anode contact holes 1311, so the second extension section 142 needs to have a sufficient coverage area to ensure reliable shielding of the anode contact holes 1311, and the first extension section 141 covers the first gap 171 between the adjacent two anodes 1611 of the two adjacent anode groups 1611B, that is, the first extension section 141 is arranged at the first gap 171 between the anode groups 1611B, and the position of the first extension section 141 does not involve the anode contact holes 1311, so the size of the first extension section 141 along the second direction Y can be appropriately reduced according to the requirements of the light-emitting area.

[0052] Please note that Figure 5 In the existing display panel 1, the anode contact hole 1311 is provided below the anode 1611 to achieve electrical connection between the anode 1611 and the pixel driving circuit 120. As the pixel density of the display panel 1 continues to increase, in order to increase the aperture ratio of the sub-pixels and expand the effective light-emitting area, the width of the pixel extension segment 14A is usually reduced in the prior art so that more area is used for light emission. However, when the width of the pixel extension segment 14A is reduced, the position of the anode contact hole 1311 will inevitably be closer to the boundary between the pixel extension segment 14A and the light-emitting area, thereby causing the anode contact hole 1311 to be exposed to the air during use, and easily affected by moisture or oxygen, resulting in corrosion, poor connection, and even light leakage, dark spots or local uneven light emission, which seriously affects the electrical performance and display quality of the device.

[0053] It is understood that to alleviate the problem of insufficient shielding of the anode contact hole 1311 caused by reducing the width of the pixel definition layer in the process of improving the aperture ratio of the sub-pixel, this embodiment sets the dimension of the second extension section 142 along the second direction Y to be larger than the dimension of the first extension section 141 along the second direction Y. This allows the use of a wider second extension section 142 in the area where the anode contact hole 1311 is located to ensure effective shielding, while a narrower first extension section 141 can be used in areas where the anode contact hole 1311 is not located, thereby freeing up more area for light emission. Since the pixel opening 140 is generally located in the area between two adjacent extension sections, reducing the width of the first extension section 141 means that the spacing between the two adjacent extension sections is increased, thereby expanding the lateral dimension of the pixel opening 140 and improving the aperture ratio of the sub-pixel.

[0054] In addition, the above-mentioned "dimension of the second extension segment 142 along the second direction Y" refers to the length or extension distance of the second extension segment 142 in the second direction Y, that is, the spatial range occupied by the second extension segment 142 extending between the two anodes 1611 of the anode group 1611B; "dimension of the first extension segment 141 along the second direction Y" refers to the length or extension distance of the first extension segment 141 in the second direction Y, that is, the spatial range occupied by the first extension segment 141 extending between the adjacent two anodes 1611 of the two adjacent anode groups 1611B; "lateral dimension of the pixel opening 140" refers to the width of the area not blocked by the first pixel definition layer 14 between two adjacent extension segments (for example, the first extension segment 141 and the second extension segment 142) in the second direction Y. This area is the light-emitting window corresponding to the sub-pixel. The larger its size, the larger the effective light-emitting area exposed by the unit pixel.

[0055] Specifically, the plurality of first extension segments 141 and the plurality of second extension segments 142 are alternately arranged in the second direction Y, so that the first pixel definition layer 14 presents pattern features with a certain periodicity and directionality, thereby improving the alignment accuracy and pattern replication consistency in the photolithography process, thereby improving the process stability of the first pixel definition layer 14; and by differentiating the sizes of the first extension segments 141 and the second extension segments 142, the area where the anode contact hole 1311 is provided is structurally distinguished from the area where the contact hole is not provided, thereby freeing up more space for light emission without sacrificing the shielding reliability of the anode contact hole 1311, thereby improving the aperture ratio of the sub-pixel.

[0056] Among them, the dimension of the second extension section 142 along the second direction Y is set to be greater than 1.8 microns. It can be understood that in the photolithography or evaporation process, since the mask pattern may have an alignment offset within ±0.2 microns, and the diameter of the anode contact hole 1311 is usually about 1.0 micron, if the width of the second extension section 142 is too narrow, it is easy to cause insufficient coverage when the stacking is offset or the edge is warped. By setting the dimension of the second extension section 142 along the second direction Y to be greater than 1.8 microns, it can be ensured that the second extension section 142 can effectively shield the anode contact hole 1311 located thereunder, so that in the actual manufacturing process, even if there is a height error caused by mask pattern offset or film layer stacking, the second extension section 142 can still maintain reliable coverage of the anode contact hole 1311, thereby reducing the risks of poor electrical connection, light leakage or local luminescence defects caused by partial exposure of the anode contact hole 1311.

[0057] In addition, the size of the first extension section 141 along the second direction Y is less than 1.4 microns. Since the first extension section 141 is located in an area where the anode contact hole 1311 is not provided, the size of the first extension section 141 along the second direction Y can be relatively narrowed. By reducing the size of the first extension section 141 along the second direction Y, the occupied area of ​​the first extension section 141 in the sub-pixel area can be reduced, thereby expanding the lateral size of the pixel opening 140 between the first extension section 141 and the second extension section 142, improving the effective aperture ratio of the sub-pixel, and thereby achieving a high-brightness, high-resolution display effect of the display panel 1.

[0058] Furthermore, the display panel 1 also includes a second pixel definition layer 15, which is arranged on a side of the first pixel definition layer 14 away from the anode layer 161, and the second pixel definition layer 15 includes a plurality of third extension segments 151 arranged at intervals along the first direction X; wherein, in a top-down perspective, the third extension segment 151 covers a third gap 173 between two adjacent anodes 1611 of two adjacent anode columns 1611A, thereby limiting the boundary of the sub-pixel opening 140 in the first direction X.

[0059] In which, the size of the third extension segment 151 along the first direction X is smaller than the size of the second extension segment 142 along the second direction Y, thereby avoiding excessive blocking of the sub-pixel opening 140 by the third extension segment 151, increasing the effective aperture ratio of the sub-pixel, and thereby improving the brightness uniformity and image quality of the display panel 1.

[0060] Specifically, the third extension section 151 is linear when viewed from above, and when viewed from above, the third extension section 151 also covers a portion of the two adjacent main bodies 1611C of the two adjacent anode groups 1611B, so that the third extension section 151 can protect the edges of the main bodies 1611C, reduce the contact area between the main bodies 1611C and the air, avoid the risk of the anode 1611 being affected by air and moisture, reduce the probability of the anode 1611 undergoing a reduction reaction, and thereby improve the stability of the display panel 1.

[0061] In addition, when viewed from above, the third extension section 151 is spaced apart from the two anode contact holes 1311 corresponding to the two adjacent anodes 1611 of the two adjacent anode groups 1611B, that is, the third extension section 151 does not cover the anode contact hole 1311 area, and the third extension section 151 is set to avoid the anode contact hole 1311, so that the size of the third extension section 151 along the first direction X can be appropriately reduced according to the requirements of the light-emitting area, simplifying the graphic design of the second pixel definition layer 15, increasing the spacing between the two adjacent third extension sections 151, and thereby improving the aperture ratio of the sub-pixel.

[0062] Please continue to combine Figures 1 to 4 In one embodiment, the anode 1611 includes a main portion 1611C and an auxiliary portion 1611D that are connected to each other, and the auxiliary portion 1611D is electrically connected to the pixel driving circuit 120 through the anode contact hole 1311; wherein, in the same anode group 1611B, the auxiliary portion 1611D of each anode 1611 is connected to a side of the main portion 1611C close to the other anode 1611 in the second direction Y, so that in the same anode group 1611B, the anode contact holes 1311 are concentrated in the middle area of ​​the anode group 1611B when viewed from above, and only one second extension section 142 is required to simultaneously cover the two anode contact holes 1311 corresponding to the two anodes 1611 in the same anode group 1611B.

[0063] Specifically, the area of ​​the auxiliary portion 1611D projected on the substrate 11 is smaller than the area of ​​the main portion 1611C projected on the substrate 11. The main portion 1611C is in direct contact with the light-emitting layer 162, thereby ensuring effective current transfer and improving the luminous efficiency of the light-emitting layer 162.

[0064] It can be understood that compared with the dispersed layout of the anode contact holes 1311, in this embodiment, in the same anode group 1611B, the auxiliary portion 1611D of each anode 1611 is connected to the side of the main portion 1611C close to the other anode 1611 in the second direction Y, thereby eliminating the need to set a separate shielding structure for each anode contact hole 1311, reducing the repeated setting of the pixel definition layer shielding area, and simplifying the graphic design of the second extension segment 142, thereby improving the space utilization and process consistency of the second extension segment 142.

[0065] At the same time, the electrical connection path between the anode 1611 and the anode contact hole 1311 is made shorter and more concentrated, avoiding the invasion of the light-emitting area by scattered wiring, releasing more effective area for depositing the light-emitting layer 162, and improving the aperture ratio of the sub-pixel.

[0066] Furthermore, the first gap 171 is located between the two adjacent main bodies 1611C of the two adjacent anode groups 1611B, and the first gap 171 is linear in the top-down perspective, so that the multiple first gaps 171 form a linear and continuous layout design along the second direction Y, thereby improving the consistency and arrangement regularity of the graphics of the first extension section 141, simplifying the pattern design of the photolithography mask, and improving the alignment accuracy and graphic periodicity of the first extension section 141 in the actual process; at the same time, the linear layout of the first gap 171 in the top-down perspective is also conducive to improving the uniform distribution of the pixel opening 140 along the second direction Y, further improving the consistency of the light-emitting area and the overall balance of the display screen.

[0067] It should be noted that "the first gap 171 is linear in the top view" is only an example. This embodiment is not limited to a strict geometric straight line. For example, in some embodiments, the first gap 171 may present a folded line structure that is approximately a straight line or a slightly curved structure. As long as its overall arrangement direction visually maintains linear extensibility and does not affect the pattern alignment and consistency between pixels, it can also be regarded as a "linear" category.

[0068] Specifically, when viewed from above, the first extension section 141 also covers a portion of the two adjacent main bodies 1611C of the two adjacent anode groups 1611B, so that the first extension section 141 can protect the edges of the main bodies 1611C, reduce the contact area between the main bodies 1611C and the air, avoid the risk of the anode 1611 being affected by air and moisture, reduce the probability of the anode 1611 undergoing a reduction reaction, and thereby improve the stability of the display panel 1.

[0069] In addition, when viewed from above, the first extension section 141 is spaced apart from the two anode contact holes 1311 corresponding to the two adjacent anodes 1611 of the two adjacent anode groups 1611B, that is, the first extension section 141 does not cover the anode contact hole 1311 area, thereby avoiding problems such as graphic occlusion, pattern dislocation or electrical connection interference caused by unnecessary coverage; at the same time, by making the first extension section 141 avoid the anode contact hole 1311, the structural design of the first pixel definition layer 14 is simplified, and the distance between the first extension section 141 and the second extension section 142 is expanded, thereby improving the aperture ratio of the sub-pixel.

[0070] Please continue to combine Figures 1 to 4 In one embodiment, in a top-down perspective, in the same anode group 1611B, the second gap 172 includes a first spacer segment 172A, a second spacer segment 172B, and a third spacer segment 172C that are connected in sequence; wherein, the first spacer segment 172A is located between the main portion 1611C of one of the anodes 1611 and the auxiliary portion 1611D of the other anode 1611, the second spacer segment 172B is located between the auxiliary portion 1611D of one of the anodes 1611 and the auxiliary portion 1611D of the other anode 1611, and the third spacer segment 172C is located between the auxiliary portion 1611D of one of the anodes 1611 and the main portion 1611C of the other anode 1611, so that the second gap 172 is in a broken line shape in the top-down perspective.

[0071] Specifically, the extension direction of the first gap 171 is set perpendicular to the extension direction of the second gap 172, and the extension direction of the second gap 172 is set perpendicular to the extension direction of the third gap 173. The extension direction of the first gap 171 is parallel to the extension direction of the third gap 173. For example, the first gap 171 and the third gap 173 both extend along the first direction X, and the second gap 172 extends along the second direction Y, so that the two anode contact holes 1311 corresponding to the two anodes 1611 in the same anode group 1611B are arranged in a mirror image with the second gap 172 as the symmetry axis in a top-down perspective, so that the arrangement of the two anode contact holes 1311 in the first direction X is more concentrated.

[0072] It can be understood that by arranging the two anode contact holes 1311 corresponding to the two anodes 1611 in the same anode group 1611B in a mirror-image manner with the second gap 172 as the symmetry axis in a top-down perspective, it is possible to achieve unified shielding of the two anode contact holes 1311 by a second extension section 142, thereby improving the utilization efficiency of the second extension section 142; the second extension section 142 is linear in the top-down perspective, thereby simplifying the pattern design difficulty of the second extension section 142; at the same time, the tolerance of the second extension section 142 to process fluctuations such as mask offset and photolithography alignment error is enhanced, thereby improving the stability and shielding reliability of the first pixel definition layer 14.

[0073] Furthermore, when viewed from above, the second extension section 142 also covers the two auxiliary parts 1611D of the anode group 1611B and a part of the two main parts 1611C of the anode group 1611B, thereby further increasing the shielding area of ​​the second extension section 142 on the basis of ensuring reliable shielding of the anode contact hole 1311 by the second extension section 142, enhancing the adaptability of the second extension section 142 to process errors such as photolithography pattern offset or film layer height fluctuation, and improving the shielding tolerance range and structural stability of the pixel definition layer.

[0074] At the same time, since the second extension section 142 also covers a portion of the two main parts 1611C of the anode group 1611B, the second extension section 142 can effectively seal the anode contact hole 1311 and its surrounding structures, reduce the risk of infiltration of external corrosive gases such as oxygen and moisture, prevent the metal anode 1611 from undergoing oxidation or reduction reactions, improve the long-term reliability of the electrode connection area, and further improve the life and stability of the display panel 1.

[0075] Specifically, a first overlapping area is formed between the first extension section 141 and two adjacent anodes 1611 of the anode group 1611B, and a second overlapping area is formed between the second extension section 142 and the two anodes 1611 of the anode group 1611B; wherein the first overlapping area is smaller than the second overlapping area.

[0076] It is understood that the first extension section 141 is used to define the boundary of the pixel opening 140 between the two anodes 1611. The overlapping area between the first extension section 141 and the anode 1611 is small, thereby avoiding unnecessary blocking of the anode 1611 by the first extension section 141, thereby improving the aperture ratio of the sub-pixel.

[0077] In addition, the second extension section 142 is used to shield the anode contact hole 1311 and its surrounding area. The overlapping area between the second extension section 142 and the anode 1611 is relatively large, thereby enhancing the adaptability of the second extension section 142 to manufacturing errors (such as pattern offset, mask error, etc.), and ensuring a stable shielding effect of the anode contact hole 1311.

[0078] Please combine Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6 ;in, Figure 6 This is a structural schematic diagram of the display device provided in an embodiment of the present application; this embodiment also provides a display device 2, which includes the display panel 1 described in any of the above embodiments; wherein, the display device 2 may also include a middle frame 21, and the middle frame 21 is combined with the display panel 1 as a whole to provide support, fixation and protection for the display panel 1.

[0079] It can be understood that the display panel 1 has been described in detail in the above embodiments and will not be repeated here; wherein, since the display device 2 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0080] In specific applications, the display device 2 can be at least one of a smart phone, tablet computer, mobile phone, video phone, e-book reader, desktop computer, laptop, netbook, workstation, server, personal digital assistant, portable media player, MP3 player, mobile medical machine, camera, game console, digital camera, car navigation system, electronic billboard, ATM or wearable device, etc., which have a display function.

[0081] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0082] The above is a detailed introduction to a display panel and a display device provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, characterized in that: include: substrate; a circuit layer, located on the substrate, comprising a plurality of pixel driving circuits; a planar layer, located on the circuit layer and provided with a plurality of anode contact holes; an anode layer, disposed on the planar layer and comprising a plurality of anodes, wherein the anodes are connected to the pixel driving circuit through the anode contact holes, wherein the plurality of anodes comprise a plurality of anode columns arranged along a first direction, each of the anode columns comprises a plurality of anode groups arranged along a second direction, each of the anode groups comprises two anodes arranged along the second direction, and the second direction intersects the first direction; and A first pixel definition layer is provided on the anode layer and includes a plurality of first extension segments and a plurality of second extension segments arranged along the second direction; In which, from a top-down perspective, in the anode column, the first extension section covers the first gap between two adjacent anodes of two adjacent anode groups, the second extension section covers the second gap between the two anodes of the anode group and the two anode contact holes corresponding to the two anodes, and the size of the second extension section along the second direction is larger than the size of the first extension section along the second direction.

2. The display panel according to claim 1, wherein: The plurality of first extension segments and the plurality of second extension segments are alternately arranged in the second direction; The size of the second extension segment along the second direction is greater than 1.8 microns, and the size of the first extension segment along the second direction is less than 1.4 microns.

3. The display panel according to claim 1, wherein: The anode includes a main portion and an auxiliary portion that are connected to each other, and the auxiliary portion is electrically connected to the pixel driving circuit through the anode contact hole; wherein, in the same anode group, the auxiliary portion of each anode is connected to a side of the main portion close to another anode in the second direction.

4. The display panel according to claim 3, wherein: The first gap is located between two adjacent main bodies of two adjacent anode groups, and / or the first gap is linear in the top view.

5. The display panel according to claim 4, wherein: In a top view, the first extension section also covers a portion of the two adjacent main bodies of the two adjacent anode groups; and / or, In a top view, the first extension section is spaced apart from two anode contact holes corresponding to two adjacent anodes of two adjacent anode groups.

6. The display panel according to claim 3, wherein: In a top view, in the same anode group, the second gap includes a first spacing segment, a second spacing segment, and a third spacing segment connected in sequence; In which, the first spacing segment is located between the main part of one of the anodes and the auxiliary part of the other anode, the second spacing segment is located between the auxiliary part of one of the anodes and the auxiliary part of the other anode, and the third spacing segment is located between the auxiliary part of one of the anodes and the main part of the other anode; and / or the second gap is in the shape of a broken line when viewed from above.

7. The display panel according to claim 6, wherein: In a top view, the second extension section also covers the two auxiliary portions of the anode group and a portion of the two main portions of the anode group.

8. The display panel according to claim 7, wherein: There is a first overlapping area between the first extension section and two adjacent anodes of the two adjacent anode groups, and there is a second overlapping area between the second extension section and two anodes of the anode group; wherein the first overlapping area is smaller than the second overlapping area.

9. The display panel according to any one of claims 1 to 8, characterized in that: The display panel further includes a second pixel definition layer, the second pixel definition layer is arranged on a side of the first pixel definition layer away from the anode layer, and the second pixel definition layer includes a plurality of third extension segments spaced apart along the first direction; In a top view, the third extension section covers a third gap between two adjacent anodes of two adjacent anode columns, and a dimension of the third extension section along the first direction is smaller than a dimension of the second extension section along the second direction.

10. A display device, characterized in that: The device comprises the display panel according to any one of claims 1 to 9.

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