Display substrate and display device

Abstract

The invention provides a display substrate and a display device, relates to the technical field of display, and is used for improving the flatness of an anode in a display product. The display substrate comprises a first anode and further comprises a first conductive layer and a second conductive layer, the orthographic projection of the first anode on the substrate and the orthographic projection of a first conductive part in the first conductive layer on the substrate have a first overlapping area, and the orthographic projection of the first anode on the substrate and the orthographic projection of a second conductive part in the first conductive layer on the substrate have a second overlapping area. The orthographic projection of the first conductive part and the orthographic projection of the second conductive part in the first conductive layer on the substrate have a second overlapping area. The orthographic projection of the first anode on the substrate and the orthographic projection of a third conductive part in the second conductive layer on the substrate have a third overlapping region, and the orthographic projection of the first anode on the substrate and the orthographic projection of a fourth conductive part in the second conductive layer on the substrate have a fourth overlapping region; the first overlapping region and the third overlapping region are at least partially overlapped, and the second overlapping region and the fourth overlapping region are at least partially overlapped.

Description

Technical Field

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

[0002] With the continuous development of display technology, the application scope of display products is becoming more and more extensive, and correspondingly, consumers have higher and higher requirements for the display quality of display products. Display products include multiple sub-pixels, and the flatness of the anode in the sub-pixel is a key factor affecting the uniformity of display quality and has received attention. Therefore, how to improve the flatness of the anode in display products has become a technical problem that needs to be solved urgently. Summary of the invention

[0003] An object of the present invention is to provide a display substrate and a display device, which are used to improve the flatness of an anode in a display product.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] A first aspect of the present invention provides a display substrate, comprising: a base substrate and a plurality of sub-pixels arranged on the base substrate, wherein a first sub-pixel of the plurality of sub-pixels comprises a first anode; the display substrate further comprises a first conductive layer and a second conductive layer, wherein at least a portion of the second conductive layer is located between the first conductive layer and the base substrate; the first conductive layer comprises at least one first conductive portion and at least one second conductive portion; the second conductive layer comprises at least one third conductive portion and at least one fourth conductive portion;

[0006] The orthographic projection of the first anode on the substrate has a first overlapping area with the orthographic projection of the at least one first conductive part on the substrate, and the orthographic projection of the first anode on the substrate has a second overlapping area with the orthographic projection of the at least one second conductive part on the substrate; the orthographic projection of the first anode on the substrate has a third overlapping area with the orthographic projection of the at least one third conductive part on the substrate, and the orthographic projection of the first anode on the substrate has a fourth overlapping area with the orthographic projection of the at least one fourth conductive part on the substrate; the first overlapping area at least partially overlaps with the third overlapping area, and the second overlapping area at least partially overlaps with the fourth overlapping area.

[0007] Optionally, the first overlapping region and the second overlapping region are symmetrically arranged about a center line of the first anode; and / or the third overlapping region and the fourth overlapping region are symmetrically arranged about the center line.

[0008] Optionally, the orthographic projection of the first conductive portion on the base substrate at least partially overlaps with the orthographic projection of the third conductive portion on the base substrate, and the orthographic projection of the second conductive portion on the base substrate at least partially overlaps with the orthographic projection of the fourth conductive portion on the base substrate.

[0009] Optionally, the display substrate also includes a grid-shaped power layer, the power layer includes a plurality of power lines and a plurality of power compensation lines, the power lines are coupled to the power compensation lines; the power lines are multiplexed as the first conductive part and / or the second conductive part, and the power compensation lines are multiplexed as the third conductive part and / or the fourth conductive part.

[0010] Optionally, the power compensation line includes a plurality of first compensation parts and a plurality of second compensation parts, the first compensation parts and the second compensation parts are arranged in different layers, the orthographic projection of the first compensation parts on the substrate and the orthographic projection of the second compensation parts on the substrate are alternately arranged along a first direction, and adjacent first compensation parts and second compensation parts are coupled; the first compensation part is multiplexed as the third conductive part and / or the fourth conductive part, and at least part of the second compensation part is located between the first compensation part and the substrate.

[0011] Optionally, the first compensation part includes a compensation main body and two compensation extension parts respectively coupled to the compensation main body, the two compensation extension parts are arranged along the first direction, the extension direction of the compensation extension part is the same as the extension direction of the center line, and the compensation extension part is multiplexed as the third conductive part and / or the fourth conductive part.

[0012] Optionally, the display substrate further includes a plurality of data lines, and the data lines are multiplexed as the first conductive portion and / or the second conductive portion.

[0013] Optionally, the first conductive layer further includes a fifth conductive portion, and an orthographic projection of the fifth conductive portion on the base substrate covers an orthographic projection of a center line of the first anode on the base substrate.

[0014] Optionally, the display substrate includes a display area, the display area includes a central display area and an edge display area; in the central display area, the display substrate also includes a data transfer line, the data transfer line is coupled to the corresponding data line, the data transfer line extends from the display area to a peripheral area located around the display area; the data transfer line is multiplexed as the fifth conductive part.

[0015] Optionally, the display substrate includes a display area, and the display area includes a central display area and an edge display area; the display substrate also includes a compensation switching line; in the edge display area, the power line and the data line are multiplexed as the second conductive part, and the compensation switching line is multiplexed as the fifth conductive part.

[0016] Optionally, the first conductive portion is coupled to the compensation adapter line; and / or the third conductive portion is coupled to the compensation adapter line.

[0017] Optionally, in the edge display area, the third conductive portion includes a conductive main body portion, and a first conductive extension portion, a second conductive extension portion and a third conductive extension portion respectively coupled to the conductive main body portion;

[0018] The orthographic projection of the first anode on the substrate at least partially overlaps with the orthographic projection of the conductive main portion on the substrate; and / or, the orthographic projection of the first anode on the substrate at least partially overlaps with the orthographic projection of the first conductive extension portion on the substrate; and / or, the orthographic projection of the first anode on the substrate at least partially overlaps with the orthographic projection of the second conductive extension portion on the substrate.

[0019] Optionally, the plurality of sub-pixels include a plurality of first sub-pixels and a plurality of second sub-pixels, the plurality of first sub-pixels include a plurality of red sub-pixels and a plurality of blue sub-pixels, and the second sub-pixels include a green sub-pixel;

[0020] The first conductive layer further includes a sixth conductive portion, and the second conductive layer further includes a seventh conductive portion;

[0021] The second sub-pixel includes a second anode, and the second anode includes a second anode main portion and a second anode extension portion, the orthographic projection of the second anode main portion on the base substrate is located inside the orthographic projection of the sixth conductive portion on the base substrate, and / or the orthographic projection of the second anode main portion on the base substrate is located inside the orthographic projection of the seventh conductive portion on the base substrate.

[0022] Optionally, the display substrate includes a first source-drain metal layer, a second source-drain metal layer and a third source-drain metal layer stacked in sequence in a direction away from the base substrate; the first conductive layer includes the third source-drain metal layer, and the second conductive layer includes the second source-drain metal layer.

[0023] Based on the technical solution of the above-mentioned display substrate, a second aspect of the present invention provides a display device, comprising the above-mentioned display substrate.

[0024] In the technical solution provided by the present invention, the first conductive part and the second conductive part included in the first conductive layer located below the first anode and closest to the first anode can be distributed on both sides of the center line; the third conductive part and the fourth conductive part included in the second conductive layer located below the first anode and second closest to the first anode can be distributed on both sides of the center line; in this way, the first anode located below the parts on both sides of the center line all have the conductive part included in the first conductive layer, and / or all have the conductive part included in the second conductive layer, which minimizes the influence of the first conductive layer and the second conductive layer on the flatness of the first anode, improves the flatness of the first anode, thereby improving the problem of poor uniformity of image quality caused by poor flatness of the anode, ensuring the continuity and uniformity of brightness of the light-emitting element, and effectively improving the display quality. Moreover, in the above-mentioned arrangement, the first conductive part and the second conductive part can be formed simultaneously with other structures included in the first conductive layer in the same patterning process, and the third conductive part and the fourth conductive part can be formed simultaneously with other structures included in the second conductive layer in the same patterning process, without adding additional patterning processes. At the same time, there is no need to increase the thickness of the organic insulating layer below the first anode, which is conducive to the thinning of the display substrate.

[0025] In the display substrate provided by the present invention, by setting the first overlapping area and the third overlapping area to at least partially overlap, and the second overlapping area and the fourth overlapping area to at least partially overlap, the influence of the first conductive layer and the second conductive layer on the flatness of the surface where the first anode is located can be reduced, and the flatness of the first anode is improved, thereby improving the problem of poor image quality uniformity caused by poor anode flatness, ensuring the continuity of light emission and brightness uniformity of the light-emitting element, and effectively improving the display quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 A circuit structure diagram of a sub-pixel driving circuit provided in an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the layout of a polysilicon active layer and a first gate metal layer in a central display area of ​​a display substrate provided by an embodiment of the present invention;

[0029] Figure 3 For Figure 2 A schematic diagram of a layout of adding a second gate metal layer on the basis of FIG.

[0030] Figure 4For Figure 2 A schematic diagram of a layout of adding a first source-drain metal layer on the basis of FIG.

[0031] Figure 5 Figure 4 A schematic diagram of the layout of the first source and drain metal layer added in FIG.

[0032] Figure 6 A schematic diagram of the layout of the oxide active layer, the second gate metal layer and the third gate metal layer in the middle display area of ​​the display substrate provided by an embodiment of the present invention;

[0033] Figure 7 For Figure 6 A schematic diagram of a layout of adding a first source-drain metal layer on the basis of FIG.

[0034] Figure 8 A schematic diagram of the layout of the polysilicon active layer to the second source-drain metal layer in the middle display area of ​​the display substrate provided by an embodiment of the present invention;

[0035] Fig. 9 for Figure 8 A schematic diagram of the layout of the second source and drain metal layer in FIG.

[0036] Fig.10 A schematic diagram of the layout of the polysilicon active layer to the third source-drain metal layer in the middle display area of ​​the display substrate provided by an embodiment of the present invention;

[0037] Fig.11 for Fig.10 A schematic diagram of the layout of the third source and drain metal layer in FIG.

[0038] Fig.12 A schematic diagram of the layout of the second source-drain metal layer, the third source-drain metal layer and the anode layer in the central display area of ​​the display substrate provided by an embodiment of the present invention;

[0039] Fig.13 A schematic diagram of the layout of the second source-drain metal layer in the middle display area and the edge display area of ​​the display substrate provided by an embodiment of the present invention;

[0040] Fig.14 A schematic diagram of the layout of the third source-drain metal layer in the middle display area and the edge display area of ​​the display substrate provided by an embodiment of the present invention;

[0041] Fig.15 A schematic diagram of the layout of the third source-drain metal layer and the anode layer in the middle display area and the edge display area of ​​the display substrate provided by an embodiment of the present invention;

[0042] Fig.16 A schematic diagram of the layout of the second source-drain metal layer, the third source-drain metal layer and the anode layer in the central display area and the edge display area of ​​the display substrate provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0043] In order to further illustrate the display substrate and the display device provided by the embodiments of the present invention, a detailed description is given below in conjunction with the accompanying drawings.

[0044] See also Fig. 9 , Fig.11 and Fig.12 An embodiment of the present invention provides a display substrate, comprising: a base substrate and a plurality of sub-pixels arranged on the base substrate, wherein a first sub-pixel of the plurality of sub-pixels comprises a first anode Ano1; the display substrate further comprises a first conductive layer and a second conductive layer, wherein at least a portion of the second conductive layer is located between the first conductive layer and the base substrate; the first conductive layer comprises at least one first conductive portion 11 and at least one second conductive portion 12; the second conductive layer comprises at least one third conductive portion 21 and at least one fourth conductive portion 22;

[0045] The orthographic projection of the first anode Ano1 on the substrate has a first overlapping area with the orthographic projection of the at least one first conductive portion 11 on the substrate, and the orthographic projection of the first anode Ano1 on the substrate has a second overlapping area with the orthographic projection of the at least one second conductive portion 12 on the substrate; the orthographic projection of the first anode Ano1 on the substrate has a third overlapping area with the orthographic projection of the at least one third conductive portion 21 on the substrate, and the orthographic projection of the first anode Ano1 on the substrate has a fourth overlapping area with the orthographic projection of the at least one fourth conductive portion 22 on the substrate; the first overlapping area Q1 at least partially overlaps with the third overlapping area Q3, and the second overlapping area Q2 at least partially overlaps with the fourth overlapping area Q4.

[0046] Exemplarily, the center line 50 of the first anode Ano1 is located between the first overlapping region and the second overlapping region; and / or, the center line 50 is located between the third overlapping region and the fourth overlapping region.

[0047] Exemplarily, the plurality of sub-pixels include a plurality of first sub-pixels and a plurality of second sub-pixels, the plurality of first sub-pixels include a plurality of red sub-pixels and a plurality of blue sub-pixels, and the second sub-pixels include a green sub-pixel.

[0048] Exemplarily, a circuit structure of a sub-pixel driving circuit included in the first sub-pixel is the same as a circuit structure of a sub-pixel driving circuit included in the second sub-pixel.

[0049] Exemplarily, the display substrate includes a buffer layer, a polysilicon active layer, a first gate insulating layer, a first gate metal layer, a second gate insulating layer, a second gate metal layer, a third gate insulating layer, an oxide active layer, a fourth gate insulating layer, a third gate metal layer, an interlayer insulating layer, a first source-drain metal layer, a first flat layer, a second source-drain metal layer, a second flat layer, a third source-drain metal layer, a third flat layer, an anode layer, a pixel defining layer, a light-emitting functional layer, a cathode layer, a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer, which are sequentially stacked in a direction away from the base substrate. The display substrate may also be provided with a passivation layer according to actual needs. The passivation layer may be located between the first source-drain metal layer and the first flat layer, but is not limited thereto.

[0050] Exemplarily, the first conductive layer includes the third source-drain metal layer, and the second conductive layer includes the second source-drain metal layer.

[0051] Exemplarily, the first anode Ano1 includes a first anode main portion and a first anode extension portion, the first anode main portion and the first anode extension portion form an integrated structure, the orthographic projection of the first anode main portion on the substrate is the orthographic projection of a pixel opening area surrounding the first sub-pixel on the substrate, and the first anode extension portion is coupled to a corresponding sub-pixel driving circuit.

[0052] Exemplarily, the orthographic projection of the first anode body portion on the substrate has a first overlapping area with the orthographic projection of the at least one first conductive portion 11 on the substrate, the orthographic projection of the first anode body portion on the substrate has a second overlapping area with the orthographic projection of the at least one second conductive portion 12 on the substrate, and the center line 50 of the first anode body portion is located between the first overlapping area and the second overlapping area.

[0053] Exemplarily, the orthographic projection of the first anode body portion on the substrate has a third overlapping area with the orthographic projection of the at least one third conductive portion 21 on the substrate, the orthographic projection of the first anode body portion on the substrate has a fourth overlapping area with the orthographic projection of the at least one fourth conductive portion 22 on the substrate, and the center line 50 of the first anode body portion is located between the third overlapping area and the fourth overlapping area.

[0054] According to the specific structure of the display substrate described above, the display substrate provided in the embodiment of the present invention includes a first conductive layer and a second conductive layer, and the second conductive layer is located between the first conductive layer and the base substrate; the first conductive layer includes at least one first conductive portion 11 and at least one second conductive portion 12; the second conductive layer includes at least one third conductive portion 21 and at least one fourth conductive portion 22; the orthographic projection of the first anode Ano1 on the base substrate has a first overlapping area with the orthographic projection of the at least one first conductive portion 11 on the base substrate, the orthographic projection of the first anode Ano1 on the base substrate has a second overlapping area with the orthographic projection of the at least one second conductive portion 12 on the base substrate, and the center line 50 of the first anode Ano1 is located between the first overlapping area and the second overlapping area; and / or, the orthographic projection of the first anode Ano1 on the base substrate has a third overlapping area with the orthographic projection of the at least one third conductive portion 21 on the base substrate, the orthographic projection of the first anode Ano1 on the base substrate has a fourth overlapping area with the orthographic projection of the at least one fourth conductive portion 22 on the base substrate, and the center line 50 is located between the third overlapping area and the fourth overlapping area.

[0055] The above-mentioned arrangement makes it possible for the first conductive portion 11 and the second conductive portion 12 included in the first conductive layer located below the first anode Ano1 and closest to the first anode Ano1 to be distributed on both sides of the center line 50; and makes it possible for the third conductive portion 21 and the fourth conductive portion 22 included in the second conductive layer located below the first anode Ano1 and second closest to the first anode Ano1 to be distributed on both sides of the center line 50; in this way, the first anode Ano1 is located below the portion on both sides of the center line 50, and both have the conductive portion included in the first conductive layer, and / or both have the conductive portion included in the second conductive layer, thereby minimizing the influence of the first conductive layer and the second conductive layer on the flatness of the first anode Ano1, improving the flatness of the first anode Ano1, thereby improving the problem of poor image quality uniformity caused by poor anode flatness, ensuring the continuity and brightness uniformity of the light emitting element, and effectively improving the display quality.

[0056] Moreover, in the above arrangement, the first conductive part 11 and the second conductive part 12 can be formed simultaneously with other structures included in the first conductive layer in the same patterning process, and the third conductive part 21 and the fourth conductive part 22 can be formed simultaneously with other structures included in the second conductive layer in the same patterning process, without adding an additional patterning process. At the same time, there is no need to increase the thickness of the organic insulating layer under the first anode Ano1, which is conducive to the development of thin display substrates.

[0057] In the display substrate provided by the embodiment of the present invention, by setting the first overlapping area Q1 and the third overlapping area Q3 to at least partially overlap, and the second overlapping area Q2 and the fourth overlapping area Q4 to at least partially overlap, the influence of the first conductive layer and the second conductive layer on the flatness of the surface where the first anode is located can be reduced, and the flatness of the first anode Ano1 is improved, thereby improving the problem of poor image quality uniformity caused by poor anode flatness, ensuring the continuity of light emission and brightness uniformity of the light-emitting element, and effectively improving the display quality.

[0058] It should be noted that some unnecessary lines in the drawings are for drawing requirements, and the actual structure is an integrated structure, not a spliced ​​structure at the lines. For example: Fig. 9 All the graphics in are formed by the second source and drain metal layer, and are all in the same layer structure. Fig. 9 The first compensation part VDD21 in is an integrated structure.

[0059] like Fig. 9 , Fig.11 and Fig.12 As shown, in some embodiments, the first overlapping region and the second overlapping region are symmetrically arranged about the center line 50; and / or, the third overlapping region and the fourth overlapping region are symmetrically arranged about the center line 50.

[0060] Illustratively, the first overlapping region at least partially overlaps with the third overlapping region, and the second overlapping region at least partially overlaps with the fourth overlapping region.

[0061] The above-mentioned arrangement makes the first conductive part 11 and the second conductive part 12 located below the first anode Ano1 symmetrically arranged about the center line 50, and the third conductive part 21 and the fourth conductive part 22 located below the first anode Ano1 are symmetrically arranged about the center line 50, so that the second conductive layer located below the first anode Ano1 and closest to the first anode Ano1 is symmetrically arranged about the center line 50, and the second conductive layer located below the first anode Ano1 and second closest to the first anode Ano1 is symmetrically arranged about the center line 50, further improving the flatness of the first anode Ano1, thereby improving the problem of poor image quality uniformity caused by poor anode flatness, ensuring the continuity of light emission and brightness uniformity of the light-emitting element, and effectively improving the display quality.

[0062] like Fig. 9 , Fig.11 and Fig.12As shown, in some embodiments, the orthographic projection of the first conductive portion 11 on the substrate at least partially overlaps with the orthographic projection of the third conductive portion 21 on the substrate, and the orthographic projection of the second conductive portion 12 on the substrate at least partially overlaps with the orthographic projection of the fourth conductive portion 22 on the substrate.

[0063] The above-mentioned arrangement makes the first anode Ano1 located below the parts on both sides of the center line 50, the first conductive part 11 overlaps with the third conductive part 21, and the second conductive part 12 overlaps with the fourth conductive part 22, thereby improving the flatness of the first anode Ano1, thereby improving the problem of poor image quality uniformity caused by poor anode flatness, ensuring the continuity and brightness uniformity of the light emitting element, and effectively improving the display quality.

[0064] like Figure 5 , Figures 8 to 12 As shown, in some embodiments, the display substrate also includes a grid-shaped power layer VDD, the power layer VDD includes multiple power lines VDD1 and multiple power compensation lines VDD2, the power line VDD1 is coupled to the power compensation line VDD2; the power line VDD1 is multiplexed as the first conductive part 11 and / or the second conductive part 12, and the power compensation line VDD2 is multiplexed as the third conductive part 21 and / or the fourth conductive part 22.

[0065] Exemplarily, the power supply compensation line VDD2 includes a plurality of first compensation parts VDD21 and a plurality of second compensation parts VDD22, the first compensation parts VDD21 and the second compensation parts VDD22 are arranged in different layers, the orthographic projection of the first compensation parts VDD21 on the substrate and the orthographic projection of the second compensation parts VDD22 on the substrate are alternately arranged along a first direction, and adjacent first compensation parts VDD21 and second compensation parts VDD22 are coupled; the first compensation part VDD21 is multiplexed as the third conductive part 21 and / or the fourth conductive part 22, and at least part of the second compensation part VDD22 is located between the first compensation part VDD21 and the substrate.

[0066] Exemplarily, the power line VDD1 includes at least a portion extending along the second direction, and the orthographic projection of the power compensation line VDD2 on the substrate includes at least a portion extending along the first direction, and the first direction intersects the second direction. For example, the first direction includes the horizontal direction, and the second direction includes the vertical direction.

[0067] Exemplarily, the power line VDD1 is provided in the same layer and material as the third source-drain metal layer, the first compensation part VDD21 is provided in the same layer and material as the second source-drain metal layer, and the second compensation part VDD22 is provided in the same layer and material as the first source-drain metal layer.

[0068] Exemplarily, the power line VDD1 includes a plurality of solid parts and a plurality of hollow parts, the solid parts and the hollow parts are alternately arranged along the second direction, the hollow parts include a first side part and a second side part arranged opposite to each other along the first direction, one of the first side part and the second side part is reused as the first conductive part 11, and the other of the first side part and the second side part is reused as the second conductive part 12. For example: one of the first side part and the second side part is reused as the second conductive part 12 below the first anode Ano1, and the other of the first side part and the second side part is reused as the first conductive part 11 below the adjacent first anode Ano1.

[0069] Exemplarily, the first compensation part VDD21 includes a compensation main part VDD210 and two compensation extension parts VDD211 respectively coupled to the compensation main part VDD210, the two compensation extension parts VDD211 are arranged along the first direction, the extension direction of the compensation extension part VDD211 is the same as the extension direction of the center line 50, and the compensation extension part VDD211 is multiplexed as the third conductive part 21 and / or the fourth conductive part 22.

[0070] Exemplarily, one of the two compensation extension portions VDD211 is multiplexed as the third conductive portion 21, and the other of the two compensation extension portions VDD211 is multiplexed as the fourth conductive portion 22. For example: one of the two compensation extension portions VDD211 is multiplexed as the third conductive portion 21 under the first anode Ano1, and the other of the two compensation extension portions VDD211 is multiplexed as the fourth conductive portion 22 under the adjacent first anode Ano1.

[0071] The above arrangement enables the existing structure in the display substrate to be reused as the first conductive part 11, the second conductive part 12, the third conductive part 21 and the fourth conductive part 22, without adding additional structures to improve the flatness of the first anode Ano1, thereby reducing the layout difficulty of the display substrate.

[0072] like Fig.11 and Fig.12 As shown, in some embodiments, the display substrate further includes a plurality of data lines DA, and the data lines DA are multiplexed as the first conductive portion 11 and / or the second conductive portion 12 .

[0073] Exemplarily, the plurality of data lines DA are arranged along the first direction, and the data line DA includes at least a portion extending along the second direction.

[0074] Exemplarily, a portion of the data lines DA is multiplexed as the first conductive portion 11 , and another portion of the data lines DA is multiplexed as the second conductive portion 12 .

[0075] The above configuration enables the existing structure in the display substrate to be reused as the first conductive portion 11 and the second conductive portion 12 , without adding additional structures to improve the flatness of the first anode Ano1 , thereby reducing the layout difficulty of the display substrate.

[0076] like Fig.11 and Fig.12 As shown, in some embodiments, the first conductive layer further includes a fifth conductive portion 13, and the orthographic projection of the fifth conductive portion 13 on the base substrate covers the orthographic projection of the center line 50 of the first anode Ano1 on the base substrate.

[0077] Exemplarily, the fifth conductive portion 13 includes at least a portion extending along the second direction.

[0078] Exemplarily, the fifth conductive portion 13 is provided in the same layer and material as the third source-drain metal layer, or the fifth conductive portion 13 is provided in the same layer and material as the second source-drain metal layer, but is not limited thereto.

[0079] Exemplarily, an orthographic projection of the fifth conductive portion 13 on the substrate at least partially overlaps with an orthographic projection of a center line 50 of the first anode Ano1 on the substrate.

[0080] The above-mentioned arrangement that the orthographic projection of the fifth conductive portion 13 on the base substrate covers the orthographic projection of the center line 50 of the first anode Ano1 on the base substrate is beneficial to further improve the flatness of the first anode Ano1.

[0081] like Figures 11 to 16 As shown, in some embodiments, the display substrate includes a display area, and the display area includes a central display area 301 and an edge display area 302; in the central display area 301, the display substrate also includes a data transfer line 40, and the data transfer line 40 is coupled to the corresponding data line DA, and the data transfer line 40 extends from the display area to a peripheral area located around the display area; the data transfer line 40 is multiplexed as the fifth conductive part 13.

[0082] Exemplarily, the edge display area 302 includes a left edge display area and a right edge display area, the left edge display area is close to the left frame of the display substrate, and the right edge display area is close to the right frame of the display substrate. For example, the edge display area 302 is a left edge display area, and at least one column of first anodes Ano1 is arranged in the left edge display area, but it is not limited thereto.

[0083] It should be noted that the data transfer line 40 includes at least a portion extending along the second direction, and the data transfer line 40 is coupled to a corresponding data line DA, which can be a data line DA close to the left frame or a data line DA close to the right frame. The data transfer line 40 extends from the display area to the lower frame below the display area, and is coupled to a driver chip in the display substrate. Setting the data transfer line 40 is conducive to narrowing the width of the lower frame of the display substrate.

[0084] The above-mentioned data transfer line 40 is multiplexed as the fifth conductive portion 13 , and no additional structure is needed to improve the flatness of the first anode Ano1 , thereby reducing the layout difficulty of the display substrate.

[0085] like Figures 13 to 16 As shown, in some embodiments, the display substrate includes a display area, and the display area includes a central display area 301 and an edge display area 302; the display substrate also includes a compensation adapter line 41; in the edge display area 302, the power line VDD1 and the data line DA are multiplexed as the second conductive part 12, and the compensation adapter line 41 is multiplexed as the fifth conductive part 13.

[0086] Exemplarily, in order to improve the uniformity of the display substrate, the display substrate further includes a compensation adapter line 41 , and the structure of the compensation adapter line 41 is substantially the same as that of the data adapter line 40 .

[0087] Exemplarily, the compensation adapter line 41 can be connected to a power signal, ie, the same signal as the power line VDD1, or a negative power signal, ie, the same signal as the cathode in the display substrate, but is not limited thereto.

[0088] Exemplarily, the first conductive part 11 is coupled to the compensation adapter 41; and / or the third conductive part 21 is coupled to the compensation adapter 41. This arrangement enables the first conductive part 11 and the third conductive part 21 to have a stable potential.

[0089] Exemplarily, the first conductive portion 11 and the compensation adapter line 41 are formed into an integral structure, but not limited thereto.

[0090] Illustratively, in the edge display area 302 , the orthographic projection of the third conductive portion 21 on the base substrate and the orthographic projection of the first conductive portion 11 on the base substrate have an overlapping area, and in the overlapping area, the third conductive portion 21 is coupled to the first conductive portion 11 .

[0091] In the edge display area 302, the power line VDD1 and the data line DA are multiplexed as the second conductive part 12, and the compensation adapter line 41 is multiplexed as the fifth conductive part 13. There is no need to add additional structures to improve the flatness of the first anode Ano1, thereby reducing the layout difficulty of the display substrate.

[0092] like Figures 13 to 16 As shown, in some embodiments, in the edge display area 302, the third conductive portion 21 includes a conductive main portion 210, and a first conductive extension portion 211, a second conductive extension portion 212 and a third conductive extension portion 213 respectively coupled to the conductive main portion 210;

[0093] The orthographic projection of the first anode Ano1 on the substrate at least partially overlaps with the orthographic projection of the conductive main body 210 on the substrate; and / or, the orthographic projection of the first anode Ano1 on the substrate at least partially overlaps with the orthographic projection of the first conductive extension portion 211 on the substrate; and / or, the orthographic projection of the first anode Ano1 on the substrate at least partially overlaps with the orthographic projection of the second conductive extension portion 212 on the substrate.

[0094] Exemplarily, the conductive main body 210 , the first conductive extension portion 211 , the second conductive extension portion 212 , and the third conductive extension portion 213 are formed into an integrated structure.

[0095] Exemplarily, the plurality of first sub-pixels include a plurality of red sub-pixels and a plurality of blue sub-pixels. The orthographic projection of the first anode Ano1 included in the red sub-pixel on the substrate at least partially overlaps with the orthographic projection of the conductive main body 210 on the substrate. The orthographic projection of the first anode Ano1 included in the red sub-pixel on the substrate at least partially overlaps with the orthographic projection of the first conductive extension 211 on the substrate.

[0096] Exemplarily, the orthographic projection of the first anode Ano1 included in the blue sub-pixel on the substrate substrate at least partially overlaps with the orthographic projection of the conductive main body 210 on the substrate substrate. The orthographic projection of the first anode Ano1 included in the blue sub-pixel on the substrate substrate at least partially overlaps with the orthographic projection of the first conductive extension 211 on the substrate substrate. The orthographic projection of the first anode Ano1 included in the blue sub-pixel on the substrate substrate at least partially overlaps with the orthographic projection of the second conductive extension 212 on the substrate substrate.

[0097] The third conductive portion 21 is configured as described above to include a conductive main body portion 210, and a first conductive extension portion 211, a second conductive extension portion 212 and a third conductive extension portion 213 respectively coupled to the conductive main body portion 210, so that the third conductive portion 21 is close to the layout structure of the second source-drain metal layer in the middle display area 301, which is beneficial to improving the uniformity of the display substrate.

[0098] like Fig. 9 , Fig.11 and Fig.12 As shown, in some embodiments, the plurality of sub-pixels include a plurality of first sub-pixels and a plurality of second sub-pixels, the plurality of first sub-pixels include a plurality of red sub-pixels and a plurality of blue sub-pixels, and the second sub-pixels include a green sub-pixel;

[0099] The first conductive layer further includes a sixth conductive portion 14, and the second conductive layer further includes a seventh conductive portion 23;

[0100] The second sub-pixel includes a second anode Ano2, the second anode Ano2 includes a second anode main portion and a second anode extension portion, the orthographic projection of the second anode main portion on the base substrate is located inside the orthographic projection of the sixth conductive portion 14 on the base substrate, and / or the orthographic projection of the second anode main portion on the base substrate is located inside the orthographic projection of the seventh conductive portion 23 on the base substrate.

[0101] Exemplarily, the sixth conductive portion 14 is provided in the same layer and with the same material as the third source-drain metal layer, and the seventh conductive portion 23 is provided in the same layer and with the same material as the second source-drain metal layer.

[0102] Exemplarily, the entity portion included in the power line VDD1 is multiplexed as the sixth conductive portion 14 , and the first compensation portion VDD21 is multiplexed as the seventh conductive portion 23 , but the present invention is not limited thereto.

[0103] The above-mentioned setting is that the orthographic projection of the main body of the second anode Ano2 on the base substrate is located inside the orthographic projection of the sixth conductive part 14 on the base substrate, and / or the orthographic projection of the main body of the second anode Ano2 on the base substrate is located inside the orthographic projection of the seventh conductive part 23 on the base substrate; so that the second anode Ano2 has a higher flatness, which effectively improves the display quality.

[0104] The specific structure of the sub-pixel driving circuit is varied. Taking the sub-pixel driving circuit adopting the 8T1C circuit structure as an example, the specific structure of the sub-pixel driving circuit is described in detail.

[0105] like Figures 1 to 12 As shown, the sub-pixel driving circuit includes a first transistor T1 to an eighth transistor T8 and a storage capacitor Cst.

[0106] A gate of the first transistor T1 is coupled to the corresponding second reset signal line Rst2 , a first electrode of the first transistor T1 is coupled to the first initialization signal line, and a second electrode of the first transistor T1 is coupled to the second electrode of the third transistor T3 .

[0107] The gate of the second transistor T2 is coupled to the corresponding first scan line G1, the first electrode of the second transistor T2 is coupled to the second electrode of the third transistor T3, and the second electrode of the second transistor T2 is coupled to the gate of the third transistor T3. The second transistor T2 includes an oxide transistor. The first scan line G1 includes a first scan layer G11 and a second scan layer G12.

[0108] A gate of the fourth transistor T4 is coupled to the corresponding second scan line G2 , a first electrode of the fourth transistor T4 is coupled to the corresponding data line DA, and a second electrode of the fourth transistor T4 is coupled to the first electrode of the third transistor T3 .

[0109] A gate of the fifth transistor T5 is coupled to the corresponding light emitting control signal line EM, a first electrode of the fifth transistor T5 is coupled to the power layer VDD, and a second electrode of the fifth transistor T5 is coupled to the first electrode of the third transistor.

[0110] The gate of the sixth transistor T6 is coupled to the corresponding light emitting control signal line EM, the first electrode of the sixth transistor T6 is coupled to the second electrode of the third transistor T3, the second electrode of the sixth transistor T6 is coupled to the anode of the light emitting element, and the cathode of the light emitting element receives the negative power signal VSS.

[0111] A gate of the seventh transistor T7 is coupled to the corresponding first reset signal line Rst1 , a first electrode of the seventh transistor T7 is coupled to the second initialization signal line, and a second electrode of the seventh transistor T7 is coupled to the anode of the light emitting element.

[0112] A gate of the eighth transistor T8 is coupled to the corresponding first reset signal line Rst1 , a first electrode of the eighth transistor T8 is coupled to the third initialization signal line Vinit3 , and a second electrode of the eighth transistor T8 is coupled to the first electrode of the third transistor T3 .

[0113] The first plate Cst1 of the storage capacitor Cst is multiplexed as the gate T3 - g of the third transistor T3 , and the second plate Cst2 of the storage capacitor Cst is coupled to the power layer VDD.

[0114] An embodiment of the present invention further provides a display device, comprising the display substrate provided by the above embodiment.

[0115] It should be noted that the display device can be any product or component with a display function, such as a television, a monitor, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device also includes a flexible circuit board, a printed circuit board and a backplane, etc.

[0116] In the display substrate provided in the above embodiment, the first conductive part and the second conductive part included in the first conductive layer located below the first anode and closest to the first anode can be distributed on both sides of the center line; the third conductive part and the fourth conductive part included in the second conductive layer located below the first anode and second closest to the first anode can be distributed on both sides of the center line; in this way, the first anode located below the parts on both sides of the center line all have the conductive part included in the first conductive layer, and / or all have the conductive part included in the second conductive layer, which minimizes the influence of the first conductive layer and the second conductive layer on the flatness of the first anode, improves the flatness of the first anode, thereby improving the problem of poor uniformity of image quality caused by poor flatness of the anode, ensuring the continuity and uniformity of brightness of the light-emitting element, and effectively improving the display quality. Moreover, in the above arrangement, the first conductive part and the second conductive part can be formed simultaneously with other structures included in the first conductive layer in the same patterning process, and the third conductive part and the fourth conductive part can be formed simultaneously with other structures included in the second conductive layer in the same patterning process, without adding additional patterning processes. At the same time, there is no need to increase the thickness of the organic insulating layer below the first anode, which is conducive to the thinning of the display substrate.

[0117] Therefore, when the display device provided by the embodiment of the present invention includes the above-mentioned display substrate, it also has the above-mentioned beneficial effects, which will not be described in detail here.

[0118] It should be noted that the signal line extends along the X direction means that the signal line includes a main part and a secondary part connected to the main part, the main part is a line, a line segment or a strip-shaped body, the main part extends along the X direction, and the length of the main part extending along the X direction is greater than the length of the secondary part extending along other directions.

[0119] It should be noted that the layout area occupied by each sub-pixel driving circuit may be an area that can accommodate the sub-pixel driving circuit. Exemplarily, the area may be a rectangular area, but is not limited thereto.

[0120] It should be noted that the "same layer" in the embodiment of the present invention may refer to a film layer on the same structural layer. Or, for example, a film layer on the same layer may be a film layer for forming a specific pattern formed by the same film forming process, and then the film layer is patterned by the same mask through a single composition process to form a layer structure. Depending on the specific pattern, a single composition process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous. These specific patterns may also be at different heights or have different thicknesses.

[0121] In the various method embodiments of the present invention, the serial numbers of the steps cannot be used to limit the sequence of the steps. For ordinary technicians in this field, without paying creative work, changes to the sequence of the steps are also within the protection scope of the present invention.

[0122] It should be noted that each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiment, since it is basically similar to the product embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the product embodiment.

[0123] Unless otherwise defined, the technical terms or scientific terms used in this disclosure should be understood by people with ordinary skills in the field to which the present invention belongs. "First", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect", "couple" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0124] It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “under” another element, it can be “directly on” or “under” the other element or intervening elements may be present.

[0125] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0126] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A display substrate, characterized in that: include: A base substrate and a plurality of sub-pixels arranged on the base substrate, wherein a first sub-pixel of the plurality of sub-pixels comprises a first anode; the display substrate further comprises a first conductive layer and a second conductive layer, wherein at least a portion of the second conductive layer is located between the first conductive layer and the base substrate; the first conductive layer comprises at least one first conductive portion and at least one second conductive portion; the second conductive layer comprises at least one third conductive portion and at least one fourth conductive portion; The orthographic projection of the first anode on the substrate has a first overlapping area with the orthographic projection of the at least one first conductive part on the substrate, and the orthographic projection of the first anode on the substrate has a second overlapping area with the orthographic projection of the at least one second conductive part on the substrate; the orthographic projection of the first anode on the substrate has a third overlapping area with the orthographic projection of the at least one third conductive part on the substrate, and the orthographic projection of the first anode on the substrate has a fourth overlapping area with the orthographic projection of the at least one fourth conductive part on the substrate; the first overlapping area at least partially overlaps with the third overlapping area, and the second overlapping area at least partially overlaps with the fourth overlapping area.

2. The display substrate according to claim 1, characterized in that: The first overlapping region and the second overlapping region are symmetrically arranged about a center line of the first anode; and / or the third overlapping region and the fourth overlapping region are symmetrically arranged about the center line.

3. The display substrate according to claim 1 or 2, characterized in that: The display substrate also includes a grid-shaped power layer, which includes multiple power lines and multiple power compensation lines, and the power lines are coupled to the power compensation lines; the power lines are multiplexed into the first conductive part and / or the second conductive part, and the power compensation lines are multiplexed into the third conductive part and / or the fourth conductive part.

4. The display substrate according to claim 3, characterized in that: The power compensation line includes a plurality of first compensation parts and a plurality of second compensation parts, the first compensation parts and the second compensation parts are arranged in different layers, the orthographic projection of the first compensation parts on the substrate and the orthographic projection of the second compensation parts on the substrate are alternately arranged along a first direction, and adjacent first compensation parts and second compensation parts are coupled; the first compensation part is reused as the third conductive part and / or the fourth conductive part, and at least part of the second compensation part is located between the first compensation part and the substrate.

5. The display substrate according to claim 4, characterized in that: The first compensation part includes a compensation main body and two compensation extension parts respectively coupled to the compensation main body, the two compensation extension parts are arranged along the first direction, the extension direction of the compensation extension part is the same as the extension direction of the center line of the first anode, and the compensation extension part is reused as the third conductive part and / or the fourth conductive part.

6. The display substrate according to claim 3, characterized in that: The display substrate further includes a plurality of data lines, and the data lines are multiplexed as the first conductive portion and / or the second conductive portion.

7. The display substrate according to claim 6, characterized in that: The first conductive layer further includes a fifth conductive portion, and an orthographic projection of the fifth conductive portion on the base substrate covers an orthographic projection of a center line of the first anode on the base substrate.

8. The display substrate according to claim 7, characterized in that: The display substrate includes a display area, and the display area includes a central display area and an edge display area; in the central display area, the display substrate also includes a data transfer line, and the data transfer line is coupled to the corresponding data line, and the data transfer line extends from the display area to a peripheral area located around the display area; the data transfer line is multiplexed as the fifth conductive part.

9. The display substrate according to claim 7, characterized in that: The display substrate includes a display area, and the display area includes a central display area and an edge display area; the display substrate also includes a compensation adapter line; in the edge display area, the power line and the data line are multiplexed as the second conductive part, and the compensation adapter line is multiplexed as the fifth conductive part.

10. The display substrate according to claim 9, characterized in that: The first conductive portion is coupled to the compensation adapter line; and / or the third conductive portion is coupled to the compensation adapter line.

11. The display substrate according to claim 10, characterized in that: In the edge display area, the third conductive portion includes a conductive main portion, and a first conductive extension portion, a second conductive extension portion and a third conductive extension portion respectively coupled to the conductive main portion; The orthographic projection of the first anode on the substrate at least partially overlaps with the orthographic projection of the conductive body on the substrate; and / or, an orthographic projection of the first anode on the substrate at least partially overlaps with an orthographic projection of the first conductive extension on the substrate; And / or, an orthographic projection of the first anode on the substrate at least partially overlaps with an orthographic projection of the second conductive extension on the substrate.

12. The display substrate according to claim 1, characterized in that: The plurality of sub-pixels include a plurality of first sub-pixels and a plurality of second sub-pixels, the plurality of first sub-pixels include a plurality of red sub-pixels and a plurality of blue sub-pixels, and the second sub-pixels include a green sub-pixel; The first conductive layer further includes a sixth conductive portion, and the second conductive layer further includes a seventh conductive portion; The second sub-pixel includes a second anode, and the second anode includes a second anode main portion and a second anode extension portion, the orthographic projection of the second anode main portion on the base substrate is located inside the orthographic projection of the sixth conductive portion on the base substrate, and / or the orthographic projection of the second anode main portion on the base substrate is located inside the orthographic projection of the seventh conductive portion on the base substrate.

13. The display substrate according to claim 1, characterized in that: The display substrate includes a first source-drain metal layer, a second source-drain metal layer and a third source-drain metal layer stacked in sequence in a direction away from the base substrate; the first conductive layer includes the third source-drain metal layer, and the second conductive layer includes the second source-drain metal layer.

14. A display device, characterized in that: The invention comprises the display substrate according to any one of claims 1 to 13.

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