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 uniformity of signal transmission of a signal transmission layer in a display product. The display substrate comprises a signal transmission layer, at least two signal transfer layers arranged in a stacked mode and a first signal end. The at least two signal transfer layers comprise a first signal transfer layer and a second signal transfer layer, the first signal transfer layer is coupled with the signal transmission layer, and the second signal transfer layer is coupled with the first signal end; a first contact area is arranged between the signal transmission layer and the first signal transfer layer; the first signal transfer layer comprises a first part, the second signal transfer layer comprises a second part, and a transfer area is formed between the second part and the first part; the first part is coupled with the second part in the switching area; the orthographic projection of the switching region on the substrate is at least partially overlapped with the orthographic projection of the first contact region on the substrate.

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, there are more and more types of display products and their application fields are becoming more and more extensive. In order to meet the needs of different application scenarios, the sizes of display products are becoming more and more diverse. For large-size display products, the uniformity of the signal transmission of the large-area signal transmission layer in the display product is more sensitive. Therefore, how to improve the uniformity of the signal transmission of the signal transmission layer in the display product 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 uniformity of signal transmission of a signal transmission layer 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 display area and a peripheral area located around the display area; the display substrate further comprises:

[0006] a signal transmission layer, the signal transmission layer extending from the display area to the peripheral area;

[0007] At least two stacked signal transfer layers and a first signal end; the signal transfer layers and the first signal end are both located in the peripheral area;

[0008] Among the at least two signal transfer layers, adjacent signal transfer layers are coupled; the at least two signal transfer layers include a first signal transfer layer and a second signal transfer layer, at least a portion of the second signal transfer layer is located between the first signal transfer layer and the base substrate of the display substrate, the second signal transfer layer is coupled to the first signal end, and the first signal transfer layer is coupled to the signal transmission layer;

[0009] There is a first contact area between the signal transmission layer and the first signal transfer layer; the first signal transfer layer includes a first part, the second signal transfer layer includes a second part, a transfer area is formed between the second part and the first part, and the first part is coupled to the second part in the transfer area; the orthographic projection of the transfer area on the base substrate at least partially overlaps with the orthographic projection of the first contact area on the base substrate.

[0010] Optionally, the first portion is located on a surface of the second portion facing away from the substrate; or, the first portion is connected in parallel with the second portion.

[0011] Optionally, the first part and the second part are directly overlapped.

[0012] Optionally, the display substrate includes an insulating layer, and the insulating layer is located between the first signal switching layer and the second signal switching layer;

[0013] The insulating layer has a first via hole, the first part is located in the first via hole, and the first part and the second part are in contact with the surface facing away from the substrate; or, the insulating layer has at least two second via holes, and the first part and the second part are connected in parallel through the at least two second via holes.

[0014] Optionally, the signal transmission layer includes a cathode layer; the display substrate also includes an anode layer, and the first signal transfer layer is provided in the same layer and with the same material as the anode layer.

[0015] Optionally, the peripheral area includes a lower frame area; and the display substrate further includes:

[0016] A power connection line and at least two power signal input terminals, wherein the at least two power signal input terminals and the power connection line are both located in the lower frame area;

[0017] A plurality of power lines, wherein the power lines are located in the display area;

[0018] The power connection line is coupled to the multiple power lines respectively, and at least a part of the orthographic projection of the power connection line on the substrate is located between the orthographic projection of the first signal transfer layer on the substrate and the display area; the power connection line is also coupled to the at least two power signal input terminals respectively, and the at least two power signal input terminals are located on the side of the power connection line away from the display area.

[0019] Optionally, the first signal transfer layer surrounds the display area.

[0020] Optionally, the at least two signal transfer layers further include a third signal transfer layer, at least a portion of the third signal transfer layer is located between the second signal transfer layer and the base substrate, and the second signal transfer layer is coupled to the first signal end through the third signal transfer layer.

[0021] Optionally, the display substrate includes a first metal layer and a second metal layer stacked in sequence in a direction away from the base substrate; the second signal transfer layer is located in the second metal layer, and the third signal transfer layer is located in the first metal layer.

[0022] Optionally, the at least two signal transfer layers also include a third signal transfer layer and a fourth signal transfer layer. Along the direction away from the base substrate, the fourth signal transfer layer, the third signal transfer layer and the second signal transfer layer are stacked in sequence; the second signal transfer layer is coupled to the first signal end through the third signal transfer layer and the fourth signal transfer layer in sequence.

[0023] Optionally, the display substrate includes a first metal layer, a second metal layer and a third metal layer stacked in sequence in a direction away from the base substrate; the second signal transfer layer is located on the third metal layer, the third signal transfer layer is located on the second metal layer, and the fourth signal transfer layer is located on the first metal layer.

[0024] Optionally, the second signal transfer layer surrounds the display area.

[0025] Optionally, the power connection line includes a connection main body portion and a connection protrusion portion coupled to each other, the connection main body portion is located between the connection protrusion portion and the display area, the connection main body portion is coupled to the plurality of power lines respectively, and the connection protrusion portion is coupled to the power signal input terminal;

[0026] At least a portion of the orthographic projection of the connecting body portion on the base substrate is located between the orthographic projection of the first signal transfer layer on the base substrate and the display area; the orthographic projection of the connecting protrusion on the base substrate at least partially overlaps with the orthographic projection of the first signal transfer layer on the base substrate; and / or the orthographic projection of the connecting protrusion on the base substrate at least partially overlaps with the orthographic projection of the second signal transfer layer on the base substrate.

[0027] Optionally, the display substrate further includes a first metal layer, and the second signal transfer layer is located on the first metal layer.

[0028] Optionally, the power connection line includes a connection main body portion and a connection protrusion portion coupled to each other, the connection main body portion is located between the connection protrusion portion and the display area, the connection main body portion is coupled to the plurality of power lines respectively, and the connection protrusion portion is coupled to the power signal input terminal;

[0029] At least part of the orthographic projection of the connecting body on the base substrate is located between the orthographic projection of the first signal conversion layer on the base substrate and the display area; the orthographic projection of the connecting protrusion on the base substrate does not overlap with the orthographic projection of the first signal conversion layer on the base substrate; and / or the orthographic projection of the connecting protrusion on the base substrate does not overlap with the orthographic projection of the second signal conversion layer on the base substrate; the power connection line is provided on the same layer and with the same material as the second signal conversion layer.

[0030] Optionally, the first signal transfer layer is arranged around the display area and forms at least one first opening area in the lower frame area, and the connecting protrusion is located in the corresponding first opening area; and / or, the second signal transfer layer is arranged around the display area and forms at least one second opening area in the lower frame area, and the connecting protrusion is located in the corresponding second opening area.

[0031] Optionally, the display substrate includes at least two power signal input terminals and at least two first signal terminals; the at least two power signal input terminals are divided into at least one power terminal group, the power terminal group includes two power signal input terminals arranged along a first direction; the at least two first signal terminals are divided into at least one first terminal group, the first terminal group includes two first signal terminals arranged along a first direction; the orthographic projection of the power terminal group on the base substrate is located between the orthographic projections of the two first signal terminals in the corresponding first terminal group on the base substrate.

[0032] Optionally, the power connection line includes a connecting body portion and at least one connecting protrusion, the connecting body portion is respectively coupled to each of the connecting protrusions, the connecting body portion is located between the connecting protrusions and the display area, the connecting body portion is respectively coupled to the multiple power lines, the connecting protrusions correspond one-to-one to the power terminal groups, and the connecting protrusions are respectively coupled to each power signal input terminal in the corresponding power terminal group.

[0033] Optionally, the peripheral area includes a first binding area and a second binding area; the first binding area is located between the second binding area and the display area; the display substrate further includes a flexible circuit board and at least one driver chip, the at least one driver chip is bound to the first binding area, and the flexible circuit board is bound to the second binding area;

[0034] The flexible circuit board is respectively coupled to each of the power signal input terminals and each of the first signal terminals; each of the power signal input terminals and each of the first signal terminals are both located between the second bonding region and the display region, and the orthographic projection of the first bonding region on the substrate is located between the orthographic projections of two power signal input terminals in the corresponding power terminal group on the substrate.

[0035] A second aspect of the present invention provides a display substrate, including a display region and a peripheral region located around the display region; the display substrate further includes:

[0036] A signal transmission layer, which extends from the display region to the peripheral region;

[0037] At least two layers of signal transfer layers stacked, and a first signal terminal; both the signal transfer layer and the first signal terminal are located in the peripheral region;

[0038] Among the at least two layers of signal transfer layers, adjacent signal transfer layers are coupled; the at least two layers of signal transfer layers include a first layer signal transfer layer and a second layer signal transfer layer, at least a part of the second layer signal transfer layer is located between the first layer signal transfer layer and the substrate of the display substrate, the second layer signal transfer layer is coupled to the first signal terminal, and the first layer signal transfer layer is coupled to the signal transmission layer;

[0039] A first transfer region is formed between the signal transmission layer and the first layer signal transfer layer, the first transfer region includes a plurality of sub-regions arranged in sequence along the direction from the display region to the peripheral region, and in the sub-regions, the signal transmission layer is coupled to the first layer signal transfer layer;

[0040] The first layer signal transfer layer includes a first part, the second layer signal transfer layer includes a second part, a second transfer region is formed between the second part and the first part, and in the second transfer region, the first part is coupled to the second part; the orthographic projection of the sub-region closest to the display region on the substrate at least partially overlaps with the orthographic projection of the first contact region on the substrate; the orthographic projection of the sub-region farthest from the display region on the substrate at least partially overlaps with the orthographic projection of the first contact region on the substrate.

[0041] Based on the technical solution of the above display substrate, a third aspect of the present invention provides a display device, including the above display substrate.

[0042] In the technical solution provided by the present invention, the signal transmission layer is electrically connected to the first signal end through the first signal switching layer and the second signal switching layer in sequence. When the first signal switching layer and the second signal switching layer transmit signals between the signal transmission layer and the first signal end, the second part and the first part jointly realize signal transmission. By coupling the signal transmission layer with the first signal switching layer, the first signal switching layer can be electrically connected to the signal transmission layer in multiple border areas, so that the signal can be transmitted between the signal transmission layer and the signal switching layer from multiple directions, thereby better improving the uniformity of signal transmission of the signal transmission layer in the display product, and enhancing the stability of the display effect of the display substrate and the uniformity of the display quality.

[0043] In the technical solution provided by the present invention, since the signal is transmitted to the signal transmission layer through the second part and the first part at the same time, the signal realizes multi-layer simultaneous transmission when passing through the first signal switching layer. In this way, even if the thickness of the first signal switching layer is relatively thin, it can ensure that the first signal switching layer is not burned by the current during the transmission of the signal, thereby well ensuring the use yield of the display substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 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:

[0045] Figure 1 A schematic diagram of the overall structure of a signal transmission layer and a signal switching layer in a display substrate provided by an embodiment of the present invention;

[0046] Figure 2 A schematic diagram of a layout of a lower frame area of ​​a display substrate provided in an embodiment of the present invention;

[0047] Figure 3 for Figure 2 A schematic diagram showing the layout of the structure in the display area with the cathode layer removed;

[0048] Figure 4 for Figure 3 A schematic diagram of a layout in which the first and second signal transfer layers are removed;

[0049] Figure 5 for Figure 2 Schematic diagram of the cross section along the E1E2 direction;

[0050] Figure 6 A schematic diagram of a connection between various signal switching layers provided in an embodiment of the present invention;

[0051] Figure 7 A schematic diagram of a connection between various signal switching layers provided in an embodiment of the present invention;

[0052] Figure 8 A schematic diagram of a layout of a lower frame area of ​​a display substrate provided in an embodiment of the present invention;

[0053] Fig. 9 for Figure 8 A schematic diagram showing the layout of the structure in the display area with the cathode layer removed;

[0054] Fig.10 for Fig. 9 A schematic diagram of a layout in which the first and second signal transfer layers are removed;

[0055] Fig.11 for Figure 8 Schematic diagram of the cross section along the D1D2 direction;

[0056] Fig.12 A schematic diagram of a connection between various signal switching layers provided in an embodiment of the present invention;

[0057] Fig.13 A schematic diagram of a connection between various signal switching layers provided in an embodiment of the present invention;

[0058] Fig.14 A schematic diagram of a layout of a lower frame area of ​​a display substrate provided in an embodiment of the present invention;

[0059] Fig.15 for Fig.14 A schematic diagram showing the layout of the structure in the display area with the cathode layer removed;

[0060] Fig.16 for Fig.14 Schematic diagram of the layout of the first and second signal transfer layers;

[0061] Fig.17 for Fig.14 Schematic diagram of the cross section along the E1E2 direction;

[0062] Fig.18 A schematic diagram of a connection between various signal switching layers provided in an embodiment of the present invention;

[0063] Fig.19 A schematic diagram of a connection between various signal switching layers provided in an embodiment of the present invention;

[0064] Fig. 20 A schematic cross-sectional view of a display substrate provided by an embodiment of the present invention;

[0065] Fig.21 Another cross-sectional schematic diagram of a display substrate provided by an embodiment of the present invention;

[0066] Fig. 22 for Figure 2 Schematic diagram of the cross section along the F1F2 direction. DETAILED DESCRIPTION

[0067] 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.

[0068] See also Figure 1 , Figure 2 , Figures 5 to 8 , Figures 11 to 14 , Figures 11 to 19 , an embodiment of the present invention provides a display substrate, comprising a display area AA and a peripheral area located around the display area AA; the display substrate further comprises: a signal transmission layer 20, at least two stacked signal transfer layers 30, and a first signal terminal VSS; the signal transmission layer 20 extends from the display area AA to the peripheral area; the signal transfer layer and the first signal terminal VSS are both located in the peripheral area;

[0069] In the at least two signal transfer layers 30, adjacent signal transfer layers 30 are coupled; the at least two signal transfer layers 30 include a first signal transfer layer 301 and a second signal transfer layer 302, at least part of the second signal transfer layer 302 is located between the first signal transfer layer 301 and the base substrate 70 of the display substrate, the first signal transfer layer 301 is coupled to the signal transmission layer 20, and the second signal transfer layer 302 is coupled to the first signal terminal VSS;

[0070] There is a first contact area J1 between the signal transmission layer 20 and the first signal transfer layer 301; the first signal transfer layer 301 includes a first part L1, the second signal transfer layer 302 includes a second part L2, and a transfer area SL is formed between the second part L2 and the first part L1; in the transfer area SL, the first part L1 is coupled to the second part L2; the orthographic projection of the transfer area SL on the substrate at least partially overlaps with the orthographic projection of the first contact area J1 on the substrate.

[0071] Exemplarily, the display substrate includes a display area AA and a peripheral area. The peripheral area surrounds the display area AA. For example, the display area AA includes a rectangular display area AA, and the peripheral area includes an upper frame area, a lower frame area, a left frame area, and a right frame area. The driver chip IC included in the display substrate is located in the lower frame area.

[0072] Exemplarily, the display substrate includes a plurality of sub-pixels, the plurality of sub-pixels are located in the display area AA, and the plurality of sub-pixel driving circuits included in the plurality of sub-pixels are distributed in an array. The plurality of sub-pixel driving circuits are divided into a plurality of rows of sub-pixel driving circuits and a plurality of columns of sub-pixel driving circuits. The plurality of rows of sub-pixel driving circuits are arranged along a second direction, and each row of sub-pixel driving circuits includes a plurality of sub-pixel driving circuits arranged along a first direction. The plurality of columns of sub-pixel driving circuits are arranged along a first direction, and each column of sub-pixel driving circuits includes a plurality of sub-pixel driving circuits arranged along a second direction. Exemplarily, the first direction and the second direction intersect. For example: the first direction includes a transverse direction, and the second direction includes a longitudinal direction.

[0073] Exemplarily, the sub-pixel includes a sub-pixel driving circuit and a light-emitting element. The sub-pixel driving circuit is coupled to the anode of the light-emitting element, and is used to provide a driving signal to the light-emitting element to drive the light-emitting element to emit light. The light-emitting element includes an anode and a light-emitting functional layer, and the anode is located between the light-emitting functional layer and the base substrate. The display substrate also includes a cathode layer, and the cathode layer is located on the side of the light-emitting functional layer facing away from the base substrate. The cathode layer can be formed into a whole layer structure that can cover the entire display area AA. The light-emitting functional layer can emit light under the action of the electric field formed by the anode and the cathode layer, thereby realizing the light-emitting function of the sub-pixel.

[0074] Exemplarily, the display substrate further includes a signal transmission layer 20, and the signal transmission layer 20 has a larger area. For example, the signal transmission layer 20 can extend from the upper boundary of the display area AA to the lower boundary of the display area AA; and / or, the signal transmission layer 20 can extend from the left boundary of the display area AA to the right boundary of the display area AA. The signal transmission layer 20 can include a longer signal line, or a transmission layer on the entire surface, but is not limited thereto.

[0075] Exemplarily, the display substrate further includes at least two signal transfer layers, and each signal transfer layer is arranged in different layers, but is not limited thereto. The display substrate further includes at least one first signal terminal VSS, and the first signal terminal VSS is used to transmit a first signal, and the first signal is transmitted between the signal transmission layer 20 and the first signal terminal VSS through each signal transfer layer.

[0076] Exemplarily, the at least two signal transfer layers include a first signal transfer layer 301 and a second signal transfer layer 302, the first signal transfer layer 301 is directly or indirectly coupled to the signal transmission layer 20, and the second signal transfer layer 302 is directly or indirectly coupled to the first signal terminal VSS.

[0077] Exemplarily, a first contact region J1 is provided between the signal transmission layer 20 and the first signal transfer layer 301 , and the signal transmission layer 20 and the first signal transfer layer 301 are electrically connected in the first contact region J1 .

[0078] Exemplarily, the first signal transfer layer 301 includes a first portion L1, the second signal transfer layer 302 includes a second portion L2, and the first signal is transmitted along the first portion L1 and the second portion L2, but not limited thereto. For example: the first portion L1 surrounds the display area AA or at least partially surrounds the display area AA; the second portion L2 surrounds the display area AA or at least partially surrounds the display area AA, but not limited thereto.

[0079] Exemplarily, the second signal transfer layer 302 and the conductive film layer thereunder form a second contact region, and the first contact region J1 does not overlap with the second contact region. For example, the first contact region J1 is located between the display region and the second contact region, but is not limited thereto.

[0080] According to the specific structure of the above-mentioned display substrate, the display substrate provided in the embodiment of the present invention includes a signal transmission layer 20, at least two stacked signal transfer layers 30, and a first signal terminal VSS; the at least two signal transfer layers 30 include a first signal transfer layer 301 and a second signal transfer layer 302, the first signal transfer layer 301 is coupled to the signal transmission layer 20, and the second signal transfer layer 302 is coupled to the first signal terminal VSS; there is a first contact area J1 between the signal transmission layer 20 and the first signal transfer layer 301; the first signal transfer layer 301 includes a first part L1, the second signal transfer layer 302 includes a second part L2, and the second part L2 and the first part L1 form a transfer area SL; the orthographic projection of the transfer area SL on the base substrate at least partially overlaps with the orthographic projection of the first contact area J1 on the base substrate.

[0081] In the display substrate provided by the embodiment of the present invention, the signal transmission layer 20 is electrically connected to the first signal terminal VSS through the first signal transfer layer 301 and the second signal transfer layer 302 in sequence. When the first signal transfer layer 301 and the second signal transfer layer 302 transmit signals between the signal transmission layer 20 and the first signal terminal VSS, the second part L2 and the first part L1 jointly realize signal transmission. By coupling the signal transmission layer 20 with the first signal transfer layer 301, the first signal transfer layer 301 can be electrically connected to the signal transmission layer 20 in multiple border areas, so that the signal can be transmitted between the signal transmission layer and the signal transfer layer from multiple directions, thereby better improving the uniformity of signal transmission by the signal transmission layer 20 in the display product, and enhancing the stability of the display effect of the display substrate and the uniformity of the display quality.

[0082] In the display substrate provided by the embodiment of the present invention, since the signal is transmitted to the signal transmission layer 20 through the second part L2 and the first part L1 at the same time, the signal realizes multi-layer simultaneous transmission when passing through the first signal transfer layer 301. In this way, even if the thickness of the first signal transfer layer 301 is relatively thin, it can avoid excessive loading, ensuring that the first signal transfer layer 301 is not burned by the current during the transmission of the signal, thereby well ensuring the use yield of the display substrate.

[0083] In some embodiments, Figure 6 to Figure 7 , Figure 12 to Figure 13 , Figure 18 to Figure 19 As shown, the first portion L1 is located on the surface of the second portion L2 facing away from the substrate; or Figure 5 , Fig.11 and Fig.17 As shown, the first part L1 is connected in parallel with the second part L2.

[0084] like Figure 6 , Fig.12 and Fig.18 As shown, exemplarily, the first portion L1 and the second portion L2 are directly overlapped. The overlap area between the first portion L1 and the second portion L2 surrounds the display area AA; or the overlap area between the first portion L1 and the second portion L2 at least partially surrounds the display area AA.

[0085] like Figure 7 , Fig.13 and Fig.19As shown, exemplarily, the display substrate includes an insulating layer, the insulating layer is located between the first signal transfer layer 301 and the second signal transfer layer 302; the insulating layer has a first via hole Via1, the first portion L1 is located in the first via hole Via1, and the first portion L1 and the second portion L2 are in contact with the surface facing away from the base substrate. Exemplarily, the first via hole Via1 surrounds the display area AA; or the first via hole Via1 at least partially surrounds the display area AA.

[0086] like Figure 5 , Fig.11 and Fig.17 As shown, exemplarily, the display substrate includes an insulating layer, the insulating layer is located between the first signal transfer layer 301 and the second signal transfer layer 302; the insulating layer has at least two second via holes Via2, and the first portion L1 and the second portion L2 are connected in parallel through the at least two second via holes Via2. Exemplarily, the second via hole Via2 surrounds the display area AA; or the second via hole Via2 at least partially surrounds the display area AA.

[0087] In the display substrate provided in the above embodiments, the transfer area SL can be formed by the above-mentioned multiple methods to realize that the signal can be transmitted in multiple layers simultaneously when passing through the first signal transfer layer 301. In this way, even if the thickness of the first signal transfer layer 301 is relatively thin, it can be ensured that the first signal transfer layer 301 is not burned by the current during the transmission of the signal, thereby well ensuring the use yield of the display substrate.

[0088] like Figure 1 , Figure 2 , Figure 8 and Fig.14 As shown, in some embodiments, the signal transmission layer 20 includes a cathode layer Cath; the display substrate also includes an anode layer, and the first signal transfer layer 301 is provided in the same layer and material as the anode layer.

[0089] By setting the first signal transfer layer 301 and the anode layer to be of the same layer and material, the first signal transfer layer 301 and the anode layer can be formed simultaneously in the same patterning process, avoiding the addition of an additional patterning process specifically for making the first signal transfer layer 301, thereby effectively simplifying the manufacturing process of the display substrate and reducing the manufacturing cost of the display substrate.

[0090] The signal transmission layer 20 is configured to include a cathode layer Cath, so that the cathode layer Cath can transmit cathode current from multiple directions to the first signal switching layer 301, thereby better improving the uniformity of cathode current transmission by the cathode layer Cath in the display product. Exemplarily, the cathode layer Cath can transmit cathode current in the upper frame area, the lower frame area, the left frame area, and the right frame area to the first signal switching layer 301, but is not limited thereto.

[0091] Since the thickness of the anode layer is relatively thin, the first signal transfer layer 301 is provided with the same layer and the same material as the anode layer, so that the first signal transfer layer 301 has a relatively thin thickness. Since the cathode current is transmitted simultaneously in the transfer area SL through the first part L1 and the second part L2 when flowing through the first signal transfer layer 301, the cathode current is transmitted simultaneously in multiple layers when passing through the first signal transfer layer 301, so that even if the thickness of the first signal transfer layer 301 is relatively thin, it can be ensured that the first signal transfer layer 301 is not burned by the current during the transmission of the cathode current, thereby ensuring the use yield of the display substrate well.

[0092] like Figure 2 and Figure 8 As shown, in some embodiments, the peripheral area includes a lower frame area; the display substrate further includes a power connection line 40, at least two power signal input terminals VDD and a plurality of power lines 41, the power line 41 extends from the display area AA to the lower frame area, and the at least two power signal input terminals VDD and the power connection line 40 are both located in the lower frame area;

[0093] The power connection line 40 is coupled to the multiple power lines 41 respectively, and at least part of the orthographic projection of the power connection line 40 on the substrate is located between the orthographic projection of the first signal transfer layer 301 on the substrate and the display area AA; the power connection line 40 is also coupled to the at least two power signal input terminals VDD respectively, and the at least two power signal input terminals VDD are located on the side of the power connection line 40 away from the display area AA.

[0094] Exemplarily, the power line 41 is located in the display area, but is not limited thereto.

[0095] Exemplarily, at least a portion of the orthographic projection of the power connection line 40 on the base substrate and the orthographic projection of the first signal transfer layer 301 on the base substrate are arranged in sequence in a direction away from the display area AA.

[0096] Exemplarily, the plurality of power lines 41 are arranged along the first direction, and the power lines 41 include at least a portion extending along the second direction. The power lines 41 are respectively coupled to each sub-pixel driving circuit in a corresponding column of sub-pixel driving circuits. Exemplarily, the power connection line 40 includes at least a portion extending along the first direction, and the power connection line 40 is respectively coupled to the plurality of power lines 41.

[0097] Exemplarily, the orthographic projection of the power connection line 40 on the substrate substrate at least partially overlaps with the orthographic projection of the first signal switching layer 301 on the substrate substrate; and / or, the orthographic projection of the power connection line 40 on the substrate substrate at least partially overlaps with the orthographic projection of the second signal switching layer 302 on the substrate substrate; and / or, the orthographic projection of the power connection line 40 on the substrate substrate at least partially overlaps with the orthographic projection of the signal transmission layer 20 on the substrate substrate.

[0098] like Figure 1 As shown, in some embodiments, the first signal transfer layer 301 surrounds the display area AA.

[0099] By setting the first signal transfer layer 301 to surround the display area AA, the electrical connection between the first signal transfer layer 301 and the signal transmission layer 20 can be achieved in multiple border areas, so that the signal can be transmitted between the signal transmission layer 20 and the signal transfer layer 30 from multiple directions, which increases the transmission path of the signal when it is transmitted between the signal transmission layer 20 and the signal transfer layer 30, thereby better improving the uniformity of the signal transmission of the signal transmission layer 20 in the display product.

[0100] like Figure 1 As shown, in some embodiments, the second signal transfer layer 302 surrounds the display area AA.

[0101] By setting the second signal transfer layer 302 to surround the display area AA, the electrical connection between the first signal transfer layer 301 and the second signal transfer layer 302 can be achieved in multiple border areas, so that the signal can be transmitted between the second signal transfer layer 302 and the first signal transfer layer 301 from multiple directions, and the transmission can be achieved through the first part L1 and the second part L2 in multiple directions at the same time, thereby ensuring the reliability while better balancing the current density on the signal transmission layer 20, thereby improving the uniformity of the signal transmission layer 20 in the display product.

[0102] In some embodiments, the transfer area SL is set to surround the display area AA, so that when the signal is transmitted in multiple directions between the second signal transfer layer 302 and the signal transmission layer 20, it can be transmitted through the first part L1 and the second part L2 at the same time, thereby ensuring the yield of the display substrate.

[0103] Exemplarily, taking the case where the display area AA includes a rectangular display area AA, and the surrounding areas include an upper frame area, a lower frame area, a left frame area, and a right frame area, the multiple directions mentioned above may include a transmission direction from the upper frame area to the display area AA, a transmission direction from the lower frame area to the display area AA, a transmission direction from the left frame area to the display area AA, and a transmission direction from the right frame area to the display area AA, but are not limited to this.

[0104] Exemplarily, taking the case where the display area AA includes a rectangular display area AA, and the surrounding areas include an upper frame area, a lower frame area, a left frame area, and a right frame area, the multiple directions mentioned above may include a transmission direction from the display area AA to the upper frame area, a transmission direction from the display area AA to the lower frame area, a transmission direction from the display area AA to the left frame area, and a transmission direction from the display area AA to the right frame area, but is not limited to this.

[0105] like Fig. 22 As shown, the connection relationship between the signal transmission layer 20, the first signal switching layer 301 and the second signal switching layer 302 in the left frame area is illustrated. Fig. 22 The symbol 80 shown in the figure represents all the film layers below the second signal transfer layer 302 .

[0106] like Figures 8 to 13 As shown, in some embodiments, the at least two signal transfer layers also include a third signal transfer layer 303, at least a portion of the third signal transfer layer 303 is located between the second signal transfer layer 302 and the substrate, and the second signal transfer layer 302 is coupled to the first signal terminal VSS through the third signal transfer layer 303.

[0107] Exemplarily, the display substrate includes a first metal layer and a second metal layer stacked in sequence in a direction away from the base substrate; the second signal transfer layer 302 is located in the second metal layer, and the third signal transfer layer 303 is located in the first metal layer.

[0108] like Fig. 20As shown, exemplarily, the display substrate includes a buffer layer BF, an active layer poly, a first gate insulating layer GI1, a first gate metal layer gate1, a second gate insulating layer GI2, a second gate metal layer gate2, an interlayer insulating layer ILD, a first source-drain metal layer SD1, a first flat layer PLN1, a second source-drain metal layer SD2, a second flat layer PLN2, an anode layer ANO, a pixel defining layer PDL, a light-emitting functional layer EL, a cathode layer Cath, a first inorganic encapsulation layer CVD1, an organic encapsulation layer IJP, and a second inorganic encapsulation layer CVD2, etc., which are sequentially stacked in a direction away from the base substrate 70. The display substrate may also include a passivation layer PVX, but is not limited to it.

[0109] Exemplarily, the first metal layer includes the first source-drain metal layer SD1 , and the second metal layer includes the second source-drain metal layer SD2 , but is not limited thereto.

[0110] Exemplarily, the first source-drain metal layer SD1 and / or the second source-drain metal layer SD2 includes a stacked Ti / Al / Ti structure, but is not limited thereto.

[0111] Exemplarily, the first source-drain metal layer SD1 is used to form the source and drain of the transistor structure included in the display substrate. The first source-drain metal layer SD1 and / or the second source-drain metal layer SD2 can also be used to form conductive connection parts, signal lines, etc., but are not limited thereto.

[0112] like Figures 2 to 7 As shown, in some embodiments, the at least two signal transfer layers also include a third signal transfer layer 303 and a fourth signal transfer layer 304. Along the direction away from the base substrate, the fourth signal transfer layer 304, the third signal transfer layer 303 and the second signal transfer layer 302 are stacked in sequence; the second signal transfer layer 302 is coupled to the first signal terminal VSS through the third signal transfer layer 303 and the fourth signal transfer layer 304 in sequence.

[0113] Exemplarily, the display substrate includes a first metal layer, a second metal layer and a third metal layer stacked in sequence in a direction away from the base substrate; the second signal transfer layer 302 is located in the third metal layer, the third signal transfer layer 303 is located in the second metal layer, and the fourth signal transfer layer 304 is located in the first metal layer.

[0114] like Fig.21As shown, exemplarily, the display substrate includes a buffer layer BF, a first active layer poly, a first gate insulating layer GI1, a first gate metal layer gate1, a second gate insulating layer GI2, a second gate metal layer gate2, a third gate insulating layer GI3, a second active layer ACT, a fourth gate insulating layer GI4, a third gate metal layer gate3, an interlayer insulating layer ILD, a first source-drain metal layer SD1, a passivation layer PVX, a first flat layer PLN1, a second source-drain metal layer SD2, a second flat layer PLN2, a third source-drain metal layer SD3, a third flat layer PLN3, an anode layer ANO, a pixel defining layer PDL, a light emitting functional layer EL, a cathode layer Cath, a first inorganic encapsulation layer CVD1, an organic encapsulation layer IJP, and a second inorganic encapsulation layer CVD2, which are sequentially stacked in a direction away from the base substrate 70. The display substrate may also include a light shielding layer, which is located between the first active layer poly and the base substrate 70.

[0115] Exemplarily, the first metal layer includes the first source-drain metal layer SD1 , the second metal layer includes the second source-drain metal layer SD2 , and the third metal layer includes the third source-drain metal layer SD3 , but is not limited thereto.

[0116] Exemplarily, the first source-drain metal layer SD1, the second source-drain metal layer SD2 and / or the third source-drain metal layer SD3 include a stacked Ti / Al / Ti structure, but is not limited thereto.

[0117] Exemplarily, the first source-drain metal layer SD1 is used to form the source and drain of the transistor structure included in the display substrate. The first source-drain metal layer SD1, the second source-drain metal layer SD2 and / or the third source-drain metal layer SD3 can also be used to form a conductive connection portion, a signal line, etc., but are not limited thereto.

[0118] like Figure 2 and Figure 8 As shown, in some embodiments, the power connection line 40 includes a connection main body portion 401 and a connection protrusion portion 402 coupled to each other, the connection main body portion 401 is located between the connection protrusion portion 402 and the display area AA, the connection main body portion 401 is coupled to the plurality of power lines 41 respectively, and the connection protrusion portion 402 is coupled to the power signal input terminal VDD;

[0119] At least a portion of the orthographic projection of the connecting main body portion 401 on the base substrate is located between the orthographic projection of the first signal transfer layer 301 on the base substrate and the display area AA; the orthographic projection of the connecting protrusion 402 on the base substrate at least partially overlaps with the orthographic projection of the first signal transfer layer 301 on the base substrate; and / or the orthographic projection of the connecting protrusion 402 on the base substrate at least partially overlaps with the orthographic projection of the second signal transfer layer 302 on the base substrate.

[0120] like Figure 5 As shown, exemplarily, in the case where the display substrate includes the first source-drain metal layer SD1, the second source-drain metal layer SD2 and the third source-drain metal layer SD3, the power connection line 40 includes a stacked double-layer structure, one layer of the double-layer structure is arranged in the same layer and material as the first source-drain metal layer SD1, and the other layer of the double-layer structure is arranged in the same layer and material as the second source-drain metal layer SD2.

[0121] like Fig.11 As shown, exemplarily, when the display substrate includes the first source-drain metal layer SD1 and the second source-drain metal layer, the power connection line 40 includes a single-layer structure, and the power connection line 40 is provided in the same layer and material as the first source-drain metal layer SD1.

[0122] Exemplarily, the orthographic projection of the connecting body portion on the base substrate at least partially overlaps with the orthographic projection of the first signal transfer layer 301 on the base substrate; and / or, the orthographic projection of the connecting body portion 401 on the base substrate at least partially overlaps with the orthographic projection of the second signal transfer layer 302 on the base substrate.

[0123] The above arrangement not only effectively reduces the layout space occupied by the power connection line 40 and each signal transfer layer in the lower frame area, but also ensures the insulation between the film layers transmitting different signals, thereby ensuring the reliability of the display substrate.

[0124] like Fig.17 As shown, in some embodiments, the display substrate further includes a first metal layer, and the second signal transfer layer 302 is located on the first metal layer.

[0125] Exemplarily, the display substrate includes a buffer layer, an active layer, a first gate insulating layer, a first gate metal layer, a second gate insulating layer, a second gate metal layer, an interlayer insulating layer, a first source-drain metal layer, a first planar 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 include a passivation layer, but is not limited thereto.

[0126] like Figures 14 to 17 As shown, in some embodiments, the power connection line 40 includes a connection main body portion 401 and a connection protrusion portion 402 coupled to each other, the connection main body portion 401 is located between the connection protrusion portion 402 and the display area AA, the connection main body portion 401 is coupled to the plurality of power lines 41 respectively, and the connection protrusion portion 402 is coupled to the power signal input terminal VDD;

[0127] At least part of the orthographic projection of the connecting main body 401 on the base substrate is located between the orthographic projection of the first signal transfer layer 301 on the base substrate and the display area AA; the orthographic projection of the connecting protrusion 402 on the base substrate does not overlap with the orthographic projection of the first signal transfer layer 301 on the base substrate; and / or the orthographic projection of the connecting protrusion 402 on the base substrate does not overlap with the orthographic projection of the second signal transfer layer 302 on the base substrate; the power connection line 40 and the second signal transfer layer 302 are arranged on the same layer and the same material.

[0128] Exemplarily, the orthographic projection of the connecting body portion 401 on the base substrate at least partially overlaps with the orthographic projection of the first signal transfer layer 301 on the base substrate; and / or the orthographic projection of the connecting body portion 401 on the base substrate at least partially overlaps with the orthographic projection of the second signal transfer layer 302 on the base substrate. The orthographic projection of the connecting protrusion 402 on the base substrate at least partially overlaps with the orthographic projection of the first signal transfer layer 301 on the base substrate.

[0129] The above arrangement not only effectively reduces the layout space occupied by the power connection line 40 and each signal transfer layer in the lower frame area without adding additional patterning processes, but also ensures the insulation between the film layers transmitting different signals and the reliability of the display substrate.

[0130] like Figures 14 to 17 As shown, in some embodiments, the first signal transfer layer 301 is arranged around the display area AA, and at least one first opening area K1 is formed in the lower frame area, and the connecting protrusion 402 is located in the corresponding first opening area K1; and / or, the second signal transfer layer 302 is arranged around the display area AA, and at least one second opening area K2 is formed in the lower frame area, and the connecting protrusion 402 is located in the corresponding second opening area K2.

[0131] Exemplarily, the first opening area K1 corresponds to the connecting protrusion 402 one by one. The second opening area K2 corresponds to the connecting protrusion 402 one by one.

[0132] The above arrangement not only effectively reduces the layout space occupied by the power connection line 40 and each signal transfer layer in the lower frame area without adding additional patterning processes, but also ensures the insulation between the film layers transmitting different signals and the reliability of the display substrate.

[0133] like Figure 2 and Figure 8 As shown, in some embodiments, the display substrate includes at least two power signal input terminals VDD and at least two first signal terminals VSS; the at least two power signal input terminals VDD are divided into at least one group of power terminal groups Z2, and the power terminal group Z2 includes two of the power signal input terminals VDD arranged along a first direction; the at least two first signal terminals VSS are divided into at least one group of first terminal groups Z1, and the first terminal group Z1 includes two of the first signal terminals VSS arranged along a first direction; the orthographic projection of the power terminal group Z2 on the base substrate is located between the orthographic projections of the two first signal terminals VSS in the corresponding first terminal group Z1 on the base substrate.

[0134] like Figure 8 As shown, exemplarily, the display substrate includes two power signal input terminals VDD and two first signal terminals VSS; the two power signal input terminals VDD form a group of power terminal groups Z2; the two first signal terminals VSS form a group of first terminal groups Z1; the orthographic projection of the power terminal group Z2 on the base substrate is located between the orthographic projections of the two first signal terminals VSS in the first terminal group Z1 on the base substrate.

[0135] like Figure 2 As shown, exemplarily, the display substrate includes four power signal input terminals VDD and four first signal terminals VSS; the four power signal input terminals VDD are divided into two groups of power terminal groups Z2 arranged along the first direction, and the power terminal group Z2 includes two of the power signal input terminals VDD arranged along the first direction; the four first signal terminals VSS are divided into two groups of first terminal groups Z1 arranged along the first direction, and the first terminal group Z1 includes two of the first signal terminals VSS arranged along the first direction; the power terminal group Z2 corresponds to the first terminal group Z1 one by one; the orthographic projection of the power terminal group Z2 on the base substrate is located between the orthographic projections of the two first signal terminals VSS in the corresponding first terminal group Z1 on the base substrate.

[0136] like Figures 2 to 4 , Figures 8 to 10As shown, in some embodiments, the power connection line 40 includes a connecting main body 401 and at least one connecting protrusion 402, the connecting main body 401 is respectively coupled to each of the connecting protrusions 402, the connecting main body 401 is located between the connecting protrusion 402 and the display area AA, the connecting main body 401 is respectively coupled to the multiple power lines 41, the connecting protrusions 402 correspond one-to-one to the power terminal group Z2, and the connecting protrusions 402 are respectively coupled to each power signal input terminal VDD in the corresponding power terminal group Z2.

[0137] like Figure 8 As described, exemplarily, the power connection line 40 includes a connecting main body 401 and a connecting protrusion 402, the connecting main body 401 is coupled to the connecting protrusion 402, the display substrate includes a power terminal group Z2, and the connecting protrusion 402 is respectively coupled to each power signal input terminal VDD in the power terminal group Z2.

[0138] like Figure 2 As shown, exemplarily, the power connection line 40 includes a connecting main body 401 and two connecting protrusions 402, the connecting main body 401 is coupled to the two connecting protrusions 402 respectively, the display substrate includes two power terminal groups Z2, the connecting protrusions 402 correspond to the power terminal groups Z2 one by one, and the connecting protrusions 402 are coupled to each power signal input terminal VDD in the corresponding power terminal group Z2 respectively.

[0139] like Figure 2 , Figure 8 and Fig.14 As shown, in some embodiments, the peripheral area includes a first binding area and a second binding area; the first binding area is located between the second binding area and the display area AA; the display substrate also includes a flexible circuit board FPC and at least one driver chip IC, the at least one driver chip IC is bound to the first binding area, and the flexible circuit board FPC is bound to the second binding area; the flexible circuit board FPC is respectively coupled to each of the power signal input terminals VDD and each of the first signal terminals VSS; each of the power signal input terminals VDD and each of the first signal terminals VSS are located between the second binding area and the display area AA, and the orthographic projection of the first binding area on the substrate is located between the orthographic projections of the two power signal input terminals VDD in the corresponding power terminal group Z2 on the substrate.

[0140] like Figure 8As shown, exemplarily, the display substrate includes a driver chip IC and a power terminal group Z2, and the driver chip IC is located between the orthographic projections of the two power signal input terminals VDD in the power terminal group Z2 on the base substrate. Exemplarily, the display substrate includes a first binding area and a power terminal group Z2, and the first binding area is located between the orthographic projections of the two power signal input terminals VDD in the power terminal group Z2 on the base substrate.

[0141] like Figure 2 and Fig.14 As shown, exemplarily, the display substrate includes two driver chips IC and two power terminal groups Z2, the driver chip IC corresponds to the power terminal group Z2 one by one, and the driver chip IC is located between the orthographic projections of the two power signal input terminals VDD in the corresponding power terminal group Z2 on the base substrate. Exemplarily, the display substrate includes two first binding areas and two power terminal groups Z2, the first binding areas correspond to the power terminal group Z2 one by one, and the first binding areas are located between the orthographic projections of the two power signal input terminals VDD in the corresponding power terminal group Z2 on the base substrate.

[0142] An embodiment of the present invention further provides a display substrate, comprising a display area and a peripheral area located around the display area; the display substrate further comprises: a signal transmission layer, at least two stacked signal switching layers, and a first signal terminal; the signal transmission layer extends from the display area to the peripheral area; the signal switching layer and the first signal terminal are both located in the peripheral area;

[0143] Among the at least two signal transfer layers, adjacent signal transfer layers are coupled; the at least two signal transfer layers include a first signal transfer layer and a second signal transfer layer, at least a portion of the second signal transfer layer is located between the first signal transfer layer and the base substrate of the display substrate, the first signal transfer layer is coupled to the signal transmission layer, and the second signal transfer layer is coupled to the first signal end;

[0144] A first transfer area is formed between the signal transmission layer and the first signal transfer layer, the first transfer area includes a plurality of sub-areas arranged in sequence along a direction from the display area to the peripheral area, and in the sub-areas, the signal transmission layer is coupled to the first signal transfer layer;

[0145] The first signal transfer layer includes a first part, the second signal transfer layer includes a second part, a second transfer area is formed between the second part and the first part, and the first part is coupled to the second part in the second transfer area; the orthographic projection of the sub-area closest to the display area on the substrate at least partially overlaps with the orthographic projection of the first contact area on the substrate; the orthographic projection of the sub-area farthest from the display area on the substrate at least partially overlaps with the orthographic projection of the first contact area on the substrate.

[0146] Exemplarily, each sub-region corresponds to a second via hole, and in the sub-region, the signal transmission layer and the first signal transfer layer are coupled through the corresponding second via hole.

[0147] Exemplarily, an orthographic projection of each of the sub-regions on the substrate at least partially overlaps with an orthographic projection of the first contact region on the substrate.

[0148] Exemplarily, the orthographic projection of each of the sub-regions on the substrate is located inside the orthographic projection of the first contact region on the substrate.

[0149] In the technical solution provided by the present invention, the signal transmission layer is electrically connected to the first signal end through the first signal switching layer and the second signal switching layer in sequence. When the first signal switching layer and the second signal switching layer transmit signals between the signal transmission layer and the first signal end, the second part and the first part simultaneously transmit signals. By coupling the signal transmission layer with the first signal switching layer, the first signal switching layer can be electrically connected to the signal transmission layer in multiple border areas, so that the signal can be transmitted between the signal transmission layer and the signal switching layer from multiple directions, thereby better improving the uniformity of signal transmission of the signal transmission layer in the display product, and enhancing the stability of the display effect of the display substrate and the uniformity of the display quality.

[0150] In the technical solution provided by the present invention, since the signal is transmitted to the signal transmission layer through the second transfer area, the signal realizes multi-layer simultaneous transmission when passing through the first signal transfer layer. In this way, even if the thickness of the first signal transfer layer is relatively thin, it can ensure that the first signal transfer layer is not burned by the current during the transmission of the signal, thereby well ensuring the use yield of the display substrate.

[0151] An embodiment of the present invention further provides a display device, comprising the display substrate provided by the above embodiment.

[0152] 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.

[0153] In the display substrate provided in the above embodiment, the signal transmission layer 20 is electrically connected to the first signal terminal VSS through the first signal transfer layer 301 and the second signal transfer layer 302 in sequence. When the first signal transfer layer 301 and the second signal transfer layer 302 transmit signals between the signal transmission layer 20 and the first signal terminal VSS, the second part L2 and the first part L1 jointly realize signal transmission. By coupling the signal transmission layer 20 with the first signal transfer layer 301, the first signal transfer layer 301 can be electrically connected to the signal transmission layer 20 in multiple border areas, so that the signal can be transmitted between the signal transmission layer and the signal transfer layer from multiple directions, thereby better improving the uniformity of signal transmission of the signal transmission layer 20 in the display product, and enhancing the stability of the display effect of the display substrate and the uniformity of the display quality. In the display substrate provided by the above embodiment, since the signal is transmitted to the signal transmission layer 20 through the second part L2 and the first part L1 at the same time, the signal realizes multi-layer simultaneous transmission when passing through the first signal switching layer 301. In this way, even if the thickness of the first signal switching layer 301 is relatively thin, it can avoid excessive loading, ensuring that the first signal switching layer 301 is not burned by the current during the transmission of the signal, thereby well ensuring the use yield of the display substrate.

[0154] Therefore, when the display device provided by the embodiment of the present invention includes the display substrate provided by the above embodiment, it also has the above beneficial effects, which will not be described in detail here.

[0155] 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.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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, It is characterized in that The display substrate includes a display area and a peripheral area located around the display area; the display substrate also includes: a signal transmission layer, the signal transmission layer extending from the display area to the peripheral area; At least two stacked signal transfer layers and a first signal end; the signal transfer layers and the first signal end are both located in the peripheral area; Among the at least two signal transfer layers, adjacent signal transfer layers are coupled; the at least two signal transfer layers include a first signal transfer layer and a second signal transfer layer, at least a portion of the second signal transfer layer is located between the first signal transfer layer and the base substrate of the display substrate, the second signal transfer layer is coupled to the first signal end, and the first signal transfer layer is coupled to the signal transmission layer; There is a first contact area between the signal transmission layer and the first signal transfer layer; the first signal transfer layer includes a first part, the second signal transfer layer includes a second part, a transfer area is formed between the second part and the first part, and the first part is coupled to the second part in the transfer area; the orthographic projection of the transfer area on the base substrate at least partially overlaps with the orthographic projection of the first contact area on the base substrate.

2. The display substrate according to claim 1, It is characterized in that The first portion is located on a surface of the second portion facing away from the substrate; or, the first portion is connected in parallel with the second portion.

3. The display substrate according to claim 2, It is characterized in that The first portion is directly overlapped with the second portion.

4. The display substrate according to claim 2, It is characterized in that The display substrate comprises an insulating layer, and the insulating layer is located between the first signal switching layer and the second signal switching layer; The insulating layer has a first via hole, the first portion is located in the first via hole, and the first portion is in contact with a surface of the second portion facing away from the substrate; Alternatively, the insulating layer has at least two second via holes, and the first portion and the second portion are connected in parallel through the at least two second via holes.

5. The display substrate according to claim 2, It is characterized in that The signal transmission layer includes a cathode layer; the display substrate also includes an anode layer, and the first signal transfer layer and the anode layer are provided in the same layer and with the same material.

6. The display substrate according to claim 5, It is characterized in that The peripheral area includes a lower frame area; the display substrate further includes: A power connection line and at least two power signal input terminals, wherein the at least two power signal input terminals and the power connection line are both located in the lower frame area; A plurality of power lines, wherein the power lines are located in the display area; The power connection line is coupled to the multiple power lines respectively, and at least a part of the orthographic projection of the power connection line on the substrate is located between the orthographic projection of the first signal transfer layer on the substrate and the display area; the power connection line is also coupled to the at least two power signal input terminals respectively, and the at least two power signal input terminals are located on the side of the power connection line away from the display area.

7. The display substrate according to claim 6, It is characterized in that The first signal transfer layer surrounds the display area.

8. The display substrate according to claim 6, It is characterized in that The at least two signal transfer layers further include a third signal transfer layer, at least a portion of which is located between the second signal transfer layer and the base substrate, and the second signal transfer layer is coupled to the first signal end through the third signal transfer layer.

9. The display substrate according to claim 8, It is characterized in that The display substrate comprises a first metal layer and a second metal layer which are sequentially stacked in a direction away from the base substrate; the second signal transfer layer is located on the second metal layer, and the third signal transfer layer is located on the first metal layer.

10. The display substrate according to claim 6, It is characterized in that The at least two signal transfer layers also include a third signal transfer layer and a fourth signal transfer layer. Along the direction away from the base substrate, the fourth signal transfer layer, the third signal transfer layer and the second signal transfer layer are stacked in sequence; the second signal transfer layer is coupled to the first signal end through the third signal transfer layer and the fourth signal transfer layer in sequence.

11. The display substrate according to claim 10, It is characterized in that The display substrate includes a first metal layer, a second metal layer and a third metal layer stacked in sequence in a direction away from the base substrate; the second signal transfer layer is located on the third metal layer, the third signal transfer layer is located on the second metal layer, and the fourth signal transfer layer is located on the first metal layer.

12. The display substrate according to claim 8 or 10, It is characterized in that The second signal transfer layer surrounds the display area.

13. The display substrate according to claim 12, It is characterized in that The power connection line includes a connection main body and a connection protrusion coupled to each other, the connection main body is located between the connection protrusion and the display area, the connection main body is coupled to the plurality of power lines respectively, and the connection protrusion is coupled to the power signal input terminal; At least a portion of the orthographic projection of the connecting body portion on the base substrate is located between the orthographic projection of the first signal transfer layer on the base substrate and the display area; The orthographic projection of the connecting protrusion on the base substrate at least partially overlaps with the orthographic projection of the first signal transfer layer on the base substrate; And / or, an orthographic projection of the connecting protrusion on the base substrate at least partially overlaps with an orthographic projection of the second signal transfer layer on the base substrate.

14. The display substrate according to claim 6, It is characterized in that The display substrate further includes a first metal layer, and the second signal transfer layer is located on the first metal layer.

15. The display substrate according to claim 6, It is characterized in that The power connection line includes a connection main body and a connection protrusion coupled to each other, the connection main body is located between the connection protrusion and the display area, the connection main body is coupled to the plurality of power lines respectively, and the connection protrusion is coupled to the power signal input terminal; At least a portion of the orthographic projection of the connecting body portion on the base substrate is located between the orthographic projection of the first signal transfer layer on the base substrate and the display area; The orthographic projection of the connecting protrusion on the base substrate does not overlap with the orthographic projection of the first signal transfer layer on the base substrate; And / or, the orthographic projection of the connecting protrusion on the base substrate does not overlap with the orthographic projection of the second signal switching layer on the base substrate; the power connection line and the second signal switching layer are provided in the same layer and with the same material.

16. The display substrate according to claim 15, It is characterized in that The first signal transfer layer is arranged around the display area and forms at least one first opening area in the lower frame area, and the connecting protrusion is located in the corresponding first opening area; And / or, the second signal transfer layer is arranged around the display area and forms at least one second opening area in the lower frame area, and the connecting protrusion is located in the corresponding second opening area.

17. The display substrate according to any one of claims 6 to 16, It is characterized in that The display substrate includes at least two power signal input terminals and at least two first signal terminals; the at least two power signal input terminals are divided into at least one power terminal group, and the power terminal group includes two power signal input terminals arranged along a first direction; the at least two first signal terminals are divided into at least one first terminal group, and the first terminal group includes two first signal terminals arranged along a first direction; the orthographic projection of the power terminal group on the base substrate is located between the orthographic projections of the two first signal terminals in the corresponding first terminal group on the base substrate.

18. The display substrate according to claim 17, It is characterized in that The power connection line includes a connecting body portion and at least one connecting protrusion, the connecting body portion is respectively coupled to each of the connecting protrusions, the connecting body portion is located between the connecting protrusions and the display area, the connecting body portion is respectively coupled to the multiple power lines, the connecting protrusions correspond one-to-one to the power terminal groups, and the connecting protrusions are respectively coupled to each power signal input terminal in the corresponding power terminal group.

19. The display substrate according to claim 17, It is characterized in that The peripheral area includes a first binding area and a second binding area; the first binding area is located between the second binding area and the display area; the display substrate further includes a flexible circuit board and at least one driver chip, the at least one driver chip is bound to the first binding area, and the flexible circuit board is bound to the second binding area; The flexible circuit board is coupled to each of the power signal input terminals and each of the first signal terminals respectively; each of the power signal input terminals and each of the first signal terminals are located between the second binding area and the display area, and the orthographic projection of the first binding area on the substrate is located between the orthographic projections of the two power signal input terminals in the corresponding power terminal group on the substrate.

20. A display substrate, It is characterized in that The display substrate includes a display area and a peripheral area located around the display area; the display substrate also includes: a signal transmission layer, the signal transmission layer extending from the display area to the peripheral area; At least two stacked signal transfer layers and a first signal terminal; the signal transfer layers and the first signal terminal are both located in the peripheral area; Among the at least two signal transfer layers, adjacent signal transfer layers are coupled; the at least two signal transfer layers include a first signal transfer layer and a second signal transfer layer, at least a portion of the second signal transfer layer is located between the first signal transfer layer and the base substrate of the display substrate, the second signal transfer layer is coupled to the first signal end, and the first signal transfer layer is coupled to the signal transmission layer; A first transfer area is formed between the signal transmission layer and the first signal transfer layer, the first transfer area includes a plurality of sub-areas arranged in sequence along a direction from the display area to the peripheral area, and in the sub-areas, the signal transmission layer is coupled to the first signal transfer layer; The first signal transfer layer includes a first part, the second signal transfer layer includes a second part, a second transfer area is formed between the second part and the first part, and the first part is coupled to the second part in the second transfer area; the orthographic projection of the sub-area closest to the display area on the substrate at least partially overlaps with the orthographic projection of the first contact area on the substrate; the orthographic projection of the sub-area farthest from the display area on the substrate at least partially overlaps with the orthographic projection of the first contact area on the substrate.

21. A display device, It is characterized in that The invention comprises the display substrate according to any one of claims 1 to 20.

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