US-12626667-B2 - Display panel, repairing method and display device

Abstract

A display substrate, a repair method and a display device are provided. The display substrate includes a base substrate and a driving module arranged on the base substrate; the driving module includes a control switch and a driving circuit; an input terminal of an nth stage of driving circuit included in the driving module is electrically connected to an output terminal of an (n−m)th stage of driving circuit included in the driving module through an input cascade line; n and m are positive integers, and m is less than n; the driving module further includes at least one connection line, the connection line extends along a first direction. The repairing method includes: when previous c stages of driving circuits included in the driving module in the display substrate are cut off, controlling, by the control switch, to connect the connection line and the input cascade line.

Inventors

• Maoxiu ZHOU
• Yanping Liao
• Ke Dai
• Haipeng Yang
• Chunxu ZHANG
• Min Cheng
• Xiaoting JIANG
• Yue Yang

Assignees

• HEFEI BOE DISPLAY TECHNOLOGY CO., LTD.
• BOE TECHNOLOGY GROUP CO., LTD.

Dates

Publication Date

20260512

Application Date

20230329

Claims (20)

1. 1 . A display substrate, comprising a base substrate and a driving module arranged on the base substrate; wherein the driving module includes a control switch and N cascaded driving circuits; each of the N cascaded driving circuits includes an input terminal; N is a positive integer; input terminals of first k stages of driving circuits included in the driving module is electrically connected to a start voltage line; k is a positive integer; an input terminal of an nth stage of driving circuit included in the driving module is electrically connected to an output terminal of an (n−m)th stage of driving circuit included in the driving module through an input cascade line; n and m are positive integers, and m is less than n; the driving module further includes at least one connection line, the connection line extends along a first direction; there is an overlapping area between an orthographic projection of the connection line on the base substrate and an orthographic projection of the start voltage line on the base substrate; and/or there is an overlapping area between the orthographic projection of the connection line on the base substrate and an orthographic projection of the input cascade line on the base substrate; the control switch is electrically connected to the connection line.
2. 2 . The display substrate according to claim 1 , wherein at least part of the connection line and the start voltage line are located on different layers, and at least part of the connection line and the input cascade line are located on different layers.
3. 3 . The display substrate according to claim 1 , wherein the connection line is provided between two adjacent driving circuits of the N cascaded driving circuits; or the connection line penetrates at least part of at least one driving circuit of the N cascaded driving circuits.
4. 4 . The display substrate according to claim 1 , wherein the driving module includes a plurality of clock signal lines, the N cascaded driving circuits and a line collection portion; each of the N cascaded driving circuits includes a first driving circuit portion and a second driving circuit portion; the plurality of clock signal lines, the first driving circuit portion, the line collection portion and the second driving circuit portion are arranged in sequence along a direction close to a display area; the input cascade line is provided in the line collection portion; each of the N cascaded driving circuits includes the first driving circuit portion and the second driving circuit portion.
5. 5 . The display substrate according to claim 4 , wherein the control switch includes a control line and a control module; the control module is electrically connected to the control line, the start voltage line, the connection line and the line collection portion respectively, and is configured to control to connect or disconnect the connection line and the line collection portion under the control of a control signal provided by the control line; there is an overlapping area between the orthographic projection of the connection line on the base substrate and the orthographic projection of the line collection portion on the base substrate.
6. 6 . The display substrate according to claim 5 , wherein the control module is electrically connected to the input cascade line in the line collection portion; the control module includes at least one control sub-module; a control sub-module corresponding to the nth stage of driving circuit included in the driving module is electrically connected to an input terminal of the (n+j)th stage of driving circuit through the input cascade line; j is a positive integer.
7. 7 . The display substrate according to claim 6 , wherein the control line includes a first control line and a second control line, and the control sub-module includes a first control circuit and a second control circuit; the first control circuit is electrically connected to the first control line, the start voltage line and the connection line respectively, and is configured to control to connect or disconnect the start voltage line and the connection line under the control of a first control signal provided by the first control line; the second control circuit is electrically connected to the second control line, the connection line and the input cascade line respectively, and is configured to control to connect or disconnect the connection line and the input cascade line under the control of a second control signal provided by the second control line.
8. 8 . The display substrate according to claim 7 , wherein the driving module includes a plurality of connection lines; each connection line of the plurality of connection lines is provided between two adjacent stages; a first terminal of the connection line is electrically connected to the first control circuit, and a second terminal of the connection line is electrically connected to the second control circuit; the first terminal and the second terminal are opposite terminals.
9. 9 . The display substrate according to claim 8 , wherein the first control circuit includes a first control transistor, and the second control circuit includes a second control transistor; a gate electrode of the first control transistor is electrically connected to a first electrode of the first control transistor, the gate electrode of the first control transistor is electrically connected to the first control line, and the first electrode of the first control transistor is electrically connected to the first terminal of the connection line, and a second electrode of the first control transistor is electrically connected to the start voltage line; a gate electrode of the second control transistor is electrically connected to the second control line, a first electrode of the second control transistor is electrically connected to the second terminal of the connection line, and a second electrode of the second control transistor is electrically connected to the input cascade line.
10. 10 . The display substrate according to claim 7 , wherein the first control circuit includes a first control transistor, and the second control circuit includes a second control transistor; a gate electrode of the first control transistor is electrically connected to the first control line, a first electrode of the first control transistor is electrically connected to a first terminal of the connection line, and a second electrode of the first control transistor is electrically connected to the start voltage line; a gate electrode of the second control transistor is electrically connected to the second control line, a first electrode of the second control transistor is electrically connected to a second terminal of the connection line, and a second electrode of the second control transistor is electrically connected to the input cascade line.
11. 11 . The display substrate according to claim 6 , wherein the control line includes a second control line, and the control sub-module includes a first control circuit and a second control circuit; the connection line is electrically connected to the start voltage line; the second control circuit is electrically connected to the second control line, the connection line and the input cascade line respectively, and is configured to control to connect or disconnect the connection line and the input cascade line under the control of a second control signal provided by the second control line, wherein the driving module includes a plurality of connection lines; each connection line of the plurality of connection lines is provided between two adjacent stages; a first terminal of each connection line of the plurality of connection lines is electrically connected to the start voltage line, and a second terminal of each connection line of the plurality of connection lines is electrically connected to the second control circuit; the first terminal and the second terminal are opposite terminals, wherein the first control circuit includes a first control transistor, and the second control circuit includes a second control transistor; a gate electrode of the second control transistor is electrically connected to the second control line, a first electrode of the second control transistor is electrically connected to the second terminal of the connection line, and a second electrode of the second control transistor is electrically connected to the input cascade line.
12. 12 . The display substrate according to claim 6 , wherein the control line includes a first control line, and the control sub-module includes a first control circuit; the first control circuit is electrically connected to the first control line, the start voltage line and the connection line respectively, and is configured to control to connect or disconnect the connection line and the start voltage line under the control of a first control signal provided by the first control line; the connection line is electrically connected to the input cascade line, the driving module includes a plurality of connection lines; each connection line of the plurality of connection lines is provided between two adjacent stages; a first terminal of each connection line of the plurality of connection lines is electrically connected to the first control circuit, and a second terminal of each connection line of the plurality of connection lines is electrically connected to the input cascade line; the first terminal and the second terminal are opposite terminals, the first control circuit includes a first control transistor; a gate electrode of the first control transistor is electrically connected to the first control line, a first electrode of the first control transistor is electrically connected to the start voltage line, and a second electrode of the first control transistor is electrically connected to the first terminal of the connection line.
13. 13 . The display substrate according to claim 4 , wherein the connection line included in the driving module penetrates the clock signal line included in the driving circuit, the first driving circuit portion and the line collection portion in a direction from away from the display area to close to the display area.
14. 14 . The display substrate according to claim 4 , wherein the display substrate includes a first metal layer and an electrode layer sequentially arranged in a direction away from the base substrate; the connection line includes a first line portion formed on the electrode layer and a second line portion formed on the first metal layer; the first line portion and the second line portion are electrically connected; at least part of the first line portion is provided in a clock signal line area, the first driving circuit portion and the line collection portion; the clock signal line area is an area where the plurality of clock signal lines are provided; at least part of the second line portion is provided on the line collection portion.
15. 15 . The display substrate according to claim 1 , wherein at least one driving circuit of the N cascaded driving circuits includes an input circuit; the input circuit includes a control terminal, a first terminal and a second terminal; the control terminal of the input circuit is electrically connected to an input terminal of a corresponding driving circuit of the N cascaded driving circuits, and the second terminal of the input circuit is electrically connected to a pull-up node; the input circuit is configured to control a potential of the pull-up node under the control of an input signal provided by the input terminal, wherein the input circuit includes a first transistor; a gate electrode of the first transistor is electrically connected to a first input terminal, a first electrode of the first transistor is electrically connected to a second input terminal, and a second electrode of the first transistor is electrically connected to the pull-up node; the first input terminal and the second input terminal are electrically connected or not electrically connected, the gate electrode of the first transistor is formed on a second metal layer, and the first electrode of the first transistor is formed on a first metal layer; the gate electrode of the first transistor is electrically connected to a first connection line portion formed on the second metal layer; the first electrode of the first transistor is electrically connected to a second connection line portion formed in the second metal layer through a via hole; at least one connection line of the driving module includes a third connection line portion formed on an electrode layer and a fourth connection line portion formed on the first metal layer; the third connection line portion and the fourth connection line portion are electrically connected; there is an overlapping area between an orthographic projection of the third connection line portion on the base substrate and an orthographic projection of the first connection line portion on the base substrate; there is an overlapping area between an orthographic projection of the fourth connection line portion on the base substrate and an orthographic projection of the second connection line portion on the base substrate, wherein the display substrate further comprises a fifth connection line portion and a sixth connection line portion; the fifth connection line portion is formed on the electrode layer, and the fifth connection line portion is connected to the third connection line portion; the sixth connection line portion is formed on the first metal layer, and the sixth connection line portion is connected to the fourth connection line portion; the fifth connection line portion and the sixth connection line portion are electrically connected.
16. 16 . The display substrate according to claim 1 , wherein at least one driving circuit of the N cascaded driving circuits includes a first driving circuit portion; the first driving circuit portion includes an input circuit, a pull-up node control circuit, a first pull-down node control circuit, a second pull-down node control circuit and a reset circuit; the input circuit is configured to control a potential of a pull-up node under the control of an input signal provided by an input terminal of a corresponding driving circuit of the N cascaded driving circuits; the pull-up node control circuit is configured to control the potential of the pull-up node; the first pull-down node control circuit is configured to control a potential of a first pull-down node; the second pull-down node control circuit is configured to control a potential of a second pull-down node; the reset circuit is configured to reset a driving signal provided by a driving signal output terminal of a current stage under the control of the potential of the first pull-down node and the potential of the second pull-down node.
17. 17 . A manufacturing method, applied to the display substrate according to claim 1 , comprising: when previous c stages of driving circuits included in the driving module in the display substrate are cut off, controlling, by the control switch, to connect the connection line and the input cascade line; wherein the input cascade line is electrically connected to an input terminal of a (c+k)th stage of driving circuit; both c and k are positive integers.
18. 18 . The manufacturing method according to claim 17 , wherein the control switch includes a control module and a control line; the control line includes a first control line and the second control line, the control module includes at least one control sub-module, the control sub-module includes a first control circuit and a second control circuit; the repairing method includes: when the first c stages of driving circuits included in the driving module in the display substrate are cut off, a connection line close to the (c+p)th stage of driving circuit being used to transmit the start voltage signal; disconnecting a first control line between a first control circuit corresponding to a (c+p)th stage of driving circuit from a first control circuit corresponding to a (c+p+1)th stage of driving circuit; disconnecting the second control line between the second control circuit corresponding to the (c+p)th stage of driving circuit from the second control circuit corresponding to the (c+p+1)th stage of driving circuit; p is a positive integer greater than or equal to 1; or the control switch includes a control module and a control line; the control line includes a second control line, and the control module includes at least one control sub-module, the control sub-module includes a second control circuit; the repair method includes: when the first c stages of driving circuits included in the driving module in the display substrate are cut off, the connection line close to the (c+p)th stage of driving circuit being used to transmit the start voltage signal; disconnecting the second control line between the second control circuit corresponding to the (c+p)th stage of driving circuit and the second control circuit corresponding to the (c+p+1)th stage of driving circuit; p is a positive integer greater than or equal to 1; or the control switch includes a control module and a control line; the control line includes a first control line, and the control module includes at least one control sub-module, the control sub-module includes a first control circuit; the repair method includes: when the first c stages of driving circuits included in the driving module in the display substrate are cut off, the connection line close to the (c+p)th stage of driving circuit being used to transmit the start voltage signal; disconnecting the first control line between the first control circuit corresponding to the (c+p)th stage of driving circuit and the first control circuit corresponding to the (c+p+1)th stage of driving circuit; p is a positive integer greater than or equal to 1.
19. 19 . A display device, comprising the display substrate according to claim 1 .
20. 20 . A display substrate, comprising a base substrate and a driving module arranged on the base substrate; wherein the driving module includes N cascaded driving circuits; each of the N cascaded driving circuits includes an input terminal; N is a positive integer; input terminals of first k stages of driving circuits included in the driving module are electrically connected to a start voltage line; k is a positive integer; an input terminal of an nth stage of driving circuit included in the driving module is electrically connected to an output terminal of the (n−m)th stage of driving circuit included in the driving module through an input cascade line; n and m are positive integers, and m is less than n; the driving module also includes at least one connection line, the connection line extends along a first direction; there is an overlapping area between an orthographic projection of the connection line on the base substrate and an orthographic projection of the start voltage line on the base substrate; and/or there is an overlap area between the orthographic projection of the connection line on the base substrate and an orthographic projection of the input cascade line on the base substrate.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application is the U.S. national phase of PCT Application No. PCT/CN2023/084627 filed on Mar. 29, 2023, which is incorporated herein by reference in its entirety. TECHNICAL FIELD The present disclosure relates to the field of display technology, in particular to a display panel, a repairing method and a display device. BACKGROUND In the related art, when a large-sized display substrate needs to be cut to form a small-sized display substrate, the start voltage is output by the timing controller (TCON) and then output to the level shifter. The start voltage line is used to provide an start signal to the gate driving circuit of the display panel. TCON is set in the driving integrated circuit (IC). The start voltage line extends from the side of the driving IC to the side away from the driving IC, then if horizontal cutting is performed (the horizontal direction is the extension direction of the gate lines), the start voltage line will be cut off, so that the display substrate obtained after cutting cannot work properly. SUMMARY In one aspect, the present disclosure provides in some embodiments a display substrate, including a base substrate and a driving module arranged on the base substrate; wherein the driving module includes a control switch and N cascaded driving circuits; the driving circuit includes an input terminal; N is a positive integer; input terminals of previous a stages of driving circuits included in the driving module is electrically connected to a start voltage line; a is a positive integer; an input terminal of an nth stage of driving circuit included in the driving module is electrically connected to an output terminal of an (n−m)th stage of driving circuit included in the driving module through an input cascade line; n and m are positive integers, and m is less than n; the driving module further includes at least one connection line, the connection line extends along a first direction; there is an overlapping area between an orthographic projection of the connection line on the base substrate and an orthographic projection of the start voltage line on the base substrate; and/or, there is an overlapping area between the orthographic projection of the connection line on the base substrate and an orthographic projection of the input cascade line on the base substrate; the control switch is electrically connected to the connection line. Optionally, at least part of the connection line and the start voltage line are located on different layers, and at least part of the connection line and the input cascade line are located on different layers. Optionally, the connection line is provided between two adjacent driving circuits; or the connection line penetrates at least part of the driving circuit. Optionally, the driving module includes a plurality of clock signal lines, a plurality of stages of driving circuits and a line collection portion; the driving circuit includes a first driving circuit portion and a second driving circuit portion; the plurality of clock signal lines, the first driving circuit portion, the line collection portion and the second driving circuit portion are arranged in sequence along a direction close to a display area; the input cascade line is provided in the line collection portion; the driving circuit includes the first driving circuit portion and the second driving circuit portion. Optionally, the control switch includes a control line and a control module; the control module is electrically connected to the control line, the start voltage line, the connection line and the line collection portion respectively, and is configured to control to connect or disconnect the connection line and the line collection portion under the control of a control signal provided by the control line; there is an overlapping area between the orthographic projection of the connection line on the base substrate and the orthographic projection of the line collection portion on the base substrate. Optionally, the control module is electrically connected to the input cascade line in the line collection portion; the control module includes at least one control sub-module; a control sub-module corresponding to the nth stage of driving circuit included in the driving module is electrically connected to an input terminal of the (n+j)th stage of driving circuit through the input cascade line; j is a positive integer. Optionally, the control line includes a first control line and a second control line, and the control sub-module includes a first control circuit and a second control circuit; the first control circuit is electrically connected to the first control line, the start voltage line and the connection line respectively, and is configured to control to connect or disconnect the start voltage line and the connection line under the control of a first control signal provided by the first control line; the second control circuit is electrically connected