Array substrate, display panel and display device having the same, and method thereof

Patent metadata

Field	Value
Publication number	US-10001684-B2
Application number	US-201515036918-A
Country	US
Kind code	B2
Filing date	Dec 10, 2015
Priority date	Jun 25, 2015
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

The present application discloses an array substrate having a signal line; a common electrode line; an electrostatic discharge (ESD) protector comprising a first discharging terminal coupled to the signal line, and a second discharging terminal coupled to the common electrode line; and an ESD protector repair unit comprising a first repair terminal in close proximity to the first discharging terminal but separated from each other, a second repair terminal in close proximity to the common electrode line but separated from each other.

First claim

What is claimed is:

1. An array substrate, comprising:
a signal line;
a common electrode line;
an electrostatic discharge (ESD) protector comprising a first discharging terminal coupled to the signal line, and a second discharging terminal coupled to the common electrode line; and
an ESD protector repair unit comprising a first repair terminal in close proximity to, and insulated from, the first discharging terminal, and a second repair terminal in close proximity to, and insulated from, the common electrode line;
wherein the ESD protector repair unit is insulated from the ESD protector and insulated from the common electrode line.

2. The array substrate of claim 1 , wherein an orthographic projection of the first repair terminal on a base substrate of the array substrate intersects with an orthographic projection of the first discharging terminal on the base substrate, and an orthographic projection of the second repair terminal on the base substrate intersects with the common electrode line.

3. The array substrate of claim 1 , wherein
the ESD protector comprises a positive ESD protector; and
the ESD protector repair unit comprises a positive ESD protector repair unit.

4. The array substrate of claim 3 , wherein the positive ESD protector comprises a first thin film transistor, a gate electrode and a source electrode of the first thin film transistor are coupled to the signal line through the first discharging terminal, a drain electrode of the first thin film transistor is coupled to the common electrode line through the second discharging terminal.

5. The array substrate of claim 3 , wherein the positive ESD protector repair unit comprises a third thin film transistor, a gate electrode and a source electrode of the third thin film transistor are coupled to the first repair terminal, a drain electrode of the third thin film transistor is coupled to the second repair terminal.

6. The array substrate of claim 3 , wherein the positive ESD protector and the positive ESD protector repair unit comprise a P-type thin film transistor.

7. The array substrate of claim 1 , wherein:
the ESD protector comprises a negative ESD protector; and
the ESD protector repair unit comprises a negative ESD protector repair unit.

8. The array substrate of claim 7 , wherein the negative ESD protector comprises a second thin film transistor, a drain electrode of the second thin film transistor is coupled to the signal line through the third discharging terminal, a gate electrode and a source electrode of the second thin film transistor are coupled to the common electrode line through the fourth discharging terminal.

9. The array substrate of claim 7 , wherein the negative ESD protector repair unit comprises a fourth thin film transistor, a gate electrode and a source electrode of the fourth thin film transistor are coupled to the fourth repair terminal, a drain electrode of the fourth thin film transistor is coupled to the third repair terminal.

10. The array substrate of claim 7 , wherein the negative ESD protector and the negative ESD protector repair unit comprise an N-type thin film transistor.

11. The array substrate of claim 1 , wherein:
the ESD protector comprises a positive ESD protector and a negative ESD protector, and the ESD protector repair unit comprises a positive ESD protector repair unit and a negative ESD protector repair unit;
the positive ESD protector comprising the first discharging terminal coupled to the signal line, and the second discharging terminal coupled to the common electrode line;
the positive ESD protector repair unit comprising the first repair terminal in close proximity to, and insulated from, the first discharging terminal, and the second repair terminal in close proximity to, and insulated from, the common electrode line;
the negative ESD protector comprising a third discharging terminal coupled to a signal line, a fourth discharging terminal coupled to a common electrode line; and
the negative ESD protector repair unit comprising a third repair terminal in close proximity to, and insulated from, the third discharging terminal, a fourth repair terminal in close proximity to, and insulated from, the common electrode line.

12. The array substrate of claim 11 , wherein:
when the positive ESD protector becomes dysfunctional, the first repair terminal is fused with or connected to the first discharging terminal, and the second repair terminal is fused with or connected to the common electrode line thereby repairs the dysfunctional ESD protector;
when the negative ESD protector becomes dysfunctional, the third repair terminal is fused with or connected to the third discharging terminal, and the fourth repair terminal is fused with or connected to the common electrode line thereby repairs the dysfunctional ESD protector.

13. The array substrate of claim 11 , wherein the positive ESD protector and the negative ESD protector are integrated as an integrated ESD protector, the first discharging terminal and the third discharging terminal are joined together, and the second discharging terminal and the fourth discharging terminal are joined together.

14. The array substrate of claim 13 , wherein the positive ESD protector repair unit and the negative ESD protector repair unit are alternately arranged and spaced apart by the integrated ESD protector.

15. The array substrate of claim 14 , wherein the positive ESD protector repair unit is disposed between two positive ESD protectors from two neighboring integrated ESD protectors, and the negative ESD repair unit is disposed between two negative ESD protectors from two neighboring integrated ESD protectors, wherein
the positive ESD protector repair unit comprises a third thin film transistor, a gate electrode and a source electrode of the third thin film transistor are coupled to the first repair terminal, a drain electrode of the third thin film transistor is coupled to the second repair terminal; and
the negative ESD protector repair unit comprises a fourth thin film transistor, a gate electrode and a source electrode of the fourth thin film transistor are coupled to the second repair terminal, a drain electrode of the fourth thin film transistor is coupled to the first repair terminal.

16. The array substrate of claim 1 , wherein, when the ESD protector becomes dysfunctional, the first repair terminal is connected to the first discharging terminal, and the second repair terminal is connected to the common electrode line thereby repairs the dysfunctional ESD protector;
wherein the first repair terminal is connected to the first discharging terminal by fusing or by injecting a conductive material between the first repair terminal and the first discharging terminal; and the second repair terminal is connected to the common electrode line by fusing or by injecting a conductive material between the second repair terminal and the common electrode line.

17. The array substrate of claim 1 , wherein the signal line is a data line or a gate line.

18. A display panel comprising an array substrate of claim 1 .

19. A display device comprising a display panel of claim 18 .

20. A method of repairing an array substrate, wherein the array substrate comprises:
a signal line;
a common electrode line;
an electrostatic discharge (ESD) protector comprising a first discharging terminal coupled to the signal line, and a second discharging terminal coupled to the common electrode line; and
an ESD protector repair unit comprising a first repair terminal in close proxim

Assignees

• Boe Technology Group Co Ltd

Inventors

• Gai Cuili
• Wu Zhongyuan
• Yin Jingwen
• Wang Longyan

Classifications

• G02F1/136259

  Repairing; Defects · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G02F1/136204 Primary

  Arrangements to prevent high voltage or static electricity failures · CPC title

• G09G2330/08

  Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared · CPC title

• G09G2330/04

  Display protection · CPC title