Display apparatus with signal repair circuit, drive chip therefor, and related electronic device

Patent metadata

Field	Value
Publication number	US-11935498-B2
Application number	US-202117759595-A
Country	US
Kind code	B2
Filing date	Sep 22, 2021
Priority date	Sep 30, 2020
Publication date	Mar 19, 2024
Grant date	Mar 19, 2024

Abstract

Disclosed are a display apparatus, a drive chip, and an electronic device. When determining that a disconnected signal line exists, the drive chip sends a control signal to a signal line repair module, so that when a shift output end of the first shift unit corresponding to the disconnected signal line outputs an enable signal, a selector switch corresponding to the shift output end is turned on, and then a connection control unit keeps outputting a turn-on signal to a control end of a corresponding connection switch.

First claim

What is claimed is:

1. A display apparatus, comprising:
a plurality of sub-pixels, wherein the sub-pixels are configured to be used for light-emitting display;
a plurality of signal lines, wherein the plurality of signal lines are electrically connected to the plurality of sub-pixels and are configured to provide a signal required for light-emitting display to the plurality of sub-pixels;
a signal line repair circuit, wherein the signal line repair circuit is electrically connected to the plurality of signal lines, and configured to repair a disconnected signal line; and the signal line repair circuit comprises:
a repair line;
a connection switch group, wherein the connection switch group comprises a plurality of connection switches, and the plurality of connection switches are disposed in a one-to-one correspondence with the plurality of signal lines, input ends of the plurality of connection switches are electrically connected to the corresponding signal lines, and output ends of the plurality of connection switches are electrically connected to the repair line;
a connection control circuit group, wherein the connection control circuit group comprises a plurality of connection control circuits, the plurality of connection control circuits are disposed in a one-to-one correspondence with the plurality of connection switches, and an output end of each connection control circuit is connected to a control end of a corresponding connection switch, and when the output end of each connection control circuit outputs a turn-on signal to the control end of the corresponding connection switch, the signal line electrically connected to the input end of the corresponding connection switch is electrically connected to the repair line that is electrically connected to the output end of the corresponding connection switch;
a selector switch group, wherein the selector switch group comprises a plurality of selector switches, the plurality of selector switches are disposed in a one-to-one correspondence with the plurality of connection control circuits, and an output end of each selector switch is electrically connected to a connection control end of a corresponding connection control circuit; and
a first shift circuit group, wherein the first shift circuit group comprises a plurality of stages of first shift circuits, the plurality of stages of first shift circuits are disposed in a one-to-one correspondence with the plurality of selector switches, and a shift output end of each first shift circuit is electrically connected to an input end of a corresponding selector switch; and

a drive chip, wherein the drive chip is electrically connected to the plurality of signal lines and the signal line repair circuit, and is configured for providing the signal required for controlling the light-emitting display of the plurality of sub-pixels to the signal lines, and sending, when determining that a disconnected signal line exists, a control signal to the signal line repair circuit, to enable the disconnected signal line to be electrically connected to the repair line in the signal line repair circuit, and wherein:
sending the control signal to the signal line repair circuit, to enable the disconnected signal line to be electrically connected to the repair line in the signal line repair circuit, comprises:
sending the control signal to the signal line repair circuit, so that a shift output end of the first shift circuit corresponding to the disconnected signal line outputs an enable signal, to control a corresponding selector switch to be turned on; and
after the enable signal output by the shift output end reaches a corresponding connection control circuit by using the selector switch that is turned on, controlling the corresponding connection control circuit to keep outputting a turn-on signal, and transmitting the turn-on signal to a control end of a corresponding connection switch to turn on the corresponding connection switch, so that the disconnected signal line is electrically connected to the repair line.

2. The display apparatus according to claim 1 , wherein the plurality of stages of first shift circuits in the first shift circuit group are sequentially cascaded.

3. The display apparatus according to claim 1 , wherein:
each connection control circuit comprises a second output subcircuit, a control end of each second output subcircuit is the connection control end and is electrically connected to an output end of a corresponding selector switch, an input end of each second output subcircuit is electrically connected to a turn-on signal line, and an output end of each second output subcircuit is used as the output end of the corresponding connection control circuit and is electrically connected to a control end of a corresponding connection switch;
sending the control signal to the signal line repair circuit by the drive chip comprises transmitting a turn-on signal to the turn-on signal line; and
each second output subcircuit is configured to: when receiving the enable signal output by the shift output end of the corresponding first shift circuit, transmit the turn-on signal transmitted on the turn-on signal line to the control end of the corresponding connection switch, to control the corresponding connection switch to be turned on.

4. The display apparatus according to claim 3 , wherein:
each second output subcircuit comprises a fifth transistor, a sixth transistor, and a second capacitor;
a gate of each fifth transistor is electrically connected to a source thereof and is electrically connected to the output end of the corresponding selector switch as the connection control end, and a drain thereof is electrically connected to a first polar plate of the corresponding second capacitor;
a gate of each sixth transistor is electrically connected to the first polar plate of the corresponding second capacitor, a source of each sixth transistor is electrically connected to the turn-on signal line as the input end of the corresponding second output subcircuit, and a drain of each sixth transistor is electrically connected to a second polar plate of the corresponding second capacitor as the output end of corresponding second output subcircuit; and
the second polar plate of each second capacitor is electrically connected to the control end of the corresponding connection switch as the output end of the corresponding connection control circuit.

5. The display apparatus according to claim 4 , wherein:
each connection control circuit further comprises a second reset subcircuit, a control end of each second reset subcircuit is used as the reset control end of the corresponding connection control circuit and is electrically connected to a reset control line, an input end of each second reset subcircuit is electrically connected to a second reset signal line, and an output end of each second reset subcircuit is electrically connected to a control end of a corresponding connection switch as the output end of the corresponding connection control circuit;
sending the control signal to the signal line repair circuit by the drive chip comprises transmitting a reset control signal to the reset control line and transmitting a reset signal to the second reset signal line; and
each second reset subcircuit is configured to: when the reset control line receives the reset control signal, transmit the reset signal transmitted on the second reset signal line to a control end of a corresponding connection switch, to control the signal line electrically connected to the input end of the corresponding connection switch to be electrically disconnected from the repair line electrically connected to the output end of the corresponding connection switch.

6. The display apparatus according to claim 5 , wherein:
each second reset sub

Assignees

• Honor Device Co Ltd

Inventors

• Chen Pengming
• Liang Jide
• Li Ruiliang
• Zhang Feng
• Deng Jiandong
• Li Muyao

Classifications

• G09G3/3648 Primary

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• G09G3/006

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title

• G09G3/3225 Primary

  using an active matrix · CPC title

• G09G2330/08

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

• G09G2330/12

  Test circuits or failure detection circuits included in a display system, as permanent part thereof · CPC title