Display apparatus, drive chip, and electronic device

Patent metadata

Field	Value
Publication number	US-11928996-B2
Application number	US-202117793520-A
Country	US
Kind code	B2
Filing date	Sep 22, 2021
Priority date	Sep 30, 2020
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

Disclosed are a display apparatus, a drive chip, and an electronic device. When determining that a disconnected signal line (DL) exists, a drive chip sends a control signal to a signal line repair module, so that shift output ends (OUT) of a plurality of shift units sequentially output enable signals, and the shift unit corresponding to a connection switch electrically connected to the disconnected signal line (DL) continuously outputs enable signals, so that the connection switch electrically connected to the disconnected signal line (DL) is continuously turned on. The display apparatus may repair a disconnected signal line without being returned to a factory and a manual operation.

First claim

What is claimed is:

1. A display apparatus, comprising:
a plurality of sub-pixels, wherein the sub-pixels are 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, respectively, and the plurality of signal lines provide signals 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
a non-display area that includes a signal line defect detection circuit;
wherein the signal line repair circuit comprises:
a plurality of connection switches, wherein an input end of each connection switch is electrically connected to one signal line, and an output end thereof is electrically connected to another signal line;
a plurality of first shift circuits, wherein the plurality of first shift circuits are sequentially cascaded, and the plurality of first shift circuits are disposed in a one-to-one correspondence with the plurality of connection switches, wherein a shift output end of each first shift unit is electrically connected to a control end of a corresponding connection 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 to:
provide the signal for controlling the light-emitting display of the sub-pixels to the signal lines,
send, in response to determining that a disconnected signal line exists, a control signal to the signal line repair circuit to enable shift output ends of the plurality of first shift circuits to sequentially output enable signals, and
enable the first shift circuit corresponding to a connection switch electrically connected to the disconnected signal line to continuously output enable signals, to control the connection switch electrically connected to the disconnected signal line to be continuously turned on, so that the disconnected signal line is electrically connected to another signal line;

wherein the signal line defect detection circuit is electrically connected to the signal lines and configured to detect a defect of the signal lines, and the signal line defect detection circuit comprises:
a detection line, configured to transmit signals on the signal lines to the drive chip;
a reset line, configured to obtain a reset signal from the drive chip and transmit the reset signal to the detection line;
a plurality of detection switches, wherein the plurality of detection switches are disposed in a one-to-one correspondence with the plurality of signal lines, an input end of each detection switch is electrically connected to one signal line, an output end thereof is electrically connected to the detection line, and in response to the detection switch being turned on, a signal on the signal line electrically connected to the input end of the detection switch is transmitted to the detection line electrically connected to the output end of the detection switch; and
reset switches, wherein an input end of each reset switch is electrically connected to the repair line, and an output end thereof is electrically connected to the detection line, and wherein in response to the reset switch being turned on, a reset signal transmitted on the reset line electrically connected to the input end of the reset switch is transmitted to the detection line.

2. The display apparatus according to claim 1 , wherein any two adjacent signal lines among the plurality of signal lines electrically connected to the signal line repair circuit are electrically connected to the input end and the output end of a same connection switch, respectively.

3. The display apparatus according to claim 1 , wherein every two adjacent signal lines among the plurality of signal lines electrically connected to the signal line repair circuit are electrically connected to the input end and the output end of a same connection switch, respectively.

4. The display apparatus according to claim 1 , wherein at least one signal line electrically connected to another connection switch is comprised between two signal lines electrically connected to a same connection switch.

5. The display apparatus according to claim 4 ,
wherein the plurality of sub-pixels comprises at least sub-pixels with three light-emitting colors, sub-pixels in a same column have a same light-emitting color, and one signal line provides a signal to the sub-pixels in the same column; and
wherein one signal line electrically connected to the input end of each connection switch and one signal line electrically connected to the output end of the connection switch provide signals to sub-pixels of a same light-emitting color located in different columns, respectively.

6. The display apparatus according to claim 1 , wherein the signal line defect detection circuit comprises a plurality of reset switches, the detection switches and the reset switches are alternately disposed in a one-to-one correspondence, and the reset switches are turned on after the corresponding detection switches are turned on and then turned off.

7. The display apparatus according to claim 6 ,
wherein the signal line defect detection circuit further comprises a plurality of second shift circuits, and the plurality of second shift circuits comprises a plurality of first-type second shift circuits and a plurality of second-type second shift circuits;
wherein the first-type second shift circuits are electrically connected to the detection switches in a one-to-one correspondence, and signals output by shift output ends of the first-type second shift circuits control the detection switches electrically connected thereto to be turned on or turned off; and
wherein the second-type second shift circuits are electrically connected to the reset switches in a one-to-one correspondence, and signals output by shift output ends of the second-type second shift circuits control the reset switches electrically connected thereto to be turned on or turned off.

8. The display apparatus according to claim 7 , wherein the first-type second shift circuits and the second-type second shift circuits are sequentially and alternately disposed and cascaded.

9. The display apparatus according to claim 7 , wherein the plurality of first-type second shift circuits are sequentially cascaded, and the second-type second shift circuits are sequentially cascaded.

10. An electronic device, comprising:
a display apparatus, comprising:
a plurality of sub-pixels, wherein the sub-pixels are 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, respectively, and the plurality of signal lines provide signals 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
a non-display area that includes a signal line defect detection circuit;

wherein the signal line repair circuit comprises:
a plurality of connection switches, wherein an input end of each connection switch is electrically connected to one signal line, and an output end thereof is electrically connected to another signal line;
a plurality of first shift circuits, wherein the plurality of first shift circuits are sequentially cascaded, and the plurality of first shift circuits are disposed in a one-to-one correspondence with the plurality of connection switches, wherein a shift output end of each fir

Assignees

• Honor Device Co Ltd

Inventors

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

Classifications

• G09G3/006 Primary

  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

• G09G3/20

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G11C19/28

  using semiconductor elements (G11C19/14, G11C19/36 take precedence) · CPC title

• G09G2310/0286

  Details of a shift registers arranged for use in a driving circuit · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title