Display device driving method

Patent metadata

Field	Value
Publication number	US-2020410947-A1
Application number	US-202017017868-A
Country	US
Kind code	A1
Filing date	Sep 11, 2020
Priority date	Sep 14, 2018
Publication date	Dec 31, 2020
Grant date	—

Abstract

A display device driving method is provided, which is applicable to a display device including pixel circuits coupled with a first node point, a source driving circuit for providing a data signal, and a reading circuit. The display device driving method includes operations: coupling the first node point with the source driving circuit or the reading circuit; supplying first control signals to the pixel circuits, where the first control signals sequentially provide a first impulse so that the pixel circuits sequentially receive the data signal from the first node point; supplying second control signals to optical sensing circuits, where the second control signals sequentially provide a second impulse so that the optical sensing circuits sequentially output a sensing signal to the first node point; amplifying the sensing signals and outputting the amplified sensing signals by the reading circuit, where durations of the first impulses the second impulses are not overlapped.

First claim

What is claimed is:

1 . A display device driving method, applicable to a display device, wherein the display device comprises a plurality of pixel circuits, a source driving circuit, and a reading circuit, the plurality of pixel circuits are coupled with a first node point, and the source driving circuit is configured to provide a data signal, the display device driving method comprising:
selectively coupling the first node point with the source driving circuit or the reading circuit; during a writing stage, supplying a plurality of first control signals to the plurality of pixel circuits, respectively, wherein the plurality of first control signals sequentially provide a first impulse so that the plurality of pixel circuits sequentially receive the data signal from the first node point; during a reading stage, supplying a plurality of second control signals to a plurality of optical sensing circuits, respectively, wherein the plurality of second control signals sequentially provide a second impulse so that the plurality of optical sensing circuits sequentially output a sensing signal to the first node point; and utilizing the reading circuit to amplify the plurality of sensing signals and output the amplified plurality of sensing signals, wherein duration of the plurality of first impulses are forbidden to overlap with duration of the plurality of second impulses.

2 . The display device driving method of claim 1 , wherein the operation of selectively coupling the first node point with the source driving circuit or the reading circuit comprises:
supplying a third control signal to a multiplexer; and supplying a fourth control signal to the multiplexer, wherein the third control signal is opposite to the fourth control signal, wherein the multiplexer is coupled with the first node point, the source driving circuit, and the reading circuit, and the third control signal and the fourth control signal is configured to control a switching operation of the multiplexer so that the first node point is selectively coupled with the source driving circuit or the reading circuit.

3 . The display device driving method of claim 2 , wherein during the writing stage, the third control signal provides a third impulse, duration of the third impulse overlaps with duration of the plurality of first impulses, and the duration of the third impulse is forbidden to overlap with duration of the plurality of second impulses.

4 . The display device driving method of claim 3 , wherein during the reading stage, the fourth control signal provides a fourth impulse, duration of the fourth impulse overlaps with the duration of the plurality of second impulses, and the duration of the fourth impulse is forbidden to overlap with the duration of the plurality of first impulses.

5 . The display device driving method of claim 2 , wherein the multiplexer comprises a first switch and a second switch, the first switch is coupled between the first node point and the source driving circuit, the second switch is coupled between the first node point and the reading circuit, and the operation of selectively coupling the first node point with the source driving circuit or the reading circuit further comprises:
supplying the third control signal to a control node of the first switch; and supplying the fourth control signal to a control node of the second switch.

Assignees

• Au Optronics Corp

Inventors

• Hung Chia-Che
• Cheng Mao-Hsun
• Yu Jian-Shen

Classifications

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title

• G09G2354/00

  Aspects of interface with display user · CPC title

• G09G3/3648 Primary

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

• G09G3/36 Primary

  using liquid crystals · CPC title

• G02F1/13624

  having more than one switching element per pixel · CPC title