Display substrate and drive method thereof, and display device

Patent metadata

Field	Value
Publication number	US-11915643-B2
Application number	US-202017267261-A
Country	US
Kind code	B2
Filing date	May 6, 2020
Priority date	May 6, 2020
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

A display substrate and a drive method thereof and a display device. The display substrate includes a base substrate and a plurality of sub-pixels on the base substrate, each sub-pixel includes a pixel circuit, and the pixel circuit includes a first reset sub-pixel. The first reset sub-pixel is configured to apply a first reset voltage to a light-emitting element in response to a first reset control voltage to reversely bias the light-emitting element.

First claim

What is claimed is:

1. A display substrate, comprising:
a base substrate; and
a plurality of sub-pixels, located on the base substrate and arranged in an array,
wherein each of the plurality of sub-pixels comprises a pixel circuit, and the pixel circuit is configured to drive a light-emitting element corresponding to the each of the plurality of sub-pixels to emit light;
each of the plurality of pixel circuits comprises a drive sub-circuit, a data write sub-circuit, a compensation sub-circuit, a storage sub-circuit, and a first reset sub-circuit;
the drive sub-circuit comprises a control terminal, a first terminal, and a second terminal, and the drive sub-circuit is configured to be connected with the light-emitting element and control a drive current flowing through the light-emitting element;
the data write sub-circuit is connected with the first terminal of the drive sub-circuit and is configured to write a data signal into the first terminal of the drive sub-circuit in response to a first scanning signal;
the compensation sub-circuit comprises a control terminal, a first terminal and a second terminal, and the control terminal of the compensation sub-circuit is configured to receive a second scanning signal, the first terminal and the second terminal of the compensation sub-circuit are respectively electrically connected with the control terminal and the second terminal of the drive sub-circuit, and the compensation sub-circuit is configured to compensate a threshold value of the drive sub-circuit in response to the second scanning signal;
the storage sub-circuit comprises a first terminal and a second terminal, the first terminal of the storage sub-circuit is configured to receive a first power supply voltage, and the second terminal of the storage sub-circuit is electrically connected with the control terminal of the drive sub-circuit;
the first reset sub-circuit comprises a control terminal, a first terminal, and a second terminal, the control terminal of the first reset sub-circuit is configured to receive a first reset control voltage, the first terminal of the first reset sub-circuit is configured to receive a first reset voltage, and the second terminal of the first reset sub-circuit is configured to be connected with the light-emitting element;
the first reset sub-circuit is configured to apply the first reset voltage to the light-emitting element to reversely bias the light-emitting element in response to the first reset control voltage; and
the plurality of sub-pixels comprise a first sub-pixel, the display substrate further comprises a first reset voltage terminal, and the first reset voltage terminal is configured to be connected with a first terminal of the first reset sub-circuit of the first sub-pixel to provide the first reset voltage to the first sub-pixel;
the plurality of sub-pixels are arranged in a plurality of pixel rows along a first direction and a plurality of pixel columns along a second direction, and the display substrate further comprises a first reset voltage line extended along the first direction, and the first reset voltage line is electrically connected with the first reset voltage terminal and the first terminal of the first reset sub-circuit respectively to provide the first reset voltage for the plurality of sub-pixels;
the plurality of sub-pixels further comprises a second sub-pixel, and the first sub-pixel and the second sub-pixel correspond to light-emitting elements emitting different colors;
the display substrate further comprises a second reset voltage terminal, and the second reset voltage terminal is configured to be connected with the first terminal of the first reset sub-circuit of the second sub-pixel to provide the first reset voltage to the second sub-pixel; and
the first reset voltage output by the first reset voltage terminal is different from the first reset voltage output by the second reset voltage terminal.

2. The display substrate according to claim 1 , wherein each of the plurality of pixel circuits further comprises a second reset sub-circuit, and
the second reset sub-circuit is connected with the control terminal of the drive sub-circuit and is configured to apply a second reset voltage to the control terminal of the drive sub-circuit in response to a second reset control voltage, to reset the control terminal of the drive sub-circuit.

3. The display substrate according to claim 2 , further comprising a third reset voltage terminal,
wherein the third reset voltage terminal is configured to be connected with the second reset sub-circuit to provide the second reset voltage, and
the second reset voltage output by the third reset voltage terminal is greater than the first reset voltage output by the first reset voltage terminal.

4. The display substrate according to claim 1 , further comprising a first reset signal line extended along the first direction, wherein
the first reset signal line is connected with the control terminal of the second reset sub-circuit to provide the second reset voltage, and
the first reset signal line is at a side of the first reset voltage line close to the base substrate, and the first reset signal line comprises a doped semiconductor material.

5. The display substrate according to claim 4 , further comprising a second reset signal line extended along the second direction,
wherein the second reset signal line is at a side of the first reset voltage line away from the base substrate and is electrically connected with the first reset signal line.

6. The display substrate according to claim 1 , wherein each of the plurality of pixel circuits further comprises a first connection electrode;
the first connection electrode is at a side of the first reset voltage line away from the base substrate, and is respectively electrically connected with the first terminal of the first reset sub-circuit and the first reset voltage line.

7. The display substrate according to claim 6 , wherein the storage sub-circuit comprises a storage capacitor, and the storage capacitor comprises a first capacitor electrode and a second capacitor electrode;
the first capacitor electrode and the first reset voltage line are in a same layer and insulated from each other, and the second capacitor electrode is at a side of the first capacitor electrode close to the base substrate.

8. The display substrate according to claim 7 , wherein each of the plurality of pixel circuits further comprises a second connection electrode;
the second connection electrode and the first connection electrode are in a same layer and insulated from each other, and the second connection electrode is respectively electrically connected with the second capacitor electrode and the first terminal of the compensation sub-circuit.

9. The display substrate according to claim 8 , wherein the first capacitor electrode comprises an opening, and the second connection electrode is insulated from the first capacitor electrode and is electrically connected with the second capacitor electrode through the opening.

10. The display substrate according to claim 6 , wherein each of the plurality of pixel circuits further comprises a third connection electrode;
the third connection electrode and the first connection electrode are in a same layer and insulated from each other, the third connection electrode comprises a first connection terminal and a second connection terminal, the first connection terminal is electrically connected with the second terminal of the first reset sub-circuit, and the second connection terminal is configured to be connected with the light-emitting element.

11. The display substrate according to claim 10 , wherein each of the plurality o

Assignees

• Chengdu Boe Optoelect Tech Co
• Boe Technology Group Co Ltd

Inventors

• Lu Hongting
• Feng Yuhsiung
• Mou Xin
• Chen Chenyu
• Zhao Shuang
• Yang Zhongliu
• Yang Jing
• Chen Wenbo

Classifications

• G09G3/3233 Primary

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• H10K59/1315

  comprising structures specially adapted for lowering the resistance · CPC title

• G09G2300/0408

  Integration of the drivers onto the display substrate · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title