Display substrate and display device

Patent metadata

Field	Value
Publication number	US-12033573-B2
Application number	US-202117762334-A
Country	US
Kind code	B2
Filing date	May 7, 2021
Priority date	Nov 24, 2020
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

A display substrate and a display device are provided. Sub-pixels in a display substrate are divided into sub-pixel groups, wherein the sub-pixel groups include at least two sub-pixels, and at least two sub-pixels share the same pixel driving circuit; at least two light-emitting control sub-circuit in the pixel driving circuit correspond to at least two light-emitting element included in at least two sub-pixels, at least two light-emitting control sub-circuits correspond to at least two light-emitting control signal lines, and each light-emitting control sub-circuit is coupled to an output terminal of a compensation driving sub-circuit, a corresponding light-emitting element and a corresponding light-emitting control signal line; each light-emitting control sub-circuit is configured to control turning on or off a connection between the output terminal of the compensation driving sub-circuit and the corresponding light-emitting element under the control of the corresponding light-emitting control signal line.

First claim

What is claimed is:

1. A display substrate, comprising a substrate and a plurality of sub-pixels provided on the substrate, each sub-pixel comprising a light-emitting element;
wherein the plurality of sub-pixels is divided into a plurality of sub-pixel groups, the plurality of sub-pixel groups each comprises at least two sub-pixels, the at least two sub-pixels share the same pixel driving circuit, and the pixel driving circuit comprises:
at least two light-emitting control signal lines, at least part of each of the at least two light-emitting control signal lines extending in a first direction, and the at least two light-emitting control signal lines being arranged in a second direction, the second direction intersecting with the first direction;
a compensation driving sub-circuit, an output terminal of the compensation driving sub-circuit being configured to output a driving signal;
at least two light-emitting control sub-circuits, wherein the at least two light-emitting control sub-circuits correspond to at least two light-emitting elements comprised in the at least two sub-pixels, the at least two light-emitting control sub-circuits correspond to the at least two light-emitting control signal lines, and each of the at least two light-emitting control sub-circuits is directly coupled to the output terminal of the compensation driving sub-circuit, a corresponding light-emitting element and a corresponding light-emitting control signal line; each of the at least two light-emitting control sub-circuits is configured to control to a connection between the output terminal of the compensation driving sub-circuit and the corresponding light-emitting element to be connected or disconnected under the control of the corresponding light-emitting control signal line;
a second reset sub-circuit comprising a fifth transistor with a fifth active pattern, wherein the fifth active pattern is directly coupled to the at least two light-emitting control sub-circuits and directly coupled to a storage sub-circuit.

2. The display substrate of claim 1 , wherein the pixel driving circuit further comprises:
a reference signal line, at least part of the reference signal line extending in the first direction;
a first reset signal line, at least part of the first reset signal line extending in the first direction;
a gate line, at least part of the gate line extending in the first direction;
a power source line, at least part of the power source line extending in a second direction; and,
a data line, at least part of the data line extending in the second direction;
wherein the compensation driving sub-circuit comprises:
a driving sub-circuit, a first terminal of the driving sub-circuit is coupled to the power source line, and a second terminal of the driving sub-circuit is the output terminal of the compensation driving sub-circuit;
the storage sub-circuit, a first terminal of the storage sub-circuit is coupled to a control terminal of the driving sub-circuit, and a second terminal of the storage sub-circuit is coupled to the second terminal of the driving sub-circuit;
a first reset sub-circuit, coupled to the first reset signal line, the reference signal line and the control terminal of the driving sub-circuit; and
a data writing sub-circuit, coupled to the gate line, the data line and the control terminal of the driving sub-circuit.

3. The display substrate of claim 2 , wherein the at least two light-emitting control signal lines comprise a first light-emitting control signal line and a second light-emitting control signal line; the at least two light-emitting control sub-circuits comprise a first light-emitting control sub-circuit and a second light-emitting control sub-circuit; the at least two light-emitting elements comprise a first light-emitting element and a second light-emitting element;
the first light-emitting control sub-circuit is coupled to the second terminal of the driving sub-circuit, the first light-emitting control signal line and the first light-emitting element; the second light-emitting control sub-circuit is coupled to the second terminal of the driving sub-circuit, the second light-emitting control signal line, and the second light-emitting element.

4. The display substrate of claim 3 , wherein the first light-emitting control sub-circuit comprises a first transistor, the second light-emitting control sub-circuit comprises a second transistor, and the driving sub-circuit comprises a drive transistor; the storage sub-circuit comprises a storage capacitor;
a gate electrode of the drive transistor is reused as a first electrode plate of the storage capacitor;
a second electrode plate of the storage capacitor is located at a side of the first electrode plate facing away from the substrate, and the second electrode plate is coupled to a second electrode of the drive transistor;
a first electrode of the first transistor is coupled to the second electrode of the drive transistor, and a second electrode of the first transistor is coupled to the first light-emitting element;
a first electrode of the second transistor is coupled to the second electrode plate, and a second electrode of the second transistor is coupled to the second light-emitting element.

5. The display substrate of claim 4 , wherein the first transistor comprises a first active pattern, the first active pattern extends in the second direction; a first terminal of the first active pattern is coupled to the second electrode of the drive transistor; a second terminal of the first active pattern is coupled to the first light-emitting element;
an orthographic projection of the second terminal of the first active pattern onto the substrate is located between an orthographic projection of the first light-emitting control signal line onto the substrate and an orthographic projection of the second light-emitting control signal line onto the substrate.

6. The display substrate of claim 4 , wherein the second electrode plate comprises a body portion and an extension portion;
an orthographic projection of the body portion onto the substrate at least partially overlaps with an orthographic projection of the gate electrode of the drive transistor onto the substrate;
the extension portion extends in the second direction, and an orthographic projection of the extension portion onto the substrate overlaps with an orthographic projection of the first light-emitting control signal line onto the substrate and an orthographic projection of the second light-emitting control signal line onto the substrate.

7. The display substrate of claim 6 , wherein the second transistor comprises a second active pattern, at least part of the second active pattern extends in the second direction, a first terminal of the second active pattern is coupled to the extension portion, a second terminal of the second active pattern is coupled to the second light-emitting element;
an orthographic projection of the first terminal of the second active pattern onto the substrate is located between the orthographic projection of the first light-emitting control signal line onto the substrate and the orthographic projection of the second light-emitting control signal line onto the substrate.

8. The display substrate of claim 6 , wherein the pixel driving circuit further comprises:
an initialization signal line, at least part of the initialization signal line extending in the first direction;
a second reset signal line, at least part of the second reset signal line extending in the first direction; the first reset signal line, the gate line, the first light-emitting control signal line, the second light-emitting control signal line and the second reset signal line are arranged successively in the second direction;
wherein the sec

Assignees

• Boe Technology Group Co Ltd

Inventors

• Wang Hongrun
• Xu Pan
• Li Changfeng
• Zhang Hui
• Zhang Shunhang
• Hou Kai
• Liu Liwei
• Im Yunsik

Classifications

• G09G2310/0286

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

• G09G2300/0426

  Layout of electrodes and connections · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title

• G09G2300/0443

  with several sub-pixels for the same colour in a pixel, not specifically used to display gradations (G09G3/364 takes precedence) · CPC title

• G09G2300/0861

  with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes · CPC title