IP Library › Granted Patent US 12,676,111
Granted Patent B2
US 12,676,111 · App. 18/695,638 · Granted Jul 7, 2026

Pixel circuit, driving method and display device

Inventors: Changlong Yuan (Beijing, CN); Baoxi Wang (Beijing, CN); Jingyi Feng (Beijing, CN); Li Zhu (Beijing, CN); Zhenhua Zhang (Beijing, CN); Xilei Cao (Beijing, CN); Wulin Shen (Beijing, CN); Xiaoxiao Wang (Beijing, CN); Yao Hu (Beijing, CN); Zhen Liu (Beijing, CN); Mengmeng Du (Beijing, CN)
Assignees: BOE TECHNOLOGY GROUP CO., LTD; CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.; BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD.
G09G3/3233G09G2300/0842G09G2310/061G09G2310/08G09G2320/0233
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Quick Facts
Patent No.
US 12,676,111
App. No.
18/695,638
Granted
Jul 7, 2026
Kind
B2
Abstract

A pixel circuit, a driving method, and a display device are provided. The pixel circuit includes a light emitting element, a driving circuit, a first energy storage circuit, a first setting circuit, a second setting circuit and a light emitting control circuit. The first setting circuit controls to connect the first setting voltage terminal and the first node under the control of the first control signal provided by the first control terminal; the second setting circuit controls to connect the second setting voltage terminal and the second terminal of the first energy storage circuit under the control of the second control signal provided by the second control terminal.

Claims (49)

1 . A pixel circuit, comprising a light emitting element, a driving circuit, a first energy storage circuit, a first setting circuit, a second setting circuit and a light emitting control circuit; wherein:

the light emitting control circuit is electrically connected to a light emitting control terminal, a first voltage terminal and a first terminal of the driving circuit respectively, and is configured to control to connect the first voltage terminal and the first terminal of the driving circuit under the control of a light emitting control signal provided by the light emitting control terminal;

a control terminal of the driving circuit is electrically connected to a first node, and a second terminal of the driving circuit is electrically connected to a first electrode of the light emitting element, the driving circuit is configured to control to connect the first voltage terminal and the first electrode of the light emitting element under the control of a potential of the first node;

the first electrode of the light emitting element is electrically connected to a second node; a second electrode of the light emitting element is electrically connected to a second voltage terminal;

a first terminal of the first energy storage circuit is electrically connected to the first node, and a second terminal of the first energy storage circuit is electrically connected to a third node, the first energy storage circuit is configured to store electrical energy; the second node is electrically connected to the third node;

the first setting circuit is electrically connected to a first control terminal, a first setting voltage terminal and the first node respectively, and is configured to control to connect the first setting voltage terminal and the first node under the control of a first control signal provided by the first control terminal;

the second setting circuit is electrically connected to a second control terminal, a second setting voltage terminal and a second terminal of the first energy storage circuit respectively, and is configured to control to connect the second setting voltage terminal and the second terminal of the first energy storage circuit under the control of a second control signal provided by the second control terminal;

the pixel circuit further comprises a third setting circuit; and

the third setting circuit is electrically connected to a third control terminal, a third setting voltage terminal and the third node respectively, and is configured to write a third setting voltage provided by the third setting voltage terminal into the third node under the control of a third control signal provided by the third control terminal.

2 . The pixel circuit according to claim 1 , further comprising a data writing-in circuit;

wherein the data writing-in circuit is electrically connected to a scanning terminal, a data line and the first node respectively, and is configured to write a data voltage provided by the data line into the first node under the control of a scanning signal provided by the scanning terminal.

3 . The pixel circuit according to claim 1 , further comprising a second energy storage circuit; wherein

the third node is electrically connected to the second node through the second energy storage circuit;

a first terminal of the second energy storage circuit is electrically connected to the third node, a second terminal of the second energy storage circuit is electrically connected to the second node, and the second energy storage circuit is configured to store electrical energy.

4 . The pixel circuit according to claim 1 , wherein the first control terminal and the second control terminal are a same control terminal.

5 . The pixel circuit according to claim 1 , further comprising a data writing-in circuit; wherein

the data writing-in circuit is electrically connected to the scanning terminal, the data line and the first node respectively, and is configured to write the data voltage provided by the data line into the first node under the control of the scanning signal provided by the scanning terminal;

the third control terminal and the scanning terminal are a same control terminal.

6 . The pixel circuit according to claim 1 , further comprising a fourth setting circuit;

wherein the fourth setting circuit is electrically connected to a fourth control terminal, a fourth setting voltage terminal and the second node respectively, and is configured to write a fourth setting voltage provided by the fourth setting voltage terminal into the second node under the control of a fourth control signal provided by the fourth control terminal.

7 . The pixel circuit according to claim 6 , wherein the first control terminal and the fourth control terminal are a same control terminal.

8 . The pixel circuit according to claim 1 , wherein the pixel circuit includes a fourth setting circuit;

the fourth setting circuit is electrically connected to a fourth control terminal, the third node and the second node respectively, and is configured to connect the third node and the second node under the control of the fourth control signal provided by the fourth control terminal;

the second setting voltage terminal and the third setting voltage terminal are a same setting voltage.

9 . The pixel circuit according to claim 3 , wherein the pixel circuit further comprises a first control circuit;

the first terminal of the first energy storage circuit is electrically connected to the first node through the first control circuit;

the first terminal of the first energy storage circuit is directly electrically connected to a fourth node;

the first control circuit is electrically connected to a fifth control terminal, and is configured to control to connect the first node and the fourth node under the control of a fifth control signal provided by the fifth control terminal.

10 . The pixel circuit according to claim 9 , further comprising a data writing-in circuit;

wherein the data writing-in circuit is electrically connected to the scanning terminal, the data line and the fourth node respectively, and is configured to write the data voltage provided by the data line into the fourth node under the control of the scanning signal provided by the scanning terminal.

11 . The pixel circuit according to claim 9 , wherein the second setting voltage terminal is electrically connected to the first node.

12 . The pixel circuit according to claim 1 , wherein the first setting voltage terminal is electrically connected to the third node.

13 . The pixel circuit according to claim 1 , wherein the first setting voltage terminal and the first voltage terminal are a same voltage terminal.

14 . The pixel circuit according to claim 10 , further comprising a second control circuit;

wherein the second control circuit is electrically connected to the light emitting control terminal, the second terminal of the driving circuit and the first electrode of the light emitting element respectively, and is configured to control to connect the second terminal of the driving circuit and the first electrode of the light emitting element under the control of the light emitting control signal.

15 . The pixel circuit according to claim 10 , further comprising a fourth setting circuit; wherein

the fourth setting circuit is electrically connected to a fourth control terminal, a fourth setting voltage terminal and the second node respectively, and is configured to write the fourth setting voltage provided by the fourth setting voltage terminal into the second node under the control of the fourth control signal provided by the fourth control terminal;

the second setting voltage terminal and the fourth setting voltage terminal are a same voltage terminal,

wherein the second voltage terminal and the fourth setting voltage terminal are a same voltage terminal.

16 . The pixel circuit according to claim 2 , wherein the pixel circuit further includes a fourth setting circuit;

the fourth setting circuit is electrically connected to a fourth control terminal, a fourth setting voltage terminal and the second node respectively, and is configured to write the fourth setting voltage provided by the fourth setting voltage terminal into the second node under the control of the fourth control signal provided by the fourth control terminal;

the fourth control terminal and the scanning terminal are a same control terminal.

17 . The pixel circuit according to claim 15 , wherein the third node is electrically connected to the fourth setting voltage terminal.

18 . A driving method, applied to the pixel circuit according to claim 1 , comprising:

controlling, by the light emitting control circuit, to connect the first voltage terminal and the first terminal of the driving circuit under the control of the light emitting control signal;

controlling, by the driving circuit, to connect the first voltage terminal and the first electrode of the light emitting element under the control of the potential of the first node;

controlling, by the first setting circuit, to connect the first setting voltage terminal and the first node under the control of the first control signal;

controlling, by the second setting circuit, to connect the second setting voltage terminal and the first energy storage circuit under the control of the second control signal.

19 . A display device comprising the pixel circuit according to claim 1 .