IP Library › Granted Patent US 11,011,103
Granted Patent B2
US 11,011,103 · App. 16/488,921 · Granted May 18, 2021

Pixel circuit and display device including light emission control circuit

Inventors: Han Yue (Beijing, CN); Ming Yang (Beijing, CN); Can Wang (Beijing, CN); Can Zhang (Beijing, CN); Minghua Xuan (Beijing, CN); Xiaochuan Chen (Beijing, CN)
Assignee: BOE Technology Group Co., Ltd.
G09G3/32G09G3/3258G09G2300/0426G09G2320/0626
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Quick Facts
Patent No.
US 11,011,103
App. No.
16/488,921
Granted
May 18, 2021
Kind
B2
Abstract

A pixel circuit includes a first driving circuit, a light-emitting element, a second driving circuit, an energy storage circuit and an input circuit. A first end of the first driving circuit is connected to a power source voltage input end. An anode of the light-emitting element is connected to a second end of the first driving circuit. A first end of the second driving circuit is connected to a first level signal input end, a second end thereof is connected to a cathode of the light-emitting element. The energy storage circuit is connected to control ends of the first driving circuit and the second driving circuit, a second level signal input end. The input circuit is connected to a data signal input end, an input control end, the control end of the first driving circuit and the control end of the second driving circuit.

Claims (44)

1. A pixel circuit, comprising:

a first driving circuit, a first end of the first driving circuit is connected to a power source voltage input end;

a light-emitting element, an anode of the light-emitting element is connected to a second end of the first driving circuit;

a second driving circuit, a first end of the second driving circuit is connected to a first level signal input end, and a second end of the second driving circuit is connected to a cathode of the light-emitting element;

an energy storage circuit connected to a control end of the first driving circuit, a control end of the second driving circuit and a second level signal input end; and

an input circuit connected to a data signal input end, an input control end, the control end of the first driving circuit and the control end of the second driving circuit, and configured to control the data signal input end to be electrically connected to, or electrically disconnected from, the control end of the first driving circuit, and control the data signal input end to be electrically connected to, or electrically disconnected from, the control end of the second driving circuit under the control of the input control end,

wherein the pixel circuit further comprises a light-emission control circuit, the first end of the second driving circuit is connected to the first level signal input end via the light-emission control circuit, the light-emission control circuit is connected to a light-emission control end, the first end of the second driving circuit and the first level signal input end, and configured to control the first end of the second driving circuit to be electrically connected to, or electrically disconnected from, the first level signal input end under the control of the light-emission control end.

2. The pixel circuit according to claim 1 , wherein the input control end comprises a first input control end and a second input control end, and

wherein the input circuit comprises:

a first input sub-circuit connected to the data signal input end, the first input control end and the control end of the first driving circuit, and configured to control the data signal input end to be electrically connected to, or electrically disconnected from, the control end of the first driving circuit under the control of the first input control end; and

a second input sub-circuit connected to the data signal input end, the second input control end and the control end of the second driving circuit, and configured to control the data signal input end to be electrically connected to, or electrically disconnected from, the control end of the second driving circuit under the control of the second input control end.

3. The pixel circuit according to claim 2 , wherein the first input sub-circuit comprises a first switching transistor, a gate electrode of the first switching transistor is connected to the first input control end, a first electrode of the first switching transistor is connected to the data signal input end, and a second electrode of the first switching transistor is connected to the control end of the first driving circuit, and

wherein the second input sub-circuit comprises a second switching transistor, a gate electrode of the second switching transistor is connected to the second input control end, a first electrode of the second switching transistor is connected to the data signal input end, and a second electrode of the second switching transistor is connected to the control end of the second driving circuit.

4. The pixel circuit according to claim 3 , wherein the first driving circuit comprises a first driving transistor, the control end of the first driving circuit comprises a gate electrode of the first driving transistor, the first end of the first driving circuit comprises a first electrode of the first driving transistor, and the second end of the first driving circuit comprises a second electrode of the first driving transistor, and

wherein the second driving circuit comprises a second driving transistor, the control end of the second driving circuit comprises a gate electrode of the second driving transistor, the first end of the second driving circuit comprises a first electrode of the second driving transistor, and the second end of the second driving circuit comprises a second electrode of the second driving transistor.

5. The pixel circuit according to claim 3 , wherein the energy storage sub-circuit comprises:

a first energy storage sub-circuit, a first end of the first energy storage sub-circuit being connected to the control end of the first driving circuit, and a second end of the first energy storage sub-circuit is connected to the second level signal input end; and

a second energy storage sub-circuit, a first end of the second energy storage sub-circuit being connected to the control end of the second driving circuit, and a second end of the second energy storage sub-circuit is connected to the second level signal input end.

6. The pixel circuit according to claim 2 , wherein the first driving circuit comprises a first driving transistor, the control end of the first driving circuit comprises a gate electrode of the first driving transistor, the first end of the first driving circuit comprises a first electrode of the first driving transistor, and the second end of the first driving circuit comprises a second electrode of the first driving transistor, and

wherein the second driving circuit comprises a second driving transistor, the control end of the second driving circuit comprises a gate electrode of the second driving transistor, the first end of the second driving circuit comprises a first electrode of the second driving transistor, and the second end of the second driving circuit comprises a second electrode of the second driving transistor.

7. The pixel circuit according to claim 2 , wherein the energy storage sub-circuit comprises:

a first energy storage sub-circuit, a first end of the first energy storage sub-circuit being connected to the control end of the first driving circuit, and a second end of the first energy storage sub-circuit is connected to the second level signal input end; and

a second energy storage sub-circuit, a first end of the second energy storage sub-circuit being connected to the control end of the second driving circuit, and a second end of the second energy storage sub-circuit is connected to the second level signal input end.

8. The pixel circuit according to claim 1 , wherein the data signal input end comprises a first data signal input end and a second data signal input end, and

wherein the input circuit comprises:

a third input sub-circuit connected to the first data signal input end, the input control end and the control end of the first driving circuit, and configured to control the first data signal input end to be electrically connected to, or electrically disconnected from, the control end of the first driving circuit under the control of the input control end; and

a fourth input sub-circuit connected to the second data signal input end, the input control end and the control end of the second driving circuit, and configured to control the second data signal input end to be electrically connected to, or electrically disconnected from, the control end of the second driving circuit under the control of the input control end.

9. The pixel circuit according to claim 8 , wherein the third input sub-circuit comprises a third switching transistor, a gate electrode of the third switching transistor is connected to the input control end, a first electrode of the third switching transistor is connected to the first data signal input end, and a second electrode of the third switching transistor is connected to the control end of the first driving circuit, and

wherein the fourth input sub-circuit comprises a fourth switching transistor, a gate electrode of the fourth switching transistor is connected to the input control end, a first electrode of the fourth switching transistor is connected to the second data signal input end, and a second electrode of the fourth switching transistor is connected to the control end of the second driving circuit.

10. The pixel circuit according to claim 8 , wherein the first driving circuit comprises a first driving transistor, the control end of the first driving circuit comprises a gate electrode of the first driving transistor, the first end of the first driving circuit comprises a first electrode of the first driving transistor, and the second end of the first driving circuit comprises a second electrode of the first driving transistor, and

wherein the second driving circuit comprises a second driving transistor, the control end of the second driving circuit comprises a gate electrode of the second driving transistor, the first end of the second driving circuit comprises a first electrode of the second driving transistor, and the second end of the second driving circuit comprises a second electrode of the second driving transistor.

11. The pixel circuit according to claim 8 , wherein the energy storage sub-circuit comprises:

a first energy storage sub-circuit, a first end of the first energy storage sub-circuit being connected to the control end of the first driving circuit, and a second end of the first energy storage sub-circuit is connected to the second level signal input end; and

a second energy storage sub-circuit, a first end of the second energy storage sub-circuit being connected to the control end of the second driving circuit, and a second end of the second energy storage sub-circuit is connected to the second level signal input end.

12. The pixel circuit according to claim 1 , wherein the first driving circuit comprises a first driving transistor, the control end of the first driving circuit comprises a gate electrode of the first driving transistor, the first end of the first driving circuit comprises a first electrode of the first driving transistor, and the second end of the first driving circuit comprises a second electrode of the first driving transistor, and

wherein the second driving circuit comprises a second driving transistor, the control end of the second driving circuit comprises a gate electrode of the second driving transistor, the first end of the second driving circuit comprises a first electrode of the second driving transistor, and the second end of the second driving circuit comprises a second electrode of the second driving transistor.

13. The pixel circuit according to claim 1 , wherein the light-emission control circuit comprises a fifth switching transistor, a gate electrode of the fifth switching transistor is connected to the light-emission control end, a first electrode of the fifth switching transistor is connected to the first end of the second driving circuit, and a second electrode of the fifth switching transistor is connected to the first level signal input end.

14. The pixel circuit according to claim 1 , wherein the energy storage sub-circuit comprises:

a first energy storage sub-circuit, a first end of the first energy storage sub-circuit being connected to the control end of the first driving circuit, and a second end of the first energy storage sub-circuit is connected to the second level signal input end; and

a second energy storage sub-circuit, a first end of the second energy storage sub-circuit being connected to the control end of the second driving circuit, and a second end of the second energy storage sub-circuit is connected to the second level signal input end.

15. The pixel circuit according to claim 14 , wherein: the first energy storage sub-circuit comprises a first capacitor, and the second energy storage sub-circuit comprises a second capacitor;

a first end of the first capacitor is connected to the control end of the first driving circuit, and a second end of the first capacitor is connected to the second level signal input end; and

a first end of the second capacitor is connected to the control end of the second driving circuit, and a second end of the second capacitor is connected to the second level signal input end.

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

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 27, 2022
From: BOE TECHNOLOGY GROUP CO., LTD.
To: BEIJING BOE TECHNOLOGY DEVELOPMENT CO., LTD.
Reel/Frame 060826/0252 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 27, 2019
From: YUE, HAN; YANG, MING; WANG, CAN; ZHANG, CAN; XUAN, MINGHUA; CHEN, XIAOCHUAN
To: BOE TECHNOLOGY GROUP CO., LTD.
Reel/Frame 050182/0948 →
Priority Claims (1)
CN 201820624128.9 · Apr 27, 2018 · national
Continuity (1)
Related Publication 20200302855A1 · Sep 24, 2020