US 12,444,338 B2
Pixel circuit and driving method thereof, display substrate, and display device
Gang Wang, Beijing (CN); Kai Zhang, Beijing (CN); Xinyu Wei, Beijing (CN); Xingrui Cai, Beijing (CN); and Qiang Fu, Beijing (CN)
Assigned to Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 18/548,974
Filed by CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Sichuan (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Jul. 13, 2022, PCT No. PCT/CN2022/105457
§ 371(c)(1), (2) Date Sep. 5, 2023,
PCT Pub. No. WO2023/005669, PCT Pub. Date Feb. 2, 2023.
Claims priority of application No. PCT/CN2021/109894 (WO), filed on Jul. 30, 2021; and application No. 202110898582.X (CN), filed on Aug. 5, 2021.
Prior Publication US 2024/0185794 A1, Jun. 6, 2024
Int. Cl. G09G 3/20 (2006.01); G09G 3/3225 (2016.01); G09G 3/3233 (2016.01); G09G 3/3258 (2016.01); H10K 59/131 (2023.01)
CPC G09G 3/2007 (2013.01) [G09G 3/3225 (2013.01); G09G 3/3233 (2013.01); G09G 3/3258 (2013.01); H10K 59/131 (2023.02); G09G 2300/0408 (2013.01); G09G 2300/0426 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2300/0852 (2013.01); G09G 2300/0861 (2013.01); G09G 2310/0254 (2013.01); G09G 2310/061 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0247 (2013.01); G09G 2320/0252 (2013.01); G09G 2320/0257 (2013.01); G09G 2320/045 (2013.01); G09G 2320/0626 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A pixel circuit, comprising: a driving circuit, a data writing circuit and a reset circuit, wherein
the data writing circuit is coupled to a first scanning line, a data line and a second terminal of the driving circuit, and the data writing circuit is configured to control a connection between the data line and the second terminal of the driving circuit under control of a first scanning signal provided by the first scanning line;
the reset circuit is coupled to a third scanning line, a reset voltage line and the second terminal of the driving circuit, and the reset circuit is configured to: control, in a bias compensation phase under control of a third scanning signal provided by the third scanning line, the reset voltage line to be connected to the second terminal of the driving circuit without being connected to a control terminal of the driving circuit; or the reset circuit is coupled to the third scanning line, the reset voltage line and a first terminal of the driving circuit, and the reset circuit is configured to: control, in the bias compensation phase under control of the third scanning signal, the reset voltage line to be connected to the first terminal of the driving circuit without being connected to the control terminal of the driving circuit; and
the driving circuit is configured to control a connection between the first terminal of the driving circuit and the second terminal of the driving circuit under control of a potential of the control terminal of the driving circuit;
wherein the pixel circuit further comprises: a compensation control circuit, a first initialization circuit, a light-emitting control circuit, an energy storage circuit and a light-emitting element;
the compensation control circuit is electrically connected to a second scanning line, the control terminal of the driving circuit and the first terminal of the driving circuit, and the compensation control circuit is configured to control a connection between the control terminal of the driving circuit and the first terminal of the driving circuit under control of a second scanning signal provided by the second scanning line;
the first initialization circuit is coupled to an initialization control line, a first initialization voltage line and the control terminal of the driving circuit, the first initialization circuit is configured to control a connection between the first initialization voltage line and the control terminal of the driving circuit under control of an initialization control signal provided by the initialization control line;
the light-emitting control circuit is coupled to a light-emitting control line, the first terminal of the driving circuit and the light-emitting element, and the light-emitting control circuit is configured to control a connection between the first terminal of the driving circuit and the light-emitting element under control of a light-emitting control signal provided by the light-emitting control line;
the energy storage circuit is coupled to the control terminal of the driving circuit and the second terminal of the driving circuit; and
the first initialization voltage line is reused as the reset voltage line.