US 12,190,775 B2
Pixel circuit and driving method therefor, display substrate, and display apparatus
Xinyu Wei, Beijing (CN); Kai Zhang, Beijing (CN); Qiang Fu, Beijing (CN); Gang Wang, Beijing (CN); Erlong Song, Beijing (CN); Hongmei Fan, Beijing (CN); and Kunyan Shi, Beijing (CN)
Assigned to Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 18/273,201
Filed by Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Jul. 8, 2022, PCT No. PCT/CN2022/104654
§ 371(c)(1), (2) Date Jul. 19, 2023,
PCT Pub. No. WO2023/005641, PCT Pub. Date Feb. 2, 2023.
Claims priority of application No. PCT/CN2021/109894 (WO), filed on Jul. 30, 2021; and application No. 202110897625.2 (CN), filed on Aug. 5, 2021.
Prior Publication US 2024/0153428 A1, May 9, 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)] 18 Claims
OG exemplary drawing
 
1. A pixel circuit, comprising:
a driving sub-circuit, comprising a control terminal connected to a first node, a first terminal connected to a second node, and a second terminal connected to a third node, and configured to control according to a voltage of the control terminal a driving current which flows from the second node to the third node and is used for driving a light emitting element;
a data writing sub-circuit, connected to the second node and configured to write a data signal to the second node in response to a first scanning signal;
a first light emitting control sub-circuit, connected to the second node and a first power voltage terminal and configured to write a first power voltage from the first power voltage terminal to the second node in response to a first light emitting control signal;
a first reset sub-circuit, connected to the first node and configured to write a first reset voltage to the first node in response to a first reset control signal; and
a bias sub-circuit, connected to the second node and configured to write a reference voltage to the second node in response to a bias control signal to switch on the driving sub-circuit, wherein an absolute value of a voltage difference between the reference voltage and the first reset voltage is a preset value, and
wherein the preset value is set such that an absolute value of a voltage difference between the control terminal and the first terminal of the driving sub-circuit is less than the preset value when the light emitting element is driven to emit light with a brightness of a highest gray level.