US 12,260,799 B2
Pixel circuit, driving method thereof and display device
Yao Huang, Beijing (CN); Benlian Wang, Beijing (CN); Binyan Wang, Beijing (CN); Weiyun Huang, Beijing (CN); Cong Liu, Beijing (CN); and Kai Zhang, Beijing (CN)
Assigned to Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
Appl. No. 17/794,130
Filed by Chengdu BOE Optoelectronics Technology Co., Ltd., Sichuan (CN); and BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Sep. 9, 2021, PCT No. PCT/CN2021/117473
§ 371(c)(1), (2) Date Jul. 20, 2022,
PCT Pub. No. WO2023/004949, PCT Pub. Date Feb. 2, 2023.
Claims priority of application No. PCT/CN2021/109894 (WO), filed on Jul. 30, 2021.
Prior Publication US 2024/0203338 A1, Jun. 20, 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)] 11 Claims
OG exemplary drawing
 
1. A pixel circuit, comprising: a driving circuit, a data writing-in circuit and a reset circuit, wherein
the data writing-in circuit is respectively coupled to a first scan line, a data line and a second end of the driving circuit, and is configured to control to connect the data line and the second end of the driving circuit under the control of a first scan signal provided by the first scan line;
the reset circuit is respectively coupled to a third scan line, a reset voltage line and the second end of the driving circuit, and the reset circuit is configured to: in a bias voltage compensation phase of a display period, control to connect the reset voltage line and the second end of the driving circuit under the control of a third scan signal provided by the third scan line to supply a reset voltage to the second end of the driving circuit, such that the second end of the driving circuit is reset before a data signal is written by the data writing-in circuit;
the driving circuit is configured to control to connect the first end of the driving circuit and the second end of the driving circuit under the control of a potential of a control end of the driving circuit;
wherein the pixel circuit further comprises: a compensation control circuit, a first initialization circuit and a third initialization circuit;
the compensation control circuit is respectively electrically connected to a second scan line, the control end of the driving circuit and the first end of the driving circuit, and the compensation control circuit is configured to, in the bias voltage compensation phase of the display period, control to connect the control end of the driving circuit and the first end of the driving circuit under the control of a second scan signal provided by the second scan line;
the first initialization circuit is respectively coupled to the second scan line, a first initialization voltage line and a connection node, and the first initialization circuit is configured to, in the bias voltage compensation phase of the display period, control to connect the first initialization voltage line and the connection node under the control of the second scan signal;
the third initialization circuit is respectively coupled to a second light-emitting control line, the control end of the driving circuit and the connection node, and the third initialization circuit is configured to, in the bias voltage compensation phase of the display period, control to connect the control end of the driving circuit and the connection node under the control of a second light-emitting control signal provided by the second light-emitting control line;
wherein the pixel circuit further comprises: a light-emitting control circuit and a light-emitting element;
the light-emitting control circuit is respectively coupled to a first light-emitting control line, the first end of the driving circuit and the light-emitting element, and the light-emitting control circuit is configured to, in the bias voltage compensation phase of the display period, connect a first voltage line and the second end of the driving circuit under the control of the second light-emitting control signal; and
the light-emitting control circuit is further coupled to a second light-emitting control line, the first voltage line and the second end of the driving circuit, respectively, and the light-emitting control circuit is configured to, in a light-emitting phase of the display period, control to connect the first voltage line and the second end of the driving circuit under the control of the second light-emitting control signal provided by the second light-emitting control line; and
the driving circuit is configured to, in the light-emitting phase of the display period, drive, the light-emitting element to emit light.