US 12,451,069 B2
Pixel circuit, driving method therefor, and display device
SeungWoo Han, Beijing (CN); Haoliang Zheng, Beijing (CN); Dongni Liu, Beijing (CN); Li Xiao, Beijing (CN); Liang Chen, Beijing (CN); Jiao Zhao, Beijing (CN); Xiaorong Cui, Beijing (CN); and Minghua Xuan, Beijing (CN)
Assigned to Beijing BOE Technology Development Co., Ltd., Beijing (CN)
Appl. No. 18/681,495
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Sep. 24, 2021, PCT No. PCT/CN2021/120479
§ 371(c)(1), (2) Date Feb. 5, 2024,
PCT Pub. No. WO2023/044816, PCT Pub. Date Mar. 30, 2023.
Prior Publication US 2025/0131878 A1, Apr. 24, 2025
Int. Cl. G09G 3/3233 (2016.01); G09G 3/20 (2006.01); G09G 3/32 (2016.01)
CPC G09G 3/3233 (2013.01) [G09G 3/2074 (2013.01); G09G 2300/0852 (2013.01); G09G 2300/0861 (2013.01); G09G 2320/0233 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A pixel circuit, comprising:
a current control circuit;
a duration control circuit; and
a light-emitting element; wherein
the current control circuit is configured for receiving a data signal and a first scan signal, and controlling an amplitude of a generated drive current according to the data signal and the first scan signal; and
the duration control circuit is configured for receiving a mode control signal, a pulse control signal, a light-emitting control signal and the drive current of the current control circuit, and is configured to control a length of time for providing the light-emitting element with the drive current according to an amplitude of the mode control signal;
wherein the duration control circuit comprises: a duration selection sub-circuit, a first duration control sub-circuit, a second duration control sub-circuit, and a light-emitting control circuit; wherein
the duration selection sub-circuit is connected with a first voltage end, a mode control signal end, a second scan signal end, a third scan signal end, a first node and a second node, and is configured for writing the mode control signal into the first node and the second node under control of the mode control signal, a second scan signal outputted by the second scan signal end and a third scan signal outputted by the third scan signal end;
the first duration control sub-circuit is connected with the first node, a third node and a pulse control signal end, and is configured for writing a pulse control signal of the pulse control signal end into the third node under control of a signal of the first node;
the second duration control sub-circuit is connected with the second node, the third node and a light-emitting control signal end, and is configured for writing a light-emitting control signal of the light-emitting control signal end into the third node under control of a signal of the second node; and
the light-emitting control circuit is connected with the third node, the first voltage end, and the current control circuit, and is configured for receiving the drive current, and controlling a duration of the drive current flowing through the light-emitting element under control of a signal of the third node, the light-emitting control signal outputted by the light-emitting control signal end, and the first scan signal outputted by a first scan signal end.
 
16. A driving method of a pixel circuit, for driving the pixel circuit, wherein the pixel circuit comprises a current control circuit, a duration control circuit, and a light-emitting element; and wherein the pixel circuit has a plurality of scanning cycles, and within one scanning cycle, the driving method comprises:
receiving, by the current control circuit, a data signal and a first scan signal, and controlling, by the current control circuit, an amplitude of a generated drive current according to the data signal and the first scan signal; and
receiving, by the duration control circuit, a mode control signal, a pulse control signal, a light-emitting control signal and the drive current of the current control circuit, and controlling, by the duration control circuit, a length of time for providing the light-emitting element with the drive current according to an amplitude of the mode control signal;
wherein the duration control circuit comprises: a duration selection sub-circuit, a first duration control sub-circuit, a second duration control sub-circuit, and a light-emitting control circuit; wherein
the duration selection sub-circuit is connected with a first voltage end, a mode control signal end, a second scan signal end, a third scan signal end, a first node and a second node, and is configured for writing the mode control signal into the first node and the second node under control of the mode control signal, a second scan signal outputted by the second scan signal end and a third scan signal outputted by the third scan signal end;
the first duration control sub-circuit is connected with the first node, a third node and a pulse control signal end, and is configured for writing a pulse control signal of the pulse control signal end into the third node under control of a signal of the first node;
the second duration control sub-circuit is connected with the second node, the third node and a light-emitting control signal end, and is configured for writing a light-emitting control signal of the light-emitting control signal end into the third node under control of a signal of the second node; and
the light-emitting control circuit is connected with the third node, the first voltage end, and the current control circuit, and is configured for receiving the drive current, and controlling a duration of the drive current flowing through the light-emitting element under control of a signal of the third node, the light-emitting control signal outputted by the light-emitting control signal end, and the first scan signal outputted by a first scan signal end.