US 12,424,173 B2
Pixel circuit, pixel driving method and display device
Yao Huang, Beijing (CN); Lang Liu, Beijing (CN); and Xinyu Wei, Beijing (CN)
Assigned to CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Sichuan (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 18/561,164
Filed by CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Sichuan (CN); and BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
PCT Filed Feb. 27, 2023, PCT No. PCT/CN2023/078421
§ 371(c)(1), (2) Date Nov. 15, 2023,
PCT Pub. No. WO2024/178537, PCT Pub. Date Sep. 6, 2024.
Prior Publication US 2025/0078765 A1, Mar. 6, 2025
Int. Cl. G09G 3/3266 (2016.01); G09G 3/3233 (2016.01); G09G 3/3258 (2016.01); G09G 3/3291 (2016.01)
CPC G09G 3/3266 (2013.01) [G09G 3/3258 (2013.01); G09G 3/3291 (2013.01); G09G 2310/08 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A pixel circuit, comprising a light-emitting element, a driving circuitry, a first energy storage circuitry, a second energy storage circuitry, a data writing circuitry and a compensation control circuitry, wherein a first end of the first energy storage circuitry is electrically coupled to a first node, a second end of the first energy storage circuitry is electrically coupled to a second node, and the first energy storage circuitry is configured to store electric energy;
a first end of the second energy storage circuitry is electrically coupled to the second node, a second end of the second energy storage circuitry is electrically coupled to a first voltage end, and the second energy storage circuitry is configured to store electric energy;
the data writing circuitry is electrically coupled to a first scanning end, a data line and the second node, and configured to write a data voltage from the data line into the second node under the control of a first scanning signal from the first scanning end;
the compensation control circuitry is electrically coupled to a second scanning end, the first node and a second end of the driving circuitry, and configured to control the first node to be electrically coupled to the second end of the driving circuitry under the control of a second scanning signal from the second scanning end;
a control end of the driving circuitry is electrically coupled to the first node, a first end of the driving circuitry is electrically coupled to a power source voltage end, the second end of the driving circuitry is electrically coupled to the light-emitting element, and the driving circuitry is configured to drive the light-emitting element under the control of a potential at the first node; and
an effective enabling time period of the second scanning end does not overlap with an effective enabling time period of the first scanning end, and a length of the effective enabling time period of the second scanning end is greater than a length of the effective enabling time period of the first scanning end;
wherein the pixel circuit further comprises a first light-emission control circuitry and a second light-emission control circuitry, wherein the first end of the driving circuitry is electrically coupled to the power source voltage end via the first light-emission control circuitry, the second end of the driving circuitry is electrically coupled to a first electrode of the light-emitting element via the second light-emission control circuitry, and a second electrode of the light-emitting element is electrically coupled to a second voltage end;
the first light-emission control circuitry is electrically coupled to a first light-emission control end, the power source voltage end and the first end of the driving circuitry, and configured to control the power source voltage end to be electrically coupled to the first end of the driving circuitry under the control of a first light-emission control signal from the first light-emission control end;
the second light-emission control circuitry is electrically coupled to a second light-emission control end, the second end of the driving circuitry and the first electrode of the light-emitting element, and configured to control the second end of the driving circuitry to be electrically coupled to the first electrode of the light-emitting element under the control of a second light-emission control signal from the second light-emission control end;
wherein the pixel circuit further comprises a first initialization circuitry and a second initialization circuitry, wherein the first initialization circuitry is electrically coupled to a first resetting control end, a first initial voltage end and the second end of the driving circuitry, and configured to write a first initial voltage from the first initial voltage end into the second end of the driving circuitry under the control of a first resetting control signal from the first resetting control end;
the second initialization circuitry is electrically coupled to a second resetting control end, a second initial voltage end and the first electrode of the light-emitting element, and configured to write a second initial voltage from the second initial voltage end into the first electrode of the light-emitting element under the control of a second resetting control signal from the second resetting control end; and
a length of an effective enabling time period of the first resetting control end is less than a length of the effective enabling time period of the second scanning end, and the effective enabling time period of the first resetting control end overlaps within the effective enabling time period of the second scanning end.