US 12,170,057 B2
Light-emitting circuit and display panel
Yamei Bai, Guangdong (CN); and Tianhong Wang, Guangdong (CN)
Assigned to Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen (CN)
Filed by Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Guangdong (CN)
Filed on Dec. 17, 2023, as Appl. No. 18/542,703.
Claims priority of application No. 202211711220.6 (CN), filed on Dec. 29, 2022.
Prior Publication US 2024/0221626 A1, Jul. 4, 2024
Int. Cl. G09G 3/32 (2016.01); G09G 3/3208 (2016.01); G09G 3/3233 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 3/3208 (2013.01); G09G 3/3233 (2013.01); G09G 2300/0426 (2013.01); G09G 2300/0842 (2013.01); G09G 2330/021 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A light-emitting circuit, comprising:
a first transistor, having a first electrode electrically connected to a first power line, a gate, and a second electrode;
a second transistor, having a first electrode electrically connected to the second electrode of the first transistor, a gate, and a second electrode;
a light-emitting element, having a first terminal electrically connected to the second electrode of the second transistor, and a second terminal electrically connected to a second power line;
a first switching circuit, having a first terminal electrically connected to a charging terminal, and a second terminal electrically connected to the gate of the first transistor, the gate of the second transistor, and the second electrode of the second transistor;
a second switching circuit, having a first terminal and a second terminal;
a first capacitor, electrically connected between the second terminal of the first switching circuit and the first terminal of the second switching circuit;
a current source, electrically connected between the second terminal of the second switching circuit and a third power line; and
a third switching circuit, having a first terminal electrically connected to the first electrode of the first transistor, and a second terminal electrically connected to the second electrode of the first transistor;
wherein the first switching circuit, the second switching circuit, and the third switching circuit are synchronously turned on or synchronously turned off.