US 12,223,892 B2
Pixel circuit and display panel
Mian Zeng, Wuhan (CN); and Liang Sun, Wuhan (CN)
Assigned to Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Wuhan (CN)
Appl. No. 17/623,196
Filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Wuhan (CN)
PCT Filed Dec. 17, 2021, PCT No. PCT/CN2021/139160
§ 371(c)(1), (2) Date Dec. 27, 2021,
PCT Pub. No. WO2023/103038, PCT Pub. Date Jun. 15, 2023.
Claims priority of application No. 202111498869.X (CN), filed on Dec. 9, 2021.
Prior Publication US 2024/0046864 A1, Feb. 8, 2024
Int. Cl. G09G 3/3233 (2016.01); G09G 3/32 (2016.01)
CPC G09G 3/3233 (2013.01) [G09G 3/32 (2013.01); G09G 2300/0819 (2013.01); G09G 2300/0842 (2013.01); G09G 2300/0852 (2013.01); G09G 2300/0861 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0247 (2013.01); G09G 2320/045 (2013.01); G09G 2340/0435 (2013.01)] 16 Claims
OG exemplary drawing
 
14. A display panel, comprising a plurality of pixel units arranged in an array, each of the pixel units comprising a pixel circuit, the pixel circuit comprising:
a first transistor, having a gate receiving a first scan signal and a source receiving a data signal;
a driving transistor, having a source electrically connected to a drain of the first transistor;
a second transistor, having a first gate and a second gate receiving a second scan signal, a source electrically connected to a drain of the driving transistor, and a drain electrically connected to a gate of the driving transistor;
a third transistor, having a gate receiving a third scan signal, a source receiving a first initialization signal, and a drain electrically connected to the drain of the second transistor;
a fourth transistor, having a gate receiving a light emitting control signal, a source receiving a first power signal and a drain electrically connected to the source of the driving transistor;
a fifth transistor, having a gate receiving the light emitting control signal and a source electrically connected to the drain of the driving transistor;
a first capacitor, having an end electrically connected to the gate of the driving transistor, and another end receiving a first power signal; and
a light emitting device, having a positive electrode electrically connected to a drain of the fifth transistor, and a second electrode receiving a second power signal;
wherein the pixel circuit has a first working mode and a second working mode, and a display frequency of the first working mode is greater than a display frequency of the second working mode; and
wherein the first initialization signal is a DC signal in the first working mode and the first initialization signal is an AC signal in the second working mode.