US 12,394,373 B2
Pixel driving circuit and display panel
Liang Hu, Guangdong (CN)
Assigned to TCL China Star Optoelectronics Technology Co., Ltd., Shenzhen (CN)
Appl. No. 17/793,672
Filed by TCL China Star Optoelectronics Technology Co., Ltd., Guangdong (CN)
PCT Filed Jul. 1, 2022, PCT No. PCT/CN2022/103210
§ 371(c)(1), (2) Date Dec. 7, 2023,
PCT Pub. No. WO2023/231130, PCT Pub. Date Dec. 7, 2023.
Claims priority of application No. 202210615801.3 (CN), filed on May 31, 2022.
Prior Publication US 2024/0221640 A1, Jul. 4, 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 2300/0852 (2013.01); G09G 2320/0233 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pixel driving circuit, comprising:
a driving transistor connected in series with a light-emitting element between a first power supply line and a second power supply line, wherein a source electrode of the driving transistor is electrically connected to the light-emitting element;
a data transistor, wherein a source electrode of the data transistor is electrically connected to a data line, a drain electrode of the data transistor is electrically connected to a gate electrode of the driving transistor, and a gate electrode of the data transistor is configured to receive a data control signal; and
a boost module, wherein an input terminal of the boost module is configured to receive a boost input signal, and an output terminal of the boost module is electrically connected to the gate electrode of the driving transistor,
wherein in a first stage, the gate electrode of the driving transistor has a first voltage and the driving transistor is turned on to drive the light-emitting element to emit light at a first luminance;
in a second stage after the first stage, the boost module is configured to control a voltage of the gate electrode of the driving transistor to increase from the first voltage to a second voltage greater than the first voltage and the driving transistor is turned on to drive the light-emitting element to emit light at a second luminance greater than the first luminance; and
the boost module comprises:
a first capacitor, wherein a first plate of the first capacitor is electrically connected to the input terminal of the boost module to receive the boost input signal, and a second plate of the first capacitor is electrically connected to the gate electrode of the driving transistor; and
a second capacitor, wherein a first plate of the second capacitor is electrically connected to the gate electrode of the driving transistor, and a second plate of the second capacitor is configured to receive a first signal.