US 11,810,500 B2
Micro light-emitting diode display panel and pixel driving circuit thereof
Kuan-Yung Liao, Miaoli County (TW); and Yi-Ching Chen, Miaoli County (TW)
Assigned to PLAYNITRIDE DISPLAY CO., LTD., Zhunan Township (TW)
Filed by PlayNitride Display Co., Ltd., Miaoli County (TW)
Filed on Jun. 27, 2022, as Appl. No. 17/850,432.
Claims priority of provisional application 63/215,996, filed on Jun. 29, 2021.
Prior Publication US 2022/0415247 A1, Dec. 29, 2022
Int. Cl. G09G 3/32 (2016.01); H01L 27/15 (2006.01)
CPC G09G 3/32 (2013.01) [H01L 27/156 (2013.01); G09G 2320/0233 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A pixel driving circuit is used for driving a light-emitting unit, wherein the light-emitting unit comprises a plurality of micro LEDs connected in series, the pixel driving circuit comprising:
a switch unit controlling a data signal input according to a scan signal;
a driving unit electrically connected to the switch unit and the light-emitting unit, and electrically connected to a first voltage; and
a selection unit receiving a selection signal input from a circuit other than the pixel driving circuit and electrically connected to a second voltage, wherein the selection unit is electrically connected to the micro LEDs and the driving unit, and the selection unit comprises a first selection transistor and a second selection transistor;
wherein, a number and a brightness of the micro LEDs in the light-emitting unit to be turned on are controlled by the selection unit and the driving unit according to the selection signal and the data signal.