公开(公告)号：US11640785B1

公开(公告)日：2023-05-02

申请号：US17841701

申请日：2022-06-16

申请人： AU Optronics Corporation

发明人： Chia-En Wu ,  Ming-Hsien Lee ,  Shu-Han Chang ,  Chun-Shiang Dai

IPC分类号： G09G3/32

摘要： A pixel driving device includes a driving transistor, a pixel driving circuit, an optical sensor circuit, and a reset and reading circuit. Driving transistor controls a light emission device. Pixel driving circuit is connected to the driving transistor and resets according to a first sweep signal. Pixel driving circuit compensates according to a second sweep signal. Pixel driving circuit controls the driving transistor according to a driving signal to drive light emission device. Optical sensor circuit includes a node. Optical sensor circuit resets the node to a voltage level of the driving signal. Light sensing circuit performs sensing to generate a light sensing signal. Reset and reading circuit is connected to the driving transistor, the pixel driving circuit, and the optical sensor circuit. Reset and reading circuit receives a reset and reading signal so as to reset the pixel driving circuit and to read out the light sensing signal.