US 11,656,124 B1
Sensing device
Yuko Furui, Miao-Li County (TW); Akihiro Iwatsu, Miao-Li County (TW); and Shuji Hagino, Miao-Li County (TW)
Assigned to INNOLUX CORPORATION, Miao-Li County (TW)
Filed by InnoLux Corporation, Miao-Li County (TW)
Filed on Jan. 26, 2022, as Appl. No. 17/584,824.
Int. Cl. G01J 1/44 (2006.01)
CPC G01J 1/44 (2013.01) [G01J 2001/446 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A sensing device, comprising:
a first pixel circuit, wherein the first pixel circuit comprises:
a first transistor, comprising a first terminal electrically connected to a first node and a second terminal electrically connected to a first data line;
a second transistor, comprising a first terminal, a second terminal, and a control terminal, wherein the first terminal receives a first voltage, the second terminal is electrically connected to the first node, and the control terminal is electrically connected to a second node;
a third transistor, comprising a first terminal receiving a second voltage and a second terminal electrically connected the second node; and
a photodiode, comprising an anode and a cathode, wherein the anode is electrically connected to a third voltage and the cathode is electrically connected to the second node;
a readout circuit, electrically connected to the first pixel circuit;
a first switch, electrically connected between the first pixel circuit and the readout circuit;
a second switch, electrically connected between the first switch and the readout circuit;
and a first capacitor, comprising a first electrode, wherein the first electrode is electrically connected to the first switch and the second switch;
wherein during a first period, the first transistor and the first switch are turned on, and the first capacitor is charged;
wherein during a second period that follows the first period, the first transistor and the first switch are turned off and the second switch is turned on, and at least part of the charge of the first capacitor is distributed to generate an output signal.