US 11,874,166 B2
Light sensor circuit
Wen-Cheng Chen, Zhubei (TW); Kai-Hsiang Chan, Zhubei (TW); and Sheng-Wen Huang, Zhubei (TW)
Assigned to Sensortek Technology Corp., Zhubei (TW)
Filed by SENSORTEK TECHNOLOGY CORP., Zhubei (TW)
Filed on Oct. 6, 2022, as Appl. No. 17/938,451.
Claims priority of provisional application 63/252,681, filed on Oct. 6, 2021.
Prior Publication US 2023/0243697 A1, Aug. 3, 2023
Int. Cl. G01J 1/46 (2006.01); G01J 1/02 (2006.01); G01J 1/44 (2006.01)
CPC G01J 1/46 (2013.01) [G01J 1/0228 (2013.01); G01J 2001/446 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A light sensor circuit, which includes:
a photodiode with an anode and a cathode; and
an integration unit including an integration input terminal, an integration output terminal, and an integration capacitor; and
a capacitor unit including a holding capacitor, a switch element, a first side and a second side, wherein two ends of the holding capacitor are the first side and the second side of the capacitor unit, respectively;
wherein the cathode of the photodiode is coupled to the first side of the capacitor unit, the integration input terminal is coupled to the second side of the capacitor unit, the two ends of the integration capacitor are respectively coupled to the first side of the capacitor unit and the integration output terminal, and the switch element is coupled between the anode of the photodiode and the first side of the capacitor unit.