Invention Grant
- Patent Title: Light sensor with dark current elimination having duo switch-capacitor circuits and a reverse capacitor
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Application No.: US17952142Application Date: 2022-09-23
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Publication No.: US11703385B1Publication Date: 2023-07-18
- Inventor: Wen-Sheng Lin , Sheng-Cheng Lee , Yueh-Hung Ho , Chih-Wei Lin , Chen-Hua Hsi
- Applicant: Luxsentek Microelectronics Corp.
- Applicant Address: TW New Taipei
- Assignee: LUXSENTEK MICROELECTRONICS CORP.
- Current Assignee: LUXSENTEK MICROELECTRONICS CORP.
- Current Assignee Address: TW New Taipei
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Priority: TW 1120173 2022.05.31
- Main IPC: G01J1/46
- IPC: G01J1/46 ; G01J1/44 ; G01J1/42
Abstract:
The present invention provides a light sensor with dark current elimination. A dark current from a covered photodiode and a sensed current from a photodiode are respectively transformed to a dark voltage and a sensed voltage by a controlled integration circuit. A reverse capacitor receives the dark voltage and the sensed voltage to cancel out for each other, and outputs a corrected sensing voltage.
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