Invention Grant
- Patent Title: Photodetection apparatus less susceptible to interference from environmental light
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Application No.: US16769409Application Date: 2018-12-04
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Publication No.: US11280673B2Publication Date: 2022-03-22
- Inventor: Jiandong Huang
- Applicant: SHANGHAI HARVEST INTELLIGENCE TECHNOLOGY CO., LTD.
- Applicant Address: CN Shanghai
- Assignee: SHANGHAI HARVEST INTELLIGENCE TECHNOLOGY CO., LTD.
- Current Assignee: SHANGHAI HARVEST INTELLIGENCE TECHNOLOGY CO., LTD.
- Current Assignee Address: CN Shanghai
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: CN201711271086.1 20171205
- International Application: PCT/CN2018/119039 WO 20181204
- International Announcement: WO2019/109896 WO 20190613
- Main IPC: G01J1/46
- IPC: G01J1/46 ; G01J1/44

Abstract:
A photodetection apparatus includes at least one photodetection cell, each of which includes a first photodiode, a first switch, a capacitor, a second switch and a cancellation circuit. The first photodiode is to receive incident light, and converts the incident light received thereby into a first photocurrent. The cancellation circuit includes a second photodiode that is to receive the incident light and that converts the incident light received thereby into a second photocurrent. The cancellation circuit cooperates with the first photodiode and the first and second switches to adjust a residual electric quantity of the capacitor to a value correlated to a magnitude difference between the first and second photocurrents.
Public/Granted literature
- US20200300696A1 PHOTODETECTION APPARATUS Public/Granted day:2020-09-24
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