Invention Grant
- Patent Title: Optical fingerprint sensor with spoof detection and associated method
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Application No.: US17469461Application Date: 2021-09-08
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Publication No.: US11842563B2Publication Date: 2023-12-12
- Inventor: Paul Wickboldt , Jau-Jan Deng , Shih-Hsin Hsu
- Applicant: OmniVision Technologies, Inc.
- Applicant Address: US CA Santa Clara
- Assignee: OmniVision Technologies, Inc.
- Current Assignee: OmniVision Technologies, Inc.
- Current Assignee Address: US CA Santa Clara
- Agency: COZEN O'CONNOR
- Main IPC: G06V40/12
- IPC: G06V40/12 ; G06F3/041 ; G06F3/042 ; G06V40/13

Abstract:
An optical fingerprint sensor with spoof detection includes a plurality of lenses, an image sensor including a pixel array that includes a plurality of first photodiodes and a plurality of second photodiodes, and at least one apertured baffle-layer having a plurality of aperture stops, wherein each second photodiode is configured to detect light having passed through a lens and at least one aperture stop not aligned with the lens along an optical axis. A method for detecting spoof fingerprints detected using an optical fingerprint sensor includes detecting large-angle light incident on a plurality of anti-spoof photodiodes, wherein the plurality of anti-spoof photodiodes is interleaved with a plurality of imaging photodiodes, determining an angular distribution of light based at least in part one the large-angle light, and detecting spoof fingerprints based at least in part on the angular distribution of light.
Public/Granted literature
- US20230072103A1 OPTICAL FINGERPRINT SENSOR WITH SPOOF DETECTION AND ASSOCIATED METHOD Public/Granted day:2023-03-09
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