Fingerprint sensor with impedance detection
US11328536B2 · kind B2 · utility
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7Claims
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Assignee
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Key dates
| Filing date | Nov 27, 2020 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Nov 27, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1365
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A fingerprint detection device comprising a support having a bearing surface, a sensor arranged to capture an image of a dermatoglyph of a user's finger placed on the bearing surface, and an impedance-measuring electronic circuit connected to electrodes extending on the bearing surface, conductive tracks extending on the bearing surface between the electrodes and the impedance-measuring electronic circuit. At least two of the electrodes are connected to the impedance-measuring electronic circuit by at least two conductive tracks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.