Fingerprint recognition sensor capable of sensing fingerprint using optical and capacitive method
US10210373B2 · kind B2 · utility
4Cited by
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11Claims
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Key dates
| Filing date | Oct 31, 2013 |
| Grant date | Feb 19, 2019 |
| Priority date | — |
| Expiry date | Nov 2, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/76
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is a fingerprint recognition sensor capable of sensing a fingerprint using optical and capacitive methods, the sensor including: a capacitive fingerprint sensing unit that includes a transistor (T2) in which a flowing current is changed depending on an output voltage of a fingerprint sensing electrode capable of sensing the humans fingerprint; and an optical fingerprint sensing unit which changes the flowing current in the transistor (T2) due to a difference in reverse current of a photodiode generated by light and shade depending on existence or non-existence of the fingerprint.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.