Fingerprint sensing with voltage pattern configurations
US9922231B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2017 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Jun 28, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1347
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of determining a representation of a physical property of a finger using a finger sensing system comprising a two-dimensional measuring arrangement including a plurality of measuring elements, each defining a measuring element position in the measuring arrangement, and each comprising a finger electrode spaced apart from the finger by a dielectric structure. For each of the measuring element positions, the method comprises providing a measuring configuration in which the finger electrode of a sensing measuring element defining the measuring element position exhibits a sensing finger electrode potential; the finger electrode of a first different measuring element exhibits a first different finger electrode potential; and the finger electrode of a second different measuring element exhibits a second different finger electrode potential; acquiring a measurement value based on a sensing signal; and determining the representation of the physical property of the finger based on a plurality of measurement values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.