Fingerprint sensing arrangement and a method for filtering a fingerprint pattern signal
US11216633B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2019 |
| Grant date | Jan 4, 2022 |
| Priority date | — |
| Expiry date | Mar 4, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/36
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to providing a filtered fingerprint pattern signal indicative of a fingerprint pattern with a fingerprint sensing device comprising an array of sensing elements for sensing the fingerprint pattern. Each sensing element is configured to provide a sensing signal indicative of a local fingerprint pattern feature. The method comprises: receiving analog sensing signals from each of a set of sensing elements comprising at least four sensing elements, filtering the set of sensing signals to provide a set of filtered output signals each comprising a linear combination of the set of sensing signals in which each sensing signal has a respective coefficient. The coefficients in each linear combination sum up to zero, and wherein the linear combinations are different from each other. The set of filtered output signals are converted to a filtered digital sensing signal indicative of the user's fingerprint pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.