Active baseline signal cancellation in fingerprint sensors
US10074002B2 · kind B2 · utility
0Cited by
1References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 4, 2016 |
| Grant date | Sep 11, 2018 |
| Priority date | — |
| Expiry date | Dec 22, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1306
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one aspect, a fingerprint sensor chip includes an array of senor pixels. At least one of the sensor pixels is designated as a reference sensor pixel and remaining sensor pixels in the array are designated to contribute to fingerprint data, The sensor chip includes a signal processing unit including amplifier circuitry to cancel out baseline signals from output signals of remaining sensor pixels based at least on an output signal of the reference sensor pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.