Fingerprint signal processing system and fingerprint signal processing method
US11635849B1 · kind B1 · utility
0Cited by
2References
22Claims
0Family size
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Key dates
| Filing date | Oct 22, 2021 |
| Grant date | Apr 25, 2023 |
| Priority date | — |
| Expiry date | Dec 25, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1205
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A fingerprint signal processing system for a fingerprint sensor includes a calibration control circuit, a register circuit, a decode circuit and a normalization circuit. The calibration control circuit is configured to receive a background calibration control signal and an image signal from the fingerprint sensor, and convert the image signal into a plurality of digital signals according to a plurality of offsets. When the background calibration control signal is at a high level, the calibration control circuit is configured to read a plurality of calibration parameters from the register circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.