Fingerprint identification system
US10521638B2 · kind B2 · utility
0Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2017 |
| Grant date | Dec 31, 2019 |
| Priority date | — |
| Expiry date | Dec 7, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention provides a fingerprint identification system includes a charge pump circuit configured to generate a supply voltage, wherein the charge pump circuit receives a first clock signal; a pixel circuit, forming a touch capacitance, determining whether the pixel circuit is corresponding to a finger valley or a finger ridge according to the touch capacitance, wherein the pixel circuit receives a second clock signal and the supply voltage; and a clock generating circuit, configured to generate the first clock signal and the second clock signal; wherein the first clock signal is related to the second clock signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.