Method and electronic device for detecting finger-on or finger-off
US10755066B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2017 |
| Grant date | Aug 25, 2020 |
| Priority date | — |
| Expiry date | Nov 13, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1306
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for detecting finger-on or finger-off, including: detecting whether a sensing capacitance value of a sensing signal is higher than a high threshold or lower than a low threshold; and when the sensing capacitance value of the sensing signal is higher than the high threshold, determining that a finger is placed on the fingerprint sensing device and adjusting the high threshold and the low threshold according to the sensing capacitance value and a compensation value, and when the sensing capacitance value of the sensing signal is lower than the low threshold, determining that a finger is removed from the fingerprint sensing device and adjusting the high threshold and the low threshold according to the sensing capacitance value and the compensation value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.