Live finger detection
US8374407B2 · kind B2 · utility
32Cited by
186References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2009 |
| Grant date | Feb 12, 2013 |
| Priority date | — |
| Expiry date | Aug 19, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1394
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A live finger detection system and method includes a drive plate configured to inject radio frequency signals into an object proximate the drive plate. The injected radio frequency energy causes the object to radiate an electric field. A pickup plate is configured to detect an intensity associated with the electric field radiated by the object. A sensor coupled to the pickup plate is configured to determine whether the object is a live finger based on the detected intensity of the electric field radiated by the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.