Detector for recognizing the living character of a finger in a fingerprint recognizing apparatus
US6175641A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1998 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | Apr 2, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1394
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Detector for recognizing the living character of a finger which is arranged in a fingerprint recognizing apparatus and the detector is in contact with a print area (2) of the living finger constituting a print forming element (1) and the apparatus comprises for the examination of the print area (2) a print detector (5) which has a print imaging surface (4) partially covered by the print area (2). The detector comprises an electrode system (3) made of an electrically conductive material and sensing the presence of the print forming element (1), and an electrical evaluation unit coupled through electrical contacts (10) to the electrode system (3), the unit senses the change in state in the electrode system (3) caused by the proximity of the print forming element (1). The electrode system (3) is arranged on a portion of the print detector (5) covered by the print area (2) and it is coupled to the print imaging surface (4).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.