Driver circuit for a contact imaging array
US5778089A · kind A · utility
91Cited by
7References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Mar 4, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1306
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A fingerprint sensing device and recognition system includes an array of closely spaced apart sensing elements each comprising a sensing electrode and an amplifier circuit. The device is used to sense electrical charge on a fingertip and obviates the need to pre-charge the sensing electrode. The device may be constructed with a single die or with multiple dies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.