Fingerprint image input apparatus and method of producing the same
US5708497A · kind A · utility
14Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 5, 1996 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Aug 5, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1318
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The fingerprint image input apparatus includes two-dimensional image sensor 14 formed on transparent substrate 21 and including diffraction grating 41, photo-sensitive elements 24, switch elements 22, switching lines 25, signal reading lines 26, bias applying lines 27, and light interception plates 23 disposed below photo-sensitive elements 24, planar light source 11 and transparent protective film 42. Diffraction grating 41 is formed on two-dimensional image sensor 14 together with photo-sensitive elements 24 commonly using one or more opaque materials of photo-sensitive elements 24.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.