Image reading apparatus containing light receiving transistors and switching transistors
US5991467A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Jul 10, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10722
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An inexpensive, miniaturized and thin image reading apparatus reads various types of images, such as fingerprints. The apparatus includes a transparent substrate. A light-emitting unit emits light to pass through the transparent substrate and to be applied to a subject pressed against the substrate. A plurality of light-receiving units are disposed on the substrate in the vertical and horizontal directions with intervals therebetween and receive the light which is emitted from the light-emitting unit and is reflected from the subject. A reading device reads an image of the subject in accordance with the amount of light received by the light-receiving units.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.