Elongate thin-film reader
US4419696A · kind A · utility
34Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1981 |
| Grant date | Dec 6, 1983 |
| Priority date | — |
| Expiry date | Dec 10, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F77/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A manuscript reader comprises an amorphous silicon film sandwiched between at least one transparent electrode and a plurality of metal electrodes formed on an insulating substrate. If the reader includes a plurality of sensors, the detection circuitry can vary a comparison threshold level during the course of one scanning operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.