Sensing display apparatus of image pattern
US4881900A · kind A · utility
17Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 1987 |
| Grant date | Nov 21, 1989 |
| Priority date | — |
| Expiry date | Jul 21, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09B21/003
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Selecting switches are provided near a converter for converting an optical image into an electric signal, thereby enabling the electric signal before or after it was stored to be effectively selected. A plurality of convertors are provided and when an electric signal is not output from one of the convertors, the other convertors can be used. The analog electric signal output from the converter is binarized by a reference level signal before it fluctuates. An electric power consumption when the apparatus is not used is prevented by a power controller arranged near a sensing display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.