Electro-optical display device
US4413885A · kind A · utility
6Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1980 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Feb 11, 2000 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/1357
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electro-optical display device which comprises a twisted nematic liquid crystal layer and a photo-conducting layer. Two crossed electrode assemblies allow the liquid crystal to be made transparent at the points to be displayed. The light which passes at these points makes the photo-conductor conducting which applies the whole of the voltage to the liquid crystal and gives greater rapidity of inscription and a memory effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.