Ferro-electric liquid crystal electro-optical device having a drive voltage with DC and chopping components
US4793693A · kind A · utility
6Cited by
1References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Mar 2, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A ferro-electric crystal electro-optical device which uses switching between bi-stable states of ferro-electric liquid crystal molecules. A change from one of the stable states to the other is effected by applying a selected voltage having a combination of chopping pulse to which the liquid crystal molecules are not responsive and DC pulse to which the liquid crystal molecules are responsive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.