Ferroelectric liquid crystal device and driving method therefor
US4941736A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1988 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Jul 29, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S359/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A ferroelectric liquid crystal device comprising: a pair of substrates each having a plurality of electrodes oppositely spaced from each other and intersecting with each other, and a ferroelectric liquid crystal layer disposed between the substrates and having a thickness small enough to release a helical structure in the absence of an electric field, a pixel being formed at each intersection of the opposite electrodes formed on the pair of substrates while leaving non-pixel portions at which the opposite electrodes do not face each other. The ferroelectric liquid crystal yields two stable orientation states providing two average molecular axes forming an angle 2.theta. therebetween under no electric field. The ferroelectric liquid crystal yields two states providing two average molecular axes forming an angle 2 .circle.H therebetween. The ferroelectric liquid crystal at the non-pixel portions forms an orientation state providing an average molecular axis forming an angle .theta. or -.theta..
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.