Liquid crystal device with phenylenevinylene or phenylene sulfide alignment films having particular high electrical conductivity
US5239398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1991 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Mar 12, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/061
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A liquid crystal device comprises a pair of opposing substrates and a liquid crystal rendering a chiral smectic phase, disposed between said pair of substrates, wherein at least one of the substrates is provided with an alignment film comprising a polymer containing a skeleton selected from the group consisting of acetylene, phenylene, phenylenevinylene, phenylenexylidene, benzyl, phenylene sulfide, dimethylparaphenylene sulfide, thienylene, furan, selenophene, vinylpyridine, vinylnaphthalene, vinylferrocene, vinylcarbazole, phenylene oxide, phenylene selenide, heptadiyne, benzothiophene, thiophene, pyrrole, aniline and naphthylene. The liquid crystal device is used for a display system and effects a high contrast display without after-image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.