Liquid crystal display element
US4381886A · kind A · utility
20Cited by
1References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1981 |
| Grant date | May 3, 1983 |
| Priority date | — |
| Expiry date | Feb 13, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/027
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display element which may have a multi-layer structure comprising substrates having electrodes and liquid crystal orientation controlling films on the sides thereof facing a liquid crystal layer and one or more liquid crystal layers interposed between said substrates, characterized in that the liquid crystal orientation controlling film is made from a copolymer produced by reacting a dibasic acid dihydrazide, a diamine and a tetracarboxylic acid dianhydride, followed by ring closure and dehydration with heating, is excellent in transparency and the electrode (partially reflected) pattern is hardly observable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.