Liquid crystal composition
US4559161A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1983 |
| Grant date | Dec 17, 1985 |
| Priority date | — |
| Expiry date | Feb 16, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/46
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An improved liquid crystal composition for use in a liquid crystal light valve is provided. The light valve includes a liquid crystal panel having two opposed transparent substrates with transparent electrodes disposed on the inner surfaces thereof with the liquid crystal material disposed between the substrates. The liquid crystal panel controls light transmittance in response to signals of higher frequency h.sub.f and lower frequency h.sub.l than a crossing frequency f.sub.c (wherein the dielectric anisotropy is zero) applied to the liquid crystal material, respectively or simultaneously. The improved liquid crystal composition includes the following compounds in the weight percent concentrations as indicated: ______________________________________ weight per- centage compound (wt %) ______________________________________ (1) ##STR1## 40-60 (2) ##STR2## 0-20 (3) ##STR3## 0-20 (4) ##STR4## 5-20 (5) ##STR5## 5-15 (6) chiral nematic liquid crystal 0.05-5 ______________________________________ wherein, ##STR6## R" is R' or --OCR' and when ##STR7## R" is --OCR', and each R and R' is a straight chain alkyl group having from one to eight carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.