Liquid crystal element having composite layer
US6015507A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1995 |
| Grant date | Jan 18, 2000 |
| Priority date | — |
| Expiry date | Nov 8, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/544
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A liquid crystal element includes a pair of plates at least one of which is transparent, and a composite layer retained between the plates and including a liquid crystal material in a transparent resin substrate. In the liquid crystal element, (A) the liquid crystal material in the composite layer contains aromatic rings and exhibits a cholesteric phase, the substrate in the composite layer is made of resin and contains aromatic rings, and a ratio of the number of aromatic rings to that of carbon atoms in the main chain of monomer is in a range from 1:5 to 1:12; (B) the liquid crystal material in the composite layer is formed of a mixture of a liquid crystal material exhibiting a nematic phase and a liquid crystal material exhibiting a smectic phase, and exhibits a cholesteric phase as a whole; or (C) the liquid crystal material in the composite layer is formed of a mixture of a tolane liquid crystal material, a biphenyl liquid crystal material and a chiral ingredient, and exhibits a cholesteric phase as a whole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.