Display process using a thermo-optical effect with a memory in a thin disc-like liquid crystal layer and disc-like liquid crystals having such an effect
US4430650A · kind A · utility
21Cited by
7References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 31, 1981 |
| Grant date | Feb 7, 1984 |
| Priority date | — |
| Expiry date | Aug 31, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/328
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process wherein certain disc-like liquid crystals, which locally undergo heating and then rapid cooling on either side of the transition temperature between two mesophases permit the liquid crystal to become diffuse with an adequate contrast to be used for display purposes. The following liquid crystals can be utilized, i.e. triphenylene derivatives of formulas: ##STR1##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.