Compounds for ferroelectric liquid crystal devices
US4824217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 19, 1986 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Aug 19, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/3095
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
##STR1## Ferroelectric smectic liquid crystal mixtures are provided consisting of two constituents; a smectic host and another containing a chiral compound in which rotation of the chiral center relative to the molecular core is sterically hindered, so that the chiral compound induces a high Ps in the mixture. A preferred class of chiral compounds is those derived from naturally occurring compounds with chiral groups, especially .alpha.-hydroxycarboxylic acids, amino acids and terpenoids, e.g. with chiral groups (I), (II), (III). The chiral group is incorporated into a compound containing a mesogenic combination of groups, e.g. with chains of cyclic groups and some mesogenic combinations are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.