Tristable liquid crystal display device
US6084649A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1998 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Aug 10, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K19/3469
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A tristable liquid crystal display device comprises (a) first and second opposed substrates, at least one bearing an alignment coating and each bearing at least one electrode so as to define one or a plurality of pixels; (b) a tilted smectic or induced tilted smectic liquid crystal composition disposed between the substrates; and (c) a pair of orthogonally disposed polarizers, each having a polarization axis, one polarization axis being aligned with the zero field optical axis of a tilted smectic or induced tilted smectic mesophase of the liquid crystal composition; wherein the substrates are disposed so as to provide an alignment of the liquid crystal composition, which comprises (i) at least one chiral liquid crystal compound; and (ii) at least one achiral liquid crystal compound that can be represented by the following formula: EQU R--M--N--(P).sub.a --OCH.sub.2 R.sub.f (I) where R, M, N, P, a and R.sub.f are describe herein; wherein the liquid crystal composition exhibits tristable switching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.