Electrooptical liquid crystal system
US6596193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2002 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | May 8, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/057
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
To improve switching times, especially at low temperatures, one or more reactive liquid crystalline compounds is added to a liquid crystal mixture used in an electrooptical system. The electrooptical system comprises a PDLC film comprising a liquid crystal mixture forming micro- droplets in an optically isotropic, transparent polymer matrix between 2 electrode layers. The reactive liquid crystalline compounds are of formula II, R′—G′—R″, wherein R′, G′ and R″ are as defined herein. The liquid crystal mixture comprises one or more compounds of the formula I wherein R, A1, A2, Z1, Z2, X1, X2, Q, Y and n are as defined herein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.