Liquid crystal compounds exhibiting negative anisotropy of permittivity, liquid crystal compositions, and liquid crystal displays
US6210761A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1999 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | May 28, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention is to provide liquid crystalline compounds which exhibit a negative dielectric anisotropy value, have an extremely high voltage holding ratio and a low threshold voltage, are remarkably small in their dependency on temperature, hardly exhibit smectic phase, and are excellent in miscibility with other liquid crystal materials; to provide liquid crystal compositions comprising the liquid crystalline compound; and to provide liquid crystal display devices fabricated by using the liquid crystal composition; the liquid crystalline compounds are expressed by the following general formula (1) ##STR1## wherein Ra, Rb, Y.sub.1 to Y.sub.6, Z.sub.1 and Z.sub.2 are herein defined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.