Patent · US Expired

Ferroelectric liquid crystal mixture

US6171519A · kind A · utility

4Cited by

12References

12Claims

0Family size

Assignee

Hoechst Research & Technology Deutschland GmbH & Co. KG · DE

Inventors

Toshiaki Nonaka · Kakegawa, JP
Ayako Takeichi · Tokorozawa, JP
Li Ji · Higashikurume, JP
Kazuya Nagao · Saitama, JP
Rainer Wingen · Hattersheim, DE
Javier Manero · Frankfurt, DE
Barbara Hornung · Hasselroth, DE
Wolfgang Schmidt · Frankfurt, DE

Key dates

Filing date	Jun 29, 1998
Grant date	Jan 9, 2001
Priority date	—
Expiry date	Jun 29, 2018

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K19/42
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

A ferroelectric liquid crystal mixture having a negative value of .DELTA.e and allowing a high speed response and a low voltage driving, as well as a liquid crystal display devise using the crystal mixture of the invention. The ferroelectric liquid crystal mixture according to the invention comprises two or more compounds from at least two different of the following classes of compounds: A. thiadiazoles, B. phenanthrenes, C. 2-fluoropyridines, D. difluorobenzenes, E. meta-substituted aromatic compounds.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.