Supertwist liquid-crystal display

US5374374A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Georg Weber · Langen (Hessen), DE
• Herbert Plach · Darmstadt, DE
• Volker Reiffenrath · Roßdorf, DE
• Hiroki Yoshitake · Atsugi, JP
• Hiroshi Numata · Yokohama, JP

Key dates

• Filing date: Oct 11, 1991
• Grant date: Dec 20, 1994
• Expiry date: Oct 11, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/3063
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Supertwist liquid-crystal displays having excellent properties are obtained using a nematic liquid-crystal mixture based on component A which contains PA0 one or more compounds of the formula IIa or IIb: ##STR1## one or more compounds of the formulae IIc to IIe: ##STR2## and one or more compounds of the formulae IIf to ##STR3## in which R, L.sup.1 and L.sup.2 and X are as defined herein.