Supertwist liquid crystal display

US5876626A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Georg Weber · Langen (Hessen), DE
• Herbert Plach · Darmstadt, DE
• Takamasa Oyama · Akashi, JP
• Hiroki Yoshitake · Atsugi, JP
• Bernhard Scheuble · Alsbach, DE
• Reinhard Hittich · Seeheim-Jugenheim, DE
• Hans-Adolf Kurmeier · Seeheim-Jugenheim, DE
• Eike Poetsch · Mühltal, DE
• Klaus P. Stahl · Darmstadt, DE

Key dates

• Filing date: Dec 7, 1994
• Grant date: Mar 2, 1999
• Expiry date: Dec 7, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/42
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Supertwist liquid crystal displays having very short switching times are obtained if the nematic liquid crystal mixture contains at least one component chosen from group A consisting of compounds of the formulae AI to AVI: ##STR1## wherein R.sup.1 and R.sup.2 in each case independently of one another are each R and R is alkyl having 1-12 C atoms, wherein one or two non-adjacent CH.sub.2 groups can also be replaced by --O--, --CH.dbd.CH--, --CO--, --O--CO-- or --CO--O--, and up to four other components.