TN and STN liquid-crystal display

US6028655A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Georg Weber · Langen (Hessen), DE
• Harald Hirschmann · Darmstadt, DE
• Volker Reiffenrath · Roßdorf, DE
• Ursula Patwal · Reinheim, DE
• Dagmar Zimmermann · Groß-Gerau, DE

Key dates

• Filing date: Oct 31, 1997
• Grant date: Feb 22, 2000
• Expiry date: Oct 31, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/3004
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to TN liquid-crystal displays and supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependences, and to the novel nematic liquid-crystal mixtures used therein, which are distinguished by the fact that they comprise at least one compound o the formula IA ##STR1## and at least one compound of the formula IB ##STR2## in which R.sup.a, R.sup.b, R.sup.c, Ring A*, L, l and r are as defined in claim 1.