Supertwist liquid-crystal display

US5714087A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Axel Pausch · Seeheim-Jugenheim, DE
• Akihiro Kojima
• Matthias Bremer · Darmstadt, DE
• Hideo Ichinose · Yokohama, JP
• Michael Junge · Munich, DE
• Hiroshi Numata · Yokohama, JP
• Volker Reiffenrath · Roßdorf, DE
• Bernhard Rieger · Langenau, DE
• Atsusi Sawada
• Kazuaki Tarumi · Seeheim-Jugenheim, DE
• Georg Weber · Langen (Hessen), DE

Key dates

• Filing date: Feb 12, 1996
• Grant date: Feb 3, 1998
• Expiry date: Feb 12, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/58
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to improved STN displays of which the nematic liquid crystalline medium comprises compounds of formulae I1, I2, II1 and/or III1 ##STR1## wherein R.sup.3 and R.sup.4 are each independently alkyl with 1 to 8 C atoms, ##STR2## wherein R.sup.1 is alkyl or alkoxy with 1 to 8 C atoms, ##STR3## wherein R2 is oxaalkyl, alkenyl with up to 8 C atoms.