Smectic liquid-crystal medium

US5198149A · kind A · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Volker Reiffenrath · Roßdorf, DE
• Joachim Krause · Dieburg, DE
• Andreas Wachtler · Griesheim, DE
• Thomas Geelhaar · Mainz, DE
• David Coates · Bishop's Stortford, GB
• Ian C. Sage · Broadstone, GB
• Simon Greenfield · Poole, GB

Key dates

• Filing date: May 15, 1989
• Grant date: Mar 30, 1993
• Expiry date: May 15, 2009

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/46
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Chiral, tilted, smectic liquid-crystal phases containing at least two liquid-crystal components and at least one chiral doping agent, at least one liquid-crystal component being a compound having the structural unit 2,3-difluoro-1,4-phenylene, are distinguished by a very low viscosity and advantageous switching times.