Electro-optical liquid crystal display

US5993691A · kind A · utility

Assignee

• Merck Patentgesellschaft · DE

Inventors

• Axel Pausch · Seeheim-Jugenheim, DE
• Eike Poetsch · Mühltal, DE
• Kazuaki Tarumi · Seeheim-Jugenheim, DE
• Anja Huth · Grafing, DE
• Andreas Wachtler · Griesheim, DE
• Andreas Beyer · Hanau, DE
• Brigitte Schuler · Großostheim, DE
• Volker Reiffenrath · Roßdorf, DE
• Matthias Bremer · Darmstadt, DE
• Michael Kompter · Riedstadt, DE

Key dates

• Filing date: Aug 4, 1997
• Grant date: Nov 30, 1999
• Expiry date: Aug 4, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/0414
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to an electro-optical liquid-crystal display having a realignment layer for realigning the liquid crystals whose field has a significant component parallel to the liquid-crystal layer and which contains a liquid-crystalline medium of positive dielectric anisotropy, where the medium comprises at least one mesogenic compound containing a 3,4,5-trifluorophenyl group and/or comprises at least one mesogenic compound [lacuna] a structural unit of the formula 2 ##STR1## in which A is O or CH, PA1 z is --COO-- or a single bond PA1 L.sup.1 is F or, if A is O, is alternatively H, and PA1 L.sup.2 is H or F.