Electro-optical liquid-crystal

US6342279B1 · kind B1 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Kazuaki Tarumi · Seeheim-Jugenheim, DE
• Andreas Beyer · Hanau, DE
• Anja Huth · Grafing, DE
• Eike Poetsch · Mühltal, DE
• Michael Kompter · Riedstadt, DE

Key dates

• Filing date: Oct 10, 1996
• Grant date: Jan 29, 2002
• Expiry date: Oct 10, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2323/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to an electrooptical liquid-crystal display having a realignment layer for realigning the liquid crystals, where the field thereof has a significant component parallel to the liquid-crystal layer, containing a liquid-crystalline medium having positive dielectric anisotropy, where the medium comprises at least one mesogenic compound which contains a group of the formula I and at least one compound of formula II wherein L1 is H or F; R1 R2 are H, an alkyl or alkenyl radical having 1 to 15 carbon atoms which may be substituted; Q is a radical of the formula —(O)q (CH2)r—(CF2)s— in which q is 0 or 1; r is 0 or an integer of 1 to 6, and s is an integer of 0 to 6; X is F or Cl, and in the case where s ≠0, is alternatively H, and A1 and A2 are each, independently of one another, a 1,4-cyclohexenylene or trans-1,4-cyclohexylene which may be substituted; 1,4-phenylene in which may be substituted, 1,4-bicyclo[2.2.2]octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl and 1,2,3,4 tetrahydronaphthalene-2,6-diyl, which may be substituted; L2 and L3 are each, independently of one another, H or F; Z1 and Z2 are each, inde…