Liquid-crystal medium, and electro-optical display containing the medium

US6638581B2 · kind B2 · utility

Assignee

• Merck Patentgesellschaft · DE

Inventors

• Michael Heckmeier · Bensheim, DE
• Dagmar Klement · Groß-Zimmern, DE
• Matthias Bremer · Darmstadt, DE

Key dates

• Filing date: Mar 26, 2001
• Grant date: Oct 28, 2003
• Expiry date: May 6, 2021

Classification

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

Abstract

A liquid-crystal medium comprising a) at least one compound of the formula I and b) at least one compound of the formula II wherein R11, R12, R21, R22, A1, A21, Z21, Z22, L21, L22 and I are as defined herein are suitable for use in ECB, VAN, IPS, GH and ASM-PA LCD displays.