Liquid crystalline medium and liquid crystal display

US7579053B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Markus Czanta · Darmstadt, DE
• Atsutaka Manabe · Bensheim, DE
• Lars Lietzau · Darmstadt, DE
• Michael Wittek · Darmstadt, DE

Key dates

• Filing date: May 24, 2006
• Grant date: Aug 25, 2009
• Expiry date: Aug 25, 2026

Classification

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

Abstract

Dielectrically positive liquid crystalline media comprising a dielectrically neutral component, component A, comprising a dielectrically neutral compound of formula Iwherein the parameters have the meaning given in the specification, in a high concentration, and a dielectrically positive component, component B, comprising one or more dielectrically positive compounds having a dielectric anisotropy of more than 3, are described. Also described are liquid crystal displays comprising these media, especially to active matrix displays and in particular TN and to IPS displays.