Alignment layers containing cyclic structural elements

US5409635A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Norbert Rosch · Frankfurt am Main, DE
• Peter Wegener · Königstein, DE
• Rainer Wingen · Hattersheim, DE

Key dates

• Filing date: Sep 11, 1992
• Grant date: Apr 25, 1995
• Expiry date: Sep 11, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/141
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An alignment layer for liquid-crystal displays which contains at least one compound containing, as structural element, a mediocyclic or macrocyclic carbon ring, results, in displays, in significantly increased contrast, inter alia. The mediocyclic or macrocyclic structural elements may also contain heteroatoms, such as, for example, O, N and S atoms.