Compounds for the homeotropic alignment of liquid-crystalline media

US11274254B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Melanie Klasen-Memmer · Heuchelheim, DE
• Edward Plummer · Frankfurt am Main, DE
• Rocco Fortte · Frankfurt am Main, DE
• Helmut Haensel · Heilbad Heiligenstadt, DE
• Timo Uebel · Darmstadt, DE
• Tamara Lehmann · Otzberg, DE

Key dates

• Filing date: Feb 5, 2019
• Grant date: Mar 15, 2022
• Expiry date: Apr 16, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/548
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Liquid-crystalline media (LC media) comprising self-aligning mesogens (self-alignment additives) which effect homeotropic (vertical) alignment of the LC media at a surface or the cell walls of a liquid-crystal display (LC display). The self-alignment additives contain five-ring systems. LC displays having homeotropic alignment of the liquid-crystalline medium (LC medium) without conventional alignment layers are provided.