Liquid crystalline media having homeotropic alignment

US10294426B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Graziano Archetti · Darmstadt, DE
• Izumi Saito · Darmstadt, DE
• Rocco Fortte · Frankfurt am Main, DE
• Oliver Heppert · Weiterstadt, DE
• Andreas Taugerbeck · Darmstadt, DE
• Elena Neumann · Herbstein, DE

Key dates

• Filing date: Jun 25, 2015
• Grant date: May 21, 2019
• Expiry date: Jul 10, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/13712
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to liquid-crystalline media (LC media) having negative or positive dielectric anisotropy, comprising a low-molecular-weight component and a polymerizable component. The polymerizable component comprises self-aligning, polymerizable mesogens (polymerizable 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 invention therefore also encompasses LC displays having homeotropic alignment of the LC medium without alignment layers. The invention discloses novel structures for polymerizable self-alignment additives which have a certain position of the functional groups.