Method of making an element of liquid crystal polymer using alignment induced by unpolarized or circularly polarized radiation

US6646703B1 · kind B1 · utility

Assignee

• ROLIC AG · CH

Inventors

• Hubert Seiberle · Lörrach, DE
• Martin Schadt · Seltisberg, CH

Key dates

• Filing date: Aug 2, 2001
• Grant date: Nov 11, 2003
• Expiry date: Aug 2, 2021

Classification

• Technology area (CPC G): Physics
• CPC primary: G02F1/133765
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A method of imparting a property to a material, the property being that cross-linkable monomeric or pre-polymeric liquid crystal molecules which may be placed on the layer would adopt preferred alignment. The method comprises exposing the material to unpolarised or circularly polarised radiation from an oblique direction, wherein the material is, for example, cross-linked by the irradiation, allowing monomeric or pre-polymeric liquid crystal molecules applied to or mixed with the exposed material to adopt the preferred alignment and while aligned cross-linking them. The invention also relates to LCD elements incorporating a preferred alignment.