Polymerised liquid crystal film with retardation or orientation pattern
First Claim
1. A film comprising a polymerised nematic or smectic liquid crystal material, said polymerised liquid crystal material comprising at least one photoisomerisable compound, and wherein said film comprises at least two regions with different retardation of liquid crystal material, and/or at least two regions with different orientation of the liquid crystal material.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention relates to a polymerised liquid crystal (LC) film comprising at least one photoisomerisable compound and having a pattern of regions with different retardation and/or different orientation of the LC material, to methods of preparing such a film, and to its use as alignment layer, optical retardation film or optical waveguide in liquid crystal displays or other optical or electrooptical components or devices, or for decorative or security applications.
-
Citations
38 Claims
- 1. A film comprising a polymerised nematic or smectic liquid crystal material, said polymerised liquid crystal material comprising at least one photoisomerisable compound, and wherein said film comprises at least two regions with different retardation of liquid crystal material, and/or at least two regions with different orientation of the liquid crystal material.
-
12. A patterned film comprising polymerised nematic or smectic liquid crystal material, wherein said film comprises at least two regions with different retardation and at least two regions with different orientation of the liquid crystal material.
-
15. A method of preparing a multilayer structure comprising at least two layers of polymerised nematic or smectic liquid crystal material having different orientation, comprising:
-
A) providing a first layer of a polymerisable liquid crystal material comprising at least one photoisomerisable compound onto a substrate, B) aligning the first layer of liquid crystal material into planar orientation and polymerising the material, thereby fixing the orientation, C) providing a second layer of liquid crystal material as described in A) and B), wherein the first layer serves as substrate, wherein the liquid crystal material in at least one of said first and second layers, or in selected regions thereof, before polymerisation, is exposed to photoradiation to cause isomerisation of the isomerisable compound. - View Dependent Claims (17, 19, 20)
-
-
21. In an active matrix color liquid crystal display containing an optical retardation film, the improvement wherein said film comprises a patterned film having at least two regions having different retardation.
Specification