Polymer dispersed liquid crystal electro-optical device and method for manufacturing the same
US6046791A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1997 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Jul 9, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A polymer dispersed liquid crystal electro-optical device comprising a liquid crystal polymer complex layer having a liquid crystal and a polymer, wherein said liquid crystal and said polymer are aligned in the same direction when no electric field is applied, and an electrode structure formed on each side of said liquid crystal polymer complex layer for applying an electric field to said liquid crystal polymer complex layer to align said liquid crystal along the electric field so as to render said liquid crystal polymer complex layer in a light-scattering state. The liquid crystal polymer complex layer is formed by dissolving a liquid crystal and a polymer precursor to form a solution; adding a compound in which at least one hydrogen atom in a benzene ring is substituted by a hydroxy group or a compound having a benzene ring with a hydroxy group as a basic skeleton to said solution; polymerizing said polymer precursor to from a polymer; and phase separating said liquid crystal and said polymer to form a liquid crystal polymer complex layer. The compound improves the initial refractive index, and the refractive index and contrast after energize-aging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.