Electro-optical display with in-situ polymerized columns providing alignment and structural bond between substrate
US7075613B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2002 |
| Grant date | Jul 11, 2006 |
| Priority date | — |
| Expiry date | Jul 17, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133703
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid crystal display device comprises two substrates facing and spaced from each other, at least one of the substrates being transparent; an electro-optical material filling a first portion of the space between the substrates, the electro-optical material comprising molecules whose spatial orientation can be altered by application of an electric field across the two substrates; and a polymeric material filling a second portion of the space between the substrates, the polymeric material having been polymerized in situ between the plates, wherein the polymeric material forms a multiplicity of microscopic polymer columns extending between the two substrates, and the columns provide both a structural bond between the two substrates for maintaining the spacing between the substrates and alignment of the molecules of the electro-optical material, with the alignment resulting from the close spacing of the microscopic columns. A method to fabricate electro-optical displays having two facing substrates, electro-optical material in the space between the substrates, and in-situ polymerized microscopic columns extending between the substrates is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.