Optically anisotropic material, process for producing it, and retardation plate and liquid crystal display device using same
US5688436A · kind A · utility
20Cited by
12References
26Claims
0Family size
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Key dates
| Filing date | Jun 25, 1996 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Jun 25, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/031
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
By using an optically anisotropic film having the optical axis substantially parallel to the normal line of the film and comprising a polymer of a liquid crystal oligomerhaving positive anisotropy of refractive index and showing nematic or smectic phase, or by lamining the optically anisotropic film and a transparent or semitransparent polymer film, or by combining the optically anisotropic film with a uniaxially oriented retardation film, it is possible to obtain a composite retardation plate with a large viewing angle, and this retardation plate can be applied to a liquid crystal display device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.