Optically anisotropic film, method of manufacturing the same, and liquid crystal display apparatus
US6294231A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 17, 1999 |
| Grant date | Sep 25, 2001 |
| Priority date | — |
| Expiry date | Sep 17, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13363
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An optically anisotropic film obtained from a mixture comprising a polymer and a liquid crystal compound, wherein retardation of the optically anisotropic film at 80.degree. C., 60.degree. C. or 0.degree. C. measured from a normal direction is 20-97%, 20-99% or 101-150%, respectively, of retardation at 30.degree. C., and an absolute value of a deviation in retardation by said liquid crystal compound is not greater than 6% when the optically anisotropic film is held at 30% for 200 hours, has the temperature dependence in accordance with the temperature dependence of retardation of a liquid crystal display cell, and a small variation of retardation by the liquid crystal compound with the lapse of time, and thus is suitable for use in a liquid crystal display apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.