Phase difference film, phase difference film composite and liquid crystal display device using the same
US6638582B1 · kind B1 · utility
162Cited by
0References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2001 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Feb 8, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2413/02
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A retardation film that can compensate for the optical properties of the liquid crystal cells of a liquid crystal display device and thereby enhance image quality. The retardation film consists of a single polymer film, which has a wavelength range in which the retardation value is positive and a wavelength range in which it is negative in a wavelength range of 400-800 nm, and which satisfies the following inequality (1) and/or (2) and has a water absorption of no greater than 1% by mass.|R(400)|≧10 nm  (1)|R(700)|≧10 nm  (2)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.