Title:
PHASE DIFFERENCE ELEMENTAL FILM, PHASE DIFFERENCE PLATE AND LIQUID CRYSTAL DISPLAY
Document Type and Number:
WIPO Patent Application WO/1992/022835
Kind Code:
A1
Abstract:
A drawn film is obtained by drawing at least monoaxially a polymer film which has a refraction factor nD higher than 1.60 an Abbe number nuD larger than 30.0 and a glass transition point Tg ranging from 60 to 160 �C. The retardation value R of the drawn film is 6-1000 nm and the dispersion value nuRF is 1.10 or more. A phase difference elemental film composed of such a drawn film, or a phase difference plate which is composed of the drawn film and an optically isotropic film laminated at least on one side of the drawn film is used as the hue compensation of a liquid crystal display panel. Thereby, a liquid crystal display panel having no problem of coloring and the contrast ratio which have remained unsolved can be made.
Inventors:
WADA HIROSHI (JP)
WADA SHINJI (JP)
OKUMURA OSAMU (JP)
ICHIKAWA RINJIRO (JP)
HASHIMOTO KENJI (JP)
YAMADA TAKASHI (JP)
WADA SHINJI (JP)
OKUMURA OSAMU (JP)
ICHIKAWA RINJIRO (JP)
HASHIMOTO KENJI (JP)
YAMADA TAKASHI (JP)
Application Number:
PCT/JP1992/000761
Publication Date:
December 23, 1992
Filing Date:
June 15, 1992
Export Citation:
Assignee:
SEIKO EPSON CORP (JP)
FUJIMORI KOGYO CO (JP)
FUJIMORI KOGYO CO (JP)
International Classes:
G02F1/13363; (IPC1-7): G02B5/30; G02F1/1335
Foreign References:
| JPH0333719A | 1991-02-14 | |||
| JPH0242406A | 1990-02-13 | |||
| JPH01118805A | 1989-05-11 |
Other References:
See also references of EP 0544013A4
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