PHASENDIFFERENZ-FILM, PHASENDIFFERENZ-PLATTE UND FLÜSSIGKRISTALLANZEIGE

• Main Authors: ICHIKAWA, RINJIRO, FUJIMORI KOGYO CO., LTD., TOKYO 103, JP, YAMADA, TAKASHI, FUJIMORI KOGYO CO., LTD., TOKYO 103, JP, HASHIMOTO, KENJI, FUJIMORI KOGYO CO., LTD., TOKYO 103, JP, WADA, SHINJI, SEIKO EPSON CORPORATION, NAGANO-KEN 392, JP, OKUMURA, OSAMU, SEIKO EPSON CORPORATION, NAGANO-KEN 392, JP, WADA, HIROSHI, SEIKO EPSON CORPORATION, NAGANO-KEN 392, JP
• Format: Patent
• Language: German
• Published: 05.09.1996
• Edition: 6
• Subjects: DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

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 nu D larger than 30.0 and a glass transition point Tg ranging from 60 to 160 DEG C. The retardation value R of the drawn film is 6-1000 nm and the dispersion value nu RF 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.