RETARDATION FILM, POLARIZING PLATE AND LIQUID CRYSTAL PANEL

PROBLEM TO BE SOLVED: To provide a retardation film excellent in heat resistance and durability even in the case of a thin film, and to provide a polarizing plate and a liquid crystal panel obtained using the retardation film. SOLUTION: The retardation film is a cyclic olefinic polymer film having a...

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Hauptverfasser:	TAMURA AKIRA, USHINO TAKUHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON 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 GENERAL PROCESSES OF COMPOUNDING METALLURGY NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF THEIR PREPARATION OR CHEMICAL WORKING-UP WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a retardation film excellent in heat resistance and durability even in the case of a thin film, and to provide a polarizing plate and a liquid crystal panel obtained using the retardation film. SOLUTION: The retardation film is a cyclic olefinic polymer film having a film thickness of ≤30 μm in conformity to JIS K7127 and K7161, wherein when the retardation film is subjected to a tension test in a direction orthogonal in a film surface to a maximum refractive index direction in the film surface using a dumbbell No.2 type test strip, a tensile force at a yield point is ≥8 N. COPYRIGHT: (C)2008,JPO&INPIT