RETARDATION FILM, METHOD FOR PRODUCING THE SAME AND OPTICAL COMPENSATION POLARIZING PLATE
PROBLEM TO BE SOLVED: To provide a retardation film capable of properly adjusting even phase difference when seen from an oblique direction, having uniformity of in-plane optical characteristics, and also having such uniform optical compensation ability as to ensure no local contrast reduction even...
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| creator | SHIRAFUJI FUMIAKI KURIMOTO KENJI SHINTAKU MASAHITO |
| description | PROBLEM TO BE SOLVED: To provide a retardation film capable of properly adjusting even phase difference when seen from an oblique direction, having uniformity of in-plane optical characteristics, and also having such uniform optical compensation ability as to ensure no local contrast reduction even in a large liquid crystal display device. SOLUTION: The retardation film comprises one film produced by a solvent cast method and ensures a larger frontal phase difference Re at a longer wavelength. The angle between a slow axis direction in the film surface and a flow direction of the film is within ±1.5°. A refractive index in the flow direction of the film at a wavelength of 586.7 nm is larger than a refractive index in the width direction of the film. With respect to a refractive index nx in the slow axis direction in the film surface, a refractive index ny in a quick axis direction and a refractive index nz in the thickness direction, value calculated by (nx-nz)/(nx-ny) is 1.00 to |
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SOLUTION: The retardation film comprises one film produced by a solvent cast method and ensures a larger frontal phase difference Re at a longer wavelength. The angle between a slow axis direction in the film surface and a flow direction of the film is within ±1.5°. A refractive index in the flow direction of the film at a wavelength of 586.7 nm is larger than a refractive index in the width direction of the film. With respect to a refractive index nx in the slow axis direction in the film surface, a refractive index ny in a quick axis direction and a refractive index nz in the thickness direction, value calculated by (nx-nz)/(nx-ny) is 1.00 to <1.20. A frontal phase difference is 70-100 nm, a photoelastic coefficient is 3.0×10-11m2/N, and thickness variation in the width direction is less. 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SOLUTION: The retardation film comprises one film produced by a solvent cast method and ensures a larger frontal phase difference Re at a longer wavelength. The angle between a slow axis direction in the film surface and a flow direction of the film is within ±1.5°. A refractive index in the flow direction of the film at a wavelength of 586.7 nm is larger than a refractive index in the width direction of the film. With respect to a refractive index nx in the slow axis direction in the film surface, a refractive index ny in a quick axis direction and a refractive index nz in the thickness direction, value calculated by (nx-nz)/(nx-ny) is 1.00 to <1.20. A frontal phase difference is 70-100 nm, a photoelastic coefficient is 3.0×10-11m2/N, and thickness variation in the width direction is less. 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SOLUTION: The retardation film comprises one film produced by a solvent cast method and ensures a larger frontal phase difference Re at a longer wavelength. The angle between a slow axis direction in the film surface and a flow direction of the film is within ±1.5°. A refractive index in the flow direction of the film at a wavelength of 586.7 nm is larger than a refractive index in the width direction of the film. With respect to a refractive index nx in the slow axis direction in the film surface, a refractive index ny in a quick axis direction and a refractive index nz in the thickness direction, value calculated by (nx-nz)/(nx-ny) is 1.00 to <1.20. A frontal phase difference is 70-100 nm, a photoelastic coefficient is 3.0×10-11m2/N, and thickness variation in the width direction is less. COPYRIGHT: (C)2007,JPO&INPIT</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS METALLURGY OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP |
| title | RETARDATION FILM, METHOD FOR PRODUCING THE SAME AND OPTICAL COMPENSATION POLARIZING PLATE |
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