Retardation film web, circularly polarizing plate and organic EL panel

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9417369
APP PUB NO 20150109667A1
SERIAL NO

14389576

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Abstract

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The present invention provides a retardation film web having sufficient reversed wavelength dispersion characteristics and favorable for film lamination according to a roll-to-roll system. A retardation film web of the present invention includes a polycarbonate resin or a polyester carbonate resin, an orientation angle θ which is an angle between a slow axis and a width direction satisfies the following formula (I), and a ratio of an in-plane retardation R450 measured at a wavelength of 450 nm to an in-plane retardation R550 measured at a wavelength of 550 nm satisfies the following formula (II):

description='In-line Formulae' end='lead'38°≦θ≦52°  (I)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'R450/R550<1  (II).description='In-line Formulae' end='tail'

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Patent Owner(s)

  • MITSUBISHI CHEMICAL CORPORATION;NITTO DENKO CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kojima, Tadashi Osaka, JP 145 2000
Murakami, Nao Osaka, JP 91 858
Namiki, Shingo Fukuoka, JP 22 99
Shimizu, Takashi Osaka, JP 399 2918
Tanaka, Tomohiko Fukuoka, JP 56 461
Uwada, Kazuki Osaka, JP 26 123

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