Retardation film, circularly-polarizing plate, and image-displaying device

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United States of America Patent

PATENT NO 10754065
APP PUB NO 20170031061A1
SERIAL NO

15294055

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Abstract

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An object of the present invention is to provide a retardation film excellent in various properties such as optical properties, heat resistance, mechanical properties, and reliability. The present invention relates to a retardation film containing a thermoplastic resin and composed of a single layer, in which the retardation film has a value of wavelength dispersion that is a ratio of retardations at a wavelength of 450 nm and at a wavelength of 550 nm being 0.75 or more and 0.92 or less; a birefringence at a wavelength of 550 nm and the wavelength dispersion satisfy a relationship of Δn≥0.0140×(R450/R550)−0.0082; and a photoelastic coefficient is 25×10−12 Pa−1 or less.

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Patent Owner(s)

Patent OwnerAddress
MITSUBISHI CHEMICAL CORPORATION1-1 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 100-8251

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hayashi, Hiroyuki Kanagawa, JP 232 2117
Hirami, Yuuichi Fukuoka, JP 9 25
Murakami, Nao Osaka, JP 91 859
Namiki, Shingo Fukuoka, JP 22 99
Shimizu, Takashi Osaka, JP 399 2921
Sumimura, Hiroshi Osaka, JP 6 29
Uehara, Hisatoshi Kanagawa, JP 14 30

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