Optical film

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United States of America Patent

PATENT NO 9696475
APP PUB NO 20150049291A1
SERIAL NO

14454367

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Abstract

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To provide an optical film excellent in suppression of light leakage in black display. An optical film having a first phase difference layer and a second phase difference layer, wherein the second phase difference layer has an optical property represented by the formula (3), the second phase difference layer has a thickness of 0.2 μm to 2.0 μm, and further, the optical film has optical properties represented by the formulae (1) and (2):

description='In-line Formulae' end='lead'Re(450)/Re(550)≦1.00  (1)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'1.00≦Re(650)/Re(550)  (2)description='In-line Formulae' end='tail'

description='In-line Formulae' end='lead'nx≈nydescription='In-line Formulae' end='tail'

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Patent Owner(s)

  • SUMITOMO CHEMICAL COMPANY, LIMITED

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hatanaka, Nobuyuki Osaka, JP 31 151
Kobayashi, Tadahiro Osaka, JP 31 175
Komatsu, Yoshifumi Niihama, JP 27 82
Sase, Mitsutaka Niihama, JP 8 87
Yokota, Akira Osaka, JP 65 1218

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