PHASE DIFFERENCE FILM, CIRCULARLY POLARIZING PLATE OR ELLIPTICALLY POLARIZING PLATE, DISPLAY PANEL, LIQUID CRYSTAL DISPLAY PANEL, ORGANIC EL DISPLAY PANEL, DISPLAY DEVICE, LIQUID CRYSTAL DISPLAY DEVICE, AND ORGANIC EL DISPLAY DEVICE

WIPO Patent Application WO/2018/186472

A1

The purpose of the present invention is to provide a phase difference film whereby contrast is satisfactory in a wide viewing angle range and a change in color for each viewing angle can be suppressed over a wide band. The purpose of the present invention is furthermore to provide a circularly polarizing plate or elliptically polarizing plate, a display panel, a liquid crystal display panel, an organic EL display panel, a display device, a liquid crystal display device, and an organic EL display device in which the phase difference film is used. This phase difference film has: a positive A-plate provided with positive A-type characteristics and in which ∆NA is ReA450/ReA550, where ReA450 is the front surface retardation at a wavelength of 450 nm, and ReA550 is the front surface retardation at a wavelength of 550 nm; and a positive C-plate provided with positive C-type characteristics and in which ∆NC is RthC450/RthC550, where RthC450 is the thickness-direction retardation at a wavelength of 450 nm, and RthC550 is the thickness-direction retardation at a wavelength of 550 nm; one of ∆NA and ∆NC being 1.0 or less and the other being less than 1.0, and |∆NA - ∆NC| ≤ 0.15.

EMORI SATOSHI (JP)
AMEMIYA HIROYUKI (JP)
KURODA TAKASHI (JP)

PCT/JP2018/014608

October 11, 2018

April 05, 2018

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DAINIPPON PRINTING CO LTD (JP)

G02B5/30; G02F1/1335; G02F1/13363; G09F9/30; H01L27/32; H01L51/50; H05B33/02

WO2017170455A1

2017-10-05

JP2015200861A

2015-11-12

HIRASAWA, Kenichi et al. (JP)

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