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1. (WO2018221470) PHASE DIFFERENCE FILM, LIQUID CRYSTAL COMPOSITION, OPTICAL MEMBER, DISPLAY PANEL, DISPLAY DEVICE, AND METHOD FOR MANUFACTURING PHASE DIFFERENCE FILM

Pub. No.:    WO/2018/221470    International Application No.:    PCT/JP2018/020412
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Tue May 29 01:59:59 CEST 2018
IPC: G02B 5/30
C08F 220/10
C08F 290/06
G02F 1/13363
Applicants: DAI NIPPON PRINTING CO., LTD.
大日本印刷株式会社
Inventors: AMEMIYA, Hiroyuki
雨宮 裕之
OKUYAMA, Ken-ichi
奥山 健一
TAKACHI, Kiyohiro
高地 清弘
Title: PHASE DIFFERENCE FILM, LIQUID CRYSTAL COMPOSITION, OPTICAL MEMBER, DISPLAY PANEL, DISPLAY DEVICE, AND METHOD FOR MANUFACTURING PHASE DIFFERENCE FILM
Abstract:
Provided is a positive C-type phase difference film whereby variation in color can be kept low even in the case of viewing from an oblique direction with respect to the front surface thereof. In the present invention, a phase difference layer contains a vertical aligning agent and a homeotropically aligned polymerizable liquid crystal material having reverse wavelength dispersion characteristics, and R450/R550 is less than 1.00, where R450 is the retardation of the phase difference layer at a wavelength of 450 nm and R550 is the retardation at a wavelength of 550 nm at an incidence angle inclined with respect to the direction of a line normal to the phase difference layer.