Title:
OPTICAL FILM, OPTICAL MEMBER, BACKLIGHT DEVICE, AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/045660
Kind Code:
A1
Abstract:
The present invention provides: an optical film which has large phase difference values in the thickness direction, in which the average angle of inclination, with respect to a support body surface, of a circular plate of discotic liquid crystal compounds is horizontal, and which has few orientation defects and large refractive index anisotropy in the thickness direction; an optical member; a backlight device; and a display device. This optical film includes a support body and an optically anisotropic layer formed from a polymerizable liquid crystal composition that contains discotic liquid crystal compounds; the polymerizable liquid crystal composition includes discotic liquid crystal compounds of two types and a polymer that includes prescribed constituent units in prescribed quantity ratios; the in-plane phase difference Re(550) of the optically anisotropic layer at a wavelength of 550 nm is 0–10 nm; the phase difference Rth(550) in the thickness direction of the optically anisotropic layer at a wavelength of 550 nm is 200–700 nm; and the optically anisotropic layer is formed by the hardening of the discotic liquid crystal compounds in a horizontal orientation.
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Inventors:
YOSHINARI SHINICHI (JP)
FUJIWARA ISAO (JP)
KASHIWAGI DAISUKE (JP)
ICHIHARA NOBUHIKO (JP)
FUJIWARA ISAO (JP)
KASHIWAGI DAISUKE (JP)
ICHIHARA NOBUHIKO (JP)
Application Number:
PCT/JP2019/034249
Publication Date:
March 05, 2020
Filing Date:
August 30, 2019
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/30; B32B7/023; B32B23/08; B32B27/00; G02F1/13; G02F1/13363; G09F9/30
Foreign References:
| JP2012087197A | 2012-05-10 | |||
| JP2011209517A | 2011-10-20 | |||
| JP2008257205A | 2008-10-23 | |||
| JP2008052147A | 2008-03-06 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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