Title:
PHASE DIFFERENCE FILM, LIQUID CRYSTAL COMPOSITION, OPTICAL MEMBER, DISPLAY PANEL, DISPLAY DEVICE, AND METHOD FOR MANUFACTURING PHASE DIFFERENCE FILM
Document Type and Number:
WIPO Patent Application WO/2018/221470
Kind Code:
A1
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.
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Inventors:
AMEMIYA HIROYUKI (JP)
OKUYAMA KEN-ICHI (JP)
TAKACHI KIYOHIRO (JP)
OKUYAMA KEN-ICHI (JP)
TAKACHI KIYOHIRO (JP)
Application Number:
PCT/JP2018/020412
Publication Date:
December 06, 2018
Filing Date:
May 28, 2018
Export Citation:
Assignee:
DAINIPPON PRINTING CO LTD (JP)
International Classes:
G02B5/30; C08F220/10; C08F290/06; G02F1/13363
Foreign References:
| JP2016081035A | 2016-05-16 | |||
| JP2003149441A | 2003-05-21 | |||
| JP2002333524A | 2002-11-22 | |||
| JP2016105127A | 2016-06-09 |
Attorney, Agent or Firm:
HIRASAWA, Kenichi et al. (JP)
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