Title:
OPTICAL ANISOTROPIC FILM, CIRCULARLY POLARIZING PLATE, AND DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/200989
Kind Code:
A1
Abstract:
The present invention provides an optical anisotropic film, a circularly polarizing plate, and a display device showing reverse wavelength dispersibility and an Nz factor of about 0.50 (0.40 to 0.60). The optical anisotropic film of the present invention is formed by using a lyotropic liquid crystal composition containing a non-colorable rod-shaped compound and a non-colorable plate-shaped compound. When the measurement to obtain an ultraviolet-visible absorption spectrum by emitting linearly polarized light from the normal direction of the optical anisotropic film is performed by changing the direction of the linearly polarized light, in a case where a direction in which the absorbance at the maximum absorption wavelength in the wavelength range of 230 to 400 nm of the rod-shaped compound is highest is defined as a first direction, and a direction in which the absorbance at the maximum absorption wavelength in the wavelength range of 230 to 400 nm of the plate-shaped compound is the highest is defined as a second direction, the first direction and the second direction are orthogonal to each other, the maximum absorption wavelength of the rod-shaped compound in the wavelength range of 230 to 400 nm is smaller than the maximum absorption wavelength of the plate-shaped compound in the wavelength range of 230 to 400 nm, and NzP represented by Expression (N) of the plate-shaped compound is negative. Expression (N) NzP = (nxP-nzP)/(nxP-nyP)
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Inventors:
MORISHIMA SHINICHI (JP)
HIRAI YUKI (JP)
HIMENO RYOJI (JP)
HIRAI YUKI (JP)
HIMENO RYOJI (JP)
Application Number:
PCT/JP2021/013607
Publication Date:
October 07, 2021
Filing Date:
March 30, 2021
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/30; C08K5/00; C08L101/12; G09F9/00; H01L27/32; H01L51/50; H05B33/02
Foreign References:
| JP2012500316A | 2012-01-05 | |||
| JP2015200754A | 2015-11-12 | |||
| JP2012507619A | 2012-03-29 | |||
| JP2013543148A | 2013-11-28 | |||
| US20020168511A1 | 2002-11-14 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
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