Title:
LAMINATE FILM, POLARIZING PLATE IN WHICH SAME IS USED, AND IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/139095
Kind Code:
A1
Abstract:
Provided is a laminate film, etc., with which it is possible to suppress rainbow spots and to ensure high transparency and image vividness when used in an environment with light sources having steep spectral peaks and in other such cases. The laminate film has all of the following characteristics. (a) At least one surface of a base material film is an uneven surface, the arithmetic average roughness (Ra) of the uneven surface being 0.2-10 μm. (b) The refractive index anisotropy (Bfnx - Bfny) of the laminate film is 0.04-0.2. (c) An optically isotropic layer is provided on the uneven surface of the base material film, the refractive index of the optically isotropic layer being in a range from Bfny - 0.15 to Bfnx + 0.15. (Bfnx is the slow-axis-direction refractive index of the base material film, and Bfny is the fast-axis-direction refractive index thereof.)
Inventors:
INOUE TOSHIKI (JP)
ABE TAKAHISA (JP)
SHIBANO HIROSHI (JP)
ABE TAKAHISA (JP)
SHIBANO HIROSHI (JP)
Application Number:
PCT/JP2019/000571
Publication Date:
July 18, 2019
Filing Date:
January 10, 2019
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B32B7/023; G02B5/30
Foreign References:
| JP2009150998A | 2009-07-09 | |||
| JP2017068223A | 2017-04-06 | |||
| JP2012118201A | 2012-06-21 | |||
| JP2007233129A | 2007-09-13 | |||
| JP2014016476A | 2014-01-30 | |||
| JP2015132691A | 2015-07-23 |
Attorney, Agent or Firm:
SAEGUSA & PARTNERS (JP)
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