Title:
積層フィルム及びそれを用いた偏光板
Document Type and Number:
Japanese Patent JP7206780
Kind Code:
B2
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 [mu]m. (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 surfaceof 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.)
More Like This:
Inventors:
Toshiki Inoue
Abe Takanaga
Hiroshi Shibano
Abe Takanaga
Hiroshi Shibano
Application Number:
JP2018194624A
Publication Date:
January 18, 2023
Filing Date:
October 15, 2018
Export Citation:
Assignee:
Toyobo Co., Ltd.
International Classes:
G02B5/30; B32B3/30; B32B7/023; G02F1/1335; G09F9/00; H05B33/02; H10K50/00; H10K59/00
Domestic Patent References:
| JP2009150998A | ||||
| JP2017068223A | ||||
| JP2012118201A | ||||
| JP2007233129A | ||||
| JP2014016476A | ||||
| JP2015132691A |
Attorney, Agent or Firm:
Saegusa International Patent Office