Title:
偏光フィルム、円偏光板及び有機エレクトロルミネッセンス表示装置
Document Type and Number:
Japanese Patent JP7434831
Kind Code:
B2
Abstract:
To provide a UV cut polarizing film which can effectively shield light in the visible short-wavelength range and can suppress coloring.SOLUTION: A UV cut polarizing film has a cholesteric resin layer, a first optical anisotropic layer and a linear polarizer in this order. The cholesteric resin layer has a selective reflection range showing spectral transmittance of 65% or less with respect to non-polarized light. The selective reflection range includes a long wavelength side wavelength λ1 showing spectral transmittance of 65%, a short wavelength side wavelength λ2 showing spectral transmittance of 65%, a long wavelength side wavelength λ3 showing spectral transmittance of 55% and an intermediate wavelength λc between the wavelengths λ1 and λ2. The wavelength λ1, the wavelength λ3 and the wavelength λc satisfy a predetermined relation. In-plane retardation at a measurement wavelength of 590 nm of the first optical isotropic layer is "λc/4-20nm" or more and "λc/4+20nm" or less.SELECTED DRAWING: Figure 1
Inventors:
Masakazu Saito
Application Number:
JP2019211936A
Publication Date:
February 21, 2024
Filing Date:
November 25, 2019
Export Citation:
Assignee:
Nippon Zeon Co., Ltd.
International Classes:
G02B5/30; B32B7/023; B32B27/00; G02B5/26; G09F9/00; H10K50/86; H10K59/10
Domestic Patent References:
| JP2004262884A | ||||
| JP2009086379A | ||||
| JP2009086378A |
Foreign References:
| US20070076150 | ||||
| WO2019093446A1 |
Attorney, Agent or Firm:
Sakai International Patent Office