Title:
POLARIZING PLATE AND ORGANIC EL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/234789
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a polarizing plate whereby, when the polarizing plate is applied to an organic EL display device and black display is performed, reflectance during view from an oblique direction is reduced, and coloration of black is suppressed. The present invention also addresses the problem of providing an organic EL display device. This polarizing plate includes a light absorption anisotropic layer having at least one type of pigment compound, and a λ/4 retardation film, the angle formed by the transmittance center axis of the light absorption anisotropic layer and a line normal to the layer plane of the light absorption anisotropic layer being 0-45°, the retardation Rth in the thickness direction of the light absorption anisotropic layer being -20 to -160 nm for each of wavelengths of 450 nm, 550 nm, and 630 nm, and A(λ) of the light absorption anisotropic layer indicated by formula (1) being 20 to 200 nm for each of wavelengths of 450 nm, 550 nm, and 630 nm. Formula (1): A(λ) = [kz(λ) – (kx(λ) + ky(λ))/2] × d
More Like This:
Inventors:
WATANABE SHINYA (JP)
Application Number:
PCT/JP2022/018910
Publication Date:
November 10, 2022
Filing Date:
April 26, 2022
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B5/30; G09F9/00; G09F9/30; H01L27/32; H01L51/50; H05B33/02
Domestic Patent References:
| WO2019235355A1 | 2019-12-12 | |||
| WO2020095831A1 | 2020-05-14 | |||
| WO2020175569A1 | 2020-09-03 |
Foreign References:
| JP2018022153A | 2018-02-08 |
Attorney, Agent or Firm:
ITOH Hideaki et al. (JP)
Download PDF: