Title:
LAMINATE AND ORGANIC EL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/042818
Kind Code:
A1
Abstract:
[Problem] To provide a laminate able to inhibit a color change when white is displayed (color emitted) being strongly felt, even when exposed to the outdoors for a long time. [Solution] This laminate has, in order, a first ultraviolet absorption layer, a first light-absorption anisotropic layer, a second ultraviolet absorption layer, and a second light-absorption anisotropic layer. The first light-absorption anisotropic layer is formed from a composition containing at least one dichroic dye and a liquid crystal compound. The second light-absorption anisotropic layer has an absorption axis in a horizontal direction with respect to a plane of the layer. The first ultraviolet absorption layer and the second ultraviolet absorption layer both satisfy the relationship given in formula (1). The first light-absorption anisotropic layer satisfies the relationship given in formula (2). (1) T(380)≤20; (2) Az>(Ax+Ay)/2; [In formula (1), T(380) represents the transmittance [%] at a wavelength of 380 nm. In formula (2), Ax, Ay, and Az represent an absorbance of linearly polarized light oscillating in the x-axis direction, the y-axis direction, and the z-axis direction, respectively, said absorbance being of a maximum wavelength of absorption of the first light-absorption anisotropic layer in the range of wavelengths of 410-780 nm, inclusive. The x axis is a direction that is parallel to the absorption axis direction of the second light-absorption anisotropic layer in a plane of the first light-absorption anisotropic layer. The y axis is a direction that is orthogonal to the x axis in the plane of the first light-absorption anisotropic layer. The z axis is a direction that is orthogonal to the x axis and the y axis.]
Inventors:
NADA TAKAYUKI (JP)
HATANAKA NOBUYUKI (JP)
MORIMOTO KENSUKE (JP)
HATANAKA NOBUYUKI (JP)
MORIMOTO KENSUKE (JP)
Application Number:
PCT/JP2023/021502
Publication Date:
February 29, 2024
Filing Date:
June 09, 2023
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
G02B5/30; B32B7/023; G09F9/00; G09F9/30; H05B33/02; H10K50/10; H10K59/00
Foreign References:
| JP2018533031A | 2018-11-08 | |||
| JP2017508169A | 2017-03-23 | |||
| JP2020122854A | 2020-08-13 | |||
| KR20200050753A | 2020-05-12 |
Attorney, Agent or Firm:
NAKAYAMA, Tohru et al. (JP)
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