Laminate and light diffusion control film
AssigneeLintec Corporation
InventorsHiroki Fukushima, Tatsuki Kuramoto, Baku Katagiri, Kentaro Kusama
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Abstract
A laminate used under an environment irradiated with external light includes a light diffusion control film having an internal structure in the film. The internal structure includes a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index. The laminate further includes an ultraviolet absorbing layer located further on the external light incident side than the light diffusion control film. The light diffusion control film contains a weakly basic hindered amine-based compound having a carbonate skeleton.
Claims11
A laminate used under an environment irradiated with external light, the laminate comprising:
- a light diffusion control film having an internal structure in the film, the internal structure comprising a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index;
- and
- an ultraviolet absorbing layer located further on an external light incident side than the light diffusion control film,
- wherein the ultraviolet absorbing layer covers an entire surface of the light diffusion control film,
- the ultraviolet absorbing layer is a pressure sensitive adhesive layer that contains an ultraviolet absorber,
- the light diffusion control film containing a weakly basic hindered amine-based compound having a carbonate skeleton, and
- the light transmittance of the ultraviolet absorbing layer at a wavelength of 380 nm is 1% or less.
A light diffusion control film used in a laminate used under an environment irradiated with external light, the laminate comprising the light diffusion control film and an ultraviolet absorbing layer located further on an external light incident side than the light diffusion control film,
- wherein the ultraviolet absorbing layer covers an entire surface of the light diffusion control film,
- the ultraviolet absorbing layer is a pressure sensitive adhesive layer that contains an ultraviolet absorber,
- the light diffusion control film having an internal structure in the film, the internal structure comprising a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index,
- the light diffusion control film containing a weakly basic hindered amine-based compound having a carbonate skeleton, and
- the light transmittance of the ultraviolet absorbing layer at a wavelength of 380 nm is 1% or less.
Dependencies are inferred from the claim text.