Fujifilm Corporation

Masayuki Kusumoto

Tatsuya Oba

Megumi Sekiguchi

Natsuru Chikushi

Kenichi Kakishita

Satoshi Kuniyasu

Ryo Satake

A phosphor-containing film contains a phosphor such as a quantum dot and is capable of suppressing deterioration of phosphor even where the film is formed into a laminated structure; and a backlight unit including the phosphor-containing film as a wavelength converting member. The film includes: a phosphor-containing layer in which a plurality of fluorescent regions, each of which contains a phosphor that deteriorates through reaction with oxygen when exposed to oxygen, are discretely arranged and a resin layer having impermeability to oxygen is arranged among the plurality of the discretely arranged fluorescent regions; and a first substrate film and a second substrate film, which are respectively laminated on both main surfaces of the phosphor-containing layer, in which the resin layer has a Knoop hardness of 115 N/mmto 285 N/mm, a creep recovery rate of 22% or less, and an elastic recovery rate of 60% or more.

Phosphor-containing film and backlight unit

A phosphor-containing film capable of suppressing deterioration of phosphor and capable of suppressing generation of luminescent spots and the reduction in luminance due to a defect of the resin layer. The film includes: a phosphor-containing layer having a resin layer which has impermeability to oxygen and is provided with a plurality of discretely arranged concave portions, and a plurality of fluorescent regions, each of which is arranged in the concave portion of the resin layer and contains a phosphor that deteriorates through a reaction with oxygen when exposed to oxygen; and a first substrate film and a second substrate film, which are respectively laminated on one main surface and the other main surface of the phosphor-containing layer, in which the fluorescent regions contain a binder and quantum dots serving as the phosphor.

The wavelength conversion laminated film includes a laminate which has a wavelength conversion layer containing a phosphor and a gas barrier layer laminated on both the main surfaces of the wavelength conversion layer and an end face sealing layer which covers at least end faces of the wavelength conversion layer among end faces of the laminate, in which the end face sealing layer includes, from the side of the end faces of the laminate, a first metal layer coming into contact with the end faces, a resin layer, and a second metal layer in this order.

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Kanagawa, Japan

Masayuki Kusumoto