Light Extraction Film, Method for Producing Same, and Surface Light-Emitting Body
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United States of America Patent
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Issued Date -
Jun 16, 2016
app pub date -
May 20, 2014
filing date -
May 22, 2013
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Abstract
A light extraction film of the present invention relates to a light extraction film for EL elements, which enables a surface light emitting body to have a sufficiently improved luminance in the normal direction, while being sufficiently suppressed in emission angle dependence of the wavelength of light emitted therefrom. More specifically, the present invention relates to a light extraction film (10) which is laminated on a substrate of an EL element, and which has a recessed and projected structure (13) on the surface. The materials that constitute this light extraction film (10) contain a resin (X) that has at least one skelton selected from among a fluorene skeleton, a biphenyl skeleton and a naphthalene skelton.
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