Patent ID: 9389346
Filing Date: 2016-07-12
CPC Classification: G02B,G02F

Claim Text:
1. A light diffusing film, comprising: a first region having a first refractive index; a substantially spherical shell-shaped refractive index modulation region surrounding the first region; and a second region having a second refractive index, the second region is positioned on a side of the refractive index modulation region opposite to the first region, wherein the light diffusing film has a light diffusion half-value angle of 30° or more and a thickness of 4 μm to 25 μm and satisfies the following expressions (1) and (2): where x represents the light diffusion half-value angle)(°) and y represents a backscattering ratio (%), the expressions (1) and (2) each representing a relationship between a numerical value for the light diffusion half-value angle and a numerical value for the backscattering ratio.