Patent ID: 8257821

Claim:
A light diffusion film comprising a biaxially stretched laminated film having a supporting layer comprising a crystalline polyester, and a light diffusion layer laminated on at least one side of the supporting layer by a co-extrusion method, wherein the light diffusion layer comprises 60 to 98 parts by mass of the crystalline polyester and 2 to 40 parts by mass of a light diffusion additive incompatible with the polyester, the light diffusion layer has a thickness that is 4% to 40% of total thickness of the biaxially stretched laminated film, and the light diffusion film has a planar orientation degree (ΔP) of 0.080 to 0.160, a total light transmittance of 85% or more, a haze of 30% or more, a surface haze of 20% or more, and an internal haze of 12% or less.