Patent ID: 6881473

Claim:
A light diffusing film comprising: a film comprising crystalline polymer compound C which is drawn and laminated to at least one face of an internal light-diffusing film comprising an islands-in-a-sea structure comprising a sea component of thermoplastic resin A and an islands component of thermoplastic resin B, wherein thermoplastic resins A and B have different refractive indexes, wherein flexural rigidity M (N.m) satisfies formula (2): M ≥ 3 × 10 8 × ( 1 - a 3 2 ⁢ ( α + 1 ) 3 ) × T t 3 ( 2 ) wherein the overall thickness of the light diffusing film is T t (m) and α is the lamination thickness ratio expressed by formula (1): α = T a T b , ( 1 ) wherein T a =film thickness of the internal light-diffusing film and T b =total film thickness of the drawn film comprising crystalline polymer compound C.