Patent ID: 6917396

Claim:
A light-diffusing film capable of scattering an incident light in a light-advancing direction, wherein light-scattering characteristics Fx(θ) and Fy(θ) show a gradual decay pattern as a light-scattering angle θ becomes a wider angle, and a light-scattering characteristic F(θ) fulfills the following expressions representing the relationship between the light-scattering angle θ and a scattered light intensity F: Fy (θ)/ Fx (θ)≧1.01 (θ=4 to 30°) and 1.1 ≦Fy (θ)/ Fx (θ)≦20 (θ=18°), wherein Fx(θ) represents a light-scattering characteristic in an X-axial direction of the film and Fy(θ) represents a light-scattering characteristic in a Y-axial direction of the film.