Patent ID: 6271965
Filing Date: 2001-08-07
Classification: G03B

Abstract:
A rear projection screen comprising:a lens sheet comprising a Fresnel lens part, a lenticular lens part, and a non-diffusing part,wherein said Fresnel lens part is placed on a light-entering side and comprises at least one diffusing part; said lenticular lens part is placed on a light-emerging side and comprises at least one diffusing part; said Fresnel lens part and said lenticular lens part are spaced apart from each other by the non-diffusing part; the diffusing part of said Fresnel lens part is provided on a light-entering side surface of the lens sheet; the diffusing part of said lenticular lens part is provided on a light-emerging side surface of the lens sheet; the diffusing part of said Fresnel lens part has a diffusing power lower than the diffusing power of the diffusing part of said lenticular lens part; and the diffusing part of said Fresnel lens part is formed by incorporating first diffusive fine particles into a first base material, and the diffusing part of said lenticular lens part is formed by incorporating second diffusive fine particles into a second base material, wherein a refractive index difference between the first diffusive fine particles and the first base material is smaller than a refractive index difference between a refractive index of the second diffusive fine particles and the second base material.