Patent ID: 7245429

Claim:
A rear projection type screen on which an image generated from an image generation source is projected, said rear projection type screen comprising: a Fresnel lens sheet disposed at least on the image generation source side; and a diffusion sheet disposed on an image monitoring side to diffuse image light to the image monitoring side, said Fresnel lens sheet including a first prism which is convex toward the image generation source side and a second prism which is convex toward the image monitoring side, wherein said first prism includes a total reflection surface provided in a first area on the image generation source-side face of said Fresnel lens sheet, with light of the projection image being incident on the first area at an angle of not smaller than a predetermined incidence angle, said total reflection surface totally reflecting the light incident on the first area and conducting the reflected light to the image monitoring side of said Fresnel lens sheet, a second area on said Fresnel lens sheet on which light of the projection image is incident at an angle of smaller than the predetermined incident angle is in a plane shape, and said second prism is formed in an area opposed to said second area on the image monitoring-side face of said Fresnel lens sheet and functions to refract and output light which has entered second area and passed through said Fresnel lens sheet.