Patent ID: 8553325

Claim:
A transmission type screen used for a rear projection type display apparatus for projecting image light from a rear surface thereof as seen from a viewer, comprising: a Fresnel lens screen for bending the image light from an emitter toward the viewer; and an image display element for imaging the image light from the Fresnel lens screen and expanding the image light at a dispersion angle, wherein the Fresnel lens screen includes: a Fresnel optical element including a prism formed on an incident surface side as seen from the emitter; and first light diffusion means for diffusing the image light passing through the Fresnel optical element, and wherein the image display element includes: a lens element for spatially dividing the image light from the Fresnel lens screen and changing a direction of the image light; a birefringent layer provided at a subsequent stage of the lens element, for mixing image light obtained by spatial division by the lens element; and second light diffusion means provided at a subsequent stage of the birefringent layer, for diffusing the image light passing through the birefringent layer.