Holography projection screen for projection type video display device of television image receiver, consists of hologram to manage diffusion of optical energy coming out through back side of Fresnel lens

摘要

The Fresnel lens (110) has a lens pattern (111) in front side (113) for receiving optical energy from a light source. The optical energy comes out of the Fresnel lens through back side. The screen (100) consists of a hologram (26) fixed to back side of Fresnel lens to manage diffusion of optical energy coming out of lens back side.