Patent ID: 8384995

Claim:
A rear-surface projection-type video display apparatus, comprising: a transmission-type screen, which is disposed within an interior space of a room having external light, under a condition of exposing both surfaces thereof in said interior space of the room, and is configured to transmit a visual light projected onto a rear surface therethrough, so as to display it on a video display surface on a front surface; and a video projection apparatus, which is disposed at a predetermined position on a rear surface side of said transmission-type screen, and configured to project the visual light from a rear surface of said transmission-type screen, enlargedly, wherein: said transmission-type screen: has a linear Fresnel lens having Fresnel lens surfaces, covering over an entire light receiving surface for receiving the visual light, which is enlargedly projected from said video projection apparatus, the Fresnel lens is configured to guide the visual light received from said video projection apparatus into a direction perpendicular to said video display surface, and the Fresnel lens is configured to guide the external light within said interior space of the room, the external light emitted from a first direction differing from that of said video projection apparatus and guided in a second direction other than that perpendicular to said video display surface, and said transmission-type screen has a rectangular configuration, and the Fresnel lens surfaces making up the Fresnel lens, which is formed on the entire of the video display surface, are formed in a direction parallel with a longitudinal direction of said screen, linearly, aligning with each other.