REAR PROJECTION SCREEN

摘要

The present invention relates to a rear projection screen (1) for allowing an observer to view an image at a front side by receiving light projected at a rear side. The rear projection screen comprises a transparent plate (3); an optical sheet (8; 8') which is hot-pressed on a rear surface of the transparent plate (3) and includes a plurality of fine prisms (5; 5') formed from side to side and parallel to one another to refract the light and guide the refracted light to the front side, each fine prism protruding to the rear side; a diffusion film (20) which is bonded to a front surface of the transparent plate (3) and including a transparent film (2) and diffusion layers (6) formed on front and rear surfaces of the transparent film to omni directionally disperse and diffuse the light refracted through the optical sheet (8; 8'); and light-shielding printed layers (4) which are formed on an upper surface of the diffusion layer (6) to be horizontally parallel to one another and face portions between the fine prisms (5; 5') of the optical sheet (8; 8'). According to the rear projection screen of the present invention so configured, there is no reflected image on a surface on the side of an observer even under a bright environment such as the presence of sunlight, and a extremely precise color image with a high black level can be obtained. Further, a large-sized screen with less light loss can be manufactured at a low cost by first refracting light emitted from a projector through a fine prism optical sheet and then diffusing the refracted light.