Patent ID: 6661552
Filing Date: 2003-12-09
Classification: G03B,H04N

Abstract:
A rear projection apparatus comprising a projector containing a light source and a liquid crystal cell, a mirror for reflecting a light from the projector, and a screen for projecting the light reflected by the mirror, the screen being composed of an optical film comprising an optical element capable of forming a spatial distribution of light transmittance, a light shield layer and a light diffusion layer, the light shield layer being positioned between the optical element and the light diffusion layer and being composed of a compound which changes light transmittance depending on irradiation of an energy beam, wherein the light transmittance passing the light shield layer is modulated spatially depending on a dose of the energy beam, and wherein the light shield layer and the light diffusion layer are positioned with a gap of no greater than 400 &mgr;m.