Patent ID: 6256145
Filing Date: 2001-07-03
Classification: G03B

Abstract:
A method for providing an improved rear projection display apparatus, comprising the steps of:providing an image source including a single projection lens for projecting a desired image as an image light;providing a transmissive screen unit including a Fresnel lens for gathering the image light, a lenticular lens for causing the image light gathered by said Fresnel lens to be incident thereon and having an external-light absorbing layer on an emergent side thereof, and a light diffusing structure for diffusing the image light incident on said lenticular lens;designing said light diffusing structure to have a light diffusion property representing a desired haze in a range between 60% and 80% which reduces scintillation within an allowable limit; andsetting a covering ratio per unit area of said external-light absorbing layer on said lenticular lens based on a diffusion property represented by said desired haze, so that rays from said lenticular lens, which is within an emergent angle at which luminance is a predetermined luminance, can pass through.