Patent ID: 6816307
Filing Date: 2004-11-09
Classification: G03B,H04N

Abstract:
A kind of rear projection screen, which includes:A Fresnel lens for collecting the image incident light; A cylindrical lens array for receiving the image light collected by the said Fresnel lens, and an ambient light absorbing portion and image light diffused transmission part formed at the image-light exit side; Wherein the said cylindrical lens array comprises a plurality of cylindrical lens elements, these cylindrical lens elements are in parallel and separated from each other, that is independent, and the adjacent cylindrical lens elements are arranged closely, so that there are no luminous flux loss therebetween; a strengthening area, which is provided with a rigid reinforced member connecting with cylindrical lens elements on two sides thereof, is formed on the area being from their contact portion to the image-light exit-side surface between adjacent cylindrical lens elements; an ambient light absorbing portion is formed on the image-light exit side in the strengthening area.