Rear projection screen

Claim 1

A rear projection screen for a projector comprising: a transparent screen for receiving an incident projection beam from a projection lens from a rear side of said screen and for transmitting said received light toward an observer; a fresnel lens for collimating said projection beam, said fresnel lens being formed on one side of said screen where said projection beam from said projection lens is incident; a black absorbing body for absorbing an external light incident to said screen and for reflecting a light incident from said fresnel lens, said black absorbing body forming a triangular prism which is gradually narrowed from the observer's side towards the fresnel lens so as to have a predetermined angle in said screen, said absorbing body having two inclined surfaces formed in said screen being reflecting surfaces for reflecting incident lights thereunto; and a fine-mat-surface for dispensing said projection beam incident from a rear side of said screen and said reflected light reflected from the inclined surfaces of said black absorbing body, wherein said block absorbing body and said fine-mat-surface are formed on an observer's side of said screen, and wherein a surface of said black absorbing body on said observer's side of said screen and said fine-mat-surface are in a plane, and said black absorbing body and said fine-mat-surface are alternately formed in a layer, and neighboring layers, which include neighboring absorbing bodies and neighboring fine-mat-surfaces, partially overlap the layer to result in a screen having a checkered pattern.