Patent ID: 7857463

Claim:
A projection display system, comprising: a light source for producing light of at least one primary color; a graphics driver, for generating control signals according to a sequence of images to be displayed; a spatial light modulator for modulating the light of at least one primary color responsive to control signals from the graphics driver; projection optics, comprising: a rear group of lenses of spherical curvature, arranged as a telecentric lens group for modulated light received from the spatial light modulator; a first aspheric lens, receiving light from the rear group of lenses; a folding mirror comprising two planar surfaces, for redirecting light from the first aspheric lens; and a second aspheric lens, receiving light from the folding mirror and having a magnification greater than 1.0; an aspheric mirror, for reflecting light received from the second aspheric lens; and a projection screen, positioned to receive the reflected light from the aspheric mirror.