Patent ID: 6814450
Filing Date: 2004-11-09
Classification: G03B,H04N

Abstract:
A projection system to display an image on a screen, comprising:first and second light sources, separated by a predetermined distance from each other and radiating a single white light in parallel and in the same direction; first and second spiral lens discs comprising cylindrical lens cells arranged in a spiral shape and separating the single white light incident from the first and second light sources into a multi white light by converting a rotational motion of the cylindrical lens cells into a rectilinear movement of a cylindrical lens array; first and second spectroscopes separating the multi white light incident from the first and second spiral lens discs into color light beams having different wavelength bands; first and second light valves modulating the color light beams incident from the first and second spectroscopes according to an image signal to form the image; and first and second projection lenses projecting the color light beams modulated by the first and second light valves onto the screen to display the image.