Optical projection system

Claim 1

An optical projection system capable of displaying an image having M×N pixels, wherein M and N are integers, comprising: a non-point white light source for emanating a white light along a first optical light path, wherein the white light has a first, a second and a third primary light beam, each of the primary light beams being of one of the primary colors; an array of M×N thin film actuated mirrors, each of the thin film actuated mirrors having a mirror, an actuator and an active matrix, each of the thin film actuated mirrors in the array being capable of changing the optical path of a reflected white light therefrom; a source stopper, provided with a source aperture having a specific configuration, placed on the first optical light path, for shaping the emanated white light from the non-point white light source into a predetermined configuration; a source lens, disposed between the source stopper and the non-point white light source, for focusing the emanated white light from the non-point white light source onto the source stopper; an optical means, having a reflection surface, for reflecting along a second optical light path the transmitted white light from the source stopper; a field lens, located between the optical means and the array of thin film actuated mirrors, for collimating the reflected white light from the reflection surface of the optical means onto the array of thin film actuated mirrors and for refocusing along a third optical light path the reflected white light from the array of the thin film actuated mirrors; a projection stopper, provided with a projection aperture, and located on the third optical light path, for passing a predetermined amount of the reflected white light from each of the thin film actuated mirrors in the array through the projection aperture thereof, to thereby modulate the intensity of the white light; a RGB pixel filter for dividing the white light from the projection stopper into the primary light beams; a projection screen for displaying an image comprised of M×N pixels thereon; and a projection lens for projecting the primary light beams from the RGB pixel filter onto the projection screen, thereby displaying the image of M×N pixels.