Patent ID: 7066602

Claim:
A projection system comprising: a light source; a color separator which separates an incident beam according to color; a scrolling unit, comprising at least one lens cell, which converts a rotation of the lens cell into the rectilinear motion of an area of the lens cell through which light passes so that an incident beam is scrolled; a light valve which processes a beam transmitted by the color separator and the scrolling unit according to an image signal and which forms a color picture, the light valve comprising a plurality of micromirrors independently driven according to image signals to change a reflection angle of incident light; and a projection lens unit which magntifies the color picture formed by the light valve and which projects the magnified color picture onto a screen; wherein the micromirrors are diagonally driven according to the image signals; and wherein the scrolling unit comprises first and second spiral lens disks installed apart from each other, each including at least one spirally disposed cylindrical lens cell, and a glass rod disposed between the first and second spiral lens disks.