Patent ID: 7175280

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 a rectilinear motion of an area of the lens cell through which light passes so that the 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 forms a color picture; a wire grid polarization beam splitter disposed in front of the light valve, which transmits or reflects an incident beam according to a polarization of the incident beam; a projection lens unit which magnifies the color picture formed by the light valve and reflected by the wire grid polarization beam splitter and projects the magnified color picture onto a screen; and first and second fly-eye lens arrays which are sequentially disposed on a light path between the scrolling unit and the light valve; wherein the color separator comprises first, second, and third dichroic filters, which are disposed in parallel between the scrolling unit and the light valve and which each reflect a beam of color and transmit beams of all other colors.