Patent ID: 7150532
Filing Date: 2006-12-19
Classification: G03B,H04N

Abstract:
1. A projection system comprising: a light source; a polarization conversion system having an incidence plane through which light emitted from the light source enters, which transmits a first polarized beam from the incident light and reflects a second polarized beam toward the incidence plane and changes the polarization of the second polarized beam; a reflection mirror which reflects the beam emitted from the incidence plane of the polarization conversion system and the light emitted from the light source toward the incidence plane; a color separator which separates an incident beam according to color; a scrolling unit including 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; and a projection lens unit which magnifies the color picture formed by the light valve and projects the magnified color picture onto a screen; wherein the scrolling unit includes first and second spiral lens disks, which are disposed apart from each other and each includes at least one cylindrical lens cell that is spirally arranged, and a glass rod installed between the first and second spiral lens disks.