Patent ID: 7163293
Filing Date: 2007-01-16
Classification: H04N

Abstract:
1. A projection system comprising: light emitting units emitting light beams of different wavelengths; optical fibers disposed between the light emitting units and a collimating lens to respectively transmit the light beams; a scrolling unit having at least two discrete cylinder lenses spirally arranged to form at least two spiraling cells respectively corresponding to the at least two discrete cylinder lenses on a single disk which separate the light beams into color beams and scroll the color beams when the scrolling unit is rotated; a light valve that receives the color beams transmitted by the scrolling unit and forms a color image by turning pixels on or off according to an input image signal; first and second fly-eye lenses which receive the color beams transmitted by the scrolling unit, diverge the color beams, and transmit the color beams to the light valve; a first cylinder lens disposed between the light emitting units and the scrolling unit to control a width of the light beams emitted by the light emitting units; and a second cylinder lens paired with the first cylinder lens and disposed between the scrolling unit and the second fly-eye lens to collimate the color beams transmitted by the scrolling unit, the first and second cylinder lenses cooperating to control the width of the light beams incident upon the scrolling unit and the color beams on the first fly-eye lens.