Patent ID: 6508554
Filing Date: 2003-01-21
Classification: G02B,H04N

Abstract:
A projection-type image display apparatus comprising:a light source portion for emitting respective light beams of red, green and blue; a first optical system that the respective light beams from the light source portion enter; a rotating polygon mirror that the respective light beams having left the first optical system enter and that makes the respective light beams perform a scanning while reflecting the respective light beams; a second optical system for leading the respective light beams from the rotating polygon mirror to an illumination position; an image display panel that is arranged at the illumination position and provided with many pixels for modulating an incident light according to a color signal of red, green or blue; an image display panel driving circuit for driving each of the pixels of the image display panel by a signal corresponding to a color of light entering this pixel; and a projection optical system for magnifying and projecting an image of the image display panel; wherein belt-like regions illuminated by the respective light beams are formed substantially in parallel with each other on the image display panel and moved continuously by the scanning, thereby displaying a color image, and the second optical system comprises at least one lens and an optical element for rotating the respective light beams from the rotating polygon mirror substantially by 90Â° and directing them to the illumination position.