Patent ID: 8337021
Filing Date: 2012-12-25
Classification: G02B,G03B,H04N

Abstract:
1. A projection type image display device for displaying an image by projecting the image on an imaging surface, comprising: three image display elements for displaying red light, green light and blue light; an illumination optical system for illuminating the three image display elements; a color synthesis unit for color-synthesizing the red, green and blue light received from the three image display elements; a polarization converter which is a color-selective polarization rotator and adjusts light received from the color synthesis unit to p-polarized light; a projection optical system which outputs light supplied from the polarization converter in a direction inclined by a predetermined inclination angle; and a flat mirror which reflects light received from the projection optical system in a direction for protection, wherein the projection optical system includes a plurality of lenses including one lens disposed closest to the flat mirror, the one lens having an effective area, along a vertical direction of the image, through which a light beam passes and which is off an optical axis of the other lenses.