Patent ID: 7033032
Filing Date: 2006-04-25
Classification: G03B

Abstract:
1. A projection display system comprising: a reflection display device which includes a plurality of pixels arranged in a matrix and which is adapted to project forward an image beam by controlling reflected light that is reflected by the plurality of pixels after entering the reflection display device from a front surface thereof; a light source system optical member for projecting an illumination beam toward the reflection display device from a direction inclined with respect to a front surface direction that is perpendicular to the front surface of the reflection display device; a projection system optical member for projecting the image beam projected from the reflection display device onto a projection surface; and a relay lens disposed on a front surface side of the reflection display device for: (i) correcting the illumination beam, which enters the relay lens from a surface thereof facing the light source system optical member and the projection system optical member, into a parallel beam which follows a direction inclined at a predetermined angle relative to the front surface direction of the reflection display device so that the parallel beam enters the reflection display device, (ii) causing the image beam projected from the reflection display device to enter the projection system optical member, and (iii) causing a part of the illumination beam from the light source system optical member that is surface reflected at the surface of the relay lens facing the light system optical member and the projection system optical member to be reflected in a direction other than a direction in which the image beam is projected by the projection system optical member.