Patent ID: 6118501
Filing Date: 2000-09-12
Classification: G03B,H04N

Abstract:
A projection display apparatus comprising:a reflective type display for displaying a two-dimensional image on a display surface;a projection optical system for projecting an enlargement image of the two-dimensional image displayed on the display surface onto a projection image surface, the projection optical system having a diaphragm; anda decentering optical element disposed between the diaphragm and the reflective type display and decentered with respect to the diaphragm, andwherein the following conditions are satisfied when an image center ray is defined by a line connecting a center position of the display surface and a center position of the projection image surface;.theta..sub.i <10.degree.5.degree.<.theta..sub.o <15.degree.where .theta..sub.i represents an angle formed by a normal line of the projection image surface and the image center ray, and .theta..sub.o represents an angle formed by a normal line of the display surface and the image center ray.