Patent ID: 9041868
Filing Date: 2015-05-26
Classification: G02B,G03B,H04N

Abstract:
1. A projection image display device for projecting an optical image formed by a plurality of illumination optical systems from a projection lens, wherein each of the plurality of illumination optical systems comprises: a light source for generating illumination light from a discharge lamp; a color separator for separating the generated illumination light into three color lights of R (red), G (green), and B (blue); three liquid crystal panels for forming optical images by irradiation of the respective color lights; and a color synthesis unit for synthesizing the optical images of the different color lights, wherein an optical axis of each of the light sources and an optical axis of the projection lens are positioned in the same plane, wherein all the optical axes of the respective light sources are oriented orthogonal to the optical axis of the projection lens, wherein in two illumination optical systems of the plurality of illumination optical systems, an optical path of the illumination light and an optical path of the color separator are rotated by 90 degrees with respect to each other.