Patent ID: 6565211
Filing Date: 2003-05-20
Classification: G03B,H04N

Abstract:
A projection type display device, comprising:a secondary light source image forming optical system which forms plural secondary light source images on a predetermined surface from light beam flux emitted from a light source; a polarized light separating optical system which polarization separates light emitted from said plural secondary light source images into a first polarized light component and a second polarized light component; a color separating optical system which separates into plural colors, the first polarized light component emitted from said polarized light separating optical system; plural reflecting type light valves respectively arranged for each color light emergent from said color separating optical system, plural reflecting type light valves which modulate, based on image information, said first polarized light component to a second polarized light component; a color synthesizing optical system which color synthesizes and emits modulated lights respectively emitted from said plural reflecting type light valves; an analyzing optical system which analyzes said second polarized light component from light emitted from said color synthesizing optical system; a condenser lens which causes condensing of beam fluxes emitted from said plural secondary light source images, and also causes superposition, on the whole surface of respective plural reflection type light valves, of the light beam fluxes emitted respectively from said plural secondary light source images; and a field lens arranged between said plural secondary light source images and said plural reflecting type light valves, which converts each light flux emitted from said secondary light source image into a parallel light flux, and makes said each light flux advance in a different direction, wherein said polarizing separating optical system, and said analyzing optical system are arranged such that each parallel light beam flux is advancing in a different direction, and said plural reflecting type light valves are arranged such that said parallel light beam fluxes advancing from different directions are superposed.