Patent ID: 6773111
Filing Date: 2004-08-10
Classification: G03B

Abstract:
A projection type display apparatus chromatically decomposing white light emitted from a light source into color light components, chromatically combining said color light components after image modulation, and projecting a desirable image onto a screen by using a projection lens; said apparatus comprising:color light decomposing means for decomposing said white light into a first color light component in three color light components and the remaining second and third color light components, and emitting thus obtained color light components into respective directions different from each other; a first optical device for guiding said first color light component emitted from said color light decomposing means to a first reflection type light valve for optically modulating said first color light component and emitting said first color light component optically modulated by said first reflection type light valve; a second optical device consisting of a polarization separating/combining device for separating said second and third color light components emitted from said color light decomposing means into said second and third color light components, guiding said two color light components to second and third light valves for optically modulating the respective color light components, combining said second and third color light components optically modulated by said light valves, and emitting thus combined color light components; and color light combining means for combining said first color light component emitted from said first optical device and said second and third color light components emitted from said second optical device; wherein a first lens comprising at least one lens element is disposed between said first optical device and said color light combining means; and wherein a second lens comprising at least one lens element is disposed between said second optical device and said color light combining means.