Patent ID: 7887189
Filing Date: 2011-02-15
Classification: G03B,H04N

Abstract:
1. A projection type display apparatus, comprising: a color separation optical system configured to separate light from a light source into a plurality of light fluxes of different colors; a plurality of reflection type light valve devices provided individually for the color light fluxes; a plurality of polarization beam splitters each configured to polarize and separate a predetermined one of the color light fluxes separated by said color separation optical system by means of a polarization separation portion such that the predetermined color light flux is emitted to a corresponding one of said reflection type light valve devices and then polarize and separate the light coming in from the reflection type light valve device by means of said polarization separation portion; and a light reception device provided for one or more of said polarization beam splitters and configured to detect light emitted from a second face from among faces of the predetermined polarization beam splitter which is opposite to a first face to which the predetermined color light flux from said color separation optical system is introduced.