Patent ID: 6176586
Filing Date: 2001-01-23
Classification: H04N

Abstract:
A projection display apparatus comprising:a first dichroic reflecting surface for separating a polarized light beam into a first light beam of a first wavelength range and a second light beam of a second wavelength range;a wavelength plate for rotating a polarization plane of the first light beam;a second dichroic reflecting surface for integrating at least a first portion of the first light beam, after rotation of the polarization plane of the first light beam, and at least a first portion of the second light beam;a first polarizing beam splitter for reflecting one and transmitting the other of the at least a first portion of the first light beam and the at least a first portion of the second light beam after integration of the at least a first portion of the first light beam and the at least a first portion of the second light beam by the second dichroic reflecting surface;a first reflection-type liquid crystal display device for modulating and reflecting a light beam reflected from the first polarizing beam splitter; anda second reflection-type liquid crystal display device for modulating and reflecting a light beam transmitted through the first polarizing beam splitter,wherein the first polarizing beam splitter transmits a light beam coming from the first reflection-type liquid crystal display device and reflects a light beam coming from the second reflection-type liquid crystal display device so as to integrate the light beam coming from the first reflection-type liquid crystal display device and the light beam coming from the second reflection-type liquid crystal display device.