Patent ID: 6952241
Filing Date: 2005-10-04
Classification: G02B,G03B,H04N

Abstract:
1. A video display apparatus comprising: an optical source unit for radiating light; a polarization converter for matching light, which is outputted by said light source unit, to one of S polarizing light and P polarizing light, said polarization converter comprising a polarizing beam splitter and a λ/2 phase difference plate; a light path changing element for changing a passing direction of light outputted by said polarization converter by substantially 90°; an optical characteristics switching element for electrically and periodically switching a wavelength band of the light outputted by said polarization converter; a video display element, as a reflection-type light valve element, for forming an optical image from the light outputted by polarization converter, in accordance with a video signal; a radiating device for radiating the light outputted by said polarization converter to said video display element to output light outputted by said video display element to a different direction from that of the light outputted by said polarization converter, said radiating device comprising a polarizing beam splitter; and a projector for projecting the light outputted by said video display element, the light outputted by said video display element being supplied via said radiating device, wherein a light path from said light source unit to said projector is U-shaped.