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PROJECTOR

  • US 20090213336A1
  • Filed: 02/23/2009
  • Published: 08/27/2009
  • Est. Priority Date: 02/25/2008
  • Status: Active Grant
First Claim
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1. A projector comprising:

  • plural high-pressure discharge lamps;

    a high-pressure discharge lamp lighting device that lights the plural high-pressure discharge lamps;

    a light combining system that combines and outputs lights from the plural high-pressure discharge lamps;

    an electro-optical modulation device that modulates the light from the light combining system according to image information; and

    a projection system that projects the light modulated by the electro-optical modulation device,the high-pressure discharge lamp lighting device supplying alternating lamp currents having alternating-current waveforms with the same waveform and period and phases shifted by a predetermined amount with respect to each of the high-pressure discharge lamps to the respective plural high-pressure discharge lamps.

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