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Illuminator, projection display device, and method for driving the same

  • US 8,674,903 B2
  • Filed: 02/01/2010
  • Issued: 03/18/2014
  • Est. Priority Date: 05/30/2003
  • Status: Active Grant
First Claim
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1. A projection display device comprising:

  • a light source;

    a photosensor configured to measure brightness of a viewing environment;

    a light flux setting device configured to set a light flux emitted by the light source on the basis of image information;

    a dimming-range setting device configured to set a dynamic dimming range in which dimming is allowed, such that the brighter a brightness of a viewing environment measured by the photosensor is, the narrower the dimming-range setting device sets the dynamic dimming range;

    a light control device configured to adjust the light flux emitted by the light source on the basis of the light flux emitted by the light source set by the light flux setting device and the dynamic dimming range set by the dimming-range setting device;

    a light modulation device configured to modulate light adjusted by the light control device; and

    a projection device configured to project the light modulated by the light modulation device.

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