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Projection display system with varying light source

  • US 8,061,854 B2
  • Filed: 09/04/2008
  • Issued: 11/22/2011
  • Est. Priority Date: 11/01/2003
  • Status: Active Grant
First Claim
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1. A projection apparatus, comprising:

  • a light source;

    at least one spatial light modulator comprises a plurality of pixel elements controllable to operate in different modulation states for modulating an illumination light projected from the light source;

    a light source control unit controls and modulates the light source; and

    a spatial light modulator control unit receives and applies an input image signal for generating a control signal for driving the spatial light modulator, wherein the light source control unit further having a video image analysis unit for receiving and analyzing the control signal generated by the spatial light modulator control unit for applying video image analysis results for controlling the illumination light emitted from the light source for adjusting an emission intensity of the illumination light to change between a bright image and a dark image or adjusting a ratio between primary colors.

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