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Method and apparatus of aligning color modulation data to color wheel filter segments

  • US 5,774,196 A
  • Filed: 06/13/1996
  • Issued: 06/30/1998
  • Est. Priority Date: 06/13/1996
  • Status: Expired due to Fees
First Claim
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1. A display system, comprising:

  • a light source generating light;

    a rotatable color wheel coloring said light having a plurality of colored segments and a reference marker, said segments interconnected at a spoke;

    a spatial light modulator modulating said colored light;

    a first sensor sensing said wheel reference marker and providing a first sensor output indicative of said sensed marker;

    a second sensor sensing a color of said colored light and providing a second sensor output indicative of said sensed color;

    a calibration circuit determining when said spoke is illuminated as a function of said first sensor output and said second sensor output and generating an output; and

    a control circuit controlling said spatial light modulator to modulate said colored light from said color wheel as a function of said calibration circuit output.

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