Full color sequential image projection system incorporating time modulated illumination

  • US 5,903,323 A
  • Filed: 09/26/1996
  • Issued: 05/11/1999
  • Est. Priority Date: 12/21/1994
  • Status: Expired due to Fees
First Claim
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1. A system for directing intensity modulated electromagnetic energy comprising:

  • an intensity modulated light source modulated in intensity in accordance with a predetermined intensity modulation scheme in which a frame interval comprises a plurality of field periods each associated with a different intensity;

    a spatial light modulator for directing light from said source, said spatial light modulator including and array of energy directing elements, selected ones of said elements being selectively activated during each of the field periods in synchronism with said predetermined modulation scheme; and

    a timing and control circuit to selectively activate the selected elements of said spatial light modulator in response to a first signal representative of data within a single said frame interval and further operable to modulate said source in response to a second signal representative of individual said field periods within said single frame interval,wherein the first and second signals are synchronized to provide an overall system dynamic range greater than an effective dynamic range associated with said spatial light modulator.

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