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Method and apparatus for increasing color gamut of a display

  • US 6,648,475 B1
  • Filed: 05/20/2002
  • Issued: 11/18/2003
  • Est. Priority Date: 05/20/2002
  • Status: Expired due to Term
First Claim
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1. A color projection system comprising:

  • (a) a first light source for providing a first color beam;

    (b) a first spatial light modulator for modulating said first color beam to provide a first modulated color beam on a first optical axis;

    (c) a second light source for providing a second color beam;

    (d) a second spatial light modulator for modulating said second color beam to provide a second modulated color beam on a second optical axis;

    (e) a third light source for providing a third color beam for transmission through a first color combiner;

    (f) a third spatial light modulator for modulating said third color beam to provide a third modulated color beam;

    (g) a fourth light source for providing a fourth color beam for reflection by said first color combiner;

    (h) a fourth spatial light modulator for modulating said fourth color beam to provide a fourth modulated color beam;

    (i) a polarizing beamsplitter for combining said third and fourth modulated color beams onto a third optical axis;

    (j) a second color combiner for combining the light on said first, second, and third optical axes to form a multicolor modulated beam; and

    (k) a projection system for projecting said multicolor modulated beam.

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