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Color rendering of illumination light in display systems

  • US 7,131,762 B2
  • Filed: 07/26/2004
  • Issued: 11/07/2006
  • Est. Priority Date: 07/25/2003
  • Status: Active Grant
First Claim
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1. An illumination system for use in a projection system, comprising:

  • a light source producing light;

    a set of primary color filters producing a red, green, and blue color, each having a chromaticity coordinate in a chromaticity diagram; and

    a color rendering filter having a color whose chromaticity lies within a triangle zone in the chromaticity diagram, the triangle zone having a set of corner points defined by the chromaticity coordinates of the red, green, and blue primary colors but outside a white zone having corners with chromaticity coordinates of (0.355, 0.355);

    (0.305, 0.305);

    (0.285, 0.325); and

    (0.335, 0.375).

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