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Liquid crystal flat panel display with enhanced backlight brightness and specially selected light sources

  • US 6,448,955 B1
  • Filed: 06/08/2000
  • Issued: 09/10/2002
  • Est. Priority Date: 05/29/1998
  • Status: Expired due to Term
First Claim
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1. A method of selecting light source candidates for an illumination system, said illumination system being white-balance adjustable over a predetermined color temperature range, the method comprising the steps of:

  • (a) varying a percentage composition of red, green and blue phosphors to generate a first set and a second set of light source candidates;

    (b) from said first set and said second set, selecting a plurality of candidate pairs;

    (c) calculating combined luminance spectrums for one candidate pair of the plurality of the candidate pairs across various brightness levels of said light sources candidates;

    (d) from said combined luminance spectrums of said step (c), calculating a color temperature-luminance relationship for said candidate pair; and

    (e) rejecting said candidate pair unless said color temperature-luminance relationship satisfies a predefined selection criterion.

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