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A LIGHT SOURCE FOR LCD BACK-LIT DISPLAYS UTILIZING EMBEDDED LIGHT DETECTORS

  • US 20060243893A1
  • Filed: 04/28/2005
  • Published: 11/02/2006
  • Est. Priority Date: 04/28/2005
  • Status: Abandoned Application
First Claim
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1. A light source comprising:

  • a light pipe comprising a layer of material having top and bottom surfaces, said material being transparent to light in a transmission band of wavelengths, said layer having first and second opposing side surfaces that intersect said top and bottom surfaces; and

    a photodetector for measuring an intensity value for light traveling in said light pipe, said photodetector being embedded in said layer of material and generating a signal indicative of said measured intensity value for said light, said photodetector having a surface through which light that is measured by said photodetector passes, said surface being connected to said layer of material by a material having an index of refraction greater than that of air.

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