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Semiconductor light source configured as a light tube

  • US 7,549,782 B2
  • Filed: 05/11/2006
  • Issued: 06/23/2009
  • Est. Priority Date: 05/11/2006
  • Status: Expired due to Fees
First Claim
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1. A light source comprising:

  • a semiconductor light source;

    a tube comprising a transparent medium, said tube having a side tube surface, a center curve, one end surface, a length, and a maximum cross-sectional dimension, said tube having scattering centers that cause light traveling in said tube to be reflected at angles such that said reflected light leaves said tube through said side tube surface;

    said semiconductor light source being positioned to emit light into said tube within a cone of angles such that said light will not leave said side tube surface in the absence of said scattering centers, wherein said length is greater than 10 times said maximum cross-sectional dimension;

    wherein said scattering centers are dispersed throughout said transparent medium; and

    phosphorescent material located at each of said scattering centers.

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