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Spherical bulb for light-emitting diode with spherical inner cavity

  • US 7,663,315 B1
  • Filed: 11/27/2007
  • Issued: 02/16/2010
  • Est. Priority Date: 07/24/2007
  • Status: Expired due to Fees
First Claim
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1. A bulb adapted to fit over and around a light-emitting diode emitting a light of a first hue in a generally Lambertian radiation pattern, said bulb having a generally spherical shape and a substantially circular external cross-sectional geometry, said bulb defining an inner cavity with a substantially circular cross-sectional geometry for housing the light-emitting diode, and said bulb being composed of a substantially homogenous mixture of a light-transmitting material and a light color-converting material, said light color-converting material converting the light of the first hue into a light of a desired hue, which is then viewed along an external surface of said bulb, and wherein the light of the first hue emitted along a vertical axis of the bulb passes through a greatest amount of the light color-converting material of the substantially homogenous mixture, while the light of the first hue emitted at the bottom edge of the bulb passes through a minimal amount of the light color-converting material of the substantially homogenous mixture.

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