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Light emitting device

  • US 8,878,423 B2
  • Filed: 12/30/2010
  • Issued: 11/04/2014
  • Est. Priority Date: 12/16/2010
  • Status: Active Grant
First Claim
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1. A light-emitting device, comprising:

  • an LED light source; and

    a light diffusion element covering at least a part of the LED light source,wherein the light diffusion element comprises a single layer formed by blending a first polymer having a first crystal diameter and a second polymer having a second crystal diameter smaller than the first crystal diameter, and then molding the blend, such that the first polymer and the second polymer are evenly blended in the single layer, and the first polymer directly physically contacts the second polymer,wherein the first polymer comprises polypropylene or ethylene-propylene copolymer, andwherein the second polymer comprises polyethylene, polypropylene, or ethylene-propylene copolymer.

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