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LED with Particles in Encapsulant for Increased Light Extraction and Non-Yellow Off-State Color

  • US 20090057699A1
  • Filed: 09/04/2007
  • Published: 03/05/2009
  • Est. Priority Date: 09/04/2007
  • Status: Active Grant
First Claim
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1. A light emitting device comprising:

  • a semiconductor light emitting diode (LED);

    a layer of phosphor over the LED; and

    an encapsulant over the LED and phosphor directly contacting the phosphor, the encapsulant comprising a substantially transparent material containing inert non-phosphor particles, the particles being between 0.5%-10% by weight of the encapsulant, the particles having a substantially white color under white ambient light.

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