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Optical bonding composition for LED light source

  • US 8,026,115 B2
  • Filed: 11/15/2007
  • Issued: 09/27/2011
  • Est. Priority Date: 11/17/2006
  • Status: Expired due to Fees
First Claim
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1. An LED light source comprising:

  • an LED die;

    an optical element optically coupled to the LED die; and

    a bonding layer comprising surface-modified metal oxide nanoparticles in an amorphous silicate network, the bonding layer bonding the LED die and the optical element together;

    wherein the surface-modified nanoparticles are selected from the group consisting of silicon oxide, aluminum oxide, zirconium oxide, titanium oxide, zinc oxide, tantalum oxide, niobium oxide, lanthanum oxide, strontium oxide, yttrium oxide, hafnium oxide, tin oxide, antimony oxide, and combinations thereof;

    and wherein the optical element comprises an optical glass having a refractive index of at least about 1.7.

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