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Microelectronic package having improved light extraction

  • US 7,023,022 B2
  • Filed: 11/14/2001
  • Issued: 04/04/2006
  • Est. Priority Date: 11/16/2000
  • Status: Active Grant
First Claim
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1. A light-emitting package comprising:

  • a substantially transparent substrate having a first surface and a second surface including a lens; and

    a light-emitting diode (LED) adapted to emit light having a predetermined wavelength, said LED being secured over the first surface of said substantially transparent substrate, wherein the second surface of said substrate defines a principal light emitting surface of said package, and wherein said lens at said second surface has a grating pattern that matches the predetermined wavelength of the light emitted from said LED for controlling the emission geometry of the light emitted by said package, wherein the grating pattern has a radial configuration including a series of circles, and wherein the series of circles are concentric circles.

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