Amplification circuit and heat sink used with a light emitting apparatus having varying voltages

  • US 10,119,696 B2
  • Filed: 02/12/2013
  • Issued: 11/06/2018
  • Est. Priority Date: 06/25/2007
  • Status: Active Grant
First Claim
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1. A light emitting apparatus comprising:

  • a housing including a portion defining a thermally conductive outer surface;

    a high power LED light source positioned within the housing, wherein photometric output of the high power LED increases proportionately with supplied current, and wherein the high power LED is electrically coupled to a voltage source, and a pulse width modulation controller for controlling a duty cycle of supplied input voltage;

    a lens housed by the housing and aligned with the light source; and

    an internal heat sink located to thermally couple with the high power LED light source and conduct heat away from the light source, independent of another conducting medium, and transfer the conducted heat to the thermally conductive outer surface portion of the housing, upon being connected to the thermally conductive outer surface;

    wherein a junction temperature of the high power LED is maintained and controlled through the thermal coupling of the high power LED light source, the internal heat sink and the conductive outer surface portion of the housing.

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