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LED LIGHTING DEVICE AND ILLUMINATION APPARATUS INCLUDING SAME

  • US 20120153863A1
  • Filed: 12/13/2011
  • Published: 06/21/2012
  • Est. Priority Date: 12/20/2010
  • Status: Active Grant
First Claim
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1. An LED lighting device comprising:

  • a power converting unit for converting a power source voltage to a DC voltage and outputting the DC voltage to an LED unit; and

    an output control unit for controlling an output of the power converting unit,wherein the power converting unit has a chopper circuit including a series circuit of an inductance element and a capacitor;

    a switching element which is connected to the inductance element in series and turned on and off by the output control unit; and

    a diode serving as a discharging path of the inductance element during an OFF state of the switching element, andthe output control unit controls an on and off time of the switching element in such a way that a current supplied to the LED unit during a specific time period after a lighting operation is started becomes smaller than a current supplied to the LED unit in a steady state by using a voltage generated in a secondary coil of the inductance coil as an operating voltage thereof.

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