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Method and device for supplying power to leds

  • US 20060234779A1
  • Filed: 06/28/2004
  • Published: 10/19/2006
  • Est. Priority Date: 07/16/2003
  • Status: Active Grant
First Claim
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1. A device for lighting at least one light emitting diode (LED) to be supplied with predefined minimum forward voltage and maximum current, comprising:

  • voltage supply means for supplying voltage to the light emitting diode, a pulse generator for generating a cyclic pulse signal having predefined on-times and off-times, a switch controlled by the pulse generator to be turned on during said on-times to short-circuit the light emitting diode and turned off during said off-times, an inductive device for being charged when the switch is turned on and for increasing the forward voltage over the light emitting diode when the switch is turned off.

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