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Driving apparatus of light emitting diode and driving method thereof

  • US 8,288,969 B2
  • Filed: 02/10/2012
  • Issued: 10/16/2012
  • Est. Priority Date: 09/16/2009
  • Status: Active Grant
First Claim
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1. A driving method of a light-emitting diode (LED), adapted to a driving apparatus, the driving method comprising:

  • receiving a dimming signal;

    detecting whether the driving apparatus performs dimming;

    if the driving apparatus performs dimming, determining whether a duty cycle of the dimming signal is smaller than a predetermined value;

    when the duty cycle of the dimming signal is not smaller than the predetermined value, regulating respective current magnitudes of a plurality of driving currents according to the dimming signal, and outputting each of the driving currents for a full time of a period; and

    when the duty cycle of the dimming signal is smaller than the predetermined value, outputting each of the driving currents for a partial time of a period.

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