System and method for adjusting current of light-emitting diode

System and method for adjusting current of light-emitting diode

  • CN 103,781,257 A
  • Filed: 12/08/2011
  • Published: 05/07/2014
  • Est. Priority Date: 12/08/2011
  • Status: Active Application
First Claim
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1. for adjusting a system for one or more electric currents, this system comprises:

  • System controller, is configured to receive sensing signal to switch output drive signal and from the resistor that is connected to described switch and inductor, and described resistor and described inductor directly or are indirectly connected to one or more light-emitting diodes;

    Wherein;

    Described driving signal is associated with one or more switch periods, and each switch periods of described one or more switch periods comprises the ON time section of described switch and section deadline of described switch;

    The demagnetization period that each switch periods of described one or more switch periods equals a coefficient and is multiplied by the demagnetization process being associated with described inductor, described coefficient is greater than 1;

    AndThe peak value of the described sensing signal in the mean size of the first electric current and the each switch periods of described one or more switch periods of described one or more light-emitting diodes of flowing through is in proportion.

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