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Circuit Arrangement and Method for Controlling at Least One Light Source

  • US 20090302769A1
  • Filed: 05/04/2007
  • Published: 12/10/2009
  • Est. Priority Date: 05/04/2006
  • Status: Active Grant
First Claim
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1. A circuit arrangement for controlling at least one light source, comprising:

  • a photodetector arranged to detect light from a first and a second light source;

    a sampling circuit coupled to the output of the photodetector;

    a control unit, which comprises a first filter having an input coupled to the sampling circuit and an output coupled to a first and a second output of the control unit;

    a first power-supply source, having a control input coupled to the first output of the control unit and which is adapted for controlling at least one parameter of the first light source; and

    a second power-supply source, having a control input coupled to the second output of the control unit and which is adapted for controlling at least one parameter of the second light source.

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