For LED illumination System and the method for the current constant control in various operator scheme

For LED illumination System and the method for the current constant control in various operator scheme

  • CN 103,108,437 B
  • Filed: 11/15/2011
  • Issued: 11/25/2015
  • Est. Priority Date: 11/15/2011
  • Status: Active Grant
First Claim
Patent Images

1. , for being supplied to a system for one or more light-emitting diode to major general'"'"'s output current, this system comprises:

  • Control assembly, is configured at least receive demagnetization signal, sensing signal and reference signal, and at least generates control signal based on the information be associated with described demagnetization signal, described sensing signal and described reference signal;

    AndLogic and driven unit, be configured at least receive described control signal and at least based on the information be associated with described control signal to switch output drive signal;

    Wherein;

    Described switch is connected to the first diode terminal of diode and the first inductor terminals of inductor, and described diode also comprises the second diode terminal, and described inductor also comprises the second inductor terminals;

    Described second diode terminal and described second inductor terminals are configured to be supplied to described one or more light-emitting diode to output current described in major general;

    Described control signal is configured to described output current to be adjusted to predetermined constant current size,Described system also comprises demagnetization assembly, it is configured to the feedback signal directly or indirectly received from described first diode terminal and described first inductor terminals, and at least generate described demagnetization signal based on the information be associated with described feedback signal, andDescribed demagnetization signal comprises the one or more pulses be associated with one or more pulse duration respectively, and each pulse duration in described one or more pulse duration corresponds to the demagnetization period.

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