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THREE-LEVEL LED BULB MICROPROCESSOR-BASED DRIVER

  • US 20140327369A1
  • Filed: 05/02/2013
  • Published: 11/06/2014
  • Est. Priority Date: 05/02/2013
  • Status: Active Grant
First Claim
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1. A light emitting diode (LED) bulb comprising:

  • a shell;

    a plurality of LEDs within the shell; and

    a driver circuit configured to operate the plurality of LEDs at a plurality of brightness levels, the driver circuit comprising;

    a first input configured to receive alternating current (AC);

    a second input configured to receive AC;

    a neutral input;

    a converter circuit connected to the plurality of LEDs;

    a first rectifier circuit connected to the first input and the neutral input, the first rectifier circuit configured to rectify the AC received at the first input into direct current (DC);

    a second rectifier circuit connected to the second input and the neutral input, the second rectifier circuit configured to rectify the AC received at the second input into DC;

    one or more detector circuits, the one or more detector circuits connected to the first rectifier circuit and the second rectifier circuit;

    a signal processing circuit having a first processor input and a second processor input, the signal processing circuit connected to the one or more detector circuits; and

    wherein the signal processing circuit is configured to produce a chop signal with a duty cycle, the duty cycle based on whether the first input is hot and whether the second input is hot; and

    wherein the converter circuit powers the plurality of LEDs at a driving current, the driving current based on the chop signal.

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