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Trailing edge dimmer compatibility with dimmer high resistance prediction

  • US 8,547,034 B2
  • Filed: 11/16/2011
  • Issued: 10/01/2013
  • Est. Priority Date: 11/16/2010
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a controller to provide compatibility between a lamp and a trailing edge dimmer, wherein the controller is capable to;

    predict an estimated occurrence of a high resistance state of the trailing edge dimmer, wherein the high resistance state occurs when the trailing edge dimmer begins phase cutting an alternating current (AC) voltage signal;

    operate in a high current mode based on the estimated predicted occurrence of the high resistance state of the trailing edge dimmer; and

    operate in a low impedance mode after the AC voltage signal reaches a low voltage threshold.

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