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Trailing edge dimmer compatibility with dimmer high resistance prediction

  • US 9,155,163 B2
  • Filed: 08/28/2013
  • Issued: 10/06/2015
  • 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 configured to;

    predict an estimated time when the trailing edge dimmer enters a high resistance state, wherein the time when the trailing edge dimmer enters 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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