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Fixed operating frequency inverter for cold cathode fluorescent lamp having strike frequency adjusted by voltage to current phase relationship

  • US RE44,133 E1
  • Filed: 11/13/2009
  • Issued: 04/09/2013
  • Est. Priority Date: 10/02/2003
  • Status: Active Grant
First Claim
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1. A method of driving a lamp that uses a DC to AC inverter that is connected to a winding of a transformer comprising:

  • (a) monitoring a phase relationship between a voltage across said winding of said transformer and a current through said winding of said transformer; and

    (b) keeping said phase relationship between said voltage across said winding of said transformer and said current through said winding of said transformer at substantially a predetermined relationship.

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