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Power source circuit apparatus for electro-luminescence device

  • US 4,982,314 A
  • Filed: 12/04/1989
  • Issued: 01/01/1991
  • Est. Priority Date: 12/09/1988
  • Status: Expired due to Fees
First Claim
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1. An electro-luminescence device lighting inverter comprising:

  • a DC-DC step-up circuit for boosting an input voltage to an electro-luminescence device lighting DC voltage, an oscillation frequency of said DC-DC step-up circuit being set to be higher than an audible frequency; and

    a DC-AC converter for converying a DC output from said DC-DC step-up circuit into an AC output of the electro-luminescence device lighting DC voltage;

    whereinsaid DC-AC converter is provided with an electro-luminescence device lighting oscillation circuit for oscillating a lighting signal having a predetermined frequency, and a switching circuit, controlled in response to the lighting signal from said electro-luminescence device lighting oscillation circuit, for converting a DC output from said DC-DC step-up circuit into the AC output;

    said switching circuit includes transistors ON/OFF-controlled in response to the lighting signal from said electro-luminescence device lighting oscillation circuit; and

    said AC output is supplied to the electro-luminescence device via a reactor connected in series with said electro-luminescence device to form a series resonance circuit generating a resonance voltage with a frequency lower than the predetermined frequency of the lighting signal.

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