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Driving circuit for piezoelectric transformer, cold-cathode tube light-emitting apparatus, liquid crystal panel and device with built-in liquid crystal panel

  • US 20030102776A1
  • Filed: 11/27/2002
  • Published: 06/05/2003
  • Est. Priority Date: 11/29/2001
  • Status: Active Grant
First Claim
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1. A driving circuit for a piezoelectric transformer including a primary side electrode and a secondary side electrode formed on a piezoelectric body and converting an AC voltage input from the primary side electrode to output the converted AC voltage from the secondary side electrode, the driving circuit comprising:

  • a plurality of loads connected to a secondary side of the piezoelectric transformer; and

    a load state detector portion connected in series to the plurality of loads, for detecting an output state of each load, wherein driving of the piezoelectric transformer is controlled based on a detection signal from the load state detector portion.

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