Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Izumi Takaya0
Masashi Okamoto0
Takumi Hashimoto0
Date of Patent
July 3, 2007
Patent Application Number
11546283
Date Filed
October 12, 2006
Patent Primary Examiner
Patent abstract
A resonant transformer is disposed at a stage following an inverter for inverting the polarity of a voltage applied to a discharge lamp. A parallel resonant circuit is formed by a resonant capacitor and a primary winding of the resonant transformer, and a periodic voltage applying section is connected to the parallel resonant circuit. The periodic voltage applying section is operated at a frequency that causes resonance in the parallel resonant circuit, thereby applying a high AC voltage to the discharge lamp in a period in which discharge is started in the discharge lamp.
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