Patent ID: 7633238
Filing Date: 2009-12-15
Classification: H05B

Abstract:
1. A lamp driving device comprising: a first voltage converter that comprises a first output terminal, converts a direct current (DC) power voltage to a first pulse voltage, and periodically outputs the first pulse voltage through the first output terminal; a second voltage converter that comprises a second output terminal, converts the DC power voltage to a second pulse voltage having a polarity opposite to that of the first pulse voltage and a phase different from that of the first pulse voltage, and periodically outputs the second pulse voltage through the second output terminal; and a third voltage generator that is electrically connected to the first and second output terminals, wherein the third voltage generator generates an AC voltage having a swing width greater than a voltage difference between the first pulse voltage and the second pulse voltage in response to the first and second pulse voltages applied through the first and second output terminals, and supplies the generated AC voltage to a lamp.