Patent ID: 6377000
Filing Date: 2002-04-23
Classification: H05B,Y02B,Y10S

Abstract:
An electronic ballast for a gas discharge lamp comprising:a power source section for receiving and transforming an AC power source to a DC voltage; an inverter section for switching and transforming an output voltage of said power source section at high speed to transform it as an AC power source in response to a paid of switching driving signals, and providing said AC power source to a gas discharge lamp; an inverter control section for generating said pair of switching driving signals respectively having a predetermined dead time within a switching-ON time interval while having a phase difference of 180 degrees form each other; an auxiliary power source section for supplying an auxiliary power source required in said inverter controlling section by means of said output voltage of said power source section; and a starting section for generating a high voltage when performing a starting operation; wherein said inverter section comprises a full-bridge type inverter circuit which includes a plurality of switching devices, a plurality of diodes and a first transformer combined with a current-stabilizing inductor; and a transformer for suppressing switching noises and for preventing said switching devices from being damaged by a transient current upon starting.