Abstract
The newly developed external electrode fluorescent lamps (EEFLs) have the same structure as that of cold cathode fluorescent lamps (CCFLs). However, it contains less mercury and can drive many lamps with a single inverter. Hence, from the environment and cost considerations, its increasing application in large-sized LCD TV will be expected. It is worth to explore the fundamental driver technologies of EEFLs backlight system. The contributions of this thesis may be summarized as follows. First, a full bridge LCC resonant converter is adopted as the driver of the backlight system. Two isolated transformers are parallel–series connected to provide isolation and voltage boosting. Second, reactive power compensation at the secondary winding is made to reduce the voltage ampere rating and increase the efficiency. Finally, a prototype system is also constructed for verifying the feasibility of the proposed system.