High voltage discharge lamp device

摘要

A high voltage discharge lamp device may include a step-up DC-DC converter connected to a power switch; polarity switching elements for alternatively changing the polarities of the electric voltage outputted from the step-up DC-DC converter; and a polarity switching drive circuit for activating the polarity switching elements. Also, a high voltage discharge lamp device may include a pair of first and second step-up DC-DC converters connected to a power switch; polarity switching elements for alternatively changing the output polarities of the respective first step-up DC-DC converter and the second step-up DC-DC converter; and a polarity switching drive circuit for activating the polarity switching elements. The polarity switching drive circuit operates in synchronization with the on/off actions of the power switch, or in synchronization with either ultra low-frequency signals or low-frequency signals.