LAMP DRIVER CIRCUIT AND METHOD

摘要

The invention provides a lamp driver circuit for a discharge lamp in which a high frequency is used to initiate a discharge and a lower frequency is used to sustain the discharge. A tuned circuit boots the voltage at the starting frequency. In addition, a transformer is connected to the tuned circuit to provide a further boost to the starving voltage. The transformer core may be of a different material to that of the inductor of the tuned circuit, and is preferably selected to saturate during starting, to enhance the voltage spikes available for starting of the lamp.