Patent ID: 7348940

Claim:
An energy recovery driving circuit for driving a load with a certain capacitance, comprising: a resonant inductor coupled to the load for alternately allowing a charge current or a discharge current to be applied to the load to flow through the resonant inductor; a primary coil of a transformer, coupled to the resonant inductor, the primary coil being coupled to both the resonant inductor and the load so as to alternately allow the charge current or the discharge current to flow through the primary coil when the charge current or the discharge current alternately flows through the load through the resonant inductor; at least one secondary coil of the transformer, coupled to the primary coil; and an energy recovery unit for generating a current according to the predetermined number of turns of the secondary coil in the secondary coil to allow the current flowing through the secondary coil to be recovered to a supply voltage source.