Patent ID: 7138994

Claim:
A method of driving a display panel having panel electrodes and corresponding panel capacitance, comprising: (a) charging the panel capacitance using an inductor, wherein (i) initially prior to charging the panel capacitance, increasing an energy in the inductor until a magnitude of an inductor current reaches a first prescribed level which is less than a maximum, and (ii) while charging the panel capacitance, obtaining a maximum current of the inductor and thereafter removing the stored energy from the inductor until the inductor current reaches a second prescribed level which is greater than zero; and (b) discharging the panel capacitance by recovering a reactive energy of the panel capacitance using the inductor, wherein during step (a)(ii) and prior to step (b), clamping a voltage level of the panel capacitance upon the inductor current reaching the second prescribed level, which is greater than zero.