Patent ID: 9079396
Filing Date: 2015-07-14
Classification: B41J,H01L,H02P,Y02P

Abstract:
1. A method for driving a capacitive load using a target voltage waveform, the target voltage waveform having a trace comprising a peak voltage and an average voltage risetime component and voltage falltime component, wherein the trace comprises at least one voltage step on each of the voltage risetime and falltime components, the method comprising: sensing a voltage value representative of a voltage value on the capacitive load; substantially continuously comparing the sensed voltage value with the target voltage waveform; supplying power from an input to an output for charging a capacitive load to obtain a peak voltage and average rise slew rate in continuous response to the comparison of the sensed voltage value with the target voltage waveform; discharging the capacitive load to obtain an average fall slew rate in continuous response to the comparison of the sensed voltage value with the target voltage waveform; and returning the discharged power from the capacitive load to the input.