Patent ID: 7049756
Filing Date: 2006-05-23
Classification: B41J,G09G,H01L

Abstract:
1. A capacitive load driving apparatus for charging and discharging a capacitive load, comprising: a plurality of energy accumulating elements for substantially dividing and accumulating electrostatic energy supplied from a power source; and switching means for selectively connecting the capacitive load and the plurality of energy accumulating elements, (A) when charging the capacitive load, the switching means selectively connecting the capacitive load and the plurality of energy accumulating elements such that the plurality of energy accumulating elements sequentially supply electrostatic energy to the capacitive load, and (B) when discharging the capacitive load, the switching means selectively connecting the capacitive load and the plurality of energy accumulating elements such that the plurality of energy accumulating elements sequentially collect electrostatic energy from the capacitive load, wherein: the plurality of energy accumulating elements respectively have terminal voltages which are different from one another; and when charging the capacitive load, the switching means sequentially connects the capacitive load with the energy accumulating elements in an ascending order of absolute values of the terminal voltages and when discharging the capacitive load, the switching means sequentially connects the capacitive load with the energy accumulating elements in a descending order of the absolute values of the terminal voltages.