| 摘要 |
A method for improving the efficiency of H-bridge electrical switching devices that drive a capacitive load such as electroluminescent lamps, liquid crystal devices and piezoelectric transducers. The method provides for discharge steps that first discharge the capacitive load to a difference in voltage potential of zero (0) volts before re-charging from the opposite side. By implementing the method, the DC power supply will only be required to charge the capacitive load from zero (0) volts to +Vcs volts, rather than +Vcs volts to -Vcs volts as in prior art. With less energy required from the DC power supply to accomplish the same result, a more efficient switching network is achieved.
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