Method for improving the efficiency of discharging capacitive lo

Details Method for improving the efficiency of discharging capacitive lo Method for improving the efficiency of discharging capacitive lo

1998-03-16

2000-07-11

Ton, My-Trang Nu

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327423, H03K 300, H03B 100

Patent

active

060878630

ABSTRACT:
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.

REFERENCES:
patent: 4926354 (1990-05-01), Pattantyus
patent: 5270633 (1993-12-01), Dijkmans
patent: 5428522 (1995-06-01), Millner et al.
patent: 5741303 (1998-04-01), Kroll et al.
patent: 5784270 (1998-07-01), Permuy
patent: 5808884 (1998-09-01), Teggatz et al.
patent: 5821701 (1998-10-01), Teggatz et al.

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