High efficiency squarewave voltage driver

Details High efficiency squarewave voltage driver High efficiency squarewave voltage driver

1992-01-31

1993-11-09

Williams, Howard L.

Electrical transmission or interconnection systems

Switching systems

Switch actuation

307113, 361246, 345211, G09G 300

Patent

active

052606066

ABSTRACT:
Presented is a device and method for providing a means of driving capacitive cells, such as those comprising suspended particle light valve windows, with a squarewave voltage signal at a select frequency with high efficiency and low power requirements. The invention uses an inductive circuit in parallel with the capacitive load of the capacitive cell, a dc voltage source, and a fast switching means connected to timely control the polarity of the voltage source to the capacitive cell.

REFERENCES:
patent: 4033673 (1977-07-01), Seki
patent: 4201984 (1980-05-01), Inami et al.
patent: 4201985 (1980-05-01), Inami et al.
patent: 4236107 (1980-11-01), Templin
patent: 4431989 (1984-02-01), Grange et al.
patent: 4573006 (1986-02-01), Newton
patent: 4618218 (1986-10-01), Shaw et al.

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