Apparatus for operating discharge lamps

Details Apparatus for operating discharge lamps Apparatus for operating discharge lamps

1994-07-11

1995-08-22

Deboer, Todd

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307110, 315209R, 315205, H05B 3700, H05B 3900

Patent

active

054443105

ABSTRACT:
An apparatus for operating discharge lamps with a stable electric current supply and minimal dimensional area requirements. The apparatus includes an input power source coupled across a capacitor, establishing a first loop circuit. A discharge lamp may also be connected across the capacitor, thereby forming a second loop circuit. A first switch repeatedly turns ON and OFF, making and breaking the first loop circuit at a first frequency, and thereby charges the capacitor. A second switch repeatedly turns ON and OFF, making and breaking the second loop circuit at a second frequency, and thereby discharges the capacitor through the discharge lamp. A control mechanism controls the first and second switches for supplying a predetermined current to the discharge lamp for flickerless operation.

REFERENCES:
patent: 3755686 (1973-08-01), Woods
patent: 3956638 (1976-05-01), Ahrens
patent: 4451743 (1984-05-01), Suzuki et al.
patent: 4897774 (1990-01-01), Bingham et al.
patent: 5309065 (1994-05-01), Nuckolls et al.

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