Method and circuit for driving gas discharge lamps using a...

Details Method and circuit for driving gas discharge lamps using a... Method and circuit for driving gas discharge lamps using a...

2006-10-20

2010-06-08

Vu, David Hung (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S224000, C315S269000

Reexamination Certificate

active

07733036

ABSTRACT:
For driving one or more gas discharge lamps (2) to conduct or to block at any time and at the same time, a rectangular high voltage is generated from a high DC voltage, an alternating voltage with respect to a reference voltage (V−) is generated from the rectangular voltage, the alternating voltage is supplied to first electrodes (4) of the lamps, second electrodes (6) of the lamps are selectively connected to the reference voltage, a current flowing through each lamp is stabilized (26), the alternating voltage is filtered to provide a filtered voltage, a property of the filtered voltage is measured to provide a control signal, the control signal is used to control the frequency of the rectangular voltage, and the filtering has a response characteristic which is substantially identical to a response characteristic provided by a lamp when conducting and means for said stabilizing of current flowing through the lamp.

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patent: 2488763 (2005-06-01), None
patent: 07939154 (1996-10-01), None
patent: WO2004072733 (2004-08-01), None

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