Method and apparatus for driving discharge lamps in a...

Electric lamp and discharge devices: systems – Current and/or voltage regulation – Plural regulators

Reexamination Certificate

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Reexamination Certificate

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11198029

ABSTRACT:
A technique is described that facilitates sensing current through a load. A method according to the technique includes mounting a discharge lamp in a floating point configuration, sensing current through the discharge lamp, and controlling current through the discharge lamp to improve power conversion efficiency. A device constructed according to the technique may include two AC voltage sources that are out-of-phase with respect to one another. A current sense circuit may be coupled between the AC voltage sources. When a load is connected to nodes of the AC voltage sources, the current sense circuit may sense current between the nodes that is associated with, or perhaps approximates, current through the load.

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Taiwan Pre-Action Notification. Taiwanese Patent Application No. 094126283. Sep. 30, 2006, English translation and original, 7 pages.

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