Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2007-10-09
2007-10-09
Owens, Douglas W. (Department: 2821)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C315S361000, C307S080000
Reexamination Certificate
active
11289153
ABSTRACT:
A ballast circuit including a charge pump interface circuit is disclosed to provide a method of isolating a switch from a power line used to power a ballast for supplying electrical power to a lamp. In addition, the charge pump interface circuit provides a method to control a discrete dimming ballast circuit which includes one or more inverters. The charge pump interface circuit offers cost advantages because no relays are necessary for isolation of the switch from the lamp electrical power and the dimming ballast circuit can be installed where existing lamps are currently mounted, without the need to add additional wiring.
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Haiyan Wang, “A Discrete Dimming Ballast for Linear Fluorescent Lamps”, paper submitted in partial fulfillment of requirement for degree, Master of Science at Cleveland State University, Dec. 2003, 57 pages, Cleveland, Ohio, USA.
General Electric Company
Owens Douglas W.
Vu Jimmy
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