Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Transformer in the supply circuit
Reexamination Certificate
2005-07-06
2008-10-21
Owens, Douglas W. (Department: 2821)
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Transformer in the supply circuit
Reexamination Certificate
active
07439685
ABSTRACT:
Methods and apparatus are disclosed for balancing currents passing through multiple parallel circuit branches and in some cases through parallel fluorescent lamps. Single transformers with multiple-leg magnetic cores are wound in specific manners that simplify current balancing. Conventional three-legged EE-type magnetic cores, with disclosed windings are used to balance current in circuits with three or more parallel branches, such as parallel connected Cold Cathode Fluorescent Lamps (CCFLs).
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Chen Wei
Kim Sangsun
A Minh Dieu
Lu Zhou
Monolithic Power Systems, Inc.
Owens Douglas W.
Perkins Coie LLP
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