Electric lamp and discharge devices: systems – Current and/or voltage regulation – Plural load device regulation
Reexamination Certificate
2011-04-12
2011-04-12
Chang, Daniel D (Department: 2819)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Plural load device regulation
C315S224000, C315S20000A, C315S201000
Reexamination Certificate
active
07923941
ABSTRACT:
The present application claims a compact low cost topology solution of a ballast for a discharge lamp that can provide both high power factor and low total harmonic distortion with fewer components than prior art. The topology provides the feature of a low crest factor and quick start that increase both the lamp life and the number of starts for the product. By using Bipolar Junction Transistor instead of Field Effect Transistor as the main switches and also a lower value electrolytic, the cost and size are considerably reduced.
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PCT/US2009/056891 Search Report, mailed Dec. 2, 2009.
Chen Timothy
Chichernea Virgil A.
Skully James K.
Chang Daniel D
Fay Sharpe LLP
General Electric Company
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