Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Reexamination Certificate
2006-03-30
2009-12-01
Tso, Edward (Department: 2858)
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
C315S111410, C315S344000
Reexamination Certificate
active
07626835
ABSTRACT:
A plasma lighting system comprising a storage unit for storing duty ratios of first and second switching signals according to each material within a bulb by an experiment, a controlling unit for detecting an optimal duty ratio from the storage unit and outputting the first and second switching signals with the same phase corresponding to the detected duty ratio, and a converting unit for converting a direct current voltage into an alternating current voltage consisting of a positive square wave and a negative square wave according to the first and second switching signals, and a method for controlling the same.
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European Search Report dated Jun. 3, 2009.
Choi Joon-Sik
Jung Yun-Chul
Ked & Associates LLP
LG Electronics Inc.
Tso Edward
Williams Arun
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