Matsushita Electric Works, Ltd.

Virginia Tech Intellectual Properties Inc

Dung A Tran

Fred C Lee

Hiroyasu Eriguchi

Jinghai Zhou

Masanao Okawa

Yan Jiang

A discharge lamp lighting control device () having a DC power converter, a power factor improving power converter (), a polarity reversing circuit (), a starter circuit (), and a controller (). The power factor improving power converterincludes a switching device S, a power factor improver, and a power converter. The power factor improver operates to smooth a rectified voltage by storing energy in a first inductive device Land by discharging energy from a second inductive device L, in which the first and second inductive devices are magnetically coupled together. The storing and discharging is performed by turning ON and OFF the switching device S. A predetermined DC voltage is converted by energy stored and discharged by a third inductive device Lin response to the turning ON and OFF of the switching device S.

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Wakefield, MA, United States of America

Dung A Tran