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Title:
DISCHARGE LAMP LIGHTING CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO2004095668
Kind Code:
A3
Abstract:
A discharge lamp lighting control device (100) having a DC power converter, a power factor improving power converter (1), a polarity reversing circuit (2), a starter circuit (3), and a controller (4). The power factor improving power converter 1 includes 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 L1 and by discharging energy from a second inductive device L2, 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 L3 in response to the turning ON and OFF of the switching device S.

Inventors:
LEE FRED C (US)
ZHOU JINGHAI (US)
JIANG YAN (US)
OKAWA MASANAO (US)
TRAN DUNG A (US)
ERIGUCHI HIROYASU (US)
Application Number:
PCT/US2004/010963
Publication Date:
March 24, 2005
Filing Date:
April 22, 2004
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC WORKS LTD (JP)
VIRGINIA TECH INTELL PROP (US)
LEE FRED C (US)
ZHOU JINGHAI (US)
JIANG YAN (US)
OKAWA MASANAO (US)
TRAN DUNG A (US)
ERIGUCHI HIROYASU (US)
International Classes:
H02M1/42; H05B41/288; (IPC1-7): H05B41/16; H05B37/02
Foreign References:
US5598326A1997-01-28
US5907223A1999-05-25
US6034489A2000-03-07
US6670779B22003-12-30
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