Discharge-lamp lighting apparatus

Details Discharge-lamp lighting apparatus Discharge-lamp lighting apparatus

2007-06-28

2010-06-29

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S307000

Reexamination Certificate

active

07746004

ABSTRACT:
A discharge-lamp lighting apparatus includes series circuits connected to each end of a DC power source, a transformer, FETs Qp1, Qn1, Qp2, and Qn2, and a drive circuit. The drive circuit includes transistors Q1and Q3to discharge gate-source capacitances of the Qp1and Qp2, resistance elements to determine gate potentials of the transistors Q1and Q3when the transistors Q1and Q3are turned on, transistors Q2and Q4to charge the gate-source capacitances of the Qp1and Qp2, constant current circuits, and switches connected in series with the series circuits of the constant current circuits and resistance elements, respectively, to turn on/off the constant current circuits.

REFERENCES:
patent: 7368881 (2008-05-01), Suganuma et al.
patent: 7394209 (2008-07-01), Lin et al.
patent: 7515446 (2009-04-01), Lin
patent: 7564197 (2009-07-01), Kimura et al.
patent: 11-298308 (1999-10-01), None
patent: 2003-164163 (2003-06-01), None

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