Lighting device for discharge lamp

Details Lighting device for discharge lamp Lighting device for discharge lamp

2007-10-16

2007-10-16

Dinh, Trinh Vo (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

C315S276000, C315S2090SC

Reexamination Certificate

active

11047857

ABSTRACT:
An inductor for performing a chopper operation by turning on or off a first switching element MOSFET Q1and obtaining an increased voltage is arranged on the secondary side of a transformer112and on the basis of the turn ratio of the transformer112, a high voltage at the time of stable lighting can be obtained from a DC power source111at a low voltage Vin. Further, when the on-duties of the first and second switching elements MOSFET Q1and Q2constituting an inverter circuit are made almost similar, the timings of application of the power to both ends of a lamp144can be made similar, so that the life span of the lamp can be improved.

REFERENCES:
patent: 6081075 (2000-06-01), Littlefield
patent: 2004/0113567 (2004-06-01), Yamauchi et al.
patent: 2004/0183380 (2004-09-01), Otake
patent: 2004/0183472 (2004-09-01), Kamoi et al.
patent: 2004/0251852 (2004-12-01), Kambara et al.
patent: 2005/0057181 (2005-03-01), Izumi et al.

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