Electric lamp and discharge devices: systems – Pulsating or a.c. supply – With power factor control device
Reexamination Certificate
2007-09-25
2007-09-25
Vo, Tuyet (Department: 2821)
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
With power factor control device
C315S246000, C315S308000, C315S291000, C315S274000
Reexamination Certificate
active
11091270
ABSTRACT:
The invention provides a power supply or drive circuit for a pulsed flashlamp which utilizes a two-core component having common windings as both an inductor for arc mode drive and for breakdown triggering of the lamp. Discharge of a capacitor through the inductor and lamp is controlled by a high-speed semiconductor switch which is turned on and off by a suitable control, current flowing from the inductor through a one-way path including the lamp when the switch is off. The control maintains the ratio of the power variation through the lamp to the average power through the lamp substantially constant. The controls may also be utilized to control output pulse shape. Novel protective features are also provided for circuit components during turn on periods for the switch.
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Gnatyuk Peter O.
Inochkin Mikhail
Togatov Vycheslav V.
Engellenner Thomas J.
Miller Deborah A.
Nutter & McClennen & Fish LLP
Palomar Medical Technologies, Inc.
Vo Tuyet
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