Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit
Reexamination Certificate
2008-01-22
2008-01-22
Vo, Tuyet (Department: 2821)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Impedance or current regulator in the supply circuit
C315S291000, C315S307000, C315S247000, C315S2090SC
Reexamination Certificate
active
10443525
ABSTRACT:
A driving circuit for providing a control signal to a power semiconductor device for providing power to a filament lamp, said driving circuit comprising an oscillator for generating said control signal. The driving circuit may further comprise a soft start circuit which controls said oscillator so as to avoid excessive current in said lamp at start-up; a voltage compensation circuit which controls said oscillator so as to compensate for variations in load; a shutdown circuit for shutting down and automatically restarting said oscillator in response to a fault condition; an adaptive dead time circuit which controls said oscillator for providing cool running of said power semiconductor device; and/or a dimming circuit which controls said oscillator for driving said lamp. The driving circuit and its control circuitry may be implemented in an integrated circuit.
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English Translation of Taiwan Official Letter issued Aug. 8, 2006.
Japanese Office Action dated Jan. 30, 2007 and translation.
Green Peter
Rusu Iulia
International Rectifier Corporation
Ostrolenk Faber Gerb & Soffen, LLP
Vo Tuyet
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