Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Silicon controlled rectifier ignition
Reexamination Certificate
2006-05-30
2006-05-30
Vo, Tuyet Thi (Department: 2821)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Silicon controlled rectifier ignition
C315S2090SC, C315S2090SC, C323S320000, C323S325000, C323S300000
Reexamination Certificate
active
07053562
ABSTRACT:
A lamp includes a lamp voltage conversion circuit which converts a line voltage to an RMS load voltage by clipping or modulating a load voltage. The voltage conversion circuit includes a time-based signal source that triggers conduction in the voltage conversion circuit independently of line voltage magnitude. A transistor switch whose gate receives signals from the time-based signal source triggers the voltage conversion circuit. A microcontroller increases one of a rate and a duration of the signals from the time-based signal source sent to the gate of the transistor switch when starting the lamp.
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Ballenger Matthew B.
Kendrick George B.
Weyhrauch Ernest C.
Bessone Carlo S.
Osram Sylvania Inc.
Vo Tuyet Thi
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