Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Silicon controlled rectifier ignition
Reexamination Certificate
2005-04-01
2008-12-02
Vo, Tuyet (Department: 2821)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Silicon controlled rectifier ignition
C315S2090SC, C315S2090SC, C315S224000, C315S246000
Reexamination Certificate
active
07459861
ABSTRACT:
A lamp contains a lamp voltage conversion circuit which includes a forward/reverse hybrid phase-control clipping circuit that clips a load voltage and provides an RMS load voltage to the lamp. The phase-control clipping circuit has a time-based pulse source that triggers conduction of the phase-control clipping circuit independently of line voltage magnitude during time periods spanning polarity changes of the load voltage that are separated by intervals when conduction is not triggered.
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Ballenger Matthew B.
Kendrick George B.
Weyhrauch Ernest C.
Bessone Carlo S.
OSRAM Sylvania Inc.
Vo Tuyet
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