Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Silicon controlled rectifier ignition
Reexamination Certificate
2006-09-25
2008-10-07
Tran, Thuy Vinh (Department: 2821)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Silicon controlled rectifier ignition
C315S2090SC, C315S246000
Reexamination Certificate
active
07432663
ABSTRACT:
A circuit (300) for igniting a high intensity discharge (HID) lamp comprises input terminals (302,304), output terminal (306,308), a charging circuit (RIGN,CIGN), a transformer (320) having a primary winding (322) and a secondary winding (324), a MOSFET (340), and a clamping diode (DCLAMP). During operation, ignitor circuit (300) provides a high voltage (VIGN) for igniting an HID lamp. Ignitor circuit (300) provides an ignition voltage (VIGN) having a peak magnitude that is more predictable and less prone to degradation due to the influences of parasitic components. Additionally, ignitor circuit (300) may be realized in a manner that is significantly more cost-effective than comparable prior art circuits.
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Kang Young G.
Kheraluwala Mustansir H.
Thangavelu Sivakumar
Ziegler Markus
Bessone Carlo S.
Le Tung X
Osram Sylvania Inc.
Tran Thuy Vinh
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