Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Silicon controlled rectifier ignition
Reexamination Certificate
2008-09-22
2011-12-27
Tran, Thuy Vinh (Department: 2821)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Silicon controlled rectifier ignition
C315S283000, C315S291000, C315S307000, C363S034000, C363S075000
Reexamination Certificate
active
08084952
ABSTRACT:
The invention discloses a method and system to detect zero current conditions in a buck inductor by monitoring the voltage across the buck inductor. Once zero current and voltage conditions are present, an inverter circuit changes the operational state, i.e. conducting or non-conducting, of the switching transistors driving the lamps to reduce power loss associated with changing the operational state of switching transistors when under a load.
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Qin Gao
Shiwei Yu
Sui Guo
Patterson Mark J.
Tran Thuy Vinh
Universal Lighting Technologies, Inc
Waddey & Patterson , P.C.
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