Electric lamp and discharge devices: systems – Load device in the primary and secondary circuit of the...
Reexamination Certificate
2007-11-13
2007-11-13
Owens, Douglas W. (Department: 2821)
Electric lamp and discharge devices: systems
Load device in the primary and secondary circuit of the...
C315S246000, C310S317000, C310S323090, C323S215000, C323S253000, C323S307000
Reexamination Certificate
active
10959667
ABSTRACT:
A ring balancer comprising a plurality of balancing transformers facilitates current sharing in a multi-lamp backlight system. The balancing transformers have respective primary windings separately coupled in series with designated lamps and have respective secondary windings coupled together in a closed loop. The secondary windings conduct a common current and the respective primary windings conduct proportional currents to balance currents among the lamps. The ring balancer facilitates automatic lamp striking and the lamps can be advantageously driven by a common voltage source.
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Knobbe Martens Olson & Bear LLP
Microsemi Corporation
Owens Douglas W.
Tran Chuc
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