Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Discharge control discharge device load
Reexamination Certificate
2007-02-27
2007-02-27
Vo, Tuyet Thi (Department: 2821)
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Discharge control discharge device load
C315S276000, C315S279000, C315S282000, C315S2090SC
Reexamination Certificate
active
11011754
ABSTRACT:
An efficient and flexible current-mode driver delivers power to one or more light sources in a backlight system. In one application, the current-mode driver is configured as an inverter with an input current regulator, a non-resonant polarity-switching network, and a closely-coupled output transformer. The input current regulator can output a regulated current source in a variety of programmable wave shapes. The current-mode driver may further include a rectifier circuit and a second polarity-switching network between the closely-coupled output transformer and a lamp load. In another application, the current-mode driver delivers power to a plurality of light sources in substantially one polarity by providing a regulated current to a network of time-sharing semiconductor switches coupled in series with different light sources coupled across each semiconductor switch.
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PCT International Search Report and Written Opinion mailed Aug. 24, 2005, Appl. No. PCT/US04/41912, 10 pages.
Knobbe Martens Olson & Bear LLP
Microsemi Corporation
Vo Tuyet Thi
LandOfFree
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