Electric lamp and discharge devices: systems – Current and/or voltage regulation
Reexamination Certificate
2006-05-09
2006-05-09
Philogene, Haissa (Department: 2828)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
C315S2090SC, C315S244000, C315S282000, C315S2090PZ, C315SDIG002, C315SDIG002
Reexamination Certificate
active
07042171
ABSTRACT:
A multiple-CCFL parallel driving circuit and the associated current balancing control method for LCD are presented, wherein the circuit comprises a plurality of CCFLs for providing the backlight for a LCD; a boosting transformer with a plurality of outputs for providing the driving voltage and current for driving the plurality CCFLs; a plurality of ballast capacitors, the ballast capacitors connect between the boosting transformer and the CCFLs; and a multiple CCFL current balancing circuit. This invention uses a low cost current mirror circuit to equalize the driving current of a plurality of CCFLs and thus significantly improve the uniformity of the displayed image on a large-size LCD.
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Li Hsiu-Ying
Pai Kai-Jun
Philogene Haissa
Rosenberg , Klein & Lee
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