Device and method for adjusting currents of lamp tubes

Details Device and method for adjusting currents of lamp tubes Device and method for adjusting currents of lamp tubes

2006-02-14

2006-02-14

Philogene, Haissa (Department: 2828)

Electric lamp and discharge devices: systems

Plural load device systems

C315S224000, C315S291000, C315S307000, C315SDIG002

Reexamination Certificate

active

06998797

ABSTRACT:
A device for adjusting currents of lamp tubes in a display. The device includes a feedback device, a first switch, a second switch, a main control device, a resonance circuit, a transformer, and a low-frequency switch controller. The low-frequency switch controller turns on the lamp tubes alternately. The feedback device monitors and adjusts the currents of the lamp tubes, thus the brightness of the lamp tubes are all the same.

REFERENCES:
patent: 5930121 (1999-07-01), Henry
patent: 6127785 (2000-10-01), Williams
patent: 6420839 (2002-07-01), Chiang et al.
patent: 6534934 (2003-03-01), Lin et al.

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