Cold cathode fluorescent lamp inverter apparatus

Details Cold cathode fluorescent lamp inverter apparatus Cold cathode fluorescent lamp inverter apparatus

2011-08-09

2011-08-09

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S308000, C315S291000

Reexamination Certificate

active

07994736

ABSTRACT:
A cold cathode fluorescent lamp inverter apparatus includes a series circuit connected to a DC power source and including first and second switching elements, a series circuit connected between a connection point of the first and second switching elements and the DC power source and including a primary winding of a transformer, a reactor, and a capacitor, a cold cathode fluorescent lamp connected to a secondary winding of the transformer, a current detector connected to the cold cathode fluorescent lamp and to the secondary winding, to detect a value of a current passed through the cold cathode fluorescent lamp, and a controller to turn on/off the first and second switching elements alternately with each other according to the detected current value. The current detector detects a ripple component in the DC power source, and corrects the current of the cold cathode fluorescent lamp according to the detected ripple component.

REFERENCES:
patent: 6118224 (2000-09-01), Murakami et al.
patent: 11-26178 (1999-01-01), None

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