Driving apparatus for CCFL

Details Driving apparatus for CCFL Driving apparatus for CCFL

2007-10-23

2007-10-23

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S224000, C315S308000, C315S307000, C315S2090SC, C315S244000, C315SDIG002

Reexamination Certificate

active

11421219

ABSTRACT:
The invention relates to a driving apparatus for a CCFL capable of providing a high output voltage necessary for an open lamp and thereby satisfying a voltage standard required to drive the lamp. In the driving apparatus, an inverter made of a switching circuit of a half-bridge structure is used to generate current for driving the lamp. If the lamp is open, a tuning capacitor current of an oscillator, which provides a reference clock for driving a switch of the inverter is incremented so that a clock frequency which is a basis for a switching speed of the inverter is boosted. This consequently increases the switching speed of the inverter and then an output voltage.

REFERENCES:
patent: 6114814 (2000-09-01), Shannon et al.
patent: 6259615 (2001-07-01), Lin
patent: 6281642 (2001-08-01), Konishi et al.
patent: 6919694 (2005-07-01), Moyer et al.
patent: 6927989 (2005-08-01), Fukumoto
patent: 2006/0284570 (2006-12-01), Gong et al.
patent: 6243976 (1994-02-01), None

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