Apparatus and method for driving backlight

Details Apparatus and method for driving backlight Apparatus and method for driving backlight

2008-05-20

2008-05-20

Dinh, Trinh (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S308000, C315S291000, C315S2090SC

Reexamination Certificate

active

11402922

ABSTRACT:
The apparatus for driving a backlight includes a plurality of lamps each of which has first and second electrodes, a transformer for receiving an AC waveform to provide high voltage AC waveform to drive the plurality of lamps, a detection circuit for generating a detection voltage corresponding to the high voltage AC waveform, an accumulation operation unit for accumulating the detection voltage from the detection circuit and generating a shutdown signal voltage, and a controller for receiving an input voltage to provide the AC waveform to the transformer and for receiving the shutdown signal voltage to shutdown the plurality of lamps in response to the shutdown signal voltage.

REFERENCES:
patent: 6326740 (2001-12-01), Chang et al.
patent: 2005/0242752 (2005-11-01), Lyle et al.

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