Converter circuit capable of self-reactivation and related...

Details Converter circuit capable of self-reactivation and related... Converter circuit capable of self-reactivation and related...

2011-05-03

2011-05-03

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S2090SC

Reexamination Certificate

active

07936133

ABSTRACT:
A converter circuit includes a detecting circuit, a PWM circuit, a control circuit, a switching circuit, and a power converting circuit. The detecting circuit generates a first or a second control signal based on the voltage level of a load. The PWM circuit outputs a power control signal when receiving the first control signal, or stops operations when receiving the second control signal. The control circuit outputs a backlight-off signal when receiving the second control signal, and outputs a backlight-on signal after outputting the backlight-off signal. The switching circuit stops operations when receiving the backlight-off signal, and reactivates the PWM circuit after receiving the backlight-on signal. The power converting circuit provides the voltage for driving the load based on the power control signal.

REFERENCES:
patent: 6359391 (2002-03-01), Li
patent: 6930898 (2005-08-01), Jeon et al.
patent: 7279852 (2007-10-01), Henry
patent: 7456581 (2008-11-01), Lee et al.

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