Electronic ballast with dimming control from power line sensing

Details Electronic ballast with dimming control from power line sensing Electronic ballast with dimming control from power line sensing

2011-07-19

2011-07-19

Le, Don (Department: 2819)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315SDIG002, C315S224000

Reexamination Certificate

active

07982413

ABSTRACT:
The present invention discloses an electronic ballast with dimming control from power line sensing for a fluorescent lamp, comprising: a line switching sensing circuit, used to generate a switching sensing signal by performing a voltage comparison operation on a DC voltage, and generate a reset signal according to the off time of the power line; a dimming voltage generator, used to generate a dimming voltage according to a count of the switching sensing signal; and a phase-controlled non-overlapping driver, used to generate a high side driving signal and a low side driving signal for delivering a lamp current according to the dimming voltage, wherein the dimming voltage is used to generate a phase, and the phase is used to generate the lamp current.

REFERENCES:
patent: 7279853 (2007-10-01), Chong
patent: 7508142 (2009-03-01), Green
patent: 7558081 (2009-07-01), Green et al.
patent: 2004/0174122 (2004-09-01), Ribarich
patent: 2005/0088112 (2005-04-01), Chong
patent: 2005/0156534 (2005-07-01), Oh

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