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

2011-08-16

2011-08-16

Choi, Jacob Y (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S291000

Reexamination Certificate

active

07999494

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 control voltage generator, used to generate a control voltage according to the count of said switching sensing signal; a voltage controlled oscillator, used to generate an oscillating signal according to the control voltage; and a non-overlapping driver, used to generate a high side driving signal and a low side driving signal according to the oscillating signal.

REFERENCES:
patent: 5798620 (1998-08-01), Wacyk et al.
patent: 6949888 (2005-09-01), Ribarich
patent: 7408307 (2008-08-01), Ribarich
patent: 7551463 (2009-06-01), Ros et al.

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