Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate
2009-07-20
2011-11-29
Le, Don (Department: 2819)
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
C315S291000
Reexamination Certificate
active
08067904
ABSTRACT:
The present invention discloses an electronic ballast with dimming control from power line sensing for a fluorescent lamp, comprising: a control voltage generator, used to generate a control voltage according to a switching count of a power line; an oscillator, used to generate an oscillating signal, wherein the oscillating signal is of a fixed frequency and has a rising voltage portion and a falling voltage portion; and a comparator, used to generate a high side gating signal according to voltage comparison of the oscillating signal and the control voltage.
REFERENCES:
patent: 5798620 (1998-08-01), Wacyk et al.
patent: 7126288 (2006-10-01), Ribarich et al.
patent: 7414371 (2008-08-01), Choi et al.
patent: 2011/0169425 (2011-07-01), Sha et al.
Chen Pei-Yuan
Hung Chia-Chieh
Li Jian-Shen
Lin Ko-Ming
Su Wei-Chuan
Apex Juris pllc
Grenergy Opto, Inc.
Heims Tracy M.
Le Don
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