Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Silicon controlled rectifier ignition
Reexamination Certificate
2004-12-03
2008-10-07
Tran, Thuy Vinh (Department: 2821)
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Silicon controlled rectifier ignition
C315S226000, C315S291000, C315S360000
Reexamination Certificate
active
07432660
ABSTRACT:
The present invention relates generally to a simple, low cost ballast for fluorescent lamps that incorporates an integrated circuit and a number of ballast protection functions to cost effectively enhance its reliability. End of lamp life circuitry is provided to shut down the ballast when rectification currents due to lamp aging exceed a predetermined level. This circuitry also functions to stop the ballast operation when the lamp's voltage exceeds a predetermined cutoff level for a set period of time. Re-ignition circuitry is provided that restarts the ballast when new lamps are installed without shutting off the ballast. Multiple striking attempt circuitry is provided that initiates a predetermined number of striking attempts such that cold or old lamps are quickly ignited without the introduction of excessive flickering.
REFERENCES:
patent: 5436529 (1995-07-01), Bobel
patent: 5493180 (1996-02-01), Bezdon et al.
patent: 5500576 (1996-03-01), Russell et al.
patent: 5636111 (1997-06-01), Griffin et al.
patent: 5770925 (1998-06-01), Konopka et al.
patent: 5945788 (1999-08-01), Li et al.
patent: 5969483 (1999-10-01), Li et al.
patent: 5982106 (1999-11-01), Bobel
patent: 6127786 (2000-10-01), Moison
patent: 6169369 (2001-01-01), Nerone et al.
patent: 6211623 (2001-04-01), Wilhelm et al.
patent: 6232727 (2001-05-01), Chee et al.
patent: 6316887 (2001-11-01), Ribarich et al.
patent: 6366032 (2002-04-01), Allison et al.
patent: 6420838 (2002-07-01), Shackle
patent: 6501225 (2002-12-01), Konopka
patent: 6552494 (2003-04-01), Randazzo et al.
patent: 6914395 (2005-07-01), Yamauchi et al.
patent: 7015652 (2006-03-01), Shi
patent: 2002/0105283 (2002-08-01), Murakami et al.
patent: 2003/0025464 (2003-02-01), Konopka
European 0061730, Inui, Jun. 10, 1982.
European 0576991, Matsuzawa et al, May 1, 1994.
Blair David Anthony
Shackle Peter
Shi Ruhe
Patterson Mark J.
Tran Thuy Vinh
Universal Lighting Technologies, Inc.
Waddey & Patterson
LandOfFree
IC-based low cost reliable electronic ballast with multiple... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with IC-based low cost reliable electronic ballast with multiple..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and IC-based low cost reliable electronic ballast with multiple... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4004474