Limited open circuit voltage ballast

Details Limited open circuit voltage ballast Limited open circuit voltage ballast

2007-07-03

2007-07-03

Tran, Thuy V. (Department: 2821)

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Transformer in the supply circuit

C315S278000, C315S312000

Reexamination Certificate

active

10557976

ABSTRACT:
A lighting system employs a pair of ballast input stages (21) operable to oscillate at different oscillating frequency (f1,f2) upon an initial powering of the ballast input stages (21). The lighting system further employs a pair of ballast output stages (23) for establishing an open circuit voltage across the ballast output stages (23) in response to an absence of a loading of lamps (10) across the ballast output stages (23). The light system further employ means for, subsequent to the initial powering of the ballast input stages (21) and in response to the absence of the loading of the lamps (10) across the ballast output stages (23), impending any parasitic loading across the ballast output stages (23) from phase locking the oscillating frequencies (f1, f2).

REFERENCES:
patent: 4819146 (1989-04-01), Nilssen
patent: 4902942 (1990-02-01), El-Hamamsy
patent: 5115347 (1992-05-01), Nilssen
patent: 5117158 (1992-05-01), Arbel
patent: 5216332 (1993-06-01), Nilssen
patent: 5270618 (1993-12-01), Nilssen
patent: 5512801 (1996-04-01), Nilssen
patent: 5925990 (1999-07-01), Crouse et al.
patent: 6072282 (2000-06-01), Adamson
patent: 6121733 (2000-09-01), Nilssen
patent: 6181085 (2001-01-01), Nilssen
patent: 6194840 (2001-02-01), Chang
patent: 2003/0057866 (2003-03-01), Takahashi et al.
patent: 2003/0155873 (2003-08-01), O'Meara

Affiliated with

Also associated with

Rating

Limited open circuit voltage ballast does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Limited open circuit voltage ballast, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Limited open circuit voltage ballast will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3751122