Active lamp current crest factor control

Details Active lamp current crest factor control Active lamp current crest factor control

2011-07-19

2011-07-19

Owens, Douglas W (Department: 2821)

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Periodic switch cut-out

C315S307000, C315S360000

Reexamination Certificate

active

07982406

ABSTRACT:
Ballasts with crest factor control are provided. During a transition to a given half cycle steady state, the current provided to reach the steady state is varied, such as turned off for a short period. This reduction during the transition may reduce or eliminate overshoot. The crest factor control is active, such as altering the timing or number of on/off/on switchings used to control crest factor. The active control may be based on any information, such as time, lamp voltage feedback, or other lamp dependent feedback.

REFERENCES:
patent: 5063331 (1991-11-01), Nostwick
patent: 5914572 (1999-06-01), Qian et al.
patent: 6144172 (2000-11-01), Sun
patent: 6188183 (2001-02-01), Greenwood et al.
patent: 6384544 (2002-05-01), Greenwood et al.
patent: 6495971 (2002-12-01), Greenwood et al.
patent: 6593703 (2003-07-01), Sun
patent: 6791285 (2004-09-01), Greenwood et al.
patent: 6936976 (2005-08-01), Rudolph
patent: 7141937 (2006-11-01), Kumagai et al.
patent: 7411360 (2008-08-01), Henry
patent: 2004/0032223 (2004-02-01), Henry
patent: 2006/0097652 (2006-05-01), Van Casteren et al.
patent: 2006/0186831 (2006-08-01), Newman et al.
patent: 2007/0273304 (2007-11-01), Greenwood et al.

Affiliated with

Also associated with

Rating

Active lamp current crest factor control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Active lamp current crest factor control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Active lamp current crest factor control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2691988