Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1991-02-07
1992-04-07
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315209R, 315DIG7, H05B 4136
Patent
active
051031418
ABSTRACT:
The invention relates to a switching arrangement for operating a high-pressure sodium lamp which radiates white light in stable operating conditions. The switching arrangement is provided with switching means for switching current through the lamp by means of a drive signal generated in a drive circuit, which signal is based on a comparison between a reference value C and drive signal V+.beta.I, in which V is the lamp voltage, I is the lamp current, and .beta. is a constant. According to the invention, C may be adjusted in steps in dependence on the lamp voltage. Thus the duration over which the lamp radiates white light can be prolonged and brought into better accordance with the electrical lamp life.
REFERENCES:
patent: 4039897 (1977-08-01), Dragoset
patent: 4455510 (1984-06-01), Lesko
patent: 4952846 (1990-08-01), Van Der Burgt et al.
Keijser Robertus A. J.
Weerdestein Petrus A. M.
LaRoche Eugene R.
Neyzari Ali
U.S. Philips Corporation
Wieghaus Brian J.
LandOfFree
Switching arrangement for increasing the white life of a high pr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Switching arrangement for increasing the white life of a high pr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switching arrangement for increasing the white life of a high pr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1897632