Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1989-09-22
1991-09-17
Laroche, Eugene R.
Electric lamp and discharge devices: systems
Current and/or voltage regulation
315307, 315308, 315224, 315DIG4, H05B 4100, H05B 3700
Patent
active
050497901
ABSTRACT:
A method and apparatus for operating at least one gas discharge lamp includes supplying a gas discharge lamp with high-frequency alternating voltage from an externally controlled lamp generator having an operating frequency being variable for dimming the gas discharge lamp. The state of the gas discharge lamp is monitored. A preheating phase with an ensuing starting phase are provided for firing the gas discharge lamp. The operating frequency of the lamp generator during the preheating phase is adjusted to be greater than a rated frequency in rated operation. The operating frequency at the beginning of the starting phase is reduced until the gas discharge lamp has attained a predetermined state and the operating frequency is subsequently maintained at least at an instantaneous value thereof until the gas discharge lamp fires. The operating frequency at the end of the starting phase is reduced to the rated frequency, thereby initiating rated operation. The operating frequency is varied for dimming in an ensuing dimming operation.
REFERENCES:
patent: 3999100 (1976-12-01), Dendy et al.
patent: 4338565 (1982-06-01), Rividi
patent: 4346332 (1982-08-01), Walden
patent: 4392086 (1983-07-01), Ide et al.
patent: 4663566 (1987-05-01), Nagano
patent: 4704563 (1987-11-01), Hussey
patent: 4717863 (1988-01-01), Zeiler
patent: 4791338 (1988-12-01), Dean et al.
patent: 4870566 (1989-09-01), Jorgensen
patent: 4958108 (1990-09-01), Jorgensen
Siemens Components 22 (1984), Book 6, pp. 249-254, DE-OS 33 01 108; DE-OS 35 11 661.
Herfurth Michael
Soeylemez Ali-Ihsan
Dinh Son
Greenberg Laurence A.
LaRoche Eugene R.
Lerner Herbert L.
Siemens Aktiengesellschaft
LandOfFree
Method and apparatus for operating at least one gas discharge la does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for operating at least one gas discharge la, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for operating at least one gas discharge la will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1919065