Frequency controlled quick and soft start gas discharge lamp bal

Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Transformer in the supply circuit

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

315247, 315291, H05B 4116

Patent

active

060722827

ABSTRACT:
A gentle start electronic ballast operates one or more gas discharge lamps in a dimming or non-dimming mode. The ballast has a power supply section and a frequency-dependent control section. A power supply section includes a rectifier circuit, a power boosting circuit, a power factor compensation chip for the ballast, a control circuit to insure startup of the power factor compensation chip on the first haversine produced by the rectifier circuit and an in-rush current limiter that is removed from the operational circuit path of the ballast by the control circuit once the power factor compensation chip is rendered self-sustaining by the power boosting circuit. The control section receives power from the power supply section creating a reference voltage that is applied to a voltage controlled oscillator to develop an output signal the frequency of which varies from an initial high value to a lower operating value through a range that corresponds with the permissible range of power to be applied to the lamps and separately to their filaments as determined by the values of elements employed in a frequency adjustment circuit that is coupled to the oscillator. The output oscillator's signal is thereafter applied to a current limiting, shunted transformer having an air gap and turns ratio that is selected in accordance with the load profile and operating characteristics of the gas discharge lamps to ultimately apply power to the lamps as a function of the frequency of the signal applied to the transformer.

REFERENCES:
patent: Re33057 (1989-09-01), Clegg et al.
patent: 3919595 (1975-11-01), Willis, Jr.
patent: 4100476 (1978-07-01), Ghiringhelli
patent: 4134044 (1979-01-01), Holmes
patent: 4144447 (1979-03-01), Eaton
patent: 4187450 (1980-02-01), Chen
patent: 4414491 (1983-11-01), Elliot
patent: 4453109 (1984-06-01), Stupp et al.
patent: 4484108 (1984-11-01), Stupp et al.
patent: 4630005 (1986-12-01), Clegg et al.
patent: 4751398 (1988-06-01), Ertz, III
patent: 4774649 (1988-09-01), Archer
patent: 4888527 (1989-12-01), Linberg
patent: 5047696 (1991-09-01), Nilssen
patent: 5192896 (1993-03-01), Qin
patent: 5371440 (1994-12-01), Liu et al.
patent: 5381077 (1995-01-01), McGuire
patent: 5416387 (1995-05-01), Cuk et al.
patent: 5461287 (1995-10-01), Russell et al.
patent: 5469027 (1995-11-01), Uchihashi et al.
patent: 5471118 (1995-11-01), Nilssen
patent: 5517086 (1996-05-01), El-Hamamsy et al.
patent: 5519289 (1996-05-01), Katyl et al.
patent: 5539281 (1996-07-01), Shackle et al.
patent: 5648702 (1997-07-01), Choi et al.
patent: 5850127 (1998-12-01), Zhu et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Frequency controlled quick and soft start gas discharge lamp bal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Frequency controlled quick and soft start gas discharge lamp bal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency controlled quick and soft start gas discharge lamp bal will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2216149

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.