Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1995-06-06
1998-10-13
Pascal, Robert
Electric lamp and discharge devices: systems
Current and/or voltage regulation
315224, 315DIG4, H05B 3702
Patent
active
058216995
ABSTRACT:
An improved ballast circuit for use with a compact fluorescent lamp includes an EMI filter, a rectifier and a voltage amplification stage, an active resonant circuit, a dimming circuit, and a power factor correction stage which is connected in parallel to a lamp load. In one embodiment, the ballast circuit operates in cooperation with a three way switch to adjust the light output of the lamp to three discrete levels corresponding to each setting of the three way switch. In another embodiment the ballast circuit includes a feedback capacitor which provides a feedback path for a portion of the high frequency current to the rectifier and voltage amplification stage. In still another embodiment, the ballast circuit is configured to accept input from a triac or a SCR device. In all of the embodiments, the dimming circuit works with the active resonant circuit to vary the amount of power that is supplied to the lamp load. Further, the ballast circuit embodiments automatically limit the voltage buildup in the lamp filaments at the end of their lifetime to prevent catastrophic failure of fluorescent and compact fluorescent lamps.
REFERENCES:
patent: 2505112 (1950-07-01), Hallman
patent: 2966602 (1960-12-01), Waymouth et al.
patent: 3112890 (1963-12-01), Snelling
patent: 3507259 (1970-04-01), Dotto
patent: 3569817 (1971-03-01), Boehringer
patent: 3611021 (1971-10-01), Wallace
patent: 3736496 (1973-05-01), Lachocki
patent: 3882356 (1975-05-01), Stehlin
patent: 3913000 (1975-10-01), Cardwell, Jr.
patent: 3974418 (1976-08-01), Fridrich
patent: 4005334 (1977-01-01), Andrews
patent: 4016451 (1977-04-01), Engel
patent: 4053813 (1977-10-01), Cornrumpf et al.
patent: 4125767 (1978-11-01), Silver
patent: 4127795 (1978-11-01), Knoll
patent: 4127798 (1978-11-01), Anderson
patent: 4135116 (1979-01-01), Smith
patent: 4160288 (1979-07-01), Stuart et al.
patent: 4168453 (1979-09-01), Gerhard et al.
patent: 4230971 (1980-10-01), Gerhard et al.
patent: 4237403 (1980-12-01), Davis
patent: 4245285 (1981-01-01), Weiss
patent: 4284925 (1981-08-01), Bessone et al.
patent: 4348615 (1982-09-01), Garrison et al.
patent: 4350891 (1982-09-01), Wuerflein
patent: 4353009 (1982-10-01), Knoll
patent: 4370600 (1983-01-01), Zansky
patent: 4379254 (1983-04-01), Hurban
patent: 4388563 (1983-06-01), Hyltin
patent: 4392087 (1983-07-01), Zansky
patent: 4393323 (1983-07-01), Huebner
patent: 4395660 (1983-07-01), Waszkiewicz
patent: 4399391 (1983-08-01), Hammer et al.
patent: 4423348 (1983-12-01), Greiler
patent: 4443740 (1984-04-01), Goralnik
patent: 4481460 (1984-11-01), Kroning et al.
patent: 4510400 (1985-04-01), Kitely
patent: 4523131 (1985-06-01), Zansky
patent: 4533986 (1985-08-01), Jones
patent: 4544863 (1985-10-01), Hashimoto
patent: 4547706 (1985-10-01), Krummel
patent: 4562383 (1985-12-01), Kerscher et al.
patent: 4580080 (1986-04-01), Smith
patent: 4612479 (1986-09-01), Zansky
patent: 4613934 (1986-09-01), Pacholok
patent: 4616158 (1986-10-01), Krummel et al.
patent: 4620271 (1986-10-01), Musil
patent: 4626746 (1986-12-01), Zaderej
patent: 4631450 (1986-12-01), Lagree et al.
patent: 4641061 (1987-02-01), Munson
patent: 4647817 (1987-03-01), Fahnrich et al.
patent: 4651060 (1987-03-01), Clark
patent: 4677345 (1987-06-01), Nilssen
patent: 4682083 (1987-07-01), Alley
patent: 4683402 (1987-07-01), Aubrey
patent: 4700113 (1987-10-01), Stupp et al.
patent: 4730147 (1988-03-01), Kroening
patent: 4739227 (1988-04-01), Anderson
patent: 4742535 (1988-05-01), Hino et al.
patent: 4743835 (1988-05-01), Bosse et al.
patent: 4857806 (1989-08-01), Nilssen
patent: 4859914 (1989-08-01), Summa
patent: 4864482 (1989-09-01), Quazi et al.
patent: 4894587 (1990-01-01), Jungreis et al.
patent: 4933605 (1990-06-01), Quazi et al.
patent: 4943886 (1990-07-01), Quazi et al.
patent: 4949020 (1990-08-01), Warren et al.
patent: 4950963 (1990-08-01), Sievers
patent: 4954768 (1990-09-01), Luchaco et al.
patent: 4963795 (1990-10-01), Nilssen
patent: 4988921 (1991-01-01), Ratner et al.
patent: 4996462 (1991-02-01), Krummel
patent: 4999547 (1991-03-01), Ottenstein
patent: 5001386 (1991-03-01), Sullivan et al.
patent: 5003230 (1991-03-01), Wong et al.
patent: 5004959 (1991-04-01), Nilssen
patent: 5004997 (1991-04-01), Roth
patent: 5039914 (1991-08-01), Szuba
patent: 5041763 (1991-08-01), Sullivan et al.
patent: 5083081 (1992-01-01), Barrault et al.
patent: 5084653 (1992-01-01), Nilssen
patent: 5089751 (1992-02-01), Wong et al.
patent: 5097181 (1992-03-01), Kakitani
patent: 5101142 (1992-03-01), Chatfield
patent: 5172033 (1992-12-01), Smits
patent: 5172034 (1992-12-01), Brinkerhoff
patent: 5173643 (1992-12-01), Sullivan et al.
patent: 5174646 (1992-12-01), Siminovitch et al.
patent: 5175477 (1992-12-01), Grissom
patent: 5185560 (1993-02-01), Nilssen
patent: 5192896 (1993-03-01), Qin
patent: 5194782 (1993-03-01), Richardson et al.
patent: 5198726 (1993-03-01), Van Meurs et al.
patent: 5214356 (1993-05-01), Nilssen
patent: 5233270 (1993-08-01), Nilssen
patent: 5237243 (1993-08-01), Chung
patent: 5245253 (1993-09-01), Quazi
patent: 5289079 (1994-02-01), Wittmann
patent: 5289083 (1994-02-01), Quazi
patent: 5296783 (1994-03-01), Fischer
patent: 5309062 (1994-05-01), Perkins et al.
patent: 5313142 (1994-05-01), Wong
patent: 5321337 (1994-06-01), Hsu
patent: 5331253 (1994-07-01), Counts
patent: 5341067 (1994-08-01), Nilssen
patent: 5394064 (1995-02-01), Ranganath et al.
patent: 5396154 (1995-03-01), Shiy et al.
patent: 5396155 (1995-03-01), Bezdon et al.
patent: 5404082 (1995-04-01), Hernandez et al.
Kroning, et al., "New Electronic Control Gear," Siemens Power Engineering & Automation VII, No. 2, pp. 102-104, 1985.
Hayt, et al., Engineering Circuit Analysis, 3d ed., pp. 296-297, 1978.
OSRAM DELUX.RTM. compact fluorescent lamps, "Economical long-life lighting--with extra convenience of electronic control gear", pp. 1-15.
Philips Lighting, "Lamp specification and application guide", pp. 1, 11, 61-64, 78.
Pacific Scientific
Pascal Robert
Shingleton Michael
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