GB897828A - A fluorescent lamp operating circuit - Google Patents

A fluorescent lamp operating circuit

Info

Publication number
GB897828A
GB897828A GB425959A GB425959A GB897828A GB 897828 A GB897828 A GB 897828A GB 425959 A GB425959 A GB 425959A GB 425959 A GB425959 A GB 425959A GB 897828 A GB897828 A GB 897828A
Authority
GB
United Kingdom
Prior art keywords
lamp
transistor
transformer
fluorescent lamp
feb
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB425959A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB897828A publication Critical patent/GB897828A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/391—Controlling the intensity of light continuously using saturable magnetic devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously

Abstract

897,828. Supply circuits for space-discharge lamps. LICENTIA PATENT - VERWALTUNGS-G.m.b.H. Feb. 6, 1959 [Feb. 21, 1958], No. 4259/59. Class 38 (4). A fluorescent lamp is provided with a resistive ballast in the form of a controllable transistor. A fluorescent lamp 16 is supplied from a D.C. source UN by way of an oscillator 1, which produces alternating current having a rectangular waveform, the alternating current being fed from the oscillator output transformer 1a to a transformer 3, which feeds the lamp 16, over half-wave discriminating devices 2a, 2b, the connection between the centre taps on the transformer windings containing a transistor 4. By means of a further transistor 9 and voltage dividers 5, 6 and 7, 8, the transistor 4 is controlled to function as a resistive ballast for the lamp 16. The lamp has filamentary electrodes which are heated by means of a transformer 10, a transistor 12 being supplied to prevent heating current being developed after the lamp has ignited.
GB425959A 1958-02-21 1959-02-06 A fluorescent lamp operating circuit Expired GB897828A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL29737A DE1061438B (en) 1958-02-21 1958-02-21 Operating arrangement for preheating and current limitation of fluorescent lamps

Publications (1)

Publication Number Publication Date
GB897828A true GB897828A (en) 1962-05-30

Family

ID=7264982

Family Applications (1)

Application Number Title Priority Date Filing Date
GB425959A Expired GB897828A (en) 1958-02-21 1959-02-06 A fluorescent lamp operating circuit

Country Status (3)

Country Link
BE (1) BE575272A (en)
DE (1) DE1061438B (en)
GB (1) GB897828A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3249799A (en) * 1962-07-23 1966-05-03 Gen Electric Systems and apparatus for operating electric discharge devices
DE2748441A1 (en) * 1977-10-26 1979-05-03 Licentia Gmbh Fluorescent lamp transistor inverter - uses triac controlled by state on ignition capacitor connected to secondary winding
GB2151090A (en) * 1983-12-08 1985-07-10 Min Yung Shyu Electronic ballast

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1126031B (en) * 1960-12-28 1962-03-22 Licentia Gmbh Circuit arrangement for low-voltage fluorescent lamps that are fed from a vehicle battery or a similar direct voltage source
DE1232654B (en) * 1965-02-23 1967-01-19 Wetron Weida Betrieb Komb Circuit arrangement for lamp current and luminous flux stabilization of fluorescent lamps operated on transistor inverters

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1144267A (en) * 1955-01-08 1957-10-11 Siemens Ag Electric lighting installation
FR1123405A (en) * 1955-03-11 1956-09-21 Csf Power supply device for fluorescent tubes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3249799A (en) * 1962-07-23 1966-05-03 Gen Electric Systems and apparatus for operating electric discharge devices
DE2748441A1 (en) * 1977-10-26 1979-05-03 Licentia Gmbh Fluorescent lamp transistor inverter - uses triac controlled by state on ignition capacitor connected to secondary winding
GB2151090A (en) * 1983-12-08 1985-07-10 Min Yung Shyu Electronic ballast

Also Published As

Publication number Publication date
BE575272A (en) 1959-05-15
DE1061438B (en) 1959-07-16

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