EP0082031A1 - Schaltung zur Helligkeitssteuerung einer mit Gleichstrom gespeicherten Fluoreszenzlampe - Google Patents

Schaltung zur Helligkeitssteuerung einer mit Gleichstrom gespeicherten Fluoreszenzlampe Download PDF

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Publication number
EP0082031A1
EP0082031A1 EP82402038A EP82402038A EP0082031A1 EP 0082031 A1 EP0082031 A1 EP 0082031A1 EP 82402038 A EP82402038 A EP 82402038A EP 82402038 A EP82402038 A EP 82402038A EP 0082031 A1 EP0082031 A1 EP 0082031A1
Authority
EP
European Patent Office
Prior art keywords
converter
voltage
signal
control member
ramp
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.)
Withdrawn
Application number
EP82402038A
Other languages
English (en)
French (fr)
Inventor
Raymond Max Brosillon
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.)
Safran Electrical and Power SAS
Precision Mecanique Labinal SA
Original Assignee
Labinal SA
Precision Mecanique Labinal SA
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 Labinal SA, Precision Mecanique Labinal SA filed Critical Labinal SA
Publication of EP0082031A1 publication Critical patent/EP0082031A1/de
Withdrawn legal-status Critical Current

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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
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • H05B41/3927—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations by pulse width modulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/04—Dimming circuit for fluorescent lamps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/07—Starting and control circuits for gas discharge lamp using transistors

Definitions

  • the present invention relates to a device for controlling the light intensity of a fluorescent tube supplied on a DC voltage, such as for example a fluorescent lighting tube of an aircraft, of an automobile or of a lamp. portable on battery.
  • the present invention therefore proposes to provide a device for controlling the light intensity of a fluorescent tube supplied with a DC voltage, which can adapt to all the needs of the user and to many different configurations of converters.
  • Another object of the invention is to provide such a device which can use simple control means, easy to develop, not very sensitive to parasites and non-disturbing.
  • Yet another objective of the invention is to provide such a device which, while being capable of adapting to many types of converters, retains an acceptable yield even at reduced speed, that is to say for the weak light intensity values.
  • Another objective, still of the invention, is to provide such a device which is simple and economical in construction.
  • the subject of the invention is a device for controlling the light intensity of a fluorescent tube supplied with a direct voltage via a converter, in which the duration of voltage pulses authorizing ignition is varied. of the tube, characterized in that it comprises a control member and means for generating a chopped signal with a chopping rate determined by said control member, said chopped signal being sent to a sensitive element of the converter to temporarily block and repetitively said converter at the rate of said chopped signal.
  • the blocking at variable duty cycle of the converter thus produced is carried out at low frequency, which facilitates adaptation to many types of converters and makes it possible to maintain an acceptable efficiency even at reduced speed.
  • Repetitive blocking of the converter causes a corresponding blocking of the fluorescent tube in a brief and repetitive manner, the variation in light intensity being thus without visual disturbance, without blinking and without stroboscopic effect.
  • control member is a member allowing the establishment of a continuous control voltage, for example a variable potentiometer.
  • This potentiometer can be supplied for example from the DC supply voltage of the network and has at least two positions, namely a position allowing operation at full power of the fluorescent tube and a position allowing only operation at power scaled down.
  • the device then advantageously comprises a ramp generator and a modulator mainly comprising a comparator one of the inputs of which receives the signal from the ramp generator while the said DC control voltage is displayed on its other input so as to generate a chopped signal of constant potential but whose chopping rate varies as a function of the value of the displayed control potential, the chopping rate being zero when this potential is equal to the peak potential of the ramp generator and becoming all the greater that this potential is diminished.
  • the chopped signal leaving the modulator is advantageously sent to a converter blocking circuit.
  • the latter may advantageously include a transistor, the base of which receives the chopped signal and which makes it possible, when thus made conductive, to ground a converter power transistor, for example a transistor of a converter power oscillator. .
  • the device includes a circuit stabilized by the continuous network to allow stable operation of the assembly over a wide range of variation of the network supply voltage.
  • control member can be designed so as not to address a voltage below a certain threshold so as not to block the converter beyond the limit allowing stable operation of the fluorescent tube .
  • the comparator 12 will emit a chopped signal whose chopping rate, that is to say the ratio of the zero potential duration of the signal to the total signal duration, i.e. the ramp period, will be 1/4.
  • This signal sent by the conductor 16 to the transistor 18 therefore blocks the converter at a frequency of 200 Hz for each time 3/4 of the period corresponding to this frequency.
  • the light intensity in the fluorescent tube will be about 1/4 of the maximum intensity.
  • control member intended to address a control potential of Uc can be controlled manually, or on the contrary controlled by any system. It can be constituted, very simply, by a three-position switch making it possible to display for example a zero potential, a potential greater than 100% of the top of the ramp and an intermediate potential, for example at 25%. It can also be constituted by a mechanically controlled potentiometer adjustable to discrete values or, on the contrary, continuously variable. It can also be constituted by an electronic circuit making it possible to address, according to a manual or automatic instruction, a determined potential Uc.
  • the other electronic means shown can also be replaced by equivalent means accessible to those skilled in the art.
  • the interface 17 will be structured as a function of the nature and characteristics of the converter which it must control, mlinterface 17 which can advantageously be constituted by an interchangeable or adjustable module.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
EP82402038A 1981-11-09 1982-11-05 Schaltung zur Helligkeitssteuerung einer mit Gleichstrom gespeicherten Fluoreszenzlampe Withdrawn EP0082031A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8120906 1981-11-09
FR8120906A FR2516335B1 (fr) 1981-11-09 1981-11-09 Dispositif de commande de l'intensite lumineuse d'un tube fluorescent alimente sur une tension continue

Publications (1)

Publication Number Publication Date
EP0082031A1 true EP0082031A1 (de) 1983-06-22

Family

ID=9263805

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82402038A Withdrawn EP0082031A1 (de) 1981-11-09 1982-11-05 Schaltung zur Helligkeitssteuerung einer mit Gleichstrom gespeicherten Fluoreszenzlampe

Country Status (3)

Country Link
US (1) US4529913A (de)
EP (1) EP0082031A1 (de)
FR (1) FR2516335B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661588A1 (fr) * 1990-04-28 1991-10-31 Koito Mfg Co Ltd Circuit d'eclairage pour lampe a decharge pour vehicules.
FR2778085A1 (fr) 1998-04-30 1999-11-05 Fred Zacouto Implant squelettique

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5402043A (en) * 1978-03-20 1995-03-28 Nilssen; Ole K. Controlled driven series-resonant ballast
JPS5834560A (ja) * 1981-08-21 1983-03-01 周　成祥 放電灯ディスプレイ装置
US4682080A (en) * 1984-08-17 1987-07-21 Hitachi, Ltd. Discharge lamp operating device
US4682083A (en) * 1984-10-29 1987-07-21 General Electric Company Fluorescent lamp dimming adaptor kit
US4691146A (en) * 1986-03-10 1987-09-01 Jacques Roux Method for forming special color effects from a fluorescent lamp which is supplied with electrical power and a device for carrying out the method
DE3722323A1 (de) * 1987-07-07 1989-01-19 Herfurth Gmbh Oszillator zum speisen einer gasentladungsstrecke
FR2635398B1 (fr) * 1988-08-09 1992-04-24 Thomson Csf Procede et dispositif d'eclairage arriere d'un ecran matriciel a cristal liquide
US5239293A (en) * 1988-08-09 1993-08-24 Thomson - Csf Method and device for the rear illumination of a liquid crystal matrix display panel
US5023518A (en) * 1988-12-12 1991-06-11 Joseph A. Urda Ballast circuit for gaseous discharge lamp
US5517089A (en) * 1993-10-28 1996-05-14 Abbott Laboratories Regulated electroluminescent panel power supply
US5990634A (en) * 1996-05-31 1999-11-23 Logic Laboratories, Inc. Dynamic range dimmer for gas discharge lamps
US5815067A (en) * 1997-05-19 1998-09-29 Thomas Lighting Single control wire device for HID dimming
US6570347B2 (en) 2000-06-01 2003-05-27 Everbrite, Inc. Gas-discharge lamp having brightness control

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000184A1 (en) * 1979-07-05 1981-01-22 J Swinea Dimmer circuit for fluorescent lamps
US4251752A (en) * 1979-05-07 1981-02-17 Synergetics, Inc. Solid state electronic ballast system for fluorescent lamps

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3890537A (en) * 1974-01-02 1975-06-17 Gen Electric Solid state chopper ballast for gaseous discharge lamps
US4039897A (en) * 1976-03-08 1977-08-02 Dragoset James E System for controlling power applied to a gas discharge lamp
US4277728A (en) * 1978-05-08 1981-07-07 Stevens Luminoptics Power supply for a high intensity discharge or fluorescent lamp
US4170747A (en) * 1978-09-22 1979-10-09 Esquire, Inc. Fixed frequency, variable duty cycle, square wave dimmer for high intensity gaseous discharge lamp
US4219760A (en) * 1979-03-22 1980-08-26 General Electric Company SEF Lamp dimming
US4346332A (en) * 1980-08-14 1982-08-24 General Electric Company Frequency shift inverter for variable power control
US4492899A (en) * 1981-08-18 1985-01-08 Indicator Controls Corporation Solid state regulated power supply system for cold cathode luminous tube

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251752A (en) * 1979-05-07 1981-02-17 Synergetics, Inc. Solid state electronic ballast system for fluorescent lamps
WO1981000184A1 (en) * 1979-07-05 1981-01-22 J Swinea Dimmer circuit for fluorescent lamps

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661588A1 (fr) * 1990-04-28 1991-10-31 Koito Mfg Co Ltd Circuit d'eclairage pour lampe a decharge pour vehicules.
FR2778085A1 (fr) 1998-04-30 1999-11-05 Fred Zacouto Implant squelettique

Also Published As

Publication number Publication date
FR2516335A1 (fr) 1983-05-13
US4529913A (en) 1985-07-16
FR2516335B1 (fr) 1985-06-07

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): DE GB

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Effective date: 19831212

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Effective date: 19880531

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Inventor name: BROSILLON, RAYMOND MAX