EP0471331B1 - Assemblage de circuit pour le fonctionnement d'une lampe fluorescente - Google Patents

Assemblage de circuit pour le fonctionnement d'une lampe fluorescente Download PDF

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Publication number
EP0471331B1
EP0471331B1 EP91113562A EP91113562A EP0471331B1 EP 0471331 B1 EP0471331 B1 EP 0471331B1 EP 91113562 A EP91113562 A EP 91113562A EP 91113562 A EP91113562 A EP 91113562A EP 0471331 B1 EP0471331 B1 EP 0471331B1
Authority
EP
European Patent Office
Prior art keywords
fluorescent lamp
switch
ignition
brightness
lamp
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 - Lifetime
Application number
EP91113562A
Other languages
German (de)
English (en)
Other versions
EP0471331A1 (fr
Inventor
Gottfried Stockinger
Jürgen Ludwig
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.)
Diehl Verwaltungs Stiftung
Original Assignee
Diehl GmbH and Co
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 Diehl GmbH and Co filed Critical Diehl GmbH and Co
Publication of EP0471331A1 publication Critical patent/EP0471331A1/fr
Application granted granted Critical
Publication of EP0471331B1 publication Critical patent/EP0471331B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H05B41/16—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/20—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
    • H05B41/23—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode
    • H05B41/232—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps
    • H05B41/2325—Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps not having an auxiliary starting electrode for low-pressure lamps provided with pre-heating electrodes
    • 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

Definitions

  • the invention relates to a circuit arrangement for starting and controlling the brightness of a fluorescent lamp in operation according to the preamble of claim 1.
  • DE 30 25 249 A1 discloses a generic circuit arrangement.
  • a shunt branch which has a controllable electrical valve in the form of a triac.
  • One of the electrodes of the fluorescent lamp is grounded via a current measuring resistor.
  • a zero crossing of the lamp current generates a certain voltage drop across this current measuring resistor, which causes a short zero crossing signal to be generated in a pulse generator.
  • a control pulse generator is operatively connected to the pulse generator, which applies the ignition pulses to the electrodes of the fluorescent lamp. Since a lamp current at the current measuring resistor does not cause a voltage drop before the start-up, so that the circuit is not yet working, the signals which excite the pulse generator are applied by an ignition pulse generator.
  • DE 36 13 876 A1 discloses an electronic starting device for preheating and igniting fluorescent lamps operated with ac voltage.
  • an ignition circuit has an inductance and a controllable semiconductor switch which acts as an electronic switch with a purely time specification.
  • the solution features ensure that fluctuations in the voltage and / or the frequency of the network cannot affect the lighting. This is particularly important in the case of aircraft, since such fluctuations can occur in certain situations and the passengers should not be disturbed by fluctuations in the brightness of the lighting.
  • a switch for switching off the fluorescent lamp and a control circuit are provided in the circuit arrangement, which monitors the ignition attempts and the lighting of the fluorescent lamp and which after a certain number of ignition attempts or after a specific time after the first attempt to ignite, the switch opens if the fluorescent lamp has not ignited after these attempts to ignite.
  • a fluorescent lamp (1) has a fluorescent tube (2) with two lamp electrodes (3, 4).
  • the lamp electrodes (3, 4) are connected to an AC voltage source (6), in particular an aircraft electrical system, via a passive or active ballast (5).
  • the ballast (5) is a choke. Alternatively, it can also be an adjustable throttle.
  • the poles of the lamp electrodes (3, 4) facing away from the AC voltage source (6) are connected to one another via a switch (7). This can be controlled by a control circuit (8).
  • the control circuit (8) enables brightness control of the fluorescent lamp (1) (dimming operation) in a manner known per se.
  • the control circuit (8) has a phase shifter (9) for this purpose. For example, it opens the switch (7) more or less out of phase with respect to the zero crossing in each half-wave of the AC line voltage. Opening the switch (7) generates an ignition pulse that ignites the fluorescent tube (2).
  • FIG. 3 shows a time diagram of the current flowing through the ballast (5).
  • the switching times at which the switch (7) is switched are designated t1 and t2.
  • the switch (7) is opened at times t1.
  • the switching times t1 are therefore the ignition times.
  • the switch (7) is closed at the times t2.
  • the switching times t2 are therefore the deletion times.
  • the lamp brightness depends on the current-time area between the switching points t1 and t2.
  • the brightness control or brightness regulation can accordingly be carried out by shifting the ignition times t1 and / or shifting the extinguishing times t2 (cf. FIG. 3).
  • a measuring element (10) is connected to the control circuit (8). This detects deviations in the mains frequency and / or the mains voltage and accordingly shifts the switching times t1 or t2 of the control circuit (8). This compensates for annoying fluctuations in brightness.
  • additional heating current circuits (11, 12) are provided for the lamp electrodes (3, 4) and are connected to the AC voltage source (6) bypassing the ballast (5).
  • the measuring element (10) is an ammeter which measures the current flowing through the ballast (5). Since the lamp brightness depends on the current time area between the switching times t1 and t2 and the control circuit (8) generates it, the brightness can be readjusted. Deviations in the mains frequency and / or the mains voltage lead to a change in the current flowing through the ballast (5), which in itself would lead to a change in the brightness. This effect can be corrected by shifting the switching times t1 and / or t2.
  • an additional switch (14) is provided, with which flickering, that is to say used-up, fluorescent lamps can be switched off.
  • the switch (14) is switched by the control circuit (8).
  • the measuring element (10) formed by an ammeter measures the current each time the switch (7) is opened, that is to say after the ignition pulse. If a current flows, this is a sign that the fluorescent lamp (1) has been lit. The switch (14) remains closed. If, on the other hand, no current is flowing, this is a sign that the ignition pulse has not led to the ignition of the fluorescent lamp (1). If the fluorescent lamp (1) is not ignited after one or more ignition pulses, the control circuit (8) opens the switch (14), whereby the fluorescent lamp (1) is forcibly switched off.

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)

Claims (2)

  1. Circuit de montage pour la mise en marche et le réglage de la luminosité d'une lampe à substance luminescente (1) fonctionnant dans un réseau à courant alternatif, par exemple le réseau de bord d'un avion, comportant une bobine (5) montée en amont de la lampe à substance luminescente (1), un organe de mesure (10) prévu dans le circuit d'entrée et un interrupteur (7), qui est situé entre deux électrodes de lampe et peut être commandé périodiquement, au moyen d'un circuit de commande (8) à des instants d'enclenchement, caractérisé en ce que lors de la mise en marche, le circuit de commande (8) contrôle les essais d'allumage et l'allumage de la lampe à substance luminescente (1) et ouvre un interrupteur (14), monté dans une ligne d'arrivée du réseau, lorsque la lampe (1) ne s'est pas allumée après un certain nombre d'essais d'allumage, ou une durée déterminée après le premier essai d'allumage, et en ce que l'organe de mesure (10) est un ampèremètre qui mesure l'intensité du courant et qui pendant le fonctionnement déplace les instants d'enclenchement du circuit de commande (8), pour compenser les variations visibles de la luminosité.
  2. Circuit de montage selon la revendication 1, caractérisé en ce que l'organe de mesure (10) mesure le courant s'écoulant, après des essais d'allumage, à travers la lampe à substance luminescente (1) ou la chute de tension sur la lampe (1), après des essais d'allumage.
EP91113562A 1990-08-16 1991-08-13 Assemblage de circuit pour le fonctionnement d'une lampe fluorescente Expired - Lifetime EP0471331B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4025939 1990-08-16
DE4025939A DE4025939C2 (de) 1990-08-16 1990-08-16 Schaltungsanordnung für das Starten und die Helligkeitssteuerung einer Leuchtstofflampe im Betrieb

Publications (2)

Publication Number Publication Date
EP0471331A1 EP0471331A1 (fr) 1992-02-19
EP0471331B1 true EP0471331B1 (fr) 1995-02-01

Family

ID=6412347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91113562A Expired - Lifetime EP0471331B1 (fr) 1990-08-16 1991-08-13 Assemblage de circuit pour le fonctionnement d'une lampe fluorescente

Country Status (2)

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EP (1) EP0471331B1 (fr)
DE (2) DE4025939C2 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4328306A1 (de) * 1993-08-23 1994-03-17 Spindler Bernhard Dipl Ing Schaltungsanordnung zur Einstellung und Regelung des Betriebszustandes von Niederdruckentladungslampen im Hochfrequenz- und Niederfrequenzbetrieb
DE9402631U1 (de) * 1994-02-17 1995-06-22 Trilux-Lenze Gmbh + Co Kg, 59759 Arnsberg Leuchtstofflampen-Vorschaltgerät
US5955847A (en) * 1994-06-10 1999-09-21 Beacon Light Products, Inc. Method for dimming a fluorescent lamp
US5652481A (en) * 1994-06-10 1997-07-29 Beacon Light Products, Inc. Automatic state tranition controller for a fluorescent lamp
DE4428423A1 (de) * 1994-08-11 1996-02-15 Diehl Gmbh & Co Verfahren zur Erfassung und Anzeige des Flackerns im Licht und Vorrichtung zur Durchführung des Verfahrens
WO1997011586A1 (fr) * 1995-09-19 1997-03-27 Beacon Light Products, Inc. Procede de regulation du courant traversant une lampe fluorescente base sur l'excitation par impulsions d'une alimentation de commande
US5736817A (en) * 1995-09-19 1998-04-07 Beacon Light Products, Inc. Preheating and starting circuit and method for a fluorescent lamp
US5631523A (en) * 1995-09-19 1997-05-20 Beacon Light Products, Inc. Method of regulating lamp current through a fluorescent lamp by pulse energizing a driving supply
DE19625077B4 (de) * 1996-06-22 2005-05-19 Diehl Stiftung & Co. Kg Leuchtstofflampen-Vorschaltgerät
DE19943256A1 (de) * 1999-09-10 2001-03-15 Hella Kg Hueck & Co Vorrichtung und Verfahren zur Ansteuerung einer Lichteinheit für Fahrzeuge

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025249A1 (de) * 1980-07-03 1982-01-28 Helmut Ulrich Apparatebau, 8000 München Schaltung zur helligkeitssteurung von leuchtstofflampen

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1932931A1 (de) * 1968-04-06 1971-01-07 Stotz Kontakt Gmbh Anordnung zur Helligkeitssteuerung einer Leuchtstofflampe
US3599037A (en) * 1969-05-01 1971-08-10 Xerox Corp Gaslamp lead ballast circuit having feedback control
DE2115293A1 (de) * 1971-03-30 1972-10-12 Schulz J Bimetallschalter für Leuchtstofflampen
CH595036A5 (en) * 1975-05-30 1978-01-31 Novelectric Ag Fluorescent lamp control circuit
FI78212C (fi) * 1982-12-10 1989-06-12 Siemens Ag Anordning foer styrning av ljusintensitet hos laogtrycksurladdningslampor.
DE3327189A1 (de) * 1983-07-28 1985-02-07 Diehl GmbH & Co, 8500 Nürnberg Schaltungsanordnung fuer das zuenden und fuer die helligkeitssteuerung von leuchtstofflampen
DE3343930A1 (de) * 1983-12-05 1985-06-13 Horst 2741 Kutenholz Erzmoneit Schaltungsanordnung zum betrieb von leuchtstoff- oder ultraviolett-niederspannungs-entladungslampen
GB8520105D0 (en) * 1985-08-09 1985-09-18 Parker Graphics Ltd Electric control circuit
DE3613876A1 (de) * 1986-04-24 1987-10-29 Thomas Bilger Elektronische start- und schutzvorrichtung zum vorheizen und zuenden von mit netzwechselspannung betriebenen leuchtstofflampen
DE3710275A1 (de) * 1987-03-28 1988-10-06 Ceag Licht & Strom Anordnung zum starten und betrieb einer leuchtstofflampe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3025249A1 (de) * 1980-07-03 1982-01-28 Helmut Ulrich Apparatebau, 8000 München Schaltung zur helligkeitssteurung von leuchtstofflampen

Also Published As

Publication number Publication date
DE59104466D1 (de) 1995-03-16
EP0471331A1 (fr) 1992-02-19
DE4025939C2 (de) 1994-03-24
DE4025939A1 (de) 1992-02-20

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