EP0471331A1 - 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
EP0471331A1
EP0471331A1 EP91113562A EP91113562A EP0471331A1 EP 0471331 A1 EP0471331 A1 EP 0471331A1 EP 91113562 A EP91113562 A EP 91113562A EP 91113562 A EP91113562 A EP 91113562A EP 0471331 A1 EP0471331 A1 EP 0471331A1
Authority
EP
European Patent Office
Prior art keywords
brightness
fluorescent lamp
control circuit
switch
circuit arrangement
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.)
Granted
Application number
EP91113562A
Other languages
German (de)
English (en)
Other versions
EP0471331B1 (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 operating a fluorescent lamp on an AC network, for example an aircraft electrical system.
  • the object of the invention is to propose a circuit arrangement of the type mentioned, which avoids unwanted, visible fluctuations in brightness.
  • the above object is achieved in a circuit arrangement of the aforementioned type with a switch located between two lamp electrodes, which can be switched by means of a control circuit which periodically switches the switch at brightness-shifted switching times for brightness control, in that a measuring element is connected to the control circuit, which depending on deviations in the mains frequency and / or the mains voltage and / or the brightness of setpoints, the switching times of the control circuit are shifted in such a way that brightness fluctuations in the visible range are compensated for.
  • Another circuit arrangement according to the invention of the type mentioned at the outset with a choke connected upstream of the fluorescent lamp is characterized in that the inductance of the choke is adjustable and that a regulator is provided for setting the inductance, which uses a measuring element to deviate from the mains frequency and / or the mains voltage and / or the brightness of setpoints and adjusts the inductance to compensate for visible fluctuations in brightness.
  • a circuit arrangement of the type mentioned a switch for switching off the fluorescent lamp and a control circuit is provided which monitors the ignition attempts and the lighting of the fluorescent lamp and which opens the switch after a certain number of ignition attempts, or after a certain time after the first ignition attempt, if the fluorescent lamp has not ignited after these ignition attempts.
  • This circuit arrangement alone solves the problem.
  • This circuit arrangement can also be used in conjunction with one of the circuit arrangements mentioned above. This circuit arrangement ensures that a used fluorescent lamp is switched off automatically after a few start attempts without the other fluorescent lamps of the lighting being affected.
  • 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.
  • the ballast (5) is an adjustable choke.
  • 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 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) creates 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.
  • At times t2 the switch (7) is closed.
  • the switching times t2 are therefore the deletion times.
  • the lamp brightness depends on the current-time area between the switching times 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 network frequency and / or the network voltage and accordingly shifts the switching times t1 or t2 of the control circuit (8). This compensates for annoying fluctuations in brightness.
  • the measuring element (10) can also be formed by a brightness sensor which detects the brightness of the fluorescent lamp (1). In the event of fluctuations in the brightness, it shifts the switching times of the control circuit (8) so that the brightness remains constant. There is a brightness control.
  • additional heating circuits are provided for the lamp electrodes (3, 4) and are connected to the AC voltage source (6) bypassing the ballast (5).
  • the adjustable throttle (5) is connected to a controller (13). This is connected to the measuring element (10) and the AC voltage source (6).
  • the controller (13) detects deviations in the mains frequency and / or the mains voltage and / or the brightness. It adjusts the inductance of the choke (5) so that the choke current compensates for the brightness fluctuations.
  • the measuring element (10) is, for example, 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.
  • a voltage meter is provided as the measuring element (10), which detects the voltage between the lamp electrodes (3, 4) on the mains side. If the switch (7) is open and the fluorescent lamp (1) still does not light up, the voltage measured by the measuring element (10) deviates from the voltage which arises when the fluorescent lamp (1) shines. This is a sign that the fluorescent lamp (1) has not ignited despite one or more ignition attempts. The control circuit (8) then opens the switch (14).
  • a brightness sensor (15) is provided, which is connected to the control circuit (8). If the fluorescent lamp (1) does not light up despite one or more ignition attempts, then the switch (14) is opened again by the control circuit (8).

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
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
DE4025939A DE4025939C2 (de) 1990-08-16 1990-08-16 Schaltungsanordnung für das Starten und die Helligkeitssteuerung einer Leuchtstofflampe im Betrieb
DE4025939 1990-08-16

Publications (2)

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

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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997011580A1 (fr) * 1995-09-19 1997-03-27 Beacon Light Products, Inc. Circuit de prechauffage et d'amorçage pour lampe fluorescente et procede associe
WO1997011585A1 (fr) * 1995-09-19 1997-03-27 Beacon Light Products, Inc. Circuit resonnant de regulation, d'amorçage et de multiplication de la tension destine a une lampe fluorescente
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
US5652481A (en) * 1994-06-10 1997-07-29 Beacon Light Products, Inc. Automatic state tranition controller for a fluorescent lamp
US5955847A (en) * 1994-06-10 1999-09-21 Beacon Light Products, Inc. Method for dimming a fluorescent lamp

Families Citing this family (5)

* 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
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
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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2417594A1 (de) * 1973-04-13 1974-11-07 Matsushita Electric Works Ltd Flimmerfreie gasentladungslampenanordnung
CH595036A5 (en) * 1975-05-30 1978-01-31 Novelectric Ag Fluorescent lamp control circuit
EP0111296A1 (fr) * 1982-12-10 1984-06-20 Siemens Aktiengesellschaft Dispositif pour contrôler l'intensité d'une lampe de décharge à basse pression
DE3327189A1 (de) * 1983-07-28 1985-02-07 Diehl GmbH & Co, 8500 Nürnberg Schaltungsanordnung fuer das zuenden und fuer die helligkeitssteuerung von leuchtstofflampen
WO1985002749A1 (fr) * 1983-12-05 1985-06-20 Wolf, Karl Montage de circuits pour le fonctionnement de lampes a decharge a basse tension a ultraviolet ou a substance fluorescente

Family Cites Families (7)

* 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
DE3025249A1 (de) * 1980-07-03 1982-01-28 Helmut Ulrich Apparatebau, 8000 München Schaltung zur helligkeitssteurung von leuchtstofflampen
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 (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2417594A1 (de) * 1973-04-13 1974-11-07 Matsushita Electric Works Ltd Flimmerfreie gasentladungslampenanordnung
CH595036A5 (en) * 1975-05-30 1978-01-31 Novelectric Ag Fluorescent lamp control circuit
EP0111296A1 (fr) * 1982-12-10 1984-06-20 Siemens Aktiengesellschaft Dispositif pour contrôler l'intensité d'une lampe de décharge à basse pression
DE3327189A1 (de) * 1983-07-28 1985-02-07 Diehl GmbH & Co, 8500 Nürnberg Schaltungsanordnung fuer das zuenden und fuer die helligkeitssteuerung von leuchtstofflampen
WO1985002749A1 (fr) * 1983-12-05 1985-06-20 Wolf, Karl Montage de circuits pour le fonctionnement de lampes a decharge a basse tension a ultraviolet ou a substance fluorescente

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5652481A (en) * 1994-06-10 1997-07-29 Beacon Light Products, Inc. Automatic state tranition controller for a fluorescent lamp
US5955847A (en) * 1994-06-10 1999-09-21 Beacon Light Products, Inc. Method for dimming a fluorescent lamp
WO1997011580A1 (fr) * 1995-09-19 1997-03-27 Beacon Light Products, Inc. Circuit de prechauffage et d'amorçage pour lampe fluorescente et procede associe
WO1997011585A1 (fr) * 1995-09-19 1997-03-27 Beacon Light Products, Inc. Circuit resonnant de regulation, d'amorçage et de multiplication de la tension destine a une lampe fluorescente
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

Also Published As

Publication number Publication date
DE59104466D1 (de) 1995-03-16
DE4025939A1 (de) 1992-02-20
EP0471331B1 (fr) 1995-02-01
DE4025939C2 (de) 1994-03-24

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