EP1425943A1 - Method and device for operating a fluorescent tube in an energy saving manner - Google Patents

Method and device for operating a fluorescent tube in an energy saving manner

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Publication number
EP1425943A1
EP1425943A1 EP02767133A EP02767133A EP1425943A1 EP 1425943 A1 EP1425943 A1 EP 1425943A1 EP 02767133 A EP02767133 A EP 02767133A EP 02767133 A EP02767133 A EP 02767133A EP 1425943 A1 EP1425943 A1 EP 1425943A1
Authority
EP
European Patent Office
Prior art keywords
filament
fluorescent tube
circuit arrangement
heating current
electronic circuit
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
EP02767133A
Other languages
German (de)
French (fr)
Other versions
EP1425943B1 (en
Inventor
Ewald Ehmen
Jürgen NewTronic GmbH SCHNEIDER
Karl-Heinz NewTronic GmbH STUTZER
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.)
NeoSave Europe Ltd
Original Assignee
Neosave 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 Neosave GmbH filed Critical Neosave GmbH
Publication of EP1425943A1 publication Critical patent/EP1425943A1/en
Application granted granted Critical
Publication of EP1425943B1 publication Critical patent/EP1425943B1/en
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
    • H05B41/26—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
    • H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/0075—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources
    • F21V19/008—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps
    • F21V19/0085—Fastening of light sources or lamp holders of tubular light sources, e.g. ring-shaped fluorescent light sources of straight tubular light sources, e.g. straight fluorescent tubes, soffit lamps at least one conductive element acting as a support means, e.g. resilient contact blades, piston-like contact

Definitions

  • the invention relates to a method and a device for energy-saving operation of a fluorescent tube, in particular a T5 fluorescent tube.
  • T5 fluorescent tubes are often operated today in T8 fluorescent tube holders, so that existing lamp holders for the older T8 fluorescent tubes are used for the modern T5 fluorescent tubes.
  • a first adapter adapter is arranged at a first end of the T5 fluorescent tube and a second adapter adapter is arranged at a second end of the T5 fluorescent tube in order to compensate for a difference in length of the shorter T5 fluorescent tubes compared to the T8 fluorescent tubes.
  • An electronic ballast (EVG) is arranged on the second adapter adapter to operate the fluorescent tube in an energy-saving manner.
  • the electronic ballast generates a high-frequency voltage and controls the switching on and off of a heating current for preheating incandescent filaments arranged at the two ends of the T5 fluorescent tube before the T5 fluorescent tube is ignited and in dimming mode.
  • a heating current for preheating incandescent filaments arranged at the two ends of the T5 fluorescent tube before the T5 fluorescent tube is ignited and in dimming mode.
  • An electronic circuit arrangement arranged on the second adapter intermediate piece controls the heating power supply of the incandescent filament at the first end of the T5 fluorescent tube.
  • the TOE takes on this task.
  • the object of the invention is to provide an improved method and an improved device for energy-saving operation of a fluorescent tube, in particular a T5 fluorescent tube, which (which) enables the heating current on the filament of the fluorescent tube to be controlled independently of unfavorable environmental influences.
  • This object is achieved according to the invention by a method according to independent claims 1 and devices according to independent claims 5 and 8.
  • the invention essentially comprises monitoring an operating parameter of the incandescent filament at one end of the fluorescent tube, which is formed with respect to another end of the fluorescent tube.
  • An energy saving device (EVG) is arranged at the other end of the fluorescent tube.
  • the monitoring of the operating parameter is carried out with the aid of monitoring means of an electronic circuit arrangement, the electronic circuit arrangement controlling the switching off of the heating current for the filament at one end depending on the monitored operating parameter.
  • No signals are exchanged between the electronic circuit arrangement and the energy-saving device by means of an optical transmission link or a signal line, as is provided in the prior art.
  • conditions during operation of the fluorescent tube which can hinder the signal transmission between the energy-saving device and the electronic circuit arrangement, are prevented from influencing the automatic control.
  • This enables the fluorescent tubes to be operated reliably in an energy-saving manner even under operating conditions, which arise, for example, when moisture or dirt lead to deposits on the fluorescent tube or the associated components, which impedes optical signal transmission.
  • the times of switching on / off the heating currents at the filament as well as the duration of the application of the filament with the heating current can be timed with the heating current applied to the filament, which is connected to the Energy saving device is coupled to be synchronized.
  • the application of the two heating filaments with the respective heating current can either be shifted in time with respect to one another or can be carried out simultaneously, which is true both for switching on and switching off the heating current.
  • a frequency-dependent operating voltage on the further incandescent filament, which is not coupled to the electronic ballast, is particularly suitable as the operating parameter, which is monitored with the aid of monitoring means of the electronic circuit arrangement.
  • the frequency-dependent operating voltage can expediently be used to induce a frequency-dependent voltage in a resonant circuit, which is used as an indicator of the need to switch the heating current on and off for the incandescent filament.
  • the frequency of the burning voltage changes on the incandescent filament that is not coupled to the electronic ballast.
  • This change in frequency and the thereby induced voltage in the resonant circuit is used as a control signal for a change in the heating current applied to the filament.
  • the electronic circuit arrangement which is separate from the electronic ballast and is coupled to the filament, is designed so that the heating current at the filament is controlled automatically as a function of the monitored operating parameter.
  • the method and the device in which an operating parameter of the incandescent filament is used as the starting point for controlling the heating current applied to the incandescent filament, can expediently be used for the energy-saving operation of a T5 fluorescent tube.
  • T5 fluorescent tubes are used in a lamp holder that was originally intended for another model of fluorescent tube, for example a T8 lamp, the electronic ballast and / or the electronic circuit arrangement can be integrated into adapters that hold the T5 lamp in serve the conventional version.
  • FIG. 1 shows an arrangement for energy-saving operation of a T5 fluorescent tube in two T8 fluorescent tube holders
  • FIG. 2 shows an electronic circuit arrangement for controlling the heating current of a filament at the end of a T5 fluorescent tube facing away from the electronic ballast in the arrangement according to FIG. 1;
  • FIG. 3 shows a further arrangement for energy-saving operation of a T5 fluorescent tube in two T8 fluorescent tube holders;
  • FIG. 4 shows an electronic circuit arrangement for controlling the heating current of a filament at the end of a T5 fluorescent tube facing away from the electronic ballast in the further arrangement according to FIG. 3.
  • Figure 1 shows an arrangement for operating a modern T5 fluorescent tube 1 in a first T8 fluorescent tube holder 2 and a second T8 fluorescent tube holder 3.
  • Die first and second. T8 fluorescent tube holders 2, 3 each have two receptacles 4, 5 and 6, 7, respectively.
  • a first intermediate adapter 9 is arranged between a first end 8 of the T5 fluorescent tube 1 and the first T8 fluorescent tube holder 2.
  • a second intermediate adapter 11 is arranged between a second end 10 of the T5 fluorescent tube 1 and the second T8 fluorescent tube holder 3.
  • Pins 12 and 13 of the first intermediate adapter 9 are electrically conductively connected to the receptacles 4 and 5 of the first T8 fluorescent tube holder 2.
  • connection pins 14 and 15 of the second intermediate adapter 11 are electrically conductively connected to the receptacles 6 and 7 of the second T8 fluorescent tube holder 3.
  • An electronic ballast 16 is arranged on the second intermediate adapter 11. Two connecting cables 17 and 18 connect a first connection socket 19 and a second connection socket 20 of the electronic ballast 16 to the connection pins 14 and 15 of the second intermediate adapter 11. In this way, the electronic ballast 16 is supplied with electrical voltage.
  • the electronic ballast 16 comprises a plurality of electronic components 21, 22 and 23, the specific implementation of which can be selected by a person skilled in the art depending on the application for the energy-saving operation of the fluorescent tube for a known electronic ballast.
  • the electronic ballast 16 generates a high-frequency signal, which is forwarded via a third connection socket 24 and a fourth connection socket 25 by means of two supply lines 26 and 27 to receiving sockets 28 and 29 of the second adapter intermediate piece 11.
  • a first incandescent filament 32 is electrically conductively connected to the high-frequency signal via contact pins 30 and 31 of the second end 10 of the T5 fluorescent tube 1, which are arranged in the receiving sockets 28 and 29.
  • a second incandescent filament 33 at the first end 8 of the T5 fluorescent tube 1 is connected to an electronic circuit arrangement 38 via contact pins 34 and 35 and corresponding receptacles 36 and 37 of the first adapter intermediate piece 9.
  • the electronic circuit arrangement 38 is also connected to the connecting pins 12 and 13 of the first T8 fluorescent tube holder 2.
  • FIG. 1 shows an embodiment for the electronic circuit arrangement 38.
  • a system voltage which is present across the receptacles 4 and 5 of the T8 fluorescent tube holder 2, is supplied to the electronic circuit arrangement 38 at connecting pins 12 and 13 (cf. FIG. 1). This is usually 220V AC power supply.
  • the second filament 33 which is conductively connected to the connections 36 and 37, is supplied with heating current via two half-coils 41 and 42 wound in opposite directions. Due to the opposite winding directions of the half-coils 41 and 42, no voltage is induced in a second coil 43 by the heating current of the incandescent filament 33 (not shown in FIG. 2). Only the high-frequency lamp burning current flowing through one of the two half-coils induces a voltage in the second coil 43. The high-frequency lamp current only flows from / to one of the two connections 12 or 13. The voltage induced in the second coil 43 is rectified by means of a diode 44. The induced rectified voltage charges a charging capacitor 45. A resistor 46 and a capacitor 47 represent a filter element.
  • a voltage difference occurring between point 48 and point 49 of the circuit is given by a voltage falling across a resistor 50 and a light-sensitive photodiode 51 (identical to the light-sensitive diode 40 in FIG. 1) and depends on the light incident on the photodiode 51.
  • the voltage difference between points 48 and 49 is identical to the voltage difference between a gate and a source of a field effect transistor 52.
  • the field effect transistor 52 is a normally-off end channel field effect transistor which is mounted in a heat-conducting manner. This switches through fully at a voltage difference of approximately +5 V between the gate and source. In the switched-on state, the second filament 33 (not shown in FIG.
  • FIG. 3 shows a further arrangement for energy-saving operation of a T5 fluorescent tube, in which, in contrast to the arrangement according to FIG.
  • FIG. 4 shows an embodiment of the electronic circuit arrangement 38 provided for use in the arrangement according to FIG. 3 in detail.
  • the same reference numerals in FIGS. 4 and 2 denote the same features.
  • a capacitor 61 is arranged parallel to the second coil 43. This forms a parallel resonant circuit, which is tuned so that between a point 62 and a point 63 a maximum voltage amplitude occurs at the high frequency of the lamp current at which the T5 fluorescent tube 1 generates a maximum amount of light.
  • the frequency for operating the t5 fluorescent tube is increased further.
  • the voltage amplitude occurring between points 62 and 63 drops.
  • This voltage amplitude ⁇ influences the voltage difference between the gate and source of the field effect transistor 52.
  • the parallel resonant circuit formed by the second coil 43 and the capacitor 61 thus replaces the function of the light-sensitive photodiode 51 of the circuit according to FIG. 2.
  • the electronic circuit arrangement of FIG. 4 has diodes 64 and 65, which prevent the current from flowing back. Otherwise, the mode of operation of the electronic circuit arrangement of FIG. 4 is identical to the electronic circuit arrangement described above with reference to FIG. 2.
  • a low-frequency current (50 Hz mains current) flows through the half-coils 41 and 42 and the second filament 33, which is connected to the connections 36 and 37.
  • a high-frequency current flows through one of the two half-coils 41, 42.
  • the charging capacitor 45 is charged, and the one applied to the charging capacitor 45 Voltage is smoothed by means of resistor 46 and capacitor 47.
  • the capacitor 47 also serves to delay the time.
  • the voltage induced in the parallel resonant circuit causes a positive voltage difference between the gate and the source of the field effect transistor 52.
  • the field effect transistor 52 is turned on and short-circuits the second filament 33 (not shown in FIG. 4) between the connections 36 and 37 via the bridge rectifier 53 , In the switched-on state of the field effect transistor 52, heating current no longer flows through the second incandescent filament 33 connected to the connections 36 and 37.
  • the frequency with which the T5 fluorescent tube is operated is increased. This reduces the voltage induced in the resonant circuit. A decrease in the induced voltage also results in a reduction in the voltage difference between the gate and the source of the field effect transistor 52. If the voltage difference between the gate and source decreases, the field effect transistor 52 begins to block. In this case, the second filament 33 (not shown in FIG. 4) is no longer short-circuited via the bridge rectifier 53, so that a heating current can flow again through the second filament 33 connected to the connections 36 and 37. A resistance value which is in the order of magnitude of the resistance value of the filament can be assigned to the branch with the field effect transistor. Part of the current thus flows through the FET and part through the filament. The heating current flowing through the second filament 33 is thus inversely proportional to the current flowing through the field effect transistor 52.

Landscapes

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

Abstract

The invention relates to a method and a device for operating a fluorescent tube, especially a T5-fluorescent tube in an energy saving manner. In a first operational mode, a spiral-wound filament disposed on an end of the fluorescent tube is impinged upon by a heating current and a second spiral-wound filament disposed on an end opposite the end of the fluorescent tube is impinged upon by a second heating current. The second spiral-wound filament is connected to an energy saving circuit arrangement. In a second mode of operation, impingement of the spiral-wound filament and the second spiral wound filament with the heating current or the second heating current is interrupted. The inventive device is provided with monitoring means which are contained in the electronic circuit in order to monitor an operating parameter of the second spiral-wound filament in the first and second mode of operation. Said electronic circuit enables control of the time interval of impingement of the second spiral-wound filament by the second heating current according to the time interval of impingement of the first spiral-wound filament with the first heating current.

Description

Verfahren und Vorrichtung zum energiesparenden Betreiben einer Leuchtstoffröhre Method and device for energy-saving operation of a fluorescent tube
Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zum energiesparenden Betreiben einer Leuchtstoffröhre, insbesondere einer T5-Leuchtstoffröhre.The invention relates to a method and a device for energy-saving operation of a fluorescent tube, in particular a T5 fluorescent tube.
T5-Leuchtsstoffröhren werden heute häufig in T8-Leuchtstoffröhrenfassungen betrieben, so daß vorhandene Lampenfassungen für die älteren T8-Leuchtstoffröhren für die modernen T5- Leuchtsstoffröhren genutzt werden. Hierbei wird an einem ersten Ende der T5- Leuchtsstoffröhre ein erstes Adapterzwischenstück und an einem zweiten Ende der T5- Leuchtsstoffröhre ein zweites Adapterzwischenstück angeordnet, um einen Längenunterschied der im Vergleich zu den T8-Leuchtstoffröhren kürzeren T5 -Leuchtstoffröhren auszu- gleichen. An dem zweiten Adapterzwischenstück wird ein elektronisches Vorschaltgerät (EVG) angeordnet, um die Leuchtstoffröhre energiesparend zu betreiben. ZU diesem Zweck erzeugt das EVG eine hochfrequente Spannung und steuert das Ein- und Ausschalten eines Heizstroms zum Vorheizen von an den beiden Enden der T5-Leuchtstoffröhre angeordneten Glühwendeln vor dem Zünden der T5-Leuchtstoffröhre und im Dimmbetrieb. Für einen opti- mierten Betrieb der T5-Leuchtstoffröhre ist es erforderlich, daß die Glühwendeln auf beiden Seiten der T5-Leuchtstoffröhre zeitgleich mit einem Heizstrom versorgt werden. Eine an dem zweiten Adapterzwischenstück angeordnete elektronische Schaltungsanordnung steuert die Heizstromversorgung der Glühwendel an dem ersten Ende der T5-Leuchtstoffröhre. An dem zweiten Ende übernimmt diese Aufgabe das EVG.T5 fluorescent tubes are often operated today in T8 fluorescent tube holders, so that existing lamp holders for the older T8 fluorescent tubes are used for the modern T5 fluorescent tubes. In this case, a first adapter adapter is arranged at a first end of the T5 fluorescent tube and a second adapter adapter is arranged at a second end of the T5 fluorescent tube in order to compensate for a difference in length of the shorter T5 fluorescent tubes compared to the T8 fluorescent tubes. An electronic ballast (EVG) is arranged on the second adapter adapter to operate the fluorescent tube in an energy-saving manner. For this purpose, the electronic ballast generates a high-frequency voltage and controls the switching on and off of a heating current for preheating incandescent filaments arranged at the two ends of the T5 fluorescent tube before the T5 fluorescent tube is ignited and in dimming mode. For optimized operation of the T5 fluorescent tube, it is necessary that the filaments on both sides of the T5 fluorescent tube are supplied with a heating current at the same time. An electronic circuit arrangement arranged on the second adapter intermediate piece controls the heating power supply of the incandescent filament at the first end of the T5 fluorescent tube. At the second end, the TOE takes on this task.
Aus der internationalen Patentanmeldung PCT/DEO 1/04139 ist bekannt, zum synchronisierten Ein- und Ausschalten des Heizstroms auf beiden Seiten der T5-Leuchtstoffröhre von dem EVG an die elektronische Schaltungsanordnung ein Signal optisch, insbesondere im infraroten Spektralbereich, oder mittels einer zusätzlichen Signalleitung zu übermitteln. Der Nachteil der optischen Signalübermittlung ist, daß der Lichtweg z.B. durch Staub oder Partikel gestört werden kann. Die Verwendung einer zusätzliche Leitung, erfordert, daß diese verlegt wird, was zusätzliche Kosten verursacht und somit ebenfalls nachteilig ist.From the international patent application PCT / DEO 1/04139 it is known for the synchronized switching on and off of the heating current on both sides of the T5 fluorescent tube from the electronic ballast to the electronic circuit arrangement, a signal optically, in particular in the infrared spectral range, or by means of an additional signal line to transfer. The disadvantage of optical signal transmission is that the light path e.g. can be disturbed by dust or particles. The use of an additional line requires that it be laid, which causes additional costs and is therefore also disadvantageous.
Aufgabe der Erfindung ist es, ein verbessertes Verfahren und eine verbesserte Vorrichtung zum energiesparenden Betreiben einer Leuchtstoffröhre, insbesondere einer T5- Leuchtstoffröhre zu schaffen, daß (die) eine von ungünstigen Umwelteinflüssen unabhängige Steuerung des Heizstroms an der Glühwendel der Leuchtstoffröhre ermöglicht. Diese Aufgabe wird erfmdungsgemäß durch ein Verfahren nach dem unabhängigen Ansprüche 1 sowie Vorrichtungen nach den unabhängigen Ansprüchen 5 und 8 gelöst.The object of the invention is to provide an improved method and an improved device for energy-saving operation of a fluorescent tube, in particular a T5 fluorescent tube, which (which) enables the heating current on the filament of the fluorescent tube to be controlled independently of unfavorable environmental influences. This object is achieved according to the invention by a method according to independent claims 1 and devices according to independent claims 5 and 8.
Die Erfindung umfaßt als wesentlichen Gedanken eine Überwachung eines Betriebsparameters der Glühwendel an einem Ende der Leuchtstoffröhre, das gegenüber einem anderen der Leuchtstoffröhre ausgebildet ist. An dem anderen Ende der Leuchtstoffröhre ist eine Energiespareinrichtung (EVG) angeordnet. Die Überwachung des Betriebsparameters wird mit Hilfe von Überwachungsmitteln einer elektronischen Schaltungsanofdnung ausgeführt, wobei die elektronische Schaltungsanordnung in Abhängigkeit von dem überwachten Betriebsparameter das Abzuschalten des Heizstroms für die Glühwendel an dem einen Ende steuert. Zwischen der elektronischen Schaltungsanordnung und der Energiespareinrichtung werden keine Signale mittels einer optischen Übertragungsstrecke oder einer Signalleitung ausgetauscht, wie dieses beim Stand der Technik vorgesehen ist. Auf diese Weise wird verhindert, daß Bedingungen beim Betrieb der Leuchtstoffröhre, die die Signalübertragung zwischen der Energiespareinrichtung und der elektronischen Schaltungsanordnung behindern können, Einfluß auf die automatische Steuerung . der Beaufschlagung der Glühwendel an dem einen Ende mit Heizstrom haben können. Hierdurch ist es ermöglicht, daß die Leuchtstoffröhren auch unter Betriebsbedingungen zuverlässig energiesparend betrieben werden können, die beispielsweise entstehen, wenn Feuchtigkeit oder Schmutz zu Ablagerungen auf der Leuchtstoffröhre oder den zugehörigen Bauteilen führen, was eine optische Signalübertragung behindert. Die An- Wendungsmöglichkeiten der Energiespareinrichtungen werden so erweitert.The invention essentially comprises monitoring an operating parameter of the incandescent filament at one end of the fluorescent tube, which is formed with respect to another end of the fluorescent tube. An energy saving device (EVG) is arranged at the other end of the fluorescent tube. The monitoring of the operating parameter is carried out with the aid of monitoring means of an electronic circuit arrangement, the electronic circuit arrangement controlling the switching off of the heating current for the filament at one end depending on the monitored operating parameter. No signals are exchanged between the electronic circuit arrangement and the energy-saving device by means of an optical transmission link or a signal line, as is provided in the prior art. In this way, conditions during operation of the fluorescent tube, which can hinder the signal transmission between the energy-saving device and the electronic circuit arrangement, are prevented from influencing the automatic control. can have heating current applied to the filament at one end. This enables the fluorescent tubes to be operated reliably in an energy-saving manner even under operating conditions, which arise, for example, when moisture or dirt lead to deposits on the fluorescent tube or the associated components, which impedes optical signal transmission. The application possibilities of the energy saving devices are expanded.
Mit Hilfe der Überwachung des Betriebsparameters der Glühwendel, welche nicht ah die Energiespareimichtung gekoppelt ist, können die Zeitpunkte des Zu-/Abschaltens der Heizströme an der Glühwendel sowie die Dauer der Beaufschlagung der Glühwendel mit dem Heizstrom zeitlich mit der Heizstrombeaufschlagung der Glühwendel, welche an die Energie- Spareinrichtung gekoppelt ist, synchronisiert werden. Hierdurch können das Beaufschlagen der beiden Glühwendeln mit dem jeweiligen Heizstrom entweder zeitlich zueinander verschoben oder gleichzeitig ausgeführt werden, was sowohl für das Zuschalten als auch das Abschalten des Heizstroms zutrifft.With the help of the monitoring of the operating parameters of the filament, which is not coupled to the energy saving device, the times of switching on / off the heating currents at the filament as well as the duration of the application of the filament with the heating current can be timed with the heating current applied to the filament, which is connected to the Energy saving device is coupled to be synchronized. As a result, the application of the two heating filaments with the respective heating current can either be shifted in time with respect to one another or can be carried out simultaneously, which is true both for switching on and switching off the heating current.
Als Betriebsparameter, welcher mit Hilfe von Überwachungsmitteln der elektronischen Schaltungsanordnung überwacht wird, eignet sich insbesondere eine frequenzabhängige Brennspannung an der weiteren Glühwendel, welche nicht an das EVG gekoppelt ist. Zweckmäßig kann die frequenzabhängige Brennspannung dazu genutzt werden, in einem Resonanzschwingkreis eine frequenzabhängige Spannung zu induzieren, die als Indikator für die Notwendigkeit des Zu-/Abschaltens des Heizstroms für die Glühwendel genutzt wird. Beim Betreiben der Leuchtstoffröhre in einem Dimmbetrieb ändert sich die Frequenz der Brenn- Spannung an der nicht an das EVG gekoppelten Glühwendel. Diese Frequenzänderung und die hierdurch geänderte induzierte Spannung in dem Resonanzschwingkreis wird als Steuersignal für eine Änderung der Beaufschlagung der Glühwendel mit dem Heizstrom genutzt. Die von dem EVG getrennt ausgebildete elektronische Schaltungsanordnung, welche an die Glühwendel gekoppelt ist, ist so ausgeführt, daß die Steuerung des Heizstroms an der Glüh- wendel in Abhängigkeit von dem überwachten Betriebsparameter automatisch erfolgt.A frequency-dependent operating voltage on the further incandescent filament, which is not coupled to the electronic ballast, is particularly suitable as the operating parameter, which is monitored with the aid of monitoring means of the electronic circuit arrangement. The frequency-dependent operating voltage can expediently be used to induce a frequency-dependent voltage in a resonant circuit, which is used as an indicator of the need to switch the heating current on and off for the incandescent filament. When the fluorescent tube is operated in a dimming mode, the frequency of the burning voltage changes on the incandescent filament that is not coupled to the electronic ballast. This change in frequency and the thereby induced voltage in the resonant circuit is used as a control signal for a change in the heating current applied to the filament. The electronic circuit arrangement, which is separate from the electronic ballast and is coupled to the filament, is designed so that the heating current at the filament is controlled automatically as a function of the monitored operating parameter.
Das Verfahren und die Vorrichtung, bei dem (der) ein Betriebsparameter der Glühwendel als Ausgangspunkt zur Steuerung der Heizstrombeaufschlagung der Glühwendel genutzt wird, kann zweckmäßig zum energiesparenden Betreiben einer T5 -Leuchtstoffröhre genutzt werden. Wenn T5 -Leuchtstoffröhren in einer Lampenfassung genutzt werden, die ursprünglich für ein anderes Modell einer Leuchtstoffröhre, beispielsweise eine T8-Lampe vorgesehen war, so können das EVG und/oder die elektronische Schaltungsanordnung in Adapter integriert werden, die zum Halten der T5-Lampe in der herkömmlichen Fassung dienen.The method and the device, in which an operating parameter of the incandescent filament is used as the starting point for controlling the heating current applied to the incandescent filament, can expediently be used for the energy-saving operation of a T5 fluorescent tube. If T5 fluorescent tubes are used in a lamp holder that was originally intended for another model of fluorescent tube, for example a T8 lamp, the electronic ballast and / or the electronic circuit arrangement can be integrated into adapters that hold the T5 lamp in serve the conventional version.
Die Erfindung wird im folgenden anhand eines Ausfuhrungsbeispiels unter Bezugnahme auf eine Zeichnung erläutert. Hierbei zeigen: Figur 1 eine Anordnung zum energiesparenden Betreiben einer T5 -Leuchtstoffröhre in zwei T8-Leuchtstoffröhrenfassungen;The invention is explained below using an exemplary embodiment with reference to a drawing. 1 shows an arrangement for energy-saving operation of a T5 fluorescent tube in two T8 fluorescent tube holders;
Figur 2 eine elektronische Schaltungsanordnung zum Steuern des Heizstroms einer Glühwendel an dem vom EVG abgewandten Ende einer T5 -Leuchtstoffröhre bei der Anordnung nach Figur 1 ; Figur 3 eine weitere Anordnung zum energiesparenden Betreiben einer T5-Leuchtstoff- röhre in zwei T8-Leuchtstoffröhrenfassungen; undFIG. 2 shows an electronic circuit arrangement for controlling the heating current of a filament at the end of a T5 fluorescent tube facing away from the electronic ballast in the arrangement according to FIG. 1; FIG. 3 shows a further arrangement for energy-saving operation of a T5 fluorescent tube in two T8 fluorescent tube holders; and
Figur 4 eine elektronische Schaltungsanordnung zum Steuern des Heizstroms einer Glühwendel an dem vom EVG abgewandten Ende einer T5-Leuchtstoffröhre bei der weiteren Anordnung nach Figur 3.FIG. 4 shows an electronic circuit arrangement for controlling the heating current of a filament at the end of a T5 fluorescent tube facing away from the electronic ballast in the further arrangement according to FIG. 3.
Figur 1 zeigt eine Anordnung zum Betreiben einer modernen T5-Leuchtstoffröhre 1 in einer ersten T8-Leuchtstoffröhrenfassung 2 und einer zweiten T8-Leuchtstoffröhrenfassung 3. Die erste und zweite. T8-Leuchtstoffröhrenfassung 2, 3 weisen jeweils zwei Aufnahmen 4, 5 bzw. 6, 7 auf. Zwischen einem ersten Ende 8 der T5 Leuchtstoffröhre 1 und der ersten T8- Leuchtstoffröhrenfassung 2 ist ein erster Zwischenadapter 9 angeordnet. Zwischen einem zweiten Ende 10 der T5 Leuchtstoffröhre 1 und der zweiten T8-Leuchtstoffröhrenfassung 3 ist ein zweiter Zwischenadapter 11 angeordnet. Anschlußstifte 12 bzw. 13 des ersten Zwischenadapters 9 sind mit den Aufnahmen 4 bzw. 5 der ersten T8-Leuchtstoffröhrenfassung 2 elektrisch leitend verbunden. Entsprechend sind Anschlußstifte 14 bzw. 15 des zweiten Zwischenadapters 11 mit den Aufnahmen 6 bzw. 7 der zweiten T8-Leuchtstoffröhrenfassung 3 elektrisch leitend verbunden. An dem zweiten Zwischenadapter 11 ist ein elektronisches Vor- schaltgerät 16 angeordnet. Zwei Verbindungskabel 17 bzw. 18 verbinden eine erste Anschlußbuchse 19 und eine zweite Anschlußbuchse 20 des elektronischen Vorschaltgeräts 16 mit den Anschlußstiften 14 und 15 des zweiten Zwischenadapters 11. Auf diese Weise wird das elektronische Vorschaltgerät 16 mit elektrischer Spannung versorgt. Das elektronische Vorschaltgerät 16 umfaßt mehrere elektronische Komponenten 21, 22 und 23, deren konkrete Ausführung vom Fachmann in Abhängigkeit vom Anwendungsfall für den energiesparenden Betrieb der Leuchtstoffröhre für ein als solches bekanntes EVG ausgewählt werden kann. Das elektronischen Vorschaltgeräts 16 erzeugt ein Hochfrequenzsignal, welches über eine dritte Anschlußbuchse 24 und eine vierte Anschlußbuchse 25 mittels zweier Zuleitungen 26 und 27 an Aufnahmebuchsen 28 und 29 des zweiten Adapterzwischenstücks 11 weitergeleitet wird. Über Kontaktstifte 30 und 31 des zweiten Endes 10 der T5 Leuchtstoffröhre 1, die in den Aufnahmebuchsen 28 und 29 angeordnet sind, ist eine erste Glühwendel 32 elektrisch leitend mit dem Hochfrequenzsignal verbunden. Eine zweite Glühwendel 33 am ersten Ende 8 der T5 -Leuchtstoffröhre 1 ist über Kontaktstifte 34 und 35 und entsprechende Aufnahmen 36 und 37 des ersten Adapterzwischenstücks 9 mit einer elektronischen Schaltungsanordnung 38 ver- bunden. Die elektronische Schaltungsanordnung 38 ist ebenfalls mit den Verbindungsstiften 12 und 13 der ersten T8-Leuchtstoffröhrenfassung 2 verbunden. Für einen Warmstart der T5- Leuchtstoffröhre 1 und für einen reibungslosen Dimmbetrieb der T5 -Leuchtstoffröhre 1 ist es erforderlich, daß die erste Glühwendel 32 und die zweite Glühwendel 33 geheizt werden. Im ungedimmten Dauerbetrieb ist es hingegen erforderlich, daß die erste Glühwendel 32 und die zweite Glühwendel 33 nicht geheizt werden. Um ein zeitgleiches Heizen der ersten Glühwendeln 32 und der zweiten Glühwendel 33 zu erreichen, wird beispielsweise mittels einer Infra- rotleuchtdiode 39 ein Signal an eine lichtempfindliche Diode 40 übermittelt, mittels dessen die elektronische Schaltungsanordnung 38 veranlaßt wird, die zweite Glühwendel 33 zu heizen oder den Heizbetrieb einzustellen. Figur 2 zeigt eine Ausfuhrungsform für die elektronische Schaltungsanordnung 38. Gleiche Merkmale sind mit den gleichen Bezugszeichen wie in Figur 1 versehen. An Verbindungsstiften 12 und 13 wird eine Systemspannung, die über den Aufnahmen 4 und 5 der T8- Leuchtstoffröhrenfassung 2 anliegt, der elektronischen Schaltungsanordnung 38 zugeführt (vgl. Figur 1). Hierbei handelt es sich üblicherweise um 220V Wechselsstrom der Netzversorgung.Figure 1 shows an arrangement for operating a modern T5 fluorescent tube 1 in a first T8 fluorescent tube holder 2 and a second T8 fluorescent tube holder 3. Die first and second. T8 fluorescent tube holders 2, 3 each have two receptacles 4, 5 and 6, 7, respectively. A first intermediate adapter 9 is arranged between a first end 8 of the T5 fluorescent tube 1 and the first T8 fluorescent tube holder 2. A second intermediate adapter 11 is arranged between a second end 10 of the T5 fluorescent tube 1 and the second T8 fluorescent tube holder 3. Pins 12 and 13 of the first intermediate adapter 9 are electrically conductively connected to the receptacles 4 and 5 of the first T8 fluorescent tube holder 2. Correspondingly, connection pins 14 and 15 of the second intermediate adapter 11 are electrically conductively connected to the receptacles 6 and 7 of the second T8 fluorescent tube holder 3. An electronic ballast 16 is arranged on the second intermediate adapter 11. Two connecting cables 17 and 18 connect a first connection socket 19 and a second connection socket 20 of the electronic ballast 16 to the connection pins 14 and 15 of the second intermediate adapter 11. In this way, the electronic ballast 16 is supplied with electrical voltage. The electronic ballast 16 comprises a plurality of electronic components 21, 22 and 23, the specific implementation of which can be selected by a person skilled in the art depending on the application for the energy-saving operation of the fluorescent tube for a known electronic ballast. The electronic ballast 16 generates a high-frequency signal, which is forwarded via a third connection socket 24 and a fourth connection socket 25 by means of two supply lines 26 and 27 to receiving sockets 28 and 29 of the second adapter intermediate piece 11. A first incandescent filament 32 is electrically conductively connected to the high-frequency signal via contact pins 30 and 31 of the second end 10 of the T5 fluorescent tube 1, which are arranged in the receiving sockets 28 and 29. A second incandescent filament 33 at the first end 8 of the T5 fluorescent tube 1 is connected to an electronic circuit arrangement 38 via contact pins 34 and 35 and corresponding receptacles 36 and 37 of the first adapter intermediate piece 9. The electronic circuit arrangement 38 is also connected to the connecting pins 12 and 13 of the first T8 fluorescent tube holder 2. For a warm start of the T5 fluorescent tube 1 and for a smooth dimming operation of the T5 fluorescent tube 1, it is necessary that the first filament 32 and the second filament 33 are heated. In the non-dimmed continuous operation, however, it is necessary that the first filament 32 and the second filament 33 are not heated. In order to achieve simultaneous heating of the first incandescent filaments 32 and the second incandescent filament 33, a signal is transmitted, for example, by means of an infrared light-emitting diode 39 to a light-sensitive diode 40, by means of which the electronic circuit arrangement 38 is caused to heat the second incandescent filament 33 or the Set heating mode. Figure 2 shows an embodiment for the electronic circuit arrangement 38. The same features are provided with the same reference numerals as in Figure 1. A system voltage, which is present across the receptacles 4 and 5 of the T8 fluorescent tube holder 2, is supplied to the electronic circuit arrangement 38 at connecting pins 12 and 13 (cf. FIG. 1). This is usually 220V AC power supply.
Die zweite Glühwendel 33, die leitend mit den Anschlüssen 36 und 37 verbunden ist, wird über zwei gegenläufig gewickelte Halbspulen 41 und 42 Heizstrom zugeführt. Aufgrund der entgegengesetzten Wicklungsrichtungen der Halbspulen 41 und 42 wird von dem Heizstrom der Glühwendel 33 (in Figur 2 nicht dargestellt) in eine zweite Spule 43 keine Spannung induziert. Lediglich der durch eine der beiden Halbspulen fließende hochfrequente Lampen- brennstrom induziert in der zweiten Spule 43 eine Spannung. Der hochfrequente Lampenstrom fließt nur über einen der beiden Anschlüsse 12 oder 13 ab/zu. Die in der zweiten Spule 43 induzierte Spannung wird mittels einer Diode 44 gleichgerichtet. Die induzierte gleichge- richtete Spannung lädt einen Ladekondensator 45. Ein Widerstand 46 und ein Kondensator 47 stellen ein Siebglied dar.The second filament 33, which is conductively connected to the connections 36 and 37, is supplied with heating current via two half-coils 41 and 42 wound in opposite directions. Due to the opposite winding directions of the half-coils 41 and 42, no voltage is induced in a second coil 43 by the heating current of the incandescent filament 33 (not shown in FIG. 2). Only the high-frequency lamp burning current flowing through one of the two half-coils induces a voltage in the second coil 43. The high-frequency lamp current only flows from / to one of the two connections 12 or 13. The voltage induced in the second coil 43 is rectified by means of a diode 44. The induced rectified voltage charges a charging capacitor 45. A resistor 46 and a capacitor 47 represent a filter element.
Eine zwischen Punkt 48 und Punkt 49 des Schaltkreises auftretende Spannungsdifferenz ist durch eine über einem Widerstand 50 und einer lichtempfindliche Photodiode 51 (identisch zu der lichtempfindlichen Diode 40 in Figurl) abfallende Spannung gegeben und hängt von dem Lichteinfall auf die Photodiode 51 ab. Die Spannungsdifferenz zwischen den Punkten 48 und 49 ist identisch zu der Spannungsdifferenz zwischen einem Gate und einem Source eines Feldeffekttransistors 52. Der Feldeffekttransistor 52 ist ein selbstsperrenden Endkanalfeldeffekttransistor, der wärmeleitend montiert ist. Dieser schaltet bei einer Spannungsdifferenz von ungefähr +5 V zwischen Gate und Source voll durch. In dem durchgeschalteten Zustand wird mittels des Feldeffekttransistors 52 über einen Bückengleichrichter 53 die zweite Glühwendel 33 (in Figur 2 nicht dargestellt) zwischen den Anschlüssen 36 und 37 kurzgeschlossen. Zehnerdioden 54 und 55 sowie ein Widerstand 56 dienen als Spannungsbegrenzer. Ein Widerstand 57 dient zur Festlegung eines Arbeitspunktes des Feldeffekttransistors 52. Eine Leuch- diode 58 mit einem Vorwiderstand 59 liefert eine optische Information, ob der Schaltkreis korrekt arbeitet. Eine nahe dem Feldeffekttransistor 52 angeordnete Sicherung 60 unterbricht im Falle einer Überhitzung des Feldeffekttransistors 52 die Sttomzufuhrung, so daß eine Temperatursicherung geschaffen ist. Figur 3 zeigt eine weitere Anordnung zum energiesparenden Betreiben einer T5- Leuchstoffröhre, bei der im Gegensatz zu der Anordnung nach Figur 1 zwischen der am ersten Adapterzwischenstück 9 angeordneten elektronischen Schaltungsanordnung 38 und dem am zweiten Adapterzwischenstück 11 angeordneten elektronischen Vorschaltgerät 16 keine optische Signalübertragungsstrecke ausgebildet ist. Die Aufgabe der elektronischen Schaltungsanordnung 38 im ersten Adapterzwischenstück 9, die zweite Heizwendel 33 der T5 Leuchtstoffröhre 1 im Bedarfsfalle mit einem Heizstrom zu versorgen, wird von einer elektronischen Schaltungsanordnung erfüllt, für welche in Figur 4 eine Ausfuhrungsform dargestellt ist.A voltage difference occurring between point 48 and point 49 of the circuit is given by a voltage falling across a resistor 50 and a light-sensitive photodiode 51 (identical to the light-sensitive diode 40 in FIG. 1) and depends on the light incident on the photodiode 51. The voltage difference between points 48 and 49 is identical to the voltage difference between a gate and a source of a field effect transistor 52. The field effect transistor 52 is a normally-off end channel field effect transistor which is mounted in a heat-conducting manner. This switches through fully at a voltage difference of approximately +5 V between the gate and source. In the switched-on state, the second filament 33 (not shown in FIG. 2) is short-circuited between the connections 36 and 37 by means of the field effect transistor 52 via a bridge rectifier 53. Zener diodes 54 and 55 and a resistor 56 serve as voltage limiters. A resistor 57 is used to determine an operating point of the field effect transistor 52. A light-emitting diode 58 with a series resistor 59 provides optical information as to whether the circuit is working correctly. A fuse 60 arranged near the field effect transistor 52 interrupts the supply of current in the event of overheating of the field effect transistor 52, so that a temperature fuse is created. FIG. 3 shows a further arrangement for energy-saving operation of a T5 fluorescent tube, in which, in contrast to the arrangement according to FIG. 1, no optical signal transmission path is formed between the electronic circuit arrangement 38 arranged on the first adapter adapter 9 and the electronic ballast 16 arranged on the second adapter adapter 11. The task of the electronic circuit arrangement 38 in the first adapter adapter 9, to supply the second heating coil 33 of the T5 fluorescent tube 1 with a heating current when necessary, is fulfilled by an electronic circuit arrangement, for which an embodiment is shown in FIG.
Figur 4 -zeigt eine Ausführungsgform der zur Nutzung in der Anordnung nach Figur 3 vorgesehenen elektronischen Schaltungsanordnung 38 im Detail. Gleiche Bezugszeichen in den Figuren 4 und 2 bezeichnen gleiche Merkmale. Gemäß Figur 4 ist parallel zur zweiten Spule 43 ein Kondensator 61 angeordnet. Hierdurch wird ein Parallelresonanzschwingkreis ausgebildet, welcher so abgestimmt ist, daß zwischen einem Punkt 62 und einem Punkt 63 eine maximale Spannungsamplitude bei der Hochfrequenz des Lampenstroms auftritt, bei der die T5-Leuchstoffröhre 1 eine maximale Lichtmenge erzeugt. Im Dimmbetrieb wird die Frequenz zum Betreiben der t5 -Leuchtstoffröhre weiter erhöht. In einem solchen Fall sinkt die zwischen den Punkten 62 und 63 auftretende Spannungsamplitude. Diese Spannungsamplitude ι beeinflußt die Spannungsdifferenz zwischen Gate und Source des Feldeffekttransistors 52. Der von der zweiten Spule 43 und dem Kondensator 61 gebildete Parallelresonanzschwingkreis ersetzt somit die Funktion der lichtempfindlichen Photodiode 51 der Schaltung nach Figur 2. Zusätzlich weist die elektronische Schaltungsanordnung der Figur 4 Dioden 64 und 65 auf, die ein zurückfließen des Stroms verhindern. Ansonsten ist die Funktionsweise der elektronischen Schaltungsanordnung der Figur 4 identisch zu der oben bezüglich Figur 2 be- schriebenen elektronische Schaltungsanordnung.FIG. 4 shows an embodiment of the electronic circuit arrangement 38 provided for use in the arrangement according to FIG. 3 in detail. The same reference numerals in FIGS. 4 and 2 denote the same features. According to FIG. 4, a capacitor 61 is arranged parallel to the second coil 43. This forms a parallel resonant circuit, which is tuned so that between a point 62 and a point 63 a maximum voltage amplitude occurs at the high frequency of the lamp current at which the T5 fluorescent tube 1 generates a maximum amount of light. In dimming mode, the frequency for operating the t5 fluorescent tube is increased further. In such a case, the voltage amplitude occurring between points 62 and 63 drops. This voltage amplitude ι influences the voltage difference between the gate and source of the field effect transistor 52. The parallel resonant circuit formed by the second coil 43 and the capacitor 61 thus replaces the function of the light-sensitive photodiode 51 of the circuit according to FIG. 2. In addition, the electronic circuit arrangement of FIG. 4 has diodes 64 and 65, which prevent the current from flowing back. Otherwise, the mode of operation of the electronic circuit arrangement of FIG. 4 is identical to the electronic circuit arrangement described above with reference to FIG. 2.
Beim Einschalten der Leuchtstoffröhre liegt noch kein Hochfrequenzsignal an den Eingängen der T8-Leuchtstoffröhrenfassung an. Ein niederfrequenter Strom (50 Hz Netzstrom) fließt durch die Halbspulen 41 und 42 sowie die zweite Glühwendel 33, die mit den Anschlüssen 36 und 37 verbunden ist. Nachdem die T5 -Leuchtstoffröhre gezündet hat, fließt ein hochfre- quenter Strom durch eine der beiden Halbspulen 41, 42. Dadurch wird in dem aus der Spule 43 und dem Kondensator 61 gebildeten Parallelresonanzschwingkreis eine Spannung induziert. Der Ladekondensator 45 wird aufgeladen, und die am Ladekondensator 45 anliegende Spannung wird mittels des Widerstands 46 und des Kondensators 47 geglättet. Der Kondensator 47 dient darüber hinaus zur Zeitverzögerung.When the fluorescent tube is switched on, there is still no high-frequency signal at the inputs of the T8 fluorescent tube holder. A low-frequency current (50 Hz mains current) flows through the half-coils 41 and 42 and the second filament 33, which is connected to the connections 36 and 37. After the T5 fluorescent tube has ignited, a high-frequency current flows through one of the two half-coils 41, 42. As a result, a voltage is induced in the parallel resonant circuit formed from the coil 43 and the capacitor 61. The charging capacitor 45 is charged, and the one applied to the charging capacitor 45 Voltage is smoothed by means of resistor 46 and capacitor 47. The capacitor 47 also serves to delay the time.
Die in den Parallelresonanzschwingkreis induzierte Spannung bewirkt ein positive Spannungsdifferenz zwischen dem Gate und dem Source des Feldeffekttransistors 52. Dadurch wird der Feldeffekttransistor 52 durchgeschaltet und schließt über den Brückengleichrichter 53 die zweite Gluhwendel 33 (in Figur 4 nicht dargestellt) zwischen den Anschlüssen 36 und 37 kurz. Im durchgeschalteten Zustand des Feldeffekttransistors 52 fließt somit kein Heizstrom mehr durch die mit den Anschlüssen 36 und 37 verbundene zweite Glühwendel 33. .The voltage induced in the parallel resonant circuit causes a positive voltage difference between the gate and the source of the field effect transistor 52. As a result, the field effect transistor 52 is turned on and short-circuits the second filament 33 (not shown in FIG. 4) between the connections 36 and 37 via the bridge rectifier 53 , In the switched-on state of the field effect transistor 52, heating current no longer flows through the second incandescent filament 33 connected to the connections 36 and 37.
Im Dimmbetrieb wird die Frequenz, mit der die T5 -Leuchtstoffröhre betrieben wird, erhöht. Dadurch sinkt die im Resonanzschwingkreis induzierte Spannung. Ein Abnehmen der induzierten Spannung bewirkt zugleich eine Verringerung der Spannungsdifferenz zwischen dem Gate und dem Source des Feldeffekttransistors 52. Sinkt die Spannungsdifferenz zwischen Gate und Source ab, so beginnt der Feldeffekttransistor 52 zu sperren. In diesem Fall ist die zweite Glühwendel 33 (in Figur 4 nicht dargestellt) nicht mehr über den Brückengleichrichter 53 kurzgeschlossen, so daß erneut eine Heizstrom durch die mit den Anschlüssen 36 und 37 verbundene zweite Glühwendel 33 fließen kann. Dem Zweig mit dem Feldeffekttransistor kann ein Widerstandswert zugeordnet werden, der in der Größenordnung des Widerstandswertes der Glühwendel ist. Somit fließt ein Teil des Stroms durch den FET und ein Teil durch die Glühwendel. Der durch die zweite Glühwendel 33 fließende Heizstrom ist somit umge- kehrt proportional zu dem durch den Feldeffekttransistor 52 fließenden Strom. .In dimming mode, the frequency with which the T5 fluorescent tube is operated is increased. This reduces the voltage induced in the resonant circuit. A decrease in the induced voltage also results in a reduction in the voltage difference between the gate and the source of the field effect transistor 52. If the voltage difference between the gate and source decreases, the field effect transistor 52 begins to block. In this case, the second filament 33 (not shown in FIG. 4) is no longer short-circuited via the bridge rectifier 53, so that a heating current can flow again through the second filament 33 connected to the connections 36 and 37. A resistance value which is in the order of magnitude of the resistance value of the filament can be assigned to the branch with the field effect transistor. Part of the current thus flows through the FET and part through the filament. The heating current flowing through the second filament 33 is thus inversely proportional to the current flowing through the field effect transistor 52. ,
Die in der vorstehenden Beschreibung, den Ansprüchen und der Zeichnung offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen von Bedeutung sein. The features of the invention disclosed in the above description, the claims and the drawing can be of importance both individually and in any combination for the implementation of the invention in its various embodiments.

Claims

Ansprüche Expectations
1. Verfahren zum energiesparenden Betreiben einer Leuchtstoffröhre (1), wobei das Verfahren die folgenden Schritte aufweist: - Beaufschlagen einer Glühwendel (32) an einem Ende der Leuchtstoffröhre (1) mit einem Heizstrom in einer ersten Betriebsart, wobei die Glühwendel (32) mit einem elektronischen Energiespar- Schaltungsanordnung (16) verbunden ist;1. A method for energy-saving operation of a fluorescent tube (1), the method comprising the following steps: - Applying a heating current in a first operating mode to a filament (32) at one end of the fluorescent tube (1), the filament (32) being used an electronic energy saving circuit arrangement (16) is connected;
- Beaufschlagen einer weiteren Glühwendel (33) an einem zu dem Ende entgegengesetzten Ende der Leuchtstoffröhre (1) mit einem weiteren Heizstrom, wobei die wei- - tere Glühwendel (33) mit einer von der elektronischen _ Energiespar-- Applying a further heating current to a further filament (33) at an end of the fluorescent tube (1) opposite the end, the further filament (33) having an electronic energy saving
Schaltungsanordnung (16) getrennten elektronischen Schaltungsanordnung (38) verbunden sind; undCircuit arrangement (16) separate electronic circuit arrangement (38) are connected; and
- Unterbrechen der Beaufschlagung der Glühwendel (32) und der weiteren Glühwendel (33) mit dem Heizstrom bzw. dem weiteren Heizstrom in einer zweiten Betriebs- art; wobei mit Hilfe von Überwachungsmitteln, die von der elektronischen Schaltungsanordnung (38) umfaßt sind, ein Betriebsparameter der weiteren Glühwendel (33) in der ersten und der zweiten Betriebsart überwacht wird, um mit Hilfe der elektronischen Schaltungsanordnung (38) in Abhängigkeit von dem überwachten Betriebsparameter einen Zeitraum der Beaufschlagung der weiteren Glühwendel (33) mit dem weiteren- interrupting the application of the filament (32) and the further filament (33) with the heating current or the further heating current in a second operating mode; an operating parameter of the further incandescent filament (33) is monitored in the first and second operating modes with the aid of monitoring means, which are comprised by the electronic circuit arrangement (38), in order to use the electronic circuit arrangement (38) as a function of the monitored operating parameter a period of time for the further incandescent filament (33) to be subjected to the further one
Heizstrom abhängig von einem Zeitraum der Beaufschlagung der Glühwendel (32) mit dem Heizstrom zu steuern.To control the heating current depending on a period of time when the filament (32) is acted on by the heating current.
2. Verfahren nach Anspruch 1, dadurch g e k e nnz e i c h n et, daß als Betriebsparameter der weiteren Glühwendel (33) eine frequenzabhängige Brennspannung an der weiteren2. The method according to claim 1, characterized g e k e nnz e i c h n et that as an operating parameter of the further filament (33) a frequency-dependent operating voltage at the other
Glühwendel (33) überwacht wird.Glow filament (33) is monitored.
3. Verfahren nach Anspruch 2, dadurch g e k e nn z e i c hn et, daß zum Überwachen der Frequenz der Brennspannung eine in einem Resonanzschwingkreis (43, 61) induzierte, frequenzabhängige Spannung genutzt wird.3. The method according to claim 2, characterized g e k e nn z e i c hn et that a frequency-dependent voltage induced in a resonant circuit (43, 61) is used to monitor the frequency of the operating voltage.
4. Verfahren nach einem der vorangehenden Ansprüche, dadurch g e k e nn z e i c hn e t, daß die Leuchtstoffröhre (1) in der ersten Betriebsart in einem Dimmbetrieb betrieben wird. 4. The method according to any one of the preceding claims, characterized geke nn zeic hn et that the fluorescent tube (1) is operated in the first mode in a dimming mode.
5. Vorrichtung zum energiesparenden Betreiben einer Leuchtstoffröhre (1), insbesondere einer T5 -Leuchtstofflampe, mit:5. Device for energy-saving operation of a fluorescent tube (1), in particular a T5 fluorescent lamp, with:
- einer elektronischen Energiespar-Schaltungsanordnung (16), die zum Steuern einer Beaufschlagung einer Glühwendel (32) an einem Ende der Leuchtstoffröhre (1) mit einem Heizstrom an die Glühwendel (32) gekoppelt werden kann; und- An electronic energy-saving circuit arrangement (16) which can be coupled with a heating current to the incandescent filament (32) to control the application of a filament (32) at one end of the fluorescent tube (1); and
- einer von der elektronischen Energiespar-Schaltungsanordnung (16) getrennten, elektronischen Schaltungsanordnung (38), die zum Steuern einer Beaufschlagung ei-- An electronic circuit arrangement (38) which is separate from the electronic energy-saving circuit arrangement (16) and which is used to control an application.
" _ ner weiteren Glühwendel (33) an einem zu dem Ende entgegengesetzten Ende der Leuchtstoffröhre (1) mit einem weiteren Heizstrom an die weitere Glühwendel (33) gekoppelt werden kann; wobei die elektronische Schaltungsanordnung (38) Überwachungsmittel aufweist, um einen Betriebsparameter der weiteren Glühwendel (33) zu überwachen, so daß mit Hilfe der elektronischen Schaltungsanordnung (38) in Abhängigkeit von dem überwachten Betriebsparameter ein Zu-/ Abschalten der Beaufschlagung der weiteren Glühwendel"_ a further incandescent filament (33) at an end of the fluorescent tube (1) opposite the end can be coupled to the further incandescent filament (33) with a further heating current; the electronic circuit arrangement (38) having monitoring means in order to determine an operating parameter of the further Monitor filament (33), so that with the help of the electronic circuit arrangement (38), depending on the monitored operating parameter, switching on / off the application of the additional filament
(33) mit dem weiteren Heizstrom abhängig von einem Ab-/Zuschalten der Beaufschlagung der Glühwendel (32) mit dem Heizstrom gesteuert werden kann.(33) can be controlled with the further heating current as a function of switching the application of the filament (32) on and off with the heating current.
6. Vorrichtung nach Anspruch 5, dadurch g e k e nn z e i chn e t, daß die Überwachungs- mittel Mittel zum Überwachen einer Frequenz einer an der weiteren Glühwendel (33) anliegenden Brennspannung aufweisen.6. The device according to claim 5, characterized in that the monitoring means have means for monitoring a frequency of a burning voltage applied to the further filament (33).
7. Vorrichtung nach Anspruch 6, dadurch g e k e nn z e i c h n e t, daß Mittel zum Überwachen der Frequenz der an der weiteren Glühwendel anliegenden Brennspannung einen Resonanzschwingkreis (43, 16) aufweisen.7. The device according to claim 6, characterized g e k e nn z e i c h n e t that means for monitoring the frequency of the operating voltage applied to the further filament have a resonant circuit (43, 16).
8. Vorrichtung zum Koppeln an eine Glühwendel (33) einer Leuchtstoffröhre (1) mit einer elektronischen Schaltungsanordnung (38) zum betriebsartabhängigen Steuern einer Beaufschlagung der Glühwendel (33) mit einem Heizstrom, wobei die elektronische Schaltungsanordnung (38) Überwachungsmittel aufweist, um eine Frequenz einer8. Device for coupling to a filament (33) of a fluorescent tube (1) with an electronic circuit arrangement (38) for the mode-dependent control of the heating filament (33) being acted upon by a heating current, the electronic circuit arrangement (38) having monitoring means for a frequency one
Brennspannung an der Glühwendel (33) zu überwachen, so daß mit Hilfe der elektronischen Schaltungsanordnung (38) in Abhängigkeit von dem überwachten Frequenz der Brennspannung die Beaufschlagung der Glühwendel (33) mit dem Heizstrom in einer ersten Betriebsart zugeschaltet und in einer zweiten Betriebsart unterbrochen werden kann.Monitor the burning voltage on the filament (33) so that, with the help of the electronic circuit arrangement (38), depending on the monitored frequency of the burning voltage, the heating filament is acted upon by the filament (33) in one can be activated in the first operating mode and interrupted in a second operating mode.
Verwendung eines Verfahrens nach einem der Ansprüche 1 bis 4 oder einer Vorrichtung nach einem der Sprüchen 5 bis 7 oder einer Vorrichtung nach Ansprach 8 zum energiesparenden Betreiben einer T5 -Leuchtstoffröhre. Use of a method according to one of Claims 1 to 4 or a device according to one of Claims 5 to 7 or a device according to Claim 8 for the energy-saving operation of a T5 fluorescent tube.
EP02767133A 2001-09-04 2002-09-03 Method and device for operating a fluorescent tube in an energy saving manner Expired - Lifetime EP1425943B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20114623U 2001-09-04
DE20114623U DE20114623U1 (en) 2001-09-04 2001-09-04 Distal adapter for T5 fluorescent lamps with retrofit ECG
PCT/DE2002/003244 WO2003024162A1 (en) 2001-09-04 2002-09-03 Method and device for operating a fluorescent tube in an energy saving manner

Publications (2)

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EP1425943A1 true EP1425943A1 (en) 2004-06-09
EP1425943B1 EP1425943B1 (en) 2009-12-02

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EP02767133A Expired - Lifetime EP1425943B1 (en) 2001-09-04 2002-09-03 Method and device for operating a fluorescent tube in an energy saving manner

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US (1) US20050030750A1 (en)
EP (1) EP1425943B1 (en)
JP (1) JP2005502184A (en)
AT (1) ATE451004T1 (en)
CA (1) CA2459226A1 (en)
DE (4) DE20114623U1 (en)
ES (1) ES2337885T3 (en)
HU (1) HUP0401299A2 (en)
PL (1) PL374155A1 (en)
RU (1) RU2004110048A (en)
WO (1) WO2003024162A1 (en)

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US20050030750A1 (en) 2005-02-10
DE20220659U1 (en) 2003-12-18
PL374155A1 (en) 2005-10-03
JP2005502184A (en) 2005-01-20
HUP0401299A2 (en) 2005-03-29
ES2337885T3 (en) 2010-04-30
DE50214049D1 (en) 2010-01-14
DE20114623U1 (en) 2004-02-12
RU2004110048A (en) 2005-02-27
WO2003024162A1 (en) 2003-03-20
EP1425943B1 (en) 2009-12-02
DE10294173D2 (en) 2005-06-02
CA2459226A1 (en) 2003-03-20
ATE451004T1 (en) 2009-12-15

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