EP1377136A2 - Dispositif pour alimenter des lampes à décharge - Google Patents

Dispositif pour alimenter des lampes à décharge Download PDF

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Publication number
EP1377136A2
EP1377136A2 EP03012921A EP03012921A EP1377136A2 EP 1377136 A2 EP1377136 A2 EP 1377136A2 EP 03012921 A EP03012921 A EP 03012921A EP 03012921 A EP03012921 A EP 03012921A EP 1377136 A2 EP1377136 A2 EP 1377136A2
Authority
EP
European Patent Office
Prior art keywords
lamp
current
current control
series
parallel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP03012921A
Other languages
German (de)
English (en)
Other versions
EP1377136A3 (fr
Inventor
Harald Schmitt
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1377136A2 publication Critical patent/EP1377136A2/fr
Publication of EP1377136A3 publication Critical patent/EP1377136A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/16—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
    • H05B41/18—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 a starting switch
    • 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
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • 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
    • 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
    • H05B41/298—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2988—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions

Definitions

  • the present invention relates to a device for operating discharge lamps with a contact device for electrically connecting a discharge lamp which has two incandescent filaments and a current control device which is connected in parallel to the contact device for controlling the current through the two incandescent filaments.
  • the present invention relates to electronic ballasts in which such a device is integrated.
  • the operation of the discharge lamps includes both starting and burning them.
  • the load circuit is the load on a bridge that is used to operate a discharge lamp as an inverter.
  • Each load circuit has its own preheating arrangement for the respective lamp.
  • the primary coil of a heating transformer of the series connection of two lamps is connected in parallel and the secondary coil of the heating transformer is connected between the two lamps.
  • the circuitry implementation of the load circuits is relatively complex, since electronic control circuits with relay or transistor switches are required for the defined, sequential starting and subsequent joint operation of the lamps.
  • electronic control circuits with relay or transistor switches are required for the defined, sequential starting and subsequent joint operation of the lamps.
  • control circuits for operating individual lamps which only use passive components to control the preheating.
  • An essential component of such circuits is a heat-sensitive resistor with a positive temperature coefficient.
  • FIG. 1 a bridge circuit with a related load circuit is shown.
  • the bridge is implemented as a half-bridge with two switching elements 1 and 2 and two capacitors 3 and 4 for the purpose of inverter.
  • the load circuit 5 in the bridge comprises a coil 6 in series with a lamp 7, which is closed in parallel both with a resonance capacitor 8 and with a heat-sensitive resistor 9.
  • Suitable control of switches 1 and 2 generates an alternating voltage for the load circuit 5 in the center tap of the bridge from the direct voltage.
  • the frequency of the AC voltage is advantageously in the range of the resonance frequency of the coil 6 and the capacitor 8.
  • the resistor 9 detunes the series resonant circuit 6, 8 with a positive temperature coefficient (PTC) as a PTC thermistor in such a way that the necessary ignition voltage is applied the lamp 7 or the capacitor 8 is not reached.
  • PTC positive temperature coefficient
  • the PTC resistor 9 is designed in such a way that it also carries a sufficient amount of current after ignition to remain high-resistance so that the resonance can be maintained with the appropriate quality.
  • FIG. 2a shows a variant of the load circuit of Figure 2a.
  • a series capacitor 12 is connected in series with the PTC resistor 9. This has the effect that the detuning of the resonance circuit by the PTC resistor 9 is not as pronounced as in the case of the circuit in FIG. 2a. This means that the ignition voltage is reached faster in this case and the lamp consequently ignites more quickly.
  • FIG. 2c Another variant of the load circuits, which are shown in Figures 2a and 2b, is shown in Figure 2c.
  • the series capacitor 12 is primarily effective in the cold state of the PTC resistor 9, whereas in the warm state of the PTC resistor 9, ie during the operation and ignition of the lamp, the series connection of the two capacitors 8 and 9 is primarily effective ,
  • the object of the present invention is to propose an inexpensive preheating circuit for the operation of two lamps.
  • this object is achieved by a device for operating at least two discharge lamps with a first contact device for electrically connecting a first discharge lamp which has two first incandescent filaments and a first current control device which is connected in parallel to the first contact device for controlling the current the two first incandescent filaments, and a second contact device for electrically connecting a second discharge lamp, which has two second incandescent filaments, and a second current control device, which is connected in parallel to the second contact device, for controlling the current through the two second incandescent filaments, the first and second contact device are connected in series.
  • the advantage of the circuit according to the invention is that, compared to the preheating circuit for a lamp, the additional effort for preheating a second lamp is only in one component, namely a second PTC resistor.
  • a resonance capacitor is connected in parallel with the device according to the invention. This means that both lamps can be operated with a resonance circuit.
  • a resonance capacitor can also be connected in parallel to the first and / or second current control device.
  • the current control device advantageously comprises a PTC resistor with a positive temperature coefficient. This component enables a relatively simple and inexpensive control of the preheating for the lamps.
  • the first and / or second current control device can comprise a transistor. This allows preheating to be controlled more individually, but also more elaborately.
  • a series capacitor can be connected in series with the first or second current control device. This means that the resonance circuit is detuned less overall and the respective lamp is ignited earlier accordingly.
  • a sequence start capacitor can be provided in parallel with the first and / or second contact device.
  • the sequential starting sequence for at least two lamps can advantageously be controlled with this.
  • the PTC resistances of the first and the second current control devices (9, 9a) are designed with respect to one another in such a way that a sequence start of the first and second lamps (7, 7a) results. This enables a sequence start to be avoided in order to avoid overloading intermediate circuit capacitors in so-called energy return circuits (pump circuits) without additional components.
  • the device can preferably also be connected to a choke coil with which the device can be operated in resonance.
  • the device can thus be controlled by a single inverter for operating two or more lamps.
  • the device according to the invention is advantageously integrated into an electrical ballast for fluorescent lamps. This means that two or more lamps can be operated with one ballast.
  • a first current control device which is implemented as a PTC resistor, is connected in parallel with the first lamp 7 or first contact device 13, 14.
  • a second current control device 9a which is also designed as a heat-sensitive PTC resistor, is connected in parallel with the second lamp 7a or the second contact device 13a, 14a.
  • the two PTC resistors 9, 9a detune the load resonance circuit, the choke coil of which is not shown in the figure.
  • the two PTC resistors 9, 9a are low-resistance as PTC thermistors.
  • the lamps 7, 7a have not yet ignited and the current flowing through the lamps is used exclusively for heating the filaments. Since the resonance circuit is out of tune, the voltage across the individual lamps is not sufficient to ignite them.
  • the PTC resistance of the second lamp becomes even more high-resistance, so that finally enough voltage is also present at the second lamp. to ignite them.
  • the entire current essentially flows through them, while only a small proportion of the current flows through the parallel-connected PTC resistors 9, 9a to maintain the high impedance.
  • the sequential ignition of the lamps 7, 7a is necessary in order to limit the current through the individual components. However, if the sequential ignition of both lamps 7, 7a takes place in too rapid a sequence, the respective current peaks overlap in such a way that a maximum permissible current is exceeded, which leads to the device being switched off. It must therefore be ensured that the ignition of the two or more lamps takes place at a minimum time interval. If the two PTC resistors 9, 9a have the same dimensions, this is not readily the case. Therefore, a sequence start capacitor 15 is connected in parallel to the lamp 7a. The sequence start capacitor 15 causes the PTC resistor 9a to heat up more slowly than the PTC resistor 9 in the preheating phase.
  • the PTC resistor 9a remains low-resistance longer than the PTC resistor 9.
  • the lamp 7 thus ignites in front of the lamp 7a.
  • the time difference can be set in a defined manner by selecting the capacitance of the sequence start capacitor 15. In this way, excessively high charging current peaks for charging intermediate circuit capacitors in energy recovery circuits can also be avoided.
  • FIG. 3a shows a variant of the embodiment shown in FIG. 3a, in which both the current through the PTC resistor 9a and the current through the sequence start capacitor 15 contribute to preheating the filaments of the lamp 7a. This is achieved in that the PTC resistor 9a and the sequence start capacitor 15 are arranged on the same side of the contact devices 13a and 14a. This variant is preferred if an increased preheating current is desired.
  • FIG. 3b Another variant of the embodiment shown in Figure 3a is shown in Figure 3b.
  • a series capacitor 12 is connected in series with the PTC resistor 9. As already explained in connection with FIG. 2b, this causes both PTC resistors 9, 9a to reach their high impedance more quickly due to the increased current. If the lamp 7 ignites first, the increased current is no longer available for heating the PTC resistor 9a.
  • FIG. 3c Another variant of the device according to the invention for operating, i.e. for preheating, igniting and letting a lamp burn, is shown in FIG. 3c.
  • a series capacitor 12 or 12a is connected in series to both the PTC resistor 9 and the PTC resistor 9a. These have the effect that the increased heating current is also available for the lamp which will ignite later or its PTC resistor.
  • a sequence start capacitor 15 can also be provided in the embodiments according to FIGS. 3b and 3c in order to avoid impermissible charging current peaks.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
EP03012921A 2002-06-17 2003-06-06 Dispositif pour alimenter des lampes à décharge Withdrawn EP1377136A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10226899 2002-06-17
DE10226899A DE10226899A1 (de) 2002-06-17 2002-06-17 Vorrichtung zum Betreiben von Entladungslampen

Publications (2)

Publication Number Publication Date
EP1377136A2 true EP1377136A2 (fr) 2004-01-02
EP1377136A3 EP1377136A3 (fr) 2007-06-06

Family

ID=29594573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03012921A Withdrawn EP1377136A3 (fr) 2002-06-17 2003-06-06 Dispositif pour alimenter des lampes à décharge

Country Status (7)

Country Link
US (1) US6873122B2 (fr)
EP (1) EP1377136A3 (fr)
KR (1) KR20040002580A (fr)
CN (1) CN1471345A (fr)
CA (1) CA2432450A1 (fr)
DE (1) DE10226899A1 (fr)
TW (1) TW200403010A (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7474048B2 (en) 2005-06-01 2009-01-06 The Trustees Of Princeton University Fluorescent filtered electrophosphorescence
JP5337028B2 (ja) * 2006-06-30 2013-11-06 ノルディコ テクニカル サーヴィシズ リミテッド 装置
CN117730638A (zh) 2021-08-02 2024-03-19 默克专利有限公司 通过组合油墨进行的印刷方法
WO2023237458A1 (fr) 2022-06-07 2023-12-14 Merck Patent Gmbh Procédé d'impression d'une couche fonctionnelle d'un dispositif électronique par combinaison d'encres

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH543215A (de) * 1971-05-24 1973-10-15 Voegeli Ernst Vorschaltgerät für Gasentladungslampen
US3836817A (en) * 1973-01-10 1974-09-17 Lampes Sa Two-pole electronic starter for fluorescent lamps
DE3644788A1 (de) * 1986-12-31 1988-07-14 Erzmoneit Dorit Schaltungsanordnung zum betreiben von niederdruckentladungslampen im einzel- und tandembetrieb
US4847535A (en) * 1983-12-30 1989-07-11 Advance Transformer Co. Hybrid ballast for multiple discharge lamps
WO1991007070A1 (fr) * 1989-10-26 1991-05-16 Skyline Holding Ag Circuit de prechauffage pour lampes a fluorescence
EP0663789A1 (fr) * 1994-01-18 1995-07-19 Mass Technology (H.K.) Ltd. Circuit d'amorçage, avec préchauffage, de lampes fluorescentes
DE4421736A1 (de) * 1994-06-22 1996-01-04 Wolfgang Nuetzel Steuerung für Leuchtstofflampen
GB2301955A (en) * 1995-06-08 1996-12-18 Ultralite International Pty Li Pre-heat circuit for a discharge lamp
US5825139A (en) * 1995-11-02 1998-10-20 Hubbell Incorporated Lamp driven voltage transformation and ballasting system
DE10037563A1 (de) * 2000-08-02 2002-02-14 Horst Erzmoneit Schaltungsanordnung zum Betreiben von Niederdruckentladungslampen-Leuchtstofflampen, vorzüglich geeignet zum Umrüsten von Leuchten mit Drossel-Starter-Betrieb auf elektronische Vorschaltgeräte, ohne Umverdrahtung an den Fassungen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2224665A1 (de) * 1971-05-24 1972-12-07 Voegeli E Vorschaltgerät für Gasentladungslampen
US4081718A (en) * 1975-05-20 1978-03-28 Nec Sylvania Corporation Discharge lamp lighting device using a backswing booster
US4866350A (en) * 1988-04-04 1989-09-12 Usi Lighting, Inc. Fluorescent lamp system
JP2000158686A (ja) * 1998-12-01 2000-06-13 Fuji Photo Film Co Ltd 光源制御装置
US6518707B2 (en) * 2001-06-22 2003-02-11 Dg Partnership An Illinois General Partnership Voltage detector for series light circuit

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH543215A (de) * 1971-05-24 1973-10-15 Voegeli Ernst Vorschaltgerät für Gasentladungslampen
US3836817A (en) * 1973-01-10 1974-09-17 Lampes Sa Two-pole electronic starter for fluorescent lamps
US4847535A (en) * 1983-12-30 1989-07-11 Advance Transformer Co. Hybrid ballast for multiple discharge lamps
DE3644788A1 (de) * 1986-12-31 1988-07-14 Erzmoneit Dorit Schaltungsanordnung zum betreiben von niederdruckentladungslampen im einzel- und tandembetrieb
WO1991007070A1 (fr) * 1989-10-26 1991-05-16 Skyline Holding Ag Circuit de prechauffage pour lampes a fluorescence
EP0663789A1 (fr) * 1994-01-18 1995-07-19 Mass Technology (H.K.) Ltd. Circuit d'amorçage, avec préchauffage, de lampes fluorescentes
DE4421736A1 (de) * 1994-06-22 1996-01-04 Wolfgang Nuetzel Steuerung für Leuchtstofflampen
GB2301955A (en) * 1995-06-08 1996-12-18 Ultralite International Pty Li Pre-heat circuit for a discharge lamp
US5825139A (en) * 1995-11-02 1998-10-20 Hubbell Incorporated Lamp driven voltage transformation and ballasting system
DE10037563A1 (de) * 2000-08-02 2002-02-14 Horst Erzmoneit Schaltungsanordnung zum Betreiben von Niederdruckentladungslampen-Leuchtstofflampen, vorzüglich geeignet zum Umrüsten von Leuchten mit Drossel-Starter-Betrieb auf elektronische Vorschaltgeräte, ohne Umverdrahtung an den Fassungen

Also Published As

Publication number Publication date
US20030230989A1 (en) 2003-12-18
US6873122B2 (en) 2005-03-29
DE10226899A1 (de) 2003-12-24
CN1471345A (zh) 2004-01-28
TW200403010A (en) 2004-02-16
CA2432450A1 (fr) 2003-12-17
KR20040002580A (ko) 2004-01-07
EP1377136A3 (fr) 2007-06-06

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