EP0875129A1 - Lampe luminescente a gaz - Google Patents

Lampe luminescente a gaz

Info

Publication number
EP0875129A1
EP0875129A1 EP97947024A EP97947024A EP0875129A1 EP 0875129 A1 EP0875129 A1 EP 0875129A1 EP 97947024 A EP97947024 A EP 97947024A EP 97947024 A EP97947024 A EP 97947024A EP 0875129 A1 EP0875129 A1 EP 0875129A1
Authority
EP
European Patent Office
Prior art keywords
discharge lamp
gas discharge
output
voltage
potential
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
EP97947024A
Other languages
German (de)
English (en)
Other versions
EP0875129B1 (fr
Inventor
Karl-Heinrich Preis
Robert Kern
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0875129A1 publication Critical patent/EP0875129A1/fr
Application granted granted Critical
Publication of EP0875129B1 publication Critical patent/EP0875129B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • H05B41/288—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 without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure mercury or sodium lamps or low-pressure sodium lamps
    • H05B41/292—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2928—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the lamp against abnormal operating conditions
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S315/00—Electric lamp and discharge devices: systems
    • Y10S315/07—Starting and control circuits for gas discharge lamp using transistors

Definitions

  • the invention relates to a device for operating a gas discharge lamp according to the preamble of the main claim. From DE-OS 42 18 647 is one
  • High-voltage discharge lamp device known.
  • the output voltage of the step-up direct voltage converter is fed to the high-voltage discharge lamp with alternately switched polarities.
  • a voltage is thus present at the gas discharge lamp, which alternates in a rectangular shape between the positive and negative values of the output voltage of the DC-DC converter.
  • With a constant frequency of the polarity reversal an average value of the voltage applied to the gas discharge lamp is obtained, which corresponds to the reference potential. If the gas discharge lamp is accommodated in a housing, which is also at this reference potential, there is no potential difference which prevents harmful ion migration in the lamp.
  • DE-PS 41 41 804 is to generate a potential difference between the gas discharge lamp and the environment a part is provided which is set to a potential which is positive in comparison with the gas discharge lamp. However, this arrangement is associated with additional manufacturing outlay.
  • the invention has for its object to provide a device for operating a gas discharge lamp, which enables a long service life of the gas discharge lamp.
  • a DC-DC converter converts one to one
  • Reference potential related input voltage into two different from the reference potential output potentials which are characterized in that their amounts are different in size.
  • Such a bipolar DC-DC converter has some specific advantages, which consist, for example, in the fact that the demands on the electronic components decrease due to more favorable voltage distributions. Circuit breakers or diodes with lower dielectric strength can be used.
  • an average potential arises which deviates from the reference potential.
  • the potential difference that arises in this way has a positive effect on the life of the gas discharge lamp in that it reduces interactions of the gas ions with the lamp body. Ion diffusions in the lamp body can be reduced.
  • a expedient improvement provides that a first output voltage, which relates the first output potential to the reference potential, has different polarity than a second output voltage, which relates the second output potential to the reference potential. If the gas discharge lamp is actuated alternately for the same time, an average output voltage is set, the value of which differs from the reference potential.
  • the gas discharge lamp is housed in a housing, the potential of which is at the reference potential. A potential difference is thus built up between the housing and the gas discharge lamp, which - as already explained - reduces ion migration.
  • the gas discharge lamp is preferably used in a headlight of a motor vehicle.
  • FIG. 1 shows a block diagram of an exemplary embodiment and FIG. 2 shows a typical voltage curve on a gas discharge lamp.
  • An input voltage 11 related to a reference potential 12 is converted by a DC-DC converter 10 into two output potentials, which can be tapped at a first output terminal 21 and at a second output terminal 22. If the first output potential is tapped at the first output terminal 21 and referred to the reference potential 12, the first output voltage 23 is obtained, and the second output potential tapped at the second output terminal 22 is obtained The second output voltage 24 results in reference potential 12.
  • the two output potentials are supplied to an circuit 15, which in turn supplies a gas discharge lamp 16.
  • the device according to the invention for operating a gas discharge lamp 16 works as follows:
  • the DC voltage converter 10 converts the input voltage 11 related to the reference potential 12 into a bipolar output voltage.
  • a DC voltage taken from a battery is used as input voltage 11, for example.
  • a bipolar DC voltage converter 10 is understood to be a DC voltage converter 10 which converts the input voltage 11 related to the reference potential 12 into two output potentials which are different from the reference potential 12.
  • Such DC-DC converters 10 are from the relevant
  • Single-ended flyback converters or single-ended forward converters can also be used, such as push-pull converters, in which a transformer is isolated.
  • a second output potential different from the reference potential 12 could also be achieved in that the current flowing on the primary side of the transformer via a diode and a smoothing capacitor of the first output terminal 21 while the current flowing on the secondary side is supplied to the second output terminal 22.
  • control circuit 15 can consist, for example, of an H-bridge in the
  • the gas discharge lamp 16 lies diagonally.
  • the first and the second output potential are always applied alternately to the connections of the gas discharge lamp 16 by suitable control of the four power switches.
  • the clocking in the exemplary embodiment is constant. Then it is ensured that an average value 25 is set, the potential of which is different from the reference potential 12.
  • a clocked polarity reversal circuit is also conceivable.
  • the control circuit 15 causes a rectangular
  • the first and second output voltages 23, 24 are alternately applied to the gas discharge lamp 16 with the same duration.
  • the average value 25 could also be realized by different time periods of the activation with respect to the first and second output potential. However, this increases the effort for the control.
  • the gas discharge lamp 16 can be used in particular in motor vehicles. If the lamp holder or the housing of the gas discharge lamp 16 is placed on the device ground, the desired potential difference arises.
  • the negative mean value 25 based on the device mass prevents the undesired ion migration.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

La présente invention concerne un dispositif pour faire marcher une lampe luminescente à gaz (16), comprenant un convertisseur continu-continu (10) qui transforme une tension à l'entrée (11) correspondant au potentiel de référence (12) en deux potentiels à la sortie différents du potentiel de référence (12). La lampe luminescente à gaz (16) est mise, par l'intermédiaire d'un circuit d'activation (15), sur ces potentiels à la sortie qui sont de valeur différenciée.
EP97947024A 1996-11-13 1997-10-25 Lampe luminescente a gaz Expired - Lifetime EP0875129B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19646861 1996-11-13
DE19646861A DE19646861C1 (de) 1996-11-13 1996-11-13 Vorrichtung zum Betreiben einer Gasentladungslampe
PCT/DE1997/002486 WO1998021920A1 (fr) 1996-11-13 1997-10-25 Lampe luminescente a gaz

Publications (2)

Publication Number Publication Date
EP0875129A1 true EP0875129A1 (fr) 1998-11-04
EP0875129B1 EP0875129B1 (fr) 2000-01-12

Family

ID=7811526

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97947024A Expired - Lifetime EP0875129B1 (fr) 1996-11-13 1997-10-25 Lampe luminescente a gaz

Country Status (7)

Country Link
US (1) US6078149A (fr)
EP (1) EP0875129B1 (fr)
JP (1) JP2000503469A (fr)
KR (1) KR19990077118A (fr)
DE (2) DE19646861C1 (fr)
ES (1) ES2142692T3 (fr)
WO (1) WO1998021920A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100674423B1 (ko) * 2001-01-19 2007-01-29 엘지전자 주식회사 송/수신 시스템 및 데이터 처리 방법
GB2372646B (en) * 2001-02-26 2005-06-22 Cambridge Consultants Electronic circuits
DE102008025748A1 (de) 2008-05-29 2009-12-03 Automotive Lighting Reutlingen Gmbh Elektrische Schaltungsanordnung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5010279A (en) * 1985-08-26 1991-04-23 Lathom Michael S Switched capacitive ballasts for discharge lamps
EP0359860A1 (fr) * 1988-09-23 1990-03-28 Siemens Aktiengesellschaft Dispositif et procédé de mise en oeuvre d'au moins une lampe à décharge
JP2587720B2 (ja) * 1990-10-19 1997-03-05 株式会社小糸製作所 車輌用放電灯の点灯回路
DE4141804C1 (fr) * 1991-12-18 1993-02-25 Robert Bosch Gmbh, 7000 Stuttgart, De
DE4218647A1 (de) * 1992-01-27 1993-08-12 Mitsubishi Electric Corp Hochspannungs-entladungslampeneinrichtung
JP2875129B2 (ja) * 1993-01-05 1999-03-24 三菱電機株式会社 車両用放電灯点灯装置
JP2879514B2 (ja) * 1993-01-07 1999-04-05 株式会社小糸製作所 車輌用放電灯の点灯回路
JP3244859B2 (ja) * 1993-04-12 2002-01-07 池田デンソー株式会社 放電灯点灯装置
JP3224948B2 (ja) * 1994-08-30 2001-11-05 株式会社小糸製作所 放電灯の点灯回路

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9821920A1 *

Also Published As

Publication number Publication date
DE59701000D1 (de) 2000-02-17
KR19990077118A (ko) 1999-10-25
US6078149A (en) 2000-06-20
ES2142692T3 (es) 2000-04-16
DE19646861C1 (de) 1998-04-16
EP0875129B1 (fr) 2000-01-12
JP2000503469A (ja) 2000-03-21
WO1998021920A1 (fr) 1998-05-22

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