EP0875129B1 - Vorrichtung zum betreiben einer gasentladungslampe - Google Patents
Vorrichtung zum betreiben einer gasentladungslampe Download PDFInfo
- Publication number
- EP0875129B1 EP0875129B1 EP97947024A EP97947024A EP0875129B1 EP 0875129 B1 EP0875129 B1 EP 0875129B1 EP 97947024 A EP97947024 A EP 97947024A EP 97947024 A EP97947024 A EP 97947024A EP 0875129 B1 EP0875129 B1 EP 0875129B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- discharge lamp
- gas discharge
- output
- potential
- reference 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.)
- Expired - Lifetime
Links
Images
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 is based on a device for operation a gas discharge lamp of the genus Main claim.
- DE-OS 42 18 647 is one High-voltage discharge lamp device known.
- the output voltage of the step-up to DC converter the high-voltage discharge lamp with alternating switched polarities supplied.
- the Gas discharge lamp is therefore at a voltage that rectangular between the positive and negative value of the Alternating output voltage of the DC-DC converter.
- a constant frequency of polarity reversal is thus an average of the gas discharge lamp applied voltage, which corresponds to the reference potential. If the gas discharge lamp is housed in a housing, that also lies on this reference potential arises no potential difference, the harmful Prevents ion migration in the lamp.
- DE-PS 41 41 804 is used to generate a Potential difference between the gas discharge lamp and the environment a part provided that compared to a Gas discharge lamp is placed positive potential. This Arrangement is however with additional manufacturing technology Associated effort.
- the invention has for its object a device to operate a gas discharge lamp, the one enables long life of the gas discharge lamp.
- a DC-DC converter converts one to one Reference potential related input voltage in two from Reference potential different output potentials around, which are characterized in that their amounts differ in size are.
- Such a bipolar DC converter has some specific advantages, for example in it exist that due to cheaper stress distributions Accept the requirements for the electronic components. So circuit breakers or diodes can be lower Use dielectric strength. It also poses with alternate activation of the gas discharge lamp a medium potential with the two output potentials one that deviates from the reference potential. The so The resulting potential difference has a positive effect on the life of the gas discharge lamp than it Interactions of the gas ions with the lamp body reduced. Ion diffusions in the lamp body can be to reduce.
- a expedient improvement provides that a first Output voltage that the first output potential on the Reference potential relates, has different polarity like a second output voltage which is the second Output potential refers to the reference potential. At constant alternating control of the Gas discharge lamp turns a medium Output voltage whose value is from the reference potential is different.
- the Gas discharge lamp is housed in a housing, whose potential is at the reference potential. Between the Housing and the gas discharge lamp is thus a Potential difference built up, which - as already explained - Ion migration reduced.
- the gas discharge lamp is preferably used in one Headlights of a motor vehicle.
- FIG. 1 shows a block diagram of a Embodiment and Figure 2 a typical Voltage curve on a gas discharge lamp.
- An input voltage 11 related to a reference potential 12 is converted into two by a DC-DC converter 10 Output potentials converted to a first Output terminal 21 and a second output terminal 22 can be tapped. Becomes the first output potential tapped at the first output terminal 21 and on the Reference potential 12 referred, so you get the first Output voltage 23, which at the second output terminal 22nd tapped second output potential on the Reference potential 12 relates to the second Output voltage 24.
- the two output potentials are a control circuit 15 supplied, which in turn a Gas discharge lamp 16 supplied.
- the time course of a lamp voltage 26 as it changes could set on the gas discharge lamp 16 fluctuates in constant intervals between the first Output voltage 23 and the second output voltage 24. This results in an average value 25 of this lamp voltage 26 a.
- the device according to the invention for operating a Gas discharge lamp 16 works as follows:
- the DC-DC converter 10 converts to that Reference potential 12 related input voltage 11 in a bipolar output voltage around. Serves as input voltage 11 for example one taken from a battery DC voltage.
- a bipolar DC voltage converter 10 in this context a DC-DC converter 10 understood who referred to the reference potential 12 Converts input voltage 11 into two output potentials, which are different from the reference potential 12.
- Such DC voltage converter 10 are from the relevant Technical literature known.
- Single-ended flyback converter or single-ended forward converter can be used as well for example push-pull converters, in which one transformer isolation is carried out.
- isolation could be a second from Reference potential 12 different output potential too can be achieved in that the flowing on the primary side Current of the transformer through a diode and one Smoothing capacitor of the first output terminal 21 while the current flowing on the secondary side of the second Output terminal 22 is supplied.
- Output potentials form the input variables of the Control circuit 15. This ensures that the Gas discharge lamp 16 is supplied with an alternating current, since in DC the life of the gas discharge lamp 16 strong would be affected.
- the control circuit 15 can consist of an H-bridge, for example The gas discharge lamp 16 lies diagonally. By suitable Control of the four circuit breakers is always alternately the first and the second output potential the connections of the gas discharge lamp 16 are laid. The timing in the exemplary embodiment is the same. Then ensures that a mean value 25 arises, the Potential is different from the reference potential 12. Likewise a clocked pole reversal is conceivable.
- the control circuit 15 effects a rectangular shape Course of the lamp voltage 26 according to Figure 2.
- the first and second output voltage 23, 24 are alternating with the same period of time on the gas discharge lamp 16.
- the Mean 25 could also be different Duration of the activation with respect to the first and second Realize output potential. However, this increases the Control effort.
- the gas discharge lamp 16 can be used in particular Use motor vehicles. Will the lamp holder or that Housing of the gas discharge lamp 16 to the device mass the desired potential difference is created. The negative mean value 25 related to the device mass prevents unwanted ion migration.
Landscapes
- Circuit Arrangements For Discharge Lamps (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Description
Claims (4)
- Vorrichtung zum Betreiben einer Gasentladungslampe (16), mit einem Gleichspannungswandler (10), der eine auf ein Bezugspotential (12) bezogene Eingangsspannung (11) in zumindest zwei vom Bezugspotential (12) verschiedene Ausgangspotentiale umwandelt, wobei die Gasentladungslampe (16) über eine Ansteuerschaltung (15) auf diese Ausgangspotentiale gebracht ist, dadurch gekennzeichnet, daß die Beträge der beiden Ausgangspotentiale unterschiedlich groß sind.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß eine erste Ausgangsspannung (23), die das erste Ausgangspotential auf das Bezugspotential (12) bezieht, unterschiedliche Polarität besitzt wie eine zweite Ausgangsspannung (24), die das zweite Ausgangspotential auf das Bezugspotential (12) bezieht.
- Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Gasentladungslampe (16) in einem Gehäuse untergebracht ist, dessen Potential auf dem Bezugspotential (12) liegt.
- Verwendung der Vorrichtung nach einem der vorhergehenden Ansprüche in einem Scheinwerfer eines Kraftfahrzeugs.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19646861A DE19646861C1 (de) | 1996-11-13 | 1996-11-13 | Vorrichtung zum Betreiben einer Gasentladungslampe |
DE19646861 | 1996-11-13 | ||
PCT/DE1997/002486 WO1998021920A1 (de) | 1996-11-13 | 1997-10-25 | Vorrichtung zum betreiben einer gasentladungslampe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0875129A1 EP0875129A1 (de) | 1998-11-04 |
EP0875129B1 true EP0875129B1 (de) | 2000-01-12 |
Family
ID=7811526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97947024A Expired - Lifetime EP0875129B1 (de) | 1996-11-13 | 1997-10-25 | Vorrichtung zum betreiben einer gasentladungslampe |
Country Status (7)
Country | Link |
---|---|
US (1) | US6078149A (de) |
EP (1) | EP0875129B1 (de) |
JP (1) | JP2000503469A (de) |
KR (1) | KR19990077118A (de) |
DE (2) | DE19646861C1 (de) |
ES (1) | ES2142692T3 (de) |
WO (1) | WO1998021920A1 (de) |
Families Citing this family (3)
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)
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 (de) * | 1988-09-23 | 1990-03-28 | Siemens Aktiengesellschaft | Verfahren und Vorrichtung zum Betreiben mindestens einer Gasentladungslampe |
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 (de) * | 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 |
-
1996
- 1996-11-13 DE DE19646861A patent/DE19646861C1/de not_active Expired - Fee Related
-
1997
- 1997-10-25 KR KR1019980705254A patent/KR19990077118A/ko not_active Application Discontinuation
- 1997-10-25 EP EP97947024A patent/EP0875129B1/de not_active Expired - Lifetime
- 1997-10-25 JP JP10522021A patent/JP2000503469A/ja active Pending
- 1997-10-25 DE DE59701000T patent/DE59701000D1/de not_active Expired - Fee Related
- 1997-10-25 WO PCT/DE1997/002486 patent/WO1998021920A1/de not_active Application Discontinuation
- 1997-10-25 ES ES97947024T patent/ES2142692T3/es not_active Expired - Lifetime
- 1997-10-25 US US09/101,596 patent/US6078149A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ES2142692T3 (es) | 2000-04-16 |
US6078149A (en) | 2000-06-20 |
KR19990077118A (ko) | 1999-10-25 |
DE59701000D1 (de) | 2000-02-17 |
JP2000503469A (ja) | 2000-03-21 |
DE19646861C1 (de) | 1998-04-16 |
EP0875129A1 (de) | 1998-11-04 |
WO1998021920A1 (de) | 1998-05-22 |
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