WO2005112074A2 - Hochdruckentladungslampe - Google Patents
Hochdruckentladungslampe Download PDFInfo
- Publication number
- WO2005112074A2 WO2005112074A2 PCT/DE2005/000792 DE2005000792W WO2005112074A2 WO 2005112074 A2 WO2005112074 A2 WO 2005112074A2 DE 2005000792 W DE2005000792 W DE 2005000792W WO 2005112074 A2 WO2005112074 A2 WO 2005112074A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure discharge
- discharge lamp
- discharge
- electrodes
- electrode
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/366—Seals for leading-in conductors
- H01J61/368—Pinched seals or analogous seals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/125—Selection of substances for gas fillings; Specified operating pressure or temperature having an halogenide as principal component
Definitions
- the invention relates to a high-pressure discharge lamp according to the preamble of patent claim 1.
- Such a high-pressure discharge lamp is described, for example, in published patent application EP 0 786 791 A1.
- This laid-open publication discloses a high-pressure discharge lamp for a motor vehicle headlight which is capped on one side.
- the high-pressure discharge lamp has a discharge vessel made of quartz glass, which is sealed at two diametrically arranged ends by means of a molybdenum foil in each case.
- the molybdenum foils are each connected to an electrode which protrude into the interior of the discharge vessel.
- High-pressure discharge lamps for motor vehicle headlights are usually designed as metal halide high-pressure discharge lamps with an electrical power consumption of less than 100 watts, the ionizable filling of which contains, in addition to xenon, halides of sodium and scandium.
- the molybdenum foils embedded in the sealed ends of the discharge vessel are exposed to high thermal stress during lamp operation, and the molybdenum foil area in the discharge-side area connected to the electrode causes the molybdenum foil to lift off from the quartz glass and to crack in the glass and thus prematurely Failure of the lamp.
- This problem occurs in particular in the case of mercury-free metal-halide high-pressure discharge lamps, the molybdenum foils of which are exposed to an even greater thermal load than the molybdenum foils of the conventional metal-halide high-pressure discharge lamps containing mercury due to the comparatively higher lamp current and the comparatively thicker electrodes.
- the high-pressure discharge lamp according to the invention for vehicle headlights with a power consumption of less than 100 watts has a quartz glass discharge vessel which has two opposite ends sealed by means of molybdenum foils, two electrodes in the interior of the discharge vessel, each of which is connected to one of the molybdenum foils, and a xenon as well as halides of sodium and scandium containing ionizable filling for generating a gas discharge, and is characterized by the fact that the smallest distance of the respective molybdenum foil to the end of the electrode connected to it projecting into the interior of the discharge vessel is more than 5 mm is.
- the thermal load on the molybdenum foil region connected to the electrode is reduced to a sufficient extent in order to reduce the problem described above.
- Electrode reduces the thermal load on the discharge-side end of the molybdenum foils by approx. 15%, thereby extending the life of the lamps by approx. 50%.
- the invention can be applied particularly advantageously to high-pressure discharge lamps, the electrodes of which, during lamp operation, are measurements cause a comparatively high heat transfer to the molybdenum foils, such as mercury-free metal halide high-pressure discharge lamps, the electrodes of which have a comparatively large thickness or a comparatively large diameter in the range from 0.25 mm to 0.45 mm.
- the minimum distance between the molybdenum foil in the case of mercury-free metal halide high-pressure discharge lamps and the end of the connected protruding into the interior of the discharge vessel Electrode preferably at most 8 mm.
- FIG. 1 shows a side view of a high-pressure discharge lamp according to the preferred exemplary embodiment in a schematic illustration
- FIG 2 The discharge vessel of the high-pressure discharge lamp shown in Figure 1 with dimensions for the electrodes and molybdenum foils
- the preferred exemplary embodiment of the invention is a mercury-free metal halide high-pressure discharge lamp with an electrical power consumption of approximately 35 watts.
- This lamp is intended for use in a vehicle headlight. It has a two-sided sealed discharge vessel 30 made of quartz glass with a volume of 24 mm 3 , in which an ionizable filling is enclosed gas-tight.
- the inner contour of the discharge vessel 30 is circular-cylindrical and its outer contour is ellipsoidal.
- the inside diameter of the discharge space 106 is 2.6 mm and its outside diameter is 6.3 mm.
- the two ends 101, 102 of the discharge vessel 10 are each sealed by means of a molybdenum foil 103, 104 melted or squeezed therein.
- the molybdenum foils 103, 104 each have a length of 6.5 mm, a width of 2 mm and a thickness of 25 ⁇ m.
- the electrodes 11, 12 consist of tungsten. Their thickness or diameter is 0.30 mm.
- the length of the electrodes 11, 12 is 7.5 mm in each case.
- the distance between the electrodes 11, 12 is 4.1 mm.
- the electrodes 11, 12 are each electrically conductively connected to an electrical connection of the lamp base 15, which essentially consists of plastic, via one of the molybdenum foils 103, 104 and via the current supply line 13 remote from the base or via the current return 14 on the rear side.
- the overlap B between the electrode 11 and the molybdenum foil 103 connected to it is 1.3 mm ⁇ 0.15 mm.
- the smallest distance A of the molybdenum foil 103 from the end of the electrode 11 projecting into the interior of the discharge vessel 10 is 6.2 mm ⁇ 0.15 mm. This means that the distance between the molybdenum foil 11 and the discharge arc which forms in the discharge vessel 10 during lamp operation is 6.2 mm ⁇ 0.15 mm.
- the smallest distance between the molybdenum foil 104 and the end of the electrode 12 projecting into the interior of the discharge vessel 10 is likewise 6.2 mm ⁇ 0.15 mm, because the discharge vessel 10 with the electrodes 11, 12 and the sealed ends 101, 102 is essentially mirror-symmetrical to a mirror axis running through the center of the discharge vessel and oriented perpendicular to the longitudinal axis of the discharge vessel 10.
- the maximum temperature load on the molybdenum foils 103, 104 could be less than 475 ° C can be limited.
- the discharge vessel 10 is enveloped by an outer bulb 16, which consists of Quartz glass or tempered glass.
- the quartz glass or hard glass of the outer bulb 16 is provided with the usual UV-absorbing additives.
- the outer bulb 16 has an extension 161 anchored in the base 15.
- the outer diameter of the outer bulb 16 is 9 mm and its wall thickness is 0.9 mm.
- the discharge vessel 10 has a tubular extension 105 made of quartz glass on the base side, in which the power supply 14 on the base side runs.
- the electrodes 11, 12, the molybdenum foils 103, 104 and / or current leads 13, 14 can be coated with ruthenium in the region of the sealed ends 101, 102 of the discharge vessel 10.
- the ionizable filling enclosed in the discharge vessel consists of xenon with a cold filling pressure of 11,800 hPa, 0.25 mg sodium iodide, 0.18 mg scandium iodide, 0.03 mg zinc iodide and 0.0024 mg indium iodide.
- the operating voltage U of the lamp is 45 volts.
- the invention is not limited to the exemplary embodiment explained in more detail above, but can also be used, for example, on mercury-containing metal halide high-pressure discharge lamps for vehicle headlights, the electrodes of which have a smaller diameter of approximately 0.239 mm.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/596,075 US20070222387A1 (en) | 2004-05-13 | 2005-04-29 | High-Pressure Discharge Lamp |
EP05749222.5A EP1754245B1 (de) | 2004-05-13 | 2005-04-29 | Hochdruckentladungslampe |
JP2007511845A JP2007537564A (ja) | 2004-05-13 | 2005-04-29 | 高圧放電ランプ |
CA002566035A CA2566035A1 (en) | 2004-05-13 | 2005-04-29 | High-pressure discharge lamp |
CN2005800151104A CN101036214B (zh) | 2004-05-13 | 2005-04-29 | 高压放电灯 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004024063.9 | 2004-05-13 | ||
DE102004024063A DE102004024063A1 (de) | 2004-05-13 | 2004-05-13 | Hochdruckentladungslampe |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2005112074A2 true WO2005112074A2 (de) | 2005-11-24 |
WO2005112074A3 WO2005112074A3 (de) | 2007-04-19 |
Family
ID=35267468
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2005/000792 WO2005112074A2 (de) | 2004-05-13 | 2005-04-29 | Hochdruckentladungslampe |
Country Status (7)
Country | Link |
---|---|
US (1) | US20070222387A1 (de) |
EP (1) | EP1754245B1 (de) |
JP (1) | JP2007537564A (de) |
CN (1) | CN101036214B (de) |
CA (1) | CA2566035A1 (de) |
DE (1) | DE102004024063A1 (de) |
WO (1) | WO2005112074A2 (de) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007018614A1 (de) | 2007-04-19 | 2008-10-23 | Osram Gesellschaft mit beschränkter Haftung | Hochdruckentladungslampe und Fahrzeugscheinwerfer mit Hochdruckentladungslampe |
WO2008142643A2 (en) * | 2007-05-24 | 2008-11-27 | Philips Intellectual Property & Standards Gmbh | Lamp and headlight unit for a motor vehicle |
DE102007043165A1 (de) | 2007-09-11 | 2009-03-12 | Osram Gesellschaft mit beschränkter Haftung | Hochdruckentladungslampe und Fahrzeugscheinwerfer mit Hochdruckentladungslampe |
DE102008014096A1 (de) | 2008-03-05 | 2009-09-10 | Osram Gesellschaft mit beschränkter Haftung | Wolframelektrode für Hochdruckentladungslampen und Hochdruckentladungslampe mit einer Wolframelektrode |
EP2128888A2 (de) | 2008-03-11 | 2009-12-02 | Blv Licht- Und Vakuumtechnik Gmbh | Quecksilberfreie Metallhalogenid-Hochdruckentladungslampe |
DE102008026521A1 (de) | 2008-06-03 | 2009-12-10 | Osram Gesellschaft mit beschränkter Haftung | Thoriumfreie Hochdruckentladungslampe für Hochfrequenzbetrieb |
DE102013223708A1 (de) | 2013-11-20 | 2015-05-21 | Osram Gmbh | Hochdruckentladungslampe für Kraftfahrzeugscheinwerfer |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009127993A1 (en) * | 2008-04-14 | 2009-10-22 | Philips Intellectual Property & Standards Gmbh | High efficiency discharge lamp |
CN102714128B (zh) * | 2010-01-28 | 2016-04-20 | 皇家飞利浦电子股份有限公司 | 具有减小高度的燃烧器和制造燃烧器的方法 |
CN104183466A (zh) * | 2013-05-28 | 2014-12-03 | 海洋王照明科技股份有限公司 | 陶瓷金卤灯 |
JP2017098009A (ja) * | 2015-11-20 | 2017-06-01 | 東芝ライテック株式会社 | 放電ランプ |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0400980A2 (de) * | 1989-05-31 | 1990-12-05 | Iwasaki Electric Co., Ltd. | Metallhalogenidlampe |
EP0883160A1 (de) * | 1997-06-06 | 1998-12-09 | Toshiba Lighting & Technology Corporation | Quecksilberfreie Metallhalogenid-Entladungslampe, Spannungsversorgung für eine solche Lampe, sowie Beleuchtungseinrichtung mit einer solchen Lampe |
EP1037256A1 (de) * | 1999-03-16 | 2000-09-20 | Matsushita Electronics Corporation | Metallhalogenidlampe |
US20030178940A1 (en) * | 2001-03-30 | 2003-09-25 | Masato Yoshida | Metal halide lamp for automobile headlight |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19731168A1 (de) * | 1997-07-21 | 1999-01-28 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Beleuchtungssystem |
JP2003282021A (ja) * | 2002-03-25 | 2003-10-03 | Toshiba Lighting & Technology Corp | 高圧放電ランプ、ランプ用石英ガラスバルブの製造方法および照明装置 |
-
2004
- 2004-05-13 DE DE102004024063A patent/DE102004024063A1/de not_active Withdrawn
-
2005
- 2005-04-29 CA CA002566035A patent/CA2566035A1/en not_active Abandoned
- 2005-04-29 US US11/596,075 patent/US20070222387A1/en not_active Abandoned
- 2005-04-29 EP EP05749222.5A patent/EP1754245B1/de not_active Not-in-force
- 2005-04-29 JP JP2007511845A patent/JP2007537564A/ja active Pending
- 2005-04-29 CN CN2005800151104A patent/CN101036214B/zh not_active Expired - Fee Related
- 2005-04-29 WO PCT/DE2005/000792 patent/WO2005112074A2/de active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0400980A2 (de) * | 1989-05-31 | 1990-12-05 | Iwasaki Electric Co., Ltd. | Metallhalogenidlampe |
EP0883160A1 (de) * | 1997-06-06 | 1998-12-09 | Toshiba Lighting & Technology Corporation | Quecksilberfreie Metallhalogenid-Entladungslampe, Spannungsversorgung für eine solche Lampe, sowie Beleuchtungseinrichtung mit einer solchen Lampe |
EP1274118A2 (de) * | 1997-06-06 | 2003-01-08 | Toshiba Lighting & Technology Corporation | Quecksilberfreie Metallhalogenid-Entladungslampe, Spannungsversorgung für eine solche Lampe, sowie Beleuchtungseinrichtung mit einer solchen Lampe |
EP1037256A1 (de) * | 1999-03-16 | 2000-09-20 | Matsushita Electronics Corporation | Metallhalogenidlampe |
US20030178940A1 (en) * | 2001-03-30 | 2003-09-25 | Masato Yoshida | Metal halide lamp for automobile headlight |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007018614A1 (de) | 2007-04-19 | 2008-10-23 | Osram Gesellschaft mit beschränkter Haftung | Hochdruckentladungslampe und Fahrzeugscheinwerfer mit Hochdruckentladungslampe |
JP2010525505A (ja) * | 2007-04-19 | 2010-07-22 | オスラム ゲゼルシャフト ミット ベシュレンクテル ハフツング | 高圧放電灯および高圧放電灯を備えた車両ヘッドランプ |
US8310156B2 (en) | 2007-04-19 | 2012-11-13 | Osram Ag | High-pressure discharge lamp and vehicle headlight with high-pressure discharge lamp |
WO2008142643A2 (en) * | 2007-05-24 | 2008-11-27 | Philips Intellectual Property & Standards Gmbh | Lamp and headlight unit for a motor vehicle |
WO2008142643A3 (en) * | 2007-05-24 | 2009-05-28 | Philips Intellectual Property | Lamp and headlight unit for a motor vehicle |
DE102007043165A1 (de) | 2007-09-11 | 2009-03-12 | Osram Gesellschaft mit beschränkter Haftung | Hochdruckentladungslampe und Fahrzeugscheinwerfer mit Hochdruckentladungslampe |
DE102008014096A1 (de) | 2008-03-05 | 2009-09-10 | Osram Gesellschaft mit beschränkter Haftung | Wolframelektrode für Hochdruckentladungslampen und Hochdruckentladungslampe mit einer Wolframelektrode |
EP2128888A2 (de) | 2008-03-11 | 2009-12-02 | Blv Licht- Und Vakuumtechnik Gmbh | Quecksilberfreie Metallhalogenid-Hochdruckentladungslampe |
DE102008013607B3 (de) * | 2008-03-11 | 2010-02-04 | Blv Licht- Und Vakuumtechnik Gmbh | Quecksilberfreie Metallhalogenid-Hochdruckentladungslampe |
EP2128888A3 (de) * | 2008-03-11 | 2010-06-30 | Blv Licht- Und Vakuumtechnik Gmbh | Quecksilberfreie Metallhalogenid-Hochdruckentladungslampe |
DE102008026521A1 (de) | 2008-06-03 | 2009-12-10 | Osram Gesellschaft mit beschränkter Haftung | Thoriumfreie Hochdruckentladungslampe für Hochfrequenzbetrieb |
DE102013223708A1 (de) | 2013-11-20 | 2015-05-21 | Osram Gmbh | Hochdruckentladungslampe für Kraftfahrzeugscheinwerfer |
Also Published As
Publication number | Publication date |
---|---|
CN101036214A (zh) | 2007-09-12 |
DE102004024063A1 (de) | 2005-12-01 |
JP2007537564A (ja) | 2007-12-20 |
CN101036214B (zh) | 2011-06-22 |
US20070222387A1 (en) | 2007-09-27 |
CA2566035A1 (en) | 2005-11-24 |
EP1754245B1 (de) | 2017-08-30 |
EP1754245A2 (de) | 2007-02-21 |
WO2005112074A3 (de) | 2007-04-19 |
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