WO2015139876A1 - Hochdruckentladungslampe für fahrzeugscheinwerfer - Google Patents
Hochdruckentladungslampe für fahrzeugscheinwerfer Download PDFInfo
- Publication number
- WO2015139876A1 WO2015139876A1 PCT/EP2015/052273 EP2015052273W WO2015139876A1 WO 2015139876 A1 WO2015139876 A1 WO 2015139876A1 EP 2015052273 W EP2015052273 W EP 2015052273W WO 2015139876 A1 WO2015139876 A1 WO 2015139876A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- halides
- range
- discharge lamp
- value
- filling
- 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
- H01J61/12—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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
- H01J61/827—Metal halide arc lamps
Definitions
- the invention relates to a high-pressure discharge lamp ge ⁇ Frankfurtss the preamble of claim 1.
- Such a high-pressure discharge lamp is disclosed, for example, in WO 2011/057903 Al.
- a high-pressure discharge lamp for vehicle headlights writes ⁇ with a mercury-free filling that emitted during operation white light with a color temperature of 4500 Kelvin Tempe ⁇ .
- the high pressure discharge lamp according to the invention is used as a light source in the vehicle headlamp, and has a gas-tight sealed discharge vessel, which has a Entla ⁇ -making space, are incorporated in the electrodes and a quecksil ⁇ bertransport filling for generating a gas discharge.
- the filling contains at least xenon and halides of sodium, scandium, zinc and indium, wherein the quotient has from the molar proportion of sodium and the molar proportion of scandium halide in the fuel lung ⁇ a value in the range 2 to 3
- the amount of halides in the discharge space is reduced overall to a value in the range of 8 to 11 micro ⁇ gram per 1 cubic millimeter of the discharge space volume and the weight fractions of zinc halide and indium halide are significantly increased compared to the prior art, so that the value for zinc halide in the range of 16 to 25 weight percent, preferably in the Be ⁇ rich 16-23 weight percent, and particularly before ⁇
- the cold filling pressure that is to say the pressure measured at a temperature of 25.degree. C., of xenon in the discharge space is in the value range of 1.1 to 1.5 megapascals and preferably in the range of 1.1 to 1.4 megapascals.
- the OF INVENTION ⁇ dung contemporary high-pressure discharge lamp emits during their Be ⁇ drive white light with a relative to the high-pressure discharge lamp according to the prior art by about 300 Kelvin increased to approximately 4800 Kelvin color temperature, while the luminous flux generated by it and their maintenance are ver ⁇ parable to the high pressure discharge lamp according to the prior art.
- the high-pressure discharge lamp according to the invention has the advantages that the comparatively high pressure Indiumhalogenidanteil their start-up phase is shortened and the stability of the discharge arc against mecha ⁇ African vibration is enhanced by the relatively low cold filling pressure of xenon and is made possible by the relatively small amount of halide in the discharge chamber ei ⁇ ne more homogeneous image of the discharge arc in the vehicle ⁇ headlights, because the Shading or distortion due to non-evaporated filling components is lower.
- start-up phase is the operating phase of the high-pressure discharge lamp which starts immediately after ignition of the gas discharge and ends with the attainment of a steady state operation of the high-pressure discharge lamp. During the start-up phase, the halides evaporate in the discharge space.
- the high pressure discharge lamp according to the invention has a similar internal voltage as the high-pressure discharge lamp according to the prior art because the caused by the hö ⁇ heren zinc and Indiumhalogenidanmaschine An ⁇ increase of the internal voltage due to the reduced cold filling pressure of xenon in the inventive high-pressure discharge lamp is compensated.
- burning voltage refers to the electrical voltage that forms after reaching a stationary operating state of the high-pressure discharge lamp between the electrodes or over the discharge arc. It corresponds to the Be ⁇ operating voltage of the high pressure discharge lamp.
- the halides are formed in the discharge space of the high-pressure discharge lamp according to the invention as iodides.
- Iodides have the advantage over other halides that they are less chemically aggressive and cause no chemical reaction with the material of the discharge vessel ⁇ .
- the halides sodium iodide, scandium iodide and zinc iodide and indium iodide are preferably used in the high-pressure discharge lamp according to the invention.
- the Sum ⁇ me of the shares of the above iodide gives vorzugswei ⁇ se the total amount of halides in the discharge space of the high pressure discharge lamp according to the invention. It has been found that the above iodides are completely sufficient to produce white light, which satisfies the law ⁇ inspection requirements that are placed on an insertable as a light source in the vehicle headlight high-pressure discharge lamp.
- the filling of the high pressure discharge lamp according to the invention owns a Natriumhaloge- nid with a value in the range of 30 to 40ORSspro ⁇ center and a proportion of scandium with a value in the range of 35 to 45 weight percent, each based on the total amount of halides in the Discharge room.
- Figure 1 is a perspective view of a Hochchristent- discharge lamp according to the preferred execution of the invention
- Figure 2 is a schematic representation of the outer bulb and the discharge vessel of the select in Figure 1 ⁇ formed high pressure discharge lamp
- the invention is a mercury-free metal halide high-pressure discharge lamp with an electrical power consumption ⁇ rule of nominal 35 watts.
- This lamp is intended for use in a vehicle headlight. It has a sealed on two sides decision discharge vessel 10 made of quartz glass with a volume of unloading ⁇ cargo space 106 of 22.5 mm 3, are enclosed in a gastight manner in the electrodes 11, 12 and a filling for generating a gas discharge.
- the outer contour of the discharge vessel 10 is ellipsoidal in shape and its inner contour is circular-cylindrical in the region between the electrodes 11, 12 (FIG. 2).
- the two ends 101, 102 of the discharge vessel 10 are each sealed by means of a fused in the quartz glass of the discharge vessel 10 molybdenum foil 103, 104.
- the molybdenum foils 103, 104 each have a length of 6.5 mm, a width of 2 mm and a thickness of 25 ym.
- the electrodes 11, 12 are made of tungsten. Their thickness or their diameter is 0.33 mm.
- the countries ge of the electrodes 11, 12 is 7.5 mm in each case.
- the optical or optically effective distance between the electrodes 11, 12 is approximately 4.1 mm.
- the electrodes 11, 12 are each connected via one of the fäßes in the quartz glass of the Entladungsge- fused molybdenum foil 103, 104 and so ⁇ ckelferne power supply 13 and the power return line 17 and on the base-side power supply 14 is electrically conductively connected to an electrical connection of the Lampenso ⁇ ckels 15 connected.
- the discharge vessel 10 is enveloped by a glass outer bulb 16, which is fused to the ends 101, 102 of the discharge vessel 10.
- the outer ⁇ piston 16 and the assembly formed by the outer piston 16 and the discharge vessel 10 by means of a metal ⁇ clamp 20 and a metal ring 21, the see through Sch Strukturla- 22 is connected to the metal bracket 20 fixed to the lamp socket 15 °.
- the discharge vessel 10 has a tube-like extension 105 made of quartz glass on the side, in which the socket-side power supply 14 extends.
- the power supply lines 14, 17 are electrically connected to a arranged in the interior of the lamp cap 15 ignition device (not shown), which serves to ignite the gas discharge in the high-pressure discharge lamp.
- the lamp base 15 consists essentially of plastic and is surrounded by a metallic housing in order to improve the electromagnetic shielding of the ignition device.
- a plug 23 for electrical connection of the high-pressure discharge lamp is arranged with a control gear.
- the surface region of the discharge vessel 10 facing the current return 17 is provided with a light-transmitting gene, electrically conductive coating 107 provided, which serves as a starting aid.
- the coating 107 is composed of doped tin oxide, for example, with fluorine doped tin oxide or on ⁇ timon or, for example, with boron or lithium and or doped tin oxide.
- the ⁇ se high pressure discharge lamp will be ⁇ driven into a horizontal position, that is, having arranged in a horizontal plane electrodes 11, 12, the lamp being so out ⁇ oriented such that the current return 17 extends below the discharge vessel 30 and the outer bulb sixteenth Details of this coating 107 are described in EP 1 632 985 A1.
- the outer bulb 16 is made of quartz glass which is doped with Ultraviolet radiation absorbie ⁇ leaders substances, such as cerium oxide and titanium oxide. Suitable glass compositions for the outer bulb glass are disclosed in WO 94/28576 A1 and in WO 2012/072398 Al.
- the enclosed in the discharge vessel filling be ⁇ is xenon with a cold fill pressure, that is a at a temperature of 25 ° C measured inflation pressure of 1.3 megapascals, and the iodides of sodium, scandium, zinc, and indium.
- the burning voltage of the lamp is approx. 42 volts. Its color temperature is about 4800 Kelvin.
- the total amount of the halides or iodides of the metals sodium, scandium, zinc and indium in the filling is 220 yg corresponding to 9.78 yg / mm 3 , ie 9.78 micro ⁇ gram per 1 cubic millimeter discharge volume, wherein the weight proportions of the iodides of the Metals of sodium, scandium, zinc and indium, based on the total amount of halides, are as follows: Sodium iodide (Nal): 35.75 weight percent, corresponding to a loading of 3.50 yg / mm 3 scandium iodide (SCI3): 40.4 weight percent, corresponding to a loading of 3.95 yg / mm 3 zinc iodide (Znl 2 ): 21 , 2% by weight, corresponding to a filling amount of 2.07 yg / mm 3 indium iodide (Inl): 2.65% by weight, corresponding to a filling amount of 0.26 y
- the proportions of sodium and scandium are 12.0 yg and 9.4 yg in the filling.
- the aforementioned proportions of sodium and scandium correspond to 0.52 10 "3 moles of sodium and 0.21 10 " 3 moles of scandium in the filling.
- the quotient of the molar proportions of sodium and scandium therefore has a value of 2.5 and the molar ratio of sodium to scandium in the filling is therefore 2.5: 1.
- the filling of the high pressure discharge lamp does not contain other components other than the components mentioned above, so that the sum of the proportions by weight of sodium iodide, Scandiumj iodide, zinc iodide and indium iodide gives the total amount, that is 100 weight percent, of the Ha ⁇ halides in the discharge space 106th
- the halogen metal-vapor high-pressure discharge lamp according to the invention immediately after the ignition of the gas discharge in the discharge vessel with the three operated to five times its rated power or their nominal current in order to ensure rapid evaporation of the metal halides in the io ⁇ nisierbaren filling. Immediately after ignition of the gas discharge, it is almost exclusively carried by the xenon, since only the xenon at this time point is present in the discharge vessel in gaseous form.
- the high ⁇ pressure discharge lamp operates at this time and during the so-called run-up phase during which pass over the Me ⁇ tallhalogenide the ionizable filling in the vapor phase se, therefore discharge lamp such as a xenon-Höchstdruckentla-, in which both the light emission as well as the electrical properties the discharge, in particular the voltage drop across the discharge path, are determined solely by the xenon and the electrode spacing.
- discharge lamp such as a xenon-Höchstdruckentla-, in which both the light emission as well as the electrical properties the discharge, in particular the voltage drop across the discharge path, are determined solely by the xenon and the electrode spacing.
- the lamp cap may be formed such that it in addition to the igniter holding ent ⁇ in its interior as well as components of the operating device, or even the complete operating device for the high-pressure discharge lamp.
- the lamp cap can also be formed without Zündvor- direction and the ignition device outside the lamp cap be formed as part of an external Be ⁇ instru- tion of the high-pressure discharge lamp.
Landscapes
- Discharge Lamp (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15702286.4A EP3031071B1 (de) | 2014-03-17 | 2015-02-04 | Hochdruckentladungslampe für fahrzeugscheinwerfer |
KR1020167011780A KR20160132812A (ko) | 2014-03-17 | 2015-02-04 | 자동차 헤드라이트용 고압 방전 램프 |
CN201580002217.9A CN105814661B (zh) | 2014-03-17 | 2015-02-04 | 用于车辆前照灯的高压放电灯 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014204932.6A DE102014204932A1 (de) | 2014-03-17 | 2014-03-17 | Hochdruckentladungslampe |
DE102014204932.6 | 2014-03-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015139876A1 true WO2015139876A1 (de) | 2015-09-24 |
Family
ID=52444310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2015/052273 WO2015139876A1 (de) | 2014-03-17 | 2015-02-04 | Hochdruckentladungslampe für fahrzeugscheinwerfer |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3031071B1 (de) |
KR (1) | KR20160132812A (de) |
CN (1) | CN105814661B (de) |
DE (1) | DE102014204932A1 (de) |
WO (1) | WO2015139876A1 (de) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007059086A (ja) * | 2005-08-22 | 2007-03-08 | Harison Toshiba Lighting Corp | メタルハライドランプ |
EP1912249A1 (de) * | 2005-07-28 | 2008-04-16 | Harison Toshiba Lighting Corp. | Metallhalogenidlampe, beleuchtungseinrichtung mit metallhalogenidlampe und scheinwerfer |
DE102008057703A1 (de) * | 2008-11-17 | 2010-05-20 | Osram Gesellschaft mit beschränkter Haftung | Quecksilberfreie Entladungslampe |
WO2011057903A1 (de) * | 2009-11-12 | 2011-05-19 | Osram Gesellschaft mit beschränkter Haftung | Quecksilberfreie hochdruckentladungslampe mit reduziertem zinkhalogenidanteil |
DE102010063755A1 (de) * | 2010-12-10 | 2012-06-14 | Osram Ag | Hochdruckentladungslampe |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4317369A1 (de) | 1993-05-25 | 1994-12-01 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Hochdruckentladungslampe und Herstellungsverfahren für eine Hochdruckentladungslampe |
EP1632985B1 (de) | 2004-09-07 | 2014-06-25 | OSRAM GmbH | Hochdruckentladungslampe |
DE102010062193A1 (de) | 2010-11-30 | 2012-05-31 | Osram Ag | Glasartikel |
-
2014
- 2014-03-17 DE DE102014204932.6A patent/DE102014204932A1/de not_active Withdrawn
-
2015
- 2015-02-04 WO PCT/EP2015/052273 patent/WO2015139876A1/de active Application Filing
- 2015-02-04 EP EP15702286.4A patent/EP3031071B1/de not_active Not-in-force
- 2015-02-04 KR KR1020167011780A patent/KR20160132812A/ko not_active Application Discontinuation
- 2015-02-04 CN CN201580002217.9A patent/CN105814661B/zh not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1912249A1 (de) * | 2005-07-28 | 2008-04-16 | Harison Toshiba Lighting Corp. | Metallhalogenidlampe, beleuchtungseinrichtung mit metallhalogenidlampe und scheinwerfer |
JP2007059086A (ja) * | 2005-08-22 | 2007-03-08 | Harison Toshiba Lighting Corp | メタルハライドランプ |
DE102008057703A1 (de) * | 2008-11-17 | 2010-05-20 | Osram Gesellschaft mit beschränkter Haftung | Quecksilberfreie Entladungslampe |
WO2011057903A1 (de) * | 2009-11-12 | 2011-05-19 | Osram Gesellschaft mit beschränkter Haftung | Quecksilberfreie hochdruckentladungslampe mit reduziertem zinkhalogenidanteil |
DE102010063755A1 (de) * | 2010-12-10 | 2012-06-14 | Osram Ag | Hochdruckentladungslampe |
Also Published As
Publication number | Publication date |
---|---|
DE102014204932A1 (de) | 2015-09-17 |
KR20160132812A (ko) | 2016-11-21 |
CN105814661A (zh) | 2016-07-27 |
EP3031071A1 (de) | 2016-06-15 |
CN105814661B (zh) | 2017-10-27 |
EP3031071B1 (de) | 2017-08-02 |
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