EP2499657A1 - Quecksilberfreie hochdruckentladungslampe mit reduziertem zinkhalogenidanteil - Google Patents
Quecksilberfreie hochdruckentladungslampe mit reduziertem zinkhalogenidanteilInfo
- Publication number
- EP2499657A1 EP2499657A1 EP10775785A EP10775785A EP2499657A1 EP 2499657 A1 EP2499657 A1 EP 2499657A1 EP 10775785 A EP10775785 A EP 10775785A EP 10775785 A EP10775785 A EP 10775785A EP 2499657 A1 EP2499657 A1 EP 2499657A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- discharge
- discharge lamp
- range
- filling
- pressure discharge
- 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
Links
Classifications
-
- 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 EP 1 351 276 A2.
- This document loading 5 writes a high pressure discharge lamp for vehicle headlights ⁇ with a mercury-free filling, which has a Zinkj odidanteil in the calculation of 2 mg to 6 mg per 1 cm 3 of the discharge vessel volume.
- the zinc component of the filling replaces the previously used mercury and is needed to adjust the so-called burning voltage of the high-pressure discharge lamp.
- the term firing voltage designates the operating voltage of the high-pressure discharge lamp after completion of its ignition and starting phase and the achievement of its quasi-stationary operating state, in which all the filling components are in the gaseous state.
- the use of the zinc component in the filling has the disadvantage that the luminous flux generated by the high-pressure discharge lamp decreases with increasing zinc content in the filling. II. Presentation of the invention
- a high ⁇ pressure discharge lamp to be provided with a mercury-free filling, the reduced one cited in comparison with the above prior art electrical Leis ⁇ con- sumption and a comparable burning voltage be ⁇ sitting and generation a sufficiently high for use as a light source in the vehicle headlight luminous flux riert ,
- the high-pressure discharge lamp of the invention is provided as a light source in front headlamps of motor vehicles, and has a gas-tight sealed discharge vessel with a discharge space, are concluded Tan- in which electrodes and a filling for generating a gas discharge, wherein the filling is formed as a mercury-free fill comprising at least xenon and contains Haloge ⁇ halides of sodium, scandium, and zinc.
- the amount of Ha ⁇ halides in the discharge space in the range of from 8 mg to 15 mg per 1 cm 3 of the discharge space volume is the Kalt Scholl ⁇ pressure of xenon (which is the pressure of the xenon in the unloading In the range of 1.0 megapascal to 1.8 megapascals, the volume of the discharge space has a value in the range of 0.015 cm 3 to 0.022 cm 3 .
- the term mercury-free filling means that neither mercury nor a mercury compound is introduced into the discharge space of the discharge vessel.
- a high-pressure discharge lamp according to the invention is made possible, which has a reduced electrical power consumption at comparable burn voltage compared to the high-pressure discharge lamp according to the prior art and generates a sufficiently high luminous flux, so that it is suitable as a light source in headlights of motor vehicles.
- a high luminous flux can be achieved.
- the comparatively high filling pressure of the Xe ⁇ non contributes together with the small volume of the discharge space and the dosage of the metal halides to a sufficiently high burning voltage of the Hochlichentla ⁇ tion lamp, so that the addition of mercury or mercury compounds for filling the high-pressure discharge lamp according to the invention in order Setting their burning voltage can be dispensed with.
- the proportion of zinc halide in the filling is greater than 0 mg per 1 cm 3 of the discharge space volume and is preferably in the range of 0.1 mg to 1.0 mg per 1 cm 3 of the discharge space volume to a ⁇ reaching high burning voltage and luminous flux to ensure the high-pressure discharge lamp.
- Table 1 the relationship between the Z inkhalogenidanteil in percent by weight of the amount of halide in the discharge ⁇ space and the luminous flux of the high-pressure discharge lamp (curve 1) and the burning voltage of the Hochtikent discharge lamp (curve 2) shown.
- Curve 2 On the horizontal axis is plotted the percentage of zinc halide in weight percent based on the total amount of halides in the filling.
- the vertical axis on the one hand (left side of FIG. 3) the luminous flux of the high-pressure discharge lamp in lumens and on the other hand (right side of FIG. 3), the burning voltage of the high-pressure discharge lamp in volts applied.
- Curve 1 shows the dependence of the luminous flux of the high-pressure discharge lamp on the zinc halide content in the filling
- curve 2 dashed line
- the filling of the erfindungsge ⁇ MAESSEN high pressure discharge lamp in addition indium halide wherein the amount of indium halide in the filling is less than or equal to 3 0 percent by weight of the total amount of halides, and thus is significantly lower than the proportion of sodium and scandium in the filling ,
- the small indium halide i i in the filling serves to adjust the color locus of the white light emitted by the high-pressure discharge lamp in the standard color chart according to CIE 1931 and DIN 5033.
- the proportion of sodium halide is in the filling in the range of from 30 weight percent to 50 weight percent of the total amount of halides, and the proportion of scandium in the filling in the range from 30 weight percent to 60 weight percent of the total ⁇ quantity of the halides to white light in accordance with standard ECE Rule 99 with a color temperature in the range of 4000 Kelvin to 4500 Kelvin.
- the filling of the high-pressure discharge lamp according to the invention for the purpose of setting the burning voltage thulium, for example in the form of Thuliumhalogenid contain, wherein the proportion of Thuliumhalogenid in the filling in the range of 10 weight percent to 30 weight percent of the halides can be.
- the effect of thulium is similar to that of zinc, namely the increase in the burning voltage, the decrease in the luminous flux with increasing Thuli ⁇ umanteil is not as strong as the zinc.
- the proportion of zinc halide in the charge is less than or equal to 6 percent by weight based on the total amount of halides.
- the discharge vessel of the inventive high-pressure discharge lamp has advantageously in the range of unloading cargo space ⁇ an ellipsoidal outer contour and Be ⁇ rich between the electrodes has a circular cylindrical inner contour which for the ratio of the wall thickness of the discharge vessel, the relationship and preferably even the relationship applies, wherein Dl denotes the wall thickness of the discharge vessel in the region between the electrodes and D2, the wall thickness of the discharge vessel in the end portions of the discharge ⁇ space in which the electrodes are arranged.
- the discharge vessel of the high-pressure discharge lamp according to the invention has a smaller convex curvature than the discharge vessel of high-pressure discharge lamps according to the prior art. Therefore, in the erfindungsgemä- SEN high pressure discharge lamp, for example, the prescribed for driving ⁇ imaging headlamps optical or op ⁇ schematically effective electrode spacing of 4.2 mm according to ECE Re ⁇ gel 99, with the aid of a comparatively larger real electrode spacing (measured by X-ray) ER targeting as in high-pressure discharge lamps according to the prior art.
- the real Elect ⁇ clear distance is at high pressure discharge lamps according to the prior art at 3.6 mm, while the actual electrical the distance in the high-pressure discharge ⁇ lamps according to the invention is preferably in the range of 3.8 mm to 4.0 mm.
- the comparatively larger electrode spacing likewise contributes to a higher burning voltage of the high-pressure discharge lamp according to the invention, so that for this reason a sufficiently high burning voltage can be achieved despite reduction of the amount of zinc component and absence of mercury in the filling.
- the discharge vessel in the region between the electrodes has an inner diameter in the range of 2.0 mm to 2.7 mm, more preferably in the range of 2.1 mm and 2.4 mm, and an outer diameter in the range of 5.0 mm and 6.0 mm, more preferably in the range of 5.3 mm and 5.7 mm.
- the discharge vessel in the region between the electrodes has a comparatively high wall thickness, which contributes to improved burst protection and good thermal insulation of the discharge vessel.
- the electrodes of the high pressure discharge lamp according to the invention are preferably rod-shaped and formed besit ⁇ zen a diameter which is preferably in the range of 0.20 mm to 0.30 mm and particularly preferably in the range of 0.25 mm to 0.27 mm to to ensure high Stromtragfä ⁇ ability of the electrodes, so that sufficient invention modern high pressure discharge lamp during the so- ⁇ called run-up phase, which immediately follows the ignition phase and during the halides of filling evaporation ⁇ fen, with three to five times the value of the nominal power can be operated and thereby a faster Transition to the quasi-stationary operating state of the high-pressure discharge lamp can be achieved.
- the cold filling pressure of xenon in the filling of the high-pressure discharge lamp according to the invention is in the range from 1.0 megapascal to 1.8 megapascal. However, more preferably the range of 1.5 megapascals to 1.7 Mega Pascal, because it can be increased by the relatively high xenon pressure, the burning voltage of the high pressure discharge lamp according to the invention and white light can be generated by means of the high xenon pressure already un ⁇ indirectly after ignition of the high pressure discharge lamp ,
- the amount of halides in the interior of Entladungsgefä ⁇ SLI the high pressure discharge lamp of the invention is in the range of 8 milligrams to 15 milligrams per 1 cubic centimeter of the discharge chamber volume and the Entla ⁇ manure volume having a value in the range of 0.015 cubic centimeter to 0.022 cubic centimeters, as already mentioned above.
- a halide amount ranging from 10 milligrams to 14 milligrams per 1 cubic centimeter of discharge volume and a discharge space volume ranging from 0.016 cubic centimeters to 0.019 cubic centimeters for the high pressure discharge lamp of the present invention to provide an electrical power consumption in the range of 22 watts to 28 watts allow in quasista ⁇ tionary operating state of the high pressure discharge lamp according to the invention.
- the high-pressure discharge lamp according to the invention can be designed such that during its operation a Luminous flux of less than or equal to 2000 Im generated in order to use the high-pressure discharge lamp according to the invention in driving ⁇ zeugscheinwerfer can, who have no headlight washer.
- Figure 1 is a side view of a high pressure discharge lamp according to the preferred embodiment of the invention in a schematic representation
- Figure 2 is an enlarged view of the discharge space of the discharge vessel, which in Figure 1 illustra ⁇ th high pressure discharge lamp in a diagrammatic and sectional view of Figure 3 A showing the dependence of light ⁇ current and the operating voltage of the high-pressure discharge lamp of the Zinkhalogenidanteil in the filling
- the invention is a mercury-free metal halide high-pressure discharge lamp with an electrical power consumption of 25 watts ⁇ rule.
- This lamp is intended for use in a vehicle headlight. It has a two-sided sealed discharge vessel 10 made of quartz glass with a volume of the discharge space 106 ⁇ of 17 mm 3, in which an ionizable filling is gas-tight manner.
- 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 wall of the discharge vessel 10 is thus ⁇ bulges convexly ge in the area of the discharge space 106 and has between the electrodes 11, 12 a greater wall thickness than at the two ends of the Entla ⁇ dung space 106, in which the electrodes 11 are arranged, 12th
- the ratio of the wall thicknesses D1 / D2 is in the range of 1.2 to 1.3. That is, it applies the relationship wherein Dl the wall thickness of the discharge vessel 10 in Be ⁇ rich between the electrodes 11, 12 and D2, the wall thickness of the discharge vessel 10 in the end portions of the discharge space 106, in which the electrodes 11, 12 are arranged ⁇ indicates.
- the two ends 101, 102 of the discharge vessel 10 are each sealed by means of a molybdenum foil-Einschmel tion 103, 104.
- the molybdenum foils 103, 104 each have a length of 7.5 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 0.26 mm.
- the length of the electrodes 11, 12 is in each case 6.5 mm.
- the real that is by means of X-ray ge ⁇ -measured distance between the electrodes 11, 12 is 3.7 mm, while the optical or optically active From ⁇ stand between the electrodes 11, 12 is about 3.9 mm.
- This difference between the real and the optical distance between the electrodes 11, 12 is determined by the optical properties polluter gently (for example, by the convex curvature, and the optical refractive index) of the wall of the dung Entla ⁇ vessel 10 in the region of the discharge space 106th
- the electrodes 11, 12 are in each case electrically conductively connected to one of the molybdenum foil melts 103, 104 and via the base-remote power supply 13 and the current return 17 or via the base-side power supply 14 to an electrical connection of the lamp base 15, which essentially consists of plastic ⁇ the.
- the discharge vessel 10 is encased in a glass Au ⁇ tkolben sixteenth
- the outer bulb 16 has a base 15 anchored in the extension 161.
- the discharge vessel 10 on the base side has a tubular extension 105 made of quartz glass, in which the base-side check power supply ⁇ tion 14 passes.
- the current return 17 facing surface region of the discharge vessel 10 is provided with a licht carefullylässi ⁇ conditions, electrically conductive coating 107.
- This coating 107 extends in the longitudinal direction of the lamp over the entire length of the discharge space 106 and over a portion, about 50 percent, of the length of Tar ⁇ compacted ends 101, 102 of the discharge vessel 10.
- the coating 107 is on the outside of the Entladungsge- vessel 10 attached and extends about 5 percent to 10 percent of the circumference of the discharge vessel 10. However, the coating 107 may also extend over 50 percent of the circumference of the discharge vessel 10 or even over more than 50 percent of the circumference of the discharge vessel 10.
- Such a wide version of the coating 107 has the advantage that it increases the efficiency of the high-pressure discharge lamp, as it reflects a part of the infrared radiation generated by the discharge back into the discharge vessel and thereby for a selective heating of the colder, during lamp operation below the electrodes lying areas of Entla ⁇ tion vessel 10 provides, in which collect the metal halides of the ionizable filling.
- the coating 107 consists of doped tin oxide, for example of tin oxide doped with fluorine or antimony or, for example, boron and / or lithium doped tin oxide.
- This high-pressure discharge lamp is operated in horizon ⁇ tal position, that is, with disposed in a horizonta ⁇ len level electrodes 11, 12, wherein the lamp is oriented such that the current return 17 extends un ⁇ terrenz of the discharge vessel 30 and the outer bulb sixteenth Details of these, acting as an ignition aid Be ⁇ coating 107 are described in EP 1632985 Al.
- the outer bulb 16 is made of quartz glass doped with ultraviolet ray absorbing materials such as cerium oxide and titanium oxide. Suitable glass together ⁇ men experienceen for AUSS ko en 1 be 1 ng as disclosed 0700579 Bl in the EP.
- the enclosed in the discharge vessel ionizable filling consists of xenon with a cold filling, the means a measured at a temperature of 25 ° C filling pressure, of 1.6 megapascals, and the iodides of sodium, scandium, zinc and indium.
- the burning voltage of the lamp is about 40 volts. Its color temperature is around 4500 Kelvin.
- the total amount of the halides or iodides of the metals sodium, scandium, zinc and indium in the filling is 13.83 mg / cm 3 , that is 13.83 milligrams per 1 cubic centimeter of discharge space volume, wherein the weight proportions of the iodides of the metals sodium, Scandi ⁇ to, zinc, and indium based on the total amount of Ha ⁇ halides are as follows:
- Zinc iodide 5.8% by weight, corresponding to one
- Indium iodide 0.2% by weight, corresponding to one
- the color rendering index of the metal halide high pressure discharge lamp is 65 and its luminous efficacy is 90 lm / W.
- the wall load is about 80 W / cm 2 .
- the high pressure discharge lamp generates a luminous flux of less than or equal to 2000 in and can therefore be ⁇ be exaggerated in vehicle headlamps without headlight washing system, for example, a daytime running lights, Ne ⁇ bell layer or to generate continuous running lights.
- the halogen metal-vapor high-pressure discharge lamp according to the invention is operated immediately after the ignition of the gas discharge in the discharge vessel with the three 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 is supported, this almost exclu ⁇ Lich of xenon, the xenon since only at this time present in gaseous form in the discharge vessel.
- 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 Dampfpha ⁇ se, so as a xenon Anlagen horrentla- discharge lamp, 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.
- a quasi-stationary operating state of the lamp is reached, in which the lamp is operated with its rated power of 25 watts and a burning voltage of 40 volts.
- burning voltage therefore refers to the operating voltage of the high-pressure discharge lamp in quasi-stationary operation.
- the filling may also contain thulium iodide.
- iodides of the aforementioned metals or in addition to the iodides of these metals, other halides, for example, bromides or chlorides of these metals in the filling can be used.
Landscapes
- Discharge Lamp (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200910052999 DE102009052999A1 (de) | 2009-11-12 | 2009-11-12 | Hochdruckentladungslampe |
PCT/EP2010/066472 WO2011057903A1 (de) | 2009-11-12 | 2010-10-29 | Quecksilberfreie hochdruckentladungslampe mit reduziertem zinkhalogenidanteil |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2499657A1 true EP2499657A1 (de) | 2012-09-19 |
EP2499657B1 EP2499657B1 (de) | 2014-12-03 |
Family
ID=43334513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10775785.8A Not-in-force EP2499657B1 (de) | 2009-11-12 | 2010-10-29 | Quecksilberfreie hochdruckentladungslampe mit reduziertem zinkhalogenidanteil |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2499657B1 (de) |
JP (1) | JP2013511117A (de) |
CN (1) | CN102687235B (de) |
DE (1) | DE102009052999A1 (de) |
WO (1) | WO2011057903A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011082323A1 (de) * | 2011-09-08 | 2013-03-14 | Osram Ag | Hochdruckentladungslampe für Kraftfahrzeugscheinwerfer |
DE102014204932A1 (de) * | 2014-03-17 | 2015-09-17 | Osram Gmbh | Hochdruckentladungslampe |
DE102015200162A1 (de) | 2015-01-08 | 2016-07-14 | Osram Gmbh | Hochdruckentladungslampe |
JP2016181381A (ja) * | 2015-03-24 | 2016-10-13 | 東芝ライテック株式会社 | 放電ランプ |
JP2017098009A (ja) * | 2015-11-20 | 2017-06-01 | 東芝ライテック株式会社 | 放電ランプ |
JP6850434B2 (ja) * | 2017-04-26 | 2021-03-31 | 東芝ライテック株式会社 | 放電ランプ |
Family Cites Families (15)
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 |
US6853140B2 (en) | 2002-04-04 | 2005-02-08 | Osram Sylvania Inc. | Mercury free discharge lamp with zinc iodide |
JP2004172056A (ja) * | 2002-11-22 | 2004-06-17 | Koito Mfg Co Ltd | 放電ランプ装置用水銀フリーアークチューブ |
DE10312290A1 (de) | 2003-03-19 | 2004-09-30 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Hochdruckentladungslampe für Fahrzeugscheinwerfer |
EP1632985B1 (de) | 2004-09-07 | 2014-06-25 | OSRAM GmbH | Hochdruckentladungslampe |
CN101053059A (zh) * | 2004-10-29 | 2007-10-10 | 东芝照明技术株式会社 | 金属卤化物灯以及照明装置 |
US20080001543A1 (en) * | 2004-10-29 | 2008-01-03 | Takahito Kashiwagi | Metal Halide Lamp and Lighting Equipment |
WO2007004663A1 (ja) * | 2005-07-05 | 2007-01-11 | Harison Toshiba Lighting Corporation | メタルハライドランプおよびこれを用いた照明装置 |
WO2008056469A1 (fr) * | 2006-11-09 | 2008-05-15 | Harison Toshiba Lighting Corp. | Lampe à halogénure métallisé |
US8030847B2 (en) * | 2007-03-12 | 2011-10-04 | Koninklijke Philips Electronics N.V. | Low power discharge lamp with high efficacy |
EP2143130A2 (de) * | 2007-04-05 | 2010-01-13 | Philips Intellectual Property & Standards GmbH | Quecksilberfreie hochdruck-gasentladungslampe |
DE102007018614A1 (de) * | 2007-04-19 | 2008-10-23 | Osram Gesellschaft mit beschränkter Haftung | Hochdruckentladungslampe und Fahrzeugscheinwerfer mit Hochdruckentladungslampe |
EP2195824B1 (de) * | 2007-09-24 | 2017-05-10 | Philips Intellectual Property & Standards GmbH | Thoriumfreie entladungslampe |
JP5313710B2 (ja) * | 2008-02-12 | 2013-10-09 | 株式会社小糸製作所 | 放電ランプ装置用水銀フリーアークチューブ |
ATE544171T1 (de) * | 2008-04-14 | 2012-02-15 | Koninkl Philips Electronics Nv | Entladungslampe mit hohem wirkungsgrad |
-
2009
- 2009-11-12 DE DE200910052999 patent/DE102009052999A1/de not_active Withdrawn
-
2010
- 2010-10-29 CN CN201080051543.6A patent/CN102687235B/zh not_active Expired - Fee Related
- 2010-10-29 EP EP10775785.8A patent/EP2499657B1/de not_active Not-in-force
- 2010-10-29 JP JP2012538272A patent/JP2013511117A/ja active Pending
- 2010-10-29 WO PCT/EP2010/066472 patent/WO2011057903A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2011057903A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102687235B (zh) | 2015-07-08 |
JP2013511117A (ja) | 2013-03-28 |
WO2011057903A1 (de) | 2011-05-19 |
CN102687235A (zh) | 2012-09-19 |
EP2499657B1 (de) | 2014-12-03 |
DE102009052999A1 (de) | 2011-05-19 |
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