EP2529391B1 - Hochdruckentladungslampe - Google Patents

Hochdruckentladungslampe Download PDF

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Publication number
EP2529391B1
EP2529391B1 EP11714554.0A EP11714554A EP2529391B1 EP 2529391 B1 EP2529391 B1 EP 2529391B1 EP 11714554 A EP11714554 A EP 11714554A EP 2529391 B1 EP2529391 B1 EP 2529391B1
Authority
EP
European Patent Office
Prior art keywords
discharge
discharge vessel
layer
region
vessel
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.)
Not-in-force
Application number
EP11714554.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2529391A1 (de
Inventor
Michael Boenigk
Marc Czichy
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.)
Osram GmbH
Original Assignee
Osram 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 Osram GmbH filed Critical Osram GmbH
Publication of EP2529391A1 publication Critical patent/EP2529391A1/de
Application granted granted Critical
Publication of EP2529391B1 publication Critical patent/EP2529391B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
    • 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
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/547—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode outside the vessel
    • 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 according to the preamble of patent claim 1.
  • Such a high-pressure discharge lamp is for example in the EP 1 632 985 A1 or US 5,162,693 A1 disclosed.
  • This document describes a high-pressure discharge lamp for vehicle headlamps with a translucent discharge vessel, which encloses a discharge space and has two sealed ends, and with two extending from the sealed ends in the discharge space electrodes and arranged in the discharge space filling for generating a gas discharge, as well as with the sealed ends led out power supply to the power supply of the electrodes.
  • On the surface of the discharge vessel serving as a starting aid electrically conductive layer is arranged- This Zündanges Mrs is integrally formed. It extends over the entire longitudinal extent of the discharge space and according to a symmetrical embodiment over both sealed ends of the discharge vessel and according to an asymmetrical embodiment, only over one of the two sealed ends of the discharge vessel.
  • This one-piece Zündis Mrs has the disadvantage that it does not allow combination with serving as an additional ignition aid auxiliary discharge in an outer bulb of the high-pressure discharge lamp, because they for such an auxiliary discharge an electrical short circuit along the Represents discharge vessel.
  • the symmetrical embodiment of this one-piece Zündis Mrs has the further disadvantage that due to their capacitive coupling to both electrodes, the electric field distributed symmetrically between the Zündostik and two electrodes and thus only half the field strength is available over each electrode.
  • the asymmetric embodiment of the one-piece Zündcoussicht according to the prior art has the further disadvantage that the degree of their effectiveness depends on the polarity of the half-waves of Zündtemposimpulse and of which of the two electrodes with the "hot" potential of Zündtemposimpulse, that is with the high potential compared to the ground potential, is applied.
  • the high-pressure discharge lamp according to the invention has a light-transmitting discharge vessel, which encloses a discharge space and has two sealed ends, and two electrodes extending from the sealed ends into the discharge space and one in the discharge space arranged filling for generating a gas discharge, as well as led out of the sealed ends power supply to the power supply of the electrodes.
  • a light-transmitting discharge vessel which encloses a discharge space and has two sealed ends, and two electrodes extending from the sealed ends into the discharge space and one in the discharge space arranged filling for generating a gas discharge, as well as led out of the sealed ends power supply to the power supply of the electrodes.
  • On the surface of its discharge vessel serving as a starting aid electrically conductive layer is arranged.
  • this electrically conductive layer consists of at least a first layer section, which is arranged on a first sealed end of the discharge vessel and extends to the surface of the discharge space enclosing the area of the discharge vessel, and of a second layer section, which on the second sealed end of Discharge vessel is arranged and extends up to the surface of the discharge space enclosing portion of the discharge vessel, so that arranged on the surface of the discharge space enclosing portion of the discharge vessel portions of the first and second layer portions are spaced apart and the layer portions are electrically isolated.
  • the two layer sections of the electrically conductive layer arranged galvanically separated from one another each have a good capacitive coupling to the power supply, which protrudes from the respective sealed end of the discharge vessel, on which the layer section is arranged. That is, the first layer portion has a good capacitive coupling to the power supply that protrudes from the first sealed end of the discharge vessel and the second layer portion has a good capacitive coupling to the power supply coming out of the second sealed end protruding from the discharge vessel.
  • the two layer sections of the electrically conductive layer serving as a starting aid are also arranged galvanically separated from the electrodes and the voltage supply of the high-pressure discharge lamp.
  • the first layer section extends on the surface of the discharge space enclosing portion of the discharge vessel in the direction of the second sealed end at least up to the height of the protruding from the second sealed end into the discharge space second electrode, and analogously, the second layer portion extends on the surface of the the discharge chamber surrounding the discharge space in the direction of the first sealed end at least up to the height of the first weighted from the first end of the discharge vessel in the discharge space protruding first electrode.
  • This configuration of the two layer sections ensures that the capacitive coupling between the first layer section and the current supply projecting from the first sealed end of the discharge vessel is greater than the capacitive coupling between the first layer section and the second sealed end of the discharge vessel the discharge space protruding, second electrode.
  • the capacitive coupling between the second layer section and the power supply line protruding from the first sealed end of the discharge vessel is greater than the capacitive coupling between the second layer section and the first electrode projecting from the first sealed end of the discharge vessel and projecting into the discharge space.
  • the first and second layer sections respectively extend over the entire longitudinal extent of the region of the discharge vessel surrounding the discharge space.
  • the term longitudinal extent here refers to the extent parallel to a fictitious connection path of the discharge-side ends of the two electrodes.
  • the first layer portion is preferably not extended to the second sealed end of the discharge vessel to avoid a capacitive short circuit.
  • the second layer portion is not extended to the first sealed end of the discharge vessel.
  • the high-pressure discharge lamp according to the invention preferably has an outer bulb which surrounds at least the region of the discharge vessel provided with the electrically conductive layer in order to protect this layer from damage and to form an auxiliary discharge in the space between the discharge vessel and the outer bulb during the ignition phase of the high-pressure discharge lamp between the first and second layer portion of the electrically conductive layer.
  • the air pressure in the intermediate space may also be reduced relative to normal pressure or, for example, a gas filling containing nitrogen or noble gas with a cold filling pressure (that is, Filling pressure at a temperature of 22 ° C measured) in the range of 5 kPa to 15 kPa may be provided in the intermediate space.
  • the electrically conductive layer of the high-pressure discharge lamp according to the invention is translucent and particularly preferably transparent, in order to cause the least possible absorption of light by this layer, so that the high-pressure discharge lamp can be used as a light source in a vehicle headlight.
  • the parts of the first and second layer sections which extend over the discharge space and which surround the discharge space are strip-shaped in each case.
  • the electrically conductive layer serving as an ignition aid may be arranged on a surface region of the discharge vessel, which is opposite to a recirculated to the lamp base current return and which plays no role for the image in the headlight.
  • the first and second layer sections each cover a considerable part of the surface of a half-shell of an ellipsoidal or spherical region of the discharge vessel surrounding the discharge space.
  • the layer sections can serve for selective heating of the coated regions of the discharge vessel surrounding the discharge space because the layer sections Reflect a portion of the infrared radiation generated in the gas discharge back into the discharge space.
  • first embodiment of the invention is a mercury-free metal halide high-pressure discharge lamp with an electrical power consumption of about 35 watts.
  • This lamp is designed to be used in a vehicle headlight. It has a two-sided sealed discharge vessel 10 made of quartz glass with a volume of 24 mm 3 , in which an ionizable filling, consisting of xenon and halides of the metals sodium, scandium, zinc and indium, gas-tight enclosed.
  • the inner contour of the discharge vessel 10 is circular-cylindrical and its outer contour is ellipsoidal.
  • the inner diameter of the discharge space 106 is 2.6 mm and its outer diameter is 6.3 mm.
  • the two ends 101, 102 of the discharge vessel 10 are each sealed by means of a molybdenum foil sealing 103, 104.
  • the electrodes 11, 12 are made of tungsten. Their thickness or their diameter is 0.30 mm.
  • the optically effective distance between the electrodes 11, 12 is 4.2 mm.
  • the electrodes 11, 22 are in each case electrically conductively connected via one of the molybdenum foil melts 103, 104 and via the base-remote power supply wire 13 and the current return 17 or via the base-side power supply wire 14 to an electrical connection of the lamp base 15 which consists essentially of plastic.
  • the discharge vessel 10 is surrounded by a glass outer bulb 16.
  • the discharge vessel 10 is provided on its outer surface with a two-part electrically conductive layer 107, 107 ', which serves as a starting aid and is designed to be translucent or transparent.
  • This layer 107, 107 ' consists of a first layer portion 107, which is arranged on the first, sealed-off sealed end 101 of the discharge vessel 10 and is extended to the discharge vessel region surrounding the discharge space 106, and from a second layer portions 107', on the second, near-socket sealed end 102 of the discharge vessel 10 is arranged and is also extended to the discharge vessel region which surrounds the discharge space 106.
  • the two layer sections 107, 107 ' are arranged at a distance from one another and are galvanically separated from one another.
  • the first layer section 107 is arranged on a surface region of the discharge vessel 10 facing the current-pressure guide 17, and the second layer section 107 'is arranged on a surface region of the discharge vessel 10 facing away from the current-carrying guide 17. Since the high-pressure discharge lamp is usually used in a horizontal operating position, that is, with horizontally extending electrodes 11, 12, so that the current return 17 extends below the electrodes 11, 12, the first layer section 107 is on the top of the discharge vessel 10 and the second layer portion 107 'on the underside of the discharge vessel 10 is arranged. Both layer sections 107, 107 'are arranged galvanically separated from the electrodes 11, 12.
  • the first layer portion 107 has good capacitive coupling to the molybdenum foil 103 embedded in the first sealed end 101, and the second layer portion 107 'has good capacitive coupling to the molybdenum foil 104 embedded in the second sealed end 102.
  • the sealed ends 101, 102 are formed as pinch seals and the molybdenum foils 103, 104 are embedded gas-tight therein.
  • the sealed ends 101, 102 are therefore flattened and accordingly have a smaller thickness perpendicular to the plane defined by the surfaces of the molybdenum foils than parallel to this plane.
  • the arranged on the top of the discharge space 106 enclosing portion of the discharge vessel 10 portion 107a of the first layer portion 107 extends over Accordingly, the portion 107'a of the second layer section 107 'arranged on the underside of the region of the discharge vessel 10 enclosing the discharge space 106 likewise extends over the entire longitudinal extent of the discharge space 106.
  • the layer sections 107, 107 ' are substantially strip-shaped and follow the curvature of the surface of the discharge vessel 10. They 107, 107' consist of doped zinc oxide, for example of tin oxide doped with fluorine or antimony or, for example, tin oxide doped with boron and / or lithium ,
  • the high voltage pulses for igniting the gas discharge between the electrodes 11, 12 are, for safety reasons, badly supplied via the socket near power supply wire 14 of the second electrode 12.
  • the space between the outer bulb 16 and the discharge vessel 10 is covered with an inert gas having a cold filling pressure in the range of 5 kPa to 15 kPa.
  • the term cold filling pressure refers to the filling pressure, which is measured at a temperature of 22 ° C.
  • the inert gas is mixed with small amounts of oxygen. The amount of oxygen is adjusted so that, on the one hand, diffusion of oxygen from the tin oxide layer 107 is prevented and, on the other hand, no oxidation of the dopants in the tin oxide coating 107, 107 'is caused. For this purpose, already satisfy a few ppm oxygen content, for example, 100 ppm oxygen content (weight fraction) in the filling gas.
  • the inert gas is preferably nitrogen or a noble gas or a noble gas mixture or a nitrogen-noble gas mixture.
  • the intermediate space between discharge vessel 10 and outer bulb can also be filled with air, for example with a cold filling pressure in the range from 5 kPa to 15 kPa.
  • FIGS. 2 to 4 Further embodiments of the invention for the shape of the two-part, serving as a starting aid electrically conductive layer are shown schematically
  • the high-pressure discharge lamps according to the further exemplary embodiments have the same construction as the high-pressure discharge lamp explained in greater detail above, in accordance with FIG FIG. 1 illustrated first embodiment of the invention.
  • the high-pressure discharge lamps according to the further exemplary embodiments differ from the high-pressure discharge lamp according to the first exemplary embodiment of the invention only by the shape of the ignition auxiliary layer 107, 107 '. In all other details, all embodiments of the invention are consistent. Therefore, in the FIGS. 2 to 4 only the discharge vessel of the high-pressure discharge lamp with the two-part Zündos Mrs shown and for identical parts of the high-pressure discharge lamps are in the FIGS. 1 to 4 the same reference numerals used.
  • FIG. 2 is schematically shown the two-part Zündcous Mrs 207, 207 'according to the second embodiment of the invention.
  • the layer sections 207, 207 'according to the second exemplary embodiment of the invention differ from the layer sections 107, 107' according to the first exemplary embodiment only in that the parts of the layer sections 207, 207 'arranged on the sealed ends 101, 102 enclose the sealed ends 101, 102 enclose annularly in the region of the molybdenum foils 103, 104.
  • the part 207a of the first layer portion 207 is on the top of the discharge space However, the part 207a extends only over part of the circumference of the upper half-shell of the ellipsoidal region of the discharge vessel 10.
  • the part 207'a of the second layer section 207 ' is arranged on the underside of the discharge chamber 206 surrounding the area of the discharge vessel 10 and extends over the entire longitudinal extent of the discharge space 106. However, the part 207'a extends only over part of the circumference of the lower half-shell of the ellipsoidal region of the discharge vessel 10
  • the underside or lower half shell of the ellipsoidal region of the discharge vessel 10 faces the current return 17, and the upper side or upper half shell of the ellipsoidal discharge vessel 10 faces away from the current return 17. This orientation applies to all embodiments.
  • FIG. 3 schematically the two-part Zündcous Mrs 307, 307 'according to the third embodiment of the invention is shown.
  • Both layer sections 307, 307 ' are arranged on the underside of the discharge vessel 10.
  • the parts 307b, 307'b of the two layer sections 307, 307 'arranged on the sealed ends 101, 102 extend in the region of the molybdenum foils 103, 104 over the entire width of the sealed ends 101, 102, in order to enable a good capacitive coupling.
  • the area of the ellipsoidal discharge vessel 10 surrounding the discharge space 106 extends onto the lower half-shell of parts 307a, 307a of FIG two layer sections 307, 307 'are formed as narrow strips which extend parallel to one another on the lower half shell and each extend over the entire longitudinal extension of the lower half shell of the ellipsoidal region of the discharge vessel 10.
  • the strip-like part 307a extends to the first sealed end 101 and is connected there to the other part 30'7b of the first layer section 307. Accordingly, the strip-like part 307'a extends to the second sealed end 102, where it is connected to the other part 307'b of the second layer section 307 '.
  • FIG. 4 schematically is the two-part Zündcous Mrs 407, 407 'according to the fourth embodiment of the invention illustrated both layer sections 407, 407' are arranged on the underside of the discharge vessel 10.
  • the parts 407b, 407'b of the two layer sections 407, 407 'arranged on the sealed ends 101, 102 extend in the region of the molybdenum foils 103, 104 over the entire width of the sealed ends 101, 102 and each provide a good capacitive coupling to the Corresponding molybdenum foil 103 or 104.
  • the parts 407a, 407a of the two layer sections 407, 407 'which extend onto the lower half shell of the region of the ellipsoidal discharge vessel 10 enclosing the discharge space 106 are formed as wide strips which run parallel to one another on the lower half shell and each extend over the entire longitudinal extent of the lower half-shell of the ellipsoidal region of the discharge vessel 10.
  • the strip-like Part 407a extends to the first sealed end 101 and is connected there to the other part 407b of the first layer section 407. Accordingly, the strip-like part 407'a extends to the second sealed end 102, where it is connected to the other part 407'b of the second layer section 407 '.
  • the strip-like parts 407a and 407'a extend perpendicularly to the longitudinal extent of the discharge space 106 in each case over approximately one third of the circumference of the lower half-shell of the ellipsoidal region of the discharge vessel 10.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
EP11714554.0A 2010-04-23 2011-04-14 Hochdruckentladungslampe Not-in-force EP2529391B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010028156A DE102010028156A1 (de) 2010-04-23 2010-04-23 Hochdruckentladungslampe
PCT/EP2011/055918 WO2011131559A1 (de) 2010-04-23 2011-04-14 Hochdruckentladungslampe

Publications (2)

Publication Number Publication Date
EP2529391A1 EP2529391A1 (de) 2012-12-05
EP2529391B1 true EP2529391B1 (de) 2014-09-10

Family

ID=44209716

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11714554.0A Not-in-force EP2529391B1 (de) 2010-04-23 2011-04-14 Hochdruckentladungslampe

Country Status (7)

Country Link
US (1) US20130134870A1 (zh)
EP (1) EP2529391B1 (zh)
JP (1) JP5553934B2 (zh)
KR (1) KR101764647B1 (zh)
CN (1) CN102859642B (zh)
DE (1) DE102010028156A1 (zh)
WO (1) WO2011131559A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104900476A (zh) * 2014-03-05 2015-09-09 上虞市大地照明电器有限公司 一种无汞纳米荧光灯及其制作工艺

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7206559A (zh) * 1972-05-16 1973-11-20
US4701664A (en) * 1986-01-09 1987-10-20 Becton, Dickinson And Company Mercury arc lamp suitable for inclusion in a flow cytometry apparatus
EP0366187A1 (en) * 1988-10-24 1990-05-02 Koninklijke Philips Electronics N.V. High-pressure discharge lamp
JPH0660851A (ja) * 1992-08-07 1994-03-04 Matsushita Electric Ind Co Ltd メタルハライドランプとその製造方法
US6563265B1 (en) * 2000-11-06 2003-05-13 General Electric Company Applying prealloyed powders as conducting members to arc tubes
DE102004043636A1 (de) * 2004-09-07 2006-03-09 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
DE102004050303A1 (de) * 2004-10-14 2006-04-27 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
EP1632985B1 (de) * 2004-09-07 2014-06-25 OSRAM GmbH Hochdruckentladungslampe
DE102004056004A1 (de) * 2004-11-19 2006-05-24 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Hochdruckentladungslampe
JP2007026921A (ja) * 2005-07-19 2007-02-01 Koito Mfg Co Ltd 自動車用放電バルブ
EP2041773B1 (en) * 2006-07-07 2010-11-24 Philips Intellectual Property & Standards GmbH Gas-discharge lamp

Also Published As

Publication number Publication date
KR20130073899A (ko) 2013-07-03
US20130134870A1 (en) 2013-05-30
CN102859642B (zh) 2015-06-03
JP2013525965A (ja) 2013-06-20
DE102010028156A1 (de) 2011-10-27
CN102859642A (zh) 2013-01-02
EP2529391A1 (de) 2012-12-05
KR101764647B1 (ko) 2017-08-03
JP5553934B2 (ja) 2014-07-23
WO2011131559A1 (de) 2011-10-27

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