EP2529391A1 - Hochdruckentladungslampe - Google Patents
HochdruckentladungslampeInfo
- Publication number
- EP2529391A1 EP2529391A1 EP11714554A EP11714554A EP2529391A1 EP 2529391 A1 EP2529391 A1 EP 2529391A1 EP 11714554 A EP11714554 A EP 11714554A EP 11714554 A EP11714554 A EP 11714554A EP 2529391 A1 EP2529391 A1 EP 2529391A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- discharge
- layer
- discharge vessel
- vessel
- space
- 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
- H01J61/02—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 disclosed, for example, in EP 1 632 985 A1.
- This document describes a high-pressure discharge lamp for vehicle headlamps with a light-transmitting discharge vessel, which encloses a discharge space and has two sealed ends, and two extending from the sealed ends in the discharge space electrodes and arranged in the discharge space filling to produce a gas discharge, and from the sealed ends led out power supply to the power supply of the electrodes.
- On the surface of the discharge vessel an electrically conductive layer serving as a starting aid is arranged.
- This Zündys Mrs is integrally formed. It extends over the entire longitudinal expansion of the discharge space and in accordance with a symmetrical discharge pattern 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 Discharge vessel represents,
- 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 is distributed symmetrically between the ignition assist layer and both electrodes and thus only half the field strength is available across each electrode.
- the asymmetric embodiment of the prior art one-piece ignition assist view has the further disadvantage that the degree of its effectiveness depends on the polarity of the calf waves of the ignition voltage pulses and on which of the two electrodes with the "hot" potential of the ignition voltage pulses This means that the electric potential is high compared with the ground potential.
- 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.
- an electrically conductive layer serving as an ignition aid is arranged on the surface of its discharge vessel.
- this electrically conductive layer consists at least of a first layer section, which is arranged on a first sealed end of the discharge vessel and extends to the surface of the discharge chamber enclosing the discharge space, and of a second Schichtseinchnitt, which on the second sealed end of the Discharge vessel is arranged and extends to the surface of the discharge space enclosing area of the discharge vessel, so that arranged on the surface of the discharge space enclosing the region of the discharge vessel portions of the first and second layer portions are spaced from each other and the Schichtabechnitte galvanically separated are.
- the two, electrically isolated from each other layer sections of the electrically conductive layer each have a good capacitive coupling to the power supply, which ausheragt from the respective sealed end of the discharge vessel, on which the Schichtab- section is arranged. That is, the first layer portion has a good capacitive coupling to the power supply, which protrudes from the first sealed end of the discharge vessel and the second layer portion has a good capacitive coupling to the Strorazu Insert, which from the second sealed end protruding from the discharge vessel.
- the two layer sections of the electrically conductive layer serving as an ignition aid are also arranged galvanically separated from the electrodes and the voltage supply of the high-pressure discharge lamp.
- the first layer section preferably extends on the surface of the discharge chamber surrounding region of the discharge vessel in the direction of the second sealed end at least up to the height of the second electrode projecting from the second sealed end into the discharge space, and the second layer section similarly extends the surface of the discharge chamber surrounding the discharge space in the direction of the first sealed end, preferably at least up to the height of the sealed from the first end of the discharge vessel in the discharge raum protruding, first electrode.
- This embodiment of the two layer sections ensures that the capacitive coupling between the first layer section and the power supply leading out of 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 and the second electrode projecting into the discharge space.
- 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 high-pressure discharge membrane can project between the first layer section and the second electrode projecting into the discharge space from the second sealed end of the discharge vessel or between the second layer section and the first electrode protruding into the discharge space from the first sealed end of the discharge vessel
- Establish an electric field with a high field strength sufficient to - depending on the polarity of the Zündnapsim- pulses and whichever of the two electrodes is acted upon by the ignition voltage pulses a dielectrically impeded discharge between the first layer portion and the second electrode or between the second layer portion and the first electrode. Due to this dielectrically impeded discharge the ignition voltage required to ignite the gas discharge between the two electrodes is reduced, thus improving the ignitability of the high-pressure discharge lamp according to the invention.
- the first and second layer sections each extend over the entire longitudinal extent of the region of the discharge vessel surrounding the discharge space.
- the term longitudinal extent refers here to the extension 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 section 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 in the gap between the discharge vessel and the outer bulb during the ignition phase of the high-pressure discharge lamp - Allow discharge between the first and second layer portion of the electrically conductive layer.
- the air pressure in the intermediate space can also be reduced compared with 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 preferably 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 the light source in a vehicle headlight.
- the parts of the first and second layer sections which extend to the discharge space surrounding the discharge vessel are each formed in strips. As a result, it can be ensured that virtually no light is absorbed by the electrically conductive layer serving as an ignition aid.
- these strip-like layer sections can be arranged on a surface region of the discharge vessel, which is opposite to a current return led back to the lamp cap and which plays no role in the image in the headlight.
- the first and second layer portions each cover a substantial portion of the surface of a half shell of an ellipsoidal.
- the layer sections may serve for the selective heating of the coated regions of the discharge vessel surrounding the discharge space, since the layer deposition of the discharge chamber surrounds the discharge space. sections reflect part of the infrared radiation generated in the gas discharge into the discharge space, back.
- Figure 1 is a side view of a high-pressure discharge lamp according to the first embodiment of the invention
- Figure 2 is a side view of the discharge vessel of a
- Figure 3 is a plan view of the underside of the discharge vessel of a Kochchristentladungslampe according to the third embodiment of the invention
- Figure 4 is a plan view of the underside of the Entladungegefäßes a high-pressure discharge lamp according to the fourth embodiment of the invention
- FIG. 1 In the first embodiment of the invention shown schematically in Figure 1 is a mercury-free metal halide cooking pressure discharge lamp with an electrical power consumption of about 35 watts.
- 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 24 mm 3 , in which an ionizable filling, consisting of xenon and halides of the metals sodium, Scandiun, 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.
- a molybdenum foil sealing 103, 104 In the discharge space 106 of the discharge vessel 10 protrude into two electrodes 11, 12, between which forms the responsible for the light emission discharge arc during lamp operation.
- 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, 12 are in each case electrically conductively connected to 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 socket-side power supply wire 14 to an electrical connection of the lamp base 15 which essentially consists of plastic ,
- the molybdenum foil 103 embedded in the first, base-remote sealed end 101 of the discharge vessel 10, the power supply wire 13 projecting from this first sealed end 101 and the scrub return 17 returned to the lamp base 15 form the current supply for the first sealed end 101 into the discharge space 106 Electrode 11.
- the discharge vessel 10 is surrounded by a glass outer bulb 16.
- the Knt.ladungsgefäß 10 is provided on its outer surface with a two-part electrically conductive layer 107, 1Q7 ', which serves as a starting aid and is designed to be translucent or transparent.
- This layer 107, 107 ' consists of a first layer section 107, which is arranged on the first base-sealed end 101 of the discharge vessel 10 and extends onto the discharge vessel region which surrounds the discharge space 105 and from a second layer section 107', which is arranged on the second, sealed-bottomed sealed end 102 of the discharge vessel 10 and is also extended to the discharge vessel region which surrounds the discharge space 106.
- the first layer section 107 is arranged on a surface region of the discharge vessel 10 facing the current return 17, and the second layer section 107 'is arranged on a surface region of the discharge vessel 10 facing away from the current return 17. Since the high-pressure discharge lamp is usually used in a horizontal operating position, that is to say with horizontally extending electrodes 11, 12, as long as 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 1C7 '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 pinch seals formed and the molybdenum foils 103, 104 are embedded therein gas-tight.
- the sealed ends 101, 102 are therefore flattened and consequently terminate perpendicular to the plane defined by the surfaces of the molybdenum films a smaller thickness than parallel to this plane.
- the parts of the layer sections 107, 107 'arranged on the sealed ends 101, 102 run essentially parallel to the molybdenum foils 103, 104.
- the part 107a of the first layer section 107 arranged on the upper side of the region of the discharge vessel 10 enclosing the discharge space 105 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 portions 107, 107 ' are substantially strip-shaped and follow the curvature of the surface of the discharge vessel 10.
- They 107, 107' consist of doped Z.innoxid, for example, doped with fluorine or antimony tin oxide or, for example, with boron and / or lithium doped tin oxide.
- the high voltage pulses for igniting the gas discharge between the electrodes 11, 12 are usually supplied to the second electrode 12 via the power supply wire 14 near the socket.
- the space between the outer bulb 16 and the discharge vessel 10 is filled 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 the 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.
- 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 starting aid layer 107, 107 '. In all other details, all embodiments of the invention are consistent. Therefore, only the discharge vessel of the high-pressure discharge lamp with the two-part Zündos Mrs shown in Figures 2 to 4 and for identical parts of the high-pressure discharge lamps are used in Figures 1 to 4, the same reference numerals. 2 shows schematically the two-part Zündanges 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 portion 207a of the first layer portion 207 is on the top of the discharge 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 portion 207 ' is arranged on the underside of the discharge chamber 206 enclosing the region 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.
- the lower side 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 shows the two-part auxiliary ignition layer 307, 307 'according to the third exemplary embodiment of the invention.
- Both layer sections 307, 307 ' are arranged on the underside of the discharge vessel 10.
- the arranged on the sealed ends 101, 102 parts 307b, 307 'b of the two layer sections 307, 307' extend in the region of the molybdenum foils 103, 104 over the entire width of the sealed ends 101, 102, to allow a good capacitive coupling.
- the strip-like part 307a extends to the first sealed end 101, where it is connected to the other part 307b of the first layer section 307. Accordingly, the strip-like part 307 'a extends to the second sealed end 102 and is connected there to the other part 307' b of the second layer section 307 '.
- FIG. 4 schematically shows the two-part auxiliary ignition layer 407, 407 'according to the fourth exemplary embodiment of the invention.
- Both layer sections 407, 407 ' are arranged on the underside of the discharge vessel 10.
- the arranged on the sealed ends 101, 102 parts 407 b, 407 'b of the two layer sections 407, 407' extending in the molybdenum foils 103, 104 over the entire width of the sealed ends 101, 102 and each cause 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 are parallel on the lower half shell extend to each other and each extend over the entire longitudinal expansion of the lower half-shell of the ellipsoidal region of the discharge vessel 10.
- the strike fen shame part 407a extends to the first sealed end 101 and is there with the other part 407b of the first. Layer portion 407 connected.
- the strip-like part 407 'a extends to the second sealed end 102 and is connected there 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)
Abstract
Description
Claims
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 true EP2529391A1 (de) | 2012-12-05 |
EP2529391B1 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 (de) |
EP (1) | EP2529391B1 (de) |
JP (1) | JP5553934B2 (de) |
KR (1) | KR101764647B1 (de) |
CN (1) | CN102859642B (de) |
DE (1) | DE102010028156A1 (de) |
WO (1) | WO2011131559A1 (de) |
Families Citing this family (1)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7206559A (de) * | 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 (de) * | 1988-10-24 | 1990-05-02 | Koninklijke Philips Electronics N.V. | Hochdruckentladungslampe |
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 |
EP1632985B1 (de) * | 2004-09-07 | 2014-06-25 | OSRAM GmbH | Hochdruckentladungslampe |
DE102004050303A1 (de) * | 2004-10-14 | 2006-04-27 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | 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 |
JP5009984B2 (ja) * | 2006-07-07 | 2012-08-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | ガス放電ランプ |
-
2010
- 2010-04-23 DE DE102010028156A patent/DE102010028156A1/de not_active Withdrawn
-
2011
- 2011-04-14 CN CN201180020544.9A patent/CN102859642B/zh not_active Expired - Fee Related
- 2011-04-14 EP EP11714554.0A patent/EP2529391B1/de not_active Not-in-force
- 2011-04-14 KR KR1020127030783A patent/KR101764647B1/ko active IP Right Grant
- 2011-04-14 US US13/643,035 patent/US20130134870A1/en not_active Abandoned
- 2011-04-14 WO PCT/EP2011/055918 patent/WO2011131559A1/de active Application Filing
- 2011-04-14 JP JP2013505416A patent/JP5553934B2/ja not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2011131559A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102010028156A1 (de) | 2011-10-27 |
KR101764647B1 (ko) | 2017-08-03 |
US20130134870A1 (en) | 2013-05-30 |
JP2013525965A (ja) | 2013-06-20 |
KR20130073899A (ko) | 2013-07-03 |
CN102859642A (zh) | 2013-01-02 |
CN102859642B (zh) | 2015-06-03 |
WO2011131559A1 (de) | 2011-10-27 |
EP2529391B1 (de) | 2014-09-10 |
JP5553934B2 (ja) | 2014-07-23 |
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