EP0991107B1 - Beleuchtungssystem mit einer Entladungslampe - Google Patents
Beleuchtungssystem mit einer Entladungslampe Download PDFInfo
- Publication number
- EP0991107B1 EP0991107B1 EP99112643A EP99112643A EP0991107B1 EP 0991107 B1 EP0991107 B1 EP 0991107B1 EP 99112643 A EP99112643 A EP 99112643A EP 99112643 A EP99112643 A EP 99112643A EP 0991107 B1 EP0991107 B1 EP 0991107B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamp
- discharge
- reflector
- discharge lamp
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
Definitions
- the invention relates to a lighting system with a discharge lamp according to the The preamble of claim 1.
- European patent specification EP 0 334 208 describes one arranged in a reflector Discharge lamp, the discharge vessel of a cylindrical, glass Heat pitot tube is surrounded.
- the thermal pitot tube is provided with an ITO layer, to lower the color temperature of the lamp by approximately 600 Kelvin.
- the aforementioned discharge lamps have the disadvantage that their operation on one electronic control gear, which the lamp usually with a medium frequency Supply voltage in the range of approximately 20 KHz to 100 KHz Can interfere with the reception of radio equipment.
- the published patent application EP 0 767 340 A2 also describes a lighting system a discharge lamp, the lamp vessel with a translucent, electrical Is provided conductive layer, and with an operating device for the discharge lamp.
- the aforementioned layer is connected to a reference potential, for example by means of a conductor the earth potential, connected.
- the discharge lamp is also means Coaxial cable connected to the control gear, the outer conductor of the coaxial cable connected to the aforementioned translucent, electrically conductive layer is to ensure high frequency shielding.
- the discharge lamp of the lighting system has at least a translucent lamp vessel covering the discharge space of the discharge lamp encloses a lamp and electrical connections for their voltage supply.
- the at least one lamp vessel has a translucent, electrical conductive layer that at least encloses the discharge space of the lamp. Below the discharge space is only the one for gas discharge in the Lamp effective part of the interior of the at least one lamp vessel understood.
- the coating therefore extends at least over those parts of the vessel of the at least one lamp vessel, which enclose the discharge plasma.
- the translucent, electrically conductive Layer advantageously on the outer surface of the at least one lamp vessel applied.
- To ensure satisfactory electromagnetic compatibility To ensure the discharge lamp according to the invention is the specific one Surface resistance of the translucent, electrically conductive layer advantageously less than 100 hin per square.
- the specific surface resistance of an electrically conductive layer is usually measured with the help of two flat electrodes, which are applied to the layer to be measured so that they are facing each other are arranged opposite one another.
- the distance between the two measuring electrodes is the same size as the width of the measuring electrodes, so that between the two Measuring electrodes a square section of the layer to be measured is arranged.
- a current is given to the layer via the measuring electrodes Current intensity and the voltage drop across the measuring electrodes determined by means of a galvanometer.
- the quotient from the measured Voltage drop and the current strength of the impressed current results the specific surface resistance of the layer to be measured.
- the surface resistance of the layer is independent of the size the square area of the layer. It just depends on that Quotients from the specific electrical resistance of the layer material and the layer thickness.
- the unit of surface resistivity is usually referred to as ohms per square.
- the translucent, electrically conductive layer is advantageously as ITO layer, that is, formed as an indium tin oxide layer.
- a discharge lamp that is predominantly yellow, orange or red Light emitted.
- the layer thickness of the translucent, electrically conductive Layer is therefore advantageously chosen so that the coated lamp vessel one in the wavelength range from 550 nm to 700 nm high transparency, that is, a transmission coefficient of greater than 0.8.
- the thickness of the translucent, electrically conductive layer on the one hand, it must be sufficiently large to have sufficient electrical power To ensure conductivity, but also sufficient be small in order to still have sufficient light transmission.
- the discharge lamp is designed as a neon gas discharge lamp. This lamp produces predominantly orange or red light. You can therefore advantageously as Part of a lighting system in a motor vehicle, for generating the Flashing light or the tail and / or brake light can be used.
- the lighting system according to the invention has a discharge lamp and Operating device for the discharge lamp, the discharge lamp at least has a lamp vessel enclosing the discharge space of the lamp, which with a translucent, electrically conductive layer is provided, this Layer extends at least over the discharge space and to a predetermined one electrical reference potential, which is advantageously the circuit-internal ground potential of the control gear or the earth potential is connected.
- a predetermined one electrical reference potential which is advantageously the circuit-internal ground potential of the control gear or the earth potential is connected.
- the reflector of the lighting system according to the invention has a metallic or a metallized reflection surface.
- the reflector therefore also exercises a shielding effect on that of the discharge plasma in the discharge lamp generated electromagnetic radiation. It has turned out to be special proven advantageous, the reflector and possibly metallized parts of the lamp housing to improve the shielding also to the specified electrical To connect the reference potential.
- the layer thickness of the translucent, electrically conductive layer on the reflector or the interior of the Luminous wall areas of the at least one lamp vessel lower be carried out as on the wall areas of the at least facing away from the reflector a lamp vessel, and in this way the light transmission of the Reflector facing wall areas increases and the efficiency of the invention Lighting system can be improved.
- the at least one lamp vessel advantageously has a cylindrical vessel part and two in the direction of the reflector angled ends. This ensures that the dark ends the discharge lamp, which is equipped with the electrical connections of the lamp are not visible. Alternatively, the dark ends of the discharge lamp can also be moved to shaded areas of the lighting device.
- the discharge lamp shown in FIG. 1 is a neon gas discharge lamp.
- That lamp has a tubular, glass discharge vessel 1 with two rectangular ones, Ends angled in the same direction 1a.
- Electrode system 2 of the neon gas discharge lamp melted down gas-tight.
- the current leads protruding from the melting area 1aa 2a form the electrical connections of the lamp.
- the discharge vessel 1 has a circular cylindrical shape.
- the outer diameter of the discharge vessel 1 is approximately 5 mm.
- the distance between the power leads 2a which is approximately the length of the circular cylindrical discharge vessel part 1b corresponds to 308 mm.
- the angled ends 1a have a length of 36.2 mm.
- the outer surface of the discharge vessel 1 is provided with a so-called ITO layer 4 - this is an indium tin oxide layer - which extends over the entire discharge space 3 of the neon gas discharge lamp as far as the melting areas 1aa of the electrodes 2.
- the discharge space 3 is defined here by the ends of the two electrodes 2 on the discharge side and the inner diameter of the discharge vessel 1.
- the ITO layer 4 measured using the four-point measurement method, has a specific surface resistance of 14 ohms per square. It consists of 90 percent by weight indium oxide In 2 O 3 and 10 percent by weight tin oxide SnO 2 .
- the transmission curve 1 shows the light transmittance of the discharge vessel 1 with ITO layer 4 as a function of the wavelength; while the transmission curve 2 shows the light transmittance of the discharge vessel without ITO layer.
- the layer thickness of the ITO layer is coordinated in such a way that the transmission curve 1 has a transmission maximum at a wavelength of 600 nm, that is to say for red light which is emitted predominantly by the neon gas discharge lamp.
- the layer thickness of the ITO layer 4 is therefore approximately 300 nm.
- the transmission of the coated lamp vessel 1 is more than 80% of the light impinging on the inner wall of the discharge vessel 1, that is to say the transmission coefficient is in this wavelength range is greater than 0.8.
- a transmission coefficient of more than 0.85 is achieved.
- the neon gas discharge lamp described above is a component a lighting system, in particular a motor vehicle rear light and serves to generate a tail light and / or a brake light.
- this rear light also includes an electronic control gear for the neon gas discharge lamp and one trough-shaped reflector 5, which between the angled ends 1a Lamp is arranged.
- the circular cylindrical vessel part 1b of the discharge vessel 1 is arranged approximately in the optical axis of the reflector 5.
- the reflection surface 5a of the reflector 5 facing the lamp is metallic or metallized and with the internal circuit potential of the Control gear connected.
- the ITO layer 4 of the discharge vessel 1 is also connected to the internal circuit potential of the control gear.
- the lighting device also has a housing (not shown) on, the metallized parts also to the internal circuit potential are connected so that a star-shaped contact in at a common ground point.
- the ITO layer 4 On the reflector 5 facing Wall areas 10a of the discharge vessel 1 have the ITO layer 4 has a smaller layer thickness than that facing away from the reflector 5 Wall regions 10b of the discharge vessel 1.
- the layer thickness of the ITO layer 4 is on the wall areas facing away from the reflector 5 10b has a value of approx. 300 nm while it is on the reflector 5 facing wall areas 10a measures approximately 100 nm.
- ITO layer 4 does not have to cover the whole Extend discharge vessel 1. Suffice those wall areas of the discharge vessel 1, which the space between the discharge side Enclose ends of the two electrodes 2 to be provided with the ITO layer 4.
- the invention can also be applied to other types of discharge lamps, for example on low-pressure discharge lamps or on high-pressure discharge lamps and on lighting systems with a high-pressure discharge lamp such as one with a high pressure discharge lamp equipped automotive headlights can be applied.
- a high-pressure discharge lamp such as one with a high pressure discharge lamp equipped automotive headlights can be applied.
- it is a single-sided high-pressure discharge lamp, which is a discharge vessel enclosed by a glass outer bulb has, the outer bulb with a translucent, electrically conductive layer - preferably an ITO layer which extends over the entire discharge space of the lamp.
- the High-pressure discharge lamp is preferably part of a motor vehicle headlight and is operated on an electronic control gear.
- the translucent, electrically conductive layer on the outer bulb The high-pressure discharge lamp is connected to the internal circuit potential connected to the control gear.
- translucent, electrically conductive layers which consist of another material, for example of tin oxide SnO 2 or of tin oxide SnO 2 : F or SnO 2 : Sb doped with fluorine or antimony.
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Description
- Figur 1
- einen Längsschnitt durch eine Entladungslampe gemäß des bevorzugten Ausführungsbeispiels der Erfindung in schematischer Darstellung
- Figur 2
- einen Querschnitt durch die Entladungslampe gemäß Figur 1 mit einem Reflektor in schematischer Darstellung
- Figur 3
- Transmissionskurven für das unbeschichtete und das beschichtete Lampengefäß
Claims (2)
- Beleuchtungssystem mit einer Entladungslampe und einem Betriebsgerät für die Entladungslampe sowie einem Reflektor, wobeidie Entladungslampe mindestens ein lichtdurchlässiges, den Entladungsraum (3) der Entladungslampe umschließendes Lampengefäß (1), ein Leuchtmittel und elektrische Anschlüsse (2a) zu ihrer Spannungsversorgung aufweist,das Lampengefäß (1) eine lichtdurchlässige, elektrisch leitfähige Schicht (4) aufweist, die sich zumindest über den gesamten Entladungsraum (3) erstreckt,der Reflektor (5) eine metallische oder metallisierte Reflexionsfläche (5a) besitzt,das mindestens eine Lampengefäß (1) dem Reflektor (5) zugewandte Wandbereiche (10a) und vom Reflektor (5) abgewandte Wandbereiche (10b) besitzt, wobei die Schichtdicke der lichtdurchlässigen, elektrisch leitfähigen Schicht (4) auf den dem Reflektor (5) zugewandten Wandbereichen (10a) geringer als die Schichtdicke der lichtdurchlässigen, elektrisch leitfähigen Schicht (4) auf den vom Reflektor (5) abgewandten Wandbereichen (10b) ist.
- Beleuchtungssystem nach Anspruch 1, dadurch gekennzeichnet, dass der Reflektor (5) und die lichtdurchlässige, elektrisch leitfähige Schicht (4) an das schaltungsinterne elektrische Bezugspotential des Betriebsgerätes oder an das Erdpotential angeschlossen sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19844548 | 1998-09-29 | ||
DE19844548A DE19844548A1 (de) | 1998-09-29 | 1998-09-29 | Entladungslampe und Beleuchtungssystem mit einer Entladungslampe |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0991107A1 EP0991107A1 (de) | 2000-04-05 |
EP0991107B1 true EP0991107B1 (de) | 2004-01-28 |
Family
ID=7882589
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99112643A Expired - Lifetime EP0991107B1 (de) | 1998-09-29 | 1999-07-02 | Beleuchtungssystem mit einer Entladungslampe |
Country Status (8)
Country | Link |
---|---|
US (1) | US6153982A (de) |
EP (1) | EP0991107B1 (de) |
JP (1) | JP2000106010A (de) |
KR (1) | KR20000034948A (de) |
AT (1) | ATE258717T1 (de) |
CA (1) | CA2281191A1 (de) |
DE (2) | DE19844548A1 (de) |
HU (1) | HUP9903289A3 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1632985A1 (de) | 2004-09-07 | 2006-03-08 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Hochdruckentladungslampe |
US8013508B2 (en) | 2006-02-15 | 2011-09-06 | Osram Ag | High-pressure discharge lamp |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6404132B1 (en) | 2001-03-27 | 2002-06-11 | Liteglow Industries, Inc. | Neon cruising lights for use with motor vehicle headlights |
US6593706B1 (en) * | 2001-10-02 | 2003-07-15 | The Regents Of The University Of California | High pressure neon arc lamp |
BE1015302A3 (fr) * | 2003-01-10 | 2005-01-11 | Glaverbel | Vitrage comportant des composants electroniques. |
WO2004083900A2 (en) * | 2003-03-18 | 2004-09-30 | Philips Intellectual Property & Standards Gmbh | Gas discharge lamp |
ATE370517T1 (de) * | 2003-03-18 | 2007-09-15 | Koninkl Philips Electronics Nv | Gasentladungslampe |
DE102005007657A1 (de) * | 2005-02-19 | 2006-08-24 | Hella Kgaa Hueck & Co. | Gasentladungslampe, insbesondere für Kraftfahrzeugscheinwerfer |
DE102005007660A1 (de) * | 2005-02-19 | 2006-08-24 | Hella Kgaa Hueck & Co. | Brenner für eine Gasentladungslampe |
DE102005007672A1 (de) * | 2005-02-19 | 2006-09-07 | Hella Kgaa Hueck & Co. | Brenner für eine Gasentladungslampe |
DE102005007658A1 (de) * | 2005-02-19 | 2006-08-24 | Robert Bosch Gmbh | Brenner für eine Gasentladungslampe und Verfahren zur Herstellung eines solchen Brenners |
DE102005007679A1 (de) * | 2005-02-19 | 2006-08-31 | Hella Kgaa Hueck & Co. | Brenner für eine Gasentladungslampe mit Zuleitungen |
DE102005007678A1 (de) * | 2005-02-19 | 2006-09-07 | Hella Kgaa Hueck & Co. | Brenner für eine Gasentladungslampe mit Vorheizung |
US20070247850A1 (en) * | 2006-03-28 | 2007-10-25 | Kenall Manufacturing Co. | Lighting Fixture with EMI/RFI Shield |
US7772749B2 (en) * | 2007-05-01 | 2010-08-10 | General Electric Company | Wavelength filtering coating for high temperature lamps |
TWI417474B (zh) * | 2010-05-31 | 2013-12-01 | 明志科技大學 | 可降低電磁輻射的燈泡與燈具 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
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US3932783A (en) * | 1969-01-02 | 1976-01-13 | Sylvania Electric Products Inc. | Fluorescent lamp containing indium oxide |
NL7610170A (nl) * | 1976-09-14 | 1978-03-16 | Philips Nv | Lagedrukkwikdampontladingslamp. |
JPS559309A (en) * | 1978-07-03 | 1980-01-23 | Tokyo Shibaura Electric Co | Light illuminating bulb |
US4227113A (en) * | 1978-10-18 | 1980-10-07 | Duro-Test Corporation | Incandescent electric lamp with partial light transmitting coating |
GB2126006B (en) * | 1982-08-19 | 1985-11-27 | Gen Electric Co Plc | Cathodoluminescent light sources |
NL8205025A (nl) * | 1982-12-29 | 1984-07-16 | Philips Nv | Gasontladingslamp. |
US5003214A (en) * | 1986-12-19 | 1991-03-26 | Gte Products Corporation | Metal halide lamp having reflective coating on the arc tube |
DE8803881U1 (de) | 1988-03-22 | 1988-05-11 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De | |
CA2017471C (en) * | 1989-07-19 | 2000-10-24 | Matthew Eric Krisl | Optical interference coatings and lamps using same |
US5287258A (en) * | 1990-04-04 | 1994-02-15 | Robert Bosch Gmbh | Headlamp for motor vehicles |
JPH0443547A (ja) * | 1990-06-08 | 1992-02-13 | Toshiba Lighting & Technol Corp | 自動車用照明装置および放電ランプ |
US5239238A (en) * | 1991-05-08 | 1993-08-24 | U.S. Philips Corporation | Electrodeless low-pressure mercury vapour discharge lamp |
US5420481A (en) | 1993-09-27 | 1995-05-30 | Smiths Industries | Fluorescent lamp with wide range of luminous intensities |
GB9326123D0 (en) * | 1993-12-22 | 1994-02-23 | Ge Lighting Ltd | Electrodeless fluorescent lamp |
GB9405371D0 (en) * | 1994-03-18 | 1994-05-04 | Ge Lighting Ltd | Electrodeless fluorescent lamp |
US5702179A (en) * | 1995-10-02 | 1997-12-30 | Osram Sylvania, Inc. | Discharge lamp having light-transmissive conductive coating for RF containment and heating |
DE69707620T2 (de) * | 1996-04-19 | 2002-08-01 | Koninkl Philips Electronics Nv | Elektrodenlose niederdruckentladungsröhre |
JP3635849B2 (ja) * | 1997-04-07 | 2005-04-06 | ウシオ電機株式会社 | 希ガス放電灯 |
-
1998
- 1998-09-29 DE DE19844548A patent/DE19844548A1/de not_active Withdrawn
-
1999
- 1999-07-02 EP EP99112643A patent/EP0991107B1/de not_active Expired - Lifetime
- 1999-07-02 AT AT99112643T patent/ATE258717T1/de not_active IP Right Cessation
- 1999-07-02 DE DE59908400T patent/DE59908400D1/de not_active Expired - Lifetime
- 1999-08-23 US US09/379,427 patent/US6153982A/en not_active Expired - Fee Related
- 1999-08-26 CA CA002281191A patent/CA2281191A1/en not_active Abandoned
- 1999-09-28 JP JP11274777A patent/JP2000106010A/ja active Pending
- 1999-09-28 KR KR1019990041466A patent/KR20000034948A/ko not_active Application Discontinuation
- 1999-09-28 HU HU9903289A patent/HUP9903289A3/hu unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1632985A1 (de) | 2004-09-07 | 2006-03-08 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Hochdruckentladungslampe |
US8013508B2 (en) | 2006-02-15 | 2011-09-06 | Osram Ag | High-pressure discharge lamp |
Also Published As
Publication number | Publication date |
---|---|
HUP9903289A3 (en) | 2000-05-29 |
CA2281191A1 (en) | 2000-03-29 |
DE59908400D1 (de) | 2004-03-04 |
EP0991107A1 (de) | 2000-04-05 |
DE19844548A1 (de) | 2000-03-30 |
JP2000106010A (ja) | 2000-04-11 |
ATE258717T1 (de) | 2004-02-15 |
US6153982A (en) | 2000-11-28 |
KR20000034948A (ko) | 2000-06-26 |
HU9903289D0 (en) | 1999-11-29 |
HUP9903289A2 (hu) | 2000-04-28 |
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