EP1187174A2 - Niederdruckgasentladungslampe mit indiumhaltiger Gasfüllung - Google Patents
Niederdruckgasentladungslampe mit indiumhaltiger Gasfüllung Download PDFInfo
- Publication number
- EP1187174A2 EP1187174A2 EP01000430A EP01000430A EP1187174A2 EP 1187174 A2 EP1187174 A2 EP 1187174A2 EP 01000430 A EP01000430 A EP 01000430A EP 01000430 A EP01000430 A EP 01000430A EP 1187174 A2 EP1187174 A2 EP 1187174A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- gas discharge
- low
- indium
- discharge lamp
- 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.)
- Withdrawn
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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
- H01J61/12—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
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
- H01J65/048—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using an excitation coil
Definitions
- the invention relates to a low-pressure gas discharge lamp which has a gas discharge vessel, which contains a gas filling, with electrodes and with means for production and maintaining a low pressure gas discharge.
- the generation of light in low-pressure gas discharge lamps is based on the fact that charge carriers, especially electrons, but also ions, through an electric field between the Electrodes of the lamp are accelerated so much that they are in the gas filling of the lamp stimulate them by collisions with the gas atoms or molecules of the gas filling or ionize.
- charge carriers especially electrons, but also ions
- Conventional low-pressure gas discharge lamps contain mercury in the gas filling and also have a fluorescent coating on the inside of the gas discharge vessel. It is a disadvantage of mercury low pressure gas discharge lamps that mercury vapor primarily radiation in the high-energy but invisible UV-C range of emits electromagnetic spectrum, which is only in the visible much lower energy radiation must be converted. The The energy difference is converted into unwanted heat radiation.
- the mercury in the gas filling is also reinforced as environmentally harmful and viewed as a toxic substance in modern mass products due to environmental hazards when using. Production and disposal should be avoided if possible should.
- a low-pressure gas discharge lamp is known from GB 2 014 358 A.
- a discharge vessel, electrodes and a filling comprising at least one copper halide contains as LTV emitter.
- This low-pressure gas discharge lamp containing copper halide emits in the visible range as well as in the UV range at 324.75 and 327.4 nm
- a low-pressure gas discharge lamp equipped with a gas discharge vessel, which is a gas filling with an indium compound and contains a buffer gas, with electrodes and with means for generating and Maintenance of a low pressure gas discharge.
- a molecular gas discharge at low pressure takes place in the lamp according to the invention instead, the radiation in the visible and near UVA range of the electromagnetic spectrum emits.
- the radiation contains in addition to the characteristic lines of the indium 410 and 451 nm also have a wide continuum in the range of 320 to 450 nm. Because it is the radiation of a molar discharge is the exact location of the continuum due to the type of indium compound, any other additives and lamp pressure and operating temperature controllable.
- the lamp according to the invention has a visual efficiency that is considerably higher than that of conventional low-pressure mercury discharge lamps.
- the visual efficiency expressed in lumens / watt, is the ratio between the Brightness of the radiation in a certain visible wavelength range and Generation energy for the radiation.
- the high visual efficiency of the invention Lamp means that a certain amount of light is realized through less power consumption becomes.
- the lamp according to the invention is advantageously used as a UV-A lamp for Sunbeds, disinfection lights and paint curing lights.
- the lamp is combined with appropriate phosphors. Because the Losses due to Stoke's displacement are small, you get visible light with a high luminous efficacy of more than 100 lumens / watt.
- the indium compound is selected from the group of halides, oxides, chalcogenides, hydroxides, Hydrides and the organometallic compounds of indium.
- Gas filling with indium halides is particularly preferred.
- a further improved efficiency is achieved when the gas filling is a mixture of two Contains indium halides.
- the gas filling be a compound as a further additive thallium, selected from the group of halides, oxides, chalcogenides, hydroxides, Hydride and the organometallic compounds of thallium, contains. you receives a gas discharge with a wide continuous spectrum.
- the gas filling can advantageously also be a halide selected from contain the halides of copper and alkali metals.
- the gas filling as a buffer gas can be an inert gas, selected from the group consisting of helium, neon, argon, krypton and xenon.
- the gas pressure of the noble gas at operating temperature is advantageously 2 to 10 mbar, in particular 3.4 mbar.
- the gas discharge vessel has a phosphor coating on the outer surface.
- the UVA radiation which is emitted by the low-pressure gas discharge lamp according to the invention, is not absorbed by the common types of glass, but passes through the walls of the discharge vessel almost without loss.
- the fluorescent coating can therefore be applied to the outside of the gas discharge vessel. This simplifies the manufacturing process.
- the gas filling Indium halide with a partial pressure of 1.0 to 30.0 ⁇ bar, thallium halide with a partial pressure of ⁇ 1.0 ⁇ bar and argon with a partial pressure of 2 to 10 mbar contains.
- the pressure specifications are based on the respective operating temperature.
- FIG. 1 schematically shows the light generation in a low-pressure gas discharge lamp a gas filling containing an indium (I) compound.
- the low-pressure gas discharge lamp according to the invention from a tubular lamp bulb 1, which has a discharge space surrounds. At both ends of the tube electrodes 2 are melted inside, via which the Gas discharge can be ignited.
- the low pressure gas discharge lamp has the Version and the base 3. In the version or in the base is known in itself Way integrated an electrical ballast that ignites and operates the gas discharge lamp regulates. In a further embodiment, not shown in FIG. 1 the low-pressure gas discharge lamp can also be operated via an external ballast and be regulated.
- the gas discharge vessel can also be used as a multiple folded or coiled tube executed and surrounded by an outer bulb.
- the wall of the gas discharge vessel preferably consists of a type of glass that is suitable for UVA radiation with a wavelength between 320 and 450 nm is transparent.
- the gas filling consists of an indium halide in an amount of 1 to 10 ⁇ g / cm 3 and an inert gas.
- the noble gas serves as a buffer gas and facilitates the ignition of the gas discharge.
- the preferred buffer gas is argon.
- Argon can be replaced in whole or in part by another noble gas, such as helium, neon, krypton or xenon.
- the lumen efficiency can be significantly improved become.
- Another way to increase efficiency is to use two or two to combine more indium halides in the gas atmosphere
- the cold filling pressure of the buffer gas is a maximum of 10 mbar. Is preferred a range between 1.0 and 2.5 mbar.
- the operating temperature of the lamp has checked the operating temperature of the lamp by appropriate proven constructive measures.
- the diameter and length of the lamp are chosen so that an internal temperature during operation at an outside temperature of 25 ° C from 170 to 285 ° C is reached.
- This internal temperature refers to the coldest point of the gas discharge vessel, as a temperature gradient is caused by the discharge arises in the vessel.
- the gas discharge vessel can also be used with IR radiation reflective layer can be coated.
- Infrared radiation is preferred reflective coating made of indium-doped tin oxide.
- the temperature is the coldest point should be at 220 to 285 ° C, preferably at 255 ° C.
- a suitable material for the electrodes in the low-pressure gas discharge lamp according to the invention consists for example of nickel or a nickel alloy or a refractory metal, especially tungsten and tungsten alloys. Also Composite materials made of tungsten with thorium oxide or indium oxide are suitable.
- the gas discharge vessel of the lamp is on it Outside surface coated with a phosphor layer 4.
- the emitted UV radiation the gas discharge stimulates the phosphors in the phosphor layer to emit light in the visible area 5.
- the chemical composition of the phosphor layer determines the spectrum of the Light or its color.
- the materials that can be used as phosphors must be absorb the generated radiation and in a suitable wavelength range z. B. for the three primary colors red, blue and green emit and a high fluorescence quantum yield to reach.
- Suitable luminescent materials and luminescent material combinations do not have to be on the inside of the gas discharge vessel can be applied, but can also be on the outside be applied because the radiation generated in the UVA range from the usual Glass types are not absorbed.
- the lamp is a capacitive with a high frequency field excited lamp, in which the electrodes on the outside of the gas discharge vessel are attached.
- the lamp is an inductive one with a high-frequency field excited lamp.
- the electrons emitted by the electrodes excite the Atoms and molecules of the gas filling to emit UV radiation from the characteristic radiation and a continuum between 320 to 450 nm.
- the discharge heats the gas filling so that the desired vapor pressure and the desired one Operating temperature of 170 to 285 ° C is reached, at which the luminous efficacy is optimal.
- the radiation generated during operation of the gas filling containing indium halide mostly coexists the line spectrum of the elemental indium at 410 nm and 451 nm an intense, broad, continuous molecular spectrum between 340 and 420 nm molecular discharge of the indium halide is caused.
- the area of maximum Emission of the continuous molecular spectrum shifts to longer wavelengths with increasing molecular weight of the indium halide
- a cylindrical discharge vessel made of a glass that is transparent to UVA radiation, with a length of 15 cm and a diameter of 2.5 cm with internal electrodes made of tungsten.
- the discharge vessel will be evacuated and at the same time 0.3 mg indium bromide metered in.
- argon becomes cold with a pressure of 1.7 mbar filled.
- AC power is supplied from an external AC power source and measured the lumen efficiency at an operating temperature of 225 ° C. The lumen efficiency is 100 Lm / W.
- a cylindrical discharge vessel made of a glass that is transparent to UVA radiation, with a length of 15 cm and a diameter of 2.5 cm is with external electrodes made of copper.
- the discharge vessel will be evacuated and at the same time dosed for the gas filling indium bromide, indium iodide and argon, so that at operating temperature a partial pressure of 5.0 to 15.0 ⁇ bar for indium bromide, 0.5 to 1.5 ⁇ bar for Indium iodide and 5.0 mbar for argon is reached.
- a cylindrical discharge vessel made of a glass that is transparent to UVA radiation, with a length of 15 cm and a diameter of 2.5 cm with internal electrodes made of tungsten.
- the discharge vessel is evacuated and at the same time for the Gas filling indium bromide, thallium iodide and argon metered in so that at operating temperature a partial pressure of 1.0 to 10.0 ⁇ bar for indium bromide, ⁇ 1 ⁇ bar for thallium iodide and 5.0 mbar for argon is reached.
- An AC power is supplied from an external AC power source and the lumen efficiency of 90 Im / W was measured at an operating temperature of 210 ⁇ 10 ° C.
Landscapes
- Discharge Lamp (AREA)
Abstract
Description
Im Rahmen der vorliegenden Erfindung kann es bevorzugt sein, dass das Gasentladungsgefäß einen Leuchtstoffüberzug auf der äußeren Oberfläche aufwsist. Die UVA-Strahlung, die von der erfindungsgemäßen Niederdruckgasentladungslampe abgestrahlt wird, wird von den gängigen Glassorten nicht absorbiert, sondern passiert die Wände des Entladungsgefäßes nahezu verlustfrei. Der Leuchtstoffüberzug kann deshalb auf der Außenseite des Gasentladungsgefäßes angebracht werden. Dadurch wird das Herstellungsverfahren vereinfacht.
Claims (12)
- Niederdruckgasentladungslampe, ausgerüstet mit einem Gasentladungsgefäß, das eine Gasfüllung mit einer Indiumverbindung und einem Puffergas enthält, mit Elektroden und mit Mitteln zur Erzeugung und Aufrechterhaltung einer Niederdruckgasentladung.
- Niederdruckgasentladungslampe gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Indiumverbindungen ausgewählt ist aus der Gruppe der Halogenide, Oxide, Chalkogenide, Hydroxide, Hydride und der metallorganischen Verbindungen des Indiums sind - Niederdruckgasentladungslampe gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Indiumverbindungen ausgewählt ist aus der Gruppe der Halogenide - Niederdruckgasentladungslampe gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Gasfüllung ein Gemisch aus zwei Indiumhalogeniden enthält. - Niederdruckgasentladungslampe gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Gasfüllung als ein weiteres Additiv eine Verbindung des Thalliums, ausgewählt aus der Gruppe der Halogenide, Oxide, Chalkogenide, Hydroxide, Hydride und der metallorganischen Verbindungen des Thalliums, enthält. - Niederdruckgasentladungslampe gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Gasfüllung als ein weiteres Additiv ein Halogenid, ausgewählt aus den Haloganiden des Kupfers und der Alkalimetalle enthält. - Niederdruckgasentladungslampe gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Gasfüllung ein Halogenid des Indiums und ein Halogenid des Thalliums im molaren Verhältnis 1:1 enthält. - Niederdruckgasentladungslampe gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Gasfüllung als Puffergas ein Edelgas, ausgewählt aus der Gruppe Helium, Neon, Argon, Krypton und Xenon, umfasst. - Niederdruckgasentladungslampe gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Gasfüllung als Puffergas ein Edelgas, ausgewählt aus der Gruppe Helium, Neon, Argon, Krypton und Xenon, mit einem Gasdruck bei Betriebstemperatur von 2 bis 10 mbar umfasst. - Niederdruckgasentladungslampe gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Gasfüllung als Puffergas ein Edelgas, ausgewählt aus der Gruppe Helium, Neon, Argon, Krypton und Xenon, mit einem Gasdruck bei Betriebstemperatur von 3.4 mbar umfasst. - Niederdruckgasentladungslampe gemäß Anspruch 1,
dadurch gekennzeichnet, dass das Gasentladungsgefäß einen Leuchtstoffüberzug auf der äußeren Oberfläche aufweist. - Niederdruckgasentladungslampe gemäß Anspruch 1,
dadurch gekennzeichnet, dass die Gasfüllung Indiumhalogenid mit einem Partialdruck von 1.0 bis 10.0 µbar, Thalliumhalogenid mit einem Partialdruck <1.0 µbar und Argon mit einem Partialdruck von 2 bis 10 mbar enthält.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10044562 | 2000-09-08 | ||
DE10044562A DE10044562A1 (de) | 2000-09-08 | 2000-09-08 | Niederdruckgasentladungslampe mit quecksilberfreier Gasfüllung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1187174A2 true EP1187174A2 (de) | 2002-03-13 |
EP1187174A3 EP1187174A3 (de) | 2006-03-29 |
Family
ID=7655583
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01000430A Withdrawn EP1187174A3 (de) | 2000-09-08 | 2001-09-06 | Niederdruckgasentladungslampe mit indiumhaltiger Gasfüllung |
Country Status (5)
Country | Link |
---|---|
US (1) | US6972521B2 (de) |
EP (1) | EP1187174A3 (de) |
JP (1) | JP2002124211A (de) |
CN (1) | CN1342994A (de) |
DE (1) | DE10044562A1 (de) |
Cited By (5)
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WO2002103748A1 (en) * | 2001-06-19 | 2002-12-27 | Koninklijke Philips Electronics N.V. | Low-pressure gas discharge lamp with a mercury-free gas filling |
WO2004011846A1 (en) | 2002-07-25 | 2004-02-05 | Philips Intellectual Property & Standards Gmbh | Lamp system with green-blue gas-discharge lamp and yellow-red led |
WO2005045881A1 (en) * | 2003-11-11 | 2005-05-19 | Koninklijke Philips Electronics N.V. | Low-pressure vapor discharge lamp with a mercury-free gas filling |
WO2006043204A2 (en) * | 2004-10-19 | 2006-04-27 | Koninklijke Philips Electronics N.V. | Sun-tanning lamp with white light having high color rendering index |
WO2007085972A1 (en) * | 2006-01-24 | 2007-08-02 | Koninklijke Philips Electronics N.V. | Assembly for generating ultraviolet radiation, and tanning device comprising such as assembly |
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DE10204691C1 (de) * | 2002-02-06 | 2003-04-24 | Philips Corp Intellectual Pty | Quecksilberfreie Hochdruckgasentladungslampe und Beleuchtungseinheit mit einer solchen Hochdruckgasentladungslampe |
DE10242049A1 (de) | 2002-09-11 | 2004-03-25 | Philips Intellectual Property & Standards Gmbh | Niederdruckgasentladungslampe mit zinnhaltiger Gasfüllung |
DE10242245A1 (de) * | 2002-09-12 | 2004-03-25 | Philips Intellectual Property & Standards Gmbh | Niederdruckgasentlastungslampe mit einem Erdalkalioxidgemisch als Elektronen-Ermittersubstanz |
DE10242241A1 (de) * | 2002-09-12 | 2004-03-25 | Philips Intellectual Property & Standards Gmbh | Niederdruckgasentladungslampe mit Ba TiO3-ähnlichen Elektronen-Ermittersubstanzen |
WO2004075242A1 (ja) * | 2003-02-18 | 2004-09-02 | Tadahiro Ohmi | 蛍光管及びその製造方法 |
US20060214590A1 (en) * | 2003-08-07 | 2006-09-28 | Koninklijke Philips Electronics N.V. | Low-pressure gas discharge lamp with alkaline eart chalcogenides as electron emitter material |
JP2007507844A (ja) * | 2003-09-30 | 2007-03-29 | 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 | 酸素および水分を固定化する手段を有する低圧ガス放電ランプ |
US20070222389A1 (en) * | 2004-05-27 | 2007-09-27 | Koninklijke Philips Electronics, N.V. | Low Pressure Discharge Lamp Comprising a Discharge Maintaining Compound |
US20080258623A1 (en) * | 2004-05-27 | 2008-10-23 | Koninklijke Philips Electronics, N.V. | Low Pressure Discharge Lamp Comprising a Metal Halide |
US7265493B2 (en) * | 2004-10-04 | 2007-09-04 | General Electric Company | Mercury-free compositions and radiation sources incorporating same |
WO2006043200A1 (en) * | 2004-10-19 | 2006-04-27 | Koninklijke Philips Electronics N.V. | Low-pressure gas discharge lamp for backlighting with a large color gamut |
WO2006043191A1 (en) * | 2004-10-20 | 2006-04-27 | Philips Intellectual Property & Standards Gmbh | High intensity discharge lamp |
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US20060132043A1 (en) * | 2004-12-20 | 2006-06-22 | Srivastava Alok M | Mercury-free discharge compositions and lamps incorporating gallium |
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US20060290284A1 (en) * | 2005-06-28 | 2006-12-28 | Osram Sylvania Inc. | Lamp with phosphor layer on an exterior surface and method of applying the phosphor layer |
EP1905062A2 (de) * | 2005-06-29 | 2008-04-02 | Philips Intellectual Property & Standards GmbH | Niederdruckentladungslampe mit molekularstrahler und zusatz dafür |
WO2007132368A2 (en) * | 2006-05-15 | 2007-11-22 | Koninklijke Philips Electronics N.V. | Low-pressure gas discharge lamp having improved efficiency |
US8282986B2 (en) * | 2006-05-18 | 2012-10-09 | Osram Sylvania, Inc. | Method of applying phosphor coatings |
US8994288B2 (en) | 2013-03-07 | 2015-03-31 | Osram Sylvania Inc. | Pulse-excited mercury-free lamp system |
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2000
- 2000-09-08 DE DE10044562A patent/DE10044562A1/de not_active Withdrawn
-
2001
- 2001-09-05 CN CN01135724.XA patent/CN1342994A/zh active Pending
- 2001-09-06 EP EP01000430A patent/EP1187174A3/de not_active Withdrawn
- 2001-09-07 JP JP2001271244A patent/JP2002124211A/ja active Pending
- 2001-09-07 US US09/947,777 patent/US6972521B2/en not_active Expired - Fee Related
Patent Citations (5)
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US3678315A (en) * | 1969-12-13 | 1972-07-18 | Philips Corp | Low-pressure sodium vapor discharge lamp |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002103748A1 (en) * | 2001-06-19 | 2002-12-27 | Koninklijke Philips Electronics N.V. | Low-pressure gas discharge lamp with a mercury-free gas filling |
WO2004011846A1 (en) | 2002-07-25 | 2004-02-05 | Philips Intellectual Property & Standards Gmbh | Lamp system with green-blue gas-discharge lamp and yellow-red led |
WO2005045881A1 (en) * | 2003-11-11 | 2005-05-19 | Koninklijke Philips Electronics N.V. | Low-pressure vapor discharge lamp with a mercury-free gas filling |
WO2006043204A2 (en) * | 2004-10-19 | 2006-04-27 | Koninklijke Philips Electronics N.V. | Sun-tanning lamp with white light having high color rendering index |
WO2006043204A3 (en) * | 2004-10-19 | 2006-06-22 | Koninkl Philips Electronics Nv | Sun-tanning lamp with white light having high color rendering index |
WO2007085972A1 (en) * | 2006-01-24 | 2007-08-02 | Koninklijke Philips Electronics N.V. | Assembly for generating ultraviolet radiation, and tanning device comprising such as assembly |
Also Published As
Publication number | Publication date |
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DE10044562A1 (de) | 2002-03-21 |
US6972521B2 (en) | 2005-12-06 |
CN1342994A (zh) | 2002-04-03 |
JP2002124211A (ja) | 2002-04-26 |
US20020047525A1 (en) | 2002-04-25 |
EP1187174A3 (de) | 2006-03-29 |
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