EP0344732A1 - Lampe à décharge aux halogénures métalliques - Google Patents

Lampe à décharge aux halogénures métalliques Download PDF

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Publication number
EP0344732A1
EP0344732A1 EP89109784A EP89109784A EP0344732A1 EP 0344732 A1 EP0344732 A1 EP 0344732A1 EP 89109784 A EP89109784 A EP 89109784A EP 89109784 A EP89109784 A EP 89109784A EP 0344732 A1 EP0344732 A1 EP 0344732A1
Authority
EP
European Patent Office
Prior art keywords
sodium
gallium
iodine
halide
chlorine
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
Application number
EP89109784A
Other languages
German (de)
English (en)
Other versions
EP0344732B1 (fr
Inventor
Klaus Dr. Hilpert
Dietrich Dr. Fromm
Jürgen Seehawer
Jürgen Heider
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.)
Forschungszentrum Juelich GmbH
Osram GmbH
Original Assignee
Forschungszentrum Juelich GmbH
Kernforschungsanlage Juelich GmbH
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 Forschungszentrum Juelich GmbH, Kernforschungsanlage Juelich GmbH, Osram GmbH filed Critical Forschungszentrum Juelich GmbH
Publication of EP0344732A1 publication Critical patent/EP0344732A1/fr
Application granted granted Critical
Publication of EP0344732B1 publication Critical patent/EP0344732B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps
    • 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

Definitions

  • the invention relates to metal halide discharge lamps with a filling containing sodium and gallium halide and in particular comprises a discharge lamp for room lighting with high luminous efficacy.
  • Metal halide discharge lamps contain different metal halides as fillings.
  • it is crucial to achieve the highest possible sodium concentration in the core of the discharge, without putting excessive thermal stress on the burner wall.
  • the required low color temperature is achieved by the intensive radiation of the Na resonance line pair at 590 nm.
  • additional metal halides which form gaseous heterocomplexes with the sodium halide also used, has proven to be an effective measure for such a concentration increase.
  • Such heterocomplexes can have a higher vapor pressure than the pure sodium halide over the burner wall and then lead to the desired increase in sodium concentration in the arc core.
  • DE-OS 20 59 577 describes a discharge lamp which contains sodium and indium in a molar ratio of 0.05 to 0.8.
  • a reinforcing effect is to be achieved in particular by aluminum halides, Na / Al molar ratios of 0.3 to 10 being preferred.
  • such lamps should contain at least one of the metals Na, Li, K, Cs, Ca, Sr, Ba and possibly Cd, Ga, In, TI, Sn, Sc, Y and rare earths.
  • a discharge lamp which contains sodium halide and tin in addition to mercury and noble gas, the Na / Sn molar ratios in particular should be between 0.01 and 50.
  • discharge lamps which contain mercury, argon and In (possibly replaced by Ga), Na, Li, Sn (possibly replaced by Al), halogen and TI, in which for complex formation with sodium halide, in addition to the indium (or gallium) halides present, essentially halogen compounds of the elements tin and / or aluminum are to be effective.
  • a Na / In (Ga) molar ratio of 0.012 to 4 1 8 is calculated from the range limits given.
  • the lamp filling given as an example contains, in addition to Ar, Hg, HgJ, TIJ and LiJ, the compounds NaJ, InJ and SnJz, where Na to In in a molar ratio of 0.81.
  • Such lamps can be designed with a warm light color that is attractive for room lighting, so that in view of the high luminous efficacy an application in this regard should be of great interest.
  • Mixtures with approximately equal molar parts of NaCl and GaC1 3 have particularly high Na reinforcements.
  • the light color can be varied by changing the molar ratio.
  • relatively low Na / Ga molar ratios will be selected within the defined range; the usual rare earth additives can be dispensed with in such lamps.
  • the amplification effect achieved by the complex formation is of general interest for metal halide discharge lamps.
  • a certain proportion of the halogen component should be formed by iodide (in particular at least 5%, preferably> 10%), but then the reinforcing one Effect is reduced, so that depending on the application, a certain upper limit should not be exceeded.
  • lamps that only contain iodide also prove useful, which would be particularly important for a warm light color.
  • the metal halide discharge lamps of the type mentioned at the outset are accordingly characterized in that sodium and gallium are present as mixed halides of chlorine and iodine, bromine and iodine or chlorine, bromine and iodine, the iodine content of the halogen of which is at most 85 at% and the molar ratio of sodium to gallium is over 1.
  • iodide-containing mixtures are provided whose corrosivity is reduced.
  • the iodine content of the halogen should preferably be above 40 at%, in particular between 50 and 80 at%.
  • the molar ratio of sodium halide to gallium halide which is expediently selected and which is chosen in particular in the range from 1 to 19 is also subject to limiting influences: on the one hand, the desired sodium gain is hardly achieved by an excessively low proportion of gallium, while, on the other hand, excessively high gallium proportions via the gallium resonance lines mentioned in the blue spectral range lead to an undesirable increase in color temperature. Molar ratios of Na to Ga from 2 to 8, in particular around the value 3, are therefore preferred.
  • the lamps according to the invention such as lithium, thallium, zinc, cadmium, indium, tin, rare earth elements, etc., are more or less reduced in the form of halides orderly amounts, as they are usually used in metal halide discharge lamps.
  • thallium halide is particularly suitable in order to bring the color coordinates X and Y of the arc radiation as close as possible to those of the Planckian radiator.
  • a color point above the Planck curve causes a green cast of the emitted light, while below the Planck curve (too small Y values) there is an unnatural reddish color impression.
  • FIG. 1 shows the discharge vessel 1 made of quartz glass and the outer bulb 2 surrounding it.
  • the isothermally designed discharge vessel has a maximum inner diameter of 9 mm, an electrode spacing of 7 mm and an inner volume of approximately 0.7 cm 3 .
  • the electrodes are helical.
  • the ends of the discharge vessel 1 are provided with a zirconium dioxide coating 3 reflecting the heat radiation.
  • the discharge vessel shown was provided with the following fillings in addition to the ignition gas Ar (80 mbar)

Landscapes

  • Discharge Lamp (AREA)
EP19890109784 1988-06-03 1989-05-31 Lampe à décharge aux halogénures métalliques Expired - Lifetime EP0344732B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3818966 1988-06-03
DE3818966 1988-06-03

Publications (2)

Publication Number Publication Date
EP0344732A1 true EP0344732A1 (fr) 1989-12-06
EP0344732B1 EP0344732B1 (fr) 1994-10-26

Family

ID=6355809

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890109784 Expired - Lifetime EP0344732B1 (fr) 1988-06-03 1989-05-31 Lampe à décharge aux halogénures métalliques

Country Status (2)

Country Link
EP (1) EP0344732B1 (fr)
DE (1) DE58908551D1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0800201A3 (fr) * 1996-04-04 1998-01-28 Heraeus Noblelight GmbH Radiateur excimère à longue durée de vie, procédé sa fabrication et pour l'allongement de sa durée de vie ausi que dispositif pour la mise en oeuvre de ses procédés
KR100351338B1 (ko) * 1994-10-26 2002-11-18 파텐트-트로이한트-게젤샤프트 퓌어 엘렉트리쉐 글뤼람펜 엠베하 포토광학용금속할로겐화물방전램프
WO2004049386A3 (fr) * 2002-11-26 2004-09-30 Philips Intellectual Property Lampe a decharge haute pression a chlorure de mercure a teneur limitee en chlore

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100405527C (zh) * 2005-06-01 2008-07-23 广东雪莱特光电科技股份有限公司 一种小功率金属卤化物放电灯

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772557A (en) * 1971-05-11 1973-11-13 Iwasaki Electric Co Ltd Electric discharge lamps
US3832591A (en) * 1973-04-30 1974-08-27 Westinghouse Electric Corp High luminous efficacy white appearing lamp
GB2023339A (en) * 1978-06-19 1979-12-28 Thorn Electrical Ind Ltd Light source for Super 8 mm cine projector
GB1598269A (en) * 1977-06-04 1981-09-16 Philips Nv High pressure mercury vapour discharge lamp

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3772557A (en) * 1971-05-11 1973-11-13 Iwasaki Electric Co Ltd Electric discharge lamps
US3832591A (en) * 1973-04-30 1974-08-27 Westinghouse Electric Corp High luminous efficacy white appearing lamp
GB1598269A (en) * 1977-06-04 1981-09-16 Philips Nv High pressure mercury vapour discharge lamp
GB2023339A (en) * 1978-06-19 1979-12-28 Thorn Electrical Ind Ltd Light source for Super 8 mm cine projector

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100351338B1 (ko) * 1994-10-26 2002-11-18 파텐트-트로이한트-게젤샤프트 퓌어 엘렉트리쉐 글뤼람펜 엠베하 포토광학용금속할로겐화물방전램프
EP0800201A3 (fr) * 1996-04-04 1998-01-28 Heraeus Noblelight GmbH Radiateur excimère à longue durée de vie, procédé sa fabrication et pour l'allongement de sa durée de vie ausi que dispositif pour la mise en oeuvre de ses procédés
US5889367A (en) * 1996-04-04 1999-03-30 Heraeus Noblelight Gmbh Long-life high powered excimer lamp with specified halogen content, method for its manufacture and extension of its burning life
WO2004049386A3 (fr) * 2002-11-26 2004-09-30 Philips Intellectual Property Lampe a decharge haute pression a chlorure de mercure a teneur limitee en chlore
US7282862B2 (en) 2002-11-26 2007-10-16 Koninklijke Philips Electronics, N.V. High-pressure discharge lamp with mercury chloride having a limited chlorine content

Also Published As

Publication number Publication date
DE58908551D1 (de) 1994-12-01
EP0344732B1 (fr) 1994-10-26

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