EP1482534A2 - Beleuchtungsanordnung bestehend aus einer Gasentladungslampe und einer Abschirmhülse - Google Patents
Beleuchtungsanordnung bestehend aus einer Gasentladungslampe und einer Abschirmhülse Download PDFInfo
- Publication number
- EP1482534A2 EP1482534A2 EP04009233A EP04009233A EP1482534A2 EP 1482534 A2 EP1482534 A2 EP 1482534A2 EP 04009233 A EP04009233 A EP 04009233A EP 04009233 A EP04009233 A EP 04009233A EP 1482534 A2 EP1482534 A2 EP 1482534A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamp
- shielding sleeve
- lighting arrangement
- gas discharge
- arrangement according
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
- H01J61/523—Heating or cooling particular parts of the lamp
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
-
- 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
- H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
Definitions
- the present invention relates to a lighting arrangement consisting of a elongated gas discharge lamp and one for the gas discharge lamp provided shielding consists.
- the present invention relates Invention a shielding sleeve for a low-pressure discharge lamp.
- the temperature of the lamps must be within a predetermined range lie.
- T16 lamps their name obtained due to the fact that their tube has a diameter of 16mm
- the optimum temperature range is 40-44 ° C.
- T16 lamps have, in contrast to the likewise known T26 lamps with a wider lamp diameter different lengths Supply lines to the lamp electrodes.
- This asymmetric Design of a T16 lamp with respect to its electrodes leads to that at these lamps the cool spot comes to rest at the end where the longer Electrode lead is placed, or at which the distance of the electrode to the Front end of the lamp is larger.
- the cool spot is the symmetrically designed T26 lamps always in the middle of the lamp.
- T16 lamps are more temperature sensitive than T26 lamps.
- the present invention is therefore the object of the known To improve shielding for fluorescent lamps so that with them too low ambient temperatures of the cool spot in an optimal Temperature range are maintained and thus the lamp a sufficiently high Can achieve luminous flux.
- Shielding sleeve designed such that it at least partially made of a material with a good thermal conductivity or a layer of such having good thermally conductive material.
- the shielding at least partially consists of a reflective material or has a reflective layer.
- the shielding sleeve is configured such that it has both properties - So both a good thermal conductivity as well as the ability to reflect electromagnetic radiation - having, for example achieved thereby can be that the shielding at least partially made of metal, especially preferably made of aluminum or a corresponding metal or Aluminum layer has.
- both properties mentioned above contribute to an optimized temperature shield of the lamp over the Environment.
- one Shielding sleeve with high thermal conductivity contributes to that in the adjacent Area of the cool spot of the lamp higher temperature on the area of the Cool To transfer spots.
- the shielding itself is heated and desirably conducts this heat to the lamp in the area of the Cool spots over.
- the shielding sleeve have a high thermal conductivity, these being at least in the range of thermal conductivity of metals should lie.
- the thermal conductivity of lead which is about 35 W / mK.
- the material used should therefore be a Have thermal conductivity of greater than or equal to 30 W / mK.
- the preferred used aluminum even has a conductivity of 220 W / mK.
- the sleeve can be made of one - preferably transparent - plastic existing basic body consist of at least over a portion of its length or even the entire length with a Layer is coated from a reflective and / or thermally conductive material.
- the shield completely off to form the thermally conductive and / or reflective material.
- the shielding sleeve obtained in this way is then at the front end of the Gas discharge lamp is arranged, where the cool spot is located. As already has been mentioned, this is the end of the T16 lamps where the Lamp electrode is located with the longer electrical leads.
- the Shielding sleeve can be arranged in such a way that, although the electrical Supply lines, but not the lamp electrode itself surrounds. This will despite the - when using metal - opaque shielding sleeve achieved sufficiently high luminous flux. At particularly low However, ambient temperatures can also be used for sleeves which completely surround the electrode due to their length.
- the shielding sleeve according to the invention is preferably for use with Low-pressure discharge lamps provided, in particular for use in the T16 lamps described above.
- the lighting arrangement shown in Figs. 1a and 1b consists of a cylindrical elongated gas discharge lamp 1 and one on a front end of the Lamp 1 pushed shielding 10.
- the illustrated lamp 1 acts it is a low-pressure discharge lamp, in particular a T16 lamp, whose lamp body 4 has a diameter of 16 mm.
- a special feature of the illustrated T16 lamp 1 is that the electrical Feed lines 3a and 3b for the two lamp electrodes 2a and 2b different are long.
- the cool spot is the lamp 1, so the area at which the lamp 1 in normal operation their lowest temperature has, arranged at the left end of the lamp 1.
- the Shielding sleeve 10 postponed.
- the Shielding sleeve 10 made entirely of aluminum.
- the shielding sleeve 10 is so in relation to the Lamp 1 arranged that they are the leads 3a for the lamp electrode 2a surrounds, but not the electrode 2a itself. This ensures that the of the lamp 1 emitted light flux through the opaque aluminum not is impaired.
- the length of the shielding sleeve 10 determines the degree of achievable Temperature increase. There is thus the possibility of choosing the length the shielding sleeve 10 different ambient temperature ranges set at where the shielding 10 achieved the appropriate effects. In other words, it different lengths shielding 10 can be provided, each Sleeve is optimal for a different ambient temperature range.
- a shielding sleeve 10 made of aluminum has a length 35-50 mm, with the area pushed over the base 10mm long and the area surrounding the glass bulb 4 approx. 25-40mm, especially 30-35 mm long.
- the wall thickness of the glass bulb 4 enclosing portion of the sleeve 10 is between 0.5mm and 2mm, preferably at about 1mm. It has been shown that with an aluminum sleeve, which has a wall thickness of 1mm and a total length of 40mm, the Temperature at which the lamp can be operated under optimal conditions, can be reduced by about 15 °.
- FIGS. 2 and 3 show the shielding sleeve 10 in a lateral view and in FIG Front view. This has - as shown in Fig. 2 - one of the shape of the lamp corresponding inner contour, so that they fit on the front end of the lamp can be put on.
- the shielding sleeve 10 is in the present case made entirely of aluminum, contrary to the original presumption that such an aluminum sleeve has a rather cooling effect, surprisingly has that even with a completely made of aluminum shielding sleeve particularly good results can be achieved. This is attributed to that the aluminum sleeve not only the heat generated at the lamp electrode reflected back, but also warmed up and the heat in desired manner on the lamp in the area of the cool spot.
- the possibility of the shielding sleeve from a - preferably transparent - plastic to form existing body, the inside with an aluminum layer or with another layer of a material, the one has high thermal conductivity of at least 30 W / mK and has a reflective effect, is covered.
- the possibility to provide shielding sleeves of different lengths, each for different Ambient temperature ranges are suitable.
- the present invention thus provides a simple possibility a cooling of a gas discharge lamp, in particular a Low pressure discharge lamp to prevent.
- the temperature shield by the Shielding sleeve according to the invention is even so good that T16 lamps even at very low ambient temperatures below 25 ° C even at optimum Temperatures can be operated.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Abstract
Description
- Fig. 1a
- eine erfindungsgemäße Beleuchtungsanordnung bestehend aus einer länglichen Gasentladungslampe mit einer erfindungsgemäßen Abschirmhülse in seitlicher Ansicht;
- Fig. 1b
- die in Fig. 1a dargestellte Beleuchtungsanordnung im Schnitt;
- Fig. 2
- eine Abschirmhülse gemäß der vorliegenden Erfindung in seitlicher Ansicht; und
- Fig. 3
- eine Stirnansicht der in Fig. 2 dargestellten Abschirmhülse.
Claims (24)
- Beleuchtungsanordnung, aufweisend
eine zylinderartige längliche Gasentladungslampe (1), an deren beiden Stirnenden jeweils eine in das Innere des Lampenkörpers ragende Lampenelektrode (2a, 2b) sowie entsprechende elektrische Zuleitungen (3a, 3b) angeordnet sind, sowie
eine eines der beiden Stirnenden der Lampe (1) umgebende Abschirmhülse (10),
dadurch gekennzeichnet, dass die Abschirmhülse (10) zumindest teilweise aus einem Material mit einer guten Wärmeleitfähigkeit besteht oder eine Schicht aus einem derartigen wärmeleitfähigen Material aufweist. - Beleuchtungsanordnung, aufweisend
eine zylinderartige längliche Gasentladungslampe (1), an deren beiden Stirnenden jeweils eine in das Innere des Lampenkörpers ragende Lampenelektrode (2a, 2b) sowie entsprechende elektrische Zuleitungen (3a, 3b) angeordnet sind, sowie
eine eines der beiden Stirnenden der Lampe (1) umgebende Abschirmhülse (10),
dadurch gekennzeichnet, dass die Abschirmhülse (10) zumindest teilweise aus einem reflektierenden Material besteht oder eine reflektierende Schicht aufweist. - Beleuchtungsanordnung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass die Abschirmhülse (10) zumindest teilweise aus Metall besteht oder eine Metallschicht aufweist. - Beleuchtungsanordnung nach Anspruch 3,
dadurch gekennzeichnet, dass es sich bei dem Metall um Aluminium handelt. - Beleuchtungsanordnung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, dass die Abschirmhülse (10) vollständig aus dem wärmeleitfähigen und/oder reflektierenden Material besteht. - Beleuchtungsanordnung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass die Abschirmhülse (10) aus einem aus Kunststoff bestehenden Grundkörper besteht, der zumindest über einen Teil seiner Länge hinweg mit einer Schicht des wärmeleitfähigen und/oder reflektierenden Materials überzogen ist. - Beleuchtungsanordnung nach Anspruch 6,
dadurch gekennzeichnet, dass die Schicht des wärmeleitfähigen und/oder reflektierenden Materials den Grundkörper über die gesamte Länge hinweg überdeckt. - Beleuchtungsanordnung nach Anspruch 6 oder 7,
dadurch gekennzeichnet, dass der Grundkörper aus einem transparenten Kunststoff besteht. - Beleuchtungsanordnung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, dass die Abschirmhülse (10) derart in Bezug auf die Gasentladungslampe (1) angeordnet ist, dass sie lediglich die elektrischen Zuleitungen (3a, 3b) der entsprechenden Lampenelektrode (2a, 2b) umgibt, nicht jedoch die Lampenelektrode (2a, 2b) selbst. - Beleuchtungsanordnung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, dass die elektrischen Zuleitungen (3a, 3b) für die Lampenelektroden (2a, 2b) unterschiedlich lang sind, wobei die Abschirmhülse (10) an dem Stirnende der Lampenelektrode (2a, 2b) mit den längeren elektrischen Zuleitungen (3a, 3b) angeordnet ist. - Beleuchtungsanordnung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, dass es sich bei der Gasentladungslampe um eine Niederdruckentladungslampe (1) handelt. - Beleuchtungsanordnung nach Anspruch 11,
dadurch gekennzeichnet, dass es sich bei der Gasentladungslampe um eine T16-Lampe handelt. - Beleuchtungsanordnung nach einem der vorherigen Ansprüche,
dadurch gekennzeichnet, dass die Abschirmhülse (10) eine Länge von ca. 35-50 mm aufweist, wobei der Bereich, der den Glaskolben (4) der Lampe (1) umschließt ca. 25-40 mm, insbesondere 30-35 mm lang ist. - Beleuchtungsanordnung nach Anspruch 13,
dadurch gekennzeichnet, dass der den Glaskolben (4) der Lampe (1) umschließende Bereich der Abschirmhülse (10) eine Wandstärke zwischen 0,5 mm und 2 mm, insbesondere von ca. 1 mm aufweist. - Abschirmhülse (10) zur Verwendung bei einer zylinderartigen länglichen Gasentladungslampe (1), an deren beiden Stirnenden jeweils eine in das Innere des Lampenkörpers ragende Lampenelektrode (2a, 2b) sowie entsprechende elektrische Zuleitungen (3a, 3b) angeordnet sind,
wobei die Abschirmhülse (10) bezüglich der Gasentladungslampe (1) derart anzuordnen ist, dass sie eines der beiden Stirnenden umgibt,
dadurch gekennzeichnet, dass die Abschirmhülse (10) zumindest teilweise aus einem Material mit einer guten Wärmeleitfähigkeit besteht oder eine Schicht aus einem derartigen wärmeleitfähigen Material aufweist. - Abschirmhülse (10) zur Verwendung bei einer zylinderartigen länglichen Gasentladungslampe (1), an deren beiden Stirnenden jeweils eine in das Innere des Lampenkörpers ragende Lampenelektrode (2a, 2b) sowie entsprechende elektrische Zuleitungen (3a, 3b) angeordnet sind,
wobei die Abschirmhülse (10) bezüglich der Gasentladungslampe (1) derart anzuordnen ist, dass sie eines der beiden Stirnenden umgibt,
dadurch gekennzeichnet, dass die Abschirmhülse (10) zumindest teilweise aus einem reflektierenden Material besteht oder eine reflektierende Schicht aufweist. - Abschirmhülse nach Anspruch 15 oder 16,
dadurch gekennzeichnet, dass diese zumindest teilweise aus Metall besteht oder eine Metallschicht aufweist. - Abschirmhülse nach Anspruch 17,
dadurch gekennzeichnet, dass es sich bei dem Metall um Aluminium handelt. - Abschirmhülse nach einem der Ansprüche 15 bis 18,
dadurch gekennzeichnet, dass diese vollständig aus dem wärmeleitfähigen und/oder reflektierenden Material besteht. - Abschirmhülse nach einem der Ansprüche 15 bis 18,
dadurch gekennzeichnet, dass diese aus einem aus Kunststoff bestehenden Grundkörper besteht, der zumindest über einen Teil seiner Länge hinweg mit einer Schicht des wärmeleitfähigen und/oder reflektierenden Materials überzogen ist. - Abschirmhülse nach Anspruch 20,
dadurch gekennzeichnet, dass die Schicht des wärmeleitfähigen und/oder reflektierenden Materials den Grundkörper über die gesamte Länge hinweg überdeckt. - Abschirmhülse nach Anspruch 20 oder 21,
dadurch gekennzeichnet, dass der Grundkörper aus einem transparenten Kunststoff besteht. - Abschirmhülse nach einem der Ansprüche 15 bis 22,
dadurch gekennzeichnet, dass die Abschirmhülse (10) eine Länge von ca. 35-50 mm aufweist, wobei der Bereich, der den Glaskolben (4) der Lampe (1) umschließt, ca. 25-40 mm, insbesondere 30-35 mm lang ist. - Abschirmhülse nach Anspruch 23,
dadurch gekennzeichnet, dass der den Glaskolben (4) der Lampe (1) umschließende Bereich der Abschirmhülse (10) eine Wandstärke zwischen 0,5 mm und 2 mm, insbesondere von ca. 1 mm aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20307607U DE20307607U1 (de) | 2003-05-15 | 2003-05-15 | Beleuchtungsanordnung bestehend aus einer Gasentladungslampe und einer Abschirmhülse |
DE20307607U | 2003-05-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1482534A2 true EP1482534A2 (de) | 2004-12-01 |
EP1482534A3 EP1482534A3 (de) | 2007-12-05 |
EP1482534B1 EP1482534B1 (de) | 2016-12-07 |
Family
ID=33039387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04009233.0A Expired - Lifetime EP1482534B1 (de) | 2003-05-15 | 2004-04-19 | Beleuchtungsanordnung bestehend aus einer Gasentladungslampe und einer Abschirmhülse |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1482534B1 (de) |
DE (1) | DE20307607U1 (de) |
NO (1) | NO20042016L (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008048909A1 (de) * | 2008-09-26 | 2010-04-01 | Zumtobel Lighting Gmbh | Leuchte mit geschlossenem Leuchtengehäuse |
DE102010053654B4 (de) | 2010-12-06 | 2013-03-07 | Bundesrepublik Deutschland, vertreten durch das Bundesministerium für Wirtschaft und Technologie, dieses vertreten durch den Präsidenten der Physikalisch-Technischen Bundesanstalt | Beleuchtungseinrichtung |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2905960A1 (de) * | 1978-05-12 | 1979-11-15 | Egyesuelt Izzolampa | Elektrisches entladungsrohr - insbesondere auch in freier luftatmosphaere betreibbare hochdruck-natriumdampflampe und halogendampflampe - mit einer vorrichtung zur beeinflussung der temperaturverteilung des entladungsraumes |
DE3112962A1 (de) * | 1981-04-01 | 1982-10-14 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | "leuchte fuer leuchtstofflampen mit einem schutzrohr" |
US4360758A (en) * | 1981-01-23 | 1982-11-23 | Westinghouse Electric Corp. | High-intensity-discharge lamp of the mercury-metal halide type which efficiently illuminates objects with excellent color appearance |
DE3304857A1 (de) * | 1982-02-16 | 1983-09-22 | Kombinat Veb Narva, Ddr 1017 Berlin | Niederdruckgasentladungslampe, insbesondere leuchtstofflampe kleiner leistung |
JP2000348678A (ja) * | 1999-03-26 | 2000-12-15 | Matsushita Electric Works Ltd | メタルハライドランプ及び放電灯点灯装置 |
US6242851B1 (en) * | 1998-05-07 | 2001-06-05 | Matsushita Electric Works Research And Development Laboratory Inc | Dimmable metal halide lamp without color temperature change |
US6359376B1 (en) * | 1998-09-18 | 2002-03-19 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | Fluorescent lamp having asymmetric electrodes inside the discharge tube |
Family Cites Families (12)
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DE1957978C3 (de) * | 1969-11-18 | 1980-07-10 | Patra Patent Treuhand | Natriumdampfhochdruck- oder Halogeiunetalldampfentladungslampe |
US3851200A (en) * | 1972-12-11 | 1974-11-26 | Gen Electric | Heat and light reflective coating on quartz lamp |
US3963951A (en) * | 1975-06-20 | 1976-06-15 | Gte Sylvania Incorporated | Metal halide discharge lamp having a reflective coating |
DE2535921A1 (de) * | 1975-08-12 | 1977-03-03 | Patra Patent Treuhand | Quecksilberdampf-hochdruckentladungslampe mit zusatz von metallhalogeniden fuer horizontale brennlage |
US4446397A (en) * | 1981-09-28 | 1984-05-01 | General Electric Company | High intensity discharge lamp with infrared reflecting means for improving efficacy |
EP0101519B1 (de) * | 1982-02-10 | 1986-12-30 | Mitsubishi Denki Kabushiki Kaisha | Metal-dampf entladungs lampe |
DD258099A1 (de) * | 1984-03-16 | 1988-07-06 | Narva Rosa Luxemburg Buero F S | Elektrische lampe mit einer lichtdurchlaessigen infrarotreflektierenden einrichtung |
DE3829729A1 (de) * | 1988-09-01 | 1990-03-15 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Hochdruckentladungslampe |
US5536991A (en) * | 1994-09-13 | 1996-07-16 | General Electric Company | Lamp having silica protective coating |
US5952768A (en) * | 1994-10-31 | 1999-09-14 | General Electric Company | Transparent heat conserving coating for metal halide arc tubes |
US5680000A (en) * | 1995-11-07 | 1997-10-21 | Osram Sylvania Inc. | Reflective metal heat shield for metal halide lamps |
DE19843418A1 (de) * | 1998-09-22 | 2000-03-23 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Hochdruckentladungslampe und zugehöriges Beleuchtungssystem |
-
2003
- 2003-05-15 DE DE20307607U patent/DE20307607U1/de not_active Expired - Lifetime
-
2004
- 2004-04-19 EP EP04009233.0A patent/EP1482534B1/de not_active Expired - Lifetime
- 2004-05-14 NO NO20042016A patent/NO20042016L/no not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2905960A1 (de) * | 1978-05-12 | 1979-11-15 | Egyesuelt Izzolampa | Elektrisches entladungsrohr - insbesondere auch in freier luftatmosphaere betreibbare hochdruck-natriumdampflampe und halogendampflampe - mit einer vorrichtung zur beeinflussung der temperaturverteilung des entladungsraumes |
US4360758A (en) * | 1981-01-23 | 1982-11-23 | Westinghouse Electric Corp. | High-intensity-discharge lamp of the mercury-metal halide type which efficiently illuminates objects with excellent color appearance |
DE3112962A1 (de) * | 1981-04-01 | 1982-10-14 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | "leuchte fuer leuchtstofflampen mit einem schutzrohr" |
DE3304857A1 (de) * | 1982-02-16 | 1983-09-22 | Kombinat Veb Narva, Ddr 1017 Berlin | Niederdruckgasentladungslampe, insbesondere leuchtstofflampe kleiner leistung |
US6242851B1 (en) * | 1998-05-07 | 2001-06-05 | Matsushita Electric Works Research And Development Laboratory Inc | Dimmable metal halide lamp without color temperature change |
US6359376B1 (en) * | 1998-09-18 | 2002-03-19 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh | Fluorescent lamp having asymmetric electrodes inside the discharge tube |
JP2000348678A (ja) * | 1999-03-26 | 2000-12-15 | Matsushita Electric Works Ltd | メタルハライドランプ及び放電灯点灯装置 |
Also Published As
Publication number | Publication date |
---|---|
EP1482534B1 (de) | 2016-12-07 |
EP1482534A3 (de) | 2007-12-05 |
NO20042016L (no) | 2004-11-16 |
DE20307607U1 (de) | 2004-09-23 |
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Legal Events
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