WO2003043054A2 - High-pressure discharge lamp - Google Patents

High-pressure discharge lamp Download PDF

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Publication number
WO2003043054A2
WO2003043054A2 PCT/IB2002/004662 IB0204662W WO03043054A2 WO 2003043054 A2 WO2003043054 A2 WO 2003043054A2 IB 0204662 W IB0204662 W IB 0204662W WO 03043054 A2 WO03043054 A2 WO 03043054A2
Authority
WO
WIPO (PCT)
Prior art keywords
lamp
glow starter
pressure discharge
incandescent lamp
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.)
Ceased
Application number
PCT/IB2002/004662
Other languages
French (fr)
Other versions
WO2003043054A3 (en
Inventor
Hendrik A. Van Esveld
Johan L. V. Hendrix
Gerardus M. J. F. Luijks
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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 Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Priority to EP02779831A priority Critical patent/EP1449237A2/en
Priority to AU2002343163A priority patent/AU2002343163A1/en
Priority to JP2003544791A priority patent/JP2005510013A/en
Priority to US10/495,287 priority patent/US7132800B2/en
Publication of WO2003043054A2 publication Critical patent/WO2003043054A2/en
Publication of WO2003043054A3 publication Critical patent/WO2003043054A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/06—Starting switches thermal only
    • H05B41/08—Starting switches thermal only heated by glow discharge

Definitions

  • the invention relates to a high-pressure discharge lamp provided with a discharge vessel that is enclosed, with an interspace, by an outer bulb, the end of which is provided with a lamp cap, which lamp also has an ignition circuit comprising a series connection of a glow starter and an ohmic impedance.
  • a lamp of the type mentioned in the heading is known from GB 1596161.
  • An advantageous aspect of a lamp with a built-in ignition circuit is the possibility that the lamp is in principle suitable as a retrofit lamp for an installation designed for a high-pressure mercury discharge lamp.
  • Modem high-pressure discharge lamps such as, for example, high-pressure sodium lamps and metal halide lamps have a very high ignition voltage and consequently require that the ignition circuit generates a high ignition pulse, for example of a magnitude of at least 2.5kV.
  • This is easy to realize with a known glow starter.
  • the glow starter is provided with electrodes, which close under the influence of heat development, for example as a result of a glow discharge in the starter itself, which also leads to a short-circuit in the series connection.
  • Another disadvantage of the known lamp is that, if it fails to ignite, the ignition circuit keeps generating ignition pulses for a long time, accompanied by a continuous load on the ohmic impedance and generation of EMI signals, which may lead to unsafe situations.
  • a lamp of the type mentioned in the heading is characterized according to the invention in that the ohmic impedance is formed by a halogen incandescent lamp. Since an incandescent filament, for example in the form of an incandescent coil, of an incandescent lamp is meant to assume a high temperature, and since it is also included in a bulb filled with halogen, the incandescent lamp is adequately resistant to a relatively long and relatively great dissipation of the incandescent body.
  • halogen incandescent lamp can also function as a UV-enhancer.
  • the use of a UV-enhancer has a very favorable effect on a fast and reliable ignition of the high-pressure discharge lamp. This is especially favorable for metal halide lamps, whose ignition behavior is strongly influenced by the presence of free electrons.
  • metal halide lamp should preferably be provided with a discharge vessel with a ceramic wall. The advantage of this construction is that a favorable ignition behavior is combined with very good photometric properties, such as a high luminous flux and stable color properties.
  • the series connection also comprises a bimetal switch that is closed in the cold condition.
  • a bimetal switch that is closed in the cold condition.
  • the series connection can be switched off electrically as soon as the lamp is ignited, for example under the influence of the heat generated by the discharge.
  • ignition pulses will not be generated until the bimetal switch has cooled to such an extent that it has closed. This prevents un unnecessary load on the ignition circuit.
  • the mutual o ⁇ entation of the glow starter and the halogen incandescent lamp should preferably be such that the heat produced by the halogen incandescent lamp is at least partly intercepted by the glow starter.
  • the halogen incandescent lamp produces heat during ignition of the high-pressure discharge lamp,.
  • a suitable mutual orientation of the incandescent lamp and the glow starter, the two lying next to each other, causes a substantial part of the heat produced by the incandescent lamp to be supplied to the glow starter.
  • a continuous supply of heat to the glow starter will lead to closure of the electrodes after a time interval has elapsed.
  • the advantage of this is that the further heat development in the halogen incandescent lamp keeps the electrodes of the glow starter closed, so that any further generation of ignition pulses is blocked.
  • a good heat transfer from the halogen incandescent lamp to the glow starter can be realized in particular if the spacing between the two is limited.
  • the distance between a housing of the incandescent lamp and the glow starter is no more than 6 cm, preferably 2 cm or smaller.
  • the halogen incandescent lamp and the glow starter are placed mainly parallel to each other. This improves the efficiency of the heat transfer to the glow starter.
  • effective results are also obtained when an incandescent lamp and a glow starter are positioned transversely to each other.
  • the incandescent lamp and the glow starter are positioned in such a way that the electrodes of the glow starter close after a burning time of the halogen incandescent lamp of between 15 and approximately 40 seconds.
  • FIG. 1 shows a lamp according to the invention
  • Fig. 2 is a circuit diagram of the lamp of Fig. 1.
  • Fig. 1, 1 is a high-pressure discharge lamp provided with a discharge vessel 2, enclosed with an interspace 3 by an outer bulb 4, the end of which is provided with a lamp cap 5, which lamp is also provided with an ignition circuit 30, comprising a series connection of a glow starter 35, an ohmic impedance 10 in the form of a halogen incandescent lamp, and a bimetal switch 36.
  • the glow starter is provided with electrodes 40, 41 which close under the influence of heat generation, for example as a result of a glow discharge in the starter itself, which also leads to a short-circuit in the series connection.
  • Both ends of the discharge vessel 2 are provided with a projecting plug 18, 19, which contain a feed-through between internal electrodes 8, 9 and lead wires 28, 29.
  • the lead wires are electrically connected to electric contacts 26, 27 of the lamp cap 5.
  • the lamp 1 is connected by its electric contacts 26, 27 and via a stabilization ballast 100 to a power source VB in a manner usual per se.
  • the series connection of the ignition circuit 30 is constructed in such a way that the orientation between the glow starter 35 and the incandescent lamp 10 is such that the heat produced by the incandescent lamp 10 is at least partly intercepted by the glow starter 35.
  • the supply of heat to the glow starter 35 under the influence of the halogen incandescent lamp will lead to a closure of the electrodes 40, 41 of the glow starter 35 after a time interval has elapsed.
  • the orientation of the series connection is also such that the bimetal switch 36 is placed at such a large distance from the incandescent lamp 10 that no heat or only a very limited amount of heat will reach the bimetal switch 36, so that the correct functioning of the bimetal switch will not be affected.
  • the lamp is a high-pressure sodium lamp with a rated wattage of 400W.
  • the lamp is connected via a ballast of the type BSN 400L 33, make Philips, to a power source of 220V, 50Hz.
  • the lamp is a metal halide lamp with a rated wattage of 400W.
  • the discharge vessel of the lamp has a ceramic wall. The filling of the discharge vessel consists of Hg and Na, as well as iodides of Tl, Dy, Ca, Ho, and Tm, and Xe as a starting gas.
  • the lamp is suitable for operation on a power source via a ballast of the type MH 400W CWA 71A6091.
  • the ballast can be connected to a 60Hz power source with a voltage of between 120V and 277V, and supplies a voltage of 135V to its lamp connections.
  • the halogen incandescent lamp that is part of the ignition circuit integrated in the lamp is a 230V, 150W type halogen-a lamp, make Philips.
  • the halogen incandescent lamp has a quartz glass housing. This gives the lamp an excellent heat resistance. The advantage of this is that there is a great degree of freedom as regards the location of the halogen incandescent lamp in the outer bulb.
  • the glow starter for example of the known type retrolux, make Philips, and the halogen incandescent lamp are located in such a way that the distance between the housing of the incandescent lamp and the glow starter is no more than 6 cm, preferably 2 cm or smaller.
  • the maximum value of the inrush current through the ignition circuit is found to be 5.8 A.
  • the average short-circuit current through the ignition circuit is 0.73 A. If the halogen incandescent lamp and the glow starter are located substantially parallel to each other with a spacing of 2 cm, the electrodes of the glow starter will close if the lamp does not ignite within 20 seconds, so that any further generation of ignition pulses is blocked. The time needed for closing the electrodes of the glow starter increases, under otherwise unchanging conditions, to just above 40 s ifthe spacing is 6 cm
  • the lamp is a metal halide lamp suitable for operation on a ballast of the type MH 175W CWA 71A5590, make Advance Transformer.
  • the incandescent lamp as part of the ignition circuit is of the same type as in the previous example.
  • the maximum current through the series connection is 4A in the present example, and the average short-circuit current through the ignition circuit is 0.69A.
  • the ignition pulse generated is more than 2.5kV.
  • the ignition circuit described is also subjected to a switching life test, in which the supply voltage is alternately switched on for 5 s and switched off for 35 s. After 2000 switching operations, the ignition pulse generated is still >2.5kV.

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

The invention relates to a high-pressure discharge lamp provided with a discharge vessel that is enclosed, with an interspace, by an outer bulb. The end of this outer bulb is provided with a lamp cap. The lamp has an ignition circuit comprising a series connection of a glow starter and an ohmic impedance. According to the invention, the ohmic impedance is formed by a halogen incandescent lamp.

Description

High-pressure discharge lamp
The invention relates to a high-pressure discharge lamp provided with a discharge vessel that is enclosed, with an interspace, by an outer bulb, the end of which is provided with a lamp cap, which lamp also has an ignition circuit comprising a series connection of a glow starter and an ohmic impedance.
A lamp of the type mentioned in the heading is known from GB 1596161. An advantageous aspect of a lamp with a built-in ignition circuit is the possibility that the lamp is in principle suitable as a retrofit lamp for an installation designed for a high-pressure mercury discharge lamp. Modem high-pressure discharge lamps such as, for example, high-pressure sodium lamps and metal halide lamps have a very high ignition voltage and consequently require that the ignition circuit generates a high ignition pulse, for example of a magnitude of at least 2.5kV. This is easy to realize with a known glow starter. The glow starter is provided with electrodes, which close under the influence of heat development, for example as a result of a glow discharge in the starter itself, which also leads to a short-circuit in the series connection. This results in the occurrence of relatively large currents in the ignition circuit, which are limited as much as possible by means of the ohmic impedance. A related consequence is, however, that the ohmic impedance must be relatively great and that a considerable dissipation takes place in the ohmic impedance. This is disadvantageous and necessitates the use of special high-power ohmic impedances, which raises the cost and is thus disadvantageous.
Another disadvantage of the known lamp is that, if it fails to ignite, the ignition circuit keeps generating ignition pulses for a long time, accompanied by a continuous load on the ohmic impedance and generation of EMI signals, which may lead to unsafe situations.
The invention has for its object to provide a means for counteracting the disadvantages described. To achieve this object, a lamp of the type mentioned in the heading is characterized according to the invention in that the ohmic impedance is formed by a halogen incandescent lamp. Since an incandescent filament, for example in the form of an incandescent coil, of an incandescent lamp is meant to assume a high temperature, and since it is also included in a bulb filled with halogen, the incandescent lamp is adequately resistant to a relatively long and relatively great dissipation of the incandescent body. The large-scale use of halogen incandescent lamps for lighting purposes over a wide power range also has the advantage that there is a large variety of such lamps, so that is easy for an expert to find a suitable halogen incandescent lamp, at a relatively low price, for use in the ignition circuit of the lamp according to the invention. Surprisingly, it has been found that the halogen incandescent lamp can also function as a UV-enhancer. The use of a UV-enhancer has a very favorable effect on a fast and reliable ignition of the high-pressure discharge lamp. This is especially favorable for metal halide lamps, whose ignition behavior is strongly influenced by the presence of free electrons. Such a metal halide lamp should preferably be provided with a discharge vessel with a ceramic wall. The advantage of this construction is that a favorable ignition behavior is combined with very good photometric properties, such as a high luminous flux and stable color properties.
Preferably, the series connection also comprises a bimetal switch that is closed in the cold condition. The advantage of this is that the series connection can be switched off electrically as soon as the lamp is ignited, for example under the influence of the heat generated by the discharge. Another advantage is that, after extinction of the lamp and reconnection of the supply voltage, ignition pulses will not be generated until the bimetal switch has cooled to such an extent that it has closed. This prevents un unnecessary load on the ignition circuit.
The mutual oπentation of the glow starter and the halogen incandescent lamp should preferably be such that the heat produced by the halogen incandescent lamp is at least partly intercepted by the glow starter. The halogen incandescent lamp produces heat during ignition of the high-pressure discharge lamp,. A suitable mutual orientation of the incandescent lamp and the glow starter, the two lying next to each other, causes a substantial part of the heat produced by the incandescent lamp to be supplied to the glow starter. A continuous supply of heat to the glow starter will lead to closure of the electrodes after a time interval has elapsed. The advantage of this is that the further heat development in the halogen incandescent lamp keeps the electrodes of the glow starter closed, so that any further generation of ignition pulses is blocked. A good heat transfer from the halogen incandescent lamp to the glow starter can be realized in particular if the spacing between the two is limited. In practice, it proves to be advantageous when the distance between a housing of the incandescent lamp and the glow starter is no more than 6 cm, preferably 2 cm or smaller. It is also preferable that the halogen incandescent lamp and the glow starter are placed mainly parallel to each other. This improves the efficiency of the heat transfer to the glow starter. However, effective results are also obtained when an incandescent lamp and a glow starter are positioned transversely to each other. Preferably, the incandescent lamp and the glow starter are positioned in such a way that the electrodes of the glow starter close after a burning time of the halogen incandescent lamp of between 15 and approximately 40 seconds.
The above-mentioned and other aspects of the invention will be explained in more detail below with reference to a drawing, in which Fig. 1 shows a lamp according to the invention, and
Fig. 2 is a circuit diagram of the lamp of Fig. 1.
In Fig. 1, 1 is a high-pressure discharge lamp provided with a discharge vessel 2, enclosed with an interspace 3 by an outer bulb 4, the end of which is provided with a lamp cap 5, which lamp is also provided with an ignition circuit 30, comprising a series connection of a glow starter 35, an ohmic impedance 10 in the form of a halogen incandescent lamp, and a bimetal switch 36. The glow starter is provided with electrodes 40, 41 which close under the influence of heat generation, for example as a result of a glow discharge in the starter itself, which also leads to a short-circuit in the series connection.
Both ends of the discharge vessel 2 are provided with a projecting plug 18, 19, which contain a feed-through between internal electrodes 8, 9 and lead wires 28, 29. The lead wires are electrically connected to electric contacts 26, 27 of the lamp cap 5.
In Fig. 2, the lamp 1 is connected by its electric contacts 26, 27 and via a stabilization ballast 100 to a power source VB in a manner usual per se. The series connection of the ignition circuit 30 is constructed in such a way that the orientation between the glow starter 35 and the incandescent lamp 10 is such that the heat produced by the incandescent lamp 10 is at least partly intercepted by the glow starter 35. The supply of heat to the glow starter 35 under the influence of the halogen incandescent lamp will lead to a closure of the electrodes 40, 41 of the glow starter 35 after a time interval has elapsed. The orientation of the series connection is also such that the bimetal switch 36 is placed at such a large distance from the incandescent lamp 10 that no heat or only a very limited amount of heat will reach the bimetal switch 36, so that the correct functioning of the bimetal switch will not be affected.
In a practical realization of a lamp according to the invention, the lamp is a high-pressure sodium lamp with a rated wattage of 400W. The lamp is connected via a ballast of the type BSN 400L 33, make Philips, to a power source of 220V, 50Hz. In another realization, the lamp is a metal halide lamp with a rated wattage of 400W. The discharge vessel of the lamp has a ceramic wall. The filling of the discharge vessel consists of Hg and Na, as well as iodides of Tl, Dy, Ca, Ho, and Tm, and Xe as a starting gas. The lamp is suitable for operation on a power source via a ballast of the type MH 400W CWA 71A6091. The ballast can be connected to a 60Hz power source with a voltage of between 120V and 277V, and supplies a voltage of 135V to its lamp connections. The halogen incandescent lamp that is part of the ignition circuit integrated in the lamp is a 230V, 150W type halogen-a lamp, make Philips. The halogen incandescent lamp has a quartz glass housing. This gives the lamp an excellent heat resistance. The advantage of this is that there is a great degree of freedom as regards the location of the halogen incandescent lamp in the outer bulb. The glow starter, for example of the known type retrolux, make Philips, and the halogen incandescent lamp are located in such a way that the distance between the housing of the incandescent lamp and the glow starter is no more than 6 cm, preferably 2 cm or smaller.
During ignition and operation of the practical lamp, the maximum value of the inrush current through the ignition circuit is found to be 5.8 A. The average short-circuit current through the ignition circuit, on the other hand, is 0.73 A. If the halogen incandescent lamp and the glow starter are located substantially parallel to each other with a spacing of 2 cm, the electrodes of the glow starter will close if the lamp does not ignite within 20 seconds, so that any further generation of ignition pulses is blocked. The time needed for closing the electrodes of the glow starter increases, under otherwise unchanging conditions, to just above 40 s ifthe spacing is 6 cm
In a further practical realization, the lamp is a metal halide lamp suitable for operation on a ballast of the type MH 175W CWA 71A5590, make Advance Transformer. The incandescent lamp as part of the ignition circuit is of the same type as in the previous example. The maximum current through the series connection is 4A in the present example, and the average short-circuit current through the ignition circuit is 0.69A.
In both practical realizations, the ignition pulse generated is more than 2.5kV.
The ignition circuit described is also subjected to a switching life test, in which the supply voltage is alternately switched on for 5 s and switched off for 35 s. After 2000 switching operations, the ignition pulse generated is still >2.5kV.
In another test, the lamp is ignited during and after a long time in the dark. This did not reveal any notable delay in ignition.

Claims

CLAIMS:
1. A high-pressure discharge lamp provided with a discharge vessel that is enclosed, with an interspace, by an outer bulb, the end of which is provided with a lamp cap, which lamp also has an ignition circuit comprising a series connection of a glow starter and an ohmic impedance, characterized in that the ohmic impedance is formed by a halogen incandescent lamp.
2. A high-pressure discharge lamp as claimed in claim 1, characterized in that the lamp is a metal halide lamp.
3. A high-pressure discharge lamp as claimed in claim 1 or 2, characterized in that the lamp has a discharge vessel with a ceramic wall.
4. A high-pressure discharge lamp as claimed in claim 1 or 2, characterized in that the series connection also comprises a bimetal switch that is closed in the cold condition.
5. A high-pressure discharge lamp as claimed in claim 1 or 2, characterized in that the mutual orientation of the glow starter and the halogen incandescent lamp is such that the heat produced by the halogen incandescent lamp is at least partly intercepted by the glow starter. ' ' *.
6. A high-pressure discharge lamp as claimed in claim 5, characterized in that the halogen incandescent lamp and the glow starter are placed substantially parallel to each other.
7. A high-pressure discharge lamp as claimed in claim 5, characterized in that the spacing between a housing of the incandescent lamp and the glow starter is no more than 6 cm, preferably 2 cm or smaller.
8. A high-pressure discharge lamp as claimed in claim 5, characterized in that the incandescent lamp and the glow starter are positioned in such a way that the electrodes of the glow starter close after a burning time of the halogen incandescent lamp of between 15 and 40 seconds.
PCT/IB2002/004662 2001-11-15 2002-11-05 High-pressure discharge lamp Ceased WO2003043054A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP02779831A EP1449237A2 (en) 2001-11-15 2002-11-05 High-pressure discharge lamp
AU2002343163A AU2002343163A1 (en) 2001-11-15 2002-11-05 High-pressure discharge lamp
JP2003544791A JP2005510013A (en) 2001-11-15 2002-11-05 High pressure discharge lamp
US10/495,287 US7132800B2 (en) 2001-11-15 2002-11-05 High-pressure discharge lamp

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP01204360.0 2001-11-15
EP01204360 2001-11-15

Publications (2)

Publication Number Publication Date
WO2003043054A2 true WO2003043054A2 (en) 2003-05-22
WO2003043054A3 WO2003043054A3 (en) 2003-10-23

Family

ID=8181239

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2002/004662 Ceased WO2003043054A2 (en) 2001-11-15 2002-11-05 High-pressure discharge lamp

Country Status (6)

Country Link
US (1) US7132800B2 (en)
EP (1) EP1449237A2 (en)
JP (1) JP2005510013A (en)
CN (1) CN1316553C (en)
AU (1) AU2002343163A1 (en)
WO (1) WO2003043054A2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016535725A (en) * 2013-10-08 2016-11-17 サントル・ナシオナル・ドゥ・ラ・ルシェルシュ・シアンティフィクＣｅｎｔｒｅ Ｎａｔｉｏｎａｌ Ｄｅ Ｌａｒｅｃｈｅｒｃｈｅ Ｓｃｉｅｎｔｉｆｉｑｕｅ Compound for preventing or treating dyslipidemia and composition containing the compound

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Publication number Priority date Publication date Assignee Title
DE102005061832A1 (en) * 2005-12-23 2007-06-28 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH High pressure discharge lamp with improved ignitability and high voltage pulse generator

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GB1596161A (en) * 1978-04-28 1981-08-19 Cates J Starting of high pressure sodium high presure mercury halide and low pressure sodium discharge lamps by means of glow type starter switches
NL7902573A (en) * 1979-04-03 1980-10-07 Philips Nv MIXING LIGHT.
US4268780A (en) * 1980-03-28 1981-05-19 Gte Products Corporation Integrated fluorescent-incandescent lamp assembly
DE3536385A1 (en) * 1984-10-12 1986-04-17 Kabushiki Kaisha Toshiba, Kawasaki, Kanagawa HIGH PRESSURE METAL STEAM DISCHARGE LAMP WITH STARTER ELEMENT
US4812714A (en) * 1987-10-22 1989-03-14 Gte Products Corporation Arc discharge lamp with electrodeless ultraviolet radiation starting source
US4987344A (en) * 1990-02-05 1991-01-22 Gte Products Corporation Arc discharge lamp with internal starter
JP2814833B2 (en) * 1992-04-10 1998-10-27 岩崎電気株式会社 High pressure steam discharge lamp with built-in starter
US5811933A (en) * 1996-07-11 1998-09-22 U.S. Philips Corporation High-pressure discharge lamp
DE69918628T2 (en) * 1998-04-17 2005-07-21 Koninklijke Philips Electronics N.V. IGNITION SWITCHING FOR DISCHARGE LAMPS
DE60016362T2 (en) * 1999-06-16 2005-10-27 Koninklijke Philips Electronics N.V. metal halide
WO2002013230A1 (en) * 2000-08-08 2002-02-14 Koninklijke Philips Electronics N.V. High-pressure discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016535725A (en) * 2013-10-08 2016-11-17 サントル・ナシオナル・ドゥ・ラ・ルシェルシュ・シアンティフィクＣｅｎｔｒｅ Ｎａｔｉｏｎａｌ Ｄｅ Ｌａｒｅｃｈｅｒｃｈｅ Ｓｃｉｅｎｔｉｆｉｑｕｅ Compound for preventing or treating dyslipidemia and composition containing the compound

Also Published As

Publication number Publication date
EP1449237A2 (en) 2004-08-25
CN1316553C (en) 2007-05-16
WO2003043054A3 (en) 2003-10-23
US20050012464A1 (en) 2005-01-20
JP2005510013A (en) 2005-04-14
US7132800B2 (en) 2006-11-07
AU2002343163A1 (en) 2003-05-26
CN1585995A (en) 2005-02-23

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