JP5818225B2 - Discharge lamp and discharge lamp device - Google Patents

Description

  Embodiments described herein relate generally to a discharge lamp and a discharge lamp device used as a headlamp for a vehicle such as an automobile.

  A discharge lamp used for an automotive headlamp is composed of a burner and a resin socket. The burner has a double tube structure including a light emitting portion that emits light during lighting, and is held by the socket so that the light emitting portion is located on the front end side of the socket.

  In such a lamp, in recent years, in order to make the lamp compact, there is a need to make the distance between the light emitting unit and the socket closer than before. When the distance between the light emitting portion and the socket is reduced, the heat source approaches and the temperature of the flange rises. Therefore, in order to improve heat resistance, a flange using metal has been developed.

  Here, this type of discharge lamp has a problem that noise is generated from the burner during lighting. It has been found that this noise is suppressed when the metal used for the flange is electrically connected to the ground, and the lamp, which is a device for mounting the lamp, is connected to the ground via the metal. However, it has been found that the startability of the lamp is worsened as a new problem.

JP 2003-297226 A JP 2007-323986 A International Publication No. 2009/130654 International Publication No. 2008/110969 International Publication No. 2009/130640

  The problem to be solved by the present invention is to provide a discharge lamp and a discharge lamp device that can suppress noise and have good startability.

To achieve the above object, a discharge lamp of embodiment, the inner tube, an outer tube provided to cover the light emitting portion, a burner and a flange capable of holding before Symbol burner having a light emitting portion The flange is held by a reflector, and the flange holds the burner so that the light emitting part is located on the front end side of the flange , and the flange has a metal part. wherein the metal portion includes a contact portion contactable with the reflector having conductivity, said burner mounting a conductive coating provided on the surface of the inner tube, along the outer surface of said outer tube The metal band is electrically connected to the metal part, and the outer tube is filled with argon or a mixed gas containing 20% or more of argon, and the metal band and The contact portion is electrically connected to ground, the said burner pressure pulse of positive polarity is supplied during startup.

It is a figure for demonstrating the discharge lamp of 1st Embodiment. It is sectional drawing for demonstrating the discharge lamp of 1st Embodiment. It is a figure for demonstrating the state which looked at the discharge lamp of 1st Embodiment from the front end side. It is a figure for demonstrating a metal part. It is a figure for demonstrating a base. It is a simplified diagram for explaining circuit connection of the discharge lamp of the first embodiment. It is a figure for demonstrating a base. It is a figure for demonstrating an example of a positive polarity high voltage | pressure pulse. It is a figure for demonstrating the noise and starting property at the time of applying a positive high voltage | pressure pulse to the lamp | ramp set to the presence or absence of ground connection while argon and nitrogen are enclosed in an outer tube | pipe. It is a figure for demonstrating the noise and starting property at the time of applying a positive high voltage pulse to the lamp | ramp set to the presence or absence of ground connection while air | atmosphere, neon, krypton, and xenon are enclosed in an outer tube | pipe. It is a figure for demonstrating the change of the dielectric breakdown voltage when the ratio of argon is changed in the mixed gas of argon and nitrogen. It is a figure for demonstrating the discharge lamp apparatus of 2nd Embodiment. It is sectional drawing for demonstrating the discharge lamp apparatus of 2nd Embodiment. It is a figure for demonstrating a reflector. It is a figure for demonstrating the state which looked at the discharge lamp apparatus of 2nd Embodiment from the front end side. It is a figure for demonstrating the 1st modification of a discharge lamp. It is a figure for demonstrating the 2nd modification of a discharge lamp.

(First embodiment)
The discharge lamp of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram for explaining the discharge lamp of the first embodiment, FIG. 2 is a cross-sectional view for explaining the discharge lamp of the first embodiment, and FIG. 3 is a discharge of the first embodiment. It is a figure for demonstrating the state which looked at the lamp | ramp from the front end side. In the present invention, for the sake of convenience, the direction of the arrow F shown in FIG. 2 that is forward when attached to the automobile will be referred to as the front end, and the direction of the arrow B will be referred to as the rear end.

  The discharge lamp shown in FIG. 1 is an HID lamp used in an automobile headlamp device, and includes a burner BN and a flange FL.

  The burner BN has a double-pipe structure, and an inner pipe 1 is disposed inside the burner BN. The inner tube 1 has an elongated shape, and a light emitting portion 11 that is a portion that emits light during lighting is formed near the center thereof. The light emitting part 11 is substantially elliptical, and a plate-like seal part 12 is formed at both ends thereof, and a cylindrical part 14 is continuously formed at both ends thereof via a boundary part 13. As described above, the inner tube 1 includes a portion that emits light and becomes high temperature during lighting. Therefore, the inner tube 1 is made of a material having translucency and heat resistance such as quartz glass.

A discharge space 111 having a substantially cylindrical shape at the center and a tapered shape at both ends is formed inside the light emitting unit 11. The volume of the discharge space 111, in the case of vehicle headlights ^are, 10mm ^{3 ~30mm 3,} further it is preferred that a 15 mm ³ 25 mm ^3. A discharge medium is enclosed in the discharge space 111. The discharge medium has a so-called mercury-free configuration that contains a metal halide and a rare gas and substantially does not contain mercury.

  The metal halide is composed of a halide such as sodium, scandium, zinc, or indium. Iodine is optimal as the halogen bonded to these metal halides, but bromine, chlorine, and the like may be combined. The combination of metal halides is not limited to this, and tin or cesium halides may be added.

  The rare gas is composed of xenon. The sealing pressure of the rare gas can be adjusted depending on the purpose. For example, in order to improve characteristics such as the total luminous flux, it is desirable that the sealing pressure is 10 atm or higher, particularly 13 atm or higher at normal temperature (25 ° C.). However, the upper limit is about 20 atm at present in production. In addition to xenon, neon, argon, krypton, or the like can be used as the rare gas, or a combination thereof can be used.

  The electrode mount 2 is sealed to the seal portion 12. The electrode mount 2 includes a metal foil 21, an electrode 22, a coil 23, and a lead wire 24.

  The metal foil 21 is a thin metal plate made of, for example, molybdenum, and is arranged so that its plate-like surface is parallel to the plate-like surface of the seal portion 12.

  The electrode 22 is, for example, an electrode made of so-called triated tungsten in which tungsten is doped with thorium oxide. One end of the metal foil 21 is overlapped and connected to the end of the light emitting unit 11 side, and the other end is disposed in the discharge space 111 so as to face each other with a predetermined distance between the electrodes. Yes. The distance between the electrodes is desirably 3.5 mm to 4.5 mm in terms of appearance in the case of an automotive headlamp.

  The coil 23 is a metal wire made of, for example, doped tungsten, and is wound spirally around the axis of the shaft portion of the electrode 22 sealed to the seal portion 12.

  The lead wire 24 is a metal wire made of molybdenum, for example. One end thereof is overlapped and connected to the metal foil 21 on the opposite side with respect to the light emitting portion 11, and the other end extends to the outside of the inner tube 1 along the tube axis. Among them, one end of an L-shaped support wire 25 made of nickel, for example, is connected to the lead wire 24 extending to the front end side of the lamp by laser welding. For example, a sleeve 3 made of ceramic is attached to the support wire 25 at a portion parallel to the tube axis.

  A cylindrical outer tube 4 is provided concentrically with the inner tube 1 on the outer side of the inner tube 1 configured as described above. These inner and outer pipes are connected by welding the outer pipe 4 near the cylindrical portion 14 of the inner pipe 1 and forming welded portions 41 at both ends. For this reason, an airtight space is formed between the inner tube 1 and the outer tube 4, and one or mixed gas selected from neon, argon, krypton, and xenon is enclosed in the space. ing. The gas pressure is preferably 0.3 atm or less, more preferably 0.1 atm or less. The outer tube 4 is preferably made of a material having a thermal expansion coefficient close to that of the inner tube 1 and having an ultraviolet blocking property, such as quartz glass to which an oxide such as titanium, cerium, or aluminum is added.

  A metal band 5 is provided on the rear end side of the burner BN composed of these. The metal band 5 is a metal plate made of stainless steel, for example, disposed along the outer peripheral surface of the outer tube 4, and is fixed to the outer tube 4 by welding both ends thereof.

  A flange FL is disposed near the metal band 5. The flange FL has a disk shape, and has a diameter of, for example, 31 mm and a thickness of 2.5 mm. The flange FL includes a resin portion 6 and a metal portion 7.

  The resin portion 6 is formed of a resin such as PPS or PEI, and is located on the periphery of the flange FL. The flange FL includes a notch 61 and a recess 62. The notches 61 are notches formed at the end of the resin portion 6 and are irregularly formed in three. The recesses 62 are provided on the front and rear end sides of the resin portion 6 and are formed at six intervals of 60 degrees.

  The metal part 7 is a metal plate made of stainless steel or the like, and is embedded in the resin part 6. The metal portion 7 before being embedded in the resin portion 6 has a shape as shown in FIG. 4, and includes a protruding piece portion 71, a sleeve holding portion 72, a hole portion 73, a notch portion 74, a bent portion 75, and a potch portion 76. I have. The projecting piece portions 71 are projecting pieces formed so as to project in the central direction of the metal portion 7, and are formed at four intervals of 90 degrees. In the state of the discharge lamp, the protruding piece 71 is bent obliquely toward the rear end of the furan FL, and holds the metal band 5 from four sides at the front end. The sleeve holding part 72 is a metal plate that protrudes in the center direction of the metal part 7, and a circular hole is formed in the center part. The sleeve 3 is inserted through the hole. The holes 73 are holes formed so that the positions thereof correspond to the recesses 62, and six holes are formed at intervals of 60 degrees. The notch 74 is a notch formed at the periphery of the metal part 7, and three are formed so as to correspond to the notch 61 of the resin part 6.

  The bent portions 75 are plates that are bent so as to protrude from the surface of the metal portion 7 to the front end side, and are formed at three intervals of 120 degrees. The potch portion 76 is a protrusion protruding in the front end direction provided as a contact portion exposed on the surface of the flange, and is formed in each bent portion 75. This potch portion 76 is a portion that becomes a base point when measuring dimensions. For example, as shown in FIG. 2, a distance D1 from the tip of the potch portion 76 to the center between the electrodes in the light emitting portion 11 is defined as LCL (Light Center Length) of the discharge lamp. D1 of this embodiment is set to 20 mm or less, for example, 18.0 mm. Since D1 of the conventional discharge lamp is 27.1 mm, D1 is shortened by 7 mm or more.

  A base 8 is disposed on the rear end side of the flange FL. The base 8 is made of a conductive material such as stainless steel, iron, nickel, or aluminum, for example, and includes a case portion 81 and a ring 82 as shown in FIG. The ring 82 is a cylindrical tube formed on the front end side of the case portion 81, and six protrusions 821 are formed on the front end side at intervals of 60 degrees. This protrusion 821 is used to connect the ring 82 and the flange FL. For example, the ring 82 and the flange FL can be fixed by inserting the protrusion 821 into the hole 73 of the metal portion 7 and then bending the protruding portion so as to be accommodated in the recess 62. It is even better to strengthen the fixing by performing laser welding or the like on the overlapping portion of the bent protrusion 821 and the metal portion 7.

  Inside the base 8, as shown in FIG. 6, a resin case RC is disposed as an insulating casing. A lighting circuit LC is further arranged inside the resin case RC. The lighting circuit LC is a circuit for starting and stably lighting a discharge lamp composed of circuit elements such as a transformer and a capacitor, and includes a starting lighting circuit IG and a stable lighting circuit BL. The start lighting circuit IG is a circuit called an igniter, and starts discharge by supplying a high pressure pulse of 10 kV or more to the discharge lamp at the start. In the present embodiment, the start lighting circuit IG generates a positive high voltage pulse at the start. The “positive high-voltage pulse” is a pulse generated on the positive side immediately after application as shown in FIG. The sign of the pulse can be changed depending on the winding direction of the transformer. The stable lighting circuit BL is a circuit called a ballast, and maintains lighting by supplying rated power to the discharge lamp during stable lighting. The stable lighting circuit BL is controlled to be about 25 W when stable and about 55 W, which is twice or more as much as stable power immediately after starting.

  An example of the electrical connection of these circuits will be described. The input side of the starting lighting circuit IG is connected to a DC power source DS such as a battery, and the output side is connected to the input side of the stable lighting circuit BL. At that time, the negative side of the DC power source DS is also connected to the base 8. That is, the base 8 is grounded (grounded). Since the base 8 is electrically connected to the metal part 7, the potch part 76 is also grounded. Furthermore, since the metal part 7 is electrically connected to the metal band 5 via the protruding piece part 71, the metal band 5 is also grounded. The output side of the stable lighting circuit BL is connected to the lead wire 24 and the support wire 25.

  Here, a lamp (lamp 1) in which argon is sealed inside the outer tube and the potch portion and the metal band are connected to ground and a lamp (lamp 2) that is not connected to ground are mounted on the reflector, and the positive electrode shown in FIG. A test was started by applying a high-pressure pulse of the property. In addition, a lamp (lamp 3) in which nitrogen is sealed inside the outer tube and the potch part and metal band are connected to ground and a lamp (lamp 4) that is not connected to ground are mounted on the reflector, and the same positive polarity high pressure A test was started by applying a pulse. The result is shown in FIG.

  From the results, it can be seen that the lamp 1 does not generate noise and has good startability, whereas the lamp 2 has good startability but generates noise. Although the lamp 3 does not generate noise, the starting voltage is significantly higher than that of the lamp 4 and the starting performance is deteriorated. On the other hand, the lamp 4 has good starting performance but noise is generated. That is, only the lamp 1 has good startability while suppressing the generation of noise.

  In the lamp 1 and the lamp 3, the noise is suppressed by connecting the potch portion to the ground so that the reflector that contacts the ground is also connected to the ground, and the noise generated from the burner during lighting is reduced by the reflector. Because. The reason why the startability was good in the lamp 1, the lamp 2 and the lamp 4 is considered to be that a wide range of dielectric barrier discharge occurred in the outer tube at the start. On the contrary, the startability of the lamp 3 is deteriorated because the metal band is connected to the ground, so that the dielectric barrier discharge generated in the outer tube at the start is generated toward the metal band, and the dielectric barrier discharge is caused. This is probably because the auxiliary electrode effect was weakened. As a result, the breakdown voltage of the lamp 3 was higher than that of the lamp 4 by about 2 kV. It should be noted that the startability of the lamp 1 was good despite the metal band being connected to the ground in the same manner as the lamp 3. The breakdown voltage of the lamp 1 was about 0.2 kV higher than that of the lamp 2. The reason for this is not clear, but when argon is sealed in the outer tube, it can be said that startability is hardly affected even if the metal band is grounded.

  Next, a similar test was performed on a lamp enclosing air, neon, krypton, and xenon. The result is shown in FIG. As can be seen from the results, the results were the same as those obtained when argon was sealed in FIG. 8 except for the lamp 6 filled with the atmosphere in which dielectric barrier discharge was difficult to occur at the start. However, in the lamps 7, 9, and 11 enclosing neon, krypton, and xenon, the insulation start voltage is increased by about 1.0 kV compared to the lamps 8, 10, and 12 in which the metal band is not connected to the ground. did. Therefore, argon has resulted in being particularly effective.

  Next, a similar test was performed on a mixed gas of argon and nitrogen. The result is shown in FIG. FIG. 10 is a diagram for explaining a change in dielectric breakdown voltage when the argon ratio is changed in a mixed gas of argon and nitrogen. The ratio is a partial pressure ratio (molar ratio).

  As can be seen from the results, the higher the argon ratio, the smaller the increase in dielectric breakdown voltage, that is, the startability is better. However, since the breakdown voltage tends to be high when the argon ratio is lower than 20%, the argon ratio is desirably 20% or more. Furthermore, the argon ratio is desirably 80% or more that can suppress the increase of the dielectric breakdown voltage to 0.5 kV or less. Similar results are obtained with a mixed gas such as krypton or xenon.

  In this embodiment, since the potch 76 of the metal part 7 is connected to the ground, the potch 76 comes into contact with the metal reflector when the lamp is mounted on the lamp, and the reflector is connected to the ground. Can be suppressed. In addition, argon gas containing mainly 20% or more, preferably 80% or more of argon is enclosed in the outer tube 4, so that the metal band 5 is grounded and the burner BN is started. Even if a positive high-pressure pulse is sometimes applied, the startability can be improved. That is, it is possible to maintain good startability while adopting a simplified structure in which the metal band 5 is held by the protruding piece portion 71 integrally formed with the metal portion 7.

  Further, when the flange FL is composed of the resin part 6 and the metal part 7, the resin part 6 is formed on the edge of the flange FL, and the metal part 7 is embedded in the resin part 6, when mounted on the reflector, Only the metal part 7 is exposed to the reflector, and the resin part 6 is hardly irradiated with ultraviolet rays from the light-emitting part 11. Therefore, the phenomenon that the lens is fogged due to deterioration of the resin part 6 is suppressed. it can. Further, since the peripheral edge is made of resin, it is possible to realize a flange FL that is easy to manufacture and has high dimensional accuracy and strength.

(Second Embodiment)
FIG. 11 is a diagram for explaining the discharge lamp device of the second embodiment, and FIG. 12 is a cross-sectional view for explaining the discharge lamp device of the second embodiment. About each part of this 2nd Embodiment, the same part as each part of the discharge lamp apparatus of 1st Embodiment is shown with the same code | symbol, and the description is abbreviate | omitted.

  The discharge lamp device includes a reflector 91, a lens structure 92, and a discharge lamp DL.

  The reflector 91 is made of a conductive material such as stainless steel and includes a neck portion 911 and a reflecting portion 912 as shown in FIG. The internal shape of the neck portion 911 is stepped, that is, a space 913 whose shape changes is formed inside the neck portion 911. Further, a contact surface 914 is formed at a step portion located on the rear end side of the neck portion 911. Further, three locking pieces 915 are formed inside the neck portion 911 on the rear end side with respect to the contact surface 914. The reflection portion 912 is formed continuously with the front end side of the neck portion 911, and a space 916 is formed therein so as to communicate with the space 913.

  The lens structure 92 includes a lens 921 and a lens holding portion 922, and is disposed in the opening portion of the reflector 91. The lens 921 is a lens that allows light emitted from the opening of the reflector 91 to enter the light incident surface 923 and exit from the light exit surface 924. The shape of the lens 92 can be variously changed according to a desired light distribution.

  The discharge lamp DL is the lamp described in the first embodiment, and is connected to the reflector 91 so that the burner BN, in particular, the light emitting unit 11 is disposed in the space 913.

  The connection between the discharge lamp DL and the reflector 91 will be described with reference to FIG. 14. First, as shown in FIG. 14A, while the three locking pieces 915 and the three notches 74 of the flange FL are matched, the resin The discharge lamp DL is moved until the three potty portions 76 of the portion 6 come into contact with the contact surface 914 of the neck portion 911. Next, the discharge lamp DL is rotated around the tube axis by α degrees (for example, 20 degrees) so that the position of the sleeve 3 is downward in the drawing. Then, as shown in (b), the resin portion 6 of the flange FL is sandwiched between the contact surface 914 and the three locking pieces 915, and the mounting of the discharge lamp DL on the reflector 91 is completed.

  In this state, since the potch portion 76 is in contact with the contact surface 914 of the neck portion 911, the reflector 91 is also grounded by the potch portion 76 that is grounded. When the reflector 91 is connected to the ground, a high-pressure pulse is applied to the discharge lamp at the start, and even if noise is generated from the burner BN, the noise is reduced by the reflector. Since the outer tube 4 is filled with argon, even if a positive high-voltage pulse is applied to the lamp at the time of starting, an increase in the discharge starting voltage is suppressed, and the startability can be kept good.

  As can be seen from FIG. 14B, when the discharge lamp DL is viewed from the opening of the reflector 91, only the metal portion 7 can be confirmed among the parts of the flange FL. That is, the resin part 6 is hardly exposed in the space 914 whose diameter is R (for example, 26 mm). Therefore, in this state, even when the discharge lamp DL is turned on, the ultraviolet rays emitted from the light emitting part 11 are hardly irradiated to the resin part 6, so that gas or the like is generated due to deterioration of the resin part 6, and the light incident surface of the lens 921 Problems such as clouding of 923 can be suppressed. In addition, when the lamp with the molding width of the resin portion 6 changed is similarly held by the reflector and turned on, the lens 921 may be whitened even if the resin portion 6 is exposed to the space 914. There wasn't. From this, it can be said that the present invention should not be construed as being limited to the state in which the resin portion 6 is not exposed in the space 914.

  Since the resin portion 6 can be formed by resin molding and has excellent dimensional accuracy, the resin portion 6 cannot be dimensionally fitted between the contact surface 914 and the locking piece 915, or a gap is generated and is not retained. There will never be enough. Moreover, since the resin part 6 is excellent in strength, the flange FL will not be deformed even if the rotating operation and the attaching / detaching operation are repeated.

  Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  For example, the discharge lamp can be applied to a lamp integrated with a lighting start circuit as shown in FIG. 15, and a lamp where the lighting start circuit and the stable start circuit are not integrated as shown in FIG.

  A conductive film may be provided on the surface of the inner tube 1. By forming a conductive film, startability can be further improved. In particular, it is desirable to provide a conductive film on the surface of the sealing portion 12 to which the metal foil 21 is sealed. As the conductive film, tin oxide, indium oxide, zinc oxide, ITO which is an oxide of indium and tin, or the like can be used.

  As shown in FIG. 15, the flange FL may have a form in which a metal cover is provided as the metal portion 7 on the front end side of the resin portion 6. Moreover, you may make it comprise only the metal part 7 without using the resin part 6. FIG.

  As shown in FIG. 16, the burner BN may be held by a projecting piece 71 protruding to the front end side of the flange FL. Further, as shown in FIG. 15, the protruding piece 51 may be formed on the metal band 5 and the protruding piece 51 and the metal portion 7 may be welded.

  The ground connection of the reflector may be performed by a method other than via the potch portion 76. That is, the contact portion is not limited to the potch portion 76. For example, a metal piece integrally formed with the metal portion 7 may be provided so as to be exposed on the rear end surface of the flange FL, and the metal piece may come into contact with the locking piece 915 when attached to the reflector. Further, a metal piece integrally formed with the metal portion 7 may be provided so as to be exposed on the surface of the side wall of the flange FL, and the metal piece may come into contact with the inner side surface of the neck portion 911 when attached to the reflector. Further, the base 8 and the reflector may be brought into direct contact, or a metal part may be provided on the base 8 and the metal part may be brought into contact with the reflector. In short, any structure may be used as long as the reflector is grounded by using any metal part of the discharge lamp that is grounded. Further, the ground connection of the base 8 may be performed by connecting a cable having a shield mesh to the connector 83.

BN burner 1 Inner tube 11 Light emitting portion 4 Outer tube 5 Metal band FL Flange 6 Resin portion 7 Metal portion 76 Potch portion

Claims (3)

Comprising an inner tube having a light emitting portion, an outer tube provided to cover the light emitting portion, a burner and a flange that can hold the previous SL burner, a discharge lamp in which the flange is held in the reflector Because
The flange holds the burner so that the light emitting part is located on the front end side of the flange,
The flange includes a metal portion, and the metal portion includes a contact portion that can contact the reflector having conductivity ,
The burner includes a conductive coating provided on the surface of the inner tube and a metal band mounted along the outer surface of the outer tube , and the metal band is electrically connected to the metal part. ,
The outer tube is filled with argon or a mixed gas containing 20% or more of argon,
The metal band and the contact portion are electrically connected to ground,
A discharge lamp characterized in that a positive high-pressure pulse is supplied to the burner at the time of starting. Inner tube having a light emitting portion, an outer tube provided to cover the light emitting portion, a burner and a flange that can hold the previous SL burners, and the base of possible conductive holding said flange, said base A discharge lamp having a lighting circuit provided therein, wherein the flange is held by a reflector,
The flange holds the burner so that the light emitting part is located on the front end side of the flange,
The flange includes a metal portion;
The metal part or the base includes a contact part capable of contacting the reflector having conductivity ,
The burner includes a conductive coating provided on the surface of the inner tube and a metal band mounted along the outer surface of the outer tube , and the metal band is electrically connected to the metal part. ,
The outer tube is filled with argon or a mixed gas containing 20% or more of argon,
The metal band and the contact portion are connected to the lighting circuit through the base so as to be electrically grounded,
The discharge lamp is characterized in that the lighting circuit supplies a positive high-pressure pulse to the burner at the time of starting. Inner tube having a light emitting portion, an outer tube provided to cover the light emitting portion, a burner and a discharge lamp and a flange that can hold the previous SL burner,
A neck portion having a contact surface in contact with the flange on the rear end side, a reflection portion formed so as to be continuous with the front end side of the neck portion, and formed so as to communicate with the inside of the neck portion and the reflection portion a discharge lamp device comprising a re Furekuta, a with a space, a,
The flange holds the burner so that the light emitting part is located on the front end side of the flange,
Said flange comprises a metal portion, the metal portion includes a contact portion in contact with the contact surface, the flange is such that the contact portion is in contact with the neck portion, it is held in the reflector having conductivity,
The burner includes a conductive coating provided on the surface of the inner tube and a metal band mounted along the outer surface of the outer tube , and the metal band is electrically connected to the metal part. ,
The outer tube is filled with argon or a mixed gas containing 20% or more of argon,
The metal band and the reflector are electrically connected to the ground through the metal part,
A discharge lamp device, wherein a positive high-pressure pulse is supplied to the burner at the time of starting.

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