CN104813437A - Discharge lamp and lighting tool for vehicle - Google Patents

Discharge lamp and lighting tool for vehicle Download PDF

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Publication number
CN104813437A
CN104813437A CN201380061281.5A CN201380061281A CN104813437A CN 104813437 A CN104813437 A CN 104813437A CN 201380061281 A CN201380061281 A CN 201380061281A CN 104813437 A CN104813437 A CN 104813437A
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CN
China
Prior art keywords
discharge lamp
indium
discharge space
discharge
electrode
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Granted
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CN201380061281.5A
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Chinese (zh)
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CN104813437B (en
Inventor
出口诚
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Toshiba Lighting and Technology Corp
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Toshiba Lighting and Technology Corp
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Publication of CN104813437A publication Critical patent/CN104813437A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/88—Lamps with discharge constricted by high pressure with discharge additionally constricted by envelope
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • F21S41/172—High-intensity discharge light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/125—Selection of substances for gas fillings; Specified operating pressure or temperature having an halogenide as principal component
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/30—Vessels; Containers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Discharge Lamp (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

The purpose of the present invention is to provide a discharge lamp and a lighting tool for a vehicle capable of controlling the boost of tube voltage during product life. The discharge lamp (100) according to an embodiment comprises: a light emitting part (11) having a discharge space (111) inside in which a metal halide (2) including an indium halide is sealed; and a pair of electrodes (32) which projects inside the discharge space (111), the electrodes arranged opposite each other at a prescribed distance. The ratio of indium halide contained in the metal halide (2) is 0.1 wt% - 0.33 wt%. Further, a dimension (d) that is the longest part of the discharge space (111) in the direction orthogonal to the direction in which the pair of electrodes (32) extends in the discharge space (111) is 1.5 mm - 2.3 mm.

Description

Discharge lamp and lamps apparatus for vehicle
Technical field
Embodiments of the present invention relate to a kind of discharge lamp and lamps apparatus for vehicle.
Background technology
In recent years, consider environment, make every effort to the low-power of discharge lamp.But if the low-power of being arranged to, then electric current diminishes, interelectrode electric discharge thus may be caused to become unstable.Further, if the temperature of the illuminating part of discharge lamp rises because of lighting, then tube voltage (interelectrode voltage) can rise, and causes electric current to reduce further, may produce flicker, the phenomenon of even turning off the light.
Conventional art document
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2004-172056 publication
Summary of the invention
The problem that invention will solve
Problem to be solved by this invention be to provide a kind of can at the discharge lamp of the rising of the life period killer tube voltage of product and lamps apparatus for vehicle.
For solving the means of problem
Discharging lamps and lanterns involved by execution mode is standby: illuminating part, has discharge space in inside, and is sealed with the halid metal halide comprising indium at this discharge space; Pair of electrodes, the inside to described discharge space is outstanding and be configured to across preset distance opposed.Further, the halid ratio being contained in the indium of described metal halide is more than 0.1wt% and below 0.33wt%.Further, on the direction orthogonal with the bearing of trend of described pair of electrodes of described discharge space, the size d that the most long portion of described discharge space is divided is more than 1.5mm and below 2.3mm.
Invention effect
According to the embodiment of the present invention, provide a kind of can at the discharge lamp of the rising of the life period killer tube voltage of product and lamps apparatus for vehicle.
Embodiment
The Discharging lamps and lanterns of the first invention is standby: illuminating part, has discharge space in inside, and is sealed with the halid metal halide comprising indium at this discharge space; Pair of electrodes, inside to described discharge space is outstanding and be configured to across predetermined distance opposed, the halid ratio being contained in the indium of described metal halide is more than 0.1wt% and below 0.33wt%, on the direction orthogonal with the bearing of trend of described pair of electrodes of described discharge space, the size d of the longest part of described discharge space is more than 1.5mm and below 2.3mm.
According to this discharge lamp, can in the rising of the life period killer tube voltage of product.
The discharge lamp of the second invention also possesses sealing, and sealing portion is arranged at the both ends on the bearing of trend of the described pair of electrodes of described illuminating part respectively, and, between described sealing and described electrode, be provided with gap.
According to this discharge lamp, can the rising of killer tube voltage more effectively at the life period of product.
In the discharge lamp of the 3rd invention, by carrying out lighting and the light-off of described discharge lamp, the halide of indium is made to lodge in described gap.
According to this discharge lamp, can the rising of killer tube voltage more effectively at the life period of product.
The lamps apparatus for vehicle of the 4th invention possesses: above-mentioned discharge lamp; Lamp circuit, is electrically connected on described discharge lamp.
According to this lamps apparatus for vehicle, can in the rising of the life period killer tube voltage of product.
In the lamps apparatus for vehicle of the 5th invention, the mode becoming level with the pair of electrodes being arranged at described discharge lamp installs described discharge lamp.
According to this lamps apparatus for vehicle, horizontal lighting can be carried out.
Hereinafter, with reference to the accompanying drawings of execution mode.In addition, in the drawings and in which, to identical constitutive requirements mark same-sign also suitable detailed.
Discharge lamp involved by embodiments of the present invention such as can as HID (High Intensity Discharge, the high intensity discharge) lamp being used in car headlamp.In addition, at discharge lamp of the present invention as when being used in the HID lamp of headlamp of automobile, so-called horizontal lighting can be carried out.
The purposes of the discharge lamp involved by embodiments of the present invention is not defined in car headlamp, and in this as an example, is that the situation of the HID lamp being used in car headlamp is described as an example with discharge lamp.
(the first execution mode)
Fig. 1 is the schematic diagram for illustrating the discharge lamp 100 involved by the first execution mode.
In addition, in Fig. 1, its rightabout, to being set to front, is set to rear end side, upper direction is set to upper end side, lower direction is set to lower end side by front when discharge lamp 100 being installed on automobile.
As shown in Figure 1, in discharge lamp 100, pipe cap 101 and base 102 is provided with.
Pipe cap 101 is provided with interior pipe 1, outer tube 5, illuminating part 11, sealing 12, electrode suppor 3, Support Level 35, sleeve pipe 4, metal tape 71.
Interior pipe 1 cylindrically, and is made up of the material with light transmission and thermal endurance.Interior pipe 1 is such as made up of quartz glass etc.
Outer tube 5 is arranged at the outside of interior pipe 1 and is arranged to and the same core of interior pipe 1.That is, double-sleeve structure is become.
The connection of outer tube 5 and interior pipe 1 can by carrying out outer tube 5 deposition near the cylindrical portion 14 of interior pipe 1.Be formed in the enclosure space between interior pipe 1 and outer tube 5 and be sealed with gas.The gas be enclosed is can the gas of dielectric barrier discharge, such as, can be a kind of gas being selected from neon, argon gas, xenon, nitrogen, or can be the mist of these gases.The inclosure pressure of gas is such as below 0.3atm under normal temperature (25 DEG C), is particularly preferably below 0.1atm.
Outer tube 5 is preferably had the material that ultraviolet blocks performance by thermal coefficient of expansion make close to the thermal coefficient of expansion of interior pipe 1 material.Outer tube 5 can be made up of the quartz glass of the oxide being added with such as titanium, cerium, aluminium etc.
Illuminating part 11 is arranged near the central authorities of interior pipe 1, and section shape ovalize.The inside of illuminating part 11 is provided with discharge space 111, and the middle body of this discharge space 111 is roughly in cylindric, and two ends are shrunk to taper.
The size d (the size d that the most long portion hereinafter referred to as the internal diameter of illuminating part 11 is divided) that the most long portion of the discharge space 111 on the direction orthogonal with the bearing of trend of pair of electrodes 32 of discharge space 111 is divided is preferably more than 1.5mm and below 2.3mm.The size d that divides of the most long portion of the internal diameter of illuminating part 11 such as middle body inwall 11a between size (being diameter dimension when middle body is cylindric).
In addition, the size d that the most long portion describing the internal diameter of illuminating part 11 later in detail is divided.
Discharge medium is sealed with in discharge space 111.Discharge medium comprises metal halide 2 and inert gas.
That is, illuminating part 11 has discharge space 111 in inside, is sealed with the halid metal halide 2 comprising indium at this discharge space 111.
Metal halide 2 comprises: the halide of indium, the halide of sodium, the halide of scandium, the halide of zinc.As halogen, such as, iodine can be used.But, also can use bromine or chlorine etc. to replace iodine.
The halid ratio (the halid weight ÷ of indium comprises weight × 100 of the halid metal halide 2 of indium) being contained in the indium of metal halide 2 can be set to more than 0.1wt% and below 0.33wt%.
Now, the halid ratio being contained in the indium of metal halide 2 is the ratio under initial condition (such as, untapped discharge lamp 100).As aftermentioned, by repeatedly lighting and extinguishing discharge lamp 100, the halid ratio being contained in the indium of metal halide 2 can decline gradually.
In addition, the detailed content of halid ratio about the indium being contained in metal halide 2 will describe later.
The inert gas enclosed in discharge space 111 can be such as xenon.The inclosure pressure of inert gas can adjust according to object.Such as, in order to make full luminous flux increase, preferably under normal temperature (25 DEG C), inclosure pressure is set to more than 10atm and below 20atm.Further, except xenon, neon, argon gas, Krypton etc. can also be used, or use the mist after these combination of gases.
Sealing 12, in tabular, is arranged at the two ends of illuminating part 11.That is, sealing 12 is in tabular, is arranged at the both ends on the bearing of trend of the pair of electrodes 32 of illuminating part 11 respectively.
Sealing 12 such as can be made by press seal method.In addition, sealing 12 also can be made by collapsed seal method and be cylindric.
A sealing 12 with the end of illuminating part 11 side opposite side, be formed with cylindrical portion 14 continuously via boundary portion 13.
Electrode suppor 3 is arranged at the inside of sealing 12.
Electrode suppor 3 is provided with: metal forming 31, electrode 32, coil 33, wire 34.
Metal forming 31 in lamellar, such as, is made up of molybdenum.
Electrode 32 in cylindric, such as, is made up of so-called thoriated tungsten thorium oxide being coated in tungsten.In addition, the material of electrode 32 also can be pure tungsten, Doped Tungsten, rhenium tungsten etc.
One end of electrode 32 is welded in illuminating part 11 side end of metal forming 31.The other end of electrode 32 is outstanding in discharge space 111.The front end of electrode 32 keeps predetermined distance and arranged opposite each other.
That is, pair of electrodes 32 is outstanding to the inside of discharge space 111, and arranged opposite across predetermined distance.
The front end distance each other of electrode 32 is such as more than 3.4mm and below 4.4mm.
Further, with regard to the shape of electrode 32, and not necessarily to be diameter constant cylindric on tube axial direction.Such as, the shape of electrode 32 also can be the non-cylindrical that the diameter of leading section is greater than the diameter of base end part, the shape of also can be front end be spheroid, also can be the diameter of an electrode as dc point lamp type the shape different from another electrode diameter.
Coil 33 is such as that the metal wire be made up of Doped Tungsten is formed.Coil 33 is wound in the outside of the electrode 32 of the inside being arranged at sealing 12.Now, such as, the wire diameter of coil 33 can be set to 30 μm ~ about 100 μm, and coil-span can be set to less than 600% of coil 33 wire diameter.
In addition, the action effect of coil 33 is described later in detail.
Wire 34 can be such as the metal wire be made up of molybdenum.One end of wire 34 be equipped on metal forming 31 with the end of illuminating part 11 side opposite side.The other end of wire 34 extends to the outside of interior pipe 1.
Support Level 35, in L-shaped, is connected to the end of the wire 34 of drawing from the front of discharge lamp 100.The connection of Support Level 35 and wire 34 can be fetched by Laser Welding to be carried out.Support Level 35 such as can be made up of nickel.
The part extended in parallel with interior pipe 1 that sleeve pipe 4 covers Support Level 35.Sleeve pipe 4 such as can cylindrically and be made up of pottery.
Metal tape 71 is fixed on the outer peripheral face of outer tube 5 rear end side.
Base 102 is provided with: main part 6, installation accessory 72, bottom terminals 81, sidepiece terminal 82.
Main part 6 is made up of Ins. ulative material such as resins.Be provided with in the inside of main part 6: the rear end side of wire 34, Support Level 35, sleeve pipe 4.
Installation accessory 72 is arranged at the end, front of main part 6.Installation accessory 72 is given prominence to from main part 6, keeps metal tape 71.Keep metal tape 71 by installation accessory 72, thus make pipe cap 101 be held in base 102.
Bottom terminals 81 is arranged at the inside of the rearward end side of main part 6.Bottom terminals 81 is made up of conductive material, and is electrically connected with wire 34.
Sidepiece terminal 82 is arranged at the sidewall of the rearward end side of main part 6.Sidepiece terminal 82 is made up of conductive material, and is electrically connected with Support Level 35.
Further, bottom terminals 81 is connected with lamp circuit 205 (with reference to Fig. 7) as low-pressure side as high-pressure side, sidepiece terminal 82.When this discharge lamp is car headlamp, this discharge lamp 100 is mounted to the approximate horizontal state of its central shaft, and Support Level 35 is positioned at roughly lower end side (below).Further, horizontal lighting is called by lighting the discharge lamp 100 being mounted to this direction.
At this, if light discharge lamp 100, the temperature of illuminating part 11 rises.If the temperature of illuminating part 11 rises, the evaporation capacity of metal halide 2 increases.Now, the halide evaporation of the halide of sodium, the halide of scandium and zinc, thus tube voltage is increased.
If the halid amount of evaporation in discharge space 111 increases, then luminous quantity can increase while the temperature of illuminating part 11 can rise further.If the temperature of illuminating part 11 rises further, then the halid amount of evaporation in discharge space 111 can increase further.Further, if the halid amount of evaporation increases in discharge space 111, then tube voltage can rise.Further, illuminating part 11 can be made with halide generation chemical reaction due to long-term lighting thus reduce transmitance, thus the temperature of illuminating part 11 can rise.That is, if light discharge lamp 100, then along with the process of time, tube voltage becomes easy rising.
Electric power constant when the discharge lamp 100 being used in car headlamp etc. is controlled to normal operation by ballast circuit described later etc.Therefore, if tube voltage rises, then the electric current guiding discharge that can diminish is suppressed, and lamp therefore likely can be made to extinguish.
In such cases, be contained in the halid ratio of the indium of metal halide 2 as long as reduce, just can the rising of killer tube voltage.But if only reduce the halid ratio being contained in the indium of metal halide 2, then when lighting starts, the halid quantitative change of the indium of evaporation is few, causes tube voltage step-down, ER effect likely can be made too much.
In addition, if the service time of discharge lamp 100 is elongated, then illuminating part 11 meeting melanism or gonorrhoea (devitrification) gradually.If melanism or gonorrhoea phenomenon appear in illuminating part 11, then the light that should emit to illuminating part 11 outside is blocked, and therefore in illuminating part 11, produces heat.Therefore, if the service time of discharge lamp 100 is elongated, then the temperature of illuminating part 11 easily rises, and from lighting starts, tube voltage easily uprises.
As mentioned above, in discharge lamp 100, tube voltage becomes because of various reasons and is easy to rise.Further, preferably when discharge lamp 100 starts to light, tube voltage is located in preset range (such as, more than 40V).
That is, preferably in the rising of the life period killer tube voltage of discharge lamp 100 product, and make tube voltage in predetermined scope when lighting starts.
Therefore, in discharge lamp 100, the halid ratio being contained in the indium of metal halide 2 is set to more than 0.1wt% and below 0.33wt%, the size d that the most long portion of the internal diameter of illuminating part 11 is divided is set to more than 1.5mm and below 2.3mm.
Further, between electrode 32 and sealing 12, the gap be communicated with discharge space 111 is set.
Fig. 2 is the chart for illustrating the relation between the halid ratio of indium and the change of tube voltage.
Fig. 2 be lighting can be carried out under the identical condition of the lifetime testing conditions (i.e. EU120 merotype) of car headlamp discharge lamp of defined with Japan electricity ball industry, the result tested of turning off the light.
Lighting, test of turning off the light are carried out under the following conditions.
In illuminating part 11, the size d that the most long portion of internal diameter is divided is 2.2mm, and outside dimension is 5.2mm, and the length of the length direction of illuminating part 11 is 7.8mm.
Electrode 32 is in cylindric, and diameter dimension is 0.28mm, and length dimension is 7.5mm.Further, the length that electrode 32 is outstanding in discharge space 111 is 2.2mm.Outer tube 5 is made up of uv-resistant quartz glass.Be sealed with inert gas (i.e. argon (Ar)) being formed in the enclosure space between interior pipe 1 and outer tube 5, the inclosure pressure of inert gas is set to 0.1atm under normal temperature (25 DEG C).
The amount comprising the halid metal halide 2 of indium is set to 0.2mg.In addition, halide is iodide.
The halid ratio being contained in the indium of metal halide 2 is set to 0.05wt%, 0.10wt%, 0.15wt% respectively.
In addition, the A in Fig. 2 is 0.05wt%, B be 0.10wt%, C is 0.15wt%.Further, use stabilizer (electrical ballast, electric ballast) to control, to make to become 60W when lighting starts, become 25W when stable lighting.
And.Carry out lighting, light-off with the lighting of EU120 merotype, light-off cycle, and measure the change of tube voltage.
As shown in Figure 2, if the halid ratio being contained in the indium of metal halide 2 is set to more than 0.1wt%, then can the rising of killer tube voltage.
At this, although if clearly cannot be contained in the halid rate of change of the indium of metal halide 2, the reason of tube voltage change, such as, can be inferred as follows.First, if discharge lamp 100 is lighted, then in discharge space 111, produce plasma.Now, plasma is partial to the upper end side of discharge space 111 because of convection current.Therefore, the temperature of the upper end side of illuminating part 11 is higher than the temperature of the lower end side of illuminating part 11.Further, near plasma and the temperature of the electrode 32 be made up of the material that conductive coefficient the is higher temperature higher than illuminating part 11.
Then, if extinguish discharge lamp 100, then temperature declines, and the halide being thus present in the indium evaporated in discharge space 111 condenses and lodges in the lower end side of discharge space 111.
At this, according to the opinion of the present inventor, electrode 32 is different with the speed that the temperature of the lower end side of the discharge space 111 that the halide of the indium of condensation accumulates declines.That is, the temperature decrease speed of the electrode 32 be made up of the material that conductive coefficient is higher is faster than the temperature decrease speed of the lower end side of discharge space 111.
Fig. 3 is the chart for illustrating temperature decline situation.
S1 in Fig. 3 represents that the temperature of electrode 32 declines, and S2 ~ S4 represents that the temperature of the lower end side of the discharge space 111 that the halide of the indium of condensation accumulates declines.
In addition, S2 and S3 is the temperature curve on the downside of discharge space 111 when being turned off the light by the discharge lamp 100 of life period.S4 is the temperature curve on the downside of the discharge space 111 of beginning of lifetime.If rise in the temperature of life period illuminating part 11, then temperature T when S1 and S2 intersects is lower than the temperature of the halide condensation of the indium of evaporation.
If produce temperature to decline thus the temperature becoming the halide condensation lower than the indium of evaporation because of the extinguishing of discharge lamp 100, then start condensation.Now, preferentially condensation is produced in temperature lower.
As shown in Figure 3, when S2 and S3, along with the process of time, the temperature of S1 becomes the temperature lower than S2 and S3.Therefore, when S2 and S3, preferentially produce condensation at electrode 32.
On the other hand, when S4, because the temperature of S4 is all the time lower than the temperature of S1, therefore preferentially produce condensation in the lower end side of discharge space 111.
At this, if preferentially produce condensation at electrode 32, then the halide of the indium condensed invades the gap between electrode 32 and sealing 12.Further, when lighting afterwards, invade the indium in the gap between electrode 32 and sealing 12 halid again evaporate suppressed.
In addition, the phenomenon that the halide of indium invades the gap between electrode 32 and sealing 12 can be confirmed by naked eyes.
That is, during repeatedly carrying out lighting and light-off, the halide due to indium lodges in the gap between electrode 32 and sealing 12 gradually, and the halid amount of the indium thus comprised in metal halide 2 tails off gradually.
Further, if the halid quantitative change of indium is few, then the halid amount being present in the indium of the evaporation in discharge space 111 when lighting can tail off.
Therefore, as shown in B, the C in Fig. 2, the rising of tube voltage is inhibited.In addition, compared with B, because the halid enclosed volume of the indium in C is more, the halide of the indium thus making tube voltage increase is more, and suffered impact is more remarkable.
In addition, if the enclosed volume of indium is less, then the halide amount of the indium making tube voltage increase is less, thus as shown in the A in Fig. 2, and cannot the rising of killer tube voltage.
As mentioned above, if the halid ratio being contained in the indium of metal halide 2 is set to more than 0.1wt%, then can the rising of killer tube voltage.But if improve the halid ratio being contained in the indium of metal halide 2, then the impact caused in the intrusion of life period indium is excessive, thus produces the problem of luminous flux decline.
Fig. 4 is the chart for illustrating the relation between the halid ratio of indium and the decline of luminous flux.
As shown in Figure 4, if the halid ratio being contained in the indium of metal halide 2 is set to 0.50wt%, then the decline of luminous flux can become excessive.
Therefore, preferably the halid ratio being contained in the indium of metal halide 2 is set to more than 0.1wt% and below 0.33wt%.
Further, if the size d that the most long portion of the internal diameter of illuminating part 11 is divided changes, then the temperature decline of the lower end side of discharge space 111 can change.
Fig. 5 is the chart for illustrating temperature decline situation.
S1 in Fig. 5 represents that the temperature of electrode 32 declines, and S5, S6 represent that the temperature of the lower end side of the discharge space 111 that the halide of the indium of condensation accumulates declines.
In addition, the size d in S5 is less than the size d in S6.
If size d diminishes, then diminish with the distance of plasma, the temperature of the lower end side of the discharge space 111 thus during lighting can uprise.
Therefore, as shown in Figure 5, the temperature after the firm light-off in S5 is higher than the temperature after the firm light-off in S6.
As shown in Figure 5, when S5, along with the process of time, the temperature of S1 becomes the temperature lower than S5.Therefore, when S5, preferentially produce condensation at electrode 32.
On the other hand, when S6, because the temperature of S6 is all the time lower than the temperature of S1, thus preferentially produce condensation in the lower end side of discharge space 111.
Therefore, in the S5 that size d is less, during repeatedly carrying out lighting and light-off, the halide of indium lodges in the gap between electrode 32 and sealing 12 gradually, and the halid amount of the indium thus comprised in metal halide 2 tails off gradually.
Its result, can the rising of killer tube voltage.
In the S6 that size d is larger, the halid amount constant of the indium comprised in metal halide 2.
Therefore, can not the rising of killer tube voltage.
As mentioned above, if reduce size d, then can the rising of killer tube voltage.
But, if size d is too small, can produces and sew, lamp may be caused to extinguish.
Table 1 is the table of the proper range of the size d that the most long portion for illustrating illuminating part 11 internal diameter is divided.
[table 1]
As shown in Table 1, if the size d that the most long portion of the internal diameter of illuminating part 11 is divided is set to more than 1.5mm and below 2.3mm, then can the rising of killer tube voltage, and can suppress to sew and the lamp that causes extinguishes because producing.
In addition, it has been generally acknowledged that, if discharge lamp 100 repeatedly carries out lighting and light-off and makes the halid ratio of the indium being contained in metal halide 2 decline gradually, then tube voltage when lighting starts also can step-down gradually.But if the service time of discharge lamp 100 is elongated, then illuminating part 11 there will be melanism or gonorrhoea, temperature when lighting thus can be made to start rises.Therefore, if meet the discharge lamp 100 of above-mentioned condition, then tube voltage when lighting can be made to start maintains in predetermined scope.
Then, the gap furtherly between prescribed electrode 32 and sealing 12.
Gap between electrode 32 and sealing 12 can be formed in the following way.
Such as, after forming sealing 12 by press seal method or collapsed seal method etc., thus not yet gap is formed because electrode 32 and sealing 12 are close together.In cooling procedure after formation sealing 12, because of the difference of the thermal coefficient of expansion of material, the amount of contraction of electrode 32 is greater than the amount of contraction of sealing 12.Thus, between electrode 32 and sealing 12, form the gap be communicated with discharge space 111.
In addition, the metal forming 31 being present in the inside of sealing 12 can be complied with the contraction of sealing 12 and bend.Therefore, being formed in the cooling procedure after sealing 12, can suppress to form gap between sealing 12 and metal forming 31.That is, being close between sealing 12 and metal forming 31 can be maintained, thus can maintain the air-tightness being provided with the region of metal forming 31 of sealing 12.
At this, if be not formed with gap between electrode 32 and sealing 12, be then difficult to the effect obtaining above-mentioned killer tube voltage rise.
Therefore, in discharge lamp 100, for ease of forming gap, coil 33 is wound in the outside of electrode 32.
If coil 33 to be wound in the outside of electrode 32, then in the part that electrode 32 contacts with coil 33, electrode 32 and sealing 12 can be prevented to be close to.Therefore, it is possible to the area that minimizing electrode 32 and sealing 12 are close to, in the cooling procedure thus after formation sealing 12, easily form gap.
In addition, the contraction of sealing 12 can being complied with due to coil 33 and bend, thus being formed in the cooling procedure after sealing 12, following effect can also be obtained: the generation suppressing to arrive the crackle of the outside of sealing 12 etc.
(the second execution mode)
Then, the lamps apparatus for vehicle 200 involved by the second execution mode is described.
Lamps apparatus for vehicle 200 is the lamps apparatus for vehicle possessing above-mentioned discharge lamp 100.Fig. 6 is the schematic diagram of the structure for illustrating lamps apparatus for vehicle 200.
In addition, " front " in Fig. 6 refers to the front of the automobile being provided with discharge lamp 100, " rear " refers to the rear of the automobile being provided with discharge lamp 100, and " top " refers to the top of the automobile being provided with discharge lamp 100, and " below " refers to the below of the automobile being provided with discharge lamp 100.
The mode that Fig. 6 represents the pair of electrodes 32 one-tenth level being arranged at discharge lamp 100 installs the situation of discharge lamp 100.That is, exemplified with the situation making the horizontal lighting of discharge lamp 100.
Fig. 7 is the schematic diagram of the circuit for illustrating lamps apparatus for vehicle 200.
As shown in Figure 6, lamps apparatus for vehicle 200 is provided with: discharge lamp 100, reflector 202, shading control board 203, lens 204, lamp circuit 205.
Reflector 202 will irradiate the light forwards lateral reflection of coming from discharge lamp 100.Reflector 202 is such as made up of the metal etc. that reflectivity is higher.The inside of reflector 202 is provided with space, and inner surface parabolically shape.
Front side end and the rear side end of reflector 202 have opening.
The base 102 of discharge lamp 100 is installed near the opening of the rear side of reflector 202.The pipe cap 101 of discharge lamp 100 is positioned at the inner space of reflector 202.
Shading control board 203 is arranged on pipe cap 101 front side of the inside of reflector 202 and the lower side of pipe cap 101.
Shading control board 203 is made up of light-proofness materials such as metals.Arranging shading control board 203 is to form the luminous intensity distribution being called as "cut-off"line.Shading control board 203 is set to movable, by making shading control board 203 fall to the lower side, can switch to high beam from dipped headlights.
The opening of the front side of closed reflector 202 is arranged to by lens 204.Lens 204 can be convex lens.Lens 204 make from the direct incident light of discharge lamp 100, are reflected and the light optically focused of incidence by reflector 202, thus the luminous intensity distribution desired by being formed.
Lamp circuit 205 is the circuit maintaininged lights for making discharge lamp 100 start and make discharge lamp 100.As shown in Figure 7, lamp circuit 205 such as can possess start-up circuit 205a and ballast circuit 205b.
The DC power supply DS such as battery and interrupteur SW is electrically connected with at the input side of lamp circuit 205.Discharge lamp 100 is electrically connected with at the outlet side of lamp circuit 205.
Start-up circuit 205a such as comprises: transformer, capacitor, discharging gap, resistance etc.Start-up circuit 205a generates the high-voltage pulse of about 30kV, and puts on discharge lamp 100.Thus, between pair of electrodes 32, produce insulation breakdown, thus produce electric discharge.That is, by start-up circuit 205a star t-up discharge lamp 100.
Ballast circuit 205b such as comprises: DC/DC change-over circuit, DC/AC change-over circuit, current/voltage testing circuit and control circuit etc.Ballast circuit 205b maintains lighting of the discharge lamp 100 started by start-up circuit 205a.
Above, some execution modes of the present invention are illustrated, but these execution modes just illustrate, do not limit the intention of invention scope.These new execution modes can be implemented in other various mode, without departing from the spirit and scope of the present invention, can carry out various omission, displacement, change etc.These execution modes or its distortion all belong in scope of the present invention or aim, and are also contained in the invention and equivalent scope thereof recorded in technical scheme.Further, the respective embodiments described above can be implemented in the mode mutually combined.
Accompanying drawing explanation
Fig. 1 is the schematic diagram for illustrating the discharge lamp 100 involved by the first execution mode.
Fig. 2 is the chart for illustrating the relation between the halid ratio of indium and the change of tube voltage.
Fig. 3 is the signal chart for illustrating the situation that temperature declines.
Fig. 4 is the chart for illustrating the relation between the halid ratio of indium and the decline of luminous flux.
Fig. 5 is the signal chart for illustrating the situation that temperature declines.
Fig. 6 is the schematic diagram of the structure for illustrating lamps apparatus for vehicle 200.
Fig. 7 is the schematic diagram of the circuit for illustrating lamps apparatus for vehicle 200.

Claims (5)

1. a discharge lamp, is characterized in that, possesses:
Illuminating part, has discharge space in inside, and is sealed with the halid metal halide comprising indium at this discharge space;
Pair of electrodes, the inside to described discharge space is outstanding and be configured to across preset distance opposed,
The halid ratio being contained in the indium of described metal halide is more than 0.1wt% and below 0.33wt%,
On the direction orthogonal with the bearing of trend of described pair of electrodes of described discharge space, the size d that the most long portion of described discharge space is divided is more than 1.5mm and below 2.3mm.
2. discharge lamp according to claim 1, is characterized in that,
Described discharge lamp also possesses the sealing at the both ends on the bearing of trend of the described pair of electrodes being arranged at described illuminating part respectively,
Gap is provided with between described sealing and described electrode.
3. discharge lamp according to claim 1, is characterized in that,
By carrying out lighting and the light-off of described discharge lamp, the halide of indium is made to lodge in described gap.
4. a lamps apparatus for vehicle, is characterized in that, possesses:
Discharge lamp according to claim 1;
Lamp circuit, is electrically connected on described discharge lamp.
5. lamps apparatus for vehicle according to claim 4, is characterized in that,
The mode becoming level with the pair of electrodes being arranged at described discharge lamp installs described discharge lamp.
CN201380061281.5A 2012-11-30 2013-08-22 Discharge lamp and lamps apparatus for vehicle Active CN104813437B (en)

Applications Claiming Priority (3)

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JP2012-262997 2012-11-30
JP2012262997A JP6202462B2 (en) 2012-11-30 2012-11-30 Discharge lamp and vehicle lamp
PCT/JP2013/072447 WO2014083896A1 (en) 2012-11-30 2013-08-22 Discharge lamp and lighting tool for vehicle

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CN104813437B CN104813437B (en) 2017-07-18

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EP2927931A4 (en) 2016-07-13
CN104813437B (en) 2017-07-18
EP2927931B1 (en) 2017-11-22
WO2014083896A1 (en) 2014-06-05
EP2927931A1 (en) 2015-10-07
JP6202462B2 (en) 2017-09-27

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