CN101924009B - High-pressure discharge lamp - Google Patents
High-pressure discharge lamp Download PDFInfo
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- CN101924009B CN101924009B CN201010193392.XA CN201010193392A CN101924009B CN 101924009 B CN101924009 B CN 101924009B CN 201010193392 A CN201010193392 A CN 201010193392A CN 101924009 B CN101924009 B CN 101924009B
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- electrode
- heart yearn
- groove
- luminous tube
- discharge lamp
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Abstract
The invention provides a high-pressure discharge lamp with long service life, which is free of rupture caused by stress concentration near the sealing part. The lamp comprises a luminous tube made from quartz glass and sealing parts which extrude towards two ends of the luminous tube. The inner luminous tube is sealed with rare gas, over 0.15mg/mm3 mercury, 1 multiply 10 subtract 6 - 1 multiply 10 subtract 2 Mumol/mm3 halogen. The invention is characterized in that the lamp is provided with a pair of electrodes; an electrode core wire connected to the electrode is welded to a metal foil; one part of the electrode core wire and the metal foil are buried in the sealing part; a groove is disposed at the section periphery which is in orthogonal with the long edge of the electrode core wire; the side end of the groove sealing is disposed at the overlapping range between the metal foil and the electrode core wire.
Description
Technical field
The present invention relates to the high-pressure discharge lamp be widely used as projector light source.The characteristic high-pressure discharge lamp of shape tool of the electrode heart yearn that the electrode be particularly oppositely disposed in luminous tube connects.
Background technology
In the past, as the image projection device light source that the image projection devices such as projecting apparatus use, be widely used in the high-pressure discharge lamp that luminous tube inside is sealed with rare gas and mercury.This high-pressure discharge lamp such as encloses 0.15mg/mm in luminous tube inside
3above mercury, has the high pressure utilized in lighting process, in the characteristic of visible light whole area efficient ground radiating light.
As shown in Figure 9, by the luminous tube 102 of quartz glass with at the two ends of this luminous tube 102, outstanding sealing 103 is formed this high-pressure discharge lamp 101.In addition, inner at this luminous tube 102, the pair of electrodes 105 being configured with relative configuration and the electrode heart yearn 106 be connected with this electrode 105, in sealing portion 103, the metal forming 107 be connected with this electrode heart yearn 106 and to be welded in this metal forming 107 and the outside lead 108 carrying out supplying from the electric power of outside be embedded in form sealing portion 103 quartz glass in.In addition, in this luminous tube 102, such as 0.15mg/mm is sealed with
3above mercury, rare gas, such as 1 × 10
-6~ 1 × 10
-2μm ol/mm
3halogen.
This high-pressure discharge lamp 101 of this structure is when lighting, time such as with more than 150 atmospheric pressure high pressure lighting, the front end of this electrode 105 be made up of the tungsten as materials with high melting point becomes the high temperature of melting degree, this electrode 105 and the axially thermal expansion of this electrode heart yearn 106 at lamp.On the other hand, the sealing portion 103 being embedded with this electrode heart yearn 106 is made up of the quartz glass that coefficient of thermal expansion is very little.Due to this high-pressure discharge lamp 101 repeatedly lighting turn off the light, due to the thermal expansion rate variance in this electrode heart yearn 106 and sealing portion 103, between this electrode heart yearn 106 and sealing portion 103, produce larger stress, this high-pressure discharge lamp 101 self breaks, and this problem was from being exactly known in the past.
What cause in order to the larger stress solving the sealing portion 103 that this high-pressure discharge lamp 101 produces breaks, and have employed all countermeasures.As the technology relaxing this stress, such as, there are known special table 2008-529252 publication etc.According to this publication, describe as shown in Figure 10, the part that the quartz glass of major part, the i.e. sealing (not shown) of the electrode heart yearn 116 of connecting electrode 110 contacts is provided with the groove 114 of in fact long side direction.This groove 114 makes the area of quartz glass and this electrode heart yearn 116 close contact in fact reduce in sealing (not shown), has the effect relaxing the upper stress produced in sealing portion (not shown).
But, in this high-pressure discharge lamp 101 shown in Fig. 9, even if when arranging groove 114 shown in Figure 10 on this electrode heart yearn 106, due to the stress produced between sealing portion 103 and this electrode heart yearn 106, produce crack, there is the situation causing lamp self breakage, exist and the problem of breaking that groove 114 cannot prevent this high-pressure discharge lamp 101 fully is only set.
Patent documentation 1 Japanese Unexamined Patent Application Publication 2008-529252 publication
Summary of the invention
The problem to be solved in the present invention is to provide a kind of long-life high-pressure discharge lamp, with in high pressure-actuated high-pressure discharge lamp, can not crack near sealing, and the stress that can not produce near sealing concentrates breaking of causing.
The high-pressure discharge lamp that this invention is recorded, the outstanding sealing of the luminous tube by quartz glass and the two ends to this luminous tube is formed, and is sealed with rare gas, 0.15mg/mm in this luminous tube inside
3above mercury, 1 × 10
-6~ 1 × 10
-2μm ol/mm
3halogen, there is the pair of electrodes of relative configuration, weld with metal forming with the electrode heart yearn of this Electrode connection, a part for this electrode heart yearn and this metal forming are embedded in sealing portion, it is characterized in that, in this electrode heart yearn, on the long side direction of this electrode heart yearn, in the periphery entirety of the section orthogonal with this long side direction, be formed with groove, the sealed part side end of this groove is arranged on the scope of this metal forming and this electrode cores line overlap.
In addition, the high-pressure discharge lamp that this invention is recorded, is characterized in that, on the basis of said structure, be provided with the part without groove between the sealed part side end of above-mentioned groove and the end of this electrode heart yearn.
And then the high-pressure discharge lamp that this invention is recorded, it is characterized in that, on the basis of said structure, the discharge space side end of above-mentioned groove is configured in the part of the glass material being embedded in above-mentioned sealing.
High-pressure discharge lamp of the present invention is on the long side direction of electrode heart yearn, on the surface of this electrode heart yearn, groove is provided with in the periphery entirety of the section orthogonal with this long side direction, the sealed part side end of this groove is arranged on the scope of this metal forming and this electrode cores line overlap, therefore in sealing portion, this electrode heart yearn and glass material are moderately close to, even if thus turn off the light due to lighting and create the thermal expansion difference of this electrode heart yearn and this glass material, also can not put aside large stress in sealing portion, there is the advantage of the generation that can suppress crackle etc.
In addition, by being formed with the part without groove between the sealed part side end and the end of this electrode heart yearn of this groove, thus the stress that sealing portion produces can be reduced, there is the effect that can suppress the crackle that sealing portion produces etc. further.This point can be considered from following reason.When there is sealing in the end of this electrode heart yearn, glass material does not enter and the short space that formed.In this short space, the mercury enclosed in this luminous tube is delivered to this groove, and is carried in a large number after this high-pressure discharge lamp is turned off the light.This mercury be transferred by this high-pressure discharge lamp again lighting time, sharply to evaporate, thus the pressure increase in this short space.This pressure, on the basis of the thermal expansion difference of this electrode heart yearn and glass material, is wanted this electrode cores alignment discharge space side to move further, applies additional stress.This additional stress is reduced by being formed at the part without this groove, suppresses the conveying capacity of the mercury carried by this groove, consequently inhibits the generation of crackle.
And then, utilizing the part without this groove, there is no groove when welding this electrode heart yearn and this metal forming, therefore, it is possible to carry out practical welding, improve weld strength, there is the additional effect of the problem that this electrode heart yearn can be suppressed to peel off from this metal forming.
And then the discharge space side end of this groove is configured in the part being embedded in the glass material forming sealing portion, can suppress the generation of crackle further.This be due to, when lamp starts, near the root that unstable arc discharge is not fixed on this electrode heart yearn (from the part being embedded in this glass material of this electrode towards the region of discharge space side), glass material near this root is exceedingly heated, produce the thermal expansion rate variance of local, thus can not crack.
Accompanying drawing explanation
Fig. 1 is the general profile chart of the summary representing high-pressure discharge lamp of the present invention.
Fig. 2 is the detailed enlarged drawing representing electrode and the electrode heart yearn being configured at high-pressure discharge lamp of the present invention.
Fig. 3 is the cutaway view cut off on the direction being orthogonal to long axis direction by electrode heart yearn of the present invention.
Fig. 4 is the details drawing of the forming range representing the groove that electrode heart yearn of the present invention is formed.
Fig. 5 is the general profile chart of the shape of the sample of the forming range representing the groove confirmed in high-pressure discharge lamp of the present invention.
Fig. 6 is the table of the effect of the groove forming position representing high-pressure discharge lamp of the present invention.
Fig. 7 is the general profile chart representing other embodiments of the present invention.
Fig. 8 is the explanation skeleton diagram representing the crackle that existing high-pressure discharge lamp produces.
Fig. 9 is the general profile chart of the summary representing existing high-pressure discharge lamp.
Figure 10 is the figure representing existing electrode and the electrode heart yearn represented in known document.
Embodiment
The feature of high-pressure discharge lamp of the present invention is, the electrode heart yearn that electrode connects forms groove, the scope arranging this groove is formed at the scope that is embedded in the glass material of the outstanding sealing in the two ends of the luminous tube of this high-pressure discharge lamp and the end of a side of this groove is formed at this electrode heart yearn scope overlapping with metal forming.By this formation, suppress the stress that sealing portion produces, there is the effect that can provide long-life high-pressure discharge lamp that can not to crack etc.
Embodiment 1
Fig. 1 represents the outline of high-pressure discharge lamp 1 of the present invention.This high-pressure discharge lamp 1 is made up of luminous tube 2 and the sealing 3 outstanding to the two ends of this luminous tube 2.In addition, there is in the inside of this luminous tube 2 pair of electrodes 5 of relative configuration, sealing portion 3 have: the electrode heart yearn 6 be connected with this electrode 5, with the metal forming 7 of the welding edges of a side of this electrode heart yearn 6, the outside lead rod 8 with the welding edges of the opposing party of this metal forming 7.In addition, on this electrode heart yearn 6, the groove 4 parallel with the long axis direction of this electrode heart yearn 6 is arranged on the outer surface of this electrode heart yearn 6.This groove 4 moderately relaxes being close to of the glass material in this electrode heart yearn 6 and sealing portion 3, can suppress when this electrode heart yearn 6 is strongly close to sealing portion 3, the generation of the crackle that the stress that sealing portion 3 produces with the thermal expansion rate variance of this electrode heart yearn 6 causes.
Fig. 2 represents the electrode 5 of configuration and the enlarged drawing of electrode heart yearn 6 on this high-pressure discharge lamp 1.In case of the present embodiment, this electrode 5 is cut out by cut by same material with this electrode heart yearn 6.The front of this electrode 5 relative in this luminous tube 2 is formed with microspike 11, and this electrode heart yearn 6 that the body outer diameter of this electrode 5 is formed as than being connected with this electrode 5 is thick.In addition, on this electrode heart yearn 6, the groove 4 that the long axis direction along this electrode heart yearn 6 is formed is formed on the surface.In addition, in the present embodiment, on the end 12 of a side of this electrode heart yearn 6, the part not being formed with this groove 4 is provided with.In addition, in the arrow A-A shown in this electrode heart yearn 6 of this Fig. 2, the cutaway view cut off at the section orthogonal with the axle of the long axis direction with this electrode heart yearn 6 as shown in Figure 3.
Fig. 3 represents the A-A section in Fig. 2.Fig. 3 (a) is the cutaway view of the outer peripheral edges entirety of the direction of principal axis section representing this electrode heart yearn 6.This groove 4 is formed in the outer peripheral edges entirety of this electrode heart yearn 6.In addition, Fig. 3 (b) is the enlarged drawing of Fig. 3 (a).This groove 4 is formed by the small valley 16 formed between small mountain portion 15.The degree of depth D of the spacing P that this mountain portion 15 is formed and this valley 16 is such as spacing P=40 μm, degree of depth D=6 μm.This groove 4 is formed by this fine spacing and the degree of depth, the situation that the glass material therefore not having the sealing portion 3 shown in Fig. 1 is close to this electrode heart yearn 6 brute force, keeps, therefore have the effect of the generation that can suppress crackle etc. with the intensity of appropriateness.
Fig. 4 is the phantom of the electrode side of the side only representing high-pressure discharge lamp 1 of the present invention.The sealing portion 3 of this high-pressure discharge lamp 1 shown in Fig. 4 is configured with the metal forming 7 sealed by the glass material forming sealing portion 3 (quartz glass); And this electrode heart yearn 6 to weld with this metal forming 7.In addition, be connected in sealing portion 3 with this electrode heart yearn 6 connecting electrode 5 and be configured at the inside of luminous tube 2.In addition, this electrode heart yearn 6 is formed with this groove 4 along long axis direction.Below describe the forming range of this groove 4.The end 21 of one side of this groove 4 is formed at the scope of this electrode heart yearn 6 part B overlapping with this metal forming 7.In addition, the end 22 of the opposing party of this groove 4 is formed at the scope of the part C of this metal forming 7 side from sealing portion 3 and the border of this luminous tube 2, be configured to the inside that this end 22 can not be projected into this luminous tube 2.The end 21,22 of this groove 4 is formed at this scope, therefore can not there is the situation of the stress guide fracturing line generation that this electrode heart yearn 6 produces due to thermal expansion difference between the glass material in sealing portion 3, there is the advantage that can provide long-life high-pressure discharge lamp.
Fig. 5 represents the sample shape of the experiment that the forming range for studying this groove 4 carries out.Fig. 5 (a) ~ (f) is the phantom of this high-pressure discharge lamp 1 shown in Fig. 4, and the forming range of this groove 4 is different.
A the end 22 of luminous tube 2 side of this groove 4 in () is arranged on the position buried underground by the glass material of side, sealing portion 3.In addition, the end 21 of this metal forming 7 side is arranged on this metal forming 7 scope overlapping with this electrode heart yearn 6 outer (luminous tube 2 side).
Secondly, about the end 22 of this luminous tube 2 side in (b), same with above-mentioned (a), but the position of the end 21 of this metal forming 7 side is different.This end 21 is arranged on the scope of this metal forming 7 and this electrode heart yearn 6 overlap, and the end 12 of this electrode heart yearn 6 exists the part not being formed with this groove 4.
C end 22 and (a) of luminous tube 2 side of this groove 4 in (), (b) are same.Till the end 21 of this metal forming 7 side is set to the end 12 of this electrode heart yearn 6.
D, in (), the end 22 of luminous tube 2 side of this groove 4 enters into this luminous tube 2 inside, and this point is different.The end 21 of this metal forming 7 side is identical with the situation of above-mentioned (a).
E (), in the same manner as (d), it is different that the end 22 of luminous tube 2 side of this groove 4 enters into the inner this point of this luminous tube 2, and the end 21 of this metal forming 7 side is the situation identical with above-mentioned (b).
F (), in the same manner as (d), (e), it is different that the end 22 of luminous tube 2 side of this groove 4 enters into the inner this point of this luminous tube 2, and the end 21 of this metal forming 7 side is the situation identical with above-mentioned (c).
Fig. 6 represents in each sample shape shown in Fig. 5, to the table of the result that the forming range of this groove 4 is studied.This high-pressure discharge lamp 1 of each sample shape shown in Fig. 5 is respectively made 10, carries out lighting experiment.In addition, this high-pressure discharge lamp 1 used is modulating voltage is 65V, and lamp current is the type of the 230W of 3.5A, carries out interchange lighting with specified input.In addition, the startup of this high-pressure discharge lamp 1 employs the ignition device of the interchange producing high pressure.Lighting as this test is turned off the light test, under lighting in 45 minutes, the condition of turning off the light for 30 minutes, observes the crackle that lighting after 1000 hours, sealing portion 3 produces.In addition, in order to observe this crackle, use light microscope, with the multiplying power of about 5 times by amplifying observation near sealing portion 3.When observing crackle in this observation, be judged to be can not, with × represent.In addition, when not observing crackle, being judged to be good, representing with zero or ◎.In addition, as an example of this crackle, such as, as shown in Figure 8, in the sealing portion 3 continuing this luminous tube 2, be embedded near part that this metal forming 7 in glass material welds with this electrode heart yearn 5 and produce multiple small crackle 85.
Sample shown in Fig. 5 (a) (sample a) in, the scope being formed at this groove 4 of this electrode heart yearn 6 is arranged to, the end 22 of this luminous tube 2 side is buried underground by the glass material of side, sealing portion 3, and the end 21 of this metal forming 7 side is arranged on this metal forming 7 scope overlapping with this electrode heart yearn 6 outer (luminous tube 2 side).So, owing to not forming this groove in the scope that this metal forming 7 is overlapping with this electrode heart yearn 6, therefore can not be formed and moderately absorb the space with the thermal expansion difference of glass, and create crackle.Therefore, as its judge, for can not, in figure 6 with × represent.
Sample (sample b) shown in Fig. 5 (b) is shape of the present invention, till this groove 4 being formed at this electrode heart yearn 6 is formed into the connecting portion of this metal forming 7 this electrode heart yearn 6 overlapping with this electrode heart yearn 6.In this sample, do not have to produce the crackle observed in this sample a.Therefore, judge as it, be best result, represent with ◎ in figure 6.
Sample (sample c) shown in Fig. 5 (c) is the situation that this groove 4 being formed at this electrode heart yearn 6 is formed into till the end 12 of this electrode heart yearn 6.Due to this groove 4, the space of the appropriateness between the glass material defining and formed sealing portion 3, moderately can absorb the thermal expansion difference of this glass material and this electrode heart yearn 6, can not form crackle.But, till this groove 4 is formed into the end of this electrode heart yearn 6, therefore a part for the mercury of luminous tube 2 inside condenses upon the short space of the end being formed at this electrode heart yearn 6, there is the situation that the luminescence producing this high-pressure discharge lamp 1 self becomes unstable problem.Further, when by this high-pressure discharge lamp 1 again lighting there is the situation that this mercury condensed produces unnecessary stress.Therefore, as judgement, for good, represent with zero in figure 6.
In sample (sample d, sample e, sample f) shown in Fig. 5 (d) to (f), the formation of this metal forming 7 side is identical with the situation of above-mentioned (a), (b), (c) respectively, but the end 22 of this groove 4 of this luminous tube 2 side is different to the inner outstanding formation this point of this luminous tube 2.When lantern test is carried out to above-mentioned each sample, during lighting, the arc discharge of local is fixed on the end 22 of this groove 4 to this outstanding electrode heart yearn 6 of this luminous tube 2 side, by heating the glass material etc. near this end 22 partly, all creates crackle in either case.Therefore, as judgement, for can not, in figure 6 with × represent.
Fig. 7 is other embodiments that high-pressure discharge lamp 1 of the present invention relates to.This high-pressure discharge lamp 1, in the same manner as Fig. 1, is made up of luminous tube 2 and the sealing 3 outstanding to the two ends of this luminous tube 2.Further, other formation is also substantially same, but the pair of electrodes 55 be oppositely disposed in the inside of this luminous tube 2 is at the front-end configuration coil 56 of this electrode heart yearn 6, and the melt electrode this point that this fore-end is formed as melting is different.On electrode heart yearn 6, be formed with this groove 4 in the same manner as the situation of Fig. 1, there is following same effect: the generation of the crackle that the stress that sealing portion 3 and the thermal expansion rate variance of this electrode heart yearn 6 can be suppressed to cause causes.And, in the present embodiment, this electrode 55 is expressed as melt electrode, and what represent in Fig. 1 is cut electrode, but no matter the shape of this electrode is form with this electrode heart yearn one or form as miscellaneous part, and various mode this point can be taked to be self-explantory.
Claims (1)
1. a high-pressure discharge lamp, the outstanding sealing of the luminous tube by quartz glass and the two ends to this luminous tube is formed, inner at this luminous tube, is sealed with rare gas, 0.15mg/mm
3above mercury, 1 × 10
-6~ 1 × 10
-2μm ol/mm
3halogen, there is the pair of electrodes of relative configuration, each described electrode and electrode heart yearn are cut by cutting by same material, weld with metal forming with the described electrode heart yearn of the described Electrode connection cut by cutting, a part and this metal forming of this electrode heart yearn are embedded in sealing portion, it is characterized in that
In this electrode heart yearn, groove is formed on the long side direction of this electrode heart yearn, in the periphery entirety of the section orthogonal with this long side direction, the sealed part side end of this groove is arranged on the scope of this metal forming and this electrode cores line overlap, and being formed with the part without groove between the sealed part side end of above-mentioned groove and the end of this electrode heart yearn, the discharge space side end of above-mentioned groove is configured in the part of the glass material being embedded in above-mentioned sealing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-138868 | 2009-06-10 | ||
| JP2009138868A JP4924664B2 (en) | 2009-06-10 | 2009-06-10 | High pressure discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101924009A CN101924009A (en) | 2010-12-22 |
| CN101924009B true CN101924009B (en) | 2014-12-24 |
Family
ID=43338848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010193392.XA Active CN101924009B (en) | 2009-06-10 | 2010-05-27 | High-pressure discharge lamp |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4924664B2 (en) |
| CN (1) | CN101924009B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011034758A (en) * | 2009-07-31 | 2011-02-17 | Ushio Inc | High-pressure discharge lamp |
| EP2777063B1 (en) | 2011-09-30 | 2017-03-08 | Koninklijke Philips N.V. | Discharge lamp |
| JP2017027765A (en) | 2015-07-22 | 2017-02-02 | セイコーエプソン株式会社 | Discharge lamp, method of manufacturing discharge lamp, light source device and projector |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1574187A (en) * | 2003-06-03 | 2005-02-02 | 优志旺电机株式会社 | Short arc ultra-high pressure mercury lamp and process for producing such a lamp |
| CN101116166A (en) * | 2005-02-04 | 2008-01-30 | 皇家飞利浦电子股份有限公司 | A lamp with quartz bulb and electrode rods having longish grooves |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55109357A (en) * | 1979-02-16 | 1980-08-22 | Ushio Inc | Structure of conductor at valve sealing part |
| CA1206312A (en) * | 1981-10-08 | 1986-06-24 | Seymour Schmukler | Composite structures and method of making same |
| JPS5899764A (en) * | 1981-12-09 | 1983-06-14 | Mitsubishi Electric Corp | Frequency detector |
| JPH05198284A (en) * | 1991-09-30 | 1993-08-06 | Toshiba Lighting & Technol Corp | Metal halide lamp |
| JP3204122B2 (en) * | 1996-10-02 | 2001-09-04 | 松下電器産業株式会社 | Metal halide lamp |
| JPH10241630A (en) * | 1997-02-24 | 1998-09-11 | Matsushita Electron Corp | Lamp |
| JP2009105062A (en) * | 2009-01-16 | 2009-05-14 | Ushio Inc | Short-arc type extra high-pressure mercury lamp |
-
2009
- 2009-06-10 JP JP2009138868A patent/JP4924664B2/en not_active Expired - Fee Related
-
2010
- 2010-05-27 CN CN201010193392.XA patent/CN101924009B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1574187A (en) * | 2003-06-03 | 2005-02-02 | 优志旺电机株式会社 | Short arc ultra-high pressure mercury lamp and process for producing such a lamp |
| CN101116166A (en) * | 2005-02-04 | 2008-01-30 | 皇家飞利浦电子股份有限公司 | A lamp with quartz bulb and electrode rods having longish grooves |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4924664B2 (en) | 2012-04-25 |
| JP2010287359A (en) | 2010-12-24 |
| CN101924009A (en) | 2010-12-22 |
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