WO2004112086A1 - メタルハライドランプ - Google Patents
メタルハライドランプ Download PDFInfo
- Publication number
- WO2004112086A1 WO2004112086A1 PCT/JP2004/005652 JP2004005652W WO2004112086A1 WO 2004112086 A1 WO2004112086 A1 WO 2004112086A1 JP 2004005652 W JP2004005652 W JP 2004005652W WO 2004112086 A1 WO2004112086 A1 WO 2004112086A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal
- tube
- arc tube
- lamp
- lamp according
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—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
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
- H01J61/827—Metal halide arc lamps
Definitions
- the present invention relates to a metal halide lamp including an arc tube formed of a translucent ceramic.
- the arc tube of a metal octaride lamp is formed of quartz glass, but in recent years, the arc tube has been formed of translucent ceramics, which has better heat resistance, shape stability, and anti-halidity than quartz. The adoption of is being actively promoted.
- rare earth octogenide such as an octogenated display in an arc tube in order to obtain white radiation having higher color rendering properties.
- 34 4 65 Publication (Page 2) Since rare earth halides have continuous emission due to molecular emission as well as atomic emission in the visible region, they can be suitably used as an enclosure for a white light source.
- FIG. 1 is a sectional view showing an arc tube used in a conventional metal halide lamp.
- the illustrated arc tube has a main tube 6 formed of a translucent ceramic such as alumina, and narrow tubes a and 7 b connected to the main tube 6.
- the main pipe 6 has a substantially cylindrical shape, and the capillaries a and b extend in the axial direction from both flat end faces.
- the capillary tubes a and 7b have an elongated cylindrical shape, and the introduction wires 9a and 9b having the electrodes 5a and 5b at the tip are inserted into the corresponding capillary tubes a and b.
- the electrodes 5a and 5b and the lead wires 9a and 9b are sometimes collectively referred to as "electrode wires").
- the lead wires 9a and 9b inserted into the thin tubes 7a and 7b are fixed to the end portions a and 7b at the sealing portions 8a and 8b of the thin tubes a and b. This fixing is performed by using the sealing materials 1a and 10b made of the glass frit described above.
- FIG. 2 is an enlarged sectional view of the sealing structure at one end of the thin tube 7a.
- a similar sealing structure is formed at one end of another thin tube 7b.
- the gap between the capillary tube a and the lead-in wire 9a is filled with a sealing material 1a, whereby the inside of the arc tube 1 is shielded from the outside.
- Rare earth elements suitably used in metal halide lamps Androgenic compound (such as D y I 3), when come to dispersed expanding the surface of the sealing member 1 ⁇ a from the main pipe, the liquid-phased on the surface of the sealing member 1 0 a, and the sealing material 1 O a On the contrary, it erodes. As a result, there is a danger that sealing leakage will occur in the future, greatly shortening the lamp life.
- Page 2 discloses a metal octaride lamp in which an electric insulating layer is provided on the surface of a sealing material.
- Japanese Patent Application Laid-Open No. Hei 9-24092 page 2) teaches that a groove is formed in an electric conductor
- Japanese Patent Application Laid-Open No. Hei 10-502262 Page 2 teaches the use of encapsulants that are not prone to erosion.
- erosion of the sealing material by the encapsulated rare earth octogenide is suppressed, but the structure of the metal halide lamp is reduced.
- the present invention has been made to solve the above problems, and a main object of the present invention is to simplify the erosion of a sealing material by a rare earth octalogenide enclosed in an arc tube formed of translucent ceramics. Therefore, it is an object of the present invention to provide a new metal eight-ride lamp that can be suppressed.
- the metal octaride lamp of the present invention is a metal octaride lamp having an arc tube and a first metal halide sealed in the arc tube, wherein the first metal halide is a dysprosium or a holmium. At least one metal octylogenide selected from the group consisting of metal and thulium, wherein the arc tube comprises a main tube made of translucent ceramics, and a first end of the main tube.
- a pair of electrode wires having a front end facing each other, and each end of the first and second thin tubes is sealed with a sealing material, and the surface of the sealing material is reduced.
- a part communicates with the inside of the main tube through a gap formed between the inner wall of the thin tube and the surface of the electrode wire.
- a second metal octogenide exhibiting a lower vapor pressure than the vapor pressure of the first metal halide is obtained.
- the arc tube has a portion whose inner diameter as near Dzugu decreases monotonically to the end.
- the vapor pressure of the second metal halide is not more than "1/1" of the vapor pressure of the first metal halide.
- the sealing material is formed of glass. Te shiru.
- the second metal octogenide is an octogenide of at least one metal selected from the group consisting of calcium, strontium, barium, lanthanum, samarium, and europium.
- the second metal octogenide is a metal bromide.
- the amount of the enclosed second metal eight androgenic compound is 0.0 5 mg / cm 3 or more completion. 5 mgcm 3 is set within the following range.
- the molar ratio of the amount of the second metal octalogenide to the amount of the first metal octalogenide is 0.5 or more and 8 or less.
- the translucent ceramic is alumina.
- the arc tube and the first and second thin tubes are formed in a body.
- the arc tube has a hollow substantially ellipsoidal shape.
- a lamp module according to the present invention includes any one of the metal halide lamps described above and a reflector for projecting light emitted from the metal octaride lamp in a predetermined direction.
- the display device of the present invention includes the above-described metal eight-ride lamp, and a display panel that displays an image by temporally and spatially modulating light emitted from the metal eight-ride lamp. ing. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a cross-sectional view showing a configuration of a conventional arc tube used for a metal eight-ride lamp.
- FIG. 2 is a cross-sectional view schematically showing a sealing structure in the arc tube of FIG.
- FIG. 3 is a front view showing an embodiment of a metal eight-ride lamp according to the present invention.
- FIG. 4 is a sectional view showing the arc tube in the embodiment of FIG.
- FIG. 5 is a schematic diagram showing the effect of the second metal octalogenide.
- FIG. 6 is a graph showing the vapor pressure and the melting point of the first metal octogenide and the second metal octogenide.
- Figure (a) is a cross-sectional view showing a conventional arc tube in which the second metal octogenogen is in a liquid phase.
- FIG. 3 is a cross-sectional view showing the arc tube of the present embodiment that flows as it is.
- FIG. 8 is a cross-sectional view schematically showing a state in which the second metal octalogenide flowing into the thin tube dilutes the first metal octalogenide.
- FIG. 9 is a sectional view showing the shape of another arc tube suitably used for the metal octride lamp according to the present invention.
- a metal octalogide having a lower vapor pressure than the rare earth octalogenide is sealed in the arc tube.
- a metal halide having a relatively high vapor pressure more specifically, an octylogenide of at least one metal selected from the group consisting of dysprosium, holmium, and thulium is referred to as a “first metal halide”.
- the metal octogenide having a lower vapor pressure than the first rare earth octogenide is referred to as “second metal octogenide”.
- the second metal octalogenide is calcium, strontium. At least one metal selected from the group consisting of iron, barium, lanthanum, samarium, and europium.
- steam pressure in this specification indicates the value of the steam pressure at the temperature of the sealing portion when the lamp is turned on.
- the second metal octalogen in the arc tube penetrates into the low-temperature capillary and becomes a liquid phase, so the first metal octalogen on the surface of the encapsulant Metal octylogenide) having the above-mentioned diluent to suppress anti-JiEi.
- An enclosure with a low vapor pressure is useful because even a large amount of enclosure has little effect on light color.
- the vapor pressure of the second metal octalogenide must be less than 1/10 of the vapor pressure of the first metal octalogenide. Is preferred.
- the temperature of the exposed sealing portion can be reduced.
- the second metal halide having a low vapor pressure condenses more near the surface of the encapsulant, and dilutes the first metal octalogenide.
- the temperature of the surface of the sealing material is lowered, there is an advantage that the effect of suppressing the erosion and erosion is increased.
- FIG. 3 is a cross-sectional view illustrating a schematic configuration of a metal octride lamp of the present embodiment including a ceramic arc tube 1
- FIG. 4 is an enlarged cross-sectional view of the arc tube 1.
- the illustrated metal halide lamp of the present embodiment is designed to emit light with an operating power of 150 W.
- An arc tube 1 made of a ceramic having translucency is incorporated in an outer tube 2 sealed by a stem 3. More specifically, the arc tube 1 is fixed to metal wires 3 a and 3 b extending from the stem 3, and is supported at a substantially central portion of the outer tube 2 by the metal wires 3 a and 3 b. It is in.
- the metal wires 3 a and 3 b are electrically connected to a base 4 provided at one end of the outer tube 2, function as a support member for the arc tube 1, and supply a necessary current to the arc tube 1. It also functions as a conductive member.
- the arc tube 1 is made of translucent ceramics, and has a main tube 6 and thin tubes a and b connected to the main tube 6.
- the main pipe 6 has a first cylindrical portion having an outer diameter of 12.2 Omm, and a portion (taper portion) in which the outer diameter and the inner diameter monotonously decrease toward the end.
- the portion of the main pipe 6 where the inner diameter of the taper portion is the smallest is connected to a small second cylindrical portion into which the ends of the narrow tubes a and b are inserted.
- Each of the thin tubes 7a and 7b has an outer diameter of 3.2 mm and an inner diameter of 1..
- the main pipe 6 not only that, it is made of alumina 7a, which is a translucent ceramic.
- Lead wires 9a and 9b (electrode wires) each having a pair of electrodes 5a and 5b at the tip are inserted into the capillary tubes a and 7b, respectively.
- the introductory lines 9a and 9b are formed of two beams having a diameter of 0.9 mm.
- the lead-in wires 9a and 9b are connected to the metal wires 3a and 3b shown in Fig. 3, and receive power required for operation from outside via the base 4.
- a voltage is applied between the electrodes 5 &, 5 b via the lead-in wires 9 a, 9, and discharge of the gas sealed inside the arc tube 1 occurs, thereby emitting light. .
- the introductory lines 9a and 9b inserted into the capillaries a and b are fixed to the capillaries a and b at the sealing portions 8a and 8b of the capillaries a and 7b.
- This fixing is performed using a sealing material made of glass frit, and the gap between the thin tubes 7a and 7b and the introduction wires 9a and 9b is filled with a sealing material.
- the electrodes 5a and 5b located at the tips of the introduction lines 9a and 9b are opposed to each other at a predetermined distance. After adjusting the insertion depth, it is fixed. In FIG. 4, the description of the sealing material is omitted.
- a predetermined amount of mercury, argon serving as a starting rare gas, and a second metal halide are sealed inside the arc tube 1 having the above-described configuration.
- the second metal octogenide having a lower vapor pressure than the vapor pressure of the first metal octogenide in the arc tube 1 is used.
- it is an octogenide (eg, bromide) of at least one metal selected from the group consisting of calcium, strontium, barium, lanthanum, samarium, and europium. It is preferable to set the amount of such a second metal halide to be enclosed in a range of not less than 0. OS mg Z cm 3 and not more than 5 mg / cm 3 .
- a rare gas of neon, cryptone, and / or xenon may be used.
- FIG. 5 (a) schematically shows a state in which disprosium iodide (DyI 3 ), which is a typical first metal octogenide, adheres to the surface of the sealing material.
- FIG. 5 (b) schematically shows the surface of the sealing material when the second metal octalogenide (X) having a lower vapor pressure than the disodium iodide is sealed in the arc tube. Show me. Since the second metal octalogenide (X) has a relatively low vapor pressure, it liquefies on the surface of the sealing material, which is the coldest point.
- the first metal octalogenide such as dysprosium iodide will not easily adhere to the surface of the encapsulant, and the first metal octalogenide on the surface Dilution of the compound occurs. Therefore, according to the configuration of the present embodiment, erosion and deterioration of the sealing material are effectively prevented, and the lamp life is greatly extended.
- the second metal octogenide that can be suitably sealed in the arc tube has a vapor pressure that is lower by about one digit (1/10) than that of the first metal octogenide sealed in the arc tube.
- FIG. 6 shows the vapor pressure (value at 80 ° C.) and the melting points of various second metal halides. The reason why the vapor pressure at 800 ° C. is described in FIG. 6 is that the temperature (the coldest point) of the sealing portion becomes about 800 ° C. in the lamp operation in the present embodiment.
- the vapor pressure of these first metal octogenides at 800 ° C is equal to or higher than 0.1 [T o 'r]. Since the vapor pressure of the second metal halide is preferably not more than one tenth of the vapor pressure of the first metal halide, the vapor pressure at 8.0 ° C. is 0.01 torr. when the use of the following metal halide in accordance with a preferred. experiment, favorable results were obtained when in particular used C a B r 2 in the second metal halide thereof.
- One or more calcium, strontium, barium, lanthanum, samarium, and / or europium octalogides may be used if they exhibit a vapor pressure lower than the vapor pressure of the metal halide.
- Fig. 7 (a) shows a case in which a low vapor pressure second metal halide is sealed in a main pipe of a conventional structure without a tapered portion (comparative example), and Fig. 7 (b) shows a tapered portion with a tapered portion.
- the case where the second metal octalogenide is sealed in the main pipe (this embodiment) is shown.
- the temperature of the main pipe 6 decreases at the corners, and the second metal octalogenide in the liquid phase is formed at the corners, and the temperature decreases.
- the first metal octalogenide cannot be sufficiently diluted on the surface of the encapsulant, so that the deterioration of the sealing portion may be reduced. It cannot be prevented effectively.
- the tapered portion is formed in the main pipe 6 in the column shown in FIG. It is difficult to form a part with a low temperature so that the octogenide is liquefied.
- the second metal halide in the gas phase flows along the taper portion into the capillary tube, so that the amount of the second metal octogenide reaching the surface of the sealing material increases.
- the sealing material 1 0 a sufficient amount of the second metal eight necked Gen product that has reached the surface of the (X) is diluted first metal eight androgenic compound such as D y I 3, sealing
- first metal eight androgenic compound such as D y I 3
- sealing The state where the material 10a is protected is schematically shown.
- the second metal octogenide (X) liquidized on the surface of the sealing materials 10a and 10b can sufficiently dilute the first metal octogenide. Leakage can be effectively prevented.
- the shape of the tapered portion is not limited to a shape having a linear cross section, and for example, as shown in FIG. 9, a tapered portion may be formed by a curved surface.
- the shape of the central portion of the main pipe 6 sandwiched between the two tapered portions is not limited to a cylinder. Specified by the shape of main pipe 6 Even if the internal space to be formed has a substantially elliptical shape as a whole, it is sufficient that the temperature of the main pipe 6 can be increased to such an extent that the second metal octalogenide does not accumulate in the main pipe 6.
- the unit is mg Z cm.
- the numerical value in Table 1 is the ratio of the enclosed amount (mg) to the volume (internal volume) of the main pipe 6 (unit is [mgZcm 3 ]).
- the lamp of specification A shown in Table 1 uses a cylindrical arc tube without a tapered portion, and the lamp of specifications B and C uses the arc tube with a tapered portion shown in Fig. 4. You.
- disodium iodide (Dy I 3 ) is sealed as the first metal halide, and thallium iodide (T 1 I 3 ) and sodium iodide (Na I ) Is sealed.
- the specification A and specification C lamps It encloses calcium bromide, which has a lower vapor pressure than sprosium.
- the above life test lamp was subjected to a life test in a cycle of 5.5 hours on, 0 hours, and 5 hours off using an electronic ballast with a square wave with a secondary open-circuit voltage of 285 [V].
- Table 2 shows the results of the above life test.
- the sealing portion leak erosion by the first metal eight androgenic compound encapsulating the cause, closely related to the eight halogenated compounds other than the light-emitting tubular bend down and rare earth I found it.
- the encapsulated calcium bromide is mainly condensed at the end of the main pipe, so that the effect of suppressing erosion is weak.
- the vapor pressure of thallium iodide and sodium iodide was higher than that of disodium iodide, so that the amount of liquid phase entering the narrow tube was small, and erosion could not be suppressed.
- the preferred range is 0.5 ⁇ (X / N) ⁇ 5, and the particularly preferred range is , 1.2 ⁇ (XZN) ⁇ 4.
- the second metal octalogenide having a relatively low vapor pressure even if it is added in a relatively large amount, it is hard to adversely affect luminescence.
- the preferred range is 0.5 ⁇ (X / N) ⁇ 5, and the particularly preferred range is , 1.2 ⁇ (X / N) ⁇ 4.
- diprothium iodide (Dy I 2 ) is used as the first metal octalogenide, but a lanthanide scandium halide such as holmium and llium, or a combination thereof is used. May be used.
- Dy I 3, Ho I 3 , Tm l 3, Dy B r 3, H o B r 3, T m B r 3 , etc. are preferably used et al Be
- C a B r 3 instead of encapsulated calcium bromide to suppress erosion of the sealing material (C a B r 3), or, in addition to calcium bromide, Sutoronchi ⁇ beam, barium, lanthanum, samarium, Yu port Piu ⁇ etc. Similar results can be obtained with octogenides having a low vapor pressure or a combination thereof. Specifically, C a I 2 , C a B r 2 , S r I 2 , S r B r 2 , B a I 2 x L a B r 3 , Sm l 2 , E l 2 , Eu B r 2 It is preferably used.
- bromide in particular tends to have a lower vapor pressure than iodide, as shown in Fig. 6, so the effect of diluting the first metal octogenide by liquid phase is effective. High and preferred.
- the bromide iodide of Ca has a relatively high vapor pressure among the second metal halides, a part thereof tends to evaporate and participate in the discharge.
- Ca has the property of improving the light color of the discharge. For this reason, when it is desired to achieve both a longer life and an improved light color, it is particularly preferable to add a halide of calcium, which is the leading metal among the octogenides of the second metal. .
- a calcium octogenide when it is desired to intentionally evaporate a part of the compound to enhance the effect on discharge, it is preferable to use calcium iodide having a higher vapor pressure than calcium bromide.
- the entire luminous tube including the thin tube is provided inside the outer tube (translucent protective tube).
- the second metal octalogenide in the liquid phase is contained in the thin tube. Scattered.
- the sealing portion of the thin tube is exposed to the outside of the protective tube, the temperature of the exposed portion decreases, so that most of the second metal halide is easily condensed on the surface of the sealing portion. When such condensation occurs, erosion of the sealing portion can be more effectively suppressed.
- the second metal octogenide having a sufficiently low vapor pressure at the temperature of the sealing portion when the lamp is turned on is sealed in the arc tube having a tapered portion at the rain end, thereby causing a leak at the sealing portion.
- the erosion of the sealing material by the first metal octylogen compound can be suppressed. Therefore, according to the present invention, it is possible to provide a metal octaride lamp having no leakage at the sealing portion for a long period of time.
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Abstract
Description
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2004800159506A CN1802725B (zh) | 2003-06-16 | 2004-04-20 | 金属卤化物灯 |
JP2005506875A JP3778920B2 (ja) | 2003-06-16 | 2004-04-20 | メタルハライドランプ |
US11/291,628 US7679290B2 (en) | 2003-06-16 | 2005-12-01 | Metal halide lamp with light-transmitting ceramic arc tube |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003170508 | 2003-06-16 | ||
JP2003-170508 | 2003-06-16 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/291,628 Continuation US7679290B2 (en) | 2003-06-16 | 2005-12-01 | Metal halide lamp with light-transmitting ceramic arc tube |
Publications (1)
Publication Number | Publication Date |
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WO2004112086A1 true WO2004112086A1 (ja) | 2004-12-23 |
Family
ID=33549428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/005652 WO2004112086A1 (ja) | 2003-06-16 | 2004-04-20 | メタルハライドランプ |
Country Status (4)
Country | Link |
---|---|
US (1) | US7679290B2 (ja) |
JP (1) | JP3778920B2 (ja) |
CN (1) | CN1802725B (ja) |
WO (1) | WO2004112086A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007273378A (ja) * | 2006-03-31 | 2007-10-18 | Matsushita Electric Ind Co Ltd | メタルハライドランプ及び照明装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9552976B2 (en) | 2013-05-10 | 2017-01-24 | General Electric Company | Optimized HID arc tube geometry |
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- 2004-04-20 WO PCT/JP2004/005652 patent/WO2004112086A1/ja active Application Filing
- 2004-04-20 CN CN2004800159506A patent/CN1802725B/zh not_active Expired - Fee Related
- 2004-04-20 JP JP2005506875A patent/JP3778920B2/ja not_active Expired - Fee Related
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2005
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JP2001345064A (ja) * | 2000-06-01 | 2001-12-14 | Japan Storage Battery Co Ltd | メタルハライドランプ |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007273378A (ja) * | 2006-03-31 | 2007-10-18 | Matsushita Electric Ind Co Ltd | メタルハライドランプ及び照明装置 |
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US7679290B2 (en) | 2010-03-16 |
JPWO2004112086A1 (ja) | 2006-07-20 |
CN1802725A (zh) | 2006-07-12 |
US20060082313A1 (en) | 2006-04-20 |
JP3778920B2 (ja) | 2006-05-24 |
CN1802725B (zh) | 2010-07-14 |
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