WO2005029535A1 - 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
- WO2005029535A1 WO2005029535A1 PCT/JP2004/013259 JP2004013259W WO2005029535A1 WO 2005029535 A1 WO2005029535 A1 WO 2005029535A1 JP 2004013259 W JP2004013259 W JP 2004013259W WO 2005029535 A1 WO2005029535 A1 WO 2005029535A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tube
- metal halide
- alumina
- halide lamp
- crystal grain
- Prior art date
Links
Classifications
-
- 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
-
- 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
- H01J61/302—Vessels; Containers characterised by the material of the vessel
Definitions
- the present invention relates to a metal halide lamp. Background art
- metal halide lamps are widely used mainly for indoor interior lighting in commercial spaces such as stores.
- quartz was mainly used as the material for the arc tube of metal halide lamps, but in recent years, ceramics have been mainly used instead of quartz.
- a quartz tube has a heat resistant temperature of about 100 ° C, but a ceramic tube has a heat resistant temperature of about 1200 ° C or more. It is known that it is possible to apply a higher tube wall load and to realize a metal halide lamp with high efficiency and high color rendering.
- the Ceramic materials polycrystalline alumina Ceramic (A 1 2 0 3) (hereinafter referred to as "alumina”.) Has been mainly used, alumina, the total transmittance of 90% This is high, and is advantageous in terms of lamp efficiency.
- Japanese Patent Application Laid-Open Publication No. 2002-5336678 proposes to use an elongated arc tube.
- the main reason why this arc tube can obtain high efficiency is that the longer the arc tube is, the longer the distance between the electrodes is, the more the number of collisions between the electrons and the luminescent metal increases, and the more the emission spectrum becomes. Also, it is conceivable that the thinner the arc tube, the more the self-absorption by the luminous metal is suppressed, and the more efficient the luminous spectrum is radiated to the outside of the arc tube.
- the distance between the inner wall of the arc tube and the arc is short, and the arc tube becomes hot.
- the heat cycle is repeated until it cools down to room temperature.
- the thermal shock increases.
- the shape of the arc tube is made thinner for this purpose, cracks occur due to the above-mentioned excessive thermal shock, and a new problem arises in that the lamp life is shortened.
- the present invention has been made in view of the above-described problems, and has been developed to provide a metal halide lamp having high efficiency and a long life, which is free from cracks due to thermal shock due to the on / off cycle of the lamp. It is intended to provide.
- the present invention provides a book comprising a pair of electrode guides each having an electrode at the tip and a polycrystalline alumina ceramic having a discharge space in which electrodes are disposed so as to face each other.
- a metal halide lamp including a light emitting tube having: a tube portion; and a pair of thin tube portions connected to the main tube portion, and through which an electrode introducing body is passed and sealed by a sealing material.
- the wall loading of the arc tube WL (W / cm 2), EL the distance between the electrodes (mm), the inner diameter of the main pipe portion D i (mm), the polycrystalline aluminum Naserami click the crystal grain size G ( urn), it satisfies 20 ⁇ WL ⁇ 50, EL / D i ⁇ 2.0, and 0.5 ⁇ G ⁇ 5.0.
- the term “tube wall load” refers to the arc discharge input per unit surface area of the inner wall of the main tube between the electrodes.
- the term “crystal grain size” refers to the average value of the crystal grain size of the polycrystalline alumina ceramic. A specific method for obtaining the value will be described later.
- the crystal grain size G (urn) of the polycrystalline alumina ceramic is 0.5
- ⁇ G ⁇ 1.5 is satisfied.
- i (mm) preferably satisfies 2.0 ⁇ D i ⁇ 10.0.
- the above-mentioned polycrystalline alumina ceramic is added with Mg ⁇ of not more than 200 ppm.
- the above-mentioned polycrystalline alumina ceramic preferably has a total transmittance of 94% or more.
- the crystal grain size of the polycrystalline alumina ceramic used for the material of the main pipe is adjusted to 5 or less, which is smaller than before, the main pipe has increased resistance to thermal shock. I have.
- the crystal grain size G [; am] of the polycrystalline alumina ceramic is set to 0.1.
- a polycrystalline alumina ceramic having low reactivity with the inclusion can be obtained.
- the luminous flux maintenance factor of the lamp can be maintained for a long time, so that a long-life metal halide lamp can be obtained.
- alumina powder to which Mg0 is added is fired at normal pressure (in a hydrogen atmosphere) or in a vacuum using, for example, a tungsten furnace, a polycrystalline alumina ceramic having a transmittance of 94% or more can be obtained. Can be. By using the polycrystalline alumina ceramic as the material of the main pipe, an efficient metal halide lamp can be obtained.
- FIG. 1 is a diagram showing an overall configuration of a metal halide lamp according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view showing a configuration of the arc tube according to the present embodiment.
- FIG. 3 is data showing the relationship between the amount of Mg 0 added and the luminous flux maintenance factor.
- Figure 4 is a data wall loading is shows the relationship between the crystal grain size and Futen probability when the 35 W Roh cm 2, FIG. 4 (1) when the can main tube inner diameter 2.
- Omm Fig. 4 (2) shows the case where the inner diameter of the main pipe is 3.5 mm
- Fig. 4 (3) shows the case where the inner diameter of the main pipe is 5.
- Omm and Fig. 4 (4) shows the case where the inner diameter of the main pipe is 7. Omm.
- Figure 5 is a data showing the relationship between the crystal grain size and Futen probability when the tube wall loading of 45 W / cm 2, Fig. 5 (1) when the can main tube inner diameter 2.
- Omm Fig. 5 (2) shows the case where the inner diameter of the main pipe is 3.5 mm
- Fig. 5 (3) shows the case where the inner diameter of the main pipe is 5.
- Omm and Fig. 5 (4) shows the case where the inner diameter of the main pipe is 7. Omm.
- 5 (5) is the data when the inner diameter of the main pipe is 10 Omm.
- FIG. 1 is a diagram showing a configuration of a metal halide lamp 10 according to the present embodiment, in which a part of an outer tube glass bulb 11 is cut away to show the internal structure of the lamp.
- the metal hail lamp 10 is made of glass pulp
- the arc tube 20 feeds electricity from the glass stem 13 Supported by Tem lines 14 and 15.
- the arc tube 20 is surrounded by a quartz shield tube 16 on the outer periphery of the side surface. If the arc tube 20 ruptures, the outer tube glass pulp 11 is damaged by the influence of the rupture. This is to prevent the situation. In addition, nitrogen is sealed in the outer bulb glass bulb 11 only by 46.5 kPa, which insulates between the stem wires 14 and 15 and so on, so that the inside of the outer bulb glass bulb 11 is sealed. This is to prevent discharge from occurring.
- the outer tube glass bulb 11 plays a role of keeping the arc tube 20 warm and preventing oxidation of the stem wire and the like.
- FIG. 2 is a cross-sectional view showing the configuration of the arc tube 20.
- the arc tube 2 ⁇ includes a main tube portion 22 having a discharge space therein, thin tube portions 32, 42 provided at both ends of the main tube portion 22, and electrode introduction members 31, 41.
- the main pipe portion 22 has a substantially cylindrical shape with an inner diameter of D i, and has a tapered shape near the opening.
- the thin tube portions 32, 42 are fitted to the main tube portion 22 at the joint portions 50, 60, respectively, and are hermetically fixed by shrink fitting.
- the electrode introduction body 31 is formed by electrically connecting the electrode part 33 and the power supply part 34.
- the electrode introduction body 41 is formed by electrically connecting the electrode part 43 and the power supply part 44.
- the electrode part 33 has a tungsten rod and a tungsten coil 25 wound around this tip.
- the electrode section 43 has the same configuration.
- the electrode guides 3 1 and 4 1 are connected to the narrow tube sections 3 2 and 4 3 such that the tips of the electrode sections 3 3 and 4 3 face each other at a predetermined distance EL in the discharge space of the main pipe section 2 2
- the thin tube section 3 2 and 4 2 are the electrode introduction body 3
- the airtight sealing is provided by the flits 36 and 46 which are poured into the thin tube portions 32 and 42 so as to cover the whole of the power supply portions 34 and 44 of 1, 41.
- the flits 36, 46 also play a role in preventing the power supply sections 34, 44 from being eroded by halogen when the lamp is turned on.
- a molybdenum coil 3 7 is attached to each tungsten rod of the electrodes 3 3 and 4 3 to prevent the luminescent metal sealed inside the discharge space from entering the inside of the thin tubes 3 2 and 4 2. , 47 are each wound.
- Main 2
- the light-emitting metal enclosed in the tube 2 penetrates into the thin tube portions 32, 42 and sinks deeply, the light-emitting metal does not easily return to the discharge space in the main tube portion 2, thereby causing the discharge space. In this case, the amount of the luminescent metal is reduced. Since the color temperature of the lamp changes when the amount of luminescent metal changes, this is suppressed by the molybdenum coils 37 and 47.
- a light-emitting metal, a buffer gas, and a rare gas for starting assistance are sealed inside the main pipe part 22.
- argon (A r) is sealed as a rare gas for starting aid, as a luminescent metal iodide di Supuroshiumu (D yl 3), iodide tree um (T ml 3)
- HoI 3 holmium iodide
- T1I thallium iodide
- NaI sodium iodide
- the feeder section 34 derived from the thin tube sections 32 and 42 is connected to the stem wire 15 shown in FIG. 1, and the feeder section 44 is connected to the stem wire 14.
- the electrode introduction members 31 and 41 When a voltage is applied to the electrode introduction members 31 and 41, a discharge between the electrodes is induced by the rare gas for starting assistance. Due to this discharge, the temperature inside the main pipe part 22 rises, and the luminescent metal is vaporized. The vaporized luminescent metal is excited by collision with electrons to emit a luminescent spectrum. For example, in the case of a satellite, it emits an orange-yellow light-emitting spectrum having a wavelength of 589.0 nm or 589.6 nm, generally called a D-line. Each luminescent metal emits a unique emission spectrum, and the combination of these determines the luminous flux, color temperature, etc. of the lamp.
- the emission spectrum emitted from the luminescent metal has a property that it is easily absorbed by another luminescent metal of the same type. Radiated from luminescent metal This is because the light-emitting spectrum has enough and necessary energy to excite the same kind of light-emitting metal. This phenomenon is generally called self-absorption, and if self-absorption is large, the amount of luminous spectrum reaching the outside of the arc tube 20 is reduced, so that luminous efficiency is reduced.
- the luminescent spectrum be transmitted to the outside of the luminous tube 20 without colliding with the same kind of luminescent metal as much as possible.
- the emission spectrum is emitted when electrons emitted by arc discharge collide with the luminescent metal.Therefore, by increasing the number of collisions between the electrons and the luminescent metal, the luminous efficiency of the lamp is reduced. Will increase.
- an arc tube with high luminous efficiency can be obtained by making the shape of the main tube portion 22 elongated.
- the distance between the electrodes 31 and 41 is EL (mm) and the inner diameter of the main pipe section 22 is Di (mm)
- ELZD i ⁇ 2.0 when ELZD i ⁇ 2.0, a high-efficiency lamp is obtained. It has been confirmed that it can be obtained.
- the tube wall load WL (W / cm 2 ) applied to the arc tube is too small, a sufficient vapor pressure cannot be obtained, and the luminous efficiency will be low.
- the load must be set to at least 2 OWZcm 2 or more.
- the tube wall load must be set to 5 OW / cm 2 or less.
- the arc tube 20 that satisfies the above conditions has an elongated shape and the tube wall is closer to the arc than conventional arc tubes, so that the temperature of the main tube section 22 can be increased to a higher temperature. Become.
- a larger thermal shock is applied to the main tube part 22 than in the conventional arc tube, there is a problem that cracks are easily generated within the life time of the lamp.
- the inventors of the present application have repeatedly studied means for preventing such cracks, and focused on the thermal characteristics of alumina used as a material of the main pipe portion 22. The reason is that if the resistance of alumina itself to thermal shock increases, cracks can be prevented.
- the polycrystalline alumina ceramic is obtained by putting a slurry in which alumina powder, a binder and the like are prepared into a mold and firing at a predetermined temperature for a predetermined time.
- Alumina powder is white, but crystallizes by firing, and polycrystalline translucent alumina ceramics whose crystal axes are oriented in multiple directions are sintered.
- alumina polycrystalline alumina ceramic having a desired particle size
- alumina powder grows as a particle when fired. Therefore, for example, when producing alumina having a crystal grain size of 3 m, it is obtained by firing alumina powder having a grain size of about 0.5 m. It is.
- abnormal grain growth is more likely to occur as the particle size of the alumina powder is smaller.
- the crystal grain size of alumina used in conventional arc tubes was about 15 to 40 m, but this time, we want to obtain a smaller crystal grain size than before, so abnormal grain growth is likely to occur. Become. If abnormal grain growth occurs, it becomes impossible to adjust the crystal grain size to a desired size, so it is necessary to suppress abnormal grain growth during firing. The following two methods can be considered to suppress abnormal grain growth.
- HIP is a process in which isotropic pressure is simultaneously applied to an object to be processed and heat treatment is performed. Usually, baking is performed while applying isotropic pressure using a gas such as argon as a pressure medium.
- the heating coil is made of carbon for firing. So-called carbon furnaces are used.
- Mg was added to the alumina powder by the same HIP as before, and alumina with a crystal grain size of 5 ⁇ m was calcined. Then, the sintered alumina became brownish or yellowish and had low transmittance. Although the cause is unknown, the reduction in crystal grain size, firing under high pressure, the addition of Mg ⁇ ⁇ , the use of a carbon furnace despite the fact that carbon is easily impregnated into alumina, Alternatively, it is presumed that baking under conditions combining them and the like are the causes of the decrease in transmittance. In any case, brownish alumina is not suitable as a material for the arc tube because sufficient transmittance cannot be obtained.
- the present inventors have repeated trial and error on the firing method in order to obtain alumina having high transmittance.
- Mg 0 can be added to adjust the crystal grain size to 5 m or less, and it has translucency. It was found that alumina having a milky white color and a transmittance of 94% or more was obtained.
- M g O is unevenly distributed in the crystal grain boundaries in polycrystalline alumina, but as the crystal grain size of the alumina decreases, the crystal grain boundaries increase, thereby increasing the area where M g ⁇ contacts the inclusion. As they become larger, their reactivity also increases.
- M g O When M g O reacts with the inclusion, the rare earth iodide, which is the inclusion, and M g ⁇ are chemically bonded to form a new compound such as magnesium iodide, which changes the emission spectrum. Occurs. Although the cause is unknown, addition of MgO may cause blackening of the inner wall of the main pipe. Has been confirmed. It is considered that these factors were the main factors that reduced the luminous flux maintenance rate.
- FIG. 3 summarizes the results, and is data showing the relationship between the amount of Mg 0 added and the luminous flux maintenance factor.
- a lighting test a so-called life test was performed for 12000 hours, in which lighting for 5.5 hours and then turning off for 0.5 hour were repeated.
- the grain size G of alumina was adjusted to 1.5.
- the addition amount of Mg ⁇ was set to 200 ppm or less and sintering was performed in a tungsten furnace at normal pressure (hydrogen atmosphere) or vacuum, and the obtained alumina was used for the arc tube. It was found that a lamp with low reactivity and a high luminous flux maintenance ratio could be obtained. Also, by adding at least lppm of MgO, the crystal grain size can be adjusted to a small diameter, and alumina with high transmittance can be obtained.
- the crystal grain size Alumina having a size of 0.5 ⁇ m to 15.0 ⁇ m was produced.
- various types of arc tubes having an inner diameter Di of 2.Omm to 10.Omm were produced, and lighting tests were performed. Note that the size of the crystal grain size was determined by measuring the number of crystals existing per a predetermined length and calculating the average value by dividing the length by the number of crystals existing there. In the lighting test, the above-mentioned life test was performed for 18,000 hours.
- Fig. 4 and Fig. 5 show the results. (1) to (5) show the data when the inner diameter of the main pipe is 2. Omm to 10. Omm. Incidentally, FIG.
- Figure 5 is a data when the tube wall loading to 45W / cm 2.
- the “probability of missing” in the table refers to the probability that a crack has occurred. It is said that there is no problem as a product if the probability (survival rate) that no defects due to cracks occur in the rated life is 50% or more.
- the crystal grain size be in the range of 5 0 ⁇ M from 0. 5 m, the inner diameter D i purchase displacement of the main pipe section 22 It was confirmed that cracks did not occur even if the size was large. On the other hand, when the crystal grain size was 10.0 m and 15.0 ⁇ m, the probability of failure was 55% or more, and it was confirmed that the product could not be shipped.
- the crystal grain size be in the range of 1. 5 ⁇ m from 0. 5 ⁇ M, the inner diameter D i purchase displacement of the main pipe section 22 It was confirmed that cracks did not occur even if the size was large.
- the crystal grain size of alumina used in conventional wide arc tubes is about 15 m to 40 m, and as shown in Figs. 4 and 5, when the crystal grain size is 15 m, If it is used for an arc tube having an inner diameter Di of 10 mm or less, the probability of failure becomes 65% or more, so the alumina cannot be used for products. Also, when the grain size was adjusted to 10 m, the probability of failure was 55% or more, confirming that the occurrence of cracks could not be reduced sufficiently.
- the crystal grain size is preferably adjusted to a smaller size.
- G (um) is preferably adjusted in the range of 0.5 G ⁇ 5.0.
- a prototype lamp was fabricated using calcined alumina (total transmittance 94.5%, linear transmittance 8%, crystal grain size 1.5 m, Mg 0 added 200 ppm), and other lamps were manufactured. Characteristics were also measured.
- the total length of the arc tube is 80 mm
- the electrode length is 3. Omm
- the distance between the electrodes EL is 40.
- the inner diameter D i of the main tube section 22 is 4.
- the luminous flux maintenance rate after the rated life of 9000 hours of lighting was 88%, and no cracks occurred in the main pipe section 22.
- the lamp efficiency can be increased, and the cracks that can be generated in the arc tube can be suppressed.
- a long-life metal halide lamp can be provided.
- the present invention has been described based on the embodiments. However, it is needless to say that the contents of the present invention are not limited to the specific examples shown in the above embodiments. You can think.
- the crystal grain size of the alumina used for the main pipe section 22 is uniformly reduced over the entire region.
- the crystal grain size may be locally reduced. For example, if the inner diameter D i of the main pipe section 22 is set to 5 mm, the arc may be curved, and particularly the central portion is heated. In this case, the occurrence of cracks can be reduced by adjusting the crystal grain size to 5.0 ⁇ m or less only in the central portion of the main pipe portion 22 and in the vicinity thereof.
- the crystal grain size of the main tube portion 22 has been focused on, but the crystal grain size of alumina used for the material of the thin tube portions 32, 42 may be 5 ⁇ m or less. Thus, cracks that can be generated in the thin tube portions 32 and 42 due to thermal shock can be suppressed.
- the shape of the main pipe section 22 is described as being substantially cylindrical, but it may be a cylinder whose cross section perpendicular to the pipe axis is a circle having the same area on all cut surfaces.
- it may be an entasis-shaped cylinder in which a cross section perpendicular to the pipe axis becomes a circle having a larger area as approaching the center of the pipe.
- the main pipe 22 and the thin pipes 32, 42 are made of independent members, and the thin pipes 32, 42 are shrink-fitted to the main pipe 22.
- a configuration in which the main tube portion 22 and the thin tube portions 32 and 42 are integrally formed may be employed.
- the present invention has an effect that cracks hardly occur in the arc tube even when the arc tube has an elongated shape. It is possible to provide a metal halide lamp having a long life.
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- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04772941A EP1585168A4 (en) | 2003-09-22 | 2004-09-06 | METAL HALIDE LAMP |
JP2005514026A JPWO2005029535A1 (ja) | 2003-09-22 | 2004-09-06 | メタルハライドランプ |
US10/536,704 US20060145625A1 (en) | 2003-09-22 | 2004-09-06 | Metal halide lamp |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003330534 | 2003-09-22 | ||
JP2003-330534 | 2003-09-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005029535A1 true WO2005029535A1 (ja) | 2005-03-31 |
Family
ID=34372996
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/013259 WO2005029535A1 (ja) | 2003-09-22 | 2004-09-06 | メタルハライドランプ |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060145625A1 (ja) |
EP (1) | EP1585168A4 (ja) |
JP (1) | JPWO2005029535A1 (ja) |
CN (1) | CN100382228C (ja) |
WO (1) | WO2005029535A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009054333A (ja) * | 2007-08-24 | 2009-03-12 | Toshiba Lighting & Technology Corp | 高圧放電ランプ及び照明装置 |
JP2012009372A (ja) * | 2010-06-28 | 2012-01-12 | Stanley Electric Co Ltd | 紫外線放電ランプおよびその駆動方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04370649A (ja) * | 1991-06-19 | 1992-12-24 | Toto Ltd | 高輝度放電灯用発光管 |
JP2002293609A (ja) * | 2001-03-29 | 2002-10-09 | Ngk Insulators Ltd | セラミックス多結晶体及びその製造方法 |
JP2002536786A (ja) * | 1999-01-28 | 2002-10-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | メタルハライドランプ |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4169875A (en) * | 1977-03-11 | 1979-10-02 | General Electric Company | Method of producing a tubular body of polycrystalline alumina |
JPS5477481A (en) * | 1977-12-02 | 1979-06-20 | Ngk Insulators Ltd | Polycrystal transparent alumina light emitting tube and high voltage vapor discharge lamp using same |
WO1992002035A1 (fr) * | 1990-07-18 | 1992-02-06 | Toto Ltd. | Lampe a couleur variable |
US5742123A (en) * | 1992-07-09 | 1998-04-21 | Toto Ltd. | Sealing structure for light-emitting bulb assembly and method of manufacturing same |
CA2139839A1 (en) * | 1992-07-09 | 1994-01-20 | Hiroyuki Nagayama | Sealing structure for light-emitting bulb assembly and method of manufacturing same |
CA2308933C (en) * | 1999-05-19 | 2008-07-22 | Ngk Spark Plug Co., Ltd. | Translucent polycrystalline ceramic and method for making same |
JP2001064075A (ja) * | 1999-08-30 | 2001-03-13 | Sumitomo Chem Co Ltd | 透光性アルミナ焼結体およびその製造方法 |
JP2002075272A (ja) * | 2000-08-29 | 2002-03-15 | Matsushita Electric Ind Co Ltd | メタルハライドランプ |
-
2004
- 2004-09-06 WO PCT/JP2004/013259 patent/WO2005029535A1/ja not_active Application Discontinuation
- 2004-09-06 JP JP2005514026A patent/JPWO2005029535A1/ja active Pending
- 2004-09-06 US US10/536,704 patent/US20060145625A1/en not_active Abandoned
- 2004-09-06 CN CNB2004800017825A patent/CN100382228C/zh not_active Expired - Fee Related
- 2004-09-06 EP EP04772941A patent/EP1585168A4/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04370649A (ja) * | 1991-06-19 | 1992-12-24 | Toto Ltd | 高輝度放電灯用発光管 |
JP2002536786A (ja) * | 1999-01-28 | 2002-10-29 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | メタルハライドランプ |
JP2002293609A (ja) * | 2001-03-29 | 2002-10-09 | Ngk Insulators Ltd | セラミックス多結晶体及びその製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009054333A (ja) * | 2007-08-24 | 2009-03-12 | Toshiba Lighting & Technology Corp | 高圧放電ランプ及び照明装置 |
JP2012009372A (ja) * | 2010-06-28 | 2012-01-12 | Stanley Electric Co Ltd | 紫外線放電ランプおよびその駆動方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1585168A1 (en) | 2005-10-12 |
CN1723533A (zh) | 2006-01-18 |
CN100382228C (zh) | 2008-04-16 |
US20060145625A1 (en) | 2006-07-06 |
EP1585168A4 (en) | 2006-07-05 |
JPWO2005029535A1 (ja) | 2006-11-30 |
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