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
  • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J61/00—Gas-discharge or vapour-discharge lamps
  • H01J61/02—Details
  • H01J61/04—Electrodes; Screens; Shields
  • H01J61/06—Main electrodes
  • H01J61/073—Main electrodes for high-pressure discharge 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

Definitions

• the present invention relates to a high-pressure discharge lamp provided with a discharge vessel made of translucent ceramics, and a lighting device using the same.
• the present inventors have previously developed a high-pressure discharge lamp provided with a translucent ceramics discharge container which is small but has a desired life and good luminous efficiency.
• the present invention was filed as Japanese Patent Application No. 10-1963222.
• a dilation in which both ends are constricted by a continuous curved surface.
• a translucent ceramics discharge vessel including a protruding portion and a small-diameter cylindrical portion arranged in communication with both ends of the protruding portion and having an inner diameter smaller than the protruding portion.
• This discharge vessel is extremely advantageous in the case of a small high-pressure discharge lamp, since it is formed integrally and has no optically and thermally discontinuous parts.
• the inclusions adhere to the tip of the electrode, the electron emission capability of the electrode is reduced, and it becomes difficult to start the device or to change from a glow discharge to an arc discharge. As a result, the spattering becomes intense, and the translucent ceramics discharge vessel is blackened by the spattering.
• a first object of the present invention is to provide a small high-pressure discharge lamp with a reliable start.
• a second object of the present invention is to provide a small high-pressure discharge lamp that can easily transition from glow discharge to arc discharge.
• a third object of the present invention is to provide a light-transmitting cell formed by sputtering.
• An object of the present invention is to provide a compact high-pressure discharge lamp that prevents blackening of a mixed discharge vessel.
• a fourth object of the present invention is to provide a lighting device using the small high-pressure discharge lamp.
• the first high-pressure discharge lamp of the present invention has a bulged portion whose both ends are constricted by a continuous curved surface, and an inner diameter smaller than that of the bulged portion which is disposed in communication with both ends of the bulged portion.
• a small-diameter cylindrical portion, and a translucent ceramics discharge vessel having an inner volume of 0.1 Ice or less; a sealing portion and a base portion at the tip of the sealing portion. It has an anti-halogenated part with its ends connected, and is inserted into the small-diameter cylindrical part of the translucent ceramics discharge vessel so that the halogen-resistant part is between the inner surface of the small-diameter cylindrical part.
• a power supply conductor forming a slight gap in
• Translucent Se la Mi click scan small diameter cylinder portion you and Serra between sealable portion of the electrode integrated type feeder conductors are sealed Mi click scan sealing co down Nono discharge vessel 0 ⁇ down De seals;
• a discharge medium containing a metal halide and sealed in a translucent ceramics discharge vessel A discharge medium containing a metal halide and sealed in a translucent ceramics discharge vessel.
• a "translucent ceramics discharge vessel” refers to a single crystal metal oxide, polycrystalline metal oxide, or polycrystalline non-oxide that has light transmission and heat resistance.
• the metal oxide of single crystal c which means a discharge vessel made of a material, is, for example, a sapphire.
• Polycrystalline metal oxides are, for example, translucent hermetic aluminum oxide, yttrium-aluminum mono-garnet (YAG) or yttrium. Oxide of uranium (YOX).
• the polycrystalline non-oxide is, for example, aluminum nitride (A1N). Note that the light transmittance only needs to have such a degree that light emitted by discharge is transmitted through the discharge vessel and led to the outside. That is, it may be transparent or light diffusing.
• the central bulge and the small-diameter cylindrical portions at both ends of the bulge be integrally formed from the beginning.
• the swelling portion is integrally formed into a shape in which both ends are narrowed by a continuous curved surface, and a pair of temporarily formed small-diameter cylindrical portions are fitted to both ends and fired. It can also form a translucent ceramics discharge vessel.
• the reason that the inner volume of the translucent ceramics discharge vessel is specified to be 0.1 lcc or less is that the present invention relates to a small high-pressure discharge lamp. It is.
• the inner volume of the translucent ceramics discharge vessel is determined by filling the discharge vessel with water, filling the inside thereof with water, and using the small-diameter cylindrical sections provided at both ends of the discharge vessel. With the open end closed, remove the discharge vessel from the water, measure the water inside, and measure. Power supply conductor
• the power supply conductor is provided in at least one small-diameter cylindrical portion of the translucent ceramics discharge vessel.
• the power supply conductor is provided with a sealing portion and a halogenated compound resistant portion.
• the “sealing portion” can be sealed in a translucent ceramics discharge vessel using a ceramics sealing compound described later. Any material may be used.
• the sealing portion is sealed via a ceramic tube between the small-diameter cylindrical portion of the discharge vessel and the sealing portion of the power supply conductor.
• niobium, tantalum, titanium, zirconium, norfnium and vanadium can be used for the sealing portion of the power supply conductor. It is not required that the sealing portion has permeability to hydrogen and oxygen. However, the above materials consequently have hydrogen and oxygen permeability.
• aluminum oxide is used for the discharge vessel, niobium and tantalum have an average coefficient of thermal expansion that is almost the same as aluminum oxide, and thus are suitable as sealing portions. It is. The difference between the average thermal kitchen knives is also small in the case of titania oxide and YAG.
• aluminum nitride is used for a translucent ceramics discharge vessel, sealing properties It is better to use zirconium for the part.
• Halogenated parts means corrosion caused by halogenated compounds and free halogens present in the translucent ceramics discharge vessel during operation of the high-pressure discharge lamp. A part consisting of a substance that is hardly affected or is not corroded at all.
• the “halogenation-resistant” portion is composed of, for example, tungsten, molybdenum, and the like. When configuring the electrode section such that the tip of the halogenated compound protrudes into the translucent ceramics discharge vessel, the halogenated compound has the best heat resistance. One tungsten is the most suitable.
• the high-pressure discharge lamp of the present invention can be turned on by either AC or DC.
• a separately formed anode may be connected to the tip of the anti-halogenated portion of the power supply conductor.
• the electrode is located at the tip of the halogen-resistant part of the power supply conductor. You.
• the distance dl between the tip of the electrode and the inner surface of the bulging portion of the translucent ceramics discharge vessel at a plane perpendicular to the axis of the electrode including the tip is 1. It is specified to O mm or more. Note that the distance d1 is an average of the distances over the entire circumference of the electrode axis, since the electrode may be arranged slightly inclined with respect to the axis of the translucent ceramics discharge vessel. Let the value be the distance d1.
• the electrode is formed integrally with the power supply conductor by protruding the tip of the anti-halogenated portion of the power supply conductor into the bulging portion of the translucent ceramics discharge vessel. can do.
• the halogenated portion of the power supply conductor can be formed with a tungsten rod.
• the power supply conductor and the electrode can be separately formed, and the electrode can be connected to the tip of the anti-halogenated portion of the power supply conductor.
• the ceramic sealing compound seal is provided between the end surface of the small-diameter cylindrical portion of the discharge vessel and the sealing portion of the power supply conductor. While the small-diameter cylindrical part of the discharge vessel is being melted by heating, The compound for sealing the glass is allowed to penetrate between the small-diameter cylindrical portion and the sealing portion to hermetically seal the two.
• the power supply conductor is fixed at a predetermined position by this seal.
• the sealing portion inserted into the small-diameter cylindrical portion is completely covered with the above-mentioned ceramic sealing compound. Furthermore, if a part of the base end of the anti-halogenated part connected to the sealing part is covered with the above-mentioned ceramic sealing compound, the sealing is achieved. Sex parts are less likely to be corroded by halogenated compounds.
• the discharge medium contains a metal halide.
• the metal contains at least a luminescent metal.
• halogen that constitutes the metal halide any one or more of iodine, bromine, chlorine, and fluorine can be used.
• the metal halide is arbitrarily selected from known metal halides in order to obtain desired luminescence characteristics with respect to the emission color, the average color rendering index Ra and the luminous efficiency. Furthermore, it is arbitrarily selected according to the size and input power of the translucent ceramics discharge vessel. For example, one or more halogens selected from sodium Na, lithium Li, scandium Sc, and a rare earth metal drop Compounds can be used.
• a suitable amount of mercury can be sealed as a buffer medium.
• the vapor pressure is relatively high and luminescence in the visible light region is achieved. It is possible to enclose a metal that has little or no light emission, for example, a halogenated compound such as aluminum.
• Argon, xenon, neon, etc. can be used as the noble gas.
• the rated power consumption of the high-pressure discharge lamp of the present invention is suitably 35 W or less. In order to achieve further miniaturization, the rated power consumption is preferably 20 W or less.
• the high-pressure discharge lamp of the present invention by employing the above-described configuration, a sufficient space can be secured around the tip of the electrode.
• a sufficient space can be secured around the tip of the electrode.
• the second high-pressure discharge lamp according to the present invention in the first high-pressure discharge lamp, is perpendicular to the tip of the electrode and the axis of the translucent ceramic discharge vessel including the tip. Translucent cell in the plane The distance dl from the inner surface of the box discharge vessel is 0.12 mm or more.
• the second high-pressure discharge lamp has a more favorable effect than the first high-pressure discharge lamp.
• the third high-pressure discharge lamp of the present invention is:
• a translucent ceramics discharge vessel having an inner volume of 0.1 Ice or less;
• a pair of electrodes disposed at the tip of the anti-halogenated portion and having the tip protruding at least 1.2 mm in the bulging portion of the translucent ceramics discharge vessel;
• the protruding length of the electrode tip into the bulging portion is measured as follows. That is, first the translucent ceramic
• the lengths of the bulge and the small-diameter tube of the box discharge vessel are specified as follows.
• the length of the swelling portion is determined by drawing straight lines in contact with the inner surfaces of the small-diameter cylindrical portions at both ends from the center of the inner surface of the swelling portion.
• the distance between the intersections with the axis of is defined as the length of the bulging portion. Therefore, the length of the small-diameter tube is obtained by measuring the dimension from the center of the bulge to the end face of the small-diameter tube, and subtracting half of the length of the bulge from this dimension. Value.
• the protruding length of the tip of the electrode is the distance from the end of the bulging portion to the tip of the electrode.
• the protruding length of the electrode into the bulging portion of the translucent ceramics discharge vessel, it is possible to suppress the occurrence of turbulence around the electrode when the light is turned off. You.
• defining the protruding length as described above a sufficient space around the electrodes can be ensured, so that turbulence at the time of turning off the light can be prevented. Even so, the degree can be significantly reduced.
• the inclusions are less likely to adhere to the tip of the electrode, and the starting characteristics can be improved.
• the fourth high-pressure discharge lamp of the present invention is:
• a translucent cell with an inner volume of 0.1 cc or less
• a mixing vessel and a discharge vessel
• the protruding length of the electrode tip into the bulging portion, and the distance between the electrode tip and the inner surface of the discharge vessel in a plane perpendicular to the axis of the translucent ceramics discharge vessel are described.
• a space around the electrode is secured.
• the translucent ceramics discharge container according to any one of the first to third high-pressure discharge lamps has an inner volume of 0.0. Less than 5 cc are doing.
• the present invention can obtain a more remarkable effect in a small-sized high-pressure discharge lamp having an inner volume of a translucent ceramics discharge vessel of 0.05 to 5 cc or less. Note that the above internal volume can be set to not more than 0.04 cc. 'It is effective to set the rated lamp power of the high-pressure discharge lamp to 20 W or less.
• the lighting device of the present invention is characterized by comprising: a lighting device main body; and any one of the first to fifth high-pressure discharge lamps supported by the lighting device main body.
• the illuminating device is a concept including any device that uses the light emitted from the high-pressure discharge lamp for any purpose.
• the illuminating device, the headlight for a moving object, and the It can be applied to fiber optic light sources, image projection devices, photochemical devices, fingerprint discrimination devices, etc.
• the lighting device body refers to the remaining portion of the lighting device excluding the high-pressure discharge lamp.
• the “bulb-type high-pressure discharge lamp” is a lamp-type fluorescent lamp that integrally includes a high-pressure discharge lamp, a discharge lamp lighting device, and a power receiving unit such as a base. Use a lighting device that can be turned on simply by bonding it to a lamp socket for incandescent light bulbs like a lamp.
• the present invention uses a small high-pressure discharge lamp that has a small light-emitting portion and is easy to control light. It is preferable to provide a reflector integrally.
• FIG. 1 is a sectional view showing a first embodiment of the high-pressure discharge lamp of the present invention.
• FIG. 2 is an enlarged cross-sectional view of a main part showing a measurement standard for dimensions of each part of the translucent ceramics discharge vessel.
• FIG. 3 is a sectional view showing a second embodiment of the high-pressure discharge lamp of the present invention.
• FIG. 4 is a sectional view showing a third embodiment of the high-pressure discharge lamp of the present invention.
• FIG. 5 is a front view at the center in section showing a bulb-type high-pressure discharge lamp as one embodiment of the lighting device of the present invention.
• FIG. 1 A first embodiment of the high-pressure discharge lamp of the present invention will be described with reference to FIG. 1 and FIG.
• 1 is a translucent ceramics discharge container
• 2 is a power supply conductor
• 3 is an electrode
• 4 is a seal.
• the translucent ceramics discharge vessel 1 has a bulging portion 1a and small-diameter cylindrical portions 1b, 1b.
• the bulging portion 1a has both ends continuously narrowed by a curved surface, and has a hollow substantially elliptical spherical shape.
• the small-diameter cylindrical portion 1b is connected by a curved surface that is continuous with the bulging portion 1a, and forms the translucent ceramics discharge vessel 2 by integral molding.
• the length r L of the bulging portion 1 a is defined by the straight lines s 1 and s 2 tangent to the bulging portion 1 a and the inner surface of the small-diameter cylindrical portion 1 b from the central inner surface of the bulging portion 1 a in the left-right direction in the figure. In this case, the distance between the intersections P 1 and P 2 of the straight lines s 1 and s 2 and the diameter axis c is assumed.
• the length of the small-diameter cylindrical portion 1b on the left side is the end of the length rL of the bulging portion 1a, that is, the intersection point P1, and the end face of the small-diameter cylindrical portion 1b on the left side (second It is omitted in the figure.)
• the distance between the question and is 1 T 1.
• the length of the right small-diameter cylindrical portion 1b in the figure is a distance 1T2 between the intersection P2 and the end face of the right small-diameter cylindrical portion 1b.
• the total length 1L of the translucent ceramics discharge vessel can be obtained by the following equation.
• the power supply conductor 2 includes a sealing portion 2a and a halogen-resistant compound portion 2b.
• the sealing portion 2a functions to seal the translucent ceramics discharge vessel 1 between the power supply conductor 2 and the small-diameter cylindrical portion 1b.
• the antihalogenated portion 2b has its base end welded to the tip of the sealing portion 2a and its tip protruding into the bulging portion 1a: As shown in Fig. 2, a slight gap g is formed between the inner surface and the inner surface.
• Electrode 3 has a resistance to It is connected to the halogenated compound part 2 b and is formed integrally with the power supply conductor 2.
• this d 1 force is configured to be 1.0 mm or more.
• the protruding length d 2 of the electrode 3 from the bulging portion 1 a of the translucent ceramics discharge vessel 1 is d 2 force S i. 2 mm or more.
• the seal 4 is interposed between the small-diameter cylindrical portion 1b and the sealing portion 2a to hermetically seal the translucent ceramics discharge vessel 1 and to seal the power supply conductor 2 It is fixed in place. Then, to form the seal 4, a ceramic sealing connector. A wire is applied around the sealing portion 2 a of the power supply conductor 2, and is heated and melted to enter a gap between the sealing portion 2 a and the inner surface of the small-diameter cylindrical portion 1 b. Let it. Then, the entirety of the sealing portion 2a inserted into the small-diameter cylindrical portion 1b and covered with a ceramic sealing compound is further provided. The base end of the antihalogenated portion 2b is also covered.
• the high-pressure discharge lamp shown in Fig. 1 has the following specifications.
• the translucent ceramics discharge vessel is made of YAG and has a bulging part 1a. It has a length of 6 mm, a wall thickness of 0.5 mm, a small-diameter cylindrical part lb of 1.8 mm in outer diameter, and a total length of 35 mm.
• the sealing portion 2a is a niobium rod having an outer diameter of 0.64 mm
• the anti-nozzle genated portion 2b (and the electrode 3) is a tin rod having an outer diameter of 0.3 mm. It is.
• the discharge medium was Na 10.6 mg, Tl I 0.6 mg, In 10.4 mg, and mercury 5 mg, and the buffer gas used was Argon of about 20 kPa.
• the protruding length d 2 of the electrode into the bulging portion of the translucent ceramics discharge vessel was set to 2 mm, and the electrode tip and the inner surface of the translucent ceramics discharge vessel were contacted.
• 20 high-pressure discharge lamps were manufactured with the distance d 1 between the inside and outside of the range of the present invention varied, and a discharge lamp lighting circuit with an oscillation frequency of 60 kHz (no load secondary) Table 1 shows the results of a comparison of the start failure probability using a voltage of 4.5 kV).
• Distance d 1 mm Start failure probability (%)
• FIG. 3 is a sectional view showing a high-pressure discharge lamp according to a second embodiment of the present invention.
• the same parts as in Fig. 1 The same reference numerals are given and the description is omitted.
• FIG. 9 is a cross-sectional view illustrating a third embodiment of the high-pressure discharge lamp of the present invention.
• the same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof is omitted.
• the present embodiment is different from the first embodiment in that the high-pressure discharge lamp is not sealed in the outer bulb and is suitable for lighting.
• the sealing portion 2a of the power supply conductor is easily oxidized, and is configured not to be exposed to the air.
• a platinum rod 5 is welded to the end of the sealing part 2a to form the first seal 4, and then the part of the sealing part 2a exposed to the outside from the seal 4 is ceramic. Insert the tube 6 into the ceramic sealing connector. The end is applied to the end of the ceramic tube 5 and heated and melted to form a second seal 7.
• the sealing part 1a located outside the translucent ceramics discharge vessel 1 is formed by the ceramics tube 6 and the second seal 7. Since it is air-tightly covered, it is possible to light the lamp in the air without sealing the high-pressure discharge lamp in the outer tube in an air-tight manner.
• the length of the small-diameter cylindrical portion is different between 1b and 1b '.
• FIG. 5 is a front view in central section showing a bulb-shaped high-pressure discharge lamp as one embodiment of the lighting device of the present invention.
• the same parts as those in FIG. 4 are denoted by the same reference numerals, and description thereof is omitted.
• the bulb-type high-pressure discharge lamp of the present embodiment includes a high-pressure discharge lamp device 11, a discharge lamp lighting device 12, a power receiving means 13, and a case 14.
• the high-pressure discharge lamp device 11 includes a high-pressure discharge lamp 11a and a reflector 11b.
• the high-pressure discharge lamp 11a uses the high-pressure discharge lamp of the present invention, the one shown in FIG. 4 is particularly preferable. In this case, it is better to arrange the longer small-diameter cylindrical portion 1b toward the top of the reflecting mirror 11b.
• the reflecting mirror 11b has a light emitting opening 11b1, a reflecting surface 11b2, and a top opening 11b3. Then, the small-diameter cylindrical portion 1b on the top side is fixed with the inorganic adhesive 11c so that the bulging portion of the high-pressure discharge lamp 11a almost coincides with the focal point of the reflecting mirror 11b. It is fixed to the top opening 1 1 b 3 and supports the high-pressure discharge lamp 11 a. Light distribution because the small-diameter cylindrical part 1 b ′ of the translucent ceramics discharge vessel of the high-pressure discharge lamp does not project forward from the light-emitting opening 11 b 1 of the reflector 11 b. Is not disturbed.
• the discharge lamp lighting device 12 includes a high-frequency inverter and current limiting means, and lights the high-pressure discharge lamp 11a.
• the discharge lamp lighting device 12 is disposed behind the reflector 11 b of the high-pressure discharge lamp device 11. The heat generated by the lighting of the high-pressure discharge lamp 11a is blocked by the reflector 11b, so that the discharge lamp lighting device 12 operates stably.
• the power receiving means 13 is composed of a screw base. When the screw base is mounted on a lamp socket (not shown), power is received and discharged. Energize lamp lighting device 1 2.
• Case 14 accommodates the above components and holds them in a predetermined position, but has a streamlined shape, making it suitable for lighting equipment such as downlights. Rates are increasing.
• start-up is easy, the transition from a glow discharge to an arc discharge is easy, and the blackening of the translucent ceramics discharge container by sputtering is achieved. It is possible to provide a small high-pressure discharge lamp that is prevented.

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• Vessels And Coating Films For Discharge Lamps (AREA)
• Discharge Lamp (AREA)
• Discharge Lamps And Accessories Thereof (AREA)

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• 1998
  • 1998-07-24 JP JP21012098A patent/JP4297227B2/ja not_active Expired - Fee Related
• 1999
  • 1999-07-14 KR KR1020007002683A patent/KR100354851B1/ko not_active IP Right Cessation
  • 1999-07-14 WO PCT/JP1999/003797 patent/WO2000005746A1/ja active IP Right Grant
  • 1999-07-14 EP EP99929830A patent/EP1041603A4/en not_active Withdrawn

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