WO2003032363A1 - Lampe a decharge a haute tension, phare pour automobile et tube a arc pour ladite lampe a decharge a haute tension - Google Patents

Lampe a decharge a haute tension, phare pour automobile et tube a arc pour ladite lampe a decharge a haute tension Download PDF

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Publication number
WO2003032363A1
WO2003032363A1 PCT/JP2001/008674 JP0108674W WO03032363A1 WO 2003032363 A1 WO2003032363 A1 WO 2003032363A1 JP 0108674 W JP0108674 W JP 0108674W WO 03032363 A1 WO03032363 A1 WO 03032363A1
Authority
WO
WIPO (PCT)
Prior art keywords
arc tube
discharge lamp
light emitting
pressure discharge
section
Prior art date
Application number
PCT/JP2001/008674
Other languages
English (en)
Japanese (ja)
Inventor
Norikazu Niimi
Original Assignee
Ngk Insulators, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ngk Insulators, Ltd. filed Critical Ngk Insulators, Ltd.
Priority to PCT/JP2001/008674 priority Critical patent/WO2003032363A1/fr
Priority to US10/251,789 priority patent/US6791267B2/en
Priority to CNB021444811A priority patent/CN1224075C/zh
Priority to HU0203267A priority patent/HUP0203267A3/hu
Priority to EP02256815A priority patent/EP1310983B1/fr
Priority to DE60223988T priority patent/DE60223988T2/de
Publication of WO2003032363A1 publication Critical patent/WO2003032363A1/fr

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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
    • H01J61/30—Vessels; Containers

Definitions

  • the present invention relates to a high-pressure discharge lamp suitable for an automobile head lamp and the like.
  • High pressure discharge lamps using quartz discharge tubes have been widely used as automotive headlights because of their high brightness and high luminous efficiency.
  • a discharge lamp using such a quartz tube since the discharge tube is transparent, a light-emitting portion formed by a luminous gas in the discharge tube can be used as a point light source of the discharge lamp.
  • a discharge bulb is housed in a container for shielding ultraviolet rays, and light emitted from the discharge bulb is reflected by a reflector and projected. are doing.
  • the discharge lamp headlamp described in Japanese Patent Application Laid-Open No. 5-86684 discloses that a metal halide lamp and a high-pressure sodium lamp are used in combination as a light source for the headlamp.
  • Japanese Patent Application Laid-Open No. 2001-76667 a high-pressure discharge lamp that can be used as a pseudo-point light source of a headlamp for a vehicle.
  • a quartz arc tube when used, the luminous body is housed inside the luminous tube, and when the light is emitted, the luminous body inside can be seen from the outside of the transparent quartz luminous tube.
  • the illuminant functions as a point light source.
  • a high-pressure discharge lamp using an arc tube made of translucent polycrystalline alumina is translucent, so when viewed from the outside, the entire arc tube appears to be an integral luminous body .
  • the arc tube itself is made sufficiently small so that it can be used as a pseudo point light source.
  • the length of the arc tube is set to 6 to 15 mm, and the arc length in the discharge lamp is set to 1 to 6 mm. And, it discloses a structure that can realize a high-pressure discharge lamp using such a small arc tube. Disclosure of the invention
  • an arc tube is installed at a predetermined position, and light emitted from the arc tube is reflected by a reflector (reflection plate) and projected forward.
  • a reflector reflection plate
  • the three-dimensional positional relationship between the point light source and the reflector and the surface shape of the reflector are strictly determined in order to prevent a shift in the condensing position after the projection.
  • there are two lighting modes namely, a driving mode and a passing mode.
  • the driving mode the beam from the headlamp is collected and projected forward, and in the passing mode, the beam is projected diagonally downward.
  • the projection beam is focused by changing the positional relationship between the high-pressure discharge lamp and the reflector in accordance with different lighting modes. The position needs to be changed.
  • the positional relationship between the arc tube and the reflector is changed to correspond to different lighting modes, and the focusing position of the projection beam is changed. It has been found that it is practically difficult in design to change and focus the projected beam at each focusing position with high efficiency. That is, since the arc tube has a certain size, for example, when the arc tube and the reflector are almost perfectly aligned in the traveling mode and the focusing position is focused, the reflector moves in the passing mode. It is difficult by design to completely focus the projection beam on the focusing position when the light is focused. In order to solve this problem, it is effective to reduce the size of the arc tube. However, if the arc tube is further miniaturized, the production becomes difficult and the production cost may increase.
  • An object of the present invention is to facilitate a design that can improve the light collection efficiency of a projection beam at a focal point when a high-pressure discharge lamp is used as a pseudo point light source.
  • the present invention provides a light-emitting tube, which is made of translucent translucent ceramics, has a pair of openings and a light-emitting portion, and has an inner space filled with an ionized light-emitting substance and a starting gas.
  • a pair of discharge electrodes housed in the space, and a discharge electrode are attached, and an electrode holding material fixed to the opening of the arc tube is provided, and the light emitting portion has a thick portion and a thin portion. That the cross-sectional area of the thin section is 35% or more and 80% or less of the cross-sectional area of the thick section, and that the luminance center of the light emitting section exists in the thin section.
  • the present invention relates to a high-pressure discharge lamp.
  • the present invention relates to a head lamp for an automobile, comprising the high pressure discharge lamp as a pseudo point light source.
  • the present invention comprises a translucent translucent ceramic, has a pair of openings and a light emitting portion, and emits light for a high pressure discharge lamp in which an internal space is filled with an ionized light emitting substance and a starting gas.
  • a light emitting portion having a thick portion and a thin portion, wherein a cross-sectional area of a cross section of the thin portion is 35% or more and 80% or more of a cross-sectional area of the cross section of the thick portion.
  • the present invention relates to an arc tube characterized by the following.
  • the inventor has provided a thick portion and a thin portion in the light emitting tube in the light emitting portion, and set the cross-sectional area of the cross section of the thin portion to 35% or more and 80% or less of the cross-sectional area of the thick portion. By doing so, the inventors have conceived of arranging the luminance center of the light emitting portion in the thin portion.
  • the luminous body inside the luminous tube can be seen from the outside, and this luminous body functions as a point light source.
  • the position of the focal point of the projection beam after reflection by the reflector 1 can be determined by determining the position of the luminous body inside the quartz tube and the relative position of the reflector.
  • the present inventor unlike this method, presupposes an arc tube made of translucent translucent ceramics and uses the entire arc tube as a pseudo point light source.
  • the light flux from the thin portion is increased as compared with the light flux from the thick portion, and the thin portion is set as the luminance center.
  • the position and size of such a thin portion in the light emitting portion can be set relatively freely. Therefore, by appropriately setting the position and size of the thin portion of the arc tube, the position of the luminance center and the distribution of luminance in the arc tube can be appropriately set.
  • FIG. 1 is a longitudinal sectional view schematically showing a high-pressure discharge lamp 1A according to one embodiment of the present invention, in which a light-emitting portion 2b is provided with a thick portion 2g and one thin portion 2c. Have been.
  • FIG. 2 is a longitudinal sectional view showing a main part of the arc tube 2A of the high-pressure discharge lamp of FIG.
  • FIG. 3 is a longitudinal sectional view schematically showing a high-pressure discharge lamp 1B according to another embodiment of the present invention.
  • FIG. 4 is a longitudinal sectional view showing a main part of an arc tube 2B of the high-pressure discharge lamp of FIG.
  • FIG. 5 is a schematic diagram showing an automotive headlamp 15 using a quartz tube 18.
  • FIG. 6 is a schematic diagram showing an automotive headlamp 20 using the high-pressure discharge lamps 2A and 2B.
  • FIG. 7 is a longitudinal sectional view schematically showing a high-pressure discharge lamp 11 outside the present invention.
  • FIG. 8 is a longitudinal sectional view showing an enlarged view of a joint portion between an arc tube and an electrode holding member in a production example of the high-pressure discharge lamp of the present invention.
  • FIG. 1 is a longitudinal sectional view of a high-pressure discharge lamp 1A according to one embodiment of the present invention
  • FIG. 2 is a longitudinal sectional view showing a main part of an arc tube 2A.
  • the arc tube 2A includes a pair of openings 2a, and a light emitting section 2b sandwiched between the pair of openings 2a.
  • An electrode holding member 4 is inserted into and fixed to the inner opening of each opening 2a via a bonding material 3.
  • the inner space 6 of the arc tube 2A is filled with an ionized luminescent substance and a starting gas.
  • an inert gas such as argon ⁇ xenon and a metal halide are sealed in the inner space of the discharge tube, and mercury or zinc metal is further sealed as necessary.
  • the electrode holding member 4 includes a cylindrical portion 4c, a base 4b welded to an end of the cylindrical portion 4c, and an electrode holding portion 4a protruding inward from the base 4b.
  • the electrode holding portion 4a has a cylindrical shape in this example. Electrode holding An electrode 5 protrudes from the inner end of the part 4a, and a coil 5a is wound around the tip of the electrode 5. Although the coil 5a is provided at the tip of the electrode 5 in this example, the coil 5a is not always required.
  • the outer diameter of the arc tube 2A in the light emitting section 2b is substantially constant.
  • a concave portion 2d is provided on the inner peripheral surface 2f side of the arc tube 2A, and a thin portion 2c is provided corresponding to the concave portion 2d. In this example, one continuous thin portion 2c is provided in the light emitting portion 2b.
  • a discharge arc is generated between the pair of electrodes 5, and the ionized luminescent substance emits light.
  • a light flux is generated from the entire light emitting portion 2c of the arc tube.
  • the light transmittance of the thin portion 2c is higher than the light transmittance of the thick portion 2g, light is mainly emitted from the thin portion 2c.
  • a light portion 7 having a relatively large luminous flux is generated in the thin portion 2c of the light emitting portion 2b, and a dark portion 8 having a relatively small luminous flux is generated in the thick portion 2g.
  • the point 9 having the smallest thickness in the thin portion 2c is the luminance center. This luminance center extends in a ring shape along the outer periphery of the arc tube 1A.
  • the light-emitting portion 2b of the arc tube 2B of the high-pressure discharge lamp 1B is provided with two thin portions 2c, between the two thin portions 2c and outside each thin portion 2c. Each has a thick portion 2 g. Neither concave portions nor convex portions are provided on the outer peripheral surface 2e of the arc tube 2B, and the outer diameter of the arc tube 2B in the light emitting portion 2b is substantially constant. On the inner peripheral surface 2f side of the arc tube 2B, two concave portions 2d are provided, and a thin portion 2c is provided corresponding to each concave portion 2d.
  • each thin portion 2c When electric power is supplied to the high-pressure discharge lamp 1B, a luminous flux is generated from the entire light emitting portion 2b of the arc tube.
  • the light transmittance of each thin portion 2c is Since the light transmittance is higher than g, light is mainly emitted from each thin portion 2c.
  • the point 9 having the smallest thickness among the thin portions 2c is the luminance center.
  • Each brightness center 2d extends in a ring shape along the outer circumference of the arc tube 1A.
  • FIG. 5 is a schematic diagram showing an automotive headlamp 15 using a quartz tube 18.
  • the quartz tube 18 is housed in a container 19, and the container 19 is attached to a base 17 of a container 16 provided with a reflector.
  • a window 14 is attached to the front side of the lamp 15.
  • a light emitting body 22 is provided inside the quartz tube 18.
  • FIG. 6 is a schematic diagram showing an automotive headlamp 20 equipped with a high-pressure discharge lamp. 21 is an electrical connection means.
  • the quartz light emitting tube 18 since the quartz light emitting tube 18 is transparent, the light emitting body 22 only needs to have an outer diameter and a length that function as a point light source.
  • the entire light emitting portions of the arc tubes 2A and 2B since the entire light emitting portions of the arc tubes 2A and 2B emit light, the entire light emitting portion is turned into a pseudo point light source. Therefore, it is desirable that the outer diameter and the length of the light emitting portion 2b of the light emitting tubes 2A and 2B are substantially the same as the light emitting body 22 (FIG. 5).
  • the length L0 of the light emitting portion 2b of the arc tube be 15 mm or less and the diameter ⁇ 0 be 6 mm or less (see FIGS. 1 to 4).
  • the discharge arc length is 1 mn! About 5 mm is required.
  • the arc length of the inner space 6 of the arc tube can be 1 mm or more.
  • a part of the light emitting portion 2b is set as the luminance center 9, and the luminous flux is concentrated on the luminance center 9 and the vicinity thereof, so that the luminance center 9 is used as a point light source to generate a reflector and other projection beams.
  • Position and shape of the optical components can be designed. This facilitates a design that improves the light collection efficiency at the focal position of the projection beam as compared with the conventional case.
  • the following are examples of translucent translucent ceramics that constitute the arc tube.
  • translucent means the following light transmittance.
  • the material of the discharge electrode and the electrode holding material is not limited, a pure metal selected from the group consisting of tungsten, molybdenum, niobium, rhenium and tantalum is preferable, or the group consisting of tungsten, molybdenum, niobium, rhenium and tantalum.
  • An alloy of two or more selected metals is preferred.
  • tungsten, molybdenum, or a tungsten-molybdenum alloy is preferable.
  • a composite material of these pure metals or alloys and ceramics is preferable.
  • the thick portion refers to a portion having a relatively large thickness in the light emitting portion
  • the thin portion refers to a portion having a relatively small thickness in the light emitting portion
  • the cross-sectional area of the cross section of the thin portion is set to 35% or more and 80% or less of the cross-sectional area of the cross section of the thick portion. If this exceeds 80%, the difference in luminance between the thick part and the thin part is reduced, and the effect of the present invention cannot be obtained. From this viewpoint, it is more preferable that the cross-sectional area of the cross section of the thin portion be 70% or less of the cross-sectional area of the cross section of the thick portion. If the cross-sectional area of the thin section is less than 35% of the cross-sectional area of the thick section, cracks are likely to occur in the thin section during light emission, so the strength of the thin section is secured. From the viewpoint that it is necessary, it is necessary to set it to 35% or more. From this viewpoint, it is more preferable that the cross-sectional area of the thin section is 50% or more of the cross-sectional area of the thick section.
  • the cross-sectional area of the thin section 2 c is It is large near the thick part 2 g and becomes minimum at the luminance center (the thinnest part) 9.
  • the above-mentioned “cross-sectional area of the thin section” is defined as the minimum cross-sectional area of the thin section. Take a value.
  • the thickness of the thin portion 2c can be made substantially constant over the entire thin portion.
  • the cross-sectional area of the cross section of the thin portion is substantially constant over the entire length of the thin portion.
  • the wall thickness changes discontinuously at the boundary between the thick part and the thin part, it is considered that the arc tube is likely to crack near this boundary during lighting. . Therefore, it is preferable that the cross-sectional area of the cross section of the thin portion continuously changes from the boundary between the thick portion and the thin portion toward the luminance center.
  • the luminance center means a portion having the highest luminance in the light emitting section.
  • the luminance center does not have to be at one point, but may extend in the direction of the longitudinal section.
  • the luminous flux per unit area from the luminance center 9 is preferably 1.5 times or more, more preferably 2 times or more, the luminous flux per unit area from the dark part 8.
  • the outer diameter of the arc tube is substantially constant over the entire length of the light emitting section.
  • a thin portion is formed by providing a concave portion on the inner wall surface of the arc tube. The operation and effect of this will be described.
  • FIG. 7 is a longitudinal sectional view schematically showing a high-pressure discharge lamp 11 outside the present invention.
  • the arc tube 12 includes a light emitting portion 12b and a pair of openings 12a sandwiching the light emitting portion 12b.
  • the outer peripheral surface 1 2 of the arc tube 1 2 e No concave or convex part is provided on the inner peripheral surface 12 f. Therefore, the outer diameter and the inner diameter of the light emitting portion 12b of the arc tube 12 are substantially constant.
  • a discharge arc 10 is generated between the pair of electrodes 5.
  • the discharge arc 10 tends to swell slightly upward.
  • the temperature at the upper part of the arc tube 12 rises relatively as compared with the temperature at the lower part.
  • the upper part is cooled more rapidly than the lower part, and contracts, so that a tensile stress tends to be applied to the lower part.
  • Such tensile stress may cause cracking of the ceramic.
  • the arc tube is provided with one thin portion.
  • one concave portion 2d is provided. This recess 2 d faces the internal space 6 of the arc tube.
  • the shape of the space formed by the internal space 6 and the concave portion 2d is similar to the shape of the discharge arc 10, the local temperature rise of the arc tube is further suppressed.
  • the length m of the thin portion 2c is short, and specifically, it is preferable that the total length L0 of the light emitting portion 2b is 0.7 times or less. More preferably, it is 0.5 times or less. However, if the length m of the thin portion 2c is too small, the luminous flux from the thin portion is reduced, and the meaning of providing the thin portion is rather poor. Therefore, m is preferably 0.2 times or more of L 0.
  • the ratio T / t between the thickness T of the thick portion and the thickness t of the thin portion can be uniquely calculated from the ratio of the cross-sectional area of the cross section as described above.
  • the thickness T of the thick part is preferably 0.8 mm or more, and more preferably l.lm m or more, from the viewpoint of imparting strength to the arc tube to increase the life in long-term use. Also, when the thickness T of the thick portion increases, the luminous efficiency from the arc tube decreases. Therefore, from the viewpoint of increasing the luminous efficiency of the arc tube, the thickness T of the thick part is preferably 0.85 mm or less, more preferably 0.55 mm or less.
  • the thickness t of the thin portion is preferably 0.6 mm or more, and more preferably 0.9 mm or more, from the viewpoint of imparting strength to the arc tube to increase the life in long-term use. Also, when the thickness t of the thin portion increases, the luminous flux at the luminance center decreases. Therefore, from the viewpoint of the operation and effect of the present invention, the thickness t of the thin portion is preferably set to 0.7 mm or less, more preferably 0.4 mm or less.
  • the material of the bonding material 3 is not particularly limited, the following materials can be exemplified.
  • Ceramics selected from the group consisting of alumina, magnesia, yttria, lanthania, and zirconia, or a plurality of ceramics selected from the group consisting of alumina, magnesia, yttria, lanthania, and zirconia Mixture of ceramics
  • the cert examples of the ceramics constituting the cermet include one or more ceramics selected from the group consisting of aluminum, magnesia, yttria, lanthania, and zirconia, or a mixture thereof. it can.
  • the metal component of the cermet is preferably an alloy of tungsten, molybdenum, rhenium, or an alloy of two or more metals selected from the group consisting of tungsten, molybdenum, and rhenium.
  • the ratio of the ceramic component is preferably 55% by weight or more, more preferably 60% by weight or more (the ratio of the metal component is the balance).
  • the joining material 3 will be described with reference to FIG. This joining material is described in Japanese Patent Application Laid-Open No. 2001-76667.
  • glass is impregnated into a porous skeleton made of a sintered body of metal powder.
  • This sintered body has open pores.
  • Examples of the material of the metal powder include pure metals such as molybdenum, tungsten, rhenium, niobium, and tantalum, and alloys thereof.
  • Ceramic composition to be impregnated into the metal sintered body is selected from the group consisting of A 1 2 0 3, S i 0 2, Y 2 0 3, D y 2 ⁇ 3, B 2 0 3 and Mo_ ⁇ 3 is preferably configured by a material which, it is particularly preferable to contain the a 1 2 0 3. Particularly preferably, it has a composition of 60% by weight of dysprosium oxide, 15% by weight of alumina, and 25% by weight of silica.
  • an impregnated ceramic composition layer 3a and an interfacial ceramic composition layer 3b are generated.
  • the open pores of the metal sintered body are impregnated with the ceramic composition.
  • the interface ceramic composition layer 3b has the composition described above, and does not include a metal sintered body.
  • the high-pressure discharge lamp of the present invention is used for an automobile headlamp.
  • the embodiment used for the pump has been described.
  • the high-pressure discharge lamp of the present invention can be applied to other lighting devices to which a pseudo point light source can be applied, such as an OHP (overhead projector) and a liquid crystal projector.

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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne une lampe à décharge à haute tension (1A) qui comprend un tube à arc (2A) constitué de céramique semi-transparente, présentant une paire d'ouvertures (2a), une partie luminescente (2b) et un espace intérieur (6) rempli d'une substance luminescente d'ionisation et un gaz de démarrage; une paire d'électrodes de décharge (5) logées dans l'espace intérieur (6); et un élément (4) de support d'électrode auquel sont fixées les électrodes de décharge (5), et qui est fixé aux ouvertures (2a). Dans la partie luminescente (2b), le tube à arc (2A) est pourvu de parties épaisses (2g) et d'une partie fine (2c). La partie transversale de la partie fine (2c) présente une section équivalant à 35 % à 80 % de celle des parties épaisses (2g). La partie luminescente (2b) présente un centre de luminance (9) situé au niveau de la partie fine (2c).
PCT/JP2001/008674 2001-10-02 2001-10-02 Lampe a decharge a haute tension, phare pour automobile et tube a arc pour ladite lampe a decharge a haute tension WO2003032363A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
PCT/JP2001/008674 WO2003032363A1 (fr) 2001-10-02 2001-10-02 Lampe a decharge a haute tension, phare pour automobile et tube a arc pour ladite lampe a decharge a haute tension
US10/251,789 US6791267B2 (en) 2001-10-02 2002-09-23 High pressure discharge lamps, lighting systems, head lamps for automobiles and light emitting vessels for high pressure discharge lamps
CNB021444811A CN1224075C (zh) 2001-10-02 2002-09-30 高压放电灯、照明装置、汽车前灯及高压放电灯用发光管
HU0203267A HUP0203267A3 (en) 2001-10-02 2002-10-01 Head lamps for automobils and high pressure discharge lamps
EP02256815A EP1310983B1 (fr) 2001-10-02 2002-10-01 Ampoules émettrices de lumière pour lampes à décharge à haute pression, lampes à décharge à haute pression, systèmes d'éclairage et projecteur pour véhicule automobile
DE60223988T DE60223988T2 (de) 2001-10-02 2002-10-01 Lichtemittierende Gefässe für Hochdruckentladungslampen, Hochdruckentladungslampen, Beleuchtungssysteme und Kraftfahrzeugscheinwerfer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/008674 WO2003032363A1 (fr) 2001-10-02 2001-10-02 Lampe a decharge a haute tension, phare pour automobile et tube a arc pour ladite lampe a decharge a haute tension

Publications (1)

Publication Number Publication Date
WO2003032363A1 true WO2003032363A1 (fr) 2003-04-17

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PCT/JP2001/008674 WO2003032363A1 (fr) 2001-10-02 2001-10-02 Lampe a decharge a haute tension, phare pour automobile et tube a arc pour ladite lampe a decharge a haute tension

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7121682B2 (en) * 2002-10-09 2006-10-17 Lite-On Technology Corporation Scanning device

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5252886A (en) * 1991-04-16 1993-10-12 U.S. Philips Corporation High-pressure discharge lamp with ceramic vessel
JPH0620649A (ja) * 1992-07-03 1994-01-28 Toto Ltd 金属蒸気放電灯の透光性バルブ及びその製造方法
US5438343A (en) * 1992-07-28 1995-08-01 Philips Electronics North America Corporation Gas discharge displays and methodology for fabricating same by micromachining technology
JPH10334852A (ja) * 1997-05-30 1998-12-18 Iwasaki Electric Co Ltd メタルハライドランプ
JPH11149902A (ja) * 1997-11-14 1999-06-02 Matsushita Electric Works Ltd 金属蒸気放電灯
JPH11329353A (ja) * 1998-05-14 1999-11-30 Ngk Insulators Ltd 発光容器及びその製造方法
JP2000268774A (ja) * 1999-03-17 2000-09-29 Ngk Insulators Ltd 高圧放電灯
JP2001256919A (ja) * 1999-12-23 2001-09-21 General Electric Co <Ge> 単端式セラミックアーク放電ランプ及び製造方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5252886A (en) * 1991-04-16 1993-10-12 U.S. Philips Corporation High-pressure discharge lamp with ceramic vessel
JPH0620649A (ja) * 1992-07-03 1994-01-28 Toto Ltd 金属蒸気放電灯の透光性バルブ及びその製造方法
US5438343A (en) * 1992-07-28 1995-08-01 Philips Electronics North America Corporation Gas discharge displays and methodology for fabricating same by micromachining technology
JPH10334852A (ja) * 1997-05-30 1998-12-18 Iwasaki Electric Co Ltd メタルハライドランプ
JPH11149902A (ja) * 1997-11-14 1999-06-02 Matsushita Electric Works Ltd 金属蒸気放電灯
JPH11329353A (ja) * 1998-05-14 1999-11-30 Ngk Insulators Ltd 発光容器及びその製造方法
JP2000268774A (ja) * 1999-03-17 2000-09-29 Ngk Insulators Ltd 高圧放電灯
JP2001256919A (ja) * 1999-12-23 2001-09-21 General Electric Co <Ge> 単端式セラミックアーク放電ランプ及び製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7121682B2 (en) * 2002-10-09 2006-10-17 Lite-On Technology Corporation Scanning device

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