US20030184200A1 - Short-arch discharge lamp with reflection mirror - Google Patents

Short-arch discharge lamp with reflection mirror Download PDF

Info

Publication number
US20030184200A1
US20030184200A1 US10/344,557 US34455703A US2003184200A1 US 20030184200 A1 US20030184200 A1 US 20030184200A1 US 34455703 A US34455703 A US 34455703A US 2003184200 A1 US2003184200 A1 US 2003184200A1
Authority
US
United States
Prior art keywords
reflecting mirror
discharge lamp
base
insertion aperture
shaped portion
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US10/344,557
Other languages
English (en)
Inventor
Makoto Ookahara
Kyouichi Maseki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Iwasaki Electric Co Ltd
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to IWASAKI ELECTRIC CO., LTD. reassignment IWASAKI ELECTRIC CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MASEKI, KYOUICHI, OOKAHARA, MAKOTO
Publication of US20030184200A1 publication Critical patent/US20030184200A1/en
Priority to US11/312,432 priority Critical patent/US7644596B2/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/0005—Fastening of light sources or lamp holders of sources having contact pins, wires or blades, e.g. pinch sealed lamp
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/88—Lamps with discharge constricted by high pressure with discharge additionally constricted by envelope

Definitions

  • the present invention relates to a light source apparatus to be used as a back light of a liquid crystal projection apparatus, in particular to an improvement of a glass reflecting mirror.
  • a short arc discharge lamp has rapidly been spreading as a light source of a liquid crystal projector.
  • a kind of lamp is used as a light source apparatus constructed by combining with a reflecting mirror having a reflective surface formed on the internal surface of the reflecting mirror as a paraboloid of revolution or an ellipsoid of revolution for collecting light to a liquid crystal panel.
  • a light source apparatus is required to be more miniaturized and to have a higher efficiency as a light source apparatus for a mobile projector. Accordingly, various proposals for the downsizing of the light source apparatus and for utilizing the reflective surface of a reflecting mirror efficiently have been made.
  • a unit of an electric bulb and a reflector shown in Japanese Patent Laid-Open Publication No. Hei 6-203806 has been disclosed as one of the above-mentioned proposals
  • the reflector 31 of the unit forms a hollow neck-shaped portion 32 at the bottom portion of the reflector 31 at the time of working a glass reflecting mirror as shown in FIGS. 3 - 5 .
  • post-working for forming the electric bulb insertion aperture 33 is performed with a grindstone or the like after molding (FIG. 3).
  • the unit when the reflector 31 is used as a unit, the unit causes the problem in which the surface of the electric bulb insertion aperture, which is the end face of the hollow neck-shaped portion, cracks to be broken owing to the heat during the lighting of the electric bulb, since the surface is injured by the grindstone.
  • the unit in the case where an adhesive agent for fixing an electric bulb (cement) is filled in the hollow neck-shaped portion, the unit causes the problem in which the surface is more easily broken owing to the thermal stress caused by the difference of the coefficients of thermal expansion of the glass and the adhesive agent.
  • the reflector 31 and the electric bulb 41 are arranged so that the central axis of the reflector and the optical axis of the electric bulb agree with each other. Then, the adhesive agent 51 is filled into the inside of the hollow neck-shaped portion 32 to fix the reflector 31 and the electric bulb 41 . Thus, the unit is assembled.
  • a countermeasure of this problem is to separate the base 43 from the reflective surface 31 a of the reflector 31 on a large scale lest a cylinder portion 43 a of the base 43 should be contacted with a narrow portion 32 b on the reflective surface 31 a side of the tapered portion 32 a of the hollow neck-shaped portion 32 at the time of adjusting the optical axes of the bulb and the reflector. After that, the bulb and the reflector are fixed with the adhesive agent 51 .
  • a reference numeral 52 in the figure designates a ring-shaped glass member for preventing the outflow of the adhesive agent.
  • the present invention was made in view of the above description.
  • the invention can meet the miniaturization of an apparatus and the enhancement of the efficiency of optical characteristics, both being required as a light source apparatus for a mobile liquid crystal projector.
  • the invention aims to provide a short arc discharge lamp with a reflecting mirror which can prevent the generation of cracks from the end surface of the neck-shaped portion of the reflecting mirror owing to heat generation from the discharge lamp accompanied by the miniaturization, and which can adjust the positions of the reflecting mirror and the lamp even if the lamp deviates from the center axis of the electrode axis at the time of manufacturing the lamp, and further which has a long life and superior optical characteristics.
  • a short arc discharge lamp with a reflecting mirror includes: a glass reflecting mirror formed by molding, the reflecting mirror having a reflective surface formed in conformity with an even-order function on the inner surface of the reflecting mirror; and a short arc discharge lamp sealing a pair of electrodes therein, the discharge lamp having sealing portions formed on both ends thereof and a base fixed to one of the sealing portions; wherein: the discharge lamp is disposed so as to agree with the optical axis of the reflecting mirror; the base is fixed in an insertion aperture of a hollow neck-shaped portion formed at the center of the bottom portion of the reflecting mirror; the discharge lamp is characterized in that a part of said inner surface of said insertion aperture of said hollow neck-shaped portion near said base is worked into a cylindrical portion, the narrowest portion is formed from the cylindrical portion toward a reflective surface, and a portion continuing, while widening, from the narrowest portion toward said reflective surface is formed by a molding surface.
  • FIG. 1 is a sectional view of an embodiment according to the present invention.
  • FIG. 2 is an enlarged sectional view of the main part of the embodiment of FIG. 1.
  • FIG. 3 is an explanatory view showing a state of a conventional reflector after molding.
  • FIG. 4 is an explanatory view showing a post-working state of the conventional reflector.
  • FIG. 5 is a sectional view of the main part of the conventional unit of the reflector and an electric bulb.
  • FIGS. 1 and 2 are a sectional view and an enlarged sectional view of the main part, respectively, of a short arc discharge lamp according to the embodiment of the present invention.
  • a reference numeral 1 in the figures designates a reflecting mirror made of hard glass (the expansion coefficient thereof is 38 ⁇ 10 ⁇ 7 cm/° C.).
  • the reflecting mirror 1 has a reflective surface 1 a shaped in a paraboloid of revolution on its inner surface.
  • An aperture portion 2 is formed on one side of the reflecting mirror.
  • a neck-shaped portion 4 having an insertion aperture 3 is formed at the center of the bottom portion on the other side of the reflecting mirror.
  • a reference numeral 11 designates a short arc discharge lamp made of silica arc tube.
  • the discharge lamp 11 seals a pair of electrodes 12 a , 12 b along the optical axis of the discharge lamp 11 .
  • a luminous material such as mercury or the like is sealed in the discharge lamp 11 together with a starting gas.
  • arc tube sealing portions 14 a , 14 b in which molybdenum foils 13 a , 13 b are embedded, are formed on both ends of the luminous portion.
  • a base 15 with a screw is fixed on the sealing portion 14 b , one of the sealing portions 14 a , 14 b .
  • the base 15 is composed of a cylinder portion 15 a and a screw portion 15 b on the end of the cylinder portion 15 a.
  • the above-mentioned reflecting mirror 1 having a focal distance of 6 mm and the discharge lamp 11 are arranged so that the center axis of the reflecting mirror and the optical axis of the lamp agree with each other.
  • the base 15 with the screw fixed at the arc tube sealing portion 14 b of the discharge lamp 11 is inserted into the insertion aperture 3 formed in the neck-shaped portion 4 of the reflecting mirror 1 , and the base 15 is fixed with an adhesive agent 21 .
  • a portion (an inlet portion of the insertion aperture) which is continued with widening from the insertion aperture 3 of the neck-shaped portion 4 toward the reflecting surface is formed by a molding surface 4 a.
  • the molding surface 4 a keeps the surface when it was formed and it does not need a cutting working after press molding with a metal mold, it has not any scars quite at all to be a smooth surface.
  • the narrowest portion 4 b of the insertion aperture 3 is formed at a portion continuing to said molding surface 4 a for preventing the outflow of the adhesive agent 21 to the molding surface 4 a when the adhesive agent 21 is poured into the neck-shaped portion 4 after assembling.
  • the portion ranging from the narrowest portion 4 b of the insertion aperture 3 to the external end portion thereof is formed to be a cylinder 4 c .
  • the cylinder 4 c is formed to have a large diameter for enabling the insertion of the cylinder portion 15 a of the base 15 with the screw fixed to the arc tube sealing portion 14 b , which is to be inserted into the insertion aperture 3 of the neck-shaped portion 4 , with a sufficient margin, and for enabling the positional adjustment of the pair of the electrodes to agree with the center axis of the reflecting mirror with a sufficient margin in case of the axial deviation of the pair of the electrodes which may happen at the time of manufacturing the lamp.
  • the shape of the cross section of the cylindrical portion of the base to be inserted into the insertion aperture is a hexagon for making it difficult to turn around after fixing, similar effects can be obtained.
  • the reflecting mirror according to the present invention has no portion worked by cutting in the molding surface of the neck-shaped portion, and then the surface portion does not become a high temperature portion. Consequently, even if the glass having the same composition is used and the temperature of the molding surface becomes about 500° C. at the time of lighting, no cracks are produced during the life period of the lamp.
  • the reflecting mirror and the lamp are fixed to each other with an adhesive agent, the main components of which are silica and alumina, after their positional adjustment.
  • the adhesive agent is poured from a notched portion formed in the bottom portion of the neck-shaped portion 4 of the reflecting mirror as the inlet of the adhesive agent.
  • the adhesive agent does not flow into the moling surface 4 a and on the reflective surface 1 a .
  • the generation of cracks caused by a stress generated by the difference of thermal expansion of the glass reflecting mirror and the adhesive agent can be prevented.
  • a short arc discharge lamp with a reflecting mirror improves the structure and the shape of the neck-shaped portion at the bottom portion of the reflecting mirror, and does not perform cutting working of the surface near the luminous portion of the lamp being a heat generation source. Accordingly, the end surface of the lamp insertion aperture adjoining to the reflective surface is left to be an molding surface as it is, and the periphery portion of the insertion aperture enclosing the base with a screw of the lamp is formed to be a cylindrical portion having the same shape of the cylinder portion of the base. Then, by making the diameter to be sufficiently large, the adjustment of the optical axes of the reflecting mirror and the lamp can sufficiently be performed even if the lamps are dispersed in manufacturing.
  • the narrowest portion is a partition between the cylindrical portion and the molding surface of the insertion aperture, the adhesive agent does not flow into the reflective surface side during operations, and cracks are not produced even if the temperature of the lamp becomes high during its life. Consequently, a short arc discharge lamp with a reflecting mirror having superior optical efficiency can be obtained.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Projection Apparatus (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
US10/344,557 2000-08-17 2001-08-17 Short-arch discharge lamp with reflection mirror Abandoned US20030184200A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/312,432 US7644596B2 (en) 2000-08-17 2005-12-21 Method of manufacturing a glass reflector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000247253A JP2002062586A (ja) 2000-08-17 2000-08-17 反射鏡付きショートアーク放電ランプ
JP2000-247253 2000-08-17

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/312,432 Continuation-In-Part US7644596B2 (en) 2000-08-17 2005-12-21 Method of manufacturing a glass reflector

Publications (1)

Publication Number Publication Date
US20030184200A1 true US20030184200A1 (en) 2003-10-02

Family

ID=18737387

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/344,557 Abandoned US20030184200A1 (en) 2000-08-17 2001-08-17 Short-arch discharge lamp with reflection mirror
US11/312,432 Expired - Fee Related US7644596B2 (en) 2000-08-17 2005-12-21 Method of manufacturing a glass reflector

Family Applications After (1)

Application Number Title Priority Date Filing Date
US11/312,432 Expired - Fee Related US7644596B2 (en) 2000-08-17 2005-12-21 Method of manufacturing a glass reflector

Country Status (5)

Country Link
US (2) US20030184200A1 (https=)
EP (1) EP1312856B1 (https=)
JP (1) JP2002062586A (https=)
DE (1) DE60131419T2 (https=)
WO (1) WO2002014741A1 (https=)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050024879A1 (en) * 2002-08-30 2005-02-03 Takeshi Takezawa Illumination device, projector, and method of assembling illuminating device
US20060044810A1 (en) * 2003-06-26 2006-03-02 Asahi Techno Glass Corporation Glass reflector for projector and manufacturing method for the same
US20080027441A1 (en) * 2006-07-31 2008-01-31 Lopez Mandi J A soft tissue fixation device
US20080048563A1 (en) * 2004-03-22 2008-02-28 Seiko Epson Corporation Lamp device and projector equipped with the same

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002062586A (ja) 2000-08-17 2002-02-28 Iwasaki Electric Co Ltd 反射鏡付きショートアーク放電ランプ
US7001027B2 (en) * 2003-03-25 2006-02-21 Seiko Epson Corporation Light source device and projector
CN101387382B (zh) * 2003-05-22 2010-12-15 精工爱普生株式会社 光源装置及其制造方法和投影机
JP3988790B2 (ja) * 2003-05-22 2007-10-10 セイコーエプソン株式会社 光源装置、光源装置の製造方法、及びプロジェクタ
JP4190366B2 (ja) * 2003-08-04 2008-12-03 Ａｇｃテクノグラス株式会社 プロジェクター用ガラス製反射鏡の製造方法
JP4492337B2 (ja) * 2004-12-14 2010-06-30 ウシオ電機株式会社 光源ユニット
JP4539579B2 (ja) * 2006-02-14 2010-09-08 株式会社島津製作所 ランプ装置の光軸調整方法
CN102134898B (zh) * 2010-12-13 2012-04-18 德州振华装饰玻璃有限公司 空心玻璃砖圆柱弧形砖制造工艺
US8938991B2 (en) * 2011-10-04 2015-01-27 Rubbermaid Incorporated Method of making a molded glass article
WO2014050376A1 (ja) * 2012-09-25 2014-04-03 コニカミノルタ株式会社 ガラス部品の製造方法
US9004727B2 (en) * 2013-01-15 2015-04-14 Snap-On Incorporated Interchangeable reflectors for light devices
US10969560B2 (en) 2017-05-04 2021-04-06 Lightpath Technologies, Inc. Integrated optical assembly and manufacturing the same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5177396A (en) * 1990-12-19 1993-01-05 Gte Products Corporation Mirror with dichroic coating lamp housing
US5506464A (en) * 1992-10-30 1996-04-09 U.S. Philips Corporation Unit of electric lamp and reflector
US5548182A (en) * 1994-01-18 1996-08-20 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh Reflector lamp specifically adapted for combination with a reflector lamp-lamp luminaire or fixture
US6211616B1 (en) * 1997-11-18 2001-04-03 Matsushita Electronics Corporation High pressure discharge lamp, with tungsten electrode and lighting optical apparatus and image display system using the same
US6538383B1 (en) * 1998-10-13 2003-03-25 Matsushita Electric Industrial Co., Ltd. High-pressure mercury lamp

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3700881A (en) * 1971-04-29 1972-10-24 Gen Electric Lamp and reflector assembly
US3891421A (en) * 1973-01-02 1975-06-24 Gte Sylvania Inc Method of making a controlled-diffusion stippled reflector by sag molding
JPS5347253B2 (https=) * 1974-10-16 1978-12-20
US3985535A (en) * 1975-06-19 1976-10-12 Smithkline Corporation Method of making glass ampul for jet injector
JPS59181411A (ja) 1982-11-30 1984-10-15 住友電気工業株式会社 高電圧ケ−ブル
JP2788011B2 (ja) 1989-08-03 1998-08-20 三菱電機株式会社 半導体集積回路装置
DE3930527C1 (https=) 1989-09-13 1990-11-08 Grammer Ag, 8450 Amberg, De
JPH0366150U (https=) * 1989-10-30 1991-06-27
JPH03106615U (https=) * 1990-02-19 1991-11-05
JP3106615B2 (ja) 1991-11-18 2000-11-06 松下電器産業株式会社 給湯機などにおける燃焼装置
JP3456141B2 (ja) * 1998-03-18 2003-10-14 松下電器産業株式会社 反射鏡に高圧放電ランプを組み込む方法
CA2361528A1 (en) * 1999-12-02 2001-06-07 Matsushita Electric Industrial Co., Ltd. Discharge lamp and lamp device
JP2002062586A (ja) 2000-08-17 2002-02-28 Iwasaki Electric Co Ltd 反射鏡付きショートアーク放電ランプ

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5177396A (en) * 1990-12-19 1993-01-05 Gte Products Corporation Mirror with dichroic coating lamp housing
US5506464A (en) * 1992-10-30 1996-04-09 U.S. Philips Corporation Unit of electric lamp and reflector
US5548182A (en) * 1994-01-18 1996-08-20 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh Reflector lamp specifically adapted for combination with a reflector lamp-lamp luminaire or fixture
US6211616B1 (en) * 1997-11-18 2001-04-03 Matsushita Electronics Corporation High pressure discharge lamp, with tungsten electrode and lighting optical apparatus and image display system using the same
US6538383B1 (en) * 1998-10-13 2003-03-25 Matsushita Electric Industrial Co., Ltd. High-pressure mercury lamp

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050024879A1 (en) * 2002-08-30 2005-02-03 Takeshi Takezawa Illumination device, projector, and method of assembling illuminating device
US20070115439A1 (en) * 2002-08-30 2007-05-24 Seiko Epson Corporation Lighting system, projector, and method for assembling lighting system
US7232241B2 (en) * 2002-08-30 2007-06-19 Seiko Epson Corporation Illumination system, projector, and method for manufacturing illumination system
US7461954B2 (en) 2002-08-30 2008-12-09 Seiko Epson Corporation Lighting system, projector, and method for assembling lighting system
US20090080199A1 (en) * 2002-08-30 2009-03-26 Seiko Epson Corporation Lighting system, projector, and method for assembling lighting system
US20060044810A1 (en) * 2003-06-26 2006-03-02 Asahi Techno Glass Corporation Glass reflector for projector and manufacturing method for the same
US20080048563A1 (en) * 2004-03-22 2008-02-28 Seiko Epson Corporation Lamp device and projector equipped with the same
US7661830B2 (en) 2004-03-22 2010-02-16 Seiko Epson Corporation Lamp device and projector equipped with the same
US20080027441A1 (en) * 2006-07-31 2008-01-31 Lopez Mandi J A soft tissue fixation device

Also Published As

Publication number Publication date
EP1312856A1 (en) 2003-05-21
EP1312856A4 (en) 2006-03-08
WO2002014741A1 (en) 2002-02-21
US20060158079A1 (en) 2006-07-20
DE60131419T2 (de) 2008-09-18
DE60131419D1 (de) 2007-12-27
US7644596B2 (en) 2010-01-12
JP2002062586A (ja) 2002-02-28
EP1312856B1 (en) 2007-11-14

Similar Documents

Publication Publication Date Title
US20030184200A1 (en) Short-arch discharge lamp with reflection mirror
US7357537B2 (en) Light source for projector and projection type image display apparatus using thereof
JP3606149B2 (ja) 光源装置
JP2002062586A5 (https=)
JP5232007B2 (ja) 亀裂制御改良型高輝度放電ランプおよびその製造方法
US8247974B2 (en) High-pressure discharge lamp, lamp unit, and image display apparatus
KR20010110756A (ko) 전기 램프 반사기 유닛
JP5243837B2 (ja) 反射鏡付放電ランプ
JP4914505B2 (ja) シングルエンド型セラミック放電灯
JP2009500792A (ja) モリブデン−レニウム端部キャップを有するセラミックランプ、並びに該ランプを備えるシステム及び方法
EP1862729A1 (en) Light source device
CA2354428C (en) Illuminant for discharge lamp
KR101160595B1 (ko) 고압 가스 방전 램프
JP4492307B2 (ja) 光源装置
JP2008251391A (ja) 高圧放電ランプ
JP3591170B2 (ja) セラミックス放電ランプ、ランプ装置、点灯装置および液晶プロジェクタ
CN2371700Y (zh) 氦氖激光管
CN1758413B (zh) 光源装置
JP2000223023A (ja) 高圧放電ランプおよびそのランプの製造方法ならびにそのランプを用いたランプ器具，照明装置，投光装置，画像投影装置
RU2249276C2 (ru) Источник света для газоразрядной лампы
JP2006093045A (ja) 高圧放電ランプおよび照明装置
JP2002184233A (ja) 光源装置
US20090284153A1 (en) Ceramic discharge lamp with integral burner and reflector
JP4577187B2 (ja) 反射鏡付きランプ
JPH10149799A (ja) セラミックス放電ランプ、ランプ装置、点灯装置および液晶プロジェクタ

Legal Events

Date Code Title Description
AS Assignment

Owner name: IWASAKI ELECTRIC CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OOKAHARA, MAKOTO;MASEKI, KYOUICHI;REEL/FRAME:013953/0554

Effective date: 20030217

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION