JP2010027560A - External electrode type discharge lamp and electrode - Google Patents

External electrode type discharge lamp and electrode Download PDF

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Publication number
JP2010027560A
JP2010027560A JP2008190939A JP2008190939A JP2010027560A JP 2010027560 A JP2010027560 A JP 2010027560A JP 2008190939 A JP2008190939 A JP 2008190939A JP 2008190939 A JP2008190939 A JP 2008190939A JP 2010027560 A JP2010027560 A JP 2010027560A
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glass tube
external electrode
discharge lamp
electrode
type discharge
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Shin Tanaka
伸 田中
Toshikazu Sugimura
俊和 杉村
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Hotalux Ltd
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NEC Lighting Ltd
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Priority to JP2008190939A priority Critical patent/JP2010027560A/en
Priority to TW098122921A priority patent/TW201011809A/en
Priority to KR1020090067414A priority patent/KR20100011934A/en
Priority to CN200910160928A priority patent/CN101667523A/en
Publication of JP2010027560A publication Critical patent/JP2010027560A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
    • H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
    • H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
    • H01J65/046—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using capacitive means around the vessel
    • 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
    • H01J61/067—Main electrodes for low-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
    • H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/76—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only
    • H01J61/78—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a filling of permanent gas or gases only with cold cathode; with cathode heated only by discharge, e.g. high-tension lamp for advertising
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an external electrode type discharge lamp having an external electrode having a uniform outer diameter. <P>SOLUTION: This external electrode type discharge lamp is an external electrode type discharge lamp for soldering the electrode to an outer peripheral surface of an end part in the axial direction of a glass tube sealed with a discharge medium. The electrode is composed of a conductive plate material spirally wound on the outer peripheral surface of the glass tube, and mutual side surfaces of adjacent plate materials are mutually opposed in the axial direction of the glass tube. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、外部電極型放電ランプおよび電極に関するものである。   The present invention relates to an external electrode type discharge lamp and an electrode.

外部電極型放電ランプは、放電媒体が封入されたガラス管と、ガラス管の外周面上に設けられた電極（外部電極）とを有する。図２Ａ、図２Ｂに外部電極型放電ランプの一例を示す。図示されている外部電極型放電ランプでは、ガラス管２０の軸線方向両端の外周面上にそれぞれ外部電極２１が設けられている。ガラス管２０は、珪酸ガラスからなり、内部には放電媒体が封入されている。放電媒体には、キセノンと水銀蒸気との混合ガスや、キセノンと水銀蒸気との混合ガスにアルゴンガスやネオンガスなどの希ガスがさらに混合された混合ガスなどが用いられる。また、ガラス管２０内の圧力は、1.3×103〜4.0×103（10〜300Torr）程度に維持されている。一方、外部電極２１は、金属製の板材を円筒状に丸めたものであってガラス管２０の軸線方向両端の外周面に被せられている。さらに、ガラス管２０の内周面には、そのほぼ全域に亘って蛍光体（不図示）が塗布されている。外部電極２１に高電圧が印加されると、ガラス管２０内で放電が発生して紫外線が放出され、その紫外線によって蛍光体が励起されて可視光が放出される。 The external electrode type discharge lamp has a glass tube in which a discharge medium is sealed and an electrode (external electrode) provided on the outer peripheral surface of the glass tube. An example of an external electrode type discharge lamp is shown in FIGS. 2A and 2B. In the illustrated external electrode type discharge lamp, external electrodes 21 are provided on the outer peripheral surfaces of both ends of the glass tube 20 in the axial direction. The glass tube 20 is made of silicate glass, and a discharge medium is sealed inside. As the discharge medium, a mixed gas of xenon and mercury vapor, a mixed gas in which a rare gas such as argon gas or neon gas is further mixed with a mixed gas of xenon and mercury vapor, or the like is used. The pressure in the glass tube 20 is maintained to the extent 1.3 × 10 3 ~4.0 × 10 3 (10~300Torr). On the other hand, the external electrode 21 is formed by rolling a metal plate into a cylindrical shape and covers the outer peripheral surfaces of both ends in the axial direction of the glass tube 20. Furthermore, a phosphor (not shown) is applied to the inner peripheral surface of the glass tube 20 over almost the entire area. When a high voltage is applied to the external electrode 21, a discharge occurs in the glass tube 20 and ultraviolet rays are emitted, and the phosphor is excited by the ultraviolet rays and visible light is emitted.

上記構造を有する外部電極型放電ランプは次のようにして製造される。すなわち、放電媒体が封入されたガラス管２０の軸線方向端部を筒状の外部電極２１に内側に挿入する。ここで、外部電極２０の周方向両端部は互いに重なっているが固定はされていない。さらに、ガラス管２０が挿入される前の外部電極２１の内径はガラス管２０の外径と同一か、それよりも若干小さい。よって、ガラス管２０の端部を外部電極２１の内側に挿入すると、外部電極２１は周方向に弾性変形して拡径する。結果、外部電極２１は自己の弾性復元力によってガラス管２０の外周面に仮止めされる。なお、外部電極２１は、上記のように拡径した後も周方向両端部の重なり合いが維持されるように寸法が設定されている。その後、外部電極２１が仮止めされているガラス管２０の端部を半田槽に入れ、外部電極２１とガラス管２０とを半田２２によって固定する。なお、ガラス管２０の端部が挿入された後の外部電極２１の端部同士の重なり合いは約0.1mmである。
特開２００６−４０８５７号公報 The external electrode type discharge lamp having the above structure is manufactured as follows. That is, the axial end of the glass tube 20 in which the discharge medium is sealed is inserted into the cylindrical external electrode 21 inside. Here, both ends in the circumferential direction of the external electrode 20 overlap each other but are not fixed. Furthermore, the inner diameter of the external electrode 21 before the glass tube 20 is inserted is the same as or slightly smaller than the outer diameter of the glass tube 20. Therefore, when the end portion of the glass tube 20 is inserted inside the external electrode 21, the external electrode 21 is elastically deformed in the circumferential direction and expanded in diameter. As a result, the external electrode 21 is temporarily fixed to the outer peripheral surface of the glass tube 20 by its own elastic restoring force. Note that the dimensions of the external electrode 21 are set so that the overlapping of both ends in the circumferential direction is maintained even after the diameter is expanded as described above. Thereafter, the end portion of the glass tube 20 on which the external electrode 21 is temporarily fixed is placed in a solder bath, and the external electrode 21 and the glass tube 20 are fixed by the solder 22. Note that the overlap between the ends of the external electrode 21 after the end of the glass tube 20 is inserted is about 0.1 mm.
JP 2006-40857 A

上記のように、外部電極とガラス管とは半田漕内で半田付けされる。より具体的には、外部電極が仮止めされたガラス管端部を半田漕に入れると、半田が外部電極の内周面とガラス管の外周面との間の隙間に流入し、外部電極とガラス管とが半田付けされる。   As described above, the external electrode and the glass tube are soldered in the soldering iron. More specifically, when the end of the glass tube to which the external electrode is temporarily fixed is put into a soldering iron, the solder flows into the gap between the inner peripheral surface of the external electrode and the outer peripheral surface of the glass tube, The glass tube is soldered.

しかし、重なり合っている外部電極の周方向両端部間には半田が流入し難い。また、外部電極の周方向両端部間に半田が流入し難いため、外部電極の内周面とガラス管の外周面との間の隙間には、専ら外部電極の長手方向両端から半田が流入することになる。このため、外部電極の周方向両端部間や外部電極の内周面とガラス管の外周面との間に十分な量の半田を流入させるのに時間がかかる。   However, it is difficult for solder to flow between both ends in the circumferential direction of the overlapping external electrodes. In addition, since it is difficult for solder to flow between both end portions in the circumferential direction of the external electrode, solder flows only from both ends in the longitudinal direction of the external electrode into the gap between the inner peripheral surface of the external electrode and the outer peripheral surface of the glass tube. It will be. For this reason, it takes time to allow a sufficient amount of solder to flow between the circumferential ends of the external electrode or between the inner peripheral surface of the external electrode and the outer peripheral surface of the glass tube.

また、外部電極の一部が重なっているので、外部電極の外径が均一にならない。外部電極の外径が不均一であると、外部電極型放電ランプの組み付けにおいて余分な手間を生じさせることがある。例えば、外部電極型放電ランプを用いて液晶パネル用バックライトを製造する場合には、シャーシに設けられている一対の弾性片からなるクリップ状のコネクタによって外部電極を挟持する。このとき、弾性片の一方が外部電極の重複部分に圧接し、弾性片の他方が非重複部分に圧接することがないように、外部電極の向きに留意しながら外部電極型放電ランプをシャーシに組み込む必要がある。   In addition, since the external electrodes partially overlap, the outer diameter of the external electrodes is not uniform. If the outer diameter of the external electrode is not uniform, extra work may be caused in assembling the external electrode type discharge lamp. For example, when a backlight for a liquid crystal panel is manufactured using an external electrode type discharge lamp, the external electrode is sandwiched between clip-shaped connectors formed of a pair of elastic pieces provided in the chassis. At this time, the external electrode type discharge lamp is attached to the chassis while paying attention to the direction of the external electrode so that one of the elastic pieces is not pressed against the overlapping portion of the external electrode and the other elastic piece is not pressed against the non-overlapping portion. Must be included.

本発明の目的は、上記課題の少なくとも一つを解決することである。   An object of the present invention is to solve at least one of the above problems.

本発明の外部電極型放電ランプは、放電媒体が封入されたガラス管の軸線方向端部の外周面に電極が半田付けされた外部電極型放電ランプであって、電極は、ガラス管の外周面に螺旋状に巻き付けられた導電性を有する板材からなり、ガラス管の軸線方向に沿って隣り合う板材の側面同士が互いに対向している。   An external electrode type discharge lamp of the present invention is an external electrode type discharge lamp in which an electrode is soldered to an outer peripheral surface of an axial end portion of a glass tube in which a discharge medium is enclosed, and the electrode is an outer peripheral surface of the glass tube The side surface of the board | plate material which adjoins along the axial direction of a glass tube mutually opposes.

本発明の電極は、放電媒体が封入されたガラス管に被せられる筒状の電極であって、螺旋状に巻かれた導電性の板材からなり、周方向および軸線方向に弾性変形可能であって、ガラス管に被せられると、自己の弾性復元力によってガラス管の外周面に圧接する。   The electrode of the present invention is a cylindrical electrode that covers a glass tube in which a discharge medium is sealed, and is made of a conductive plate wound in a spiral shape, and is elastically deformable in the circumferential direction and the axial direction. When it is put on the glass tube, it is pressed against the outer peripheral surface of the glass tube by its own elastic restoring force.

本発明によれば、上記課題の少なくとも一つが解決される。   According to the present invention, at least one of the above problems is solved.

以下、本発明の外部電極型放電ランプの実施形態の一例について説明する。図１は、本実施形態に係る外部電極型放電ランプ１の軸線方向一端を模式的に示す拡大斜視図である。本実施形態に係る外部電極型放電ランプ１は、ガラス管２と、ガラス管２の軸線方向両端部の外周面上に設けられた一対の電極（外部電極３）とを有する。なお、図１では、一方の外部電極３のみが図示され、他方の外部電極の図示は省略されている。   Hereinafter, an example of an embodiment of the external electrode type discharge lamp of the present invention will be described. FIG. 1 is an enlarged perspective view schematically showing one axial end of the external electrode type discharge lamp 1 according to the present embodiment. The external electrode type discharge lamp 1 according to this embodiment includes a glass tube 2 and a pair of electrodes (external electrodes 3) provided on the outer peripheral surfaces of both end portions in the axial direction of the glass tube 2. In FIG. 1, only one external electrode 3 is shown, and the other external electrode is not shown.

ガラス管２は、珪酸ガラスからなり、気密に封止された内部空間３を有する。ガラス管２の内部空間４には、放電媒体としてキセノンガスと水銀蒸気とが封入され、1.3×103〜4.0×103（10〜300Torr）程度に減圧されている。また、ガラス管２の内周面のうち、外部電極３と重複している領域には酸化イットリウム膜などからなる保護層（不図示）が形成されている。さらに、ガラス管２の内周面のうち、保護層が形成されていない領域には蛍光体層５が形成されている。蛍光体層５を構成する蛍光体の種類は特に限定されず、放出すべき光の波長に応じて既知または新規の蛍光体を適宜選択することができる。 The glass tube 2 is made of silicate glass and has an internal space 3 that is hermetically sealed. The internal space 4 of the glass tube 2 is filled with xenon gas and mercury vapor as a discharge medium, and the pressure is reduced to about 1.3 × 10 3 to 4.0 × 10 3 (10 to 300 Torr). Further, a protective layer (not shown) made of an yttrium oxide film or the like is formed in a region overlapping with the external electrode 3 on the inner peripheral surface of the glass tube 2. Furthermore, the fluorescent substance layer 5 is formed in the area | region in which the protective layer is not formed among the internal peripheral surfaces of the glass tube 2. FIG. The kind of the phosphor constituting the phosphor layer 5 is not particularly limited, and a known or new phosphor can be appropriately selected according to the wavelength of light to be emitted.

外部電極３は、ガラス管２の軸線方向両端部の外周面に螺旋状に巻き付けられた導電性を有する帯状の板材（以下「帯状板材３ａ」）からなり、ガラス管２の外周面に半田６によって固定されている。具体的には、外部電極３の内周面（ガラス管２の外周面と対向している帯状板材３ａの裏面）がガラス管２の外周面に半田付けされている。また、ガラス管２の軸線方向に沿って隣り合う帯状板材３ａの側面５は互いに対向している。換言すれば、帯状板材３ａには重なりあった部分はない。なお、対向する側面５同士の間には隙間が存在していてもよいが、側面５同士が密接している方が望ましい。   The external electrode 3 is composed of a conductive belt-like plate material (hereinafter referred to as “strip-like plate material 3 a”) spirally wound around the outer peripheral surfaces of both ends in the axial direction of the glass tube 2. It is fixed by. Specifically, the inner peripheral surface of the external electrode 3 (the back surface of the strip-shaped plate member 3 a facing the outer peripheral surface of the glass tube 2) is soldered to the outer peripheral surface of the glass tube 2. Moreover, the side surfaces 5 of the strip-shaped plate materials 3a adjacent to each other along the axial direction of the glass tube 2 face each other. In other words, there is no overlapping portion in the strip-shaped plate material 3a. A gap may exist between the opposing side surfaces 5, but it is desirable that the side surfaces 5 be in close contact with each other.

次に、本実施形態に係る外部電極型放電ランプの製造工程のうち、外部電極３をガラス管２に装着する工程について説明する。   Next, a process of mounting the external electrode 3 on the glass tube 2 will be described in the manufacturing process of the external electrode type discharge lamp according to the present embodiment.

まず、外部電極３とガラス管２とを用意する。外部電極３は、螺旋状に巻かれた帯状板材３ａからなり、自己の形状を保持するに足りる剛性を有する。また、外部電極３は、ガラス管２の外径と同一か、それよりも若干小さな内径を有する。さらに、外部電極３は、上記剛性を有する一方で弾性を有し、周方向（螺旋の旋回方向）及び軸線方向に弾性変形可能である。ガラス管２は上記構造を有し、内部空間４には予め放電媒体が封入されている。   First, the external electrode 3 and the glass tube 2 are prepared. The external electrode 3 is composed of a strip-shaped plate member 3a wound in a spiral shape, and has sufficient rigidity to maintain its own shape. The external electrode 3 has an inner diameter that is the same as or slightly smaller than the outer diameter of the glass tube 2. Further, the external electrode 3 has elasticity while having the rigidity described above, and is elastically deformable in the circumferential direction (spiral turning direction) and the axial direction. The glass tube 2 has the above structure, and a discharge medium is sealed in the internal space 4 in advance.

次に、ガラス管２の軸線方向一方の端部を外部電極３の軸線方向一方の端部から他方の端部に向けて挿入する。以下の説明では、外部電極３の軸線方向両端のうち、ガラス管端部の挿入が開始される側の端部を「先端７ａ」、先端７ａと反対側の端部を「後端７ｂ」と呼んで区別する。もっとも、かかる区別は説明の便宜上の区別に過ぎない。当該工程では、ガラス管２の端面が外部電極３の後端７ｂに達する前の所定位置に到達した段階でガラス管２の挿入を停止させる。   Next, one end in the axial direction of the glass tube 2 is inserted from one end in the axial direction of the external electrode 3 toward the other end. In the following description, of both ends in the axial direction of the external electrode 3, the end on the side where the insertion of the glass tube end is started is referred to as “front end 7a”, and the end opposite to the front end 7a is referred to as “rear end 7b”. Call and distinguish. However, such a distinction is merely a distinction for convenience of explanation. In this process, the insertion of the glass tube 2 is stopped when the end surface of the glass tube 2 reaches a predetermined position before reaching the rear end 7b of the external electrode 3.

上記のようにガラス管端部を外部電極３に挿入すると、ガラス管２の外径と同一か、それよりも若干小さな内径を有する外部電極３は、その周方向（螺旋の旋回方向）及び軸線方向に弾性変形する。結果、外部電極３は、自己の弾性復元力によってガラス管端部の外周面に圧接し、仮止めされる。外部電極３が弾性変形すると、ガラス管２の軸線方向に隣接する外部電極３（帯状板材３ａ）の側面５は互いに密接して対向する。   When the end of the glass tube is inserted into the external electrode 3 as described above, the external electrode 3 having an inner diameter that is the same as or slightly smaller than the outer diameter of the glass tube 2 has its circumferential direction (spiral turning direction) and axis. Elastically deforms in the direction. As a result, the external electrode 3 is pressed against the outer peripheral surface of the end portion of the glass tube by its own elastic restoring force and temporarily fixed. When the external electrode 3 is elastically deformed, the side surfaces 5 of the external electrodes 3 (band-shaped plate materials 3a) adjacent to each other in the axial direction of the glass tube 2 are in close contact with each other.

次いで、外部電極３が仮止めされたガラス管端部を溶融した半田が収容されている半田槽に入れる。具体的には、外部電極３が仮止めされたガラス管２を外部電極３の後端７ｂが下になる向きで垂直に立てて保持して半田槽の上方まで搬送する。   Next, the end of the glass tube to which the external electrode 3 is temporarily fixed is placed in a solder tank in which molten solder is accommodated. Specifically, the glass tube 2 to which the external electrode 3 is temporarily fixed is vertically held with the rear end 7b of the external electrode 3 facing downward and conveyed to the upper part of the solder bath.

次いで、ガラス管２を軸線方向に降下させて、ガラス管端部およびそこに仮止めされている外部電極３を溶融した半田に浸ける。このとき、半田槽内の溶融半田には超音波振動を与えておくことが望ましい。   Next, the glass tube 2 is lowered in the axial direction, and the end portion of the glass tube and the external electrode 3 temporarily fixed thereto are immersed in the molten solder. At this time, it is desirable to apply ultrasonic vibration to the molten solder in the solder bath.

その後、さらにガラス管２を軸線方向に降下させ、外部電極３の後端７ｂを半田槽の底面または底面よりも上方に設けられている台に突き当てる。次いで、ガラス管２をさらに軸線方向に降下させる。すると、外部電極３の後端７ｂは半田槽の底面または台に突き当たっているので、ガラス管２の端部が外部電極３にさらに挿入され。その後、ガラス管端部の外部電極３への挿入長が所定長に達したらガラス管２の降下を停止させる。この間、溶融した半田が外部電極３（帯状板材３ａ）の対向している側面５の間から外部電極３の内周面（帯状板材３ａの背面）とガラス管２の外周面との間の隙間に流入する。また、外部電極３の先端７ａおよび後端７ｂからも上記隙間に溶融半田が流入する。   Thereafter, the glass tube 2 is further lowered in the axial direction, and the rear end 7b of the external electrode 3 is brought into contact with the bottom surface of the solder tank or a table provided above the bottom surface. Next, the glass tube 2 is further lowered in the axial direction. Then, since the rear end 7 b of the external electrode 3 is in contact with the bottom surface or the base of the solder bath, the end of the glass tube 2 is further inserted into the external electrode 3. Thereafter, when the insertion length of the end of the glass tube into the external electrode 3 reaches a predetermined length, the descent of the glass tube 2 is stopped. During this time, the melted solder has a gap between the side surface 5 of the external electrode 3 (band-shaped plate material 3a) and the inner peripheral surface of the external electrode 3 (the back surface of the band-shaped plate material 3a) and the outer peripheral surface of the glass tube 2. Flow into. Further, the molten solder also flows into the gap from the front end 7a and the rear end 7b of the external electrode 3.

次に、ガラス管２を軸線方向に上昇させて、ガラス管端部を半田槽から引き揚げる。その後、ガラス管２の上下を反転させて上記工程を繰り返し、ガラス管２の他方の端部にも外部電極３を半田付けする。以上のように外部電極３をガラス管２に半田付けすると、ガラス管２の端面も半田６に被覆される（図２Ａ参照）。   Next, the glass tube 2 is raised in the axial direction, and the end of the glass tube is lifted from the solder bath. After that, the glass tube 2 is turned upside down and the above process is repeated, and the external electrode 3 is soldered to the other end of the glass tube 2. When the external electrode 3 is soldered to the glass tube 2 as described above, the end surface of the glass tube 2 is also covered with the solder 6 (see FIG. 2A).

もっとも、予めガラス管２の両端部に外部電極３を仮止めしておいてもよい。この場合、ガラス管２の一方の端部に仮止めされている外部電極３を上記のようにして半田付けした後にガラス管２の上下を反転させ、他方の端部に仮止めされている外部電極３を同様にして半田付けする。   However, the external electrodes 3 may be temporarily fixed to both ends of the glass tube 2 in advance. In this case, the external electrode 3 temporarily fixed to one end of the glass tube 2 is soldered as described above, and then the glass tube 2 is turned upside down and temporarily fixed to the other end. The electrode 3 is soldered in the same manner.

外部電極３（帯状板材３ａ）の材料の一例としては、４２アロイ（ニッケルを４２％含む鉄合金）やコバール（ＫＯＶ）が挙げられる。また、外部電極３の防錆の観点からは、外部電極３（帯状板材３ａ）の表面に金属メッキを施すことが望ましい。メッキ材料としては、金、ニッケル、銅、錫、亜鉛、銀などが挙げられる。   Examples of the material of the external electrode 3 (strip-shaped plate material 3a) include 42 alloy (iron alloy containing 42% nickel) and Kovar (KOV). Further, from the viewpoint of rust prevention of the external electrode 3, it is desirable to perform metal plating on the surface of the external electrode 3 (strip-shaped plate material 3a). Examples of the plating material include gold, nickel, copper, tin, zinc, and silver.

本発明の外部電極型放電ランプの実施形態の一例を示す模式的斜視図である。It is a typical perspective view which shows an example of embodiment of the external electrode type discharge lamp of this invention. 図１Ａの外部電極型放電ランプのＸ-Ｘ断面を示す拡大断面図である。It is an expanded sectional view which shows the XX cross section of the external electrode type discharge lamp of FIG. 1A. 本発明の外部電極型放電ランプと関連する外部電極型放電ランプの一例を示す模式的斜視図である。It is a typical perspective view which shows an example of the external electrode type discharge lamp relevant to the external electrode type discharge lamp of this invention. 図２Ａの外部電極型放電ランプのＹ-Ｙ断面を示す拡大断面図である。It is an expanded sectional view which shows the YY cross section of the external electrode type discharge lamp of FIG. 2A.

符号の説明Explanation of symbols

１ 外部電極型放電ランプ
２ ガラス管
３ 外部電極
３ａ 帯状板材
４ 内部空間
５ 側面
６ 半田 DESCRIPTION OF SYMBOLS 1 External electrode type discharge lamp 2 Glass tube 3 External electrode 3a Strip plate material 4 Internal space 5 Side surface 6 Solder

Claims (5)

放電媒体が封入されたガラス管の軸線方向端部の外周面に電極が半田付けされた外部電極型放電ランプにおいて、
前記電極は、前記ガラス管の前記外周面に螺旋状に巻き付けられた導電性を有する板材からなり、前記ガラス管の軸線方向に沿って隣り合う前記板材の側面同士が互いに対向していることを特徴とする外部電極型放電ランプ。 In the external electrode type discharge lamp in which the electrode is soldered to the outer peripheral surface of the axial end portion of the glass tube in which the discharge medium is sealed,
The electrode is made of a conductive plate spirally wound around the outer peripheral surface of the glass tube, and the side surfaces of the plate materials adjacent to each other along the axial direction of the glass tube are opposed to each other. A featured external electrode type discharge lamp. 前記板材の前記側面同士が接していることを特徴とする請求項１に記載の外部電極型放電ランプ。   2. The external electrode type discharge lamp according to claim 1, wherein the side surfaces of the plate material are in contact with each other. 放電媒体が封入されたガラス管に被せられる筒状の電極であって、
螺旋状に巻かれた導電性の板材からなり、周方向および軸線方向に弾性変形可能であって、
前記ガラス管に被せられると、自己の弾性復元力によって前記ガラス管の外周面に圧接することを特徴とする電極。 A cylindrical electrode placed on a glass tube in which a discharge medium is enclosed,
It consists of a conductive plate wound in a spiral shape, can be elastically deformed in the circumferential direction and the axial direction,
An electrode characterized in that when it is put on the glass tube, it is pressed against the outer peripheral surface of the glass tube by its own elastic restoring force. 前記ガラス管に被せられると、前記ガラス管の軸線方向に沿って隣り合う前記板材の側面同士が互いに対向することを特徴とする請求項３記載の電極。   4. The electrode according to claim 3, wherein when the glass tube is covered, side surfaces of the plate members adjacent to each other along the axial direction of the glass tube face each other. 前記ガラス管に被せられると、前記ガラス管の軸線方向に沿って隣り合う前記板材の側面同士が互いに接した状態で対向することを特徴とする請求項４記載の電極。   5. The electrode according to claim 4, wherein when the glass tube is covered, the side surfaces of the plate members adjacent to each other along the axial direction of the glass tube face each other while being in contact with each other.
JP2008190939A 2008-07-24 2008-07-24 External electrode type discharge lamp and electrode Pending JP2010027560A (en)

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JP2008190939A JP2010027560A (en) 2008-07-24 2008-07-24 External electrode type discharge lamp and electrode
TW098122921A TW201011809A (en) 2008-07-24 2009-07-07 External electrode discharge lamp and electrode
KR1020090067414A KR20100011934A (en) 2008-07-24 2009-07-23 External electrode discharge lamp and electrode
CN200910160928A CN101667523A (en) 2008-07-24 2009-07-24 External electrode discharge lamp and electrode

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000173553A (en) * 1998-12-08 2000-06-23 Heraeus Noblelight Gmbh Discharge lamp
JP2004273432A (en) * 2003-02-19 2004-09-30 Nec Lighting Ltd External electrode type discharge lamp and manufacturing method of the same
JP2006318742A (en) * 2005-05-12 2006-11-24 Harison Toshiba Lighting Corp Fluorescent lamp and lighting system using it
JP2007053117A (en) * 2001-11-30 2007-03-01 Harison Toshiba Lighting Corp External electrode discharge lamp
JP2007134289A (en) * 2005-11-14 2007-05-31 Nec Lighting Ltd External electrode type discharge lamp, method of manufacturing same, and liquid crystal display device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000173553A (en) * 1998-12-08 2000-06-23 Heraeus Noblelight Gmbh Discharge lamp
JP2007053117A (en) * 2001-11-30 2007-03-01 Harison Toshiba Lighting Corp External electrode discharge lamp
JP2004273432A (en) * 2003-02-19 2004-09-30 Nec Lighting Ltd External electrode type discharge lamp and manufacturing method of the same
JP2006318742A (en) * 2005-05-12 2006-11-24 Harison Toshiba Lighting Corp Fluorescent lamp and lighting system using it
JP2007134289A (en) * 2005-11-14 2007-05-31 Nec Lighting Ltd External electrode type discharge lamp, method of manufacturing same, and liquid crystal display device

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TW201011809A (en) 2010-03-16
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