JP2010186567A - Electrode for cold cathode discharge tube, and cold cathode discharge tube - Google Patents

Electrode for cold cathode discharge tube, and cold cathode discharge tube Download PDF

Info

Publication number
JP2010186567A
JP2010186567A JP2009028084A JP2009028084A JP2010186567A JP 2010186567 A JP2010186567 A JP 2010186567A JP 2009028084 A JP2009028084 A JP 2009028084A JP 2009028084 A JP2009028084 A JP 2009028084A JP 2010186567 A JP2010186567 A JP 2010186567A
Authority
JP
Japan
Prior art keywords
discharge tube
cold cathode
cathode discharge
metal wire
electrode
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.)
Pending
Application number
JP2009028084A
Other languages
Japanese (ja)
Inventor
Shigeyuki Ashikawa
茂幸 足川
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.)
Panasonic Corp
Original Assignee
Panasonic Corp
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 Panasonic Corp filed Critical Panasonic Corp
Priority to JP2009028084A priority Critical patent/JP2010186567A/en
Publication of JP2010186567A publication Critical patent/JP2010186567A/en
Pending legal-status Critical Current

Links

Images

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrode for cold cathode discharge tube which is sealed with a shape hardly damaged, while making the space small that does not contribute to luminescence. <P>SOLUTION: This is provided an electrode 2 for cold cathode discharge tube which is directly sealed at each aperture end of a glass bulb 5 that is a constituent element of a cold cathode discharge tube 1, and has a bottomed tubular part 3 inserted into each aperture end and an introductory metal wire 4 extending from the bottom 3b of the bottomed tubular part 3; the outer face of the bottom 3b is formed in a curved surface and is formed to be smaller in diameter as it goes to the deepest part, and formed thick as it goes to the deepest part. Furthermore, the introductory metal wire 4 is formed by integrating coaxially a first metal wire 4a on the bottomed tubular part 3 side and a second metal wire 4b on the tip side formed in smaller diameter than the first metal wire 4a. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、ガラスバルブの両開口端部に冷陰極放電管用電極を封止する封止工程を簡素化することができると共に、冷陰極放電管の高輝度化を図ることができる冷陰極放電管用電極及び冷陰極放電管に関する。   INDUSTRIAL APPLICABILITY The present invention can simplify the sealing process for sealing the cold cathode discharge tube electrodes at both opening ends of the glass bulb and can increase the brightness of the cold cathode discharge tube. The present invention relates to an electrode and a cold cathode discharge tube.

従来の冷陰極放電管用電極（以下、単に電極という）として、例えば、有底筒状部と、該有底筒状部の底部から延出する導入金属線とを備えているものが知られている。導入金属線は、有底筒状部側の第一金属線と、第一金属線の給電端子側に設けられた第二金属線とで構成され、第一金属線及び第二金属線の端部が突き合わされて、同軸に一体化されている。   As a conventional cold cathode discharge tube electrode (hereinafter simply referred to as an electrode), for example, an electrode having a bottomed cylindrical portion and an introduction metal wire extending from the bottom of the bottomed cylindrical portion is known. Yes. The introduction metal wire is composed of a first metal wire on the bottomed cylindrical portion side and a second metal wire provided on the power supply terminal side of the first metal wire, and ends of the first metal wire and the second metal wire. The parts are abutted and integrated coaxially.

一方、従来の冷陰極放電管は、ビードガラスを上記導入金属線に溶着し、ガラスバルブの内径と導入金属線の外径との口径差を解消して、ガラスバルブの各開口端部をビードガラスによって封着することで、冷陰極放電管用電極をガラスバルブに封止しているのが一般的である。   On the other hand, in the conventional cold cathode discharge tube, bead glass is welded to the introduced metal wire to eliminate the difference in diameter between the inner diameter of the glass bulb and the outer diameter of the introduced metal wire, and each open end of the glass bulb is beaded. Generally, the cold cathode discharge tube electrode is sealed in a glass bulb by sealing with glass.

具体的には、ガラスバルブの内部に低圧ガスを封入しながら、減圧下でガラスバルブの各開口端部をバーナーなどで加熱し、加熱されたガラスが球状に縮まっていく性質を利用して、ガラスバルブの各開口端部を収縮させて、ビードガラスを溶着している。   Specifically, while sealing the low-pressure gas inside the glass bulb, each open end of the glass bulb is heated with a burner or the like under reduced pressure, and the heated glass shrinks into a spherical shape, Each open end of the glass bulb is contracted to weld the bead glass.

しかしこの場合、熱収縮によってガラスバルブの各開口端部の内径が縮小されて、有底筒状部の底部がガラスバルブの内壁に接触して、クラックが発生する恐れがある。   However, in this case, the inner diameter of each open end of the glass bulb is reduced by heat shrinkage, and the bottom of the bottomed cylindrical portion may come into contact with the inner wall of the glass bulb, thereby causing a crack.

この問題を解消することを目的として、従来の冷陰極放電管及びこれの構成要素である冷陰極放電管用電極が知られている（例えば特許文献１）。該冷陰極放電管１０及び電極１１は、図３（ａ）、（ｂ）に示すように、電極１１を、ガラスバルブ１３の内径よりも小径の有底筒状部１２と、該有底筒状部１２の筒部１２ａからテーパ面を有する中間部１２ｂを介して縮径された底部１２ｃに第一金属線１４ａにて固着される導入金属線１４とで構成し、ガラスバルブ１３の封止部分から電極１１の有底筒状部１２まで、ある程度の距離Ｌをとることによって、クラックの発生を防止している。なお、図中、１４ｂは導入金属線１４の第二金属線、１５はビードガラス、１６はガラスバルブ１３の内周面に形成された蛍光被膜を示す。   In order to solve this problem, a conventional cold cathode discharge tube and a cold cathode discharge tube electrode which is a component of the conventional cold cathode discharge tube are known (for example, Patent Document 1). As shown in FIGS. 3A and 3B, the cold cathode discharge tube 10 and the electrode 11 include the bottomed cylindrical portion 12 having a diameter smaller than the inner diameter of the glass bulb 13 and the bottomed tube. The glass bulb 13 is sealed with an introduction metal wire 14 fixed by a first metal wire 14a to a bottom portion 12c having a reduced diameter from a cylindrical portion 12a of the cylindrical portion 12 through an intermediate portion 12b having a tapered surface. The occurrence of cracks is prevented by taking a certain distance L from the portion to the bottomed cylindrical portion 12 of the electrode 11. In the figure, 14b is the second metal wire of the introduction metal wire 14, 15 is a bead glass, and 16 is a fluorescent film formed on the inner peripheral surface of the glass bulb 13.

また、図４（ａ）、（ｂ）に示すように、ビードガラスによる封止工程を省き、ガラスバルブ１３と電極１７との封止を簡易化することを目的とした従来の冷陰極放電管１０’が知られている（例えば特許文献２）。即ち、ガラスバルブ１３の内径と略同一外形の電極１７を直接封止し、発光に寄与しない無駄な空間をなくしている。
特開２００５−２６１３９号公報 特開２００７−８０５８２号公報 Further, as shown in FIGS. 4A and 4B, a conventional cold cathode discharge tube for the purpose of simplifying the sealing between the glass bulb 13 and the electrode 17 by omitting the sealing step using bead glass. 10 'is known (for example, Patent Document 2). That is, the electrode 17 having substantially the same outer shape as the inner diameter of the glass bulb 13 is directly sealed to eliminate a useless space that does not contribute to light emission.
JP 2005-26139 A Japanese Patent Laid-Open No. 2007-80582

しかしながら、従来の前記特許文献１の冷陰極放電管１０は、ビードガラス１５を用いて電極１１を封止している。図３（ｂ）に示すように、バーナーに近く最初に熱せられた部分は溶解して収縮するので、ガラスバルブ１３の内径が縮小して肉薄の部分Ａ（ヒケ）が形成される。一方、バーナーよりもやや遠くビードガラス１５に接する部分は、熱によって収縮するが、ビードガラス１５によって収縮方向がないので、肉厚の部分Ｂ（肉溜まり）が形成される。   However, the conventional cold cathode discharge tube 10 of Patent Document 1 uses the bead glass 15 to seal the electrode 11. As shown in FIG. 3B, the portion heated first near the burner is melted and contracted, so that the inner diameter of the glass bulb 13 is reduced to form a thin portion A (sink). On the other hand, the portion that is in contact with the bead glass 15 a little farther than the burner is shrunk by heat, but the bead glass 15 has no shrinking direction, so that a thick portion B (thickness reservoir) is formed.

また、収縮によって、ガラスバルブ１３の内径が縮小すると、ガラスバルブ１３の内壁が有底筒状部１２の底部１２ｃに接触してクラックが発生する恐れがあるので、ビードガラス１５の封止部分から有底筒状部１２までは、ある程度の距離をおいて電極１１を封止している。このため、封止部分から電極１１の有底筒状部１２までの距離Ｌが発光に寄与しない無駄な空間になって有効発光長が短くなってしまうという問題がある。   Further, if the inner diameter of the glass bulb 13 is reduced due to the shrinkage, the inner wall of the glass bulb 13 may come into contact with the bottom portion 12c of the bottomed cylindrical portion 12 and cracks may occur. The electrode 11 is sealed with a certain distance to the bottomed cylindrical portion 12. For this reason, there is a problem that the distance L from the sealed portion to the bottomed cylindrical portion 12 of the electrode 11 becomes a useless space that does not contribute to light emission and the effective light emission length is shortened.

また、従来の前記特許文献２の冷陰極放電管１０’は、ガラスバルブ１３の内径とほぼ同じ外径の電極１７を封止しているが、ガラスバルブ１３の開口端部を加熱して収縮させる際、前記冷陰極放電管１０と同様、図４（ｂ）に示すように、ガラスバルブ１３の収縮が不均一になって肉薄の部分Ａと肉厚の部分Ｂとができ、放電管点灯時に発生する熱の影響によって電極１７が膨張した場合に、応力によって肉薄の部分Ａからガラスバルブ１３が破損する原因になってしまう。   The conventional cold cathode discharge tube 10 ′ of Patent Document 2 seals the electrode 17 having an outer diameter substantially the same as the inner diameter of the glass bulb 13, but shrinks by heating the open end of the glass bulb 13. As shown in FIG. 4 (b), the glass bulb 13 contracts non-uniformly to form a thin portion A and a thick portion B as in the cold cathode discharge tube 10. When the electrode 17 expands due to the influence of heat that is sometimes generated, the glass bulb 13 is damaged from the thin portion A due to stress.

また、ガラスバルブ１３の周囲が減圧された状態でガラスバルブ１３の開口端部を加熱して収縮させた場合、ガラスバルブ１３の内周面が電極１７の先端部に接触しやすくなり、輸送時やバックライトユニットに実装する際の衝撃によって、肉薄の部分Ａからガラスバルブ１３が破損する恐れがある。   Further, when the opening end of the glass bulb 13 is heated and contracted in a state where the periphery of the glass bulb 13 is decompressed, the inner peripheral surface of the glass bulb 13 is likely to come into contact with the tip portion of the electrode 17, and during transportation. Further, the glass bulb 13 may be damaged from the thin portion A due to an impact when mounted on the backlight unit.

そこで、本発明は、前記問題点を鑑み、発光に寄与しない空間を少なくしながらも、破損しにくい形状で封止されるようにした冷陰極放電管用電極及び冷陰極放電管を提供することを課題とする。   Accordingly, in view of the above problems, the present invention provides a cold cathode discharge tube electrode and a cold cathode discharge tube that are sealed in a shape that is not easily damaged while reducing a space that does not contribute to light emission. Let it be an issue.

本発明に係る冷陰極放電管用電極は、冷陰極放電管の構成要素であるガラスバルブの各開口端部に直接封止される冷陰極放電管用電極であって、各開口端部に挿入される有底筒状部と、該有底筒状部の底部から延出する導入金属線とを備え、しかも、有底筒状部の底部の外面が曲面で構成されることを特徴とする。   An electrode for a cold cathode discharge tube according to the present invention is an electrode for a cold cathode discharge tube that is directly sealed at each opening end of a glass bulb that is a component of the cold cathode discharge tube, and is inserted into each opening end. It has a bottomed tubular part and an introduction metal wire extending from the bottom of the bottomed tubular part, and the outer surface of the bottom part of the bottomed tubular part is formed by a curved surface.

この場合、ガラスバルブの各開口端部を加熱して減圧により収縮した際、ガラスバルブの各開口端部が底部の曲面に沿って縮径されることになるので、肉厚（肉溜まり）及び肉薄（ヒケ）の部分の発生を抑制できる。特に肉厚（肉溜まり）部分はガラスバルブの外径よりも大きな外径になり易く、バックライトユニットに実装する際やユニットの輸送時に肉厚の部分がユニットに接触し、強度の低い肉薄の部分からガラスバルブが破損する原因となるが、肉厚（肉溜まり）及び肉薄（ヒケ）の部分の発生を抑制することによってガラスバルブの破損も抑制できる。   In this case, when each opening end portion of the glass bulb is heated and contracted by decompression, each opening end portion of the glass bulb is reduced in diameter along the curved surface of the bottom portion. The occurrence of thin parts can be suppressed. In particular, the thick part (wall reservoir) tends to be larger than the outer diameter of the glass bulb, and the thick part comes into contact with the unit when mounted on the backlight unit or when the unit is transported. Although it becomes a cause which a glass bulb breaks from a part, breakage of a glass bulb can also be controlled by suppressing generation of a thick part (thickness accumulation) and a thin part (sink).

しかも、肉溜まりのできやすいガラスバルブの開口端部が、該開口端部から中心に向かって縮径する際に、ビードガラスの代わりとして導入金属線を包むようになるので、確実な封止が可能になる。   In addition, when the diameter of the opening end of the glass bulb, which is easy to collect, is reduced from the opening end toward the center, it wraps the introduced metal wire instead of the bead glass, so that reliable sealing is possible. become.

さらに、ガラスバルブの開口端部が中心に向かって均一に収縮させることで、肉厚（肉溜まり）及び肉薄（ヒケ）の部分の発生を抑制できるようになることから、冷陰極放電管の点灯時に起こるスパッタリングの衝撃に強い冷陰極放電管を製造することが可能となる。   Furthermore, since the opening end of the glass bulb shrinks uniformly toward the center, it is possible to suppress the occurrence of thick (thin) and thin (sink) portions, so that the cold cathode discharge tube can be turned on. It becomes possible to manufacture a cold cathode discharge tube that is resistant to sputtering impact that sometimes occurs.

請求項２の発明によれば、前記底部を、導入金属線に向かうにしたがって小径となるように形成するようにしてもよい。   According to invention of Claim 2, you may make it form the said bottom part so that it may become a small diameter as it goes to an introductory metal wire.

この場合、熱収縮するガラスバルブの開口端部が、該開口端部から中心部に向かって円滑に且つ均一に縮径されるので、より一層確実な封止ができるようになり、ガラスバルブの端部を密着性よく、封止面積も広くできることから応力が分散し易く、輸送時やバックライトユニットに実装する際の衝撃に強い冷陰極放電管を製造することが可能となる。
。 In this case, the opening end portion of the glass bulb that undergoes heat shrinkage is smoothly and uniformly reduced in diameter from the opening end portion toward the center portion, so that more reliable sealing can be achieved. Since the end portion has good adhesion and the sealing area can be widened, the stress is easily dispersed, and it becomes possible to manufacture a cold cathode discharge tube that is resistant to impact during transportation or mounting on the backlight unit.
.

請求項３の発明によれば、前記底部を、導入金属線部に向かうにしたがって肉厚となるように形成するような構成を選択することもできる。   According to invention of Claim 3, the structure which forms the said bottom part so that it may become thick as it goes to an introduction metal wire part can also be selected.

この場合、底部が肉厚になることで、熱吸収が良好になり、電極の膨張を低減できる。また、肉厚に形成される有底筒状部の底部が曲面で構成されるため、ガラスバルブの応力を分散しやすくなり、輸送時やバックライトユニットに実装する際のガラスバルブの破損を防止できるようになる。   In this case, when the bottom is thick, heat absorption is improved, and expansion of the electrode can be reduced. In addition, since the bottom of the bottomed cylindrical part that is formed with a thick wall is configured with a curved surface, it is easy to disperse the stress of the glass bulb and prevent breakage of the glass bulb during transportation or mounting on the backlight unit. become able to.

請求項４の発明によれば、前記導入金属線を、有底筒状部側の第一金属線が、給電端子側の第二金属線よりも大径に形成され、前記第一金属線と前記第二金属線とが同軸に一体化されるように構成してもよい。   According to the invention of claim 4, the first metal wire on the bottomed cylindrical portion side of the introduction metal wire is formed to have a larger diameter than the second metal wire on the power supply terminal side, You may comprise so that said 2nd metal wire may be integrated coaxially.

この場合、第一金属線とガラスバルブの内径との口径差を解消することができると共に、点灯中の電極の放熱効果を向上することができる。したがって、電極の膨張を低減することになる。   In this case, it is possible to eliminate the difference in aperture between the first metal wire and the inner diameter of the glass bulb, and it is possible to improve the heat dissipation effect of the electrode during lighting. Therefore, the expansion of the electrode is reduced.

本発明に係る冷陰極放電管は、冷陰極放電管の構成要素であるガラスバルブの各開口端部に前記いずれかの冷陰極放電管用電極を挿入した状態で各開口端部を加熱して収縮させることで、冷陰極放電管用電極がガラスバルブの各開口端部に直接封止されてなることを特徴とする。   The cold cathode discharge tube according to the present invention is contracted by heating each open end in a state where any one of the cold cathode discharge tube electrodes is inserted into each open end of a glass bulb that is a component of the cold cathode discharge tube. By doing so, the cold cathode discharge tube electrode is directly sealed at each opening end of the glass bulb.

この場合、電極を直接封止するとは、前記底部の最深部がガラスバルブの各開口端部よりも内側に位置し、導入金属線を封止する場合、及び、底部の最深部が外部に露出している場合を含むものとする。   In this case, the direct sealing of the electrode means that the deepest part of the bottom part is located inside each opening end part of the glass bulb and the introduction metal wire is sealed, and the deepest part of the bottom part is exposed to the outside. Including cases where

また、本発明に係る照明装置は、不要で外径が太くなってしまう肉厚の部分ない冷陰極放電管を用いているので、肉厚の部分が装置内部に接触しないよう間隔を設けて実装する必要がなくなり、装置を薄型化することができる。   In addition, since the lighting device according to the present invention uses a cold cathode discharge tube that is unnecessary and does not have a thick part that increases the outer diameter, it is mounted with a gap so that the thick part does not contact the inside of the device. Therefore, the apparatus can be thinned.

本発明によれば、有底筒状部の底部が曲面で構成されているため、ビードガラスを用いることなく、ガラスバルブの各開口端部に直接封止することができるので、冷陰極放電管の部品点数を少なくすることができる。   According to the present invention, since the bottom portion of the bottomed cylindrical portion is formed of a curved surface, it can be directly sealed at each opening end portion of the glass bulb without using bead glass. The number of parts can be reduced.

また、本発明によれば、ガラスバルブの各開口端部を加熱して減圧により収縮し、底部に上記曲面を有する電極をガラスバルブの各開口端部に直接封止するようにしたので、肉厚（肉溜まり）及び肉薄（ヒケ）の部分の発生を抑制することができ、点灯時の電極の膨張、輸送時やバックライトユニットに実装する際の衝撃によってガラスバルブが破損することがなく、長寿命化を図ることができる。   Also, according to the present invention, each opening end of the glass bulb is heated and contracted by decompression, and the electrode having the curved surface at the bottom is directly sealed to each opening end of the glass bulb. The generation of thick (thickness) and thin (sink) parts can be suppressed, and the glass bulb is not damaged by the expansion of the electrode during lighting, impact during transportation or mounting on the backlight unit, Long life can be achieved.

また、電極の封止部から有底筒状部の開口部分の距離を短くできるので、ガラスバルブ内で発光に寄与しない空間を削減することが可能となる。   In addition, since the distance from the sealing portion of the electrode to the opening of the bottomed cylindrical portion can be shortened, it is possible to reduce the space that does not contribute to light emission in the glass bulb.

本発明に係る冷陰極放電管用電極及び冷陰極放電管の一実施形態について図１及び図２を参照して説明する。これらの図において、図３及び図４と同一符号は同一もしくは相当するものを示す。   An embodiment of a cold cathode discharge tube electrode and a cold cathode discharge tube according to the present invention will be described with reference to FIGS. 1 and 2. In these drawings, the same reference numerals as those in FIGS. 3 and 4 denote the same or corresponding components.

本実施形態に係る冷陰極放電管用電極２は、図１に示すように、筒部３ａ及び底部３ｂからなる有底筒状部３と、該有底筒状部３の底部３ｂから延出される導入金属線４とを備えた一体型電極であり、ニオブ・タングステン・コバールなどの金属を用いて、燒結金属または金属プレスで形成されている。   As shown in FIG. 1, the cold cathode discharge tube electrode 2 according to the present embodiment extends from a bottomed cylindrical portion 3 including a cylindrical portion 3 a and a bottom portion 3 b and from a bottom portion 3 b of the bottomed cylindrical portion 3. This is an integrated electrode provided with an introduction metal wire 4, and is formed by a sintered metal or a metal press using a metal such as niobium, tungsten, and kovar.

有底筒状部３は、ガラスバルブ５の内径よりもやや小径の外形で形成されている。   The bottomed cylindrical portion 3 is formed with an outer shape slightly smaller than the inner diameter of the glass bulb 5.

また、有底筒状部３の底部３ｂは、側断面が最深部に向かうにしたがって小径となる略Ｕ字形状を呈しており、軸の外方向に突出する曲面、例えば、半球面、回転放物面、円錐面、テーパ面（球帯）のうちいずれかに形成されている。これによって、ガラスバルブ５の各開口端部を加熱して減圧により収縮した際、溶融したガラスバルブ５の各開口端部が上記曲面の周縁部から中心部に向かって収縮し、電極２が封止される。この際、上記曲面に沿うように収縮するので、応力が分散されて、肉厚の部分（肉溜まり）や肉薄の部分（ヒケ）の発生を抑制できる。   In addition, the bottom 3b of the bottomed cylindrical portion 3 has a substantially U shape with a side section that decreases in diameter toward the deepest portion, and is a curved surface that protrudes outward from the shaft, for example, a hemispherical surface. It is formed on any one of an object surface, a conical surface, and a tapered surface (sphere band). As a result, when each open end of the glass bulb 5 is heated and contracted by decompression, each open end of the melted glass bulb 5 contracts from the peripheral edge of the curved surface toward the center, and the electrode 2 is sealed. Stopped. At this time, since it contracts along the curved surface, the stress is dispersed, and generation of a thick portion (thickness accumulation) or a thin portion (sink) can be suppressed.

また、有底筒状部３の底部３ｂは、最深部に向かうにしたがって肉厚となるように形成されている。この理由としては、熱吸収が良好になり、電極２の膨張を低減できる。また、肉厚に形成される底部３ｂは、軸の外方向に突出する曲面であるため、ガラスバルブ５の応力を分散しやすくなり、輸送時やバックライトユニットに実装する際のガラスバルブ５の破損を防止できるようになる。   Moreover, the bottom part 3b of the bottomed cylindrical part 3 is formed so as to become thicker toward the deepest part. The reason for this is that heat absorption is good and expansion of the electrode 2 can be reduced. Further, the bottom portion 3b formed to be thick is a curved surface protruding outward from the shaft, so that the stress of the glass bulb 5 is easily dispersed, and the glass bulb 5 is mounted at the time of transportation or mounting on the backlight unit. Damage can be prevented.

導入金属線４は、有底筒状部３側に配置される第一金属線４ａと、給電側に配置される、第一金属線４ａよりも小径の第二金属線４ｂとが突合せ溶接によって、同軸に一体化されている。該第二金属線４ｂを第一金属線４ａよりも小径にすることで、電極２の放熱効率が著しく向上する。   The introduction metal wire 4 is formed by butt welding a first metal wire 4a arranged on the bottomed cylindrical portion 3 side and a second metal wire 4b arranged on the power feeding side and having a smaller diameter than the first metal wire 4a. It is integrated on the same axis. By making the second metal wire 4b smaller in diameter than the first metal wire 4a, the heat dissipation efficiency of the electrode 2 is remarkably improved.

つぎに本実施形態に係る冷陰極放電管の製造方法について説明する。まず、ガラスバルブ５の各開口端部の内側に、一対の電極２，２を配置させた状態で周囲を減圧し、ガラスバルブ５内に放電ガスを流入させる。
続いて、ガラスバルブ５の各開口端部を加熱して減圧と熱により収縮すると、ビードガラスを用いることなく、導入金属線４が直接封止されて、冷陰極放電管１が完成される。 Next, a manufacturing method of the cold cathode discharge tube according to this embodiment will be described. First, the surroundings are depressurized in a state where the pair of electrodes 2, 2 are arranged inside each open end of the glass bulb 5, and the discharge gas flows into the glass bulb 5.
Subsequently, when each opening end of the glass bulb 5 is heated and contracted by reduced pressure and heat, the introduced metal wire 4 is directly sealed without using the bead glass, and the cold cathode discharge tube 1 is completed.

なお、本実施形態に係る冷陰極放電管用電極２は、上記した実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。   The cold cathode discharge tube electrode 2 according to the present embodiment is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.

例えば、前記実施形態に係る冷陰極放電管１においては、導入金属線４を封止するようにしたが、図２に示すように、有底筒状部３の底部３ｂをガラスバルブ５の各開口端部よりもやや外側に位置させた状態で、即ち該底部３ｂの最深部が外部に露出した状態で封止するようにしてもよい。この場合、底部３ｂの最深部を除く部位の曲面に、ガラスバルブ５の各開口端部が沿うように溶着されるので、ガラスバルブ５の内径との口径差をさらに解消できるようになる。肉溜まりとなるガラスバルブ５の各開口端部は、ビードガラスの代わりとして導入金属線４を包むので、確実な封止ができるようになる。また、有底筒状部３の底部３ｂの最深部が外部に露出することで、放熱面積が増大し、電極２の放熱効果がより一層良くなって、電極２の膨張をより低減できるようになる。   For example, in the cold cathode discharge tube 1 according to the embodiment, the introduction metal wire 4 is sealed, but the bottom 3b of the bottomed cylindrical portion 3 is connected to each glass bulb 5 as shown in FIG. You may make it seal in the state located in the outer side slightly from the opening edge part, ie, the deepest part of this bottom part 3b exposed outside. In this case, since the opening ends of the glass bulb 5 are welded along the curved surface of the portion excluding the deepest portion of the bottom portion 3b, the difference in diameter from the inner diameter of the glass bulb 5 can be further eliminated. Each opening end portion of the glass bulb 5 serving as a meat reservoir wraps the introduction metal wire 4 instead of the bead glass, so that reliable sealing can be performed. Further, the deepest portion of the bottom 3b of the bottomed cylindrical portion 3 is exposed to the outside so that the heat dissipation area is increased, the heat dissipation effect of the electrode 2 is further improved, and the expansion of the electrode 2 can be further reduced. Become.

また、発光に寄与しない電極２の有底筒状部３をできるだけガラスバルブ５の端部側に配置できるので、有効発光長を延長でき、高輝度化が図れるようになる。   Further, since the bottomed cylindrical portion 3 of the electrode 2 that does not contribute to light emission can be arranged as close to the end portion of the glass bulb 5, the effective light emission length can be extended and high luminance can be achieved.

本発明に係る冷陰極放電管用電極及び冷陰極放電管は、パーソナルコンピュータ、液晶テレビあるいは携帯情報端末（ＰＤＡ）などに多用されている液晶表示装置のバックライトユニットに有効に利用することができる。   The electrode for a cold cathode discharge tube and the cold cathode discharge tube according to the present invention can be effectively used for a backlight unit of a liquid crystal display device that is frequently used in personal computers, liquid crystal televisions, personal digital assistants (PDAs), and the like.

本発明の一実施形態に係る冷陰極放電管の断面図Sectional drawing of the cold cathode discharge tube which concerns on one Embodiment of this invention 他の実施形態の断面図Cross-sectional view of another embodiment 従来の冷陰極放電管を示す断面図Sectional view showing a conventional cold cathode discharge tube 他の従来の冷陰極放電管を示す断面図Sectional view showing another conventional cold cathode discharge tube

１ 冷陰極放電管
２ 冷陰極放電管用電極
３ 有底筒状部
３ａ 筒部
３ｂ 底部
４ 導入金属線
４ａ 第一金属線
４ｂ 第二金属線
５ ガラスバルブ DESCRIPTION OF SYMBOLS 1 Cold cathode discharge tube 2 Cold cathode discharge tube electrode 3 Bottomed cylindrical part 3a Tube part 3b Bottom part 4 Introduced metal wire 4a First metal wire 4b Second metal wire 5 Glass bulb

Claims (6)

冷陰極放電管の構成要素であるガラスバルブの各開口端部に直接封止される冷陰極放電管用電極であって、各開口端部に挿入される有底筒状部と、該有底筒状部の底部から延出する導入金属線とを備え、前記有底筒状部の底部の外面が曲面で構成されることを特徴とする冷陰極放電管用電極。 An electrode for a cold cathode discharge tube that is directly sealed at each opening end of a glass bulb that is a component of the cold cathode discharge tube, and a bottomed cylindrical portion that is inserted into each opening end, and the bottomed tube An electrode for a cold cathode discharge tube, comprising: an introduction metal wire extending from a bottom portion of the shaped portion, wherein an outer surface of the bottom portion of the bottomed tubular portion is configured by a curved surface. 前記底部は、導入金属線に向かうにしたがって小径となるように形成されることを特徴とする請求項１に記載の冷陰極放電管用電極。 The cold cathode discharge tube electrode according to claim 1, wherein the bottom portion is formed to have a smaller diameter toward the introduction metal wire. 前記底部は、導入金属線に向かうにしたがって肉厚となるように形成されることを特徴とする請求項１又は２に記載の冷陰極放電管用電極。 The cold cathode discharge tube electrode according to claim 1 or 2, wherein the bottom portion is formed so as to become thicker toward an introduction metal wire. 前記導入金属線は、有底筒状部側の第一金属線が、給電端子側の第二金属線よりも大径に形成され、前記第一金属線と前記第二金属線とが同軸に一体化されることを特徴とする請求項１乃至３のいずれか１項に記載の冷陰極放電管用電極。 The introduction metal wire is formed such that the first metal wire on the bottomed cylindrical portion side has a larger diameter than the second metal wire on the power supply terminal side, and the first metal wire and the second metal wire are coaxial. The electrode for a cold cathode discharge tube according to any one of claims 1 to 3, wherein the electrode is integrated. 冷陰極放電管の構成要素であるガラスバルブの各開口端部に請求項１乃至４のいずれか１項に記載の冷陰極放電管用電極を挿入した状態で各開口端部を加熱して収縮させることで、冷陰極放電管用電極がガラスバルブの各開口端部に直接封止されてなることを特徴とする冷陰極放電管。 5. Each open end is heated and contracted in a state where the cold cathode discharge tube electrode according to any one of claims 1 to 4 is inserted into each open end of a glass bulb that is a component of the cold cathode discharge tube. Thus, the cold cathode discharge tube is characterized in that the cold cathode discharge tube electrode is directly sealed at each opening end of the glass bulb. 請求項５に記載の冷陰極放電管を備えたことを特徴とする照明装置。 An illumination device comprising the cold cathode discharge tube according to claim 5.
JP2009028084A 2009-02-10 2009-02-10 Electrode for cold cathode discharge tube, and cold cathode discharge tube Pending JP2010186567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009028084A JP2010186567A (en) 2009-02-10 2009-02-10 Electrode for cold cathode discharge tube, and cold cathode discharge tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009028084A JP2010186567A (en) 2009-02-10 2009-02-10 Electrode for cold cathode discharge tube, and cold cathode discharge tube

Publications (1)

Publication Number Publication Date
JP2010186567A true JP2010186567A (en) 2010-08-26

Family

ID=42767109

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009028084A Pending JP2010186567A (en) 2009-02-10 2009-02-10 Electrode for cold cathode discharge tube, and cold cathode discharge tube

Country Status (1)

Country Link
JP (1) JP2010186567A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2325804A2 (en) 2009-11-20 2011-05-25 Ricoh Company, Ltd. Image-drawing processing system, server, user terminal, image-drawing processing method, program, and storage medium

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2325804A2 (en) 2009-11-20 2011-05-25 Ricoh Company, Ltd. Image-drawing processing system, server, user terminal, image-drawing processing method, program, and storage medium

Similar Documents

Publication Publication Date Title
JP5840432B2 (en) Discharge lamp
JP5167955B2 (en) Xenon lamp
JP5080327B2 (en) Discharge lamp with sealing structure
US6713957B2 (en) Super-high pressure discharge lamp of the short arc type
KR101066680B1 (en) Discharge lamp
JP2004178894A (en) Short arc type discharge lamp
JP2010186567A (en) Electrode for cold cathode discharge tube, and cold cathode discharge tube
JP2005259403A (en) Discharge lamp
JP2009193768A (en) Short arc high-pressure discharge lamp
US20150115844A1 (en) Short arc type discharge lamp
JP2005339999A (en) Metal halide lamp
JP5170573B2 (en) Short arc type discharge lamp
JP5527222B2 (en) Short arc type discharge lamp
JP2010033864A (en) High-pressure discharge lamp
JP2019046562A (en) Discharge lamp
JP2004265663A (en) Discharge lamp
CN207852614U (en) Discharge lamp
JP2006114240A (en) Short arc type extra high pressure discharge lamp
KR20170011992A (en) Short arc type flash lamp with both ends sealed
JP2009224028A (en) Seal portion structure of short-arc discharge lamp
WO2012014608A1 (en) High-intensity discharge lamp
JP5516458B2 (en) Short arc type discharge lamp
JP4900491B2 (en) Short arc type discharge lamp
JP2005183164A (en) Arc tube for discharge lamp apparatus
JP6883410B2 (en) Discharge lamp and manufacturing method of discharge lamp