JPH11250807A - Fluorescent lamp - Google Patents
Fluorescent lampInfo
- Publication number
- JPH11250807A JPH11250807A JP368599A JP368599A JPH11250807A JP H11250807 A JPH11250807 A JP H11250807A JP 368599 A JP368599 A JP 368599A JP 368599 A JP368599 A JP 368599A JP H11250807 A JPH11250807 A JP H11250807A
- Authority
- JP
- Japan
- Prior art keywords
- glass tube
- glass
- mercury
- sealed
- lamp
- 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
Links
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、低圧放電灯に係
り、特にバックライト用蛍光ランプのような細径の低圧
放電灯に関する。The present invention relates to a low-pressure discharge lamp, and more particularly to a small-diameter low-pressure discharge lamp such as a fluorescent lamp for a backlight.
【０００２】[0002]
【従来の技術】ゲッター材と水銀放出合金からなる電極
を使用した冷陰極放電灯については、実開昭60−57052
号に記載されている。2. Description of the Related Art A cold cathode discharge lamp using an electrode composed of a getter material and a mercury-releasing alloy is disclosed in Japanese Utility Model Application Laid-Open No. 60-57052.
No.
【０００３】[0003]
【発明が解決しようとする課題】上記従来の冷陰極形蛍
光ランプは、効率の面で十分でなく、且つ寿命も短いと
いう欠点があった。The above-mentioned conventional cold-cathode fluorescent lamps have the drawbacks that they are not efficient enough and have a short life.
【０００４】本発明の目的は、細径で、高効率で、長寿
命である蛍光ランプを提供することであるIt is an object of the present invention to provide a fluorescent lamp having a small diameter, high efficiency and long life.
【０００５】[0005]
【課題を解決するための手段】上記目的は、少なくとも
ランプの外径を４.０mm以下にし、希ガスの圧力を１５T
orr以上にすることによって達成される。さらに、上記
ランプの外径を３.５mmから１.５mmの範囲にし、希ガス
の圧力を２０Torrから１００Torrの範囲にすることによ
って上記目的はより一層達成される。The object of the present invention is to at least reduce the outer diameter of the lamp to 4.0 mm or less and reduce the pressure of the rare gas to 15 T or less.
Achieved by over orr. Further, the above object is further achieved by setting the outer diameter of the lamp in the range of 3.5 mm to 1.5 mm and the pressure of the rare gas in the range of 20 Torr to 100 Torr.
【０００６】少なくとも蛍光ランプの外径を４.０mm以
下にすると、電極で消費される電力に対して陽光性にお
ける消費電力の割合が増大し、従って高効率が達成され
る。さらに、希ガスの圧力を１５Torr以上にすることに
より、陰極降下電圧が低下し、従って、高効率と長寿命
の低圧放電灯が得られる。[0006] When the outer diameter of the fluorescent lamp is at least 4.0 mm or less, the ratio of the power consumption in the sunlight to the power consumed by the electrodes increases, and thus high efficiency is achieved. Further, by setting the pressure of the rare gas to 15 Torr or more, the cathode drop voltage is reduced, so that a low-pressure discharge lamp with high efficiency and long life can be obtained.
【０００７】上記金属の周囲に複数個のペレットを設け
ると、電極を極端に大きくすることなく、電極の表面積
と水銀の封入量を大きくできるので、長寿命が得られ
る。When a plurality of pellets are provided around the above-mentioned metal, the surface area of the electrode and the amount of enclosed mercury can be increased without making the electrode extremely large, so that a long life can be obtained.
【０００８】[0008]
【発明の実施の形態】以下、本発明の実施例を図１から
図９により説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【０００９】先ず、ガラス管の切断方法を図８により説
明する。図８の（ａ）に示す。管径３.５mm，肉厚０.４
mm，全長１２５０mmのソーダガラスまたは鉛ガラス製の
ガラス管１を、図８（ｂ）に示す様に切断個所を加熱２
した後、図８の（ｃ）に示すように、全長２５０mmのガ
ラス管４とする。切断するときの他の方法として、前も
って切断個所に傷を付けておき、その個所を加熱して切
断する方法や、カッターを用いて切断する方法がある。First, a method of cutting a glass tube will be described with reference to FIG. This is shown in FIG. Tube diameter 3.5mm, wall thickness 0.4
A glass tube 1 made of soda glass or lead glass having a total length of 1250 mm and a total length of 1250 mm is heated at a cutting position as shown in FIG.
After that, as shown in FIG. 8C, a glass tube 4 having a total length of 250 mm is formed. As other methods for cutting, there are a method in which a cutting portion is scratched in advance and the portion is heated and cut, or a method in which a cutting is performed using a cutter.
【００１０】次に、切断したガラス管の洗管，蛍光体の
塗布方法を図２により説明する。図２（ａ）に示すよう
にガラス管４を縦に置き、管上部のノズル５より水６を
流して洗管する。その後図２（ｂ）のように、ガラス管
４の管上部のノズル７より空気８を吹きだして管内部の
水を飛ばし、かつ乾燥させる。このとき温風を吹きだす
と早く乾燥する。その後、図２（ｃ）に示すようにガラ
ス管４の管下部にノズル９を密着させ、蛍光体乳剤１０
を管内部に圧入する。この際、液面が管上部より約５０
mmの個所１１まで圧入し、その後ノズル９より乳剤１０
は吸いだす。この方法により、どんな細いガラス管の塗
布も可能となる。使用する蛍光体乳剤は、バインダとし
て有機溶剤を用いるが、水性バインダを用いてもよい。
また蛍光体は三波長蛍光体を用いる。Next, a method for washing the cut glass tube and applying the phosphor will be described with reference to FIG. As shown in FIG. 2 (a), the glass tube 4 is placed vertically, and water 6 is flowed from a nozzle 5 at the top of the tube to wash the tube. Thereafter, as shown in FIG. 2B, air 8 is blown out from a nozzle 7 at the upper part of the glass tube 4 to blow off water inside the tube and to dry the tube. If hot air is blown out at this time, it dries quickly. Thereafter, as shown in FIG. 2C, a nozzle 9 is brought into close contact with the lower portion of the glass tube 4 so that the phosphor emulsion 10
Into the tube. At this time, the liquid level is about 50
mm, and then press the emulsion 9
Suck out. In this way, any thin glass tube can be applied. The phosphor emulsion used uses an organic solvent as a binder, but may use an aqueous binder.
Further, a three-wavelength phosphor is used as the phosphor.
【００１１】次に図２の（ｄ）のように、蛍光体を塗布
したガラス管４の管上部のノズル１２より空気１３を吹
きだして乾燥させる。蛍光体が流れ落ちるので、管上部
の蛍光体膜の厚みが薄くなるが、この様に管上部から空
気を送入すると、上部の蛍光体が流れ落ちる前に乾燥す
るので、蛍光体膜厚が均一になるという利点が生じる。
また、空気は温風ならなお良い。蛍光体が完全に乾燥し
おわる前に、封止部分の蛍光体を除去するため、図２の
（ｅ）に示すように、ガラス管４の管下部に配置したノ
ズル１４より水、または有機溶剤１５を噴出させ管端の
蛍光体を取り除く。Next, as shown in FIG. 2 (d), air 13 is blown out from a nozzle 12 on the upper portion of the glass tube 4 coated with the phosphor, and dried. Since the phosphors flow down, the thickness of the phosphor film at the top of the tube becomes thin.However, when air is introduced from the top of the tube, the phosphor at the top is dried before flowing down, so the phosphor film thickness is uniform. This has the advantage of becoming
The air is even better if it is warm air. Before the phosphor is completely dried, in order to remove the phosphor in the sealed portion, as shown in FIG. 2 (e), water or an organic solvent is supplied from a nozzle 14 arranged below the glass tube 4. Then, the fluorescent material at the end of the tube is removed.
【００１２】次に、使用するマウントの構造を図３によ
り説明する。幅２mm長さ４mmのニッケル板１６に、放電
用の水銀を放出するための水銀合金１７とゲッタ剤１８
を塗布したものを、リード線１９に溶接する。この時の
リード線の材質は、ガラス管がソーダガラスであれば、
ニッケル，クロム，鉄を主成分とした合金を使用し、鉛
ガラスであればニッケル線とジュメット線を溶接でつな
いだものを使用する。その後リード線の途中に、直径
１.８mm（ガラス管内径より少し小さい）のガラス玉２
０を形成してマウントとする。このとき水銀ディスペン
サを塗布したニッケル板の数は複数でも良い。Next, the structure of the mount used will be described with reference to FIG. A mercury alloy 17 for discharging mercury for discharge and a getter agent 18 are placed on a nickel plate 16 having a width of 2 mm and a length of 4 mm.
Is applied to the lead wire 19. At this time, if the material of the lead wire is soda glass,
An alloy containing nickel, chromium, and iron as main components is used, and a lead glass in which a nickel wire and a dumet wire are connected by welding is used. Then, in the middle of the lead wire, a glass ball 2 with a diameter of 1.8 mm (slightly smaller than the inner diameter of the glass tube)
0 is formed as a mount. At this time, the number of nickel plates coated with the mercury dispenser may be plural.
【００１３】上記の実施例においては、ランプへの水銀
の封入を水銀ディスペンサを用いて行ったが、本発明の
ように管径が著しく細いランプの場合に、電極の大きさ
が限定され、従って水銀（合金）の量も限定されるため
に、ランプ内に封入出来る水銀の上限は限定されてしま
う。冷陰極蛍光ランプの場合には水銀の量によって寿命
が決定されているので、上記の様に水銀合金を用いた場
合には、寿命はそれほど長くならない。In the above embodiment, mercury is sealed in the lamp using a mercury dispenser. However, in the case of a lamp having a very small tube diameter as in the present invention, the size of the electrodes is limited. Since the amount of mercury (alloy) is also limited, the upper limit of mercury that can be sealed in the lamp is limited. In the case of a cold cathode fluorescent lamp, the life is determined by the amount of mercury. Therefore, when a mercury alloy is used as described above, the life is not so long.
【００１４】圧力２０Torr以上の水銀蒸気をランプ内に
導入する方法を用いれば、水銀の封入量は多くなり、従
って長寿命のランプが得られる。また、水銀ディスペン
サを用いた場合には、電極の形状が限定され、かつ、電
極の材質の一部は水銀ディスペンサになってしまうのに
対して、水銀蒸気を封入する方法や、水銀粒を封入する
方法を用いると、電極の材質，形状の選択が自由にな
り、長寿命，高効率のランプが得られる。If a method of introducing mercury vapor at a pressure of 20 Torr or more into the lamp is used, the amount of mercury enclosed increases, and a long-life lamp is obtained. In addition, when a mercury dispenser is used, the shape of the electrode is limited, and a part of the material of the electrode becomes a mercury dispenser. With this method, the electrode material and shape can be freely selected, and a long-life and high-efficiency lamp can be obtained.
【００１５】次に、蛍光体の焼成方法について図４によ
り説明する。蛍光体を塗布したガラス管２１の上部（ガ
ラス管の中で蛍光体を塗布していない部分）をチャック
２２でつかみ、内部に発熱体２４を設けた焼成炉２３に
吊下げて焼成する。この時の炉内温度は約５００℃であ
る。この時ガラス管２１上部よりノズル２５で空気を送
りこみ、焼成時に発生する蛍光体からのガスを除去する
と、短時間で焼成出来る利点が生じる。Next, a method of firing the phosphor will be described with reference to FIG. The upper part of the glass tube 21 coated with the phosphor (the part where the phosphor is not coated in the glass tube) is gripped by a chuck 22, suspended in a firing furnace 23 having a heating element 24 provided therein, and fired. The furnace temperature at this time is about 500 ° C. At this time, if air is sent from the upper part of the glass tube 21 by the nozzle 25 to remove gas from the phosphor generated during firing, there is an advantage that firing can be performed in a short time.
【００１６】次に、焼成済ガラス管への電極封着（ガイ
ド側）について、図５により説明する。図５（ａ）に示
すように、ガラス管２６下部に、マウント２８を挿入
し、図５の（ｂ）に示すように、周囲よりバーナを当
て、（ｃ）に示すように封着する。この時、電極の酸化
を防止するため、Ｎ2または希ガスなど流入することが
望ましい。また、ガイド側のマウントは、ガラスビーズ
２０が無くても良い。Next, the sealing of the electrode to the fired glass tube (on the guide side) will be described with reference to FIG. As shown in FIG. 5 (a), a mount 28 is inserted into the lower part of the glass tube 26, a burner is applied from the periphery as shown in FIG. 5 (b), and sealing is performed as shown in FIG. 5 (c). At this time, in order to prevent oxidation of the electrode, it is desirable to flow N 2 or a rare gas. The mount on the guide side may not have the glass beads 20.
【００１７】次に、ランプの排気工程を図６により説明
する。図６の（ａ）に示すように、排気系３０にマウン
ト３１と封止済みガラス管３２を取り付ける。この時マ
ウント３１のガラスビーズの部分をガラス管の封止部分
にあわせる。その後ガラス及び蛍光体に吸着している水
分を取り除くためにガラス管を排気炉３３に入れ、同時
にガラス管内圧力を１０2〜１０5Torr程度にするためポ
ンプで排気する。充分に圧力が下がった後（ｂ）図に示
すように、水銀（水銀ディスペンサを用いない場合）及
びアルゴンガス３５を封入する。次に、（ｃ）図に示す
ように排気側マウント３１をガラスビーズの位置でガラ
ス管と封着する。このガラスビーズを使用することによ
り封着部の強度が上がる。その後（ｄ）図に示すように
封着部で切り離す。Next, the lamp exhaust process will be described with reference to FIG. As shown in FIG. 6A, a mount 31 and a sealed glass tube 32 are attached to an exhaust system 30. At this time, the glass bead portion of the mount 31 is matched with the sealing portion of the glass tube. Then the glass and the glass tube to remove moisture adsorbed to the phosphor was placed in the exhaust furnace 33 is evacuated by a pump to the glass tube pressure of about 10 2 to 10 5 Torr at the same time. After the pressure is sufficiently lowered, (b) mercury (when no mercury dispenser is used) and an argon gas 35 are filled as shown in FIG. Next, as shown in FIG. 3C, the exhaust side mount 31 is sealed with the glass tube at the position of the glass beads. Use of the glass beads increases the strength of the sealing portion. Thereafter, as shown in FIG.
【００１８】つぎに図７に示すように、水銀ディスペン
サより水銀を出すために、電極部の高周波加熱を加う。
コイル４０を電極近傍に設け、電極を充分に加熱するた
めに１ＭＨｚ以上の高周波を使用して加熱する。Next, as shown in FIG. 7, in order to discharge mercury from the mercury dispenser, high-frequency heating of the electrode portion is applied.
The coil 40 is provided near the electrode, and is heated using a high frequency of 1 MHz or more to sufficiently heat the electrode.
【００１９】このとき、コイル内でランプを動かしなが
ら加熱すると電極均一に温度が上がる。At this time, if the heating is performed while moving the lamp in the coil, the temperature of the electrode rises uniformly.
【００２０】その後、ランプ電流５〜１５ｍＡで約１０
時間ほど点灯し、エージングを行いランプとして完成す
る。図１は完成したランプの断面図である。Thereafter, at a lamp current of 5 to 15 mA, about 10
Lights for about an hour, ages, and is completed as a lamp. FIG. 1 is a sectional view of the completed lamp.
【００２１】完成したランプには、製作ロットＮｏ．を
印するが、本発明によるランプは、管径が小さいため
に、数字を印字することが出来ない。よって、図９に示
すように、ランプ５０の円周上に太さ、幅を変えた線を
印刷し、ロットがわかるようにする。また、線の色を変
えて印刷しても同様の効果がある。The completed lamp includes a production lot No. However, in the lamp according to the present invention, numbers cannot be printed because the tube diameter is small. Therefore, as shown in FIG. 9, a line having a different thickness and width is printed on the circumference of the lamp 50 so that the lot can be identified. The same effect can be obtained by changing the color of the line and printing.
【００２２】上記実施例においては、放電用ガスは、希
ガスと水銀の混合ガスであり、かつ電極は冷陰極であっ
たが、放電用ガスは希ガスだけでも良いことは自明のこ
とである。In the above embodiment, the discharge gas is a mixed gas of a rare gas and mercury, and the electrode is a cold cathode. However, it is obvious that the discharge gas may be a rare gas alone. .
【００２３】[0023]
【発明の効果】本発明の実施例によれば、高効率で、か
つ寿命が長い細径の蛍光ランプが得られる。According to the embodiment of the present invention, a small-diameter fluorescent lamp having high efficiency and long life can be obtained.
【図１】本発明の実施例に係る蛍光ランプの断面図であ
る。FIG. 1 is a sectional view of a fluorescent lamp according to an embodiment of the present invention.
【図２】本発明の実施例に係る蛍光ランプの製造方法の
説明図である。FIG. 2 is an explanatory diagram of a method for manufacturing a fluorescent lamp according to an embodiment of the present invention.
【図３】本発明の実施例に係る蛍光ランプの製造方法の
説明図である。FIG. 3 is an explanatory diagram of a method for manufacturing a fluorescent lamp according to an embodiment of the present invention.
【図４】本発明の実施例に係る蛍光ランプの製造方法の
説明図である。FIG. 4 is an explanatory diagram of a method for manufacturing a fluorescent lamp according to an embodiment of the present invention.
【図５】本発明の実施例に係る蛍光ランプの製造方法の
説明図である。FIG. 5 is an explanatory diagram of a method for manufacturing a fluorescent lamp according to an embodiment of the present invention.
【図６】本発明の実施例に係る蛍光ランプの製造方法の
説明図である。FIG. 6 is an explanatory diagram of a method for manufacturing a fluorescent lamp according to an embodiment of the present invention.
【図７】本発明の実施例に係る蛍光ランプの製造方法の
説明図である。FIG. 7 is an explanatory diagram of a method for manufacturing a fluorescent lamp according to an embodiment of the present invention.
【図８】本発明の実施例に係る蛍光ランプの製造方法の
説明図である。FIG. 8 is an explanatory diagram of a method for manufacturing a fluorescent lamp according to an example of the present invention.
【図９】本発明の実施例に係る蛍光ランプの一部分を示
す正面図である。FIG. 9 is a front view showing a part of the fluorescent lamp according to the embodiment of the present invention.
１００…蛍光ランプ、１０１…電極、１０２…蛍光体。 100: fluorescent lamp, 101: electrode, 102: phosphor.
フロントページの続き (72)発明者 小川 壮一郎 東京都青梅市藤橋888番地 株式会社日立 製作所青梅工場内Continuation of the front page (72) Inventor Soichiro Ogawa 888 Fujibashi, Ome-shi, Tokyo Inside the Ome Plant of Hitachi, Ltd.
Claims (1)
水銀粒を封入する工程を有することを特徴とする蛍光ラ
ンプの製造方法。1. A method of manufacturing a fluorescent lamp, comprising the step of sealing mercury particles in a discharge tube having a phosphor film formed on an inner surface thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP368599A JPH11250807A (en) | 1999-01-11 | 1999-01-11 | Fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP368599A JPH11250807A (en) | 1999-01-11 | 1999-01-11 | Fluorescent lamp |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21890890A Division JP3191934B2 (en) | 1990-08-22 | 1990-08-22 | Fluorescent lamp and method of manufacturing fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11250807A true JPH11250807A (en) | 1999-09-17 |
Family
ID=11564270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP368599A Pending JPH11250807A (en) | 1999-01-11 | 1999-01-11 | Fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11250807A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100896150B1 (en) * | 2008-06-13 | 2009-05-11 | 주식회사 에이디피엔지니어링 | Manufacturing apparatus of fluorescent lamp and manufacturing method of the fluorescent lamp |
| US7839069B2 (en) | 2006-02-22 | 2010-11-23 | Panasonic Corporation | Method for manufacturing direct backlight unit, fluorescent lamp and backlight unit |
| JP2013004527A (en) * | 2011-06-16 | 2013-01-07 | Mocon Inc | Gas discharge lamp with axially extending strip of getter and method of manufacturing the same |
| USD797984S1 (en) | 2016-03-24 | 2017-09-19 | Mocon, Inc. | UV lamp |
| US11037778B1 (en) | 2021-01-14 | 2021-06-15 | Mocon, Inc. | UV lamp |
-
1999
- 1999-01-11 JP JP368599A patent/JPH11250807A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7839069B2 (en) | 2006-02-22 | 2010-11-23 | Panasonic Corporation | Method for manufacturing direct backlight unit, fluorescent lamp and backlight unit |
| KR100896150B1 (en) * | 2008-06-13 | 2009-05-11 | 주식회사 에이디피엔지니어링 | Manufacturing apparatus of fluorescent lamp and manufacturing method of the fluorescent lamp |
| JP2013004527A (en) * | 2011-06-16 | 2013-01-07 | Mocon Inc | Gas discharge lamp with axially extending strip of getter and method of manufacturing the same |
| US9368338B2 (en) | 2011-06-16 | 2016-06-14 | Mocon, Inc. | Gas discharge lamp with an axially extending strip of getter and method of manufacture |
| USD797984S1 (en) | 2016-03-24 | 2017-09-19 | Mocon, Inc. | UV lamp |
| US11037778B1 (en) | 2021-01-14 | 2021-06-15 | Mocon, Inc. | UV lamp |
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