JP3389971B2 - Discharge tube - Google Patents
Discharge tubeInfo
- Publication number
- JP3389971B2 JP3389971B2 JP2000147592A JP2000147592A JP3389971B2 JP 3389971 B2 JP3389971 B2 JP 3389971B2 JP 2000147592 A JP2000147592 A JP 2000147592A JP 2000147592 A JP2000147592 A JP 2000147592A JP 3389971 B2 JP3389971 B2 JP 3389971B2
- Authority
- JP
- Japan
- Prior art keywords
- lead
- glass tube
- wire
- glass
- tube
- 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.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
- H01J61/366—Seals for leading-in conductors
-
- 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
- H01J61/09—Hollow cathodes
-
- 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
- H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
- H01J9/245—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps
- H01J9/247—Manufacture or joining of vessels, leading-in conductors or bases specially adapted for gas discharge tubes or lamps specially adapted for gas-discharge lamps
Landscapes
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一対の電極を備え
る放電管、特に、非発光領域を減少して、全長を短くで
きる放電管に属する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge tube provided with a pair of electrodes, and more particularly, to a discharge tube capable of reducing a non-light emitting region and shortening its overall length.
【０００２】[0002]
【従来の技術】希ガス及び水銀蒸気が充填されたガラス
管の内部に一対の電極が対向して配置され且つガラス管
の内壁に蛍光膜が被覆された冷陰極放電管は、従来から
液晶ディスプレイのバックライト用光源等として広く使
用されている。冷陰極放電管の一対の電極には導入線の
一端が接続され、導入線の他端はガラス管の両端から外
部に導出される。一対の電極間に電圧を印加すると、一
方の電極から電子が放出され、ガラス管内の水銀原子に
電子が衝突して紫外線を発生する。この紫外線は、ガラ
ス管の内壁に形成された蛍光膜で可視光線に波長変換さ
れる。2. Description of the Related Art A cold cathode discharge tube in which a pair of electrodes are arranged to face each other inside a glass tube filled with a rare gas and mercury vapor and a fluorescent film is coated on the inner wall of the glass tube has been conventionally used in a liquid crystal display. It is widely used as a light source for backlights. One end of the lead-in wire is connected to the pair of electrodes of the cold cathode discharge tube, and the other end of the lead-in wire is led out from both ends of the glass tube. When a voltage is applied between the pair of electrodes, electrons are emitted from one of the electrodes, and the electrons collide with mercury atoms in the glass tube to generate ultraviolet rays. The wavelength of this ultraviolet ray is converted into visible light by the fluorescent film formed on the inner wall of the glass tube.
【０００３】図３に示す従来の冷陰極放電管(40)は、第
１の導入線構成部材(14)と第２の導入線構成部材(15)と
を融着した導入線(11)及び導入線(11)に固着されたカッ
プ形状の電極(3)を備えた図４（ｃ）に示す電極組立体
(20)と、電極組立体(20)が両端に固定され且つ内部に放
電用ガスが充填されたガラス管(7)と、ガラス管(7)外で
導入線(11)の導出部(28)に接続された外部リード(8)
と、ガラス管(7)の内面(7a)に被覆され且つ電極(3)間の
放電により発生する紫外線の照射を受けて可視光線を放
出する蛍光膜(9)とを備える。導入線(11)は、導出部(2
8)と、ガラス管(7)内に形成された埋設部(29)と、導出
部(28)と埋設部(29)とを接続する結合部(16)とを備え
る。A conventional cold cathode discharge tube (40) shown in FIG. 3 has a lead-in wire (11) and a lead-in wire (11) formed by fusing a first lead-in wire constituent member (14) and a second lead-in wire constituent member (15). The electrode assembly shown in FIG. 4 (c), which comprises a cup-shaped electrode (3) fixed to the lead-in wire (11).
(20), a glass tube (7) in which the electrode assembly (20) is fixed at both ends and is filled with a discharge gas, and a lead-out portion (28) of the introduction wire (11) outside the glass tube (7). ) Connected to external lead (8)
And a fluorescent film (9) which covers the inner surface (7a) of the glass tube (7) and emits visible light upon being irradiated with ultraviolet rays generated by discharge between the electrodes (3). The lead-in line (11) is
8), an embedded part (29) formed in the glass tube (7), and a coupling part (16) connecting the lead-out part (28) and the embedded part (29).
【０００４】前記冷陰極放電管(40)を製造する際、最初
に、半田付け性に優れたニッケル製の第１の導入線構成
部材(14)とガラス融着性に優れたタングステン製の第２
の導入線構成部材(15)とを融着した図４（ａ）に示す導
入線(11)と、円筒状に形成されたガラスビーズ(2)と、
ニッケル製の電極(3)とを用意する。第１及び第２の導
入線構成部材(14, 15)の直径は実質的に等しい。次に、
図４（ｂ）に示すように、導入線(11)の第２の導入線構
成部材(15)をガラスビーズ(2)の孔(2a)に差し込み、突
出部(11a)をガラスビーズ(2)から突出させた状態で、ガ
ラスビーズ(2)を第２の導入線構成部材(15)に融着す
る。ガラスビーズ(2)の孔(2a)は、結合部(16)より径が
小さく且つ第２の導入線構成部材(15)より径が大きく構
成され、結合部(16)によってガラスビーズ(2)の融着位
置が設定される。その後、図４（ｃ）に示すように、突
出部(11a)の先端(11b)を電極(3)の外側底面(3a)に溶接
することにより電極組立体(20)が形成され、円筒状のガ
ラス管(7)の両端に電極組立体(20)を配置する。ガラス
管(7)内に希ガス及び水銀蒸気を含む放電用ガスを充填
した後、ガラスビーズ(2)をガラス管(7)に融着すると、
図４（ｄ）に示すように、電極(3)及び埋設部(29)がガ
ラス管(7)内に封止され、結合部(16)及び導出部(28)が
ガラス管(7)外に導出された状態となる。導出部(28)
は、適当な長さにカットされた後に外部リード(8)が半
田付けされ、図３に示す冷陰極放電管(40)が形成され
る。In manufacturing the cold cathode discharge tube (40), first, the first lead wire constituting member (14) made of nickel, which is excellent in solderability, and the first lead wire constituent member (14) made of tungsten, which is excellent in glass fusion property, are first prepared. Two
Introducing wire (11) shown in FIG. 4 (a) fused with the introductory wire constituting member (15), and glass beads (2) formed in a cylindrical shape,
Prepare an electrode (3) made of nickel. The diameters of the first and second lead wire components (14, 15) are substantially equal. next,
As shown in FIG. 4 (b), the second introduction line constituting member (15) of the introduction line (11) is inserted into the hole (2a) of the glass bead (2), and the protrusion (11a) is attached to the glass bead (2). ), The glass beads (2) are fused to the second introducing wire constituting member (15). The hole (2a) of the glass bead (2) has a diameter smaller than that of the joining portion (16) and larger than that of the second introducing wire constituting member (15), and the joining portion (16) allows the glass bead (2) to be formed. The fusion bonding position of is set. Then, as shown in FIG. 4 (c), the tip (11b) of the protrusion (11a) is welded to the outer bottom surface (3a) of the electrode (3) to form an electrode assembly (20), which has a cylindrical shape. The electrode assemblies (20) are arranged on both ends of the glass tube (7). After filling the glass tube (7) with a discharge gas containing a rare gas and mercury vapor, when the glass beads (2) are fused to the glass tube (7),
As shown in FIG. 4 (d), the electrode (3) and the embedded portion (29) are sealed in the glass tube (7), and the coupling portion (16) and the lead-out portion (28) are outside the glass tube (7). It will be in the state derived to. Derivation part (28)
After being cut to an appropriate length, the external leads (8) are soldered to form the cold cathode discharge tube (40) shown in FIG.
【０００５】[0005]
【発明が解決しようとする課題】前記冷陰極放電管(40)
では、第１及び第２の導入線構成部材(14, 15)が実質的
に等しい直径であるため、これらを融着すると図４
（ａ）に示すように、融けた金属のこぶが第１及び第２
の導入線構成部材(14, 15)の直径より大きく結合部(16)
に形成される。直径が約０.８mmのニッケルとタングス
テンの場合、図４（ａ）に示す結合部(16)の長さ(L)は
約０.６mmにもなる。このため、外部リード(8)を導出部
(28)に接続する際、図４（ｄ）に示すように、結合部(1
6)ではなく、ガラス管(7)及び結合部(16)から離間した
位置に外部リード(8)を半田付けしなければならず、冷
陰極放電管(40)の小型化を図ることができない。この結
合部(16)はいわば非発光領域であるため、結合部(16)が
大きいと発光効率が低下する。非発光領域を小さくする
ために、結合部(16)のこぶに外部リード(8)を半田付け
することも可能であるが、結合部(16)は曲面且つ不規則
な形状であり、しかもニッケルとタングステンとの融合
体のため半田付け性も悪く、外力により外部リード(8)
が外れ易い。従って、外部リード(8)と導出部(28)との
接続強度が十分に得られず接続不良の原因となる。[Problems to be Solved by the Invention] The cold cathode discharge tube (40)
Then, since the first and second introduction line constituting members (14, 15) have substantially the same diameter, when they are fused together as shown in FIG.
As shown in (a), the molten metal hump has first and second
Larger than the diameter of the lead-in wire components (14, 15) of the joint (16)
Is formed. In the case of nickel and tungsten having a diameter of about 0.8 mm, the length (L) of the joint portion (16) shown in FIG. 4 (a) is about 0.6 mm. For this reason, the external lead (8)
When connecting to (28), as shown in FIG.
It is not possible to downsize the cold cathode discharge tube (40) because it is necessary to solder the external lead (8) to a position apart from the glass tube (7) and the coupling portion (16) instead of 6). . Since this joint portion (16) is, so to speak, a non-luminous region, if the joint portion (16) is large, the luminous efficiency is reduced. It is possible to solder the external leads (8) to the bumps of the joint (16) in order to reduce the non-light emitting area, but the joint (16) has a curved surface and an irregular shape, and moreover nickel Solderability is poor due to the fusion of tungsten and tungsten, and external leads (8)
Is easy to come off. Therefore, the connection strength between the external lead (8) and the lead-out portion (28) cannot be sufficiently obtained, which causes a connection failure.
【０００６】そこで本発明は、非発光領域を小さくして
小型化を図る放電管を提供することを目的とする。ま
た、放電管と外部リードとの接続を強固にし接続不良を
防止する放電管を提供することを目的とする。[0006] Therefore, an object of the present invention is to provide a discharge tube in which the non-luminous region is made small to be miniaturized. Another object of the present invention is to provide a discharge tube that strengthens the connection between the discharge tube and the external lead and prevents connection failure.
【０００７】[0007]
【課題を解決するための手段】本発明による放電管は、
金属製の導入線(1)及び導入線(1)に固着された電極(3)
を備えた電極組立体(10)と、電極組立体(10)が両端に固
定され且つ内部に放電用ガスが充填されたガラス管(7)
と、ガラス管(7)の内面に被覆され且つ電極(3)間の放電
により発生する紫外線の照射を受けて可視光線を放出す
る蛍光膜(9)とを備えている。導入線(1)は、ガラス管
(7)の両端の外部に配置された導出部(18)と、導出部(1
8)より直径が小さく且つ電極(3)と共にガラス管(7)内に
封止された埋設部(19)とを備え、埋設部(19)は、導出部
(18)とは相違する材質により形成される。導出部(18)か
ら埋設部(19)に向かって径が小さくなるテーパ状の縮径
部(6)を埋設部(19)と導出部(18)との間に形成する。縮
径部(6)に係止するガラスビーズ(2)は、ガラス管(7)に
融着する。The discharge tube according to the present invention comprises:
Metal lead-in wire (1) and electrode (3) fixed to the lead-in wire (1)
An electrode assembly (10) provided with a glass tube (7) in which the electrode assembly (10) is fixed at both ends and is filled with a discharge gas.
And a fluorescent film (9) which is coated on the inner surface of the glass tube (7) and emits visible light upon irradiation with ultraviolet rays generated by discharge between the electrodes (3). Introductory line (1) is a glass tube
The lead-out portion (18) arranged outside both ends of (7) and the lead-out portion (1
8) having a smaller diameter and an embedded portion (19) sealed in the glass tube (7) together with the electrode (3), and the embedded portion (19) is a lead-out portion.
It is made of a material different from that of (18). A tapered diameter-reduced portion (6) whose diameter decreases from the lead-out portion (18) toward the embedded portion (19) is formed between the embedded portion (19) and the lead-out portion (18). The glass beads (2) locked to the reduced diameter portion (6) are fused to the glass tube (7).
【０００８】金属のこぶが縮径部(6)に形成されず、放
電管の全長を短縮化できる。即ち、導入線(1)にリード
線を接続するとき、ガラス管(7)に最も近接した位置に
形成された縮径部(6)に接続できるので、非発光領域を
小さくして十分な発光量を確保すると共に、放電管の小
型化を図ることができる。また、導入線(1)にリード線
を接続する際、リード線を強固且つ確実に縮径部(6)に
接続することができ、接続後にリード線と縮径部(6)と
の接続不良が発生しない。Metal bumps are not formed on the reduced diameter portion (6), and the total length of the discharge tube can be shortened. That is, when connecting the lead wire to the lead-in wire (1), since it can be connected to the reduced diameter portion (6) formed at the position closest to the glass tube (7), the non-light emitting area can be reduced and sufficient light emission can be achieved. The amount can be secured and the discharge tube can be downsized. Further, when connecting the lead wire to the lead-in wire (1), the lead wire can be firmly and reliably connected to the reduced diameter portion (6), and after the connection, the lead wire and the reduced diameter portion (6) have a poor connection. Does not occur.
【０００９】本発明の実施の形態では、導出部(18)は、
ニッケルから構成され、埋設部(19)は、タングステンか
ら構成され、縮径部(6)は、ニッケルとタングステンと
の混合金属となる。ガラス管(7)の外で導入線(1)に接続
された外部リード(8)を有し、外部リード(8)は導入線
(1)の導出部(18)又は縮径部(6)に固着される。In the embodiment of the present invention, the derivation unit (18) is
The buried portion (19) is made of nickel, the buried portion (19) is made of tungsten, and the reduced diameter portion (6) is made of a mixed metal of nickel and tungsten. Outside the glass tube (7) has an external lead (8) connected to the lead-in wire (1), the external lead (8) being the lead-in wire
It is fixed to the lead-out portion (18) or the reduced diameter portion (6) of (1).
【００１０】[0010]
【発明の実施の形態】以下、本発明による放電管の実施
の形態を図１より説明する。図１に示す本実施の形態に
よる冷陰極放電管(30)は、金属製の導入線(1)及び導入
線(1)に固着されたカップ形状の電極(3)を備えた電極組
立体(10)と、電極組立体(10)が両端に固定され且つ内部
に放電用ガスが充填されたガラス管(7)と、ガラス管(7)
外で導入線(1)に接続された外部リード(8)と、ガラス管
(7)の内面(7a)に被覆され且つ電極(3)間の放電により発
生する紫外線の照射を受けて可視光線を放出する蛍光膜
(9)とを備える。電極組立体(10)の金属製の導入線(1)に
は、円筒形状のガラスビーズ(2)が融着され、ガラスビ
ーズ(2)とガラス管(7)との接続により電極(3)がガラス
管(7)内に封止される。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a discharge tube according to the present invention will be described below with reference to FIG. A cold cathode discharge tube (30) according to the present embodiment shown in FIG. 1 includes an electrode assembly (1) made of metal and a cup-shaped electrode (3) fixed to the introduction wire (1) ( 10), a glass tube (7) in which the electrode assembly (10) is fixed at both ends and is filled with a discharge gas, and a glass tube (7)
External lead (8) externally connected to the lead-in wire (1) and glass tube
Fluorescent film coated on the inner surface (7a) of (7) and emitting visible light upon irradiation with ultraviolet rays generated by the discharge between the electrodes (3)
(9) and are provided. The metal introduction wire (1) of the electrode assembly (10) is fused with a cylindrical glass bead (2), and the electrode (3) is formed by connecting the glass bead (2) and the glass tube (7). Are sealed in the glass tube (7).
【００１１】本発明では、導入線(1)は、ガラス管(7)の
両端の外部に形成された導出部(18)と、導出部(18)より
直径が小さく且つ電極(3)と共にガラス管(7)内に封止さ
れた埋設部(19)とを備え、埋設部(19)に結合された縮径
部(6)及び導出部(18)にリード線である外部リード(8)が
接続される。このため、ガラス管(7)から離間させて外
部リード(8)を接続した図３に示す従来の冷陰極放電管
(40)と異なり、本実施の形態では冷陰極放電管(30)の全
長を短くできる。In the present invention, the lead-in wire (1) is made up of a lead-out portion (18) formed outside both ends of the glass tube (7) and a glass having a smaller diameter than the lead-out portion (18) and the electrode (3). An external lead (8), which is a lead wire, is provided with a buried portion (19) sealed in a pipe (7), and a reduced diameter portion (6) and a lead-out portion (18) coupled to the buried portion (19). Are connected. For this reason, the conventional cold cathode discharge tube shown in FIG. 3 in which the external leads (8) are connected apart from the glass tube (7).
Different from (40), in the present embodiment, the total length of the cold cathode discharge tube (30) can be shortened.
【００１２】導出部(18)と埋設部(19)との直径の差は
０.２〜３.０mmである。直径の差が０.２mm未満である
と、導出部(18)より直径の大きいこぶが縮径部(6)に形
成され、３.０mmを超えると、縮径部(6)のテーパ角度が
急斜になり、いずれも縮径部(6)と外部リード(8)との接
続性が低下する。The difference in diameter between the lead-out portion 18 and the buried portion 19 is 0.2 to 3.0 mm. If the difference in diameter is less than 0.2 mm, a hump having a diameter larger than that of the lead-out portion (18) is formed in the reduced diameter portion (6), and if it exceeds 3.0 mm, the taper angle of the reduced diameter portion (6) is increased. It becomes a steep slope, and in both cases, the connectivity between the reduced diameter portion (6) and the external lead (8) deteriorates.
【００１３】本実施の形態による冷陰極放電管(30)の製
造法は、最初に、ニッケル製の第１の導入線構成部材
(4)と、第１の導入線構成部材(4)より直径が小さいタン
グステン製の第２の導入線構成部材(5)とを融着して、
図２（ａ）に示す導入線(1)を形成する。In the method of manufacturing the cold cathode discharge tube (30) according to the present embodiment, first, the first lead wire constituting member made of nickel is formed.
(4) and the second lead-in wire constituent member (5) made of tungsten having a smaller diameter than the first lead-in wire constituent member (4) are fused,
The introduction line (1) shown in FIG. 2 (a) is formed.
【００１４】導入線(1)に対する外部リード(8)の接続は
半田付けにより行われるので、第１の導入線構成部材
(4)は半田付け性に優れたニッケルを使用する。また、
ガラスビーズ(2)が融着される第２の導入線構成部材(5)
は、ガラスとの融着性に優れたタングステンを使用す
る。このため、第１の導入線構成部材(4)と第２の導入
線構成部材(5)との接続箇所である縮径部(6)は、ニッケ
ルとタングステンとを混合した金属となるが、ニッケル
製の第１の導入線構成部材(4)はタングステン製の第２
の導入線構成部材(5)に比べ、直径が大きく且つ融点が
低いためニッケルを多く含む。縮径部(6)は、こぶが形
成されず、第１の導入線構成部材(4)から第２の導入線
構成部材(5)にかけて直径が徐々に小さくなるテーパ状
に形成される。直径は例えば、第１の導入線構成部材
(4)が約０.８mmであり、第２の導入線構成部材(5)が約
０.５mmである。Since the external lead (8) is connected to the lead-in wire (1) by soldering, the first lead-line forming member
For (4), nickel with excellent solderability is used. Also,
Second lead wire constituent member (5) to which glass beads (2) are fused
Uses tungsten, which has a good fusion property with glass. Therefore, the reduced diameter portion (6), which is the connection point between the first introduction line constituent member (4) and the second introduction line constituent member (5), is a metal in which nickel and tungsten are mixed, The first lead wire component (4) made of nickel is the second lead wire made of tungsten.
Since it has a large diameter and a low melting point, it contains a large amount of nickel as compared with the introduction wire constituting member (5). The reduced diameter portion (6) is formed in a taper shape in which a hump is not formed and the diameter gradually decreases from the first introduction line forming member (4) to the second introduction line forming member (5). The diameter is, for example, the first lead wire constituent member.
(4) is about 0.8 mm, and the second introduction line forming member (5) is about 0.5 mm.
【００１５】導入線(1)を第２の導入線構成部材(5)側か
らガラスビーズ(2)の孔(2a)に挿入して、図２（ｂ）に
示すように、導入線(1)の突出部(1a)をガラスビーズ(2)
から突出させる。尚、ガラスビーズ(2)を導入線(1)に挿
入するとき、導入線(1)を第１の導入線構成部材(4)が下
側になるように垂直に配置して、上方からガラスビーズ
(2)を挿入すると良い。ガラスビーズ(2)に形成された孔
(2a)の直径は、第１の導入線構成部材(4)の直径より小
さく、第２の導入線構成部材(5)の直径より若干大きい
ので、ガラスビーズ(2)は縮径部(6)で係止される。ガラ
スビーズ(2)は第２の導入線構成部材(5)より短いので、
ガラスビーズ(2)に導入線(1)を挿入したとき、第２の導
入線構成部材(5)がガラスビーズ(2)から若干突出して長
さ０.５〜３０mmの突出部(1a)を形成する。The lead-in wire (1) is inserted into the hole (2a) of the glass bead (2) from the side of the second lead-in wire constituting member (5), and as shown in FIG. ) The glass beads (2)
Project from. When the glass beads (2) are inserted into the introduction line (1), the introduction line (1) is vertically arranged so that the first introduction line constituent member (4) is on the lower side, and the glass is inserted from above. beads
Insert (2). Holes formed in glass beads (2)
Since the diameter of (2a) is smaller than the diameter of the first introduction line forming member (4) and slightly larger than the diameter of the second introduction line forming member (5), the glass beads (2) are reduced in diameter (6). ) Is locked. Since the glass beads (2) are shorter than the second lead wire constituent member (5),
When the introduction wire (1) is inserted into the glass beads (2), the second introduction wire constituent member (5) slightly protrudes from the glass beads (2) to form a protrusion (1a) having a length of 0.5 to 30 mm. Form.
【００１６】次に、図２（ｃ）に示すように、カップ状
に形成されたニッケル製の電極(3)の外側底面(3a)に突
出部(1a)の先端(1b)を溶接する。突出部(1a)の先端(1b)
と電極(3)の外側底面(3a)とを接触させ、この間に電流
を流して両者を溶接する。このとき、ガラスビーズ(2)
は導入線(1)に融着されていないので、溶接時に発生す
る熱がガラスビーズ(2)側に伝達しても、金属とガラス
との線膨張係数差に起因するクラックがガラスビーズ
(2)に生じない。このため、突出部(1a)の長さは、溶接
を良好に行うために必要となる最小限の長さだけ確保す
ればよく、ガラスビーズ(2)と導入線(1)とを融着後に電
極(3)を溶接する図４に示す従来法の突出部(11a)に比べ
て短く設定できる。例えば、ガラスビーズ(2)のクラッ
クを防止するため、従来の突出部(11a)の長さは最低で
も０.７mm程度必要であるのに対し、本実施の形態では
突出部(1a)の長さが約０.２mmに設定できる。導入線(1)
と電極(3)とを溶接することにより、ガラスビーズ(2)は
縮径部(6)と電極(3)との間に挟まれて、導入線(1)から
抜けることがない。その後、ガラスビーズ(2)を第２の
導入線構成部材(5)に融着して図２（ｄ）に示す導入線
(1)、ガラスビーズ(2)及び電極(3)が一体に固着された
電極組立体(10)を形成する。Next, as shown in FIG. 2 (c), the tip (1b) of the projection (1a) is welded to the outer bottom surface (3a) of the cup-shaped nickel electrode (3). Tip (1b) of protrusion (1a)
And the outer bottom surface (3a) of the electrode (3) are brought into contact with each other, and an electric current is passed between them to weld the both. At this time, glass beads (2)
Since it is not fused to the introduction line (1), even if the heat generated during welding is transferred to the glass beads (2) side, cracks due to the difference in linear expansion coefficient between metal and glass
It does not occur in (2). Therefore, the length of the protruding portion (1a), it is sufficient to ensure only the minimum length required to perform good welding, after fusion of the glass beads (2) and the introduction line (1). It can be set shorter than the protrusion (11a) of the conventional method shown in FIG. 4 for welding the electrode (3). For example, in order to prevent the glass beads (2) from cracking, the length of the conventional protrusion (11a) needs to be at least about 0.7 mm, whereas in the present embodiment, the length of the protrusion (1a) is required. Can be set to about 0.2 mm. Lead-in line (1)
The glass beads (2) are sandwiched between the reduced diameter portion (6) and the electrode (3) by welding the electrode (3) and the electrode (3), and the glass beads (2) do not come off from the lead-in wire (1). After that, the glass beads (2) are fused to the second introducing line constituting member (5) and the introducing line shown in FIG.
(1), the glass beads (2) and the electrode (3) are integrally fixed to each other to form an electrode assembly (10).
【００１７】電極組立体(10)は、内面(7a)に蛍光膜(9)
が被覆された円筒状のガラス管(7)内に配置される。電
極組立体(10)は、密閉可能なチャンバ（容器）内にガラ
ス管(7)が挿入された状態で、電極(3)をそれぞれ内側に
向けてガラス管(7)の両端に同軸上に配置される。その
後、チャンバを密閉し、ネオンガス、アルゴンガス及び
キセノンガスの１種又は２種以上の希ガスと、水銀蒸気
等の金属蒸気とからなる放電用ガスを５.３〜１３kPa程
度の圧力でガラス管(7)内に充填する。放電用ガスが充
填されたガラス管(7)の両端及びガラスビーズ(2)をチャ
ンバ内に設けられた電気炉等で加熱して、ガラスビーズ
(2)をガラス管(7)に融着することにより、ガラス管(7)
の両端を閉塞する。これにより、電極(3)をガラス管(7)
内に封止すると共に、導入線(1)の埋設部(19)をガラス
管(7)内に形成する。また、縮径部(6)及び導出部(18)を
ガラス管(7)外に形成するが、図２（ｅ）に示すよう
に、縮径部(6)はガラス管(7)に埋設した部分を有し、埋
設長(A)が０.５mm以下である。The electrode assembly (10) has a fluorescent film (9) on the inner surface (7a).
Are placed in a coated cylindrical glass tube (7). The electrode assembly (10) is coaxial with both ends of the glass tube (7) with the electrodes (3) facing inward with the glass tube (7) inserted in a chamber (container) that can be sealed. Will be placed. After that, the chamber is closed, and a discharge gas consisting of one or more rare gases of neon gas, argon gas, and xenon gas, and metal vapor such as mercury vapor is applied to the glass tube at a pressure of about 5.3 to 13 kPa. Fill in (7). Both ends of the glass tube (7) filled with the discharge gas and the glass beads (2) are heated in an electric furnace or the like provided in the chamber, and the glass beads are heated.
By fusing (2) to the glass tube (7), the glass tube (7)
Close both ends of. This allows the electrode (3) to pass through the glass tube (7).
While being sealed inside, the embedded portion (19) of the lead-in wire (1) is formed in the glass tube (7). Further, although the reduced diameter portion (6) and the lead-out portion (18) are formed outside the glass tube (7), the reduced diameter portion (6) is embedded in the glass tube (7) as shown in FIG. 2 (e). The buried length (A) is 0.5 mm or less.
【００１８】最後に、ガラス管(7)外に配置された導出
部(18)の先端側をカットした後、導出部(18)及び縮径部
(6)に外部リード(8)を半田付けする。外部リード(8)を
ガラス管(7)に近接した縮径部(6)に接続できるので、冷
陰極放電管(30)の全長を短くできる。Finally, after cutting the leading end side of the lead-out portion (18) arranged outside the glass tube (7), the lead-out portion (18) and the reduced diameter portion
Solder the external lead (8) to (6). Since the external lead (8) can be connected to the reduced diameter portion (6) close to the glass tube (7), the total length of the cold cathode discharge tube (30) can be shortened.
【００１９】[0019]
【発明の効果】前記のように本発明では、放電管の小型
化を図ることができると共に、放電管と外部リードとの
接続不良を防止して放電管の強度及び耐久性を向上でき
る。As described above, according to the present invention, it is possible to reduce the size of the discharge tube and prevent the connection failure between the discharge tube and the external lead to improve the strength and durability of the discharge tube.
【図１】 本発明による放電管の実施の形態を示す断面
図FIG. 1 is a sectional view showing an embodiment of a discharge tube according to the present invention.
【図２】 本発明による放電管の製造法を示す断面図FIG. 2 is a sectional view showing a method of manufacturing a discharge tube according to the present invention.
【図３】 従来の放電管の実施の形態を示す断面図FIG. 3 is a sectional view showing an embodiment of a conventional discharge tube.
【図４】 従来の放電管の製造法を示す断面図FIG. 4 is a sectional view showing a conventional method of manufacturing a discharge tube.
(1)・・導入線、 (1a)・・突出部、 (1b)・・先端、
(2)・・ガラスビーズ、(2a)・・孔、 (3)・・電極、
(3a)・・外側底面、 (4)・・第１の導入線構成部材、
(5)・・第２の導入線構成部材、 (6)・・縮径部、
(7)・・ガラス管、 (7a)・・内面、 (8)・・外部リー
ド、 (9)・・蛍光膜、 (10)・・電極組立体、 (18)
・・導出部、 (19)・・埋設部、 (30)・・冷陰極放電
管、 (A)・・埋設長、(1) ・ ・ Introduction line, (1a) ・ ・ Projection part, (1b) ・ ・ Tip,
(2) ・ ・ Glass beads, (2a) ・ ・ Hole, (3) ・ ・ Electrode,
(3a) ... Outer bottom surface, (4) .. First lead wire component member,
(5) ・ ・ Second lead wire component, (6) ・ ・ Reduced diameter part,
(7) ・ ・ Glass tube, (7a) ・ ・ Inner surface, (8) ・ ・ External lead, (9) ・ ・ Fluorescent film, (10) ・ ・ Electrode assembly, (18)
・ ・ Leading part, (19) ・ ・ Buried part, (30) ・ ・ Cold cathode discharge tube, (A) ・ ・ Buried length,
Claims (3)
た電極を備えた電極組立体と、該電極組立体が両端に固
定され且つ内部に放電用ガスが充填されたガラス管と、
該ガラス管の内面に被覆され且つ前記電極間の放電によ
り発生する紫外線の照射を受けて可視光線を放出する蛍
光膜とを備え、前記導入線は、前記ガラス管の両端の外
部に配置された導出部と、該導出部より直径が小さく且
つ前記電極と共に前記ガラス管内に封止された埋設部と
を備え、前記埋設部は、前記導出部とは相違する材質に
より形成された放電管において、 前記導出部から前記埋設部に向かって径が小さくなるテ
ーパ状の縮径部を前記埋設部と前記導出部との間に形成
し、 前記縮径部に係止するガラスビーズは、前記ガラス管に
融着することを特徴とする放電管。1. An electrode assembly comprising a metal lead wire and electrodes fixed to the lead wire; a glass tube having the electrode assembly fixed at both ends and filled with a discharge gas;
A fluorescent film which is coated on the inner surface of the glass tube and emits visible light upon being irradiated with ultraviolet rays generated by the discharge between the electrodes, and the introduction line is arranged outside both ends of the glass tube. A lead-out portion and a buried portion that has a diameter smaller than that of the lead-out portion and is sealed in the glass tube together with the electrode, wherein the buried portion is a discharge tube formed of a material different from that of the lead-out portion, The glass beads that form a tapered diameter-reduced portion having a diameter that decreases from the lead-out portion toward the embedded portion between the embedded portion and the lead-out portion and lock the reduced diameter portion are the glass tube. Discharge tube characterized by being fused to.
前記埋設部は、タングステンから構成され、前記縮径部
は、ニッケルとタングステンとの混合金属となる請求項
１に記載の放電管。2. The lead-out portion is made of nickel,
The discharge tube according to claim 1, wherein the buried portion is made of tungsten, and the reduced diameter portion is made of a mixed metal of nickel and tungsten.
れた外部リードを有し、該外部リードは前記導入線の導
出部又は縮径部に固着された請求項１又は２のいずれか
に記載の放電管。3. An outer lead connected to the lead wire outside the glass tube, the outer lead being fixed to a lead-out portion or a reduced diameter portion of the lead wire. The discharge tube described in.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000147592A JP3389971B2 (en) | 2000-05-19 | 2000-05-19 | Discharge tube |
| TW090111978A TW594832B (en) | 2000-05-19 | 2001-05-18 | Discharge tube |
| KR10-2001-0027213A KR100537571B1 (en) | 2000-05-19 | 2001-05-18 | Discharge tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000147592A JP3389971B2 (en) | 2000-05-19 | 2000-05-19 | Discharge tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001325915A JP2001325915A (en) | 2001-11-22 |
| JP3389971B2 true JP3389971B2 (en) | 2003-03-24 |
Family
ID=18653755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000147592A Expired - Fee Related JP3389971B2 (en) | 2000-05-19 | 2000-05-19 | Discharge tube |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3389971B2 (en) |
| KR (1) | KR100537571B1 (en) |
| TW (1) | TW594832B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100457438B1 (en) * | 2002-03-20 | 2004-11-16 | 정은수 | Fluorescent lamp without discharging electrons |
| TW200405383A (en) | 2002-07-19 | 2004-04-01 | Matsushita Electric Ind Co Ltd | Low-voltage discharge lamp and backlight device using the same |
| DE102007021384A1 (en) | 2007-05-04 | 2008-11-13 | Neon Products Lichttechnik Gmbh | Electrode for high-voltage fluorescent tube, has cup-like or tubular electrode body partially carrying electron emitter material, and partially formed from wire gauze, where wire gauze is made of soft iron |
| US11923185B2 (en) * | 2021-06-16 | 2024-03-05 | Kla Corporation | Method of fabricating a high-pressure laser-sustained-plasma lamp |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06203800A (en) * | 1992-12-25 | 1994-07-22 | Ushio Inc | Small sized fluorescent lamp |
| JPH0730482U (en) * | 1993-11-10 | 1995-06-06 | ウシオ電機株式会社 | Small fluorescent tube device |
-
2000
- 2000-05-19 JP JP2000147592A patent/JP3389971B2/en not_active Expired - Fee Related
-
2001
- 2001-05-18 KR KR10-2001-0027213A patent/KR100537571B1/en not_active IP Right Cessation
- 2001-05-18 TW TW090111978A patent/TW594832B/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001325915A (en) | 2001-11-22 |
| KR100537571B1 (en) | 2005-12-19 |
| TW594832B (en) | 2004-06-21 |
| KR20010106271A (en) | 2001-11-29 |
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