JPH0442775B2 - - Google Patents
Info
- Publication number
- JPH0442775B2 JPH0442775B2 JP27613585A JP27613585A JPH0442775B2 JP H0442775 B2 JPH0442775 B2 JP H0442775B2 JP 27613585 A JP27613585 A JP 27613585A JP 27613585 A JP27613585 A JP 27613585A JP H0442775 B2 JPH0442775 B2 JP H0442775B2
- Authority
- JP
- Japan
- Prior art keywords
- envelope
- sealing material
- display tube
- exhaust hole
- sealing
- 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
Links
- 239000003566 sealing material Substances 0.000 claims description 39
- 238000007789 sealing Methods 0.000 claims description 17
- 239000000758 substrate Substances 0.000 description 14
- 239000011521 glass Substances 0.000 description 13
- 239000007789 gas Substances 0.000 description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 238000005219 brazing Methods 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000010408 film Substances 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、特定の雰囲気中で封止することによ
り内部に特定の雰囲気が形成された排気管のない
チツプレス表示管の外囲器に係り、特に封止時に
おける、排気孔に対する封着材の被着位置の関係
を規制した表示管の外囲器に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an envelope for a chitpress display tube without an exhaust pipe, in which a specific atmosphere is formed inside by sealing in a specific atmosphere. In particular, the present invention relates to an envelope for a display tube that regulates the relationship between the position of the sealing material and the exhaust hole during sealing.
以下、内部に特定の雰囲気が形成される表示管
の一例として蛍光表示管を用いて本発明を説明す
る。
The present invention will be described below using a fluorescent display tube as an example of a display tube in which a specific atmosphere is formed.
蛍光表示管は、電子を放出する陰極と、導体上
に蛍光体の配設された陽極と、陰極から放出され
た電子を加速したり、加速制御する制御電極等が
外囲器内に配設され、かつ外囲器内部が１×10-5
〜１×10-7Torr程度の高真空雰囲気に保持され
ている。一般に蛍光表示管の外囲器は、内部を高
真空雰囲気にするために、外囲器の排気孔にガラ
ス管による排気管が植設されている。そして、こ
の排気管より、外囲器内部の気体を吸引排気し外
囲器内が高真空状態になつた時点で排気管を溶融
封止していた。 A fluorescent display tube consists of a cathode that emits electrons, an anode with phosphor disposed on a conductor, and a control electrode that accelerates or controls the acceleration of the electrons emitted from the cathode, all arranged inside the envelope. and the inside of the envelope is 1×10 -5
It is maintained in a high vacuum atmosphere of ~1×10 -7 Torr. Generally, in the envelope of a fluorescent display tube, an exhaust pipe made of a glass tube is installed in the exhaust hole of the envelope in order to create a high vacuum atmosphere inside the envelope. Then, the gas inside the envelope is sucked and exhausted through this exhaust pipe, and when the inside of the envelope reaches a high vacuum state, the exhaust pipe is melt-sealed.
ところが、排気封止後の排気管が外囲器より突
出しているため、蛍光表示管を実装するにあた
り、スペースフアクターが悪いというばかりでな
く、排気管の材料がガラス管であることから耐衝
撃性が弱いという問題点を有する。 However, since the exhaust pipe after exhaust sealing protrudes from the envelope, it not only causes a bad space factor when mounting a fluorescent display tube, but also has poor impact resistance because the exhaust pipe is made of glass. It has the problem of being weak.
そのため、排気管のない、いわゆるチツプレス
の蛍光表示管が要求されている。 Therefore, a so-called chipless fluorescent display tube without an exhaust pipe is required.
そこで、従来チツプレス構造の蛍光表示管の外
囲器として、第３図に示す構成の外囲器が実公昭
58−10291号公報で公知である。すなわち、従来
の外囲器は、外囲器を構成するガラス基板Ａに、
貫通孔Ｂを形成し、この貫通孔Ｂの内面にフリツ
トガラスＣによりセラミツク部材Ｄを固着させ、
このセラミツク部材Ｄには貫通孔Ｂとほぼ同軸状
に小経の透孔Ｅを設けると共に、透孔Ｅの内側面
と透孔Ｅの周辺の前記貫通孔Ｂから露出した部分
のセラミツク部材Ｄの表面に、メタライズ層Ｆを
形成し、前記透孔Ｅ周縁にろう材Ｇを配置して外
囲器内を排気した後に、前記透孔Ｅ近傍を加熱処
理してろう材Ｇを溶融することで、外囲器を密封
封着する構成となつている。 Therefore, as an envelope for a fluorescent display tube with a conventional chit-press structure, an envelope having the structure shown in Fig. 3 was used.
It is known from the publication No. 58-10291. That is, in the conventional envelope, the glass substrate A constituting the envelope is
A through hole B is formed, and a ceramic member D is fixed to the inner surface of the through hole B with fritted glass C.
This ceramic member D is provided with a small-diameter through-hole E approximately coaxial with the through-hole B, and the inner surface of the through-hole E and the portion of the ceramic member D exposed from the through-hole B around the through-hole E are A metallized layer F is formed on the surface, a brazing material G is placed around the periphery of the through hole E, and the inside of the envelope is evacuated, and then the vicinity of the through hole E is heated to melt the brazing material G. , the envelope is hermetically sealed.
また、このほか、チツプレス構造の蛍光表示管
の外囲器として、第４図に示す構成の外囲器も知
られている。 In addition, as an envelope for a fluorescent display tube having a chisel press structure, an envelope having the structure shown in FIG. 4 is also known.
図中１は、外囲器の一部を形成するガラス基板
で、上面には、陽極導体２、絶縁層３よび蛍光体
４が順次積層配設されている。ここで陽極導体２
はAl薄膜をストライプ状に形成したり、透明導
電膜などの透光性材料で形成され、基板１側から
蛍光表示管の発光を観察できるようになつてい
る。 In the figure, reference numeral 1 denotes a glass substrate forming a part of the envelope, on the upper surface of which an anode conductor 2, an insulating layer 3, and a phosphor 4 are sequentially laminated. Here, the anode conductor 2
is formed by forming an Al thin film in a striped shape or from a light-transmitting material such as a transparent conductive film, so that the light emitted from the fluorescent display tube can be observed from the substrate 1 side.
さらに基板１上には、熱電子を放出するフイラ
メント状陰極５が張設されている。また、フイラ
メント状陰極５と基板１間には、制御電極６が配
設され、フイラメント状陰極５から放出された電
子を加速あるいは加速制御して蛍光体４に射突さ
せ、所望の発光表示を得るものである。 Furthermore, a filament-shaped cathode 5 that emits thermoelectrons is stretched over the substrate 1 . Further, a control electrode 6 is disposed between the filament-shaped cathode 5 and the substrate 1, and accelerates or controls the acceleration of electrons emitted from the filament-shaped cathode 5 to make them strike the phosphor 4, thereby producing a desired light-emitting display. It's something you get.
一方、上面板７及び側面板８は、前記基板１と
共に外囲器を形成するもので、それぞれ低融点フ
リツトガラス等からなる封着材１１により一体に
形成されている。また、上面板７には、排気孔７
ａが形成されている。そして図示しないが真空排
気装置内に蛍光表示を設置して、所定の真空度に
保ち、前記排気孔７ａから外囲器内を排気する。
また、封着にあたつては、外囲器全体を加熱し、
十分ベーキングした後、あらかじめ低融点フリツ
トガラス等の封着材９を被着させ、大気中で仮焼
成した蓋部材１０を前記排気孔７ａ周辺に圧接す
るとともに、蓋部材１０加熱し、封着材９を溶解
させて排気孔７ａを封止するものである。 On the other hand, the top plate 7 and the side plate 8 form an envelope together with the substrate 1, and are each integrally formed with a sealing material 11 made of low melting point frit glass or the like. In addition, the top plate 7 has an exhaust hole 7.
a is formed. Although not shown, a fluorescent display is installed in the evacuation device to maintain a predetermined degree of vacuum, and the inside of the envelope is evacuated through the evacuation hole 7a.
In addition, when sealing, the entire envelope is heated,
After sufficient baking, a sealing material 9 such as low-melting point fritted glass is applied in advance and a lid member 10, which has been pre-baked in the atmosphere, is pressed around the exhaust hole 7a, and the lid member 10 is heated to seal the sealing material 9. The exhaust hole 7a is sealed by dissolving it.
しかしながら、前記実公昭58−10291号公報に
示す外囲器では、難加工材であるセラミツク部材
Ｄに透孔Ｅを形成したり、特定の雰囲気内で外囲
器の内側からセラミツク部材Ｄをガラス板Ａの貫
通孔Ｂに固着するなど構造が複雑で、製作に手間
がかかる。また、基板Ａに設けた透孔Ｅ内にろう
材Ｇを溶融して充填しているので、ろう材Ｇが溶
融するときに発生する金属蒸気や有機フラツクス
の分解ガス等が蛍光表示管の場合陰極に吸着し、
シンターリングをおこし、陰極の電子放出能力を
低下させるばかりでなく、外囲器内の真空度を下
げ、かつ蛍光体表面を汚染して蛍光表示管の表示
特性を著しく低下させるおそれがある。
However, in the envelope shown in the above-mentioned Japanese Utility Model Publication No. 58-10291, a through hole E is formed in the ceramic member D, which is a difficult-to-process material, and the ceramic member D is inserted into the glass from inside the envelope in a specific atmosphere. The structure is complicated, as it is fixed to the through hole B of plate A, and it takes time and effort to manufacture. In addition, since the brazing material G is melted and filled into the through hole E provided in the substrate A, the metal vapor and decomposition gas of organic flux generated when the brazing material G is melted can be used in fluorescent display tubes. adsorbed to the cathode,
This not only causes sintering and reduces the electron emission ability of the cathode, but also reduces the degree of vacuum within the envelope and contaminates the surface of the phosphor, which may significantly deteriorate the display characteristics of the fluorescent display tube.
さらに、第４図に示す従来例でも、製造工程は
簡略化されるが、封着時における封着材９の排気
孔７ａに対する位置関係が明確でなく、封着材９
が排気孔７ａに流入すると、実公昭58−10291号
公報の外囲器同様封着材９な分解ガス等が矢印ａ
で示すように陰極に吸着し、陰極の電子放出能力
を低下させたり、蛍光体表面を汚染して蛍光表示
管の表示特性を低下させる恐れがある。 Furthermore, in the conventional example shown in FIG. 4, although the manufacturing process is simplified, the positional relationship of the sealing material 9 with respect to the exhaust hole 7a during sealing is not clear, and
When the gas flows into the exhaust hole 7a, the decomposition gas, etc. of the sealing material 9, as in the envelope of Publication of Utility Model Publication No. 58-10291, flows through the arrow a.
As shown in , there is a risk that it will be adsorbed to the cathode, reducing the electron emission ability of the cathode, or contaminating the surface of the phosphor, thereby deteriorating the display characteristics of the fluorescent display tube.
本発明は、上述した問題点に鑑みてなされたも
のであり、蛍光表示管などの表示管の外囲器にお
いて、封止時における排気孔に対する封着材の配
設位置を規制し、封着材から放出される分解ガス
が、できるかぎり、外囲器内部の材料に付着しな
いようにして封着材から放出される分解ガスによ
つて表示管の表示特性の低下を防止することを目
的とする。
The present invention has been made in view of the above-mentioned problems, and the present invention regulates the placement position of the sealing material with respect to the exhaust hole during sealing in the envelope of a display tube such as a fluorescent display tube. The purpose is to prevent the decomposition gas emitted from the sealing material from adhering to the material inside the envelope as much as possible, thereby preventing deterioration of the display characteristics of the display tube due to the decomposition gas emitted from the sealing material. do.
そこで、上述した目的を達成するために本発明
の表示管外囲器の構成は、特定の雰囲気中で、外
囲器の一部に設けられた排気孔を、封着材を介し
て平板状蓋部材で封止することにより、内部に特
定の雰囲気が形成された表示管の外囲器におい
て、封着時における封着材の厚みｈと、この封着
材の前記排気孔端部からの配設位置ｌと、前記排
気孔の直径ｄおよび前記外囲器の厚みｔとの関係
がｌ≧（ｄ／ｔ）ｈとなるように、封着材の配設
位置を排気孔の端部から一定距離以上離間したこ
とを特徴とするものである。 Therefore, in order to achieve the above-mentioned object, the configuration of the display tube envelope of the present invention is such that, in a specific atmosphere, an exhaust hole provided in a part of the envelope is connected to a flat plate through a sealing material. In a display tube envelope in which a specific atmosphere is formed inside by sealing with a lid member, the thickness h of the sealing material at the time of sealing and the thickness h of the sealing material from the end of the exhaust hole are determined. The sealing material is arranged at the end of the exhaust hole so that the relationship between the arrangement position l and the diameter d of the exhaust hole and the thickness t of the envelope is l≧(d/t)h. It is characterized by being separated by a certain distance or more from.
以下図面を用いて本発明を詳細に説明する。 The present invention will be explained in detail below using the drawings.
第１図は、本発明の表示管の外囲器の一例を示
したもので、蛍光表示管の外囲器に適用した例で
ある。図中２１はガラス板等の透光性材料からな
り、外囲器の一部を形成する基板で、この基板２
１上面には、Al薄膜をストライプ状に形成した
り、あるいは透明導電膜等の透光性材料からなる
陽極導体２２、絶縁層２３および蛍光体２４が順
次積層配設されている。そして基板２１および陽
極導体２２を透光性材料で形成することにより、
基板２１側から発光を観察できるようになつてい
る。 FIG. 1 shows an example of a display tube envelope according to the present invention, and is an example in which the present invention is applied to a fluorescent display tube envelope. In the figure, reference numeral 21 denotes a substrate made of a transparent material such as a glass plate and forming a part of the envelope.
1, an anode conductor 22 made of a light-transmitting material such as a thin Al film formed in stripes or a transparent conductive film, an insulating layer 23, and a phosphor 24 are sequentially laminated. By forming the substrate 21 and the anode conductor 22 from a transparent material,
Light emission can be observed from the substrate 21 side.
さらに基板２１上には、熱電子を放出するフイ
ラメント状陰極２５が張設されている。そしてこ
のフイラメント状陰極２５と基板２１間には、制
御電極２６が配設され、、フイラメント状陰極２
５から放出された電子を加速あるいは加速制御し
て、蛍光体２４に射突させ、所望の発光表示を得
るものである。 Furthermore, a filament-shaped cathode 25 that emits thermoelectrons is stretched over the substrate 21 . A control electrode 26 is disposed between the filament cathode 25 and the substrate 21.
The electrons emitted from the phosphor 5 are accelerated or controlled to be accelerated so as to strike the phosphor 24, thereby obtaining a desired luminescent display.
一方、上面板２７及び側面板２８、前記基板２
１とともに外囲器を形成するもので、低融点フリ
ツトガラス等からなる封着材３１により一体に形
成されている。また、上面板２７には、排気孔２
７ａが形成されている。そして第４図に示す従来
例同様に、真空排気装置内に蛍光表示管を配置し
て排気孔２７ａから外囲器内を排気した後、低融
点フリツトガラス等の封着材２９をあらかじめ蓋
部材３０に被着し、仮焼成したものを、蓋部材３
０ごと前記排気孔２７ａへ圧接加熱し、封着材２
９を溶解させて排気孔２７ａを封止するものであ
る。 On the other hand, the top plate 27, the side plate 28, the substrate 2
1 forms an envelope, and is integrally formed with a sealing material 31 made of low melting point fritted glass or the like. In addition, the top plate 27 has an exhaust hole 2.
7a is formed. Similar to the conventional example shown in FIG. 4, after arranging the fluorescent display tube in the vacuum evacuation device and evacuating the inside of the envelope from the exhaust hole 27a, a sealing material 29 such as low melting point frit glass is applied to the lid member 30 in advance. The lid member 3 is coated and pre-fired.
0 is pressed and heated to the exhaust hole 27a, and the sealing material 2
9 is dissolved to seal the exhaust hole 27a.
ここで蓋部材３０は、平板状で付着強度を十分
にとれるだけの大きさがあれば、円形、方形など
どのような形状でもよい。また、蓋部材３０の材
質は、上面板２７と熱膨張率のほぼ等しいもの
で、封着材３１を介して上面板２７と気密性およ
び接合強度が十分とれるものであれば、金属板、
ガラス板、セラミツク板などが使用できる。しか
し、強度的には金属板が優れ、蓋部材３０を金属
板で形成すると、その厚みをほとんど無視するこ
とができ、スペースフアクター的には最も優れて
いる。例えば封着材３１が低融点フリツトガラス
であれば蓋部材３０には、426合金（42％Ni、６
％Cr、残部Fe）などが好適である。 Here, the lid member 30 may have any shape, such as circular or rectangular, as long as it is flat and large enough to provide sufficient adhesion strength. The material of the lid member 30 may be a metal plate, as long as it has almost the same coefficient of thermal expansion as the top plate 27 and has sufficient airtightness and bonding strength with the top plate 27 via the sealing material 31.
Glass plates, ceramic plates, etc. can be used. However, a metal plate is superior in terms of strength, and if the lid member 30 is formed of a metal plate, its thickness can be almost ignored, and it is the best in terms of space factor. For example, if the sealing material 31 is low-melting frit glass, the lid member 30 is made of 426 alloy (42% Ni, 6% Ni).
%Cr, balance Fe), etc. are suitable.
ところで、封着時における封着材２９は、外囲
器内部から見ると、排気孔２７ａの上下端によつ
て、封着材２９を直接見ることのできない位置に
配設されている。すなわち、封着時における封着
材２９の厚みｈと、排気孔２７ａ端部から封着材
２９の内側壁までの距離ｌと、排気孔２７ａの直
径ｄおよび前記上面板２７の厚みｔとの関係が、
ｌ≧（ｄ／ｔ）ｈとなるように、前記封着材２９
を排気孔２７ａの端部から離間した位置に被着さ
せた構成である。一般に、封着材２９の厚みｈ
は、蓋部材３０の上面板２７に対する剥離強度と
気密性を考慮すると排気孔２７ａの直径ｄおよび
上面板２７の厚みｔに関係なく、20μｍ〜200μｍ
程度である。そのため、上面板２７の厚みｔが
２mmで、排気孔２７ａの直径ｄが３mm（通常の蛍
光表示管の場合）であれば、排気孔２７ａの端部
から封着材２９の内側壁までの距離ｌは、ｌ≧
30μｍ〜300μｍとなる。但し、あまり前記距離ｌ
を大きくすると、封着材２９の封着部内径が大き
くなり、外囲器内への封着材２９の露出面積が増
加し、分解ガス、蒸発物質の外囲器内への放出量
も増加する。また、剥離強度の問題から蓋部材３
０が必要以上に大きくなる。そのため前記距離ｌ
は、ｌ≧（ｄ／ｔ）ｈの関係式が成立するぎりぎ
りの値が好ましい。 By the way, the sealing material 29 during sealing is disposed at a position where the sealing material 29 cannot be directly seen when viewed from inside the envelope due to the upper and lower ends of the exhaust hole 27a. That is, the thickness h of the sealing material 29 during sealing, the distance l from the end of the exhaust hole 27a to the inner wall of the sealing material 29, the diameter d of the exhaust hole 27a, and the thickness t of the top plate 27. The relationship is
The sealing material 29 is adjusted such that l≧(d/t)h.
This is a structure in which the exhaust hole 27a is attached at a position spaced apart from the end of the exhaust hole 27a. Generally, the thickness h of the sealing material 29
is 20 μm to 200 μm, regardless of the diameter d of the exhaust hole 27a and the thickness t of the top plate 27, considering the peel strength and airtightness of the lid member 30 against the top plate 27.
That's about it. Therefore, if the thickness t of the top plate 27 is 2 mm and the diameter d of the exhaust hole 27a is 3 mm (in the case of a normal fluorescent display tube), then the distance from the end of the exhaust hole 27a to the inner wall of the sealing material 29 is l is l≧
It is 30 μm to 300 μm. However, the distance l
When , the inner diameter of the sealing part of the sealing material 29 increases, the exposed area of the sealing material 29 into the envelope increases, and the amount of decomposed gas and evaporated substances released into the envelope also increases. do. In addition, due to peel strength issues, the lid member 3
0 becomes larger than necessary. Therefore, the distance l
is preferably a value that satisfies the relational expression l≧(d/t)h.
したがつて、実施例の蛍光表示管においては、
第１図の矢印ｂで示すように、封着材２９から封
着時に放出される分解ガスや蒸発物質は、排気孔
２７ａの壁面に遮えぎられて、直接外囲器内部に
流入することはない。そして外囲器内部に流入す
る分解ガスや蒸発物質は、蓋部材３０内面や排気
孔２７ａの壁面で複数回の反射をくり返して回り
込んで流入したものに限定されて極めて少なくな
る。 Therefore, in the fluorescent display tube of the example,
As shown by arrow b in FIG. 1, the decomposed gas and evaporated substances released from the sealing material 29 during sealing are blocked by the wall surface of the exhaust hole 27a and flow directly into the envelope. There isn't. The amount of decomposed gas and evaporated substances flowing into the envelope is limited to those that have been reflected multiple times on the inner surface of the lid member 30 and the wall surface of the exhaust hole 27a, and have flowed around and become extremely small.
以下第２図ａ，ｂによつて、本発明の外囲器を
使用した蛍光表示管と、第４図に示す従来の外囲
器を使用した蛍光表示管を同一条件で駆動した場
合の特性を比較を示す。 The characteristics of a fluorescent display tube using the envelope of the present invention and a fluorescent display tube using the conventional envelope shown in FIG. 4 under the same conditions are shown below in FIGS. 2a and b. Show the comparison.
第２図ａは、パルスエミツシヨン（電子放出能
力）の時系列変化の比較を示したもので、本発明
の外囲器を用いた蛍光表示管は、従来例に比較し
て、初期特性は約９％程度、1000時間経過後の特
性は約25％程度優れている。また、本発明の外囲
器を用いた蛍光表示管は、1000時間経過後のパル
スエミツシヨンが初期に対し約64％までしか低下
していないのに対し、従来のものではパルスエミ
ツシヨンは初期に対して約58％まで低下してお
り、パルスエミツシヨンの低下率でも優れてい
る。 Figure 2a shows a comparison of time-series changes in pulse emission (electron emission ability), and shows that the fluorescent display tube using the envelope of the present invention has lower initial characteristics than the conventional example. The properties are about 9% better, and the characteristics after 1000 hours are about 25% better. In addition, in the fluorescent display tube using the envelope of the present invention, the pulse emission after 1000 hours has decreased to only about 64% of the initial value, whereas in the conventional type, the pulse emission decreased in the initial stage. The reduction rate is approximately 58% compared to that of the previous model, which is also excellent in terms of pulse emission reduction rate.
また、第２図ｂは、発光輝度の時系列変化の比
較を示したもので、本発明の外囲器を用いた蛍光
表示管は、従来の外囲器を使用した蛍光表示管と
比較して、初期輝度では約５％、1000時間経過後
の輝度は８％程度優れている。そして、本発明の
外囲器を用いた蛍光表示管は、1000時間経過後の
輝度が初期輝度に対して約77％の低下にとどまつ
ているのに対し、従来のものでは約74％まで低下
している。 Furthermore, Fig. 2b shows a comparison of the time-series changes in luminance, showing that the fluorescent display tube using the envelope of the present invention is compared with the fluorescent display tube using the conventional envelope. The initial brightness is about 5% better, and the brightness after 1000 hours is about 8% better. In addition, in the fluorescent display tube using the envelope of the present invention, the brightness after 1000 hours has decreased by only about 77% of the initial brightness, whereas in the conventional type, the brightness has decreased to about 74%. are doing.
以上のことから、本発明の外囲器を使用した蛍
光表示管において、封着時に封着材２９から発生
する蒸発物質や分解ガスの大部分は、蓋部材３０
の内面や排気孔２７ａの壁面に付着して、外囲器
内部にはわずかしか流入せず、第４図に示す従来
例のように、排気孔７ａ内まで封着材９が侵入し
ている場合と比較して、蒸発物質や分解ガスが、
フイラメント状陰極２５や蛍光体２４等におよぼ
す悪影響がはるかに少ないことが解る。 From the above, in the fluorescent display tube using the envelope of the present invention, most of the evaporated substances and decomposed gas generated from the sealing material 29 during sealing are absorbed by the lid member 30.
The sealing material 9 adheres to the inner surface of the exhaust hole 27a and the wall surface of the exhaust hole 27a, and only a small amount flows into the envelope, and as in the conventional example shown in FIG. 4, the sealing material 9 penetrates into the exhaust hole 7a. Compared to the case, evaporated substances and decomposed gases
It can be seen that the negative effect on the filament cathode 25, the phosphor 24, etc. is much less.
しかして本発明の外囲器は、蓋部材の封着材を
封着時に外囲器の排気孔の端部から所定距離離間
して被着配設し、外囲器内部から封着材が直接見
ることができない構成としたので、封着時に封着
材から発生する蒸発物質や分解ガスが、外囲器内
部に流入するのを極力防止でき、蒸発物質や分解
ガスが、外囲器内部の各種部材に付着して、表示
管の特性を低下させるといつた悪影響をおよぼす
ことのない表示管の外囲器を得ることができる。
Therefore, in the envelope of the present invention, the sealing material of the lid member is placed at a predetermined distance from the end of the exhaust hole of the envelope during sealing, and the sealing material is removed from the inside of the envelope. Since it is configured so that it cannot be seen directly, it is possible to prevent evaporated substances and decomposed gas generated from the sealing material during sealing from flowing into the inside of the envelope as much as possible. It is possible to obtain an envelope for a display tube that does not cause adverse effects such as deterioration of the characteristics of the display tube by adhering to various members of the display tube.
また、チツプ管のない構成であるので、前述の
いわゆるチツプレス表示管としての効果も十分に
得ることができる。 Further, since the structure does not include a chip tube, it is possible to sufficiently obtain the effect as the so-called chipless display tube described above.
第１図は、本発明の表示管の外囲器の一実施例
を示した断面図、第２図ａ，ｂは、本発明の表示
管の外囲器と、従来の表示管の外囲器とを表示管
に実装した場合の特性の比較した図、第３図及び
第４図は、従来の表示管の外囲器の一例を示した
図。
２１……基板、２７……上面板、２７ａ……排
気孔、２８……側面板、２９，３１……封着剤、
３０……蓋部材。
FIG. 1 is a cross-sectional view showing an embodiment of the display tube envelope of the present invention, and FIGS. 2a and 2b show the display tube envelope of the present invention and the conventional display tube envelope. FIGS. 3 and 4 are diagrams illustrating an example of the envelope of a conventional display tube. FIGS. 21...Substrate, 27...Top plate, 27a...Exhaust hole, 28...Side plate, 29, 31...Sealing agent,
30...Lid member.
Claims (1)
た排気孔を、封着材を介して平板状蓋部材で封止
し、内部に特定の雰囲気が形成された表示管の外
囲器において、 封着時における封着材の厚みｈと、この封着材
の前記排気孔端部からの配設位置ｌと、前記排気
孔の直径ｄおよび前記外囲器の厚みｔとの関係が
ｌ≧（ｄ／ｔ）ｈとなるように、封着材の配設位
置を排気孔の端部から一定距離以上離間したこと
を特徴とする表示管の外囲器。 ２ 前記封着材の厚みが20μｍ以上200μｍ以下で
あることを特徴とする特許請求の範囲第１項記載
の表示管の外囲器。[Claims] 1. In a specific atmosphere, an exhaust hole provided in a part of the envelope is sealed with a flat lid member via a sealing material, and a specific atmosphere is formed inside. In the display tube envelope, the thickness h of the sealing material at the time of sealing, the position l of this sealing material from the end of the exhaust hole, the diameter d of the exhaust hole, and the envelope An envelope for a display tube, characterized in that the position of the sealing material is spaced a certain distance or more from the end of the exhaust hole so that the relationship with the thickness t is l≧(d/t)h. . 2. The display tube envelope according to claim 1, wherein the sealing material has a thickness of 20 μm or more and 200 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27613585A JPS62136739A (en) | 1985-12-10 | 1985-12-10 | Envelope for display tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27613585A JPS62136739A (en) | 1985-12-10 | 1985-12-10 | Envelope for display tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62136739A JPS62136739A (en) | 1987-06-19 |
| JPH0442775B2 true JPH0442775B2 (en) | 1992-07-14 |
Family
ID=17565268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27613585A Granted JPS62136739A (en) | 1985-12-10 | 1985-12-10 | Envelope for display tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62136739A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100300333B1 (en) * | 1999-05-11 | 2001-09-26 | 김순택 | Production Method of Vacuum Fluorescent Display |
-
1985
- 1985-12-10 JP JP27613585A patent/JPS62136739A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62136739A (en) | 1987-06-19 |
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| Date | Code | Title | Description |
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| LAPS | Cancellation because of no payment of annual fees |