JPS62206746A - Indirectly-heated cathode for fluorescent character display tube - Google Patents
Indirectly-heated cathode for fluorescent character display tubeInfo
- Publication number
- JPS62206746A JPS62206746A JP4756886A JP4756886A JPS62206746A JP S62206746 A JPS62206746 A JP S62206746A JP 4756886 A JP4756886 A JP 4756886A JP 4756886 A JP4756886 A JP 4756886A JP S62206746 A JPS62206746 A JP S62206746A
- Authority
- JP
- Japan
- Prior art keywords
- wire
- heater
- cathode
- tungsten
- display 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.)
- Pending
Links
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 6
- 239000010937 tungsten Substances 0.000 claims abstract description 6
- 239000000126 substance Substances 0.000 claims abstract description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 5
- DECCZIUVGMLHKQ-UHFFFAOYSA-N rhenium tungsten Chemical compound [W].[Re] DECCZIUVGMLHKQ-UHFFFAOYSA-N 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 2
- 239000000292 calcium oxide Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 229910052749 magnesium Inorganic materials 0.000 claims description 2
- 239000011777 magnesium Substances 0.000 claims description 2
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical group O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims 2
- 238000002844 melting Methods 0.000 claims 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 claims 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000012212 insulator Substances 0.000 abstract 3
- 239000000758 substrate Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 5
- 238000004070 electrodeposition Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 235000014347 soups Nutrition 0.000 description 1
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は螢光表示管用傍熱型陰極に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an indirectly heated cathode for a fluorescent display tube.
螢光表示管に８いて、陰極が直熱型の場合、両端の桁で
輝度に差が生じる。これは、陰極の両端すなわち、表示
桁の両端では陰極と陽極間の電圧に陰極加熱電圧に等し
い電位差が生じるためである。この欠点を改善する方法
の一つとして傍熱型陰極を用いる方法がある。従来の傍
熱型陰極は第２図のような構造になっていた。丁なわち
、ニッケル細管より成る陰極基体１４にヒータ芯線１１
上にアルミナ絶縁層１２を形成したヒータ１３が通され
ている。ニッケル細管上には電子放射物質１５が塗布さ
れ陰極１６を形成している。ニッケル細管の片方の端部
はヒータ芯線にかしめられてＳｒ）電気的につながって
いる。このような構造の傍熱型陰極は、ヒータをニッケ
ル細管に通す必要があり製作が困難であった。このため
大量に安く作れないという欠点があった。If the fluorescent display tube has a directly heated cathode, there will be a difference in brightness between the digits at both ends. This is because a potential difference equal to the cathode heating voltage occurs between the cathode and the anode at both ends of the cathode, that is, at both ends of the display digit. One method to improve this drawback is to use an indirectly heated cathode. A conventional indirectly heated cathode had a structure as shown in Figure 2. In other words, the heater core wire 11 is attached to the cathode base 14 made of a nickel thin tube.
A heater 13 having an alumina insulating layer 12 formed thereon is passed through. An electron emitting material 15 is coated on the nickel tube to form a cathode 16. One end of the nickel thin tube is caulked to the heater core wire and electrically connected to it. An indirectly heated cathode with such a structure was difficult to manufacture because it required the heater to pass through a nickel capillary. For this reason, it had the disadvantage that it could not be produced in large quantities at low cost.
本発明は上記の欠点を除去し、容易に製作できる螢光表
示管用傍熱型陰極を提供するものである。The present invention eliminates the above-mentioned drawbacks and provides an indirectly heated cathode for a fluorescent display tube that can be easily manufactured.
本発明の螢光表示管用傍熱型陰極はヒータ芯線に絶縁層
が形成されたヒータと、それに密巻きされた金属細線と
、更にその上に塗布された電子放射物質とから構成され
ている。The indirectly heated cathode for a fluorescent display tube of the present invention is composed of a heater having an insulating layer formed on the heater core wire, a thin metal wire tightly wound around the heater core wire, and an electron emitting material coated on the heater core wire.
次に１本発明について図面を参照して説明する。 Next, one embodiment of the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例の断面図である。ヒータ３は
φ５０μｍのタングステンよりなると−タ芯線１と厚さ
約２０μｍのアルミナ絶縁層２から成りている。アルミ
ナ絶縁層は、アルミナ粉末な′１着法によりヒータ芯線
上に付着し、その後１６５０℃で焼結したものである。FIG. 1 is a sectional view of an embodiment of the present invention. The heater 3 consists of a tungsten core wire 1 with a diameter of 50 .mu.m and an alumina insulating layer 2 with a thickness of about 20 .mu.m. The alumina insulating layer was deposited on the heater core wire by a single deposition method using alumina powder, and then sintered at 1650°C.
ヒータにはφ１０μｍのタングステン線が密巻きされ陰
極基体４を形成している。密巻きされたタングステン線
は隣とうし接触しているため陰極基体の長さ方向の抵抗
は小さい。なお、タングステン線はヒータの一方の端部
でアルミナ絶縁層のない部分から密巻きさルてＳす、陰
極基体とヒータは電気的につながっている。陰極基体上
には電子放射物質５が約１５μの厚さで塗布されており
陰極基体ともに陰極６を形成している。A tungsten wire having a diameter of 10 μm is tightly wound around the heater to form a cathode base 4. Since the tightly wound tungsten wires are in contact with each other, the resistance in the length direction of the cathode substrate is small. Note that the tungsten wire is tightly wound from one end of the heater where there is no alumina insulating layer, so that the cathode substrate and the heater are electrically connected. An electron emitting material 5 is coated on the cathode substrate to a thickness of about 15 μm, and the cathode substrate and the cathode substrate together form a cathode 6.
ここに示した実施例では、陰極基体を形成する金属細線
としてタングステン線を用いたが、この他にモリブテン
線又はニッケル線を用いてもよい。In the embodiment shown here, a tungsten wire was used as the thin metal wire forming the cathode substrate, but a molybdenum wire or a nickel wire may also be used.
又、ヒータ芯線として上記実施例ではタングステン線を
用いたが、レニウム・タングステン線又はモリブテン線
を用いてもよい。また、金属細線としてはタングステン
線の他に、レニウム−タングステン線又はモリブテン線
又はニッケル線又はジルコニウム、シリコン！グネシウ
ム、タングステン、アルミニウムのうち１種以上が還元
剤として添加されたニッケル線を用いてもよい。更に、
絶縁層としてはアルミナ粉末の他に、酸化カルシウム、
酸化ケイ素、酸化イツトリウムのうち１種以上添加され
たアルミナ粉末を用いてもよい。Furthermore, although a tungsten wire was used as the heater core wire in the above embodiment, a rhenium-tungsten wire or a molybdenum wire may also be used. In addition to tungsten wire, fine metal wires include rhenium-tungsten wire, molybdenum wire, nickel wire, zirconium, silicon! A nickel wire to which one or more of magnesium, tungsten, and aluminum is added as a reducing agent may be used. Furthermore,
In addition to alumina powder, calcium oxide,
Alumina powder to which one or more of silicon oxide and yttrium oxide is added may also be used.
以上説明したように本発明による傍熱型陰極は。 As explained above, the indirectly heated cathode according to the present invention.
従来のような陰極基体としては管状のものを用いていな
い。このためヒータを細管内に通ずというような困難な
作業を行な５必要がない。従って製造コストも安くでき
る効果がある。例えば本発明の傍熱型陰極は次のような
簡単な方法により製作することができる。A tubular cathode substrate is not used as in the conventional case. Therefore, there is no need to perform difficult work such as passing the heater into the thin tube. Therefore, the manufacturing cost can be reduced. For example, the indirectly heated cathode of the present invention can be manufactured by the following simple method.
まず、ヒータ芯線にアルミナ絶縁層を′ｔＬ着及び焼成
により連続的に形成する。このときヒータ両端部のアル
ミナ絶縁層がない所に相当する部分は電着時印加′１圧
を切りアルミナが付着しないようにする。ヒータを製作
後このヒータを巻芯にして、タングステン線を密巻きに
し陰極基体な形成する。First, an alumina insulating layer is continuously formed on the heater core wire by 'tL deposition and firing. At this time, the voltage '1 applied during electrodeposition is turned off at both ends of the heater corresponding to the areas where there is no alumina insulating layer to prevent alumina from adhering. After manufacturing the heater, the heater is used as a winding core, and a tungsten wire is tightly wound to form a cathode substrate.
次に電子放射物質を電着法により陰極基体上に付着させ
ていぐ。電着後所定の寸法に細切９し、ヒータ両端部に
巻かｎているタングステン線を巻きもどして除去する。Next, an electron-emitting substance is deposited on the cathode substrate by electrodeposition. After electrodeposition, it is cut into pieces 9 of a predetermined size, and the tungsten wire wound around both ends of the heater is unwound and removed.
但し、一方の端部ではヒータと陰極基体が電気的につな
がるように、ヒータ芯線に巻かれたタングステン臓を若
干式して８く。However, at one end, a tungsten core wound around the heater core wire is slightly inserted so that the heater and the cathode base are electrically connected.
上記に示した方法のように１本発明の傍熱型陰極は連続
的に製作することができるため、大量にしかも安く作る
ことができないとい５利点を有する。As with the above-described method, the indirectly heated cathode of the present invention can be manufactured continuously, so it has five advantages in that it cannot be manufactured in large quantities and at low cost.
なｇ１本発明の傍熱型陰極を用いた螢光表示管は１両端
の桁で輝度の差が生じるようなことはなく、良好な表示
が得られたことは言うまでもない。It goes without saying that in the fluorescent display tube using the indirectly heated cathode of the present invention, there was no difference in brightness between the digits at both ends, and a good display was obtained.
第４図は本発明の実施例の断面図、第２図は従来の傍熱
ａｔｓ＋ｔｔ極断面図である。
１・−・・・・ヒータ芯線、２・・・・・・アルミナ絶
縁層％３・・・・・・ヒータ、４・・・・・・金属細線
よりなる陰極基体、５・・・・・・電子放射物質、６・
・・・・・陰極、１１・・・・・・ヒータ芯線、１２・
・・・・・アルミナ絶縁層、１３・・・・−・ヒータ、
１４・・・・−・ニッケル細管よりなる陰極基体。
１５・・・・・・電子放射物質、１６・・・・・・陰極
。
代理人 弁理士 内 原 晋 ＋−，、′、、。
！＝・−ヒーダλジ線 ２−・−アンレミ゛ツーを
糸＆４ケ ３−一−ヒーダ４−、ｉ、Ｍｌ：ａＬｈ
＋１＊＋＃Ｊ＊Ｊｊ右ト ｓ−４，１＊ｆＲｎ
’ｆ１６−−−后Ｔオ小 １１−−−ヒーグ心
緯 ／２−・−Ｙルミ５ｒ剰ジ簡−汁１３−・
−ヒータ ／４−−−：；ヅ１ル赤コ（ｙ・）０
賃【十七爆ｆ卜ぶ一帽倣射物質 ／乙−隙枯
矛 ｌｒｆ！Ｊ
茅 ２ 図FIG. 4 is a sectional view of an embodiment of the present invention, and FIG. 2 is a conventional indirectly heated ats+tt polar sectional view. 1...Heater core wire, 2...Alumina insulating layer %3...Heater, 4...Cathode base made of thin metal wire, 5...・Electron emitting material, 6・
... Cathode, 11 ... Heater core wire, 12.
...Alumina insulating layer, 13 ...--Heater,
14... Cathode base made of nickel capillary. 15... Electron emitting material, 16... Cathode. Agent Patent Attorney Susumu Uchihara +-,,′,,. ! =・-Header λ line 2-・-Unremi 2 thread & 4 pieces 3-1-Header 4-, i, Ml:aLh
+1*+#J*Jj right s-4, 1*fRn
'f16---Later T O small 11---Heag heart latitude /2-・-Y Lumi 5r remainder simple soup 13-・
-Heater /4---:;Zu1ru Akako (y・)0
Rent [17 bombs f 1 hat imitation projectile material / Otsu-gap dry spear lrf! J Kaya 2 figure
Claims (4)
れて成るヒータに金属細線を密巻きすることにより陰極
基体を形成し、 前記陰極基体上に電子放射物質を付着したことを特徴と
する螢光表示管用傍熱型陰極。(1) A cathode base is formed by tightly winding a thin metal wire around a heater in which a heater core wire made of a high-melting point metal is covered with an insulating layer, and an electron emitting substance is attached onto the cathode base. Indirectly heated cathode for fluorescent display tubes.
タングステン線又はモリブテン線であることを特徴とす
る特許請求範囲第１項記載の螢光表示管用傍熱型陰極。(2) The heater core wire is tungsten wire or rhenium wire.
An indirectly heated cathode for a fluorescent display tube according to claim 1, characterized in that it is a tungsten wire or a molybdenum wire.
ングステン線又はモリブテン線又はニッケル線又はジル
コニウム、シリコン、マグネシウム、タングステン、ア
ルミニウムのうち１種以上添加されたニッケル線である
ことを特徴とする特許請求範囲第１項記載の螢光表示管
用傍熱型陰極。(3) Claims characterized in that the metal thin wire is a tungsten wire, a rhenium-tungsten wire, a molybdenum wire, a nickel wire, or a nickel wire doped with one or more of zirconium, silicon, magnesium, tungsten, and aluminum. 2. The indirectly heated cathode for a fluorescent display tube according to item 1.
ウム、酸化ケイ素、酸化イットリウムのうち１種以上添
加された酸化アルミニウムであることを特徴とする特許
請求範囲第１項記載の螢光表示管用傍熱型陰極。(4) Indirect heating for a fluorescent display tube according to claim 1, wherein the insulating layer is aluminum oxide or aluminum oxide to which one or more of calcium oxide, silicon oxide, and yttrium oxide is added. type cathode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4756886A JPS62206746A (en) | 1986-03-04 | 1986-03-04 | Indirectly-heated cathode for fluorescent character display tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4756886A JPS62206746A (en) | 1986-03-04 | 1986-03-04 | Indirectly-heated cathode for fluorescent character display tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62206746A true JPS62206746A (en) | 1987-09-11 |
Family
ID=12778831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4756886A Pending JPS62206746A (en) | 1986-03-04 | 1986-03-04 | Indirectly-heated cathode for fluorescent character display tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62206746A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62206737A (en) * | 1986-03-07 | 1987-09-11 | Futaba Corp | Indirectly-heated cathode |
-
1986
- 1986-03-04 JP JP4756886A patent/JPS62206746A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62206737A (en) * | 1986-03-07 | 1987-09-11 | Futaba Corp | Indirectly-heated cathode |
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