JPS63285837A - Linear hot cathode - Google Patents
Linear hot cathodeInfo
- Publication number
- JPS63285837A JPS63285837A JP62122053A JP12205387A JPS63285837A JP S63285837 A JPS63285837 A JP S63285837A JP 62122053 A JP62122053 A JP 62122053A JP 12205387 A JP12205387 A JP 12205387A JP S63285837 A JPS63285837 A JP S63285837A
- Authority
- JP
- Japan
- Prior art keywords
- cathode
- earth metal
- metal oxide
- rare earth
- emission current
- 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.)
- Granted
Links
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 8
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052721 tungsten Inorganic materials 0.000 abstract description 5
- 239000010937 tungsten Substances 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 4
- RUDFQVOCFDJEEF-UHFFFAOYSA-N yttrium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Y+3].[Y+3] RUDFQVOCFDJEEF-UHFFFAOYSA-N 0.000 abstract description 4
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(III) oxide Inorganic materials [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 abstract description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 229910052750 molybdenum Inorganic materials 0.000 abstract 1
- 239000011733 molybdenum Substances 0.000 abstract 1
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium(III) oxide Inorganic materials O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 239000011575 calcium Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 229910052791 calcium Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004070 electrodeposition Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052712 strontium Inorganic materials 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 238000009125 cardiac resynchronization therapy Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Electrodes For Cathode-Ray Tubes (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、真空管、ＣＲＴ 、蛍光表示管等に使用す
る線状熱陰極に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a linear hot cathode used in vacuum tubes, CRTs, fluorescent display tubes, and the like.
線状熱陰極を利用する機器は従来種々提案されており、
例えば平板型表示装置としては第４図に示す如きものが
ある（特開昭６０−８４７４４号）。Various devices using linear hot cathodes have been proposed in the past.
For example, there is a flat panel display device as shown in FIG. 4 (Japanese Patent Application Laid-open No. 84744/1983).
第４図は従来の平板型表示装置を示す梗式的断面図であ
り、この表示装置は絶縁性基板１上に一定の間隔で設け
た複数の金属製係市部２に渡して、所定の間隔で電子放
射物質を保持させて陰極４ｈを形成した陰極ワイヤー３
を張架し、各陰極４ｂと対応させて絶縁性基板１上に制
御電極５を配設すると共に、陰極ワイヤー３の上方には
各陰極４ｂと対応した位置に貫通孔６ａを備えたグリッ
ド電極６を、更にこのグリッド電極６の上方には上記各
陰極４ｂに対応した位置に蛍光体７を塗布したアノード
８を夫々上１、下方向に所要の間隔を隔てて配設して構
成しである。FIG. 4 is a schematic cross-sectional view showing a conventional flat panel display device. Cathode wire 3 holding electron emitting material at intervals to form a cathode 4h
A control electrode 5 is arranged on the insulating substrate 1 in correspondence with each cathode 4b, and a grid electrode is provided above the cathode wire 3 with a through hole 6a at a position corresponding to each cathode 4b. 6, and above the grid electrode 6, anodes 8 coated with phosphor 7 are arranged at positions corresponding to the respective cathodes 4b at required intervals in the upper and lower directions, respectively. be.
前記陰極ワイヤー３はタングステン製であり、また陰極
４ｂは陰極ワイヤー３の表面に電着法、或いは塗布法な
どによりバリウム、ス１−ロンチウム、カルシウムの三
元炭酸塩（（Ｈａ、 Ｓｒ、 Ｃａ）ＣＯ３）を付着さ
せ、表示装置容器内を真空に排気する過程でこれを加熱
分解し、上記炭酸塩を酸化物（（Ｂａ。The cathode wire 3 is made of tungsten, and the cathode 4b is made of ternary carbonate ((Ha, Sr, Ca) of barium, strontium, and calcium by electrodeposition or coating on the surface of the cathode wire 3. During the process of evacuating the inside of the display device container, this is thermally decomposed, and the carbonate is converted into an oxide ((Ba.
Ｓｒ、 Ｃａ） Ｏ）に変換して形成しである。なお、
この際に陰極ワイヤー３のタングステンとの反応で電子
放射物質中のＲａＯが還元されて金属Ｂａを生成するが
、このＢａは拡散等によって陰極表面へ移動し、Ｂａｄ
、 ＳｒＯ，ＣａＯの表面に吸着して、所謂ｎ型半導体
構造を構成し、陰極４５表面の仕事関数を低下させ、エ
ミッションに寄与することとなる。なおｎａがＣａＯ上
に吸着した場合においてエミッションに対する寄与が最
も大きく表れる。It is formed by converting it into Sr, Ca) O). In addition,
At this time, RaO in the electron emitting material is reduced by the reaction with tungsten of the cathode wire 3 to generate metal Ba, but this Ba moves to the cathode surface by diffusion etc.
, SrO, and CaO, and form a so-called n-type semiconductor structure, lowering the work function of the surface of the cathode 45 and contributing to emissions. Note that when na is adsorbed on CaO, its contribution to emissions is greatest.
次に動作について説明する。陰極ワイヤー３をその両端
に給電して約７００℃に加熱すると陰極４ｂ表面から電
子が放射される。このときグリッド電極６及びアノード
８に正の電極を印加すれば電子ビームは貫通孔６ａを通
して蛍光体７に導かれ、蛍光体７を励起せしめる。一方
制御電極５に負の電圧を印加すると陰極４ｂ周辺の電界
が陰極４１）に対して負となり、陰極４ｈからの電子放
射を停止せしめ得るから、例えば制御電極５に正のパル
ス電圧を印加することにより電子ビームの放射を制御で
きることとなる。Next, the operation will be explained. When the cathode wire 3 is heated to about 700° C. by supplying power to both ends thereof, electrons are emitted from the surface of the cathode 4b. At this time, if a positive electrode is applied to the grid electrode 6 and the anode 8, the electron beam is guided to the phosphor 7 through the through hole 6a and excites the phosphor 7. On the other hand, if a negative voltage is applied to the control electrode 5, the electric field around the cathode 4b becomes negative with respect to the cathode 41), and electron emission from the cathode 4h can be stopped. Therefore, for example, a positive pulse voltage is applied to the control electrode 5. This makes it possible to control the emission of the electron beam.
ところで従来の線状熱陰極は前述し７た如く炭酸塩を酸
化物に替える過程、或いは表示装置の初期動作時に蛍光
体７．係止部２等から放出される不純ガスの影響により
、初期エミッション電流が低くなり、また長時間動作さ
せると、８ａの消耗が大きいためにエミッション電流が
低下し、輝度の低下が著しいなどの問題点があった。By the way, in the conventional linear hot cathode, the phosphor 7. Due to the influence of impure gas emitted from the locking part 2, etc., the initial emission current becomes low, and when operated for a long time, the emission current decreases due to large consumption of 8a, causing problems such as a significant decrease in brightness. There was a point.
この発明は上記のような問題点を解消するためになされ
たもので、初期エミッション電流が高く、しかも長時間
動作後もエミッション電流の低下が少なく長期にわたり
高い輝度を維持し１９る線状熱陰極を櫂供することを目
的とする。This invention was made in order to solve the above-mentioned problems, and it provides a linear hot cathode that has a high initial emission current, has a small drop in emission current even after long-term operation, and maintains high brightness over a long period of time. The purpose is to provide a paddle.
この発明に係る線状熱陰極は０．２〜２０重量％の希土
類金属酸化物と、酸化バリウムを含んだアルカリ土類金
属酸化物とを含む混合物であって、希土類金属酸化物に
対する酸化バリウムの重量比を０．４〜６０とした電子
放射物質を線状の耐熱性金属表面に保持したものである
。The linear hot cathode according to the present invention is a mixture containing 0.2 to 20% by weight of a rare earth metal oxide and an alkaline earth metal oxide containing barium oxide. An electron-emitting material having a weight ratio of 0.4 to 60 is held on a linear heat-resistant metal surface.
この発明における線状熱陰極は電子放射物質中の希土類
金属酸化物により電子放射物質が活性化され、且つ陰極
表面での不純物の作用を抑制し、初期エミッション電流
が高く、しかも長時間動作後におけるエミッション電流
の低下も少ない。In the linear hot cathode of this invention, the electron emitting material is activated by the rare earth metal oxide in the electron emitting material, and the action of impurities on the cathode surface is suppressed, so that the initial emission current is high, and moreover, after long-term operation, The drop in emission current is also small.
第１図はこの発明の一実施例による線状熱陰極を用いた
表示装置の要部を示す模式的断面図であり、図中１はガ
ラス板、セラミック板等で構成した絶縁性基板、２は主
として金属製の突起又はリブ等として形成される係止部
、３はタングステン等の耐熱性金属製の陰極ワイヤー、
４ａは陰極ワイヤー３にその長手方向に所要の間隔で形
成された陰極、５は制御電極、６はグリッド電極、８は
アノードを夫々示している。FIG. 1 is a schematic sectional view showing the main parts of a display device using a linear hot cathode according to an embodiment of the present invention, in which 1 is an insulating substrate made of a glass plate, a ceramic plate, etc.; 3 is a locking portion mainly formed as a metal protrusion or rib, 3 is a cathode wire made of a heat-resistant metal such as tungsten,
Reference numeral 4a designates cathodes formed at required intervals in the longitudinal direction of the cathode wire 3, 5 a control electrode, 6 a grid electrode, and 8 an anode.
絶縁性基板１上に一定間隔で複数の係止部２を設け、こ
の各係止部２に渡す態様で陰極ワイヤー３を、これに形
成した陰極４ａが相隣する係止部２゜２間に位置するよ
う張架し、絶縁性基板ｌ上には前記各陰極４ａと対向す
る位置に制御型ＶＦＡ５を配設し、また、陰極ワイヤー
３の上方には前記陰極４ａと対向する位置に貫通孔６ａ
を開口したグリッド電極６を、更にその上には前記陰極
４ａと対向する位置に蛍光体７を付したアノード８を夫
々Ｌ下方向に所要の間隔を隔てて配設しである。A plurality of locking portions 2 are provided at regular intervals on an insulating substrate 1, and a cathode wire 3 is passed between each of the locking portions 2, and cathodes 4a formed thereon are placed between adjacent locking portions 2°2. A controlled VFA 5 is disposed on the insulating substrate l at a position facing each of the cathodes 4a, and a penetrating VFA 5 is provided above the cathode wire 3 at a position facing the cathode 4a. Hole 6a
A grid electrode 6 with an opening is disposed thereon, and an anode 8 having a phosphor 7 attached thereto at a position facing the cathode 4a is disposed at a predetermined distance from each other in the downward direction L.
このような構成は陰極４ａを除き前記第２図に示した従
来品と実質的に同じである。This structure is substantially the same as the conventional product shown in FIG. 2, except for the cathode 4a.
そして本発明に係る実施例の陰極４ａには０，２〜２０
重量％の希土類金属酸化物と、残部が少なくとも酸化バ
リウムを含むアルカリ土類金属酸化物との混合物とから
なり、希土類金属酸化物に対する酸化バリウムの重量比
を０．４〜６０、望ましくは０．７〜３０とした電子放
射物質を用いる。In the cathode 4a of the embodiment according to the present invention, 0.2 to 20
% by weight of a rare earth metal oxide and an alkaline earth metal oxide with the balance at least containing barium oxide, the weight ratio of barium oxide to rare earth metal oxide being 0.4 to 60, preferably 0. An electron emitting material having a rating of 7 to 30 is used.
なお前記希土類金属酸化物としてはＳｃ ２ｏ ３＋
Ｙ２０３ 。Note that the rare earth metal oxide is Sc 2o 3+
Y203.
Ｇｄ ２０３等が用いられ、例えばＹ２Ｏ３にあっては
重量比ＢａＯ／Ｙ２Ｏ３を０．９〜３３に、またＧｄ２
Ｏ３にあっては重量比ＢａＯ／Ｇｄ２Ｏ３を１．２〜３
５に設定するのが望ましい。For example, for Y2O3, the weight ratio BaO/Y2O3 is set to 0.9 to 33, and Gd2
For O3, the weight ratio BaO/Gd2O3 is 1.2 to 3.
It is desirable to set it to 5.
希土類金属酸化物に対する酸化バリウムの重量比を０．
４〜６０とするのは次の理由による。The weight ratio of barium oxide to rare earth metal oxide is 0.
The reason why it is set to 4 to 60 is as follows.
即ち、ＣａＯとＳｒＯとの和が３６重量％、またＢａＯ
と５ｃ２０３との和が６４重量％（Ｓｃ２０３に対する
ＢａＯの重量比は１０とした）になるよう重量比を変化
させて、Ｓｃ ２ （ＣＯ３） ３の含有率を異にする
複数の電着液を作成し、従来と同様の電着法に基づき、
従来とほぼ同一の膜厚（８μｍ）で電子放射物質を陰極
ワイヤー３に保持せしめて各陰極を作成した。That is, the sum of CaO and SrO is 36% by weight, and BaO
A plurality of electrodeposition solutions with different contents of Sc 2 (CO 3 ) 3 were prepared by changing the weight ratio so that the sum of Created using the same electrodeposition method as before,
Each cathode was made by holding an electron-emitting substance on the cathode wire 3 with almost the same film thickness (8 μm) as in the conventional case.
これを表示装置の排気過程において加熱し、（Ｂａ ＋
Ｓ ｒ ＋ Ｃａ ） Ｃｏ ３ Ｓｃ ２ （Ｃ
Ｏ３） ３を（！ｌａ、Ｓｒ、 Ｃａ）０−５ｃ２０３
に変えて夫々組成化の異なる陰極を有する表示装置を作
成した。This is heated during the exhaust process of the display device, and (Ba +
S r + Ca ) Co 3 Sc 2 (C
O3) 3(!la, Sr, Ca)0-5c203
Instead, display devices having cathodes with different compositions were created.
この各表示装置について２時間動作後、フィラメント電
流を一定にした時のパルスエミッション電流値を測定し
た。なお従来品にあってはＢａｄ：６４重９％、ＳｒＯ
：３２重量％、Ｃａｂ： ４ 重量％とじた電子放射物
質を用いて陰極を形成した。その結果を第３図に示す。After each display device had been operated for 2 hours, the pulse emission current value was measured when the filament current was kept constant. In addition, for conventional products, Bad: 64 weight 9%, SrO
A cathode was formed using an electron emitting material containing: 32% by weight and 4% by weight. The results are shown in FIG.
第３図に示すグラフは横軸に８ａＯ，ＳｒＯ。The graph shown in FIG. 3 has 8aO and SrO on the horizontal axis.
ＣａＯ，ＳＣ；！０３を含む混合物中の５ｃ２０３に対
するＢａＯの重量比をとり、また縦軸には従来品のパル
スエミッション電流値を１００とした時の相対電流値を
とって示しである。このグラフから明らかなように、５
ｃ２０３に対するＲａＯの重量比が０．４〜６０の範囲
内ではパルスエミッション電流の増加傾向が顕著であり
、特に重９比が０．７〜３０の範囲で高いパルスエミッ
ション電流が得られることが解る。CaO,SC;! The weight ratio of BaO to 5c203 in the mixture containing 03 is taken, and the vertical axis is the relative current value when the pulse emission current value of the conventional product is taken as 100. As is clear from this graph, 5
It can be seen that when the weight ratio of RaO to c203 is in the range of 0.4 to 60, the pulse emission current tends to increase significantly, and especially when the weight ratio of RaO to c203 is in the range of 0.7 to 30, a high pulse emission current can be obtained. .
次に上述の如くして得た本発明の実施例である陰極及び
従来品を超高真空装置内に配置し、０２ガスを導入して
１．０＝Ｔｏｒｒに設定し、酸素導入前、及び酸素導入
５分後におけるパルスエミッション電流を検出した。Next, the cathode according to the embodiment of the present invention and the conventional product obtained as described above were placed in an ultra-high vacuum apparatus, and 02 gas was introduced to set the pressure to 1.0 Torr. Pulse emission current was detected 5 minutes after oxygen introduction.
結果は第４図に示すとおりである。第４図に示すグラフ
は横軸にＢａＯ＋５ｅ２０３の重量％を、また縦軸にパ
ルスエミッション電流値（０２導入前の電流値を１００
としたときの０２導入５分後の電流値の相対値）をとっ
て示しである。このグラフから明らかなように従来品で
はパルスエミッション電流値が４５であるのに対し、本
発明の実施例ではｎａ。The results are shown in Figure 4. In the graph shown in Figure 4, the horizontal axis shows the weight percent of BaO+5e203, and the vertical axis shows the pulse emission current value (the current value before introducing 02 is 100%).
The relative value of the current value 5 minutes after the introduction of 02) is shown. As is clear from this graph, the pulse emission current value is 45 in the conventional product, whereas it is na in the embodiment of the present invention.
＋５ｃ２０３の和が６０重量％のときのパルスエミッシ
ョン電流値は５５、また和が７５重量％以上ではパルス
エミッション電流値は７０が得られており、輝度の低下
が著しく低減されていることが解る。When the sum of +5c203 is 60% by weight, the pulse emission current value is 55, and when the sum is 75% by weight or more, the pulse emission current value is 70, which shows that the reduction in brightness is significantly reduced.
これは陰極ワイヤー３のタングステンとの反応で還元さ
れたＢａが５ｃＪＩ上に吸着してエミッションに寄与す
ることとなるが、５ｃ２０３は耐熱性、耐電子衝撃性に
優れているのでエミッションを増加させると同時に、動
作中のＢａの消耗を抑１１ＪＪすることによると考えら
れる。This is because Ba reduced by the reaction with tungsten in the cathode wire 3 is adsorbed on 5cJI and contributes to emissions, but since 5c203 has excellent heat resistance and electron impact resistance, it does not increase emissions. At the same time, this is thought to be due to suppressing the consumption of Ba during operation.
この結果、実施例では初期輝度が高いことは勿論、長時
間動作後の残存輝度も高いので表示装置が明るい場所で
も使用可能になる。As a result, in the embodiment, not only the initial brightness is high, but also the residual brightness after long-time operation is high, so that the display device can be used even in bright places.
また陰極ワイヤー３に流れる電流値を増加させて高輝度
化を実現する場合には、特に寿命特性の向−ヒに顕著な
効果を有する。Further, when increasing the current value flowing through the cathode wire 3 to achieve high brightness, it has a particularly remarkable effect on improving the life characteristics.
なお」−述した実施例では線状耐熱性金属としてタング
ステン線を用いた場合につき説明したが何等これに限定
されるものではなく、主成分力（Ｍｏ。In addition, in the above-mentioned embodiment, the case where a tungsten wire was used as the linear heat-resistant metal was explained, but the present invention is not limited to this in any way, and the main component force (Mo) is used.
Ｔａ、ＰＬなどの場合も同様の効果が得られる。また陰
極の形状は実施例では直線状とした場合を示したが何ら
これに限るものではなく、板状、コイル状、スパイラル
状など任意の線状陰極形状でも上記した効果はえられる
。更に実施例は平板型表示装置に適用した場合につき説
明したが、蛍光表示管、線状熱陰極を用いたＣＲＴ 、
電子顕微鏡、蛍光ランプにも適用し得ることは勿論であ
る。Similar effects can be obtained in the case of Ta, PL, etc. Further, although the cathode shape is shown as being linear in the embodiment, it is not limited to this in any way, and the above-mentioned effects can be obtained with any linear cathode shape such as a plate shape, a coil shape, or a spiral shape. Furthermore, although the embodiments have been described with reference to the case where they are applied to a flat panel display device, they may also be applied to a fluorescent display tube, a CRT using a linear hot cathode,
Of course, it can also be applied to electron microscopes and fluorescent lamps.
以上説明したようにこの発明の陰極は初期エミッション
電流が大きく、また動作中におけるエミッション電流の
維持機能にも優れているので表示装置の高輝度化、電子
管装置などの高性能化に優れた効果を奏するものである
。As explained above, the cathode of the present invention has a large initial emission current and is also excellent in maintaining the emission current during operation, so it has excellent effects on increasing the brightness of display devices and improving the performance of electron tube devices. It is something to play.
第１図は本発明品を用いた表示装置の模式的断面図、第
２図は５ｃ２０３に対するＢａＯの重量比とパルスエミ
ッション電流値との関係を示す特性図、第３図はＢａＯ
と５ｃ２０３との和の重量％と酸素ガス導入５分後のパ
ルスエミッション電流値との関係を示す特性図、第４図
は従来の表示装置を示す模式的断面図である。
１・・・絶縁性基板 ２・・・係止部
３・・・陰極ワイヤー ４ａ・・・陰極 ５・・・制御
電極６・・・グリッド電極 ７・・・蛍光体 ８・・・
アノードなお、図中、同一符号は同一、又は相当部分を
示す。Figure 1 is a schematic cross-sectional view of a display device using the product of the present invention, Figure 2 is a characteristic diagram showing the relationship between the weight ratio of BaO to 5c203 and the pulse emission current value, and Figure 3 is a diagram showing the relationship between the weight ratio of BaO to 5c203 and the pulse emission current value.
FIG. 4 is a characteristic diagram showing the relationship between the weight percent of the sum of 5c203 and 5c203 and the pulse emission current value 5 minutes after the introduction of oxygen gas. FIG. 4 is a schematic cross-sectional view showing a conventional display device. 1... Insulating substrate 2... Locking part 3... Cathode wire 4a... Cathode 5... Control electrode 6... Grid electrode 7... Fluorescent substance 8...
Anode In the drawings, the same reference numerals indicate the same or corresponding parts.
Claims (1)
リウムを含んだアルカリ土類金属酸化物とを含む混合物
であって、希土類金属酸化物に対する酸化バリウムの重
量比を０．４〜６０とした電子放射物質を線状の耐熱性
金属表面に保持してあることを特徴とする線状熱陰極。1. A mixture containing 0.2 to 20% by weight of a rare earth metal oxide and an alkaline earth metal oxide containing barium oxide, the weight ratio of barium oxide to the rare earth metal oxide being 0.4 to 20% by weight. A linear hot cathode characterized in that an electron-emitting material having a molecular weight of 60% is held on the surface of a linear heat-resistant metal.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12205387A JPH0787068B2 (en) | 1987-05-18 | 1987-05-18 | Linear hot cathode |
| US07/105,668 US4897574A (en) | 1986-10-07 | 1987-10-05 | Hot cathode in wire form |
| DE3780246T DE3780246T3 (en) | 1986-10-07 | 1987-10-06 | Wire-shaped hot cathode. |
| EP87114566A EP0263483B2 (en) | 1986-10-07 | 1987-10-06 | Hot cathode in wire form |
| CA000548815A CA1276965C (en) | 1986-10-07 | 1987-10-07 | Hot cathode in wire form coated with rare and alkaline earth metal oxides containing barium oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12205387A JPH0787068B2 (en) | 1987-05-18 | 1987-05-18 | Linear hot cathode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63285837A true JPS63285837A (en) | 1988-11-22 |
| JPH0787068B2 JPH0787068B2 (en) | 1995-09-20 |
Family
ID=14826447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12205387A Expired - Fee Related JPH0787068B2 (en) | 1986-10-07 | 1987-05-18 | Linear hot cathode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0787068B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4833677A (en) * | 1971-09-03 | 1973-05-11 | ||
| JPS4912758A (en) * | 1972-05-12 | 1974-02-04 | ||
| JPS6084744A (en) * | 1983-10-15 | 1985-05-14 | Matsushita Electric Ind Co Ltd | Hot cathode |
-
1987
- 1987-05-18 JP JP12205387A patent/JPH0787068B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4833677A (en) * | 1971-09-03 | 1973-05-11 | ||
| JPS4912758A (en) * | 1972-05-12 | 1974-02-04 | ||
| JPS6084744A (en) * | 1983-10-15 | 1985-05-14 | Matsushita Electric Ind Co Ltd | Hot cathode |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0787068B2 (en) | 1995-09-20 |
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