JPH0355734A - Linear hot cathode - Google Patents
Linear hot cathodeInfo
- Publication number
- JPH0355734A JPH0355734A JP1191971A JP19197189A JPH0355734A JP H0355734 A JPH0355734 A JP H0355734A JP 1191971 A JP1191971 A JP 1191971A JP 19197189 A JP19197189 A JP 19197189A JP H0355734 A JPH0355734 A JP H0355734A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- oxide
- cathode
- barium
- earth metal
- 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
- 229910052788 barium Inorganic materials 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 8
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910001928 zirconium oxide Inorganic materials 0.000 claims abstract description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910000449 hafnium oxide Inorganic materials 0.000 claims abstract description 4
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 claims abstract description 4
- HYXGAEYDKFCVMU-UHFFFAOYSA-N scandium oxide Chemical compound O=[Sc]O[Sc]=O HYXGAEYDKFCVMU-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910000484 niobium oxide Inorganic materials 0.000 claims abstract description 3
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 claims abstract description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229910000287 alkaline earth metal oxide Inorganic materials 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 2
- 239000011575 calcium Substances 0.000 abstract description 6
- 238000004070 electrodeposition Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 229910052791 calcium Inorganic materials 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 229910052712 strontium Inorganic materials 0.000 abstract description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 3
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 abstract 2
- 150000002736 metal compounds Chemical class 0.000 abstract 2
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Inorganic materials [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 8
- 239000000758 substrate Substances 0.000 description 6
- 229910052721 tungsten Inorganic materials 0.000 description 6
- 239000010937 tungsten Substances 0.000 description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 2
- 150000001341 alkaline earth metal compounds Chemical group 0.000 description 1
- DCRIQAAPAFMPKP-UHFFFAOYSA-N aluminum oxygen(2-) titanium(4+) Chemical compound [O-2].[O-2].[Al+3].[Ti+4] DCRIQAAPAFMPKP-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009125 cardiac resynchronization therapy Methods 0.000 description 1
- 230000015556 catabolic process Effects 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
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Solid Thermionic Cathode (AREA)
- Electrodes For Cathode-Ray Tubes (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．〔従来の技術］
線状熱陰極を利川するｍ ｉｔｉｆ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特開昭６０−８４
７４４号に開示されている如きものがある．第３図はか
かる従来の平板型表示装置を示す模式的断面図であり、
この表示装置には、絶縁性基板１上に一定の間隔で設け
た複数の金属製係止部２上にかけ渡して、所定の間隔で
電子放射物質を保持させ陰極４Ｃを形威した陰極ワイヤ
ー３が設けられている．各陰極４Ｃと対応させ、上記絶
縁性基仮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４Ｃと対応した位置に貫通孔６
ａを備えたグリッド電極６、及びこのグリッド電極６の
上方に上記各陰極４Ｃに対応した位置に蛍光体７を塗布
したアノード８が夫々上，下方向に所要の間隔を隔てて
配設されている。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a linear hot cathode used in vacuum tubes, CRTs, fluorescent display tubes, etc. [Prior Art] Processing of a linear hot cathode Various types of mitif have been proposed in the past, for example, as a flat panel display device in JP-A-60-84.
There is something like the one disclosed in No. 744. FIG. 3 is a schematic cross-sectional view showing such a conventional flat panel display device.
This display device includes cathode wires 3 which are stretched over a plurality of metal locking portions 2 provided at regular intervals on an insulating substrate 1 and hold electron emitting substances at prescribed intervals to form cathodes 4C. is provided. A control electrode 5 is provided on the insulating substrate 1 in correspondence with each cathode 4C, and a through hole 6 is provided above the cathode wire 3 at a position corresponding to each cathode 4C.
a, and anodes 8 coated with phosphor 7 at positions corresponding to the respective cathodes 4C are disposed above the grid electrode 6 at required intervals in the upward and downward directions, respectively. There is.
前記陰極ワイヤー３はタングステン製であり、また陰極
４ｃ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，ストロンチウム カルシウムの三
元炭酸塩（ （ Ｂ ａ ＋ Ｓ ｒ ＋ Ｃ ａ ）
Ｃ ０ ３ ）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，Ｓｒ．Ｃａ） Ｏ ）に変換してある．な
お、この際上記陰極ワイヤー３のタングステンが、以下
のような反応で電子放射物質中のＢａＯを還元して過剰
Ｂａを生威ずる。このＢａは拡敗時に陰極表面へ移動し
、ＢａＯ中でドナーを形威し工兆ノションに寄与する。The cathode wire 3 is made of tungsten, and the cathode 4c is made of ternary carbonate of barium, strontium, and calcium ((B a + S r + C a ) by electrodeposition or coating on the surface of the cathode wire 3.
C 0 3 ) is deposited and thermally decomposed in the process of evacuating the inside of the display device container, converting the carbonate into an oxide ((Ba, Sr.Ca) O 2 ). At this time, the tungsten of the cathode wire 3 reduces BaO in the electron emitting material through the following reaction to produce excess Ba. This Ba moves to the surface of the cathode during the breakdown, forms a donor in BaO, and contributes to the production.
６ＢａＯ ＋ Ｗ −＋Ｂａ＊ＷＪ ＋ ３Ｂａ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゜Ｃに加熱すると陰極４０表面から電子が
放射される。このときグリンド電極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４０周辺の電界が陰
極４Ｃに対して負となり、陰極４Ｃからの電子放射を停
止せしめ得るから、例えば制？ｌｌｔ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
ることになる．
ところでかかる線状熱陰極は、上記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、表示装置の輝度が低くなっ
たり、表示装置の製造排気工程に長時間を要するなどの
問題点があった。6BaO + W −+Ba*WJ + 3Ba 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 40. At this time, if a positive electrode is applied to the grind 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, when a negative voltage is applied to the control electrode 5, the electric field around the cathode 40 becomes negative with respect to the cathode 4C, and electron emission from the cathode 4C can be stopped. By applying a positive pulse voltage to the llt pole 5, the emission of the electron beam can be controlled. By the way, such a linear hot cathode is used in the process of replacing the carbonate with an oxide or during the initial operation of a display device. Due to the influence of impure gas emitted from the locking portion 2 and the like, there are problems such as the initial emission current becomes low, the brightness of the display device becomes low, and the manufacturing exhaust process of the display device requires a long time.
先に発明者等は上記のような問題を解決するものとして
、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
属表面に保持した線状熱陰極を提案し多大の戒果を収め
た（特東貞昭６２ − １２２０５３号）．
〔発明が解決しようとする課題〕
そして継続してかかる線状熱陰極に関して研究開発を行
っていたところ、上記反応式にまり生威するＢａｓ［ｌ
ｉは、経時的に耐熱金属及び電子放射物質の界面に蓄積
されて両者を隔てることにもなり、その結果遇剰Ｂａの
生成を妨げる恐れがあり寿命特性を低下させる一つの原
因になることが確認された．
そして一般に、表示明るさ向上のためには、電子放出量
ア・ンプをはかるべく動作温度の上昇（例えば８００゜
Ｃ）が望まれるが、かかる動作温度上界は上記反応の促
進により前記ａａｓＷＯｉの生成を増加させ上述の寿命
特性の一層の低下を招くことになっていた。Previously, the inventors proposed a mixture containing 0.2 to 20% by weight of a rare earth metal oxide and an alkaline earth metal oxide containing barium oxide as a solution to the above problems. He proposed a linear hot cathode in which an electron-emitting substance with a weight ratio of barium oxide to rare earth metal oxide of 0.4 to 60 was held on the surface of a linear heat-resistant metal, and achieved great results (Sadaaki Tokuto 62-122053). [Problem to be solved by the invention] As we continued to conduct research and development on such linear hot cathodes, we discovered that Bas[l
Over time, i accumulates at the interface between the heat-resistant metal and the electron-emitting material, separating the two, which may hinder the generation of excess Ba and become one of the causes of deterioration of life characteristics. confirmed. In general, in order to improve display brightness, it is desired to raise the operating temperature (e.g., 800°C) in order to increase the amount of electron emission. This resulted in increased generation and further deterioration of the above-mentioned life characteristics.
ここに発明者等はかかるｒｊＩ題に鑑み鋭意研究を重ね
た結果この発明に到達したのである．（課題を解決する
ための手段〕
この発明の線状熱陰極は、線状の耐熱性金属上に、第１
層として少なくともバリウムを含むアルカリ土類金属酸
化物に酸化アルミニウム，酸化チタン 酸化ハフニウム
酸化シリコン，酸化ニオブ，酸化ジルコニウムの少な
くとも１種を混合したものを被着し、さらにこの第１屡
の上に少なくともバリウムを含むアルカリ土類金属酸化
物に酸化スカンジウムを混合した第２層を被着形威した
ものである．
〔作 用〕
この発明においては上記の如く、陰極ケーブルとして例
えばタングステン金属が用いられ、その上に第１層及び
第２層からなる電子放射物質が被着されている．
従って両者の界面において、タングステンに接する上述
のＢａＯの粒子間に例えば第１層中に含有させた反応に
関与しないＺｒＯよ粒子が適当に入り込むような状態と
なって、前記ｆｌａ（＋のタングステンに対する接触量
を適切に減少させている。The inventors have arrived at this invention as a result of intensive research in view of the rjI problem. (Means for Solving the Problems) The linear hot cathode of the present invention has a first
A mixture of at least one of aluminum oxide, titanium oxide, hafnium oxide, silicon oxide, niobium oxide, and zirconium oxide is deposited on an alkaline earth metal oxide containing at least barium as a layer, and further on this first layer, at least The second layer is a mixture of barium-containing alkaline earth metal oxide and scandium oxide. [Function] As described above, in this invention, for example, tungsten metal is used as the cathode cable, and the electron emitting material consisting of the first layer and the second layer is deposited thereon. Therefore, at the interface between the two, the above-mentioned BaO particles in contact with tungsten are in a state where, for example, ZrO particles that are not involved in the reaction and are contained in the first layer are appropriately inserted, and the fla(+) The amount of contact is appropriately reduced.
その結果上記式で示した反応速度をこの接触量減少分だ
け遅くすることができ、ＢａＪＯ＊の生成を抑制し得る
ことになる．このことは動作瓜度の上昇時において反応
が促進され上記問題の発生の好適に回避する作用を示す
。As a result, the reaction rate shown in the above formula can be slowed down by the amount of this contact reduction, and the formation of BaJO* can be suppressed. This shows that the reaction is accelerated when the degree of action increases, and the above-mentioned problem can be preferably avoided.
〔実施例〕 以下実施例によりこの発明を具体的に説明する。〔Example〕 The present invention will be specifically explained below with reference to Examples.
第１図及び第２図は、この発四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及び一
部拡大断面図であり、図中１はガラス板、セラミック板
等で構威した絶縁性基板、２は主として金属製の突起又
はリブ等として形威される係止部、３はタングステン等
の耐熱性金属による陰極ワイヤー ４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後述する第１
層４ａ及び第２層４ｂからなる陰極、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。1 and 2 are a schematic cross-sectional view and a partially enlarged cross-sectional view showing the main parts of a display device using a linear hot cathode according to an embodiment of this invention, and 1 in the figure is a glass plate. , an insulating substrate made of a ceramic plate or the like, 2 a locking part mainly shaped as a metal protrusion or rib, 3 a cathode wire made of a heat-resistant metal such as tungsten, and 4 a cathode wire 3.
The first grooves, which will be described later, are formed at required intervals in the longitudinal direction.
A cathode consisting of a layer 4a and a second layer 4b, 5 a control electrode, 6
8 indicates a grid electrode, and 8 indicates an anode.
上記絶縁性基板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が、これ
に形成した上記構成の陰８ｉｉ４が相隣する係止部２．
２間に位置するよう張架されている。絶縁性基板ｌ上に
は前記各陰極４と対向する位置に制御電極５を配設し、
また、陰極ワイヤー３の上方には前記陰極４と対向する
位置に貫通孔６ａを開口したグリッド電極６が、更にそ
の上には前記陰極４と対向する位置に蛍光体７を付した
アノード８が夫々上下方向に間隔をおいて配設されてい
る．
以上のような構戒は、実質的には陰極４を除き第３図の
従来品と略同一である。A plurality of locking portions 2 are provided at regular intervals on the insulating substrate 1, and the cathode wire 3 is passed to each of the locking portions 2 at a locking portion where the shadows 8ii4 having the above structure formed thereon are adjacent to each other. 2.
It is strung up so that it is located between the two. A control electrode 5 is arranged on the insulating substrate l at a position facing each of the cathodes 4,
Further, above the cathode wire 3, there is a grid electrode 6 having a through hole 6a at a position facing the cathode 4, and further above the grid electrode 6, an anode 8 having a phosphor 7 attached at a position facing the cathode 4. They are arranged at intervals in the vertical direction. The construction as described above is substantially the same as the conventional product shown in FIG. 3, except for the cathode 4.
陰極ワイヤーとしては概ねタングステンが用いられるが
、他に主戒分をＭｏ， Ｔａなどとした耐熱性金属も用
いられる。Tungsten is generally used as the cathode wire, but other heat-resistant metals whose main constituents are Mo, Ta, etc. are also used.
次に陰極４としては、第１層４ａ及び第２ Ｉｒ！Ｊ４
ｂ共に少なくとも酸化バリウムを含むバリウム．スト
ロンチウム，カルシウムなどアルカリ土頚金属化合物を
主成分としてなる電子放射物質による電着液が用いられ
る。具体的には、Ｂａｄ： ６ ４ ， ＳｒＯ：３２
，ＣａＯ：４各重量％のものが挙げられる。Next, as the cathode 4, the first layer 4a and the second Ir! J4
Barium containing at least barium oxide. An electrodeposition solution using an electron-emitting substance whose main component is an alkaline earth metal compound such as strontium or calcium is used. Specifically, Bad: 6 4, SrO: 32
, CaO: 4% by weight.
第１層４ａは、上記電着液に酸化アルミニウム酸化チタ
ン．酸化ハフニウム，酸化シリコン，酸化ニオプ．酸化
ジルコニウムのいづれか１種又は２種以上を２〜１０重
量％の範囲で混入する。The first layer 4a is made of aluminum oxide titanium oxide in the electrodeposition liquid. Hafnium oxide, silicon oxide, niopium oxide. One or more zirconium oxides are mixed in an amount of 2 to 10% by weight.
上記酸化物は、いつれも耐熱性が高くしかも上記式の反
応に全く関与しないものであり、特に酸化ジルコニウム
はかかる目的に好適である。又これら酸化物の混入量が
、上記下限未満ではこの発明の目的に適合不充分となり
、又上限を超えると被着特性が低下し、いづれも好まし
くない。All of the above oxides have high heat resistance and do not participate in the reaction of the above formula at all, and zirconium oxide is particularly suitable for this purpose. If the amount of these oxides is less than the above-mentioned lower limit, it will not be sufficient to meet the objectives of the present invention, and if it exceeds the upper limit, the adhesion properties will deteriorate, both of which are undesirable.
次に上記第１層４ａ上に重ねて被着する第２層４ｂは、
上記と同様の電着液に、酸化スカンジウム０．２〜２０
重量％を混入するのである。Next, the second layer 4b that is deposited on top of the first layer 4a is:
Add 0.2 to 20 scandium oxide to the same electrodeposition solution as above.
% by weight.
？昆大量が０．２重量％未満では、この発明の効果が得
られず、又２０重量％を超えると被膜特性が低下してし
まいいづれも好ましくない。? If the amount of microorganisms is less than 0.2% by weight, the effects of the present invention cannot be obtained, and if it exceeds 20% by weight, the film properties will deteriorate, which is not preferable.
これら第Ｉ Ｎ ４ ａ及び第２層４ｂを、従来と同様
の電着法により膜厚約８−で陰極ワイヤー３上に保持さ
せ各陰極４を形成した。The I N 4 a and the second layer 4b were held on the cathode wire 3 to a film thickness of approximately 8 mm by the same electrodeposition method as in the prior art to form each cathode 4.
次にこれを表示装置の排気過程において加熱し、炭酸塩
（Ｂａ．Ｓｒ，Ｃａ）ＣＯａ−Ｓｃｚ（ＣＯｓ）ｚを（
Ｂａ，Ｓｒ，Ｃａ）ＯＳｃ■ｏ３に変え組戒比の異る陰
極を有する表示装置を作成した．
実際に、上記陰極ワイヤーとしてタングステンワイヤー
を用い、それら表示装置の高輝度特性維持時間を測定し
た．
陰極４中への酸化物混入量重量％は以下の通りとした．
実施例ｌ及び２は共に陰極ワイヤー動作温度８００゜Ｃ
，比較例品は７００℃とした．
その結果いづれも寿命７０００時間を確保することがで
きた。Next, this is heated in the exhaust process of the display device to convert carbonate (Ba.Sr,Ca)COa-Scz(COs)z into (
(Ba, Sr, Ca)OSc■o3, and a display device having a cathode with a different combination ratio was created. In fact, we used tungsten wire as the cathode wire and measured the high brightness characteristic maintenance time of these display devices. The weight percent of the oxide mixed into the cathode 4 was as follows. In both Examples 1 and 2, the cathode wire operating temperature was 800°C.
The temperature for the comparative example was 700°C. As a result, we were able to secure a lifespan of 7,000 hours for all of them.
以上説明したようにこの発明の陰極は、表示装置の動作
温度上昇による高輝度化及び電子管装置などの高性能化
を長期に維持する等長寿命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 excellent effects in increasing the operating temperature of display devices to increase brightness and maintaining the high performance of electron tube devices and the like for a long period of time, thereby extending the life of the cathode.
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図は同陰極部分の拡大（ｔｌｒ面図、第３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、３ｂ・・・陰極
タングステンワイヤー ４・・・陰極、４ａ・・・第１
層、４ｂ・・・第２層、５・・・制ｉｌｌ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．Fig. 1 is a schematic cross-sectional view of a display device using the product of the present invention, Fig. 2 is an enlarged view of the cathode portion (tlr view), and Fig. 3 is a schematic cross-sectional view showing a conventional display device. ... Insulating substrate, 2 ... Locking part, 3b ... Cathode tungsten wire 4 ... Cathode, 4a ... First
Layer, 4b...Second layer, 5...Control electrode, 6...
- Grid electrode, 7...phosphor, 8... anode. In addition, the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
ウムを含むアルカリ土類金属酸化物に酸化アルミニウム
、酸化チタン、酸化ハフニウム、酸化シリコン、酸化ニ
オブ、酸化ジルコニウムの少なくとも１種を混合したも
のを被着し、さらにこの第１層の上に少なくともバリウ
ムを含むアルカリ土類金属酸化物に酸化スカンジウムを
混合した第２層を被着形成したことを特徴とする線状熱
陰極。A first layer on a linear heat-resistant metal is a mixture of an alkaline earth metal oxide containing at least barium and at least one of aluminum oxide, titanium oxide, hafnium oxide, silicon oxide, niobium oxide, and zirconium oxide. A linear hot cathode characterized in that a second layer of a mixture of scandium oxide and an alkaline earth metal oxide containing at least barium is further deposited on the first layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1191971A JPH0355734A (en) | 1989-07-24 | 1989-07-24 | Linear hot cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1191971A JPH0355734A (en) | 1989-07-24 | 1989-07-24 | Linear hot cathode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0355734A true JPH0355734A (en) | 1991-03-11 |
Family
ID=16283488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1191971A Pending JPH0355734A (en) | 1989-07-24 | 1989-07-24 | Linear hot cathode |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0355734A (en) |
-
1989
- 1989-07-24 JP JP1191971A patent/JPH0355734A/en active Pending
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