JPS645741B2 - - Google Patents
Info
- Publication number
- JPS645741B2 JPS645741B2 JP5813479A JP5813479A JPS645741B2 JP S645741 B2 JPS645741 B2 JP S645741B2 JP 5813479 A JP5813479 A JP 5813479A JP 5813479 A JP5813479 A JP 5813479A JP S645741 B2 JPS645741 B2 JP S645741B2
- Authority
- JP
- Japan
- Prior art keywords
- graphite
- resistance
- contact
- coating
- graphite coating
- 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
- 229910002804 graphite Inorganic materials 0.000 claims description 61
- 239000010439 graphite Substances 0.000 claims description 61
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 60
- 238000000576 coating method Methods 0.000 claims description 47
- 239000011248 coating agent Substances 0.000 claims description 45
- 235000019353 potassium silicate Nutrition 0.000 claims description 11
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 7
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 description 15
- 238000000034 method Methods 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 235000019794 sodium silicate Nutrition 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/96—One or more circuit elements structurally associated with the tube
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Description
【発明の詳細な説明】
本発明は陰極線管、特に管内壁面に塗布形成さ
れた導電性黒鉛被膜（以下黒鉛被膜と称する）の
構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cathode ray tube, and particularly to the structure of a conductive graphite coating (hereinafter referred to as graphite coating) coated on the inner wall surface of the tube.
通常、陰極線管のフアンネル部内壁面には黒鉛
被膜が被着形成されており、この黒鉛被膜は、高
電圧が印加されて電子ビームを加速する機能、シ
ヤドウマスクなどの電極から発生した２次電子を
捕集して２次電子による色純度の劣化を防止する
機能および電子銃構体とシヤドウマスクとにアノ
ードボタンに印加された高電圧を供給する機能な
ど種々の重要な機能を果すものであり、ガス放出
および吸着能など管内真空度に悪影響を与えない
ことが要求されている。一方、この黒鉛被膜は、
次のような方法によりバルブのフアンネル部内壁
面に被着形成される。すなわち、陰極線管を構成
するフアンネル部内壁面を例えば弗化水素などの
洗浄剤を用いて洗浄し、乾燥した後、この内壁面
の所定部分に対し黒鉛中にバインダーとして例え
ば珪酸カリ、珪酸ソーダ、珪酸リチウムなどのよ
うな珪酸塩を一定の割合で添加調合した黒鉛塗料
を刷子塗り法あるいはスプレー法などの塗布手段
を用いて塗布した後、熱処理を施して黒鉛被膜を
形成する。 Usually, a graphite coating is formed on the inner wall surface of the funnel part of a cathode ray tube. It performs various important functions such as preventing deterioration of color purity due to secondary electrons and supplying the high voltage applied to the anode button to the electron gun structure and shadow mask. It is required that the vacuum level inside the tube, such as adsorption capacity, not be adversely affected. On the other hand, this graphite coating
It is deposited on the inner wall surface of the funnel portion of the bulb by the following method. That is, after cleaning the inner wall surface of the funnel portion constituting the cathode ray tube using a cleaning agent such as hydrogen fluoride and drying, a binder such as potassium silicate, sodium silicate, or silicic acid is applied to a predetermined portion of the inner wall surface in graphite. A graphite paint prepared by adding a silicate such as lithium in a certain proportion is applied using a coating method such as a brush coating method or a spray method, and then heat-treated to form a graphite coating.
このように構成された陰極線管は、フアンネル
中央部にこの黒鉛被膜に接触して外部から高電圧
を導入する高電圧導入部材としてのアノードボタ
ンが埋設され、また、ネツク部には電子銃構体の
最終電極に接続された高電圧導入部材としての高
電圧導入用バルブスペーサコンタクトが接触配置
され、さらに、フアンネルスカート部にはシヤド
ウマスクに接続された高電圧導入部材としての高
電圧導入用コンタクトスプリングが接触配置され
て外部高電圧発生回路から約25KV程度の高電圧
がアノードボタン、バルブスペーサコンタクトお
よびコンタクトスプリングなどの高電圧導入部材
を介して電子銃構体およびシヤドウマスクにそれ
ぞれ導入される。 The cathode ray tube constructed in this way has an anode button embedded in the center of the funnel as a high voltage introduction member that contacts the graphite coating and introduces high voltage from the outside, and the electron gun structure is embedded in the neck part. A valve spacer contact for high voltage introduction as a high voltage introduction member connected to the final electrode is arranged in contact with it, and a contact spring for high voltage introduction as a high voltage introduction member connected to the shadow mask is further provided in the funnel skirt part. A high voltage of approximately 25 KV is introduced into the electron gun assembly and the shadow mask from an external high voltage generation circuit which are arranged in contact with each other through high voltage introducing members such as an anode button, a valve spacer contact, and a contact spring.
しかしながら、上記黒鉛被膜には、電子銃構体
およびシヤドウマスクに高電圧を導入するバルブ
スペーサコンタクトおよびコンタクトスプリング
がそれぞれ接触配置される構造を有しているた
め、動作時にその当接部分において管内放電が発
生する。 However, since the above-mentioned graphite coating has a structure in which the valve spacer contacts and contact springs that introduce high voltage to the electron gun structure and the shadow mask are placed in contact with each other, discharge inside the tube occurs at the contact parts during operation. do.
したがつて、このような管内放電の発生率を減
少させようとしたものとしては、例えば電子銃構
体をフアンネル部に封止する前にバルブに衝撃を
与えることによつてバルブ内のゴミ等の異物を除
去させたり、ネツク部を再洗浄させたりあるいは
強固な黒鉛被膜を形成して当接部分の削れを防止
させたりする方法等種々の手段によつて処置して
いた。 Therefore, attempts to reduce the incidence of such intra-tube discharge include, for example, applying an impact to the bulb before sealing the electron gun assembly in the funnel to remove dust and other particles inside the bulb. Various methods have been used to treat the problem, such as removing foreign matter, re-cleaning the neck, or forming a strong graphite film to prevent the abutment area from being scraped.
一方、このような管内放電の発生は、高電圧発
生回路からアノードボタン−黒鉛被膜−バルブス
ペーサコンタクト−電子銃構体を介して電子銃回
路に約500A以上の大電流が流れ、バルブスペー
サコンタクトとその当接する黒鉛被膜とを損傷さ
せ、電子銃回路に導入する電流を著しく低下させ
たり、電子銃構体に接続された電子銃回路を損傷
させていた。 On the other hand, the occurrence of such intra-tube discharge is caused by a large current of approximately 500 A or more flowing from the high voltage generation circuit to the electron gun circuit via the anode button - graphite coating - valve spacer contact - electron gun assembly, and the valve spacer contact and its This damages the contacting graphite coating, significantly lowering the current introduced into the electron gun circuit, and damaging the electron gun circuit connected to the electron gun assembly.
このような欠点を除去しようとしたものとして
は、Fe2O3、黒鉛、水ガラスを主成分とした高抵
抗値の黒鉛被膜をフアンネル部内壁面に塗布して
高抵抗値を持たせ、管内放電時に発生する大電流
を小さくさせた陰極線管が提案されている。 An attempt has been made to eliminate these defects by coating the inner wall of the funnel with a high-resistance graphite film containing Fe 2 O 3 , graphite, and water glass as the main components, thereby reducing the discharge inside the tube. Cathode ray tubes have been proposed that reduce the large currents that sometimes occur.
しかしながら上記構成による陰極線管は、高抵
抗値を有する黒鉛被膜に電子銃構体側のバルブス
ペーサコンタクトおよびシヤドウマスク側のコン
タクトスプリングが接触配置されるので、この当
接部分の接触抵抗が大きくなり、この部分におい
て管内放電のフラツシユオーバーによる高抵抗黒
鉛被膜の損傷により高電圧の導通不良を発生させ
ていた。特に電子銃構体での管内放電時のフラツ
ユオーバー電流を低く抑えるために黒鉛被膜の抵
抗値を高くしたものに著しい傾向を有していた。
この場合、フラツシユオーバ電流の対策前後では
黒鉛被膜の抵抗値を従来より約10倍程度大きくし
たが、バルブスペーサコンタクト、コンタクトス
プリングとの接触部では陰極線管の最終工程であ
るノツキング、エージング中の高電圧の導通が破
壊されることがあつた。 However, in the cathode ray tube with the above configuration, the valve spacer contact on the electron gun assembly side and the contact spring on the shadow mask side are arranged in contact with the graphite coating having a high resistance value, so the contact resistance of this contact area becomes large. In this case, the high-resistance graphite coating was damaged due to flashover of the discharge inside the tube, causing a high-voltage conduction failure. In particular, there was a remarkable tendency for the graphite coating to have a high resistance value in order to suppress the float-over current during tube discharge in the electron gun assembly.
In this case, the resistance value of the graphite coating was made about 10 times higher than before before and after countermeasures against flashover current, but at the contact area with the valve spacer contact and contact spring, the final process of the cathode ray tube is knocking and aging. High voltage continuity was sometimes destroyed.
したがつて本発明は、上記従来の欠点に着目し
てなされたものであり、その目的とするところ
は、黒鉛被膜とこの黒鉛被膜に接触する高電圧導
入部材との接触部間の導通不良を除去し、品質、
信頼性を向上させた陰極線管を提供することにあ
る。 Therefore, the present invention has been made in view of the above-mentioned drawbacks of the conventional art, and its purpose is to eliminate poor conduction between the contact portion between the graphite coating and the high voltage introducing member that contacts the graphite coating. remove quality,
An object of the present invention is to provide a cathode ray tube with improved reliability.
このような目的を達成するために本発明は、高
電圧導入部材が当接するフアンネル部内壁面上に
低抵抗黒鉛被膜を設けたものである。以下図面を
用いて本発明による陰極線管について詳細に説明
する。 In order to achieve such an object, the present invention provides a low-resistance graphite coating on the inner wall surface of the funnel portion, which the high voltage introduction member contacts. The cathode ray tube according to the present invention will be described in detail below with reference to the drawings.
図は本発明による陰極線管の一例を示す要部断
面図である。同図において、１はバルブのパネル
部、２はパネル部内壁面に被着形成されたけい光
膜、３はバルブのフアンネル部、４はフアンネル
部３に設けられかつ外部から高電圧を導入するア
ノードボタン、５はけい光膜２に対向配置された
シヤドウマスク、６はシヤドウマスク５に高電圧
を導入するコンタクトスプリング、７は電子銃構
体、８は電子銃構体７に高電圧を導入するバルブ
スペーサコンタクト、９はフアンネル部３の内壁
面に被着形成された高抵抗値を有する黒鉛被膜、
１０はフアンネル部３の内壁面上に高電圧導入部
材となるアノードボタン４、コンタクトスプリン
グ６、バルブスペーサコンタクト８の接触子が当
接する近傍部分に塗布して形成された低抵抗値を
有する黒鉛被膜である。この場合、上記高抵抗値
を有する黒鉛被膜９は、酸化チタンと黒鉛と水ガ
ラスとで主構成され、酸化チタンの添加量を多く
してその比抵抗が１〜1000Ω・cmとなるように形
成されている。一方、上記低抵抗値を有する黒鉛
被膜１０は、酸化チタンと黒鉛と水ガラスまたは
黒鉛と水ガラスとで主構成され、黒鉛の添加量を
多くしてその比抵抗が0.001〜0.4Ω・cmとなるよ
うに形成されている。またこの場合、高抵抗黒鉛
被膜９と低抵抗黒鉛被膜１０との接続部は５〜10
mmの幅でで互いに重なり合うように塗り分けられ
ている。そして、低抵抗黒鉛被膜１０を塗布する
範囲は、上記重なり部を除き、コンタクトスプリ
ング６部およびアノードボタン４部では夫々製造
上４cm2以上の矩形状または円形状が望ましいが、
塗布面積を広げることにより円環状に塗布しても
良い。また、バルブスペーサコンタクト８部では
ネツク部内壁面に円環状を塗布することが望まし
く、この場合の塗布範囲は、電子銃構体７側の黒
鉛被膜９端からバルブスペーサコンタクト８の接
点部までの寸法よりさらに５mm以上あれば良い。
したがつて、この場合、バルブスペーサコンタク
ト８の形状により所要塗布範囲が変ることは明白
である。 The figure is a sectional view of essential parts showing an example of a cathode ray tube according to the present invention. In the figure, 1 is a panel part of the bulb, 2 is a fluorescent film formed on the inner wall surface of the panel part, 3 is a funnel part of the bulb, and 4 is an anode provided in the funnel part 3 and which introduces a high voltage from the outside. a button, 5 a shadow mask disposed opposite to the fluorescent film 2, 6 a contact spring for introducing high voltage into the shadow mask 5, 7 an electron gun assembly, 8 a valve spacer contact for introducing high voltage into the electron gun assembly 7; 9 is a graphite coating having a high resistance value and formed on the inner wall surface of the funnel portion 3;
Reference numeral 10 denotes a graphite coating having a low resistance value, which is formed on the inner wall surface of the funnel portion 3 in the vicinity of the areas in contact with the contacts of the anode button 4, contact spring 6, and valve spacer contact 8, which serve as high voltage introduction members. It is. In this case, the graphite film 9 having a high resistance value is mainly composed of titanium oxide, graphite, and water glass, and is formed by adding a large amount of titanium oxide so that its specific resistance is 1 to 1000 Ω·cm. has been done. On the other hand, the graphite coating 10 having a low resistance value is mainly composed of titanium oxide, graphite, and water glass, or graphite and water glass, and has a specific resistance of 0.001 to 0.4 Ω·cm by increasing the amount of graphite added. It is formed to be. Further, in this case, the number of connections between the high-resistance graphite film 9 and the low-resistance graphite film 10 is 5 to 10.
The colors are divided into mm widths and overlap each other. The area to which the low-resistance graphite coating 10 is applied is preferably a rectangular or circular shape of 4 cm 2 or more for the contact spring 6 part and the anode button 4 part, respectively, except for the above-mentioned overlapping part.
The coating may be applied in an annular shape by widening the coating area. In addition, it is desirable to apply an annular coating to the inner wall surface of the neck part of the valve spacer contact 8, and in this case, the application range is smaller than the dimension from the end of the graphite coating 9 on the electron gun assembly 7 side to the contact part of the valve spacer contact 8. Furthermore, it is good if it is 5 mm or more.
Therefore, in this case, it is clear that the required coating range changes depending on the shape of the valve spacer contact 8.
このような構成によれば、コンタクトスプリン
グ６およびバルブスペーサコンタクト８の接触子
が当接するフアンネル部３の内壁部分には、被膜
強度の比較的弱い高抵抗黒鉛被膜９がなく、機械
的強度の大きい低抵抗黒鉛被膜１０が形成されて
いるため、コンタクトスプリング６、バルブスペ
ーサコンタクト８の接触による黒鉛被膜１０の剥
れがなくなり、管内放電を防止できる。また、接
触抵抗が低いのでノツキング処理等による接触部
分の損傷がなくなり、高電圧の導通不良が皆無と
なる。また、アノードボタン４の近傍に低抵抗黒
鉛被膜１０を形成したことによつて、従来の高抵
抗黒鉛被膜９に発生し易かつたアノードボタン４
と高抵抗黒鉛被膜９間の高抵抗値差によつて生ず
る局部発熱によるアノードボタン４の高電圧導通
不良を改善することができた。 According to such a configuration, the inner wall portion of the funnel portion 3 that contacts the contacts of the contact spring 6 and the valve spacer contact 8 does not have the high-resistance graphite coating 9, which has a relatively weak coating strength, and has a high mechanical strength. Since the low-resistance graphite coating 10 is formed, peeling of the graphite coating 10 due to contact between the contact spring 6 and the valve spacer contact 8 is eliminated, and discharge within the tube can be prevented. Furthermore, since the contact resistance is low, there is no damage to the contact portion due to knocking treatment, etc., and there is no high voltage conduction failure. In addition, by forming the low resistance graphite coating 10 near the anode button 4, the anode button 4
It was possible to improve the high voltage conduction failure of the anode button 4 due to local heat generation caused by the high resistance value difference between the anode button 4 and the high resistance graphite coating 9.
なお、上記実施例においては、高抵抗黒鉛被膜
を酸化チタンと黒鉛と水ガラスとから構成し、低
抵抗黒鉛被膜を酸化チタンと黒鉛と水ガラスまた
は黒鉛と水ガラスとから構成した場合についてて
説明したが、本発明はこれに限定されるものでは
なく、黒鉛被膜の高抵抗部を比抵抗１〜1000Ω・
cmの半導体ガラスで構成し低抵抗部を比抵抗0.1
Ω・cm以下の銀ペーストで構成しても前述と同様
の効果が得られる。この場合、銀ペーストの一例
としてシルベストＰ−255（商品名(株)徳力化学研究
所製造）を用いたところ効果的であつた。これは
比抵抗値の他に被膜の弾力性に寄因する接触面積
の増加すなわち接触抵抗の低減が挙げられる。ま
た、半導体ガラスの一例としては主成分として
V2O5（60モル％）−BaO（10モル％）−P2O5（30モ
ル％）系のガラスを用いバインダーとして酢酸ブ
チル：ニトロセルロースから成るビヒクルを用い
て調合したものを用いたが、ガラスの熱膨脹係数
は95×10-7／℃程度でこれはフアンネルの熱膨脹
係数97×10-7／℃とほぼ同じであり、これはブラ
ウン管の製造工程中に結晶化し従来の黒鉛被膜の
ような剥離現象がないという利点があつた。 In the above embodiments, the case where the high-resistance graphite coating is composed of titanium oxide, graphite, and water glass, and the low-resistance graphite coating is composed of titanium oxide, graphite, and water glass, or graphite and water glass is explained. However, the present invention is not limited to this, and the high resistance part of the graphite coating has a specific resistance of 1 to 1000Ω.
Constructed of cm semiconductor glass, the low resistance part has a specific resistance of 0.1
The same effect as described above can be obtained even by using a silver paste of Ω·cm or less. In this case, it was effective to use Sylvest P-255 (trade name, manufactured by Tokuriki Kagaku Kenkyujo Co., Ltd.) as an example of a silver paste. This is due to an increase in the contact area, ie, a reduction in contact resistance, due to the elasticity of the coating in addition to the specific resistance value. In addition, as an example of semiconductor glass, the main component is
A product prepared using V 2 O 5 (60 mol %) - BaO (10 mol %) - P 2 O 5 (30 mol %) glass and a vehicle consisting of butyl acetate:nitrocellulose as a binder was used. However, the coefficient of thermal expansion of glass is about 95×10 -7 /℃, which is almost the same as the coefficient of thermal expansion of funnels, 97×10 -7 /℃. It has the advantage that there is no such peeling phenomenon.
以上説明したように本発明による陰極線管は、
高抵抗黒鉛被膜の高電圧導入部材接触子と当接す
る近傍に高抵抗黒鉛被膜よりも抵抗値の低い低抵
抗黒鉛被膜を被着形成したことによつて、この高
電圧接続部間に生じる管内放電を防止させるとと
もに導通不良が皆無となり、陰極線管の品質およ
び信頼性を大幅に向上させることができる極めて
優れた効果が得られる。 As explained above, the cathode ray tube according to the present invention has
Due to the formation of a low resistance graphite coating with a lower resistance value than the high resistance graphite coating in the vicinity of the contact with the high voltage introduction member contact of the high resistance graphite coating, an intra-tube discharge occurs between the high voltage connections. In addition, there is no conduction failure, and the quality and reliability of the cathode ray tube can be significantly improved.
図は本発明による陰極線管の一例を示す要部断
面図である。
１……パネル部、２……けい光膜、３……フア
ンネル部、４……アノードボタン、５……シヤド
ウマスク、６……コンタクトスプリング、７……
電子銃構体、８……バルブスペーサコンタクト、
９……高抵抗黒鉛被膜、１０……低抵抗黒鉛被
膜。
The figure is a sectional view of essential parts showing an example of a cathode ray tube according to the present invention. DESCRIPTION OF SYMBOLS 1... Panel part, 2... Luminescent film, 3... Funnel part, 4... Anode button, 5... Shadow mask, 6... Contact spring, 7...
Electron gun structure, 8...valve spacer contact,
9...High resistance graphite coating, 10...Low resistance graphite coating.
Claims (1)
黒鉛被膜と、前記黒鉛被膜に接触して配置された
高電圧導入部材と、前記黒鉛被膜の前記導入部材
接触子と当接する近傍に前記黒鉛被膜よりも抵抗
値の低い低抵抗黒鉛被膜を被着形成した陰極線管
において、前記高抵抗黒鉛被膜を酸化チタンと黒
鉛と水ガラスとにより構成しその比抵抗を１〜
1000Ω・cmとし、前記低抵抗黒鉛被膜を酸化チタ
ンと黒鉛と水ガラスもしくは黒鉛と水ガラスとに
より構成しその比抵抗を0.001〜0.4Ω・cmとした
ことを特徴とする陰極線管。 ２ 前記高抵抗黒鉛被膜を半導体ガラスにより構
成しその比抵抗を１〜1000Ω・cmとし、前記低抵
抗黒鉛被膜を銀ペーストで構成しその比抵抗を
0.1Ω・cm以下としたことを特徴とする特許請求
の範囲第１項記載の陰極線管。[Scope of Claims] 1. A high-resistance graphite coating formed on the inner wall surface of the funnel portion, a high voltage introduction member disposed in contact with the graphite coating, and abutting with the introduction member contact of the graphite coating. In a cathode ray tube in which a low-resistance graphite film having a resistance value lower than that of the graphite film is formed nearby, the high-resistance graphite film is composed of titanium oxide, graphite, and water glass, and its specific resistance is 1 to 1.
1000 Ω·cm, and the low-resistance graphite coating is composed of titanium oxide, graphite, and water glass, or graphite and water glass, and has a specific resistance of 0.001 to 0.4 Ω·cm. 2. The high-resistance graphite film is made of semiconductor glass and has a specific resistance of 1 to 1000 Ω·cm, and the low-resistance graphite film is made of silver paste and has a specific resistance of 1 to 1000 Ω·cm.
The cathode ray tube according to claim 1, characterized in that the resistance is 0.1 Ω·cm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5813479A JPS55150539A (en) | 1979-05-14 | 1979-05-14 | Cathode-ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5813479A JPS55150539A (en) | 1979-05-14 | 1979-05-14 | Cathode-ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55150539A JPS55150539A (en) | 1980-11-22 |
| JPS645741B2 true JPS645741B2 (en) | 1989-01-31 |
Family
ID=13075507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5813479A Granted JPS55150539A (en) | 1979-05-14 | 1979-05-14 | Cathode-ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55150539A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5682555A (en) * | 1979-12-07 | 1981-07-06 | Toshiba Corp | Cathode ray tube |
| JPS58176854A (en) * | 1982-04-09 | 1983-10-17 | Hitachi Ltd | Color crt |
| US4602187A (en) * | 1984-06-28 | 1986-07-22 | North American Philips Consumer Electronics Corp. | Color CRT with composite arc suppression structure |
| KR900006174B1 (en) * | 1985-01-31 | 1990-08-24 | 히타찌 훈마쯔 야킨 가부시끼가이샤 | Cathode ray tubes and coating materials therefor |
| JP3591353B2 (en) * | 1999-01-28 | 2004-11-17 | 松下電器産業株式会社 | Color cathode ray tube and method of manufacturing the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS548363U (en) * | 1977-06-20 | 1979-01-19 | ||
| JPS54157468A (en) * | 1978-06-02 | 1979-12-12 | Hitachi Ltd | Interior conducting coat of cathode-ray tube |
| JPS551010A (en) * | 1978-06-16 | 1980-01-07 | Hitachi Ltd | Color braun tube |
| JPS5581451A (en) * | 1978-12-14 | 1980-06-19 | Matsushita Electronics Corp | Color picture tube |
| JPS6131584A (en) * | 1984-07-20 | 1986-02-14 | 松下電工株式会社 | Housing assembly |
-
1979
- 1979-05-14 JP JP5813479A patent/JPS55150539A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55150539A (en) | 1980-11-22 |
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