JPH0359542B2 - - Google Patents
Info
- Publication number
- JPH0359542B2 JPH0359542B2 JP55125985A JP12598580A JPH0359542B2 JP H0359542 B2 JPH0359542 B2 JP H0359542B2 JP 55125985 A JP55125985 A JP 55125985A JP 12598580 A JP12598580 A JP 12598580A JP H0359542 B2 JPH0359542 B2 JP H0359542B2
- Authority
- JP
- Japan
- Prior art keywords
- conductive film
- parts
- graphite
- funnel
- ray 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.)
- Expired - Lifetime
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 229910002804 graphite Inorganic materials 0.000 claims description 17
- 239000010439 graphite Substances 0.000 claims description 17
- 229910044991 metal oxide Inorganic materials 0.000 claims description 14
- 150000004706 metal oxides Chemical class 0.000 claims description 14
- 239000002245 particle Substances 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 235000012239 silicon dioxide Nutrition 0.000 claims description 9
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 6
- 239000003973 paint Substances 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 11
- 238000000576 coating method Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- -1 weight ratios Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910000040 hydrogen fluoride Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 229910052912 lithium silicate Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 159000000001 potassium salts Chemical class 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
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000005507 spraying Methods 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
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
Landscapes
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Description
本発明はカラーブラウン管、特にフアンネル部
内壁面に被着形成された高抵抗内装導電膜に関す
るものである。
通常、カラーブラウン管のフアンネル部内壁面
には、黒鉛を主成分とする導電性の内装導電膜が
被着形成されており、この内装導電膜は、高電圧
端子を介して外部より高電圧が印加されてシヤド
ウマスク、けい光面およびフアンネルネツク部内
に封入されている電子銃に高電圧を供給する導体
としての機能、フアンネル部外壁面に塗布されて
いる外装導電膜とともにコンデンサを形成する機
能および黒鉛のガス吸着特性によるゲツタ機能等
の種々の機能を有している。一方、この内装導電
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、カラーブ
ラウン管を構成するバルブのフアンネル部内壁面
を例えば弗化水素水溶液などの洗浄剤を用いて洗
浄し、乾燥した後、例えば珪酸カリウム、珪酸ナ
トリウムまたは珪酸リチウムなどのバインダを含
んだ導電塗料をスプレー法、刷毛塗り法または流
し塗り法などにより塗布した後、さらに400〜450
℃の熱処理を施して内装導電膜が形成されるのが
一般的である。
従来、カラーブラウン管動作時に電子銃でスパ
ークが発生した場合には、内装導電膜と外装導電
膜の間に形成されているコンデンサから大電流が
流れてカソードを損傷させたり、電子銃回路の
IC，トランジスタ等を破壊させたりすることが
知られている。これに対して、スパークギヤツプ
を用いて回路側の保護を計る方法、内装導電膜、
マウント等の上記スパーク経路の一部を高抵抗体
とすることによる保護法が実用化されている。本
発明は、特に後者に関し、高抵抗値を有する内装
導電膜の改良に関するものである。
従来、内装導電膜は、金属酸化物、黒鉛および
珪酸塩を主成分とした導電塗料を用いて形成され
ていたが、導電塗料中の黒鉛と金属酸化物との比
重差により、分散質の分散安定性が悪く、抵抗値
の均一な塗膜を形成することが困難であつた。し
たがつて、強固な塗膜でかつ適度な導電性を有
し、さらにガス吸着特性に優れた内装導電膜が得
られなかつた。
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
導電塗料中の分散質の重量比および粒径を規定す
ることによつて、塗料の分散安定性を向上させ、
抵抗値のほぼ均一な塗膜を形成させてスパーク発
生時のピーク電流を低減させ、カソード及び電子
銃回路の損傷を防止したカラーブラウン管を提供
することにある。
このような目的を達成するために本発明は、内
装導電膜が金属酸化物、黒鉛、二酸化珪素および
珪酸塩からなり、その重量比が金属酸化物10部に
対して黒鉛が0.5〜50部、二酸化珪素が0.5〜４
部、珪酸塩が５〜60部とするとともに、その粒径
を金属酸化物が0.05〜3μｍ，黒鉛が0.1〜10μｍ，
二酸化珪素が0.005〜0.05μｍとしたものである。
以下実施例により本発明のカラーブラウン管を詳
細に説明する。
第１図は本発明によるカラーブラウン管の一実
施例を示す要部断面図である。同図において、１
はパネル部、２はフアンネル部、２ａはフアンネ
ルコーン部、２ｂはフアンネルネツク部、３はパ
ネル部１の内面側に配置されたシヤドウマスク、
４はフアンネルコーン部２ａの内壁面に被着形成
された低抵抗内装導電膜、５はフアンネルコーン
部２ｂの内壁面に被着形成された本発明による高
抵抗内装導電膜、６はフアンネルネツク部２ｂの
内壁面に被着形成された低抵抗内装導電膜、７は
コーン部２ａの低抵抗内装導電膜４に外部から高
電圧を供給するアノードボタン、８は電子銃講
体、９はネツク部２ｂ内の低抵抗内装導電膜６に
その接触片を当接させて電子銃講体８の一部を構
成するとともに高電圧を受給するバルブスペーサ
コンタクト、１０は電子銃講体８先端部に設けら
れたゲツター、１１は電子銃講体８方向へのゲツ
ター１０の飛散を遮蔽するゲツターシールドであ
る。
具体例 １
The present invention relates to a color cathode ray tube, and particularly to a high-resistance internal conductive film formed on the inner wall surface of a funnel portion. Normally, an internal conductive film containing graphite as a main component is adhered to the inner wall surface of the funnel portion of a color cathode ray tube, and a high voltage is applied from the outside to this internal conductive film through a high voltage terminal. Functions as a conductor to supply high voltage to the electron gun enclosed in the shadow mask, fluorescent surface and funnel neck, functions to form a capacitor with the exterior conductive film coated on the outer wall of the funnel, and graphite gas adsorption. It has various functions such as getter function depending on its characteristics. On the other hand, this internal conductive film is formed on the inner wall surface of the funnel portion of the bulb by the following method. That is, the inner wall surface of the funnel part of the bulb constituting the color cathode ray tube is cleaned using a cleaning agent such as a hydrogen fluoride aqueous solution, dried, and then a conductive paint containing a binder such as potassium silicate, sodium silicate, or lithium silicate is applied. After applying by spraying, brushing, or flow coating, apply an additional 400 to 450
Generally, the internal conductive film is formed by performing heat treatment at .degree. Conventionally, when a spark occurs in an electron gun during operation of a color cathode ray tube, a large current flows from the capacitor formed between the inner conductive film and the outer conductive film, damaging the cathode or damaging the electron gun circuit.
It is known to destroy ICs, transistors, etc. On the other hand, a method of protecting the circuit side using a spark gap, an internal conductive film,
A protection method has been put into practical use by making a part of the spark path, such as a mount, a high-resistance material. The present invention particularly relates to the latter, and relates to an improvement of an internal conductive film having a high resistance value. Conventionally, interior conductive films have been formed using conductive paints containing metal oxides, graphite, and silicates as main components, but due to the difference in specific gravity between graphite and metal oxides in the conductive paints, dispersion of dispersoids has been reduced. The stability was poor, and it was difficult to form a coating film with a uniform resistance value. Therefore, it has not been possible to obtain an interior conductive film that is a strong coating film, has appropriate conductivity, and has excellent gas adsorption properties. Therefore, the present invention has been made by focusing on the above-mentioned conventional drawbacks, and its purpose is to improve the dispersion of the paint by regulating the weight ratio and particle size of the dispersoid in the conductive paint. improve stability,
It is an object of the present invention to provide a color cathode ray tube in which a coating film having a substantially uniform resistance value is formed to reduce the peak current when a spark is generated, thereby preventing damage to a cathode and an electron gun circuit. In order to achieve such an object, the present invention provides that the internal conductive film is made of metal oxide, graphite, silicon dioxide, and silicate, and the weight ratio is 0.5 to 50 parts of graphite to 10 parts of metal oxide. Silicon dioxide is 0.5-4
part, silicate is 5 to 60 parts, and the particle size is 0.05 to 3 μm for metal oxide, 0.1 to 10 μm for graphite,
Silicon dioxide has a thickness of 0.005 to 0.05 μm.
The color cathode ray tube of the present invention will be explained in detail below with reference to Examples. FIG. 1 is a sectional view of essential parts showing an embodiment of a color cathode ray tube according to the present invention. In the same figure, 1
2 is a panel portion, 2 is a funnel portion, 2a is a funnel cone portion, 2b is a funnel neck portion, 3 is a shadow mask disposed on the inner surface side of the panel portion 1,
4 is a low-resistance internal conductive film formed on the inner wall surface of the funnel cone portion 2a, 5 is a high-resistance internal conductive film according to the present invention formed on the inner wall surface of the funnel cone portion 2b, and 6 is a funnel net. 7 is an anode button that supplies a high voltage from the outside to the low-resistance internal conductive film 4 of the cone portion 2a; 8 is an electron gun body; 9 is a network A valve spacer contact 10 is placed at the tip of the electron gun body 8 and constitutes a part of the electron gun body 8 by bringing its contact piece into contact with the low resistance internal conductive film 6 in the part 2b and receives high voltage. The provided getter 11 is a getter shield for shielding the getter 10 from scattering in the direction of the electron gun body 8. Specific example 1
【表】
まず、上記表１に示す材料、重量比および粒径
から組成される導電塗料を生成し、この導電塗料
を第１図に示した20型90°偏向のカラーブラウン
管フアンネルコーン２ａの内壁面でフアンネルネ
ツク部２ｂ近傍に約10μｍ程度の厚さで塗布して
約2Ω・cm以上の比抵抗を有する高抵抗導電膜５
を形成した。
このような構成によれば、真空中におけるアノ
ードボタン７と電子銃講体８のバルブスペーサコ
ンタクト９間に５〜17KΩの高抵抗値が得られ、
従来の導電塗料を用いた場合４〜数100MΩの抵
抗値変動（バラツキ）に対して大幅に安定化する
ことができた。
具体例 ２[Table] First, a conductive paint composed of the materials, weight ratios, and particle sizes shown in Table 1 above is produced, and this conductive paint is applied to the funnel cone 2a of a 20-inch 90° deflection color cathode ray tube shown in Figure 1. A high-resistance conductive film 5 having a specific resistance of about 2 Ω·cm or more is applied to the inner wall surface near the funnel neck portion 2b to a thickness of about 10 μm.
was formed. According to such a configuration, a high resistance value of 5 to 17 KΩ can be obtained between the anode button 7 and the valve spacer contact 9 of the electron gun body 8 in a vacuum,
When conventional conductive paint was used, it was possible to significantly stabilize resistance value fluctuations (variations) of 4 to several 100 MΩ. Specific example 2
【表】
次に、上記表２の示す材料、重量比および粒径
から組成される導電塗料を第１図に示したフアン
ネルコーン２ａ内壁面のフアンネルネツク部２ｂ
近傍に約10μｍ程度の膜厚で塗布して約2Ω・cm以
上の比抵抗を有する高抵抗導電膜５を形成した。
このような構成によればアノードボタン７とバ
ルブスペーサコンタクト９間が6.6〜19KΩと変動
幅の少ない安定化した高抵抗値が得られた。
このようにして構成された内装導電膜は、約
2Ω・cm以上の比抵抗値を得るには、重量比で金
属酸化物10部に対し黒鉛0.5部未満では比抵抗値
の変動（バラツキ）が大きく、逆に50部以上では
比抵抗値が0.2Ω・cm以下になり効果がない。ま
た、二酸化珪素は重量比で0.5部未満では黒鉛、
金属酸化物との結合が弱くなり、分散安定性に欠
けてくる。逆に４部以上ではその効果は変らなく
ガス吸収性が劣化する。珪酸塩は重量比５部未満
では塗膜強度がもろくなりすぎ、逆に60部以上で
は、珪酸塩が塗膜表面に緻密な膜を形成するた
め、熱処理工程でふくれて剥れ落ちるかまたはガ
ス吸収性が劣化するなどの不都合がある。さらに
粒径については、黒鉛が0.1μｍ未満では比抵抗値
を調整するために、酸化チタン10部に対する黒鉛
の重量比が0.5部以下になり、塗料製造上、一定
の比抵抗値を得るのが難しくなるので好ましくな
い。逆に10μｍ以上では内装導電膜の塗膜厚が約
10μｍ前後であること、とくに、刷毛などによる
塗布の際、塗膜厚のバラツキが±30％を越えるこ
とから不適当である。また、本発明の導電塗料は
金属酸化物粒子、黒鉛粒子、二酸化珪素微粒子を
水中に一度分散させた後に瞬間乾燥させて乾燥粉
末を形成し、その後更に水中にバインダである珪
酸塩を含ませて上記乾燥粉末を再分散させて塗料
としているので分散質に偏りがなくより安定な塗
料となり、内装導電膜となつた時の安定性が向上
することを利用している。したがつて、金属酸化
物、二酸化珪素の粒径は前処理として形成する黒
鉛、金属酸化物、二酸化珪素からなる乾燥粉末を
得るのに好適な範囲を示してある。金属酸化物と
しては、従来より実用化されている酸化第２鉄
（Fe2O3），酸化チタン（TiO2）の他に酸化アルミ
ニウム（Al2O3），酸化ニツケル（NiO2）等を用
いても同様の効果が得られる。また、珪酸塩とし
てはナトリウム塩、カリウム塩が用いられている
が、リチウム塩等またはこれらの混合物を用いる
ことができる。
したがつて、本発明の導電塗料によれば、第２
図に示したように内装導電膜の比抵抗を2Ω・cm
以上とすることによつて、スパーク発生時にはそ
の電流のピーク値を100A以下に抑えることがで
き、したがつてカソード又は電子銃回路の損傷を
防止することができた。また、第３図に示したよ
うに黒鉛と酸化チタンとの配合比を拡大させるこ
とによつて、ガス特性を大幅に向上させることが
できる結果が得られた。
以上説明したように本発明によれば、黒鉛と金
属酸化物が均一に分散した高抵抗導電膜が得られ
るので、ほぼ均一な抵抗値、強固な塗膜、適度な
導電性が得られ、さらにガス吸着特性も向上で
き、品質および信頼性の高いカラーブラウン管が
得られる極めて優れた効果を有する。[Table] Next, a conductive paint composed of the materials, weight ratios, and particle sizes shown in Table 2 above was applied to the funnel neck portion 2b of the inner wall surface of the funnel cone 2a shown in FIG.
A high-resistance conductive film 5 having a specific resistance of about 2 Ω·cm or more was formed by applying the film to a thickness of about 10 μm nearby. With this configuration, a stable high resistance value of 6.6 to 19 KΩ between the anode button 7 and the valve spacer contact 9 with a small fluctuation range was obtained. The interior conductive film constructed in this way is approximately
In order to obtain a resistivity value of 2Ω・cm or more, if the weight ratio is less than 0.5 parts of graphite to 10 parts of metal oxide, the fluctuations in the resistivity value will be large, and conversely, if the weight ratio is 50 parts or more, the resistivity value will be 0.2 parts. It becomes less than Ω・cm and has no effect. In addition, if silicon dioxide is less than 0.5 part by weight, graphite,
The bond with the metal oxide becomes weaker, resulting in a lack of dispersion stability. On the other hand, if the amount is 4 parts or more, the effect remains the same and the gas absorbency deteriorates. If the weight ratio of silicate is less than 5 parts, the strength of the coating becomes too brittle, while if it exceeds 60 parts, the silicate will form a dense film on the coating surface, which may swell and peel off during the heat treatment process, or cause gas. There are disadvantages such as deterioration of absorbency. Furthermore, regarding the particle size, if the graphite is less than 0.1 μm, the weight ratio of graphite to 10 parts of titanium oxide will be 0.5 parts or less in order to adjust the resistivity value, and it is difficult to obtain a constant resistivity value in paint manufacturing. I don't like this because it becomes difficult. On the other hand, if the thickness is 10 μm or more, the thickness of the internal conductive film will be approximately
It is inappropriate that the thickness is around 10 μm, especially since the variation in coating film thickness exceeds ±30% when applied with a brush or the like. Furthermore, the conductive paint of the present invention is prepared by dispersing metal oxide particles, graphite particles, and silicon dioxide fine particles in water and then instantly drying them to form a dry powder, and then further impregnating the water with a silicate as a binder. Since the above-mentioned dry powder is redispersed to form a coating material, the dispersoid is not biased, resulting in a more stable coating material, and the stability of the coating material when used as an internal conductive film is improved. Therefore, the particle sizes of the metal oxide and silicon dioxide are shown in a range suitable for obtaining a dry powder consisting of graphite, metal oxide, and silicon dioxide formed as a pretreatment. Examples of metal oxides include ferric oxide (Fe 2 O 3 ) and titanium oxide (TiO 2 ), which have been put into practical use, as well as aluminum oxide (Al 2 O 3 ) and nickel oxide (NiO 2 ). Similar effects can be obtained by using Furthermore, although sodium salts and potassium salts are used as silicates, lithium salts, etc. or mixtures thereof can also be used. Therefore, according to the conductive paint of the present invention, the second
As shown in the figure, the specific resistance of the internal conductive film is 2Ω・cm.
By doing so, when a spark occurs, the peak value of the current can be suppressed to 100 A or less, and therefore damage to the cathode or the electron gun circuit can be prevented. Moreover, as shown in FIG. 3, by increasing the blending ratio of graphite and titanium oxide, results were obtained in which the gas properties could be significantly improved. As explained above, according to the present invention, a high-resistance conductive film in which graphite and metal oxides are uniformly dispersed can be obtained, so that a nearly uniform resistance value, a strong coating film, and appropriate conductivity can be obtained. The gas adsorption properties can also be improved, and this has an extremely excellent effect in that a color cathode ray tube of high quality and reliability can be obtained.
第１図は本発明によるカラーブラウン管の一例
を示す要部断面図、第２図、第３図は本発明によ
るカラーブラウン管を説明するための特性図であ
る。
１……パネル部、２……フアンネル部、２ａ…
…フアンネルコーン部、２ｂ……フアンネルネツ
ク部、３……パネル部、４……コーン部内装導電
膜、５……高抵抗導電膜、６……ネツク部内装導
電膜、７……アノードボタン、８……電子銃講
体、９……バルブスペーサコンタクト、１０……
ゲツター、１１……ゲツターシールド、１２……
高抵抗導電膜。
FIG. 1 is a sectional view of a main part showing an example of a color cathode ray tube according to the invention, and FIGS. 2 and 3 are characteristic diagrams for explaining the color cathode ray tube according to the invention. 1...Panel part, 2...Funnel part, 2a...
...Funnel cone part, 2b...Funnel neck part, 3...Panel part, 4...Conductive film inside the cone part, 5...High resistance conductive film, 6...Conductive film inside the neck part, 7...Anode button, 8...Electron gun course, 9...Valve spacer contact, 10...
Getter, 11...Getter Shield, 12...
High resistance conductive film.
Claims (1)
導電膜を備えたカラーブラウン管において、前記
導電膜は重量比で金属酸化物10部に対して黒鉛が
0.5〜50部、二酸化珪素が0.5〜４部、珪酸塩が５
〜60部からなり、かつ前記金属酸化物、黒鉛、二
酸化珪素の粒径をそれぞれ0.05〜3μｍ，0.1〜10μ
ｍ，0.005〜0.05μｍとしたことを特徴とするカラ
ーブラウン管。1. In a color cathode ray tube equipped with a high-resistance conductive film deposited on the inner wall surface of the funnel, the conductive film has a weight ratio of graphite to 10 parts of metal oxide.
0.5-50 parts, silicon dioxide 0.5-4 parts, silicate 5 parts
~60 parts, and the particle sizes of the metal oxide, graphite, and silicon dioxide are 0.05~3μm and 0.1~10μm, respectively.
A color cathode ray tube characterized by having a diameter of 0.005 to 0.05 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12598580A JPS5750753A (en) | 1980-09-12 | 1980-09-12 | Color picture tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12598580A JPS5750753A (en) | 1980-09-12 | 1980-09-12 | Color picture tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5750753A JPS5750753A (en) | 1982-03-25 |
| JPH0359542B2 true JPH0359542B2 (en) | 1991-09-10 |
Family
ID=14923869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12598580A Granted JPS5750753A (en) | 1980-09-12 | 1980-09-12 | Color picture tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5750753A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL8300914A (en) * | 1983-03-14 | 1984-10-01 | Philips Nv | ELECTRIC DISCHARGE TUBE AND METHOD FOR MANUFACTURING AN ELECTRICALLY CONDUCTIVE LAYER ON A WALL PART OF THE COATING OF SUCH A TUBE. |
| JPS6132944A (en) * | 1984-07-26 | 1986-02-15 | Toshiba Corp | Cathode-ray tube |
| JP2515278B2 (en) * | 1985-03-18 | 1996-07-10 | 株式会社東芝 | Electron tube |
| JPS6379794A (en) * | 1986-07-10 | 1988-04-09 | テキサス インスツルメンツ インコ−ポレイテツド | Material treatment furnace and method of forming single crystal silicon sphere |
| JPH02214784A (en) * | 1989-02-15 | 1990-08-27 | Nippon Achison Kk | Interior finish coating material composition for cathode ray tube |
| KR970008296A (en) * | 1995-07-28 | 1997-02-24 | 구자홍 | Cathode ray tube conductive coating liquid |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238713A (en) * | 1975-09-19 | 1977-03-25 | Shingijutsu Kaihatsu Kk | Supporting device for withdrawing anchor |
| JPS5252362A (en) * | 1975-09-22 | 1977-04-27 | Rca Corp | Crt |
| JPS539400A (en) * | 1976-07-14 | 1978-01-27 | Japan Tobacco Inc | Method for increasing packing capacity of tobacco |
| JPS5641655A (en) * | 1979-09-14 | 1981-04-18 | Hitachi Powdered Metals Co Ltd | Preparation of coating for cathode ray tube |
| JPS5832735A (en) * | 1981-08-19 | 1983-02-25 | オリンパス光学工業株式会社 | Length measuring apparatus for endoscope |
| JPS6252422A (en) * | 1985-09-02 | 1987-03-07 | Toho Rayon Co Ltd | Sleeve for measuring temperature of high temperature treatment furnace and it use |
-
1980
- 1980-09-12 JP JP12598580A patent/JPS5750753A/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5238713A (en) * | 1975-09-19 | 1977-03-25 | Shingijutsu Kaihatsu Kk | Supporting device for withdrawing anchor |
| JPS5252362A (en) * | 1975-09-22 | 1977-04-27 | Rca Corp | Crt |
| JPS539400A (en) * | 1976-07-14 | 1978-01-27 | Japan Tobacco Inc | Method for increasing packing capacity of tobacco |
| JPS5641655A (en) * | 1979-09-14 | 1981-04-18 | Hitachi Powdered Metals Co Ltd | Preparation of coating for cathode ray tube |
| JPS5832735A (en) * | 1981-08-19 | 1983-02-25 | オリンパス光学工業株式会社 | Length measuring apparatus for endoscope |
| JPS6252422A (en) * | 1985-09-02 | 1987-03-07 | Toho Rayon Co Ltd | Sleeve for measuring temperature of high temperature treatment furnace and it use |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5750753A (en) | 1982-03-25 |
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