KR830001014B1 - Color water pipe - Google Patents

Abstract

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Description

Color water pipe

1 is a sectional view showing the main parts of an example of a conventional color water pipe.

2 is a waveform diagram of current flowing in a spark.

3 is a sectional view showing the main portion of an embodiment of the color receiver according to the present invention.

4 and 5 are main cross-sectional views illustrating the adhesion state of the conductive film according to the present invention.

6 is a sectional view showing the main parts of another embodiment of the color water pipe according to the present invention;

The present invention relates to a structure of a conductive coating deposited on the inner wall surface of a color water pipe, particularly a neck tube.

In general, as a means for supplying a high voltage to the anode of the electron gun body housed in the vacuum outer protective case of the color receiver, a conductive film is formed on the inner wall surface of the vacuum outer protective case and attached to the tip of the electron barrel. It is made by contact with the valve spacer made of metal. In addition, the material of the conductive film is tough to withstand high temperature and vacuum, has low production cost, good workability at the time of coating, good conductivity, low gas release, excellent adhesion, and durability against wear. There is a restriction.

For this reason, the conductive material which can be used is limited, and in the development, the mixture of the conductive material mainly made of graphite and water grass is the mainstream.

1 is a sectional view showing the main parts of an example of a conventional color water pipe.

In the figure, reference numeral 1 denotes a vacuum outer protective case made of a magnetic material, 1a is a panel portion, 1b is a funnel portion, 1c is a neck tube, and 2 is an inner wall surface of the panel portion 1a. The shadow mask disposed opposite to the deposited fluorescent surface 3, (4) is a funnel portion 1b of the vacuum outer protective case (1), a conductive film deposited on the inner wall surface of the neck tube (1c), (5) is a conductive film A positive electrode button for supplying a high voltage from the outside to the film 4, 6 is an electron muzzle body, 7 is installed at the distal end of the electron gun body 7, and a contact portion is formed on the conductive film 4; ) Is a valve spacer for supplying and receiving the high voltage supplied to the electroconductive film 4.

When the high voltage is applied to the positive electrode button 5 in the external high voltage generating circuit, the high voltage is formed on the positive electrode of the electron gun body 6 via the conductive film 4 and the valve spacer 7. Supplied.

In this case, the current flowing into the electron barrel 6 is extremely small. However, in the color water pipe according to the above configuration, sparks are generated in the electron gun body 6 during the knocking step in manufacturing the water pipe and when the television set is mounted, so that the conductive film 4 and the valve spacer 7 are formed. The current of the waveform as shown in FIG. 2 flows through it, and the instantaneous maximum current at this time reaches about 1000A. However, the contact resistance between the conductive film 4 and the valve spacer 7 is several tens of digits.

Therefore, the energy consumed at the contact portion between the conductive film 4 and the valve spacer 7 at the time of spike reaches 10 ⁷ joules at the moment, and by the generation of this joule heat, the energy of the conductive film 4 with the valve spacer 7 of the conductive film 4 is increased. The contact was scattering.

In addition, since the potential difference between the electrodes forming the main lens of the electron gun body 6 is greater than about 20 KV and the distance between the electrodes is about 1 mm when the Teller Vision set is mounted, some of the conductive material dust in the tube Was attached and spikes occurred, which significantly reduced the reliability of the water pipe.

Therefore, in the conductive film 4, the contact portion with the valve spacer 5 should not scatter even if sparks in the tube of the water pipe are generated.

Further, in manufacturing the water tube, when the electron muzzle body 6 is inserted into the neck tube 1c, the valve spacer 7 wraps a part of the conductive film 4. However, in the conventional conductive film 4, powdered graphite is used as the main conductive material and water grass is used as the binding line.

Since the conductive film 4 is a soft object, when the surface is wrapped, it is easy to wear.

And it was technically extremely difficult to suppress this abrasion at the same time, and it was a factor which generate | occur | produces the dust in a water pipe and produces the said spark.

Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks and to provide a highly reliable color receiving tube.

In order to achieve the above object, the present invention provides a film made of a mixture of graphite or other conductive material and molar grass on the inner wall surface in contact with the valve spacer of the tube, and a conductive material on the upper surface or the glass surface directly. And a film formed of a mixture of fritchoza. Hereinafter, the color receiver according to the present invention will be described in detail with reference to the drawings.

First, before describing an Example, in order to make understanding of this invention easy, a conductive film is demonstrated.

That is, as a material of the conductive film formed on the inner wall surface of the neck tube, there is a conductive powder frit element.

On the other hand, the vacuum outer protective case of the color water pipe is made of lead glass. For this reason, the temperature which bakes a conductive frit element is about 450 degreeC in the highest value.

Therefore, the conductive material mixed in the frit choja is limited. Usually, at such firing temperature, it is best to use silver powder alone or as a main body.

In addition, since the said fritcho is powder, it mixes with the binding line which becomes an organic substance with moderate viscosity and adhesiveness at the time of deposition, and uses it as a paste form.

In this case, as this binding line, a nitrocellulose-based substance is most commonly used, and usually diluted with an organic solvent. In addition, the use of the conductive material on the inner wall surface of the color water pipe is based on the following reasons. In other words,

(1) The inner wall surface of the outer protective case is to have a uniform potential.

(2) Supply weak pole voltage to electron gun sphere in high voltage power supply.

(3) A conductive film is also formed on the outer side of the outer protective case, and a capacitor is formed from the inner and outer conductive films to form a ripple filter for a high voltage circuit.

(4) Physically absorb inert gas remaining in the pipe. It is for such a reason.

Since dual (4) has no suitable substance other than graphite, it is within the range which does not affect subparagraph (4) because it is substituted with another substance.

Therefore, in the present invention, only the conductive film in contact with the spacer on the inner wall surface of the pipe is replaced with the conductive frit chor.

As a result of actually applying the ideal phase fritza, the followings were found. In other words, when the mixture of graphite and water grass is applied to the surface on which even the conductive frit is applied, the graphite film is thrown off and a good conductive film is not formed as it is.

This is because the fritchoza uses a nitrocellulose-based binding wire as described above, and this substance is hydrophobic. Usually, as a countermeasure, such a graphite film is formed after baking a frit element once.

However, since the color water pipe has a large volume and heat capacity, and is made of super magnetic material, a significant increase in price cannot be neglected by using a dedicated firing furnace. Therefore, as a countermeasure, the frit film may be formed after the graphite film is coated in advance and dried completely.

3 is a cross-sectional view of main parts showing an embodiment of the color receiver according to the present invention, and the same symbols as those of FIG. In the same figure, the conductive frit coating film 8 made of a mixture of silver powder and a frit choza as a conductive material is formed on the upper surface of the conductive coating film 4 deposited on the inner wall surface of the transfer pipe 1c.

In this case, the conductive frit coating film 8 mixes the silver powder in a ratio of 5-98% by weight to the frit choja, and applies a mixed solution to which hydrophilic polyvinyl alcohol is added as a binding line, and the thickness after baking Is deposited in the range of 0.05-500 µm.

In this case, the contact resistance between the conductive frit film 8 and the valve spacer 7 is formed to be approximately 0 ohms.

In such a configuration, in practice, since the conventional water grass is hygroscopic, it may be difficult to apply the conductive frit to the surface while completely removing moisture on the surface of the conductive film 4, and the firing temperature. Due to the constraints from the above, the flowability of the frit choker cannot be increased during firing. Therefore, under such conditions, as shown in FIG. 4, the fusion of the conductive frit coating film 8 with the conductive coating 4 of graphite and water grass is difficult. It's not satisfactory enough.

Therefore, in the present invention, by using a hydrophilic substance of a higher alcohol such as polyvinyl alcohol as the binding line of the conductive frit chondrography, for example, as shown in FIG. 8) penetrates into the conductive film 4, which is a mixed film of graphite and water grass, so that the two types of films are integrated, and are electrically good, mechanically strong, and more self-adhesive.

Therefore, wear of the conductive frit coating film 8 caused by the contact of the valve spacer 7 is eliminated, and the generation of dust is also eliminated, and the generation of sparks can be prevented.

6 is a sectional view showing the main parts of another embodiment of the color water pipe according to the present invention, and the same symbols as those in FIG.

In the figure, the conductive frit coating film 8 formed by mixing a conductive line such as silver and a binding line made of a hydrophilic polyvinyl alcohol with a conductive material such as silver on the inner wall surface of the tubular tube 1c in contact with the valve spacer 7 is formed. It is formed to be deposited at a thickness in the range of 0.05-500 µm.

The front end axis of the conductive frit coating film 8 is superposed on the end of the conductive coating film 4 connected to the cover pipe 1c and bonded in the same structure as the above embodiment.

In this case as well, silver as the conductive material is contained in the range of 5-98% by weight, and the contact resistance between the doser frit film 8 and the valve spacer 7 is formed to be approximately 0 ohms.

Also in such a structure, since the conductive frit film 8 is firmly adhered to the inner wall surface of the neck tube 1c and the end of the conductive film 4, the strength against the contact of the valve spacer 7 is improved, and The same effect is obtained. As described above, according to the present invention, by installing a conductive frit coating on the inner wall surface of the bare tube in contact with the valve spacer of the electron muzzle, the strength against wear caused by the contact of the valve spacer is greatly improved, and dust is generated. This disappears.

In addition, it is possible to reliably prevent the occurrence of sparks occurring between the contact portions, and to significantly improve the quality and reliability of the color water pipes, such as elimination of conduction defects due to scattering of the contact portions, thereby achieving an extremely excellent effect.

Claims (1)

In a color water pipe in which a valve spacer of an electron muzzle body housed in the conduit is placed in contact with a conductive film formed on the inner wall surface of a neck tube, a conductive material using silver alone or as a main component in a portion where the valve spacer of the conductive film contacts A color water pipe characterized in that a conductive frit coating film made of a mixture of frit choza using water-soluble substances in the binding ratio in the range of 5-98% by weight is laid in the range of 0.05-500 μm after firing. .

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