KR20000010506U - Cathode ray tube - Google Patents

Abstract

A cathode ray tube is disclosed. According to the present invention, a panel in which a phosphor is coated on an inner surface and a conductive film is formed on an outer surface, a funnel extending from the panel and having a neck portion, an explosion-proof band installed at a junction of the panel and the funnel, an electron gun inserted into the neck portion And a deflection yoke installed at an outer side of the neck portion and having a vertical deflection coil and a horizontal deflection coil wound thereon, and a conductive connection film formed by applying and drying a conductive coating solution to electrically connect the conductive film on the outer surface of the panel and the explosion-proof band. Provided is a cathode ray tube. Since the cathode ray tube according to the present invention is electrically connected to each other by a conductive connecting film dried by applying a conductive coating solution to the conductive film and the explosion-proof band on the panel surface, a cathode ray tube having reduced manufacturing cost and excellent workability may be provided. .

Description

Cathode ray tube

The present invention relates to a cathode ray tube, and more particularly, to a cathode ray tube in which a conductive film on the surface of the cathode ray tube and an explosion-proof band are connected to a conductive film for connection by applying a high concentration of conductive coating solution and drying.

In general, a cathode ray tube includes a panel coated with a phosphor on an inner surface, a funnel extending from the panel and having a neck portion, an electron gun inserted into the neck portion, and a deflection yoke installed outside the neck portion and having a horizontal coil and a vertical coil. It is provided. The electron beam generated from the electron gun is irradiated to the phosphor surface of the panel to cause the phosphor to emit light, and the path of the electron beam is changed as the voltage applied to the horizontal coil and the vertical coil of the deflection yoke changes and the electrons on the inner surface of the panel. The scanning of the beam becomes possible.

1 is a schematic perspective view of a typical cathode ray tube.

Referring to the drawings, the panel 11 coated with the phosphor on the inner side is joined to the conical funnel 12, and the explosion-proof band 17 is surrounded along the junction of the panel 11 and the funnel 12. . A neck 13 is formed at the rear of the funnel 12, and an electron gun is inserted inside the neck 13. In the figure, the pin 16 of the electron gun is shown. Moreover, although the deflection yoke 14 is provided in the outer peripheral surface of the neck 13, the vertical deflection coil 15 is wound by the separator outer surface of the deflection yoke 14. As shown in FIG.

In the operation of the cathode ray tube as described above, the electric field formed by the vertical coil and the horizontal coil wound on the deflection yoke 14 changes the path of the electron beam generated from the electron gun. On the other hand, electromagnetic waves generated from the coil wound on the deflection yoke 14 may have a detrimental effect on the human body, and static electricity may be generated on the surface of the panel due to negative electric charges accumulated inside.

In order to prevent such electromagnetic waves and static electricity, a conductive film is formed on the panel surface of the cathode ray tube. For example, in FIG. 1, an ITO material, which is a conductor, is applied over the entire surface of the panel 11 to form a conductive film. This uses the property that electromagnetic waves flow to a place with good conductivity. That is, in order to minimize the effect of electromagnetic waves generated from the deflection yoke 14 on the person facing the panel 11, a conductive ITO film is applied to the surface of the panel 11 and grounded to block the electromagnetic waves. It is to prevent the generation of static electricity. A conductive tape 18 is attached between the conductive film on the surface of the panel 11 and the explosion-proof band 17 so that the electrostatic charge formed on the conductive film can flow into the explosion-proof pad 17. In the example shown in the figure, four conductive tapes 18 are provided, one at the center of each side of the hexagonal panel.

Using the conductive tape 18 as described above, the method of flowing the static charge on the surface of the panel to the explosion-proof band has the disadvantage of requiring an additional material. In other words, the use of the conductive tape 18 not only increases the manufacturing cost, but also has the problem of requiring additional labor in application.

The present invention has been made to solve the above problems, an object of the present invention is to provide a cathode ray tube having a conductive connecting film that can electrically connect the conductive film formed on the panel surface and the explosion-proof band.

1 is a schematic external perspective view of a typical cathode ray tube.

2 is a schematic external perspective view of a cathode ray tube according to the present invention.

<Brief Description of Major Codes in Drawings>

11.Panel 12. Funnel

13. Neck 14. Deflection yoke

15. Vertical deflection coil 16. Electron gun

17. Explosion proof band 38. Exterior graphite part

18. Conductive tape 28. Conductive connecting film

In order to achieve the above object, according to the present invention, a panel in which a phosphor is coated on an inner surface and a conductive film is formed on an outer surface, a funnel extending from the panel and having a neck portion, an explosion-proof band installed at a junction of the panel and the funnel, Electron gun inserted inside the neck portion, a deflection yoke installed on the outside of the neck portion and wound with a vertical deflection coil and a horizontal deflection coil, and a conductive coating solution is applied to electrically connect the conductive film on the outer surface of the panel and the explosion-proof band. And a cathode ray tube having a conductive connecting film formed by drying.

According to one feature of the present invention, the conductive connecting film is formed by applying a conductive coating liquid between the conductive film on the outer surface of the panel and the explosion-proof band using a brush and then drying.

According to another feature of the present invention, the conductive connecting film is formed by locally spraying the conductive coating liquid between the conductive film on the outer surface of the panel and the explosion-proof band using a nozzle.

Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the accompanying drawings.

2 is a schematic perspective view of a cathode ray tube according to the present invention.

Referring to the drawings, the overall structure is similar to that of the conventional cathode ray tube shown in FIG. In other words, the panel 11 coated with the phosphor on the inner side is joined to the conical funnel 12, and the explosion-proof band 17 is surrounded along the junction of the panel 11 and the funnel 12. A neck 13 is formed at the rear of the funnel 12, and an electron gun is inserted inside the neck 13. In the figure, the pin 16 of the electron gun is shown. Moreover, although the deflection yoke 14 is provided in the outer peripheral surface of the neck 13, the vertical deflection coil 15 is wound by the separator outer surface of the deflection yoke 14. As shown in FIG. On the outer surface of the panel 11, a conductive coating film is formed over the entire surface. The conductive coating film is preferably an ITO film as mentioned above.

According to a feature of the present invention, the conductive coating is applied to electrically connect the outer surface of the panel 11 and the explosion-proof band 17. In FIG. 2, indicated by reference numeral 28 is a conductive connecting film coated with a conductive coating solution and dried. The conductive connecting film is formed by the operator or by the automated equipment by applying the conductive coating liquid with a brush or by spraying locally using a nozzle, and drying until the fluidity of the coating liquid is removed. In the figure, although the connection film 18 is formed in the center part of each side of a square panel, the formation position and area are not restrict | limited. For example, even if the conductive connecting film 18 is formed over the entire main surface of the quadrangular panel 11 or the conductive connecting film 18 is formed on only one side, the desired effect can be obtained.

Since the cathode ray tube according to the present invention is electrically connected to each other by a conductive connecting film dried by applying a conductive coating solution to the conductive film and the explosion-proof band on the panel surface, a cathode ray tube having reduced manufacturing cost and excellent workability may be provided. .

Although the present invention has been described with reference to one embodiment shown in the drawings, those skilled in the art will understand that various modifications and equivalent other embodiments are possible. Therefore, the true scope of protection of the present invention should be limited only by the attached claims.

Claims (3)

A panel having a phosphor coated on an inner surface thereof and a conductive film formed on an outer surface thereof; A funnel extending from the panel and having a neck portion, Explosion-proof band installed in the junction of the panel and the funnel, An electron gun inserted into the neck portion; A deflection yoke installed at an outer side of the neck part and wound with a vertical deflection coil and a horizontal deflection coil; And a conductive connection film formed by applying and drying a conductive coating solution to electrically connect the conductive film on the outer surface of the panel with the explosion-proof band. The cathode ray tube according to claim 1, wherein the conductive connection film is formed by applying a conductive coating solution between the conductive film on the outer surface of the panel and the explosion-proof band using a brush. The cathode ray tube according to claim 1, wherein the conductive connecting film is formed by locally spraying a conductive coating solution between the conductive film on the outer surface of the panel and the explosion-proof band by using a nozzle.