JP2002056790A - Cathode-ray tube display equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain cathode-ray tube display equipment which can absorb efficiently interference electromagnetic wave from a MHz band to a GHz band, and does not disturb luminescence characteristics of the cathode-ray tube and, further, which is excellent in mass-production. SOLUTION: The cathode-ray tube display equipment is constituted with, as its main composition components, a cathode-ray tube 1 in which a magnetic loss material layer 3 is formed in an inner side face or outer side face of a flat plane section 2 for the display, and a phosphor 4 is formed with a predetermined pattern in inner side of the flat plane section for a display, and a deflecting yoke 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cathode ray tube display device mainly used for a television receiver or a personal computer monitor, and more particularly to a cathode ray tube display device taking measures against noise absorption. .

[0002]

2. Description of the Related Art A conventional cathode ray tube display device (hereinafter abbreviated as CRT device) is shown in FIG. In FIG. 5, the CRT device includes a deflection yoke 61, a shadow mask 51, and a cathode ray tube 11 including a phosphor 41 and the like. Here, a phosphor 41 is formed in a predetermined pattern on the inner surface of the display flat portion 21 of the cathode ray tube 11. Electron beam 91 emitted from electron gun 71
Passes through the hollow hole of the shadow mask 51, and the phosphor 4
In one, the phosphor 41 emits light.

[0003]

In the conventional CRT apparatus, the electron beam 91 hits the phosphor 41, and the phosphor 41
When light is emitted, an interfering electromagnetic wave is generated. FIG. 6 is a diagram showing an example of measures against noise in a conventional cathode ray tube display device. For a conventional CRT device, a measure for suppressing the above-mentioned disturbing electromagnetic waves is to connect the conductive mesh 81 to the cathode ray tube 1.
Measures such as embedding the display flat portion 21 inside the glass have been taken.

However, in the conventional CRT device using the above-described conductive mesh 81, the image quality and the efficiency of absorbing the interfering electromagnetic waves due to the shielding of the fluorescent material by the conductive mesh are affected by the arrangement density of the conductive mesh. Contrary to this, there is a problem that embedding the conductor mesh 81 in the display plane portion 21 is expensive in manufacturing cost. The frequency band in which the conductor mesh 81 can absorb electromagnetic waves is
Up to the MHz band was the upper limit. That is, there is a problem that it is not possible to cope with electromagnetic wave absorption up to the GHz band, which has been a problem in recent years.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a cathode ray tube display device which can efficiently absorb interfering electromagnetic waves from the MHz band to the GHz band, does not interfere with the light emission characteristics of the CRT, and is excellent in mass productivity. It is.

[0006]

According to the present invention, there is provided a cathode ray tube display device in which a magnetic loss material layer is formed on one or both of an inner surface and an outer surface of a display flat portion of the cathode ray tube. Wherein the magnetic loss material layer forms an entire surface, a lattice shape, a stripe shape, or an island shape.

That is, the present invention provides at least a cathode ray tube,
In a cathode ray tube display device having a deflection yoke as a main component, a magnetic loss material layer is formed on an inner surface of a display flat portion of the cathode ray tube, and a phosphor is formed on the magnetic loss material layer in a predetermined pattern. Is a cathode ray tube display device formed by the above method.

Further, the present invention provides at least a cathode ray tube,
In a cathode ray tube display device having a deflection yoke as a main component, a magnetic loss material layer is formed on an outer surface of a display flat portion of the cathode ray tube, and a phosphor is provided on an inner surface of the display flat portion of the cathode ray tube. Is a cathode ray tube display device formed in a predetermined pattern.

Further, the present invention provides the above-mentioned magnetic loss material layer,
A cathode ray tube display device is formed on the entire surface of the display flat portion.

[0010] Further, according to the present invention, the magnetic loss material layer may include:
This is a cathode ray tube display device formed in a grid on the display plane portion.

[0011] In the present invention, the magnetic loss material layer may include:
A cathode ray tube display device formed in a stripe shape on the display flat portion.

Further, according to the present invention, the magnetic loss material layer may include:
A cathode ray tube display device formed in an island shape on the display plane portion.

Further, the present invention provides the above-mentioned magnetic loss material layer,
M (M is any of Fe, Co, Ni, or a mixture thereof) -X (X is an element other than M and Y, or a mixture thereof) -Y (Y is F, N, O , Or a mixture thereof).

Further, according to the present invention, the magnetic loss material layer preferably comprises:
The cathode ray tube display device is manufactured by any one of the whole surface sputtering method, the sputtering method using masking, or the combination of the whole surface sputtering method and the patterning step.

Further, according to the present invention, the magnetic loss material layer preferably comprises:
This is a cathode ray tube display device manufactured by any one of a whole-surface deposition method, a deposition method by masking, or a combination of a whole-surface deposition method and a patterning step.

The magnetic loss material layer used in the present invention is made of a magnetic loss material presented by the present inventors in Japanese Patent Application No. 2000-52507, and has a function of absorbing electromagnetic wave noise generated by the phosphor. On the other hand, because it has translucency,
It does not block the emission of the phosphor.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cathode ray tube display device according to an embodiment of the present invention will be described below.

(Embodiment 1) FIG. 1 is an explanatory view of a cathode ray tube display device according to Embodiment 1 of the present invention. The cathode ray tube display device of the present invention shown in FIG. 1 is a cathode ray tube display device comprising a cathode ray tube 1 including a shadow mask 5, a phosphor 4, and a deflection yoke 6, wherein the cathode ray tube 1 A magnetic loss material layer 3 is formed on the inner surface of the display flat portion 2. The cathode ray tube in which the phosphor 4 is formed in a predetermined pattern on the inner surface of the magnetic loss magnetic material layer 3. A display device.

FIG. 2 is an enlarged view of the vicinity of the display flat portion 2 in the cathode ray tube display device of FIG. here,
The pattern of the magnetic loss material layer 3 has various patterns for each cathode ray tube display device.
A uniform pattern on the entire surface, or a grid-like pattern, stripe-like pattern, or island-like pattern is the size of the cathode ray tube,
It can be appropriately selected depending on the shape, purpose of use, and the like.

FIG. 3 is a partially enlarged view of the inside of the display flat portion in the cathode ray tube display device, and shows an example in which the pattern of the magnetic loss material is formed in a lattice shape.

The material of the magnetic loss material layer 3 is M (M is Fe, Co, Ni, or a mixture thereof) -X (X is an element other than M and Y). Or a mixture thereof) -Y (Y is F, N, O
, Or a mixture thereof). As an example, the composition of the magnetic loss material layer 3 is set to Fe ₇₂ Al ₁₁ O ₁₇ .

The magnetic loss material layer 3 having the above composition is particularly
It has excellent absorption characteristics from the electromagnetic wave in the Hz band to the electromagnetic wave in the GHz band, and efficiently suppresses the electromagnetic waves in the above band generated from the CRT device.

The present magnetic loss material layer 3 is a composition exhibiting an extremely large magnetic loss effect, and can be much thinner than a conventional sheet-shaped radio wave absorber. Therefore, the thickness of the present magnetic loss material layer 3 may be several tens of microns or less.

As for the electromagnetic wave absorption characteristics of the magnetic loss material layer 3, an electromagnetic wave absorption effect of about 10 dB was obtained at about 3 GHz, as compared with the case of glass alone.

In the method of manufacturing the magnetic loss material layer 3, as a first method, an entire surface sputtering method or an entire surface evaporation method is used. Further, as a second method, a method of performing sputtering or deposition on the entire surface using a metal mask and thereafter removing the metal mask and forming a predetermined pattern is used. further,
As a third method, there is used a method in which a predetermined pattern is formed by performing a lithography process using a resist after once performing a whole surface sputtering or a whole surface deposition.
Further, it can be manufactured by a film forming method other than the sputtering method, for example, a chemical vapor deposition method.

As can be easily understood from the above,
In the manufacturing process of the whole CRT device, the manufacturing process of the magnetic loss material layer 3 can be easily introduced by the same method as that of the phosphor.

(Embodiment 2) FIG. 4 is an explanatory view of a cathode ray tube display device according to Embodiment 2 of the present invention. The cathode ray tube display device shown in FIG.
And a cathode ray tube 1a including a phosphor 4a and a deflection yoke 6
a cathode ray tube display device comprising:
A magnetic loss material layer 3a is formed on the outer surface of the display flat portion 2a of the cathode ray tube 1a, and the phosphor 4a is formed in a predetermined pattern on the inner surface of the display flat portion 2a. A cathode ray tube display device.

Here, the magnetic loss material layer 3a has various patterns for each cathode ray tube display device, for example, a uniform pattern, a lattice pattern, a stripe pattern, and an island pattern. It can be appropriately selected depending on the size, shape, purpose of use, etc. of the cathode ray tube.

Here, the material of the magnetic loss material layer 3a is M (M is Fe, Co, Ni, or a mixture thereof) -X (X is an element other than M and Y). Or a mixture thereof) -Y (Y is F, N, O
, Or a mixture thereof). As an example, the composition of the magnetic loss material layer 3a is set to Fe ₇₂ Al ₁₁ O ₁₇ .

The magnetic loss material layer 3a having the above composition has excellent absorption characteristics particularly from the electromagnetic wave in the MHz band to the electromagnetic wave in the GHz band, and efficiently suppresses the electromagnetic waves in the above band generated from the CRT device. is there.

The present magnetic loss material layer 3a is a composition exhibiting an extremely large magnetic loss effect, and can be much thinner than a conventional sheet-shaped radio wave absorber. Therefore, the thickness of the present magnetic loss material layer 3a may be several tens of microns or less.

As for the electromagnetic wave absorption characteristics of the magnetic loss material layer 3a, an electromagnetic wave absorption effect of about 7 dB was obtained at about 3 GHz as compared with the case of using only glass. Compared with the first embodiment, the effect of absorbing about 3 dB of electromagnetic wave is reduced because the phosphor 4a and the magnetic loss material layer 3a are reduced by the thickness of the display flat portion 2a of the cathode ray tube 1a. This is due to the distance.

The method of manufacturing the magnetic loss material layer 3a is as follows.
As a first method, a whole surface sputtering method or a whole surface evaporation method is used. Also, as a second method,
Using a metal mask, perform sputtering over the entire surface, or vapor deposition over the entire surface, and thereafter, remove the metal mask,
A method of forming a predetermined pattern is used. Further, as a third method, a method is used in which a predetermined pattern is formed by performing a lithography process using a resist after once performing the entire surface sputtering or the entire surface deposition.

As can be easily understood from the above,
The manufacturing process of the magnetic loss material layer 3a can be easily introduced at any stage in the manufacturing process of the entire CRT device.

[0035]

As described above, according to the present invention, there is provided a cathode ray tube display device which can efficiently absorb the interfering electromagnetic waves from the MHz band to the GHz band, does not interfere with the emission characteristics of the cathode ray tube, and is excellent in mass productivity. Is what you can do.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a cathode ray tube display device according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of the vicinity of a display plane portion of the cathode ray tube display device of FIG.

FIG. 3 is a partially enlarged view of the inside of a display flat portion showing an example in which a pattern of a magnetic loss material of a cathode ray tube display device according to an embodiment of the present invention is formed in a lattice shape.

FIG. 4 is an explanatory diagram of a cathode ray tube display device according to a second embodiment of the present invention.

FIG. 5 is an explanatory diagram of a conventional cathode ray tube display device.

FIG. 6 is a diagram showing an example of noise suppression in a conventional cathode ray tube display device.

[Explanation of symbols]

 1, 1a, 11 cathode ray tube 2, 2a, 21 display plane portion 3, 3a, 31 magnetic loss material layer 4, 4a, 41 phosphor 5, 5a, 51 shadow mask 6, 6a, 61 deflection yoke 7, 7a, 71 Electron gun 81 Conductor mesh 9, 9a, 91 Electron beam

Claims (9)

[Claims] 1. A cathode ray tube display device including at least a cathode ray tube and a deflection yoke as main components, a magnetic loss material layer is formed on an inner surface of a display plane portion of the cathode ray tube, and the magnetic loss is further reduced. A cathode ray tube display device, wherein a phosphor is formed in a predetermined pattern on a material layer. 2. A cathode ray tube display device comprising at least a cathode ray tube and a deflection yoke as main components, wherein a magnetic loss material layer is formed on an outer surface of a display flat portion of the cathode ray tube, and a display of the cathode ray tube is provided. A phosphor formed in a predetermined pattern on an inner surface of the flat surface portion. 3. The cathode ray tube display device according to claim 1, wherein the magnetic loss material layer is formed on an entire surface of the display flat portion. 4. The cathode ray tube display device according to claim 1, wherein the magnetic loss material layer is formed in a lattice shape on the display plane portion. 5. The display device according to claim 1, wherein the magnetic loss material layer is formed in a stripe shape on the display plane portion.
Or a cathode ray tube display device according to 2. 6. The display device according to claim 1, wherein the magnetic loss material layer is formed in an island shape on the display plane portion.
3. A cathode ray tube display device according to claim 1. 7. The method according to claim 1, wherein the magnetic loss material layer comprises M (M is F
e, Co, Ni, or a mixture thereof)
-X (X is an element other than M and Y, or a mixture thereof)-Y (Y is any of F, N, O, or a mixture thereof); The cathode ray tube display device according to any one of claims 1 to 6, wherein 8. The method according to claim 1, wherein the magnetic loss material layer is formed by any one of a sputtering method using a whole surface, a sputtering method using masking, and a combination of a whole surface sputtering method and a patterning step.
A cathode ray tube display device according to any one of the above. 9. The method according to claim 1, wherein the magnetic loss material layer is formed by any one of a whole-surface deposition method, a deposition method by masking, and a combination of a whole-surface deposition method and a patterning step. A cathode ray tube display device according to any one of the above.