JP3402073B2 - Picture tube device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a picture tube device used for televisions, displays and the like.

[0002]

2. Description of the Related Art A conventional cathode-ray tube device includes a glass bulb having a front panel portion, a funnel portion, and a neck portion formed in order, an electron gun arranged in the neck, and an electron gun on the outer peripheral surface of the glass bulb. Horizontal deflection coil for generating a deflection magnetic field for horizontally deflecting the electron beam generated by the gun, a support made of an insulating material for mounting the deflection coil, and vertically deflecting the electron beam generated by the electron gun And a deflection device formed by sequentially stacking vertical deflection coils for generating a deflection magnetic field. And, in order to at least virtually prevent the generation of undesired sounds during the operation of the picture tube device, they are opposed via a glass bulb, FIG.
Polyurethane foam 19 which is an insulating material as shown in
It is known that the soft magnetic element 20 surrounded by is provided between the horizontal deflection coil and the vertical deflection coil substantially parallel to the magnetic field of the vertical deflection coil (Japanese Patent Laid-Open No. 3-46).
No. 736).

By the way, in recent years, in the picture tube apparatus, it is necessary to increase the deflection apparatus power to strengthen the deflection magnetic field or to increase the deflection frequency of the deflection apparatus as the picture tube becomes wider in angle and higher in resolution.

[0004]

However, in the above-mentioned conventional picture tube device, the deflection magnetic field of the deflection device is strengthened,
If the deflection frequency of the deflection device is increased, the soft magnetic element 2
0 generates heat, and the polyurethane foam 19 surrounding the support made of an insulating material and the soft magnetic element 20 is deformed to disturb the magnetic fields of the deflection coil and the soft magnetic element 20 of the deflecting device, which deteriorates the image. It was

It is an object of the present invention to provide a picture tube device capable of reducing heat generation of a soft magnetic element and obtaining a good image.

[0006]

The picture tube device of the present invention comprises:
A glass bulb formed by sequentially forming a front panel portion having a fluorescent screen surface on the inner surface, a funnel portion and a neck portion, an electron gun disposed in the neck portion and irradiating an electron beam to the fluorescent screen surface, and the glass bulb. A color picture tube device comprising a horizontal deflection coil, a coil mounting support, and a vertical deflection coil on the outer peripheral surface of the deflection device, which face each other across the funnel portion and the neck portion . Two magnetic synthetic trees
A plate-shaped metal magnetic material sandwiched and surrounded by a fat plate is disposed between the glass bulb and the vertical deflection coil substantially in parallel with the magnetic field of the vertical deflection coil.

With this structure, the magnetic flux that tries to pass through the metal magnetic body is divided into the metal magnetic body and the magnetic synthetic resin body, so that the eddy current generated in the metal magnetic body is reduced, and the metal magnetic body is reduced. It is possible to reduce the heat generation, and it is also possible to enhance the effect of converging the lines of magnetic force by the metal magnetic body and the magnetic synthetic resin body.

In the picture tube device of the present invention, the width of the metal magnetic body on the fluorescent screen side is made wider than the width of the metal magnetic body on the neck portion side.

With this configuration, it is possible to form a magnetic field distribution which can obtain good convergence and raster distortion even in a wide-angle and high-resolution picture tube.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 4, a color picture tube device according to one embodiment of the present invention is a glass which is formed by sequentially forming a front panel portion 2 having a fluorescent screen surface 1 on an inner surface thereof, a funnel portion 3 and a neck portion 4. A bulb 5, a shadow mask 6 arranged to face the fluorescent screen surface 1, an in-line electron gun 8 arranged in the neck portion 4 for irradiating the fluorescent screen surface 1 with an electron beam 7, a funnel portion 3 and a neck portion 4. The deflection device 9 is provided on the outer peripheral surface of the.

As shown in FIGS. 1 and 2, the deflection device 9
Is a pair of horizontal deflection coils 11 for generating a pincushion magnetic field inside the coil mounting support 10 made of an insulating resin material, and a pair for generating a barrel magnetic field Y outside the coil mounting support 10. Vertical deflection coil 1
2 are provided, and a ferrite core 13 for strengthening magnetic flux is attached to the outer circumference of the vertical deflection coil 12. Further, magnetic synthetic resin bodies facing each other with the funnel portion 3 and the neck portion 4 of the glass bulb 5 sandwiched therebetween. 14a, 14b
The metal magnetic bodies 15a and 15b surrounded by are fixed substantially parallel to the barrel magnetic field Y of the vertical deflection coil 12 and on the surface of the coil attachment support 10 on the vertical deflection coil 12 side.

As shown in FIG. 3, the metal magnetic material 15a (1
5b) is composed of a single metal plate which is a high magnetic permeability material such as μ metal having a plurality of slits 16 in the tube axis X direction of the glass bulb 5, a silicon steel plate, and the like. The width g is made wider than the width f on the side of the neck 4
It is shaped like a letter. The magnetic synthetic resin body 14a (14b) is made up of two T-shaped resin plates 17, 1 made of a material such as a ferrite sheet or rubber ferrite.
In this embodiment, the resin plate 17 and the resin plate 18 are adhesively fixed with a double-sided tape or the like to surround and fix the metal magnetic body 15a (15b).

In the embodiment of the present invention,
Metal magnetic body 15a (15b) and magnetic synthetic resin body 1
As shown in FIG. 1, 4a (14b) is preferably made of an elastic material because it is attached along the coil attachment support 10. Further, in the same embodiment, the metal magnetic body 15a
Although the shape of (15b) is described as a T-shape, a trapezoidal shape in which the width g on the fluorescent screen surface 1 side is wider than the width f on the neck portion 4 side, or the width g on the fluorescent screen surface 1 side and the neck portion 4 is used.
A rectangular shape or the like having the same width f on the side may be used.

Next, the operation and effect of the color picture tube device will be described. In the color picture tube device according to the embodiment of the present invention, by using the metal magnetic bodies 15a and 15b surrounded by the magnetic synthetic resin bodies 14a and 14b, the magnetic flux passing through the metal magnetic bodies 15a and 15b is The metal magnetic body 15a (15b) and the magnetic synthetic resin body 14a (14
b), the eddy current generated in the metal magnetic bodies 15a, 15b becomes small, and the metal magnetic bodies 15a, 15b
Support 1 for coil mounting capable of reducing heat generation of b
The deformation of 0 can be prevented. As a result, a good image with reduced misconvergence and raster distortion can be obtained.

Further, the color picture tube device according to the embodiment of the present invention has a problem in that the misconvergence and the raster distortion are increased with the widening of the picture tube, and the magnetic synthetic resin bodies 14a and 14b and the metal magnetic body are used. 15a, 1
Since 5b is a magnetic material, the effect of converging the lines of magnetic force can be enhanced between the magnetic synthetic resin body 14a and the metal magnetic body 15a and the magnetic synthetic resin body 14b and the metal magnetic body 15b. Good images with reduced misconvergence and raster distortion can be obtained.

Further, in the color picture tube device according to one embodiment of the present invention, the width g of the metal magnetic body 15a (15b) on the fluorescent screen surface 1 side is equal to the width of the metal magnetic body 15a (15b) on the neck portion 4 side. By making the width wider than f, a magnetic field distribution capable of preventing misconvergence and raster distortion is formed even in a wide-angle and high-resolution picture tube, so that a better image can be obtained. Since the plurality of slits 16 of the metal magnetic body 15a (15b) are provided in the tube axis X direction of the glass bulb 5, the metal magnetic body 15a (1
The eddy current of 5b) becomes small, and the metal magnetic material 15a (15
The heat generation of b) can be further reduced.

[0018]

EXAMPLES Next, examples of the present invention will be described.

The color picture tube device of the present invention having the structure shown in FIG. 1 (hereinafter referred to as the present invention product) is a magnetic synthetic resin body 14a, 1 made of a ferrite sheet having the dimensions shown in FIG.
4b and metal magnetic bodies 15a and 15b made of μ metal
Was used. In each dimension a to j shown in FIG. 3, a is 12 mm,
b is 20 mm, c is 14 mm, d is 35 mm, and e is 0.
8 mm, f is 10 mm, g is 18 mm, h is 15 mm,
i is 33 mm and j is 0.1 mm.

For comparison with this, metal magnetic bodies 15a and 15b surrounded by magnetic synthetic resin bodies 14a and 14b.
Instead of polyurethane foam 1 of the dimensions shown in FIG.
A conventional color picture tube device (hereinafter referred to as a conventional product) using a soft magnetic element 20 made of a rectangular μ metal surrounded by 9 was also manufactured. In each dimension shown in FIG. 6, b is 20 mm,
d is 35 mm, e is 0.8 mm, g is 18 mm, i is 3
3 mm and j are 0.1 mm.

Then, these color picture tube devices are operated, and the saturation temperature when the saturation temperature of the deflecting device is reached (the magnetic synthetic resin body 14 is passed through the coil mounting support 10).
(The temperature of the surface of the coil mounting support 10 facing a)
And the amount of change in misconvergence and raster distortion at the start of operation of the color picture tube device and when the saturation temperature of the deflection device was reached, the following results were obtained.

As shown in FIG. 5, the conventional product (curve B) had a saturation temperature of about 106 ° C., which exceeded the heat distortion temperature (deflection device guarantee temperature) of the coil mounting support of about 100 ° C. It was confirmed that the invention product (curve C) had a saturation temperature of about 96 ° C., which was lower than the heat distortion temperature of the coil mounting support. As a result, in the conventional product, the polyurethane foam surrounding the coil mounting support and the soft magnetic element was deformed, and the amount of change in misconvergence and raster strain could not be measured excessively. It was confirmed that the amount of change in convergence and the amount of change in raster distortion were each about 0.1 mm, and a good image could be obtained.

[0023]

As described above, according to the present invention, it is possible to obtain a good image with reduced misconvergence and raster distortion by using the metal magnetic material surrounded by the magnetic synthetic resin material. Further, by making the width of the metal magnetic body on the fluorescent screen surface side wider than the width of the metal magnetic body on the neck portion side, a better image can be obtained.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a color picture tube device according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view showing a metal magnetic body surrounded by a magnetic synthetic resin body used in the deflecting device of the color picture tube device.

FIG. 4 is a side view showing a color picture tube device according to an embodiment of the present invention.

FIG. 5 is a diagram showing a saturation temperature when the saturation temperature of the deflection device is reached after the color picture tube devices of the embodiment of the present invention and the conventional example are operated.

FIG. 6 is a perspective view showing a soft magnetic element surrounded by polyurethane foam used in a conventional deflecting device.

[Explanation of symbols]

1 Fluorescent screen surface 2 Front panel 3 funnel part 4 neck 5 glass bulbs 7 electron beam 8 electron gun 9 Deflection device 10 Coil mounting support 11 Horizontal deflection coil 12 Vertical deflection coil 14a, 14b Magnetic synthetic resin body 15a, 15b Metallic magnetic material

Continuation of the front page (56) Reference JP-A-2-210742 (JP, A) JP-A-7-176274 (JP, A) JP-A-63-4539 (JP, A) JP-A-63-241844 (JP , A) Actual Kaihei 5-1152 (JP, U) Registered utility model 3010090 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01J 29/76 H04N 9/16

Claims (3)

(57) [Claims] 1. A glass bulb having a front panel portion having a fluorescent screen surface on its inner surface, a funnel portion, and a neck portion, and an electron gun disposed in the neck portion and irradiating an electron beam on the fluorescent screen surface. And a deflection device in which a horizontal deflection coil, a coil mounting support and a vertical deflection coil are sequentially stacked on the outer peripheral surface of the glass bulb, wherein the funnel portion and the neck portion are sandwiched. A plate-shaped metal magnetic body sandwiched between two magnetic synthetic resin plates facing each other at , and substantially parallel to the magnetic field of the vertical deflection coil, and the glass bulb and the vertical direction. A picture tube device, which is arranged between the deflection coil and the deflection coil. 2. The picture tube device according to claim 1, wherein a width of the metal magnetic body on the fluorescent screen side is wider than a width of the metal magnetic body on the neck portion side. 3. The picture tube device according to claim 1, wherein the metal magnetic body and the magnetic synthetic resin body have elasticity.