JP3060766B2 - Image display device and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electron beam generator using a linear cathode for use in a color television receiver or display for displaying characters or images, and a method of manufacturing the same.

[0002]

2. Description of the Related Art A conventional image display device will be described with reference to the accompanying drawings.

FIG. 8 is a perspective view of a main part of a conventional image display device. The display device main body is roughly composed of a back container substrate 2 on which a back electrode 1 (broken line portion) is formed, a plurality of linear hot cathodes 3 serving as electron beam sources, an electrode unit group 4 and a phosphor 5.
Is formed with the front container substrate 6 on which is formed.

The electrode unit group 4 is composed of a plurality of electron beam control electrodes 4a, 4b, 4c and 4d. Each electrode has a circular or rectangular slit through which an electron beam passes. 7 are formed, and the electrodes are stacked and fixed to each other while maintaining a predetermined gap between the electrodes while avoiding the slit region in the central region of the electrodes.
It is fixed by the adhesive spacer 8. Around each electrode, each electrode is kept at the above-mentioned predetermined gap, and
A plurality of insulating spacers 10 made of ceramic are provided so as to be fixed to the back container substrate 2 through the base member, and these are fastened by fixing screws 11 to form the electrode unit group 4. It is fixed to the substrate 2.

The operation will be described below. When a predetermined current is applied to the linear hot cathode 3 and a predetermined potential is applied to the back electrode 1, the plurality of electron beam control electrodes 4a, 4b, 4c, 4d, and the phosphor 5, the electron beam is changed to the electron beam control electrode 4a. Pulled out towards. Electron beam control electrode 4
a, 4b, 4c, and 4d are provided with slits 7 through which the electron beams pass, respectively. The electron beams are controlled, focused, and deflected by the voltage applied to each electrode while passing through these slits. Phosphor 5 to which high voltage is applied
The image is displayed by causing the phosphor 5 to emit light.

At this time, the insulating spacer 10 is moved to the position shown in FIG.
As shown in FIG. 10, electrical insulation is ensured by using a ceramic sintered product 12, while the fixing plate 9 is provided on the surface where the electrode 4a abuts on the metal component 13 as shown in FIG. , A plurality of sintered ceramic plates 14 similar to the insulating spacer 10 are mounted.

[0007]

Although the image display device having the above-described structure can ensure the basic image display characteristics, it has the following problems.

That is, when forming the electrode unit group 4, each of the electron beam control electrodes 4a, 4b, 4c and 4d is positioned with the adhesive spacer 8 interposed therebetween.
The insulating spacers 10 are also positioned, and the adhesive frit attached to the adhesive spacers 8 is melted and solidified in a firing furnace to form the electrode unit group 4. In this case, it is difficult to temporarily fix the insulating spacers 10, and the insulating spacers 10 may fall off. Occurred.

The electrode unit group 4 is fixed to the fixing plate 9
When fixing to the back container substrate 2 with the fixing screw 11 through
As shown in FIGS. 9 and 10, the ceramic sintered plate 14 placed on the insulating spacer 10 and the fixing plate 9 is used.
Is a relatively thin plate material similar to the adhesive spacer 8, so that it is easily damaged by the mechanical load in this case, insulation cannot be secured, or the slit 7 of the electron beam control electrode is not provided.
However, the shards were blocked, resulting in image defects. In particular, such a breakage phenomenon occurs remarkably when vibration, drop impact, or the like is applied to the display device main body, because the mechanical brittleness of the ceramic sintered molded product affects the display device body.

[0010] Each of these ceramic sintered molded members is relatively expensive, and this also causes an increase in the cost of the image display device itself.

[0011]

The technical means of the present invention for solving the above problems is as follows.

A means for generating an electron beam in the vacuum vessel, a means for deflecting and converging the electron beam comprising a plurality of stacked electrode groups provided with a plurality of openings, and a method for causing the electron beam to collide with a phosphor. An image display device comprising: means for forming an image, wherein the laminated electrodes are fixedly laminated in the center region with an adhesive spacer, and the periphery of each electrode is mechanically interposed via an insulating spacer of a metal substrate. Fixed and laminated, while specifying the formation of an oxide ceramic insulating thin film on one side of the insulating spacer by thermal spraying, and further forming an amorphous frit glass thin film on the other side, The configuration is such that the gap d1 of the adhesive spacer and the thickness d2 of the insulating spacer before fixing are d1 ≦ d2.

[0013]

The operation of this technical means is as follows.

That is, the insulating spacer has a thin metal substrate as a substrate, and at least one surface thereof is provided with an oxide ceramic insulating layer of about several hundred μm by thermal spraying.
Similarly, the fixing plate has a configuration in which an insulating layer is provided on the metal substrate surface in the same manner. As a result, the elasticity of the metal and the anti-impact characteristics utilizing the peculiarity of the sprayed film structure are improved against the mechanically applied load, which has been a problem in the past, and the insulation properties are completely ensured. Can be formed in a short time and the cost is low. Also, by forming an amorphous frit glass on the other surface of the insulating spacer, the thickness of the insulating spacer is adjusted, and the thickness error with the adhesive spacer is reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an image display device according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of an embodiment of the image display apparatus of the present invention, and FIG. 2 is a sectional view taken along the line aa of FIG. In the figure, reference numeral 15 denotes a back container substrate, which is formed of a flat glass substrate, and has a back electrode 16 formed on one surface thereof. In addition, this back container substrate 1
5 is provided with a concave glass surface container substrate 17 that is vacuum-sealed around its periphery.

A phosphor 18 is provided on a surface of the front container substrate 17 facing the back electrode 16. Back container substrate 1
A plurality of fixing posts 19 are adhered to 5, and a metal member 20 is attached to an upper portion thereof. Further, a fixing plate 21 is provided so as to be mounted on the metal member 20, and the electrode unit group 22 is mounted on the fixing plate 21.

The electrode unit group 22 includes a plurality of electrode beam controllers 22a, 22b, 22c, 22d, 22e and 22.
As shown in FIG. 2, the central region is laminated and bonded with a predetermined gap as shown in FIG. Each electrode is formed with a slit through which an electron beam passes as shown in the conventional example, and the space between the back electrode 16 and the electron beam control electrode 22a is spaced apart from the back electrode 16 by a predetermined distance (not shown). A plurality of spaced apart hot cathodes (not shown) are provided in the longitudinal direction of the electrode.

Further, as shown in the drawing, insulating spacers 24 are inserted between the respective electrodes around the electrodes, and the electron beam control electrodes 22a, 22a,
2b, 22c, 22d, 22e, and 22f, the fixing plate 21 and the metal member 20 of the fixing post 19 are fixed.

As described above, the back container substrate 15 and the front container substrate 17
Thereby, a high vacuum state is maintained inside the container.

At this time, in this embodiment, as shown in FIG.
The insulating spacer 24 has a configuration in which an insulating film 27 is formed on a thin metal substrate 26, and the entire thickness is about 400
μm, of which the metal substrate 26 is about 200 μm
It is about. Even if the insulating film 27 is a thin film, it is necessary to be a considerably thick film in order to ensure insulation. In the present invention, an oxide ceramic is formed by a thermal spraying method.

On the other hand, as shown in FIG. 4A, the fixed plate 21 is provided with an electron beam control electrode 22a of a metal processing substrate 28.
The insulating film 29 is provided on the surface in contact with the insulating spacer 29 by the same thermal spraying method as the insulating spacer 24. At this time, as shown in FIG.
4 or a structure in which an insulating film 31 is formed on a thin metal substrate 30 by the same method as shown in FIG.

As described above, in the case of the insulating spacer 24 and the fixing plate 21 in which the insulating film is formed on the surface of the metal substrate by the thermal spraying method, it is difficult to sufficiently secure the electric insulating performance which is a basic function thereof. Of course, these insulating spacers and plates may be damaged when the insulating spacers are damaged due to the mechanical load applied when fastening with the fastening screw, which has been a problem with conventional ceramic sintered molded products, and especially when a drop impact is applied. Insulation failure and image defect failure due to breakage of the sintered ceramic shaped member, due to the elasticity of the metal and the sprayed film structure having a laminated structure with a slight semi-density as shown in FIGS. It becomes strong against the load to the vertical load, and as a result, the anti-shock property is improved, and such a failure due to the damage of the insulating film can be solved.

(Embodiment 2) FIG. 5 shows a second embodiment of the present invention.
Is shown.

That is, as the insulating spacer 24 ', an insulating film 33 made of oxide ceramic is formed on one surface of the thin metal substrate 32 to a predetermined thickness, and on the other surface, an amorphous adhesive film is formed by spraying or printing. The frit 34 is formed, and the thickness of the entire spacer is
The thickness of each of the electron beam control electrodes is slightly larger than the thickness of the adhesive spacer 23 for adhesively fixing the electron beam control electrodes at a predetermined gap in the central region.

The operation and effect of this embodiment are as follows. That is, as shown in FIG. 6A, the gap between the electrodes is determined by the thickness d1 of the adhesive spacer 22. Therefore, when the thickness d2 of the insulating spacer 24 'for fixing the periphery is d1> d2, the adhesive spacer 2'
A bending moment 35 is generated with the end face of No. 3 as a fulcrum, and a breakage 36 as shown in FIG.

On the other hand, in the case of d1 <d2, conversely, a force acts to peel off the adhesive spacer 23 and the electrode 22 '.

In order to solve these problems, it is necessary to finely control the thickness of the insulating spacer 24 'and the adhesive spacer 23, and it is very difficult to control the thickness of the insulating film by forming a film by a thermal spraying method or the like. Have difficulty.

Therefore, in this embodiment, since the amorphous adhesive frit 34 is formed on one side as described above and the entire thickness is made larger than the thickness of the adhesive spacer 23, the electrode unit group 22 is formed by the adhesive spacer 23. When it is formed and fixed with the fastening screw 25 ', as shown in FIG.
In the firing furnace, the amorphous frit 34 is melted to adjust the thickness gap with the thickness gap d1 of the adhesive spacer 23,
The excess frit 37 is protruded, adjusted to d1 = d2, and then solidified in its thickness state.
At this time, the frit 34 also has an effect that the insulating spacer 24 'can be temporarily fixed between the electrodes.

As a result, the problem caused by the dimensional mismatch described above is solved, and an image display device excellent in both functions and productivity can be provided. At this time, the amorphous frit 34
Can be formed by either the printing method or the thermal spraying method, but it is natural that the thermal spraying method is desirable from the viewpoint of the same process.

(Embodiment 3) FIG. 7 shows a third embodiment of the present invention.
Is shown.

In this embodiment, an insulating spacer 24 "is formed directly on the electrode surface 22". Until now, an insulating film formed by spraying a thin metal part processed into a predetermined shape has been used. Although the insulating spacer is placed between the electrodes, the members and steps are omitted in the present invention, and the thermal spraying torch 38 is directly moved to the electrode surface 22 "in a spot-like manner to form the spacer 24". Although not shown in the present embodiment, they are formed by a mask method adapted to the shape of the spacer.

According to this method, the whole process can be simplified, and the material cost can be greatly reduced, which has a great effect.

[0034]

As described above, according to the present invention, the following effects can be obtained.

That is, the insulating spacer has a thin metal substrate as a substrate, and at least one surface thereof is provided with an oxide ceramic insulating layer of about several hundred μm by thermal spraying.
Similarly, the fixing plate has a configuration in which an insulating layer is provided on the metal substrate surface in the same manner.

[0036] Therefore, against the mechanically applied load, which has been a problem in the past, the elasticity of the metal and the anti-impact characteristics utilizing the peculiarity of the sprayed film structure are improved, and the insulation is completely secured. A thin film having a thickness of several hundreds of μm can be formed in a short time, resulting in low cost.

Further, by forming an amorphous frit glass on the other surface of the insulating spacer, the thickness of the insulating spacer can be adjusted, the thickness error with the adhesive spacer can be reduced, and a manufacturing method with a sufficient margin can be provided. It is possible to provide a method of manufacturing an image display device having high productivity as a whole.

[Brief description of the drawings]

FIG. 1 is a sectional view of an image display device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line aa of FIG. 1;

FIG. 3 is a configuration diagram of an insulating spacer in the embodiment.

FIG. 4 is a configuration diagram of a fixing plate in the embodiment.

FIG. 5 is a configuration diagram of an insulating spacer according to a second embodiment of the present invention.

FIG. 6 is a schematic diagram showing the effect of the thickness of the insulating spacer and the adhesive frit.

FIG. 7 is a schematic view of a manufacturing method of forming an insulating spacer directly on an electrode by a thermal spraying method according to a third embodiment of the present invention.

FIG. 8 is a perspective view showing a conventional image display device.

FIG. 9 is a configuration diagram of a conventional insulating spacer.

FIG. 10 is a configuration diagram of a conventional fixing plate.

[Explanation of symbols]

 15 Back Container Substrate 16 Back Electrode 17 Front Container Substrate 18 Phosphor 21 Fixing Plate 22 Electrode Unit Group 23 Adhesive Spacer 24 Insulating Spacer Die 27 Thermal Spray Insulating Film 34 Amorphous Adhesive Frit 38 Thermal Spray Torch

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-60-232618 (JP, A) JP-A-4-249048 (JP, A) JP-A-2-257550 (JP, A) JP-A-4-232 206422 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) H01J 29/46 C23C 4/12 H01J 9/02 H01J 31/12

Claims (3)

(57) [Claims] A means for generating an electron beam in a vacuum vessel; a means for deflecting and converging the electron beam comprising a plurality of stacked electrode groups provided with a plurality of openings; and impinging the electron beam on a phosphor. An image display device comprising: means for forming an image by causing the laminated electrode to be fixedly laminated in the center region with an adhesive spacer, and the periphery of each electrode is mechanically arranged via an insulating spacer of a metal substrate. The insulating spacer is formed on one side of the insulating spacer by a thermal spraying method, and the other side of the insulating spacer is formed of an amorphous frit glass thin film. Gap d1 and thickness d2 of insulating spacer before fixing
Wherein d1 ≦ d2. 2. An image display apparatus according to claim 1, wherein the amorphous system frit glass formed by spraying method, printing method 3. A means for generating an electron beam in a vacuum vessel, means for deflecting and converging the electron beam comprising a plurality of stacked electrode groups provided with a plurality of openings, and impinging the electron beam on a phosphor. And an image display device comprising means for forming an image by means of a spraying method, wherein a spacer made of an insulating ceramic thin film having a thickness of several hundred μm for laminating and fixing each electrode is formed around the laminated electrode by a thermal spraying method. A method of manufacturing an image display device, wherein the method is directly formed on an electrode surface.