JPH0992179A - Flat plate display device and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a flat plate display device capable of reducing the number of parts and achieving cost reduction and manufacture thereof while supporting an electrode by acquiring its specified flatness and its position precision toward a screen plate. SOLUTION: An electrode 9 is supported at a frame body 14 having its high rigidity or a frame shaped support body directly or through an electrode support plate. At least one part of the frame body 14 or the frame shaped support body is fixed to a front surface container 2 or a rear surface container 1, at least the other part is pressed to a fixing side by means of a spring body 17, and the frame body 14 or the frame shaped support body is supported elastically. The peripheral end of each of the front surface container 2 and the rear surface container 1 is welded, respectively, by means of a welding material 31 welded by heating it at a temperature equal to or higher than its melting point.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat-panel display device used as a picture tube in a television receiver, a terminal display of a computer, etc., and a method for manufacturing the same.

[0002]

2. Description of the Related Art In recent years, a fluorescent display of a picture tube is divided into a large number of small areas, and an electron beam is scanned in units of the divided small areas to display one image as a whole. Is in the limelight. Such flat-panel display devices are disclosed, for example, in JP-A-4-160741, JP-A-4-174948 and JP-A-4-24902.
No. 9 and other publications.

A display device of this type will be described with reference to FIG. 9 showing an exploded perspective view of the whole structure of the display device. The display device is made of a glass container at the peripheral portion of a back container 1 made of a flat rectangular glass plate. The opening edge of the front case 2 is hermetically sealed by the adhesive material 31 made of a frit glass layer, and the inside of the outer case made up of the rear case 1 and the front case 2 is kept in a vacuum state.

A rectangular electrode support plate 7 in which a plurality of cathodes 4 for generating electron beams are arranged in parallel and insulated and supported inside the outer case which is brought into a vacuum state.
And a screen plate 8 having a phosphor screen on which an image is displayed and covered by the front case 2, and a plurality of plate-shaped electrodes 9 for controlling an electron beam directed from the cathode 4 to the phosphor screen of the screen plate 8.
And are installed. Although not shown in the drawings, these plate-shaped electrodes 9 focus or deflect the thermoelectrons emitted from the cathode 4 into a large number of electron beams, and therefore a large number of electron beams that allow the electron beams to pass therethrough. It has a through hole. Further, a back electrode for directing thermoelectrons emitted from the cathode 4 toward the screen plate 8 is provided on the back surface of the cathode 4.

Each of the electrodes 9 is connected to the electrode supporting plate 7 by bolts 10 at four corners in a state of being laminated in a plurality of layers. The central portion of each of the four sides of the electrode supporting plate 7 is fixed to the four projecting center fixing bases 11 fixed to the rear case 1 by the adhesive material 3 by welding means such as welding or brazing. . Electrode support plate 7
The four corners of the back container 1 are as shown in FIG. 10 (a) showing a schematic side view of a part of the display device.
It is placed on the upper end surface of four projecting corner fixing bases 12 fixed by the adhesive material 3 and is pressed by the leaf springs 13 attached to each corner fixing base 12. Although not shown, the electrodes 9 are attached by being laminated and arranged with an insulating layer made of glass interposed therebetween, or being stretched in a tensioned state to maintain flatness.

In the above display device, the central portion of each of the four sides of the rectangular electrode support plate 7 is fixed to the center fixing base 11 arranged on the rear case 1, whereby the bolt 10 is attached to the electrode support plate 7. The relative spacing and relative position of each electrode 9 fixed in step 1 to the screen plate 8 are positioned and fixed with predetermined positional accuracy. Also, the electrode support plate 7
By pressing the four corners of the electrode 9 against the corner fixing base 12 by the leaf springs 13, a predetermined positional accuracy of the electrode 9 in the vertical direction is secured. That is, a predetermined positional accuracy of the electrode 9 with respect to the screen plate 8 is ensured so that an image with good image quality can be obtained.

The rear container 1 and the front container 2 are shown in FIG.
In the state of 0 (a), the opening edge of the front container 2 is superposed on the peripheral portion of the rear container 1 with the adhesive 31 interposed, and exposed to a high temperature higher than the melting point of the adhesive 31 to melt the adhesive 3. Through the steps, they are welded to each other in a sealed state by the adhesive material 31. The adhesive material 31 has a lower melting point than the adhesive material 3 for fixing the fixing bases 11 and 12. In this welding step, when the electrode support plate 7 is heated to a temperature higher than the melting point of the adhesive material 31, the electrode support plate 7 is heated by a difference in thermal expansion between the back container 1 and the electrode support plate 7, as shown in FIG. It extends against the biasing force of the spring pressure of 13. As a result, the rear case 1 can be prevented from cracking due to the concentration of thermal stress, and the four corner portions of the electrode support plate 7 are simply pressed by the leaf springs 13 without being fixed to the corner fixing base 12. Therefore, when the temperature returns to room temperature after the high temperature heating, the leaf spring 1
The restoring force of No. 3 restores the state of FIG. 10 (a) to ensure the positional accuracy of each electrode 9.

[0008]

However, as shown in FIG. 11, the electrode supporting plate 7 has four strip-shaped pieces 7 as shown in FIG.
a to 7d are combined in a rectangular shape that matches the electrode 9, and the overlapping portions that form the four corners thereof are formed into the electrode 9
Since they are simply joined by the fixing bolts 10, the whole shape is easily deformed and the rigidity is low. Therefore, the electrode supporting plate 7 is partially plastically deformed after being heated at a high temperature for connecting the above-described containers 1 and 2, and it is difficult to return to the original shape. On the other hand, the leaf spring 13 cannot be set to apply a large spring pressure to the electrode supporting plate 7 because the rigidity of the electrode supporting plate 7 is low, and the electrode supporting plate 7 is pressed against the corner fixing base 12. It simply holds it stretchable. Therefore, the leaf spring 13 does not have a function of correcting the deformed electrode support plate 7.

As described above, the electrode supporting plate 7 and the leaf spring 13 of the conventional apparatus have an extremely insufficient function of returning the electrode 9 and the electrode supporting plate 7 which are deformed at the time of high temperature heating to the original shape. Therefore, the electrode 9 remains deformed so as to warp, and there is a problem that it is difficult to secure the flatness of the electrode 9 within a value of ± 10 μm necessary for displaying a good image quality. When applied to a display device for video equipment, the image quality is greatly affected.

Further, since the electrode supporting plate 7 is easily deformed, four center fixing bases 11 and four corner fixing bases 12 are required to support the electrode supporting plate 7 on the rear case 1. On the other hand, the electrode support plate 7 is formed by connecting four strip-shaped pieces 7a to 7d in a rectangular shape. Therefore, the number of parts is relatively large, and as the number of parts is increased, the number of manufacturing steps such as a welding process using the adhesive 3 is also increased, resulting in a considerable cost increase.

Therefore, the present invention maintains the predetermined flatness of the electrodes and secures the positional accuracy with respect to the screen plate so that a good image quality can be obtained, and the number of parts is reduced to achieve cost reduction. An object of the present invention is to provide a flat panel display device and a manufacturing method thereof.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention forms an outer case by hermetically welding the peripheral edges of a front container and a rear container. A cathode that generates an electron beam, a screen plate having a phosphor screen, a plurality of electrodes that control the electron beam from the cathode to the phosphor screen, have high rigidity, and A frame supporting an electrode is provided, and at least one part of the frame is fixed to the front container or the back container, and at least another part facing the fixed part is the front container. Alternatively, a flat-panel display device is provided, which is pressed and fixed by a spring body fixed to a back container.

In the above invention, the frame body has a rectangular shape, and at least one of the four corners of the rectangular shape has a corner fixing base with a projection-shaped front container or The central portion of at least one of the three sides of the frame that is fixed to the back container and faces the corner fixing base is pressed in the direction of the corner fixing base by a spring body attached to the front container or the rear container. It is preferable that the structure is fixed.

Further, according to the present invention, the outer casing is constructed by hermetically welding the peripheral portions of the front casing and the rear casing, and the outer casing is kept in a vacuum state.
A cathode for generating an electron beam, a screen plate having a phosphor screen, a plurality of electrodes for controlling an electron beam from the cathode to the phosphor screen, and a plurality of electrode support plates for individually supporting each electrode, A frame-shaped support body that has rigidity and supports each of the electrode support plates is installed, and at least one portion of the frame-shaped support body is fixed to the front container or the rear container, and this fixed portion It is also possible to adopt a configuration in which at least another portion facing to is pressed and fixed by a spring body fixed to the front container or the rear container.

In the above invention, the electrode support frame and the frame-shaped support have a rectangular shape, and the frame-shaped support has at least one corner of four rectangular corners protruding. Is fixed to the front container or the rear container via the corner fixing base, and the central portion of at least one of the three sides of the frame-shaped support facing the corner fixing base is the front container or the rear container. It is preferable that the attached spring body is pressed and fixed in the direction of the corner fixing base.

In each of the above inventions, the frame body or the frame-shaped support body is integrally formed by any means such as sheet metal welding, casting or roll forming, while the spring body is constituted by a leaf spring. At the same time, this leaf spring is attached to the rear container or the front container so as to exert a spring force in a parallel direction, so that the pressing force acts in the direction toward the fixing portion of the frame body or the frame-shaped support body. This is preferable because the positional accuracy of the electrode with respect to the screen plate can be surely improved.

Further, according to the present invention, at least one portion of the frame body or the frame-shaped support body supporting the electrodes is fixed to the front container or the rear container via the corner fixing base, and
A support state in which at least another part of the frame body or the frame-shaped support body is pressed toward the corner fixing base side by a spring body so that the frame body or the frame-shaped support body can expand and contract with respect to the front container or the rear container. And a step of polymerizing the respective peripheral end portions of the front container and the rear container with an adhesive material interposed therebetween, and by the adhesive material heated to a temperature higher than the melting point of the adhesive material and melted. And a step of welding the front container and the rear container to each other to hermetically seal them.

[0018]

According to the present invention, an electrode is supported on a frame or frame-shaped support having high rigidity, and at least one part of the frame or frame-shaped support is fixed to a back electrode or a front electrode. Therefore, the positional accuracy of the distance between the electrode supported by the frame or the frame-shaped support and the screen plate can be ensured. In manufacturing, in order to weld the peripheral edges of the back electrode and the front electrode, when the adhesive is melted by exposing it to a high temperature higher than the melting point of the adhesive for welding, a frame or frame-like support is used. Due to the difference in thermal expansion between the body and the back electrode or the front electrode, the frame body or the frame-shaped support body expands while deforming the spring body against the pressing force of the spring body.
In this way, since the above thermal expansion difference is absorbed by the spring body,
It is possible to reliably prevent the back container or the front container from cracking due to the concentration of thermal stress.

Since the frame body that supports the electrodes or the frame-shaped support body that supports the electrodes through the plurality of frame bodies has high rigidity, a spring for pressing the frame body or the frame-shaped support body is used. A body with a large spring constant can be used as the body. Therefore, when the above high temperature heating is completed and the temperature returns to room temperature, the frame body or the frame-shaped support body itself has high rigidity and is pressed in the restoring direction by the large spring pressure of the spring body. By doing so, the original state before the high temperature heating is surely restored. Therefore, the electrode supported by the frame or the frame-shaped support is accurately returned to a predetermined relative position with respect to the screen plate, and the flatness of the electrode is predetermined by the frame or the frame-shaped support having high rigidity. Be sure to stay within the value. As a result, displacement of the electrodes with respect to the screen plate is suppressed, so that even when applied to a video device, it is possible to display good image quality with almost no image displacement.

Further, since the frame body or the frame-shaped support body has high rigidity and is difficult to be deformed, this frame body or the frame-shaped support body is
At least one place is fixed to the back electrode or the front electrode, and at least one place is pressed by the spring body fixedly mounted on the back electrode or the front electrode, so that it can be held and fixed with high positional accuracy. it can. Therefore, at least two fixing bases for fixing the frame body or the frame-shaped support body or pressing the frame body-shaped support body with the spring body may be provided. Further, since the frame body or the frame-shaped support body can be formed as an integral structure,
Since the number of parts can be significantly reduced and the number of manufacturing steps can be reduced, a considerable cost reduction can be achieved.

Further, if the frame body or the frame-shaped support body is made into an integral structure by any means of sheet metal welding, casting or roll forming, it has high rigidity, is hard to be deformed, and is in the original state. Since the restoring function is excellent, the positional accuracy of the electrode with respect to the screen plate and the flatness of the electrode can be further improved, which is preferable.

On the other hand, the spring body is composed of a leaf spring, and the leaf spring is attached to the rear container or the front container so as to exert a spring force in a parallel direction, and the frame body or the frame-shaped support body is fixed thereto. If a pressing force is applied in the direction toward the location, the frame or frame-shaped support that has expanded due to the difference in thermal expansion from the back container or front container will be moved by the large restoring force of the spring body having a large spring constant. , It is possible to forcibly pressurize in the direction of returning to the original state.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of the entire structure showing a flat panel display device according to an embodiment of the present invention. In FIG. 1, a device having the same or equivalent function as FIG.
In order to simplify the description and facilitate understanding, the same reference numerals are given, the description thereof is omitted, and only different configurations will be described below.

The frame 14 supporting the plurality of electrodes 9 has a rectangular (planar rectangular) integral structure by a manufacturing means such as sheet metal welding, casting or roll forming, and has a high rigidity. One of four rectangular corners (corner) of the frame body 14 is brazed or brazed onto the protruding corner fixing base 12 fixed to the predetermined position of the back container 1 by the adhesive 3. It is fixed by welding or screwing. Further, the central portion of each of the two sides of the three sides facing the fixed corner portion of the frame body 14 is pressed by the spring body 17 made of a leaf spring. That is, the above-mentioned 2 of the frame 14 in the back container 1
A center fixing base 18 integrally formed with an engaging projection is fixed by an adhesive material 3 at a position facing the side, and the spring body 17 has an engaging projection as shown by an arrow in a mounting hole 17a of the spring body 17. 18a is fitted and attached to the center fixing base 18.

FIG. 2 is an enlarged perspective view of the engagement portion between the spring body 17 and the frame body 14. The spring body 17 has the mounting hole 17 described above.
The base 17b is fixed to the center fixing base 18 by fitting the engagement protrusion 18a into the a, and the pressing piece 17d is protruded from the base 17b to the frame 14 side through the curved bent portion 17c. However, due to the restoring force of the bent portion 17c that is slightly bent, the central portion of the side of the frame body 14 is in a direction parallel to the back container 1 indicated by an arrow, that is, the corner fixing base 1 of the frame body 14.
Press toward the fixed position by 2. Here, as the spring body 17 for pressing the frame body 14, since the frame body 14 has high rigidity as described above, a spring body 17 having a large spring constant and capable of generating a strong spring pressure is selected. Is used.

FIG. 3 is a vertical sectional view showing a manufacturing process of the flat panel display device. As shown in FIG. 3A, a plurality of electrodes 9 are positioned and supported by bolts 10 on a frame body 14 that insulates and supports a plurality of linear cathodes 4. Corner fixing stand 1
Positioned and fixed on the rear container 1 via 2,
The pressing piece 17d of the spring body 17 is pressed against the central portion of each of the two sides and fixed on the back container 1. On the other hand, after being attached inside the front case 2 so as to cover the screen plate 8, the opening edge of the front case 2 is polymerized with the adhesive 31 interposed in the peripheral portion of the rear case 2.

In the above state, one corner portion of the frame body 14 is fixed to the rear case 1 through the corner fixing base 12, so that the screen plate of each electrode 9 supported by the frame body 14 is fixed. The interval with respect to 8 is ensured with a predetermined positional accuracy. Further, the central portions of the two sides of the frame body 14 are parallel to the back container 1 by the spring body 17, that is, the frame body 14
By being pressed toward the fixing position by the corner fixing base 12 in, the relative position between each electrode 9 supported by the frame body 14 and the screen plate 8 is set so as to ensure a predetermined positional accuracy. .

In the above-mentioned state, the adhesive 31 is melted by heating it to a temperature higher than the melting point of the adhesive 31, and as shown in FIG. Weld to. The adhesive material 3 for fixing the fixing bases 12 and 18 to the back container 1 has a melting point higher than that of the adhesive material 31 and does not melt during the high temperature heating. At the time of this high temperature heating, the frame body 14 resists the pressing force of the spring body 17 due to the difference in thermal expansion between the frame body 14 and the back electrode 1, and as shown by the arrow while deforming the bent portion 17c of the spring body 17. Extend. As described above, since the spring body 17 absorbs the difference in thermal expansion, it is possible to reliably prevent the back container 1 from being cracked due to the concentration of thermal stress.

Next, when the above high temperature heating is completed and the temperature returns to room temperature, the frame body 14 itself has a high rigidity and is not plastically deformed, and the frame body 14 has a large spring constant. Due to the large restoring force generated by the deformation of the bent portion 17c of the spring body 17, the spring body 17 is forcibly pressed in the direction of returning to the original state. As a result, the frame body 14 surely returns to the original state before the high temperature heating shown in FIG. 3A, and the electrode 9 supported by the frame body 14 is accurately positioned at a predetermined relative position with respect to the screen plate 8. Electrode 9 and screen plate 8
Since the positional accuracy of the relative position with respect to can be secured and the deviation of the image can be suppressed as much as possible, the yield is improved. Moreover, the flatness of the electrode 9 has a high rigidity and hardly deforms.
By 4 it is securely held so as not to warp, and is securely held within a predetermined value. As a result, a predetermined positional accuracy is ensured between the electrode 9 and the screen plate 9, so that it is possible to display a high-quality image with almost no image shift even when applied to a video device. In particular, when the step of fixing the electrode 9 and the step of printing the screen plate 8 are performed separately, the positional accuracy of fixing the electrode 9 is particularly required, so the above manufacturing method is effective.

Further, since the frame body 14 has a high rigidity and is hard to be deformed, the frame body 14 has one corner portion fixed to the back electrode 1 and a spring fixed to the back electrode 1. Only by pressing the central portions of the two sides by the body 17, it is possible to fix with high positional accuracy. Therefore, the frame 1
The fixing bases 12 and 18 as the fixing means of 4 may be three in total, which is significantly smaller than the eight in the conventional device shown in FIG. In addition, since the frame body 14 can be formed as an integral structure, the number of parts can be significantly reduced, and accordingly, the number of manufacturing steps such as the bonding work of the fixing bases 12 and 18 is also reduced. Cost reduction can be achieved.

Further, as shown in FIG. 4, two corner fixing bases 12 are provided corresponding to one corner of the frame body 14, and the center fixing base 18 is a corner of the frame body 14 to be fixed. You may make it provided corresponding to only one side which opposes a part. However, the two corner fixing bases 12 and 12 are so small that thermal stress generated between the corner fixing bases 12 and 12 and the back container 1 at the time of high temperature heating does not cause cracks in the back container 1. It is necessary to arrange them at intervals.

Further, as shown in FIG. 5, one corner fixing base 12 is provided corresponding to one corner of the frame body 14.
The center fixing bases 18 may be arranged corresponding to the three sides of the frame 14 facing the corners to be fixed. This fixed stand 12,
As for the number of 18 to be arranged, a preferable form may be appropriately selected according to the screen size and the like.

As shown in FIG. 6, one of two diagonally opposed corners of the frame 14 is fixed to the corner fixing base 12, and the other corner is fixed to the center fixing base described above. It is also possible to use a spring body (not shown) attached to a corner fixing base 19 which is the same as the one 18 for pressing.

In each of the above embodiments, the case where the frame body 14 supporting the electrode 9 is fixed to the back container 1 has been described. However, as shown in FIG.
Corner fixing base 2 fixed to the front container 2 with the adhesive material 3
Even when the structure is fixed to 0 and pressed by the spring body 18 attached to the center fixing base 21 which is similarly fixed to the front case 2 with the adhesive material 3, the frame body 14 is fixed to the rear case 1 and the above-described embodiments. Of course, the same effect can be obtained.

FIG. 8 is an exploded perspective view of a main part showing another embodiment of the present invention. In this embodiment, a plurality (two in the figure)
Individual plate-shaped electrodes are supported by respective rectangular electrode support frames 22, and then these electrode support frames 22 are mounted on a frame-shaped support 23 to which a plurality of cathodes (not shown) are attached. It will be supported. The frame-shaped support member 23 is equivalent to the frame member 14 in each of the above-described embodiments, and has an integral structure with high rigidity,
It is fixed to the back container 1 or the front container 2 via the fixing bases 12 and 18 in the same manner as described above.

The flat panel display device of this embodiment is particularly effective when a method of supporting the electrodes 9 by a stretching method is adopted. That is, the electrode support frame 22 is formed of an elastic material, and is deformed so as to reduce the mutual distance between the two opposite sides of the electrode support frame 22, and the plate shape, the wire shape, or the strip shape is formed on the two opposite sides. After pulling and fixing both ends of the electrode 9, the electrode supporting frame 22
By releasing the pressing force that is deforming, the plate-shaped electrode 9 is applied with a pulling force in two directions. Therefore, each plate-shaped electrode 9 can be elastically supported by the electrode supporting frame 22 with a high flatness without warping due to the action of the pulling force, and thus the electrode supporting frame 2 supporting the electrode 9 is frame-shaped supported. By being supported by the body 23, the positional accuracy of the electrode 9 and the screen plate 8 can be ensured.

[0038]

As described above, according to the present invention, the flatness of the electrode can be reliably ensured within a predetermined value by supporting the electrode on the frame body or the frame-shaped support body having high rigidity. . Further, by fixing at least one part of the frame body or the frame-shaped support body to the back container or the front container, it is possible to secure the distance between the electrodes and the screen plate with a predetermined positional accuracy. Further, by pressing at least one other part of the frame body or the frame-shaped support body with a spring body, the thermal expansion of the frame body or the frame-shaped support body at the time of high temperature heating when welding the back container and the front container. It is possible to extend due to the difference and prevent cracking due to the concentration of thermal stress in the back container or front container, while the restoring force of the spring body forcibly applies the frame or frame-shaped support in the direction of returning to the original state. By pressing, the electrode can be returned to the state in which there is no displacement with respect to the screen plate. Due to the above points, even when applied to a video device, it is possible to display a high quality image with almost no image shift.

Further, since the frame body or the frame-shaped support body has a high rigidity and is hard to be deformed, the fixing base for fixing the frame body or the frame-shaped support body or pressing the spring body by at least 2 is provided.
Since it is only necessary to provide one piece, and since the frame body or the frame-shaped support body can be formed as an integrated structure, the number of parts can be significantly reduced and the manufacturing man-hours can be reduced, so that a considerable cost reduction can be achieved. can do.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an overall configuration of a flat panel display device according to an embodiment of the present invention.

FIG. 2 is a partial perspective view of the above embodiment.

FIG. 3 is a vertical sectional view showing a manufacturing process of the above embodiment.

FIG. 4 is a partial perspective view showing a flat-panel display device according to another embodiment of the present invention.

FIG. 5 is a partial perspective view showing a flat panel display device according to still another embodiment of the present invention.

FIG. 6 is a partial perspective view showing a flat panel display device according to still another embodiment of the present invention.

FIG. 7 is a vertical cross-sectional view showing a flat-panel display device according to still another embodiment of the present invention.

FIG. 8 is a partial exploded perspective view showing a flat-panel display according to still another embodiment of the present invention.

FIG. 9 is an exploded perspective view showing the overall configuration of a conventional flat-panel display device.

FIG. 10 is a partial side view showing the manufacturing process of the same display device.

FIG. 11 is an exploded perspective view of a part of the display device of the above.

[Explanation of symbols]

 1 Back Container 2 Front Container 4 Cathode 8 Screen Plate 9 Electrodes 12, 19, 20 Corner Fixing Stand 24 Frame 18, 21 Center Fixing Stand 22 Electrode Support Plate 23 Frame Support 31 Adhesive

Claims (7)

[Claims] 1. A cathode for generating an electron beam inside the outer case, which is formed by air-tightly welding a peripheral portion of each of a front case and a rear case to each other and which is kept in a vacuum state. A screen plate having a phosphor screen, a plurality of electrodes for controlling an electron beam from the cathode toward the phosphor screen, and a frame body having high rigidity and supporting the electrodes, the frame body Is fixed to the front container or the back container at least at one place, and at least one other position facing this fixed position is fixed by being pressed by a spring body fixed to the front container or the back container. The flat-panel display device characterized by the above. 2. The frame has a rectangular shape, and at least one of the four corners of the rectangular corner has a protrusion-shaped corner fixing base through a front container or a rear container. And a central portion of at least one side of the three sides of the frame facing the corner fixing base is pressed in the direction of the corner fixing base by a spring body attached to the front container or the rear container. The flat-panel display device according to claim 1, which is fixed. 3. A cathode for generating an electron beam inside an outer body case, wherein a front case and a rear case are hermetically welded to each other at their peripheral end portions to form an outer case. A screen plate having a phosphor screen, a plurality of electrodes for controlling an electron beam from the cathode toward the phosphor screen, a plurality of electrode support plates individually supporting each of the electrodes, and having high rigidity, A frame-shaped support for supporting each electrode support plate is provided, and at least one of the frame-shaped supports is fixed to the front container or the back container, and at least another part facing the fixed position is provided. A flat display device, wherein one position is pressed and fixed by a spring body fixed to the front container or the rear container. 4. The electrode support frame and the frame-shaped support have a rectangular shape, and the frame-shaped support has at least one corner of four rectangular corners protruding. 3 is fixed to the front container or the rear container via the corner fixing base and faces the corner fixing base in the frame-shaped support 3
4. The flat panel display device according to claim 3, wherein a central portion of at least one of the sides is pressed and fixed in the direction of the corner fixing base by a spring body attached to the front container or the rear container. 5. The flat-panel display device according to claim 1, wherein the frame body or the frame-shaped support body is made into an integral structure by any means of sheet metal welding, casting or roll forming. 6. The spring body is composed of a leaf spring, and the leaf spring is attached so as to exert a spring force in a direction parallel to the back container or the front container, and the frame body or the frame-shaped support body is fixed to the fixing portion. The flat-panel display device according to any one of claims 1 to 5, wherein the flat-panel display device is pressed in a direction toward. 7. A frame body or a frame-shaped support body supporting an electrode is fixed to at least one part of a front container or a rear container through a corner fixing base, and at least the frame body or the frame-shaped support body is fixed. A step of pressing the other place to the corner fixing base side by a spring body to attach the frame body or the frame-shaped support body to the front container or the rear container in a stretchable support state, and the front container and the rear surface. A step of polymerizing each peripheral end portion of the container with an adhesive material interposed therebetween, and by welding the front container and the rear container to each other by the adhesive material that is heated and melted at a temperature higher than the melting point of the adhesive material. And a step of hermetically sealing the flat panel display device.