JPH05190121A - Vacuum container for image display device and manufacture thereof - Google Patents

Abstract

PURPOSE:To reduce the number of manufacturing processes and provide a vacuum device having high quality, in an image display device such as the terminal display for a TV receiver, computer, etc. CONSTITUTION:A back surface container 53 is installed on a face panel 51 having a fluorescent display part 52 so as to surround an electrode structure body 55. The vicinity of the edge part 54 of the back surface container 53 is locally heat-treated, and then embedded, and the face panel 51 and the back surface container 53 are sealing joined, and the high temperature baking process of the whole vacuum container is made unreliable, and the strength of a joint member is improved, and stabilization is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum container of a flat panel image display device used for a television receiver, a terminal display of a computer and the like.

[0002]

2. Description of the Related Art In recent years, the face panel of a CRT tends to have a flat face, and the vacuum container of a flat panel image display device has also been made thinner, so that the number of flat parts is increasing. Although a glass material is used as a constituent material of these face panels and vacuum containers, it is necessary to increase the thickness of the glass material in order to ensure the vacuum resistance strength, and there is a problem in weight reduction.

In order to solve this problem, the applicant of the present application disclosed in Japanese Patent Application Laid-Open No. 60-100344 that a metal having a larger allowable stress than glass is used as a constituent material of a vacuum container in a flat panel image display device. There is.

The structure will be described below with reference to FIG. FIG. 5 shows a cross section of a vacuum container of a conventional flat panel image display device using a metal for a back container. In the figure, 1 is a face panel made of glass, 2 is a fluorescent display part, 3 is a low-melting glass frit, 4 is a back container, and an iron-nickel alloy having a thermal expansion coefficient almost equal to that of the face panel 1 is molded. Reference numeral 5 denotes an electrode structure in which an electron emission source and a planar electrode are arranged.

With such a structure, the face panel,
It is possible to reduce the weight as compared with a vacuum container in which both the back container is made of a glass material.

[0006]

However, in the above-mentioned structure, since the low melting point glass frit is used for joining the back container and the face panel, it is necessary to always burn the entire container in a high temperature furnace, which is troublesome. Due to this, there was a problem of lowering work efficiency. In addition, the strength of the low-melting glass frit is comparatively small among the constituent materials, so that the overall strength is restricted by the low-melting glass frit, and the strength varies depending on the molten state of the low-melting glass frit, and the quality is not stable. Had.

In view of the above problems, it is an object of the present invention to improve the work efficiency by eliminating the firing process in a furnace and to provide a vacuum container for a high quality image display device.

[0008]

In order to solve the above problems, a vacuum container of an image display device of the present invention is made of a metal that surrounds a face panel for displaying an image and an electrode structure attached to the face panel. It is composed of a back container, and the back container and the face panel are sealed and joined by embedding an end portion of the back container in the face panel.

Further, in the method of manufacturing a vacuum container according to the present invention, the face panel and the rear container are brought into close proximity to each other and aligned, and the end portion of the rear container is heated and buried.

Further, it comprises a face panel for displaying an image and a metal back container surrounding the electrode structure attached to the face panel, and the face panel and the back face via a metal joining member embedded in the face panel. Seal and join the container.

Further, the face panel and the joining member are positioned close to each other, the ends of the joining member are heated and buried, and then the electrode structure is attached to the face panel to seal the back container and the joining member. Stop joining.

[0012]

As described above, by embedding the end portion of the metal back container in the face panel and sealingly bonding the back container and the face panel, the high temperature firing process by using the furnace is not necessary, and the bonding is performed. It is possible to stabilize the strength. Further, when the back container and the face panel are joined via the joining member, the joining member is embedded in the face panel before the electrode structure is attached to the face panel, so high temperature damage to the electrode structure due to heat treatment can be prevented. ..

[0013]

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

FIG. 1 shows a cross section of a vacuum container of an image display device according to an embodiment of the present invention. Reference numeral 51 is a glass face panel, 52 is a fluorescent display portion, 53 is a metal back container, 54 is an end portion of the back container 53, and 55 is an electrode structure in which an electron emission source and a planar electrode are arranged. is there.

A method of manufacturing the above structure will be described. Attach the electrode structure 55 to the face panel 51,
The back container 53 and the face panel 51 are brought into close proximity with each other so as to surround the electrode structure 55 and aligned, and the vicinity of the end 54 is subjected to high frequency heating (not shown) using a coil. At this time, in order not to make a difference in thermal expansion between the face panel 51 and the end portion 54, the end portion 54 is heated so that a part of the face panel 51 adjacent to the end portion 54 is also heated to a high temperature. When the face panel 51 is slightly melted, the end portion 54 is embedded in the face panel 51. Then, the internal space formed by the face panel 51 and the back container 53 is evacuated to obtain a vacuum container. The face panel 51 may be heated by a burner, a coil, or the like separately from the heating of the end portion 54.

As described above, according to the present invention, the face panel 5 is used.
1 and the back container 53 are directly sealed and joined by locally heating the end 54 of the back container 53 and embedding it in the face panel 51, so that a high temperature firing process using a furnace is not required unlike the conventional case. .. Further, in the past, the solubility of the low melting point glass frit was different for each individual device and it was difficult to make the quality constant.However, in the present invention, since the end of the back container is embedded in the face panel, it is not affected by the solubility. The quality can be kept stable. Further, the direct embedding allows stronger bonding than the bonding through the low-melting-point glass frit, and the quality is improved.

A second embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a sectional view of a vacuum container of an image display device showing a second embodiment of the present invention. In the figure, the same components as those of the previous embodiment are designated by the same reference numerals and the description thereof will be omitted. The difference between this embodiment and the previous embodiment is that the back container is composed of a pressure resistant container 56 and a thin container 57.

A method of manufacturing the above structure will be described. The electrode structure 55 is attached to the face panel 51,
Positioning is performed so as to surround the electrode structure 55. Then, a thin container 57 is arranged outside the pressure container 56,
The face panel 51 and the thin-walled container 57 are brought into close proximity to each other for alignment, and the vicinity of the end 58 of the thin-walled container 57 is subjected to high frequency heating, and then the end 58 of the face panel 51 in a slightly melted state.
To bury. After that, the inside of the pressure resistant container 56 is evacuated to obtain a vacuum container.

In this embodiment, in addition to the effect obtained in the previous embodiment, by using a thin container as the back container, the thickness of the container can be made thinner and the rigidity becomes smaller than when the container is thick. The thermal stress caused by the above can be reduced, and cracks are less likely to occur on the face panel.

A third embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows a cross section of a vacuum container of an image display device according to a third embodiment of the present invention.

Also in the figure, the same components as those of the first embodiment are designated by the same reference numerals and described. The present embodiment is different from the first embodiment in that the back container 59 and the face panel 51 are joined via a joining member 60. Here, 61 is a contact point between the back container 59 and the joining member 60, and 62 is an end portion of the joining member 60. The manufacturing method of the above structure will be described below.
And the joining member 60 are brought close to each other for alignment. Then, the end portion of the joining member 60 is locally heated by high-frequency heating, and the end portion 62 of the joining member 60 is embedded in the face panel 51 in a slightly melted state.
To join. After that, the electrode structure 55 is attached to the face panel 51, the face panel 51 and the back container 59 are aligned so as to surround the electrode structure 55, and the contact point 61 between the joint portion 60 and the back container 59 is laser-welded or the like. Seal and join. Then, the internal space formed by the face panel 51 and the back container 59 is evacuated to obtain a vacuum container.

As described above, in this embodiment, in addition to the effects obtained in the first embodiment, the joining member 60 and the back container 59 are sealed and joined by laser welding or the like, so that a high temperature firing process is not necessary, and the joining member is also provided. Since the bonding of 60 and the back container 59 is performed before the fluorescent display 52 and the electrode structure 2 are attached, the effect that the damage to the electrode structure and the like is slight is obtained.

In this embodiment, both the fluorescent display portion and the electrode structure were formed after the back container was joined, but the invention is not limited to this. For example, for the fluorescent display portion, before the face panel is joined. It may be formed.

A fourth embodiment of the present invention will be described below with reference to the drawings. FIG. 4 shows a cross section of a vacuum container of an image display device according to a fourth embodiment of the present invention. In this embodiment, the back container and the face panel are joined by the joining member 64.
The third embodiment is similar to the third embodiment except that the back container is composed of the pressure resistant container 56 and the thin container 63. Here, 65 is a contact point between the joining member 64 and the pressure resistant container 63, and 66 is an end portion of the joining member 64.

In this embodiment, in addition to the effects of the third embodiment,
By using a thin container as the back container, it is possible to reduce the wall thickness, and since the rigidity becomes smaller than that when the container is thick, cracking of the face panel due to thermal stress at the time of joining is less likely to occur.

[0026]

As described above, according to the vacuum container of the image display device of the present invention and the method for manufacturing the same, the end portion of the enclosing means or the end portion of the joining member joined to the enclosing means is embedded in the face panel by local heating. Since the joining is performed, the conventional furnace process is unnecessary, and the low-melting-point glass frit is not used. Therefore, the strength of the joined portion can be improved and the quality can be stabilized.

By using a thin container and a pressure resistant container as the back container, it is possible to prevent the face panel from cracking due to the influence of thermal stress during heating.

Further, when the face panel and the back container are joined via the joining member, the face panel and the joining member are joined before the electrode structure is attached, so that damage to the electrode structure can be reduced. ..

[Brief description of drawings]

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

FIG. 2 is a sectional view of a vacuum container of an image display device according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a vacuum container of an image display device according to a third embodiment of the present invention.

FIG. 4 is a sectional view of a vacuum container of an image display device according to a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view of a vacuum container of a conventional image display device.

[Explanation of symbols]

 51 Face Panel 52 Fluorescent Display 53, 59 Back Container 55 Electrode Structure 56 Pressure Resistant Container 57, 63 Thin Wall Container

Claims (6)

[Claims] 1. A face panel for displaying an image, and a metal back container surrounding an electrode structure attached to the face panel and sealingly joined by embedding an end portion in the face panel. A vacuum container for an image display device characterized by the above. 2. A face panel for displaying an image, a metal joining member whose ends are embedded and joined to the face panel, and an electrode structure attached to the face panel are surrounded by the joining member. A vacuum container for an image display device, comprising: a metal back container that is sealingly joined to the face panel. 3. The vacuum container for an image display device according to claim 1, wherein the back container comprises a pressure-resistant container and a thin container, and an end portion of the thin container is embedded in a face panel. 4. The back container comprises a pressure resistant container and a thin container, and the end of the thin container is sealed and joined to a joining member.
A vacuum container for the image display device described. 5. A step of attaching an electrode structure band to a face panel, a step of bringing the face panel and a back container into close proximity to each other, a step of heating an end portion of the back container, and an end of the back container. A method of manufacturing a vacuum container for an image display device, comprising: a step of burying a portion in the face panel; and a step of evacuating an internal space formed by the face panel and a back container. 6. A step of aligning a face panel and a joining member, a step of heating an end portion of the joining member, a step of embedding the joining member in the face panel, and an electrode structure strip on the face panel. Attaching the face panel and the back container in close proximity to each other, joining the joining member and the back container, and evacuating the internal space formed by the face panel and the back container to a vacuum. And a method for manufacturing a vacuum container of an image display device.