JPH0668819A - Flat display apparatus - Google Patents

Abstract

PURPOSE:To obtain a flat display panel with high reliability capable of supporting an electrode structure easily and strongly in high accuracy. CONSTITUTION:A fixing body 6 is formed of material having thermal expansion coefficient substantially the same at that of a face glass 1 and joined by low- melting point glass 7 to a predetermined position of the face glass 1. A joint member 9 is mounted in a predetermined position by a screw 8 and an electrode structure 5 and the joint member 9 are mounted to each other by a screw 10. Since the electrode structure 5 is held via the joint member 9 having a flexible part 9a, no stress is, generated at the mounting part of the fixing body 6 due to elastic deformation of the flexible part 9a even if the thermal deformation is generated in the electrode structure during heating process in manufacturing stage.

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 using an electron beam.

[0002]

2. Description of the Related Art An example of the above flat panel display device will be described below with reference to the drawings.

FIG. 5 is a sectional perspective view of the flat panel display device disclosed in Japanese Patent Laid-Open No. 3-216939. Figure 5
In the figure, 51 is an electrode structure, 52 is a fixing metal fitting as a means for fixing the electrode structure 51, 53 is a metal back container, 54
Is a glass front container, and 55 is a display screen portion formed on the back surface of the front container 54. In the conventional example, a phosphor that emits an electron beam is used as the display screen 55.

FIG. 6 is an enlarged cross-sectional view of the fixed portion. In FIG. 6, reference numeral 51 is an electrode structure, 52 is a metal fixture for fixing the electrode structure 51, 53 is a metal back container, 56 is a screw, 57 is a washer, and 58 is a nut.

As described above, in the conventional flat type display device, the screw 56 and the nut 58 are directly provided between the electrode assembly 51 and the means 52a to 52c for fixing the electrode assembly 51 in the container.
It was fixed by a method such as welding.

[0006]

However, in the case of the flat panel display device having the above structure, the following problems remain. That is, (1) the work of attaching the electrode structure to the fixed body with high precision is complicated. (2) Furthermore, as a measure against (1), when the electrode structure is attached by welding means such as spot welding or laser welding, the welding strength is low. (3) Due to the difference in thermal expansion between the electrode structure and the face glass in the thermal process in the manufacturing process, cracks or peeling occur in the low melting point glass for adhering the fixed body. (4) When the flat panel display device is large and the electrode structure is large, the electrode structure is thermally deformed by the heat generated during the electron beam generation as well as the thermal process in the manufacturing process, and stress is applied to the fixed body mounting portion. concentrate.

Due to the causes (2) to (4), there is a problem in reliability in a portion where the electrode assembly is attached to the fixed body or a portion where the fixed body is attached to the vacuum container. In some cases, it was not possible to maintain the strength that can withstand various reliability tests. In particular, cracks generated in the low-melting-point glass may reach not only the low-melting-point glass but also the face glass, leading to destruction of the vacuum container.

Therefore, problems remain not only in the reliability of the method of holding the electrode structure but also in the reliability of the flat panel display device.

In view of the above problems, it is an object of the present invention to provide a highly reliable flat panel display device capable of easily, highly accurately and strongly holding an electrode structure.

[0010]

Means for solving the above problems are as follows. That is, (1) a flat panel display in which an electrode assembly is held by a fixed body attached to the face glass or the back container inside a vacuum container composed of a face glass having a phosphor screen and a back container facing the face glass. In the device, the electrode structure is configured to be held on the fixed body via a joining member having a flexible portion.

Alternatively, (2) an electrode assembly is held by a fixed body attached to the face glass or the back container inside a vacuum container comprising a face glass having a fluorescent screen and a back container facing the face glass. In the flat panel display device, the electrode structure is provided with a flexible portion in a part of the electrode structure and is held by the fixed body.

Alternatively, (3) an electrode assembly is held inside a vacuum container composed of a face glass having a fluorescent screen and a back container facing the face glass by a fixed body attached to the face glass or the back container. In the flat panel display device, the electrode structure is configured to be held on the fixed body via a joining member that is deformable according to a predetermined temperature.

Alternatively, (4) an electrode assembly is held inside a vacuum container composed of a face glass having a fluorescent screen and a back container facing the face glass by a fixed body attached to the face glass or the back container. A flat panel display device, wherein the electrode structure is held on a fixed body via a joining member, and the fixing member and the joining member are fixed by welding means such as an energy beam, the joining member and the fixing body. And are fitted to each other, and the fitting portion is welded.

[0014]

The operation of each of the above means (1) to (4) is as follows. That is, according to the above-mentioned means (1), even if the electrode structure is thermally deformed in the thermal process in the manufacturing process, the electrode structure is held through the joining member having the flexible portion. By the elastic deformation of the flexible portion, no stress is generated in the mounting portion of the fixed body.

According to the above-mentioned means (2), even if the electrode structure is thermally deformed in the thermal process in the manufacturing process, the flexible part is provided in a part of the electrode structure. Due to the elastic deformation, no stress is generated in the mounting portion of the fixed body.

According to the above-mentioned means (3), in the case where the flat panel display device is large in size and the electrode structure is large in the heat process in the manufacturing process, even if the electrode structure is largely thermally deformed, the electrode structure has a predetermined size. Since the joint member is held via the joint member which can be deformed depending on the temperature, the joint member is elastically deformed according to the thermal deformation of the electrode structure, so that no stress is generated in the mounting portion of the fixed body.

According to the above-mentioned means (4), the fixed body and the joining member are accurately positioned, and then fixed by welding means such as an energy beam, so that they can be directly screw-fixed while positioning as in the conventional case. There is no complexity. Also,
Since the joining member and the fixed body are fitted to each other to be in close contact with each other, it is possible to obtain a high-strength welded portion without using a complicated jig. Therefore, the electrode structure can be attached to the fixed body easily, highly accurately, and with high strength.

With the above operation, it is possible to easily obtain a highly reliable flat panel display device capable of holding the electrode structure with high precision and high strength.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 is an enlarged cross-sectional view of an electrode structure mounting portion of a flat panel display device according to a first embodiment of the present invention. In FIG. 1, 1 is a face glass, 2 is a fluorescent surface formed on the face glass 1, 3 is a rear container, 4 is a low-melting glass for sealing the rear container 3 and the face glass 1, and 5 is an electrode assembly. , 6 are electrode structures 5
Is a low melting point glass for adhering the fixed body 6 to the face glass 1, 8 is a screw for attaching the electrode assembly 5 to the fixed body 6, 9 is a joining member. Is a screw for attaching the joining member 9 to the electrode assembly 5.

The fixed body 6 is made of a material having a coefficient of thermal expansion substantially the same as that of the face glass 1, for example, 42-6 alloy (42% N).
i, 6% Cr, balance Fe) is used to bond the face glass 1 at a predetermined position by the low-melting glass 7. Then, the joining member 9 is attached to a predetermined position with the screw 8, and the electrode assembly 5 and the joining member 9 are attached with the screw 10. At this time, the joining member 9 is provided with a flexible portion 9a that is elastically deformable in a direction in which the electrode structure 5 is thermally deformed, and a material having a thermal expansion coefficient close to that of the electrode structure 5 is desirable.

Here, the point that is greatly different from the conventional example is that the electrode assembly 5 is held on the fixed body 6 through the joining member 9 having the flexible portion 9a, and the electrode assembly 5 is attached to the electrode assembly 5 by the thermal process in the manufacturing process. Even if thermal deformation occurs, no stress is generated in the attachment portion of the fixed body 6 due to elastic deformation of the flexible portion 9a.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is an enlarged cross-sectional view of the electrode structure mounting portion of the flat panel display device according to the second embodiment of the present invention.

The present embodiment is different from the first embodiment or the conventional example in that the electrode assembly 5 is provided with the flexible portion 5a without using the joining member 9, and the electrode assembly 5 is directly attached to the fixed body 6. It is applied when there is no problem in the position accuracy even if it is held.

(Embodiment 3) Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 3 is an enlarged cross-sectional view of the electrode structure attachment portion of the flat panel display device according to the third embodiment of the present invention.

The present embodiment is different from the first embodiment or the conventional example in that the joining member 9 is made of a material that can be deformed according to a predetermined temperature. In consideration of the above, a shape memory alloy that deforms to the same degree as the electrode structure 5 at around 450 ° C. may be used.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 4 is an enlarged cross-sectional view of the electrode structure attachment portion of the flat panel display device according to the fourth embodiment of the present invention.

First, a fixed body 6 made of a material having a thermal expansion coefficient substantially the same as that of the face glass 1 is bonded to a predetermined position of the face glass 1 with a low melting point glass 7. After that, the concave portion 9b provided on the joining member 9 and the convex portion 6a provided on the fixed body 6 are fitted to each other, and the fitting portion is laser-welded. Further, the electrode structure 5 and the joining member 9 are attached with screws 10.
At this time, the joint member 9 is provided with a flexible portion 9a that is elastically deformable in a direction in which the electrode structure 5 is thermally deformed, and the electrode structure 5 is provided.
A material having a coefficient of thermal expansion close to is desirable.

Here, a big difference from the conventional example is that when the electrode assembly 5 is attached to the fixed body 6 via the joining member 9, the concave portion 9b of the joining member 9 and the convex portion 6a of the fixed body 6 are fitted to each other. Laser welding. That is, by fitting the portions to be laser-welded to each other, it is possible to easily bring them into close contact with each other without using a complicated jig, and it is possible to obtain a laser-welded portion having high strength.

[0031]

As described above, in the flat panel display device according to the present invention, (1) even if the electrode structure is thermally deformed by the thermal process in the manufacturing process, the electrode structure is provided with the joining member having the flexible portion. Since it is held via the elastic member, the flexible portion is elastically deformed, so that no stress is generated in the mounting portion of the fixed body.

(2) Even if the electrode structure is thermally deformed by the thermal process in the manufacturing process, since the flexible part is provided in a part of the electrode structure, the flexible part is elastically deformed and fixed. No stress is generated on the attachment part of the body.

(3) When the flat panel display device is large and the electrode structure is large due to the thermal process in the manufacturing process, even if the electrode structure is largely deformed by heat, the electrode structure can be deformed according to a predetermined temperature. Since it is held via the joining member,
Since the joining member elastically deforms in accordance with the thermal deformation of the electrode structure, no stress is generated in the mounting portion of the fixed body.

(4) Since the fixing body and the joining member are accurately positioned and then fixed by welding means such as an energy beam, there is no need for the conventional method of positioning and screwing directly. Further, since the joining member and the fixed body are fitted to each other to be in close contact with each other, it is possible to obtain a high-strength welded portion without using a complicated jig. Therefore, the electrode structure can be attached to the fixed body easily, highly accurately, and with high strength.

Therefore, it is possible to easily obtain a highly reliable flat panel display device capable of holding the electrode structure with high precision and high strength, and therefore the industrial value is extremely large.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an essential part showing a configuration of a flat panel display device according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of an essential part showing the configuration of a second embodiment device of the present invention.

FIG. 3 is an enlarged cross-sectional view of an essential part showing the configuration of an apparatus according to a third embodiment of the present invention.

FIG. 4 is an enlarged cross-sectional view of a main part showing the configuration of a device according to a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional perspective view showing the configuration of a conventional flat panel display device.

FIG. 6 is a partially enlarged sectional view of the conventional device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Face glass 2 Fluorescent surface 3 Back container 4 Low melting point glass 5 Electrode structure 5a Flexible part 6 Fixed body 6a Convex part 7 Low melting point glass 8 Fastening screw 9 Joining member 9a Flexible part 9b Recess 10 Fastening screw

Claims (4)

[Claims] 1. A flat panel display in which an electrode assembly is held by a fixed body attached to the face glass or the back container inside a vacuum container composed of a face glass having a fluorescent screen and a back container facing the face glass. The flat panel display device is characterized in that the electrode structure is held on the fixed body through a joining member having a flexible portion. 2. A flat panel display in which an electrode assembly is held by a fixed body attached to the face glass or the back container inside a vacuum container composed of a face glass having a phosphor screen and a back container facing the face glass. The flat panel display device is characterized in that the electrode structure is provided with a flexible portion in a part of the electrode structure and is held by the fixed body. 3. A flat panel display in which an electrode assembly is held by a fixed body attached to the face glass or the back container inside a vacuum container composed of a face glass having a phosphor screen and a back container facing the face glass. The flat panel display device is characterized in that the electrode structure is held on the fixed body through a joining member which is deformable according to a predetermined temperature. 4. A flat panel display in which an electrode structure is held by a fixed body attached to the face glass or the back container inside a vacuum container composed of a face glass having a phosphor screen and a back container facing the face glass. In the device, the electrode structure is held on the fixed body via a joining member, and when the fixing body and the joining member are fixed by welding means such as an energy beam, the joining member and the fixing body are A flat panel display device characterized in that they are fitted together and the fitting portion is welded.