JPS63250047A - Electrode structure for display device - Google Patents

Abstract

PURPOSE:To apply the same potential as a metal back to all bar-shaped support means and display a high-quality image by using a conductive material for the bar-shaped support means fixing material and connecting the conductive materials with a conductive substance. CONSTITUTION:A support wall 14 is located between a mount plate 13 and a metal back 3, support means 20 made of a conductive material are brought into contact with the metal back 3 at one end and are integrated with the support wall 14 and a fixing plate 21 at the other end by a fixing agent 22. A conductive material 31 is used for the fixing agent 22, or a conductive substance 41 is used for part of the surface, thus the support means 20 are stuck and fixed, and simultaneously the support means 20 are made conductive with a metal film 24. The adjoining support means 20 are made conductive with each other by the metal film 24 via the fixing agent 22. The end section of the film 24 and the metal back end section 3a are made conductive by a conductive means 25, thereby all bar-shaped support means 20 can be kept at the same potential as the metal back 3.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electrode structure for a flat panel display device used in color televisions, computer terminal displays, and the like.

Conventional technology FIGS. 8(a) and 8(b) are disclosed in Japanese Patent Application No. 60-288477.
3A and 3B are a front view and a cross-sectional view of an electrode assembly used in a flat panel display device shown in the above issue, in which a metal back 72 is disposed on a phosphor layer 71.

One end of a rod-shaped support means 73 is integrally fixed to the end of the support wall 74. The other end of the rod-shaped support means 73 is in contact with the metal back, and is connected to the metal back 5.

By applying a potential to the hooks 72, each of the rod-shaped support means 73 can be maintained at the same potential as the metal back 72.

Problems to be Solved by the Invention In the conventional electrode structure described above, when the rod-shaped support means 73 sucks the metal back 72 as shown in FIG. 9, for example, the rod-shaped support means 73 and the metal back 72 lose contact continuity. , both potentials are not equal. As a result, the rod-shaped support means 73 tends to be charged, and as a result, the potential of the rod-shaped support means 73 fluctuates and the trajectory of the electron beam changes, causing problems such as color shift and image disturbance.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to stably and reliably apply the same potential as the metal back to all rod-shaped supporting means with a simple structure.

Means for Solving the Problems The technical means of the present invention for solving the above problems are as follows.

(1) In the fixing material and the fixing plate, which are the means for fixing the rod-shaped support means and the support wall, conductive particle material is provided on the surface or inside of the fixing material, and the joint surface of the fixing plate with the fixing material is electrically conductive. By providing a conductive means between the metal back and the fixing plate, all the rod-shaped supporting means are given the same potential as the metal back.

(2) By arranging a conductive material at the end of the support wall to establish electrical conduction with the end of the support means, and by providing conductive means between the metal back and the conductive material, all rod-shaped support means are provided with a metal back. Gives the same potential as.

(3) By making the fixing material electrically conductive, making all of the rod-shaped support means arranged in large numbers conductive through the fixing material, and providing conduction means between the fixing material and the metal back, all the rod-shaped supports can be electrically conductive. Give the means the same potential as the metal back.

Function The present invention uses a conductive material for the rod-shaped support means fixing material, and connects the conductive materials used for each rod-shaped support means fixation material with a conductive substance to apply a potential to all the rod-shaped support means. , the same potential as that of the metal back can be applied to all the rod-shaped support means regardless of whether there is electrical conduction between the rod-shaped support means and the metal back.

EXAMPLES Examples of the present invention will be described below with reference to FIGS. 1 to 7.

FIG. 3 is a sectional view of the flat panel display device of the present invention. 1 is a face plate with a fluorescent layer on the inside 2° metal back 3
has. Reference numeral 4 denotes a rear plate which is spaced apart from the face plate 1 by a predetermined distance and is provided substantially parallel to the face plate 1. Reference numeral 26 denotes a side plate forming an envelope, which includes a face plate 1 and a back plate 2, and maintains a vacuum inside. Reference numeral 5 denotes a bank electrode, which is formed on the surface opposite to the back plate 2. 6 is a linear cathode extending in a direction perpendicular to the paper surface. Reference numerals 7, 8, and 9 denote a group of modulation and deflection electrodes, which have holes formed at locations through which the electron beam passes, and modulate and deflect the electron beam emitted from the linear cathode 6.

10, 11, and 12 are spacers for insulating each electrode. The spacer 10°11.12 has a shape extending in a direction perpendicular to the plane of the paper. 13 is a mounting plate with supporting wall 14 and electrode 9
The length of the support wall 14 is approximately the same as that of the support wall 14.

1 and 2 are a cross-sectional view and a simplified perspective view, respectively, of an electrode assembly. The support wall 14 is made of an insulating member such as glass, is located between the mounting plate 13 and the metal back 3, and extends in a direction perpendicular to the plane of the paper. Further, the support wall 14 faces the face plate 1 at a substantially right angle, and
Each is spaced apart and arranged in parallel. 15.16 is a horizontal deflection electrode, and metal is vapor-deposited and sputtered on both sides of the support wall 140.

It is formed by CVD, plating, etc. 17 is also a horizontal deflection electrode made of an insulating material having an expansion coefficient similar to that of the support wall 14, and has a thin metal film formed on its surface. The electrode 17 is spaced a predetermined distance from the support 4 by a spacer 18, and the electrodes 16 and 16 spatially overlap. The spacer 18 is made of an insulating material such as glass fiber, and the adhesive 19 is made of a low melting point solder glass or the like.
So spacer 9h; - spacer 18 and electrode 17. The support wall 14 is joined to the supporting wall 14. The fixed plate 21 is made of an insulating material having a coefficient of thermal expansion comparable to that of the support wall 14, and metal films 23 and 24 are formed on the front and back surfaces. Reference numeral 20 denotes a support means made of a conductive material, which has a coefficient of thermal expansion similar to that of the support wall 14. One end is tapered and contacts the metal back, and the other end is secured to the support wall 14 and the fixed plate by a fixing material 22. It is fixed integrally with 21.

The fixing material 22 is made of a conductive material 31 as shown in FIG. 4, and a part of the surface is made of a conductive material 41 as shown in FIG.
By doing so, the supporting means 20 is adhesively fixed, and at the same time, electrical continuity is obtained between the supporting means 2o and the metal film 24. The supporting means 2o adjacent to each other are electrically connected to each other through the metal film 24 via the fixing material 22. Therefore, by making the end of the metal film 24 and the end 3a of the metal back electrically conductive by the conduction means 25, all the rod-shaped supporting means can be maintained at the same potential as the metal back.

As the conductive material of the fixing material 22, for example, a firing paste made of a conductive filler such as silver or carbon and glass frit is used.

Examples of methods for making part of the surface a conductive material include coating the surface with carbon, aqua duck, etc.

Figures 6 to 7 show other embodiments of support means interconnection.

FIG. 6 shows a conductive material 52 extending over the entire edge of the support wall 51.
In this example, the support means 54 is electrically connected to the end of each support means 54. By making the end of the conductive material 52 and the end 3a of the metal back electrically conductive by the conduction means 53, the entire rod-shaped support means 54 can be maintained at the same potential as the metal back. The conductive material 62 is, for example, a metal film.

Use silver paste, aqua duck, etc.

FIG. 7 shows a structure in which a conductive fixing material 62 is used to fix the support means 61, and a similar conductive fixing material 63 is disposed between the conductive fixing materials to obtain electrical continuity between the rod-shaped support means. It is. By connecting the end of the conductive fixing material and the end 38L of the metal back to the conductor 11 by means of the reverse means 64, the entire rod-shaped support means 61 can be maintained at the same potential as the metal back.

Effects of the Invention As described above, the present invention makes it possible to stably and reliably apply the same potential as the metal back to all rod-shaped support means, regardless of whether there is electrical continuity between the electrode structure support means and the metal back. As a result, the potential of the rod-shaped support means does not fluctuate, and therefore the trajectory of the electron beam is stabilized, making it possible to display high-quality images without color shift or image disturbance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an electrode assembly of a display device according to an embodiment of the present invention, FIG. 2 is a perspective view of the electrode assembly, FIG. 3 is a sectional view of the display device, and FIG. 4 is a sectional view of essential parts. Figure 5 is a perspective view, Figures 6 and 7 are sectional views of main parts of other embodiments, and Figure 8 is a perspective view.
The figure is a sectional view of a main part of a conventional electrode structure, and FIG. 9 is an enlarged sectional view of the conventional example. DESCRIPTION OF SYMBOLS 1... Face plate, 2... Fluorescent layer, 3... Metal back, 14... Support wall, 20... Rod-shaped support means, 21...Fixing plate, 22...Fixing material, 24...Metal film. Name of agent: Patent attorney Toshio Nakao
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Claims (5)

[Claims] (1) A face plate whose inner surface is coated with a phosphor and further has a metal back; a back plate that is spaced apart from and substantially parallel to the face plate; and the face plate and the back plate. an envelope surrounding the interior thereof, an electron beam generating means, and a plurality of supporting walls located between the face plate and the back plate, which also serve as part of the electrodes and are arranged substantially perpendicularly to the face plate and parallel to each other. on the face plate side of the supporting wall, one of which abuts the face plate, and the other is integrally fixed to the end of the supporting wall with a fixing material and a fixing plate, and has a predetermined length. A display device in which a supporting means is formed at a predetermined interval between the supporting wall and the face plate, wherein a conductive particle material is provided on the surface of or inside the fixing material, and the fixing material is combined with the fixing material of the fixing plate. 1. An electrode assembly for a display device, characterized in that a bonding surface of the electrode is a conductive surface, and a conduction means between a metal back and the fixing plate is provided. (2) An electrode structure for a display device according to claim 1, characterized in that carbon is used as the conductive particle material. (3) An electrode structure for a display device according to claim 1, characterized in that silver is used as the conductive particle material. (4) a face plate whose inner surface is coated with a phosphor and further has a metal back; a back plate which is spaced apart from and substantially parallel to the face plate; and the face plate and the back plate. an envelope surrounding the interior thereof, an electron beam generating means, and a plurality of supporting walls located between the face plate and the back plate, which also serve as part of the electrodes and are arranged substantially perpendicularly to the face plate and parallel to each other. on the face plate side of the supporting wall, one of which abuts the face plate, and the other is integrally fixed to the end of the supporting wall with a fixing material and a fixing plate, and has a predetermined length. A display device in which a support means is formed at a predetermined interval between the support wall and the face plate, wherein a conductive material is disposed at an end of the support wall to establish electrical conduction with the end of the support means. An electrode structure for a display device, further comprising a metal back and a means for connecting the conductive substance to the metal back. (5) a face plate whose inner surface is coated with a phosphor and further has a metal back; a back plate which is spaced apart from and substantially parallel to the face plate; and the face plate and the back plate. an envelope surrounding the interior thereof; an electron beam generating means; and a plurality of supporting walls located between the face plate and the back plate, which also serve as part of the electrodes and are arranged substantially perpendicularly to the face plate and parallel to each other. a conductive rod-shaped support having a predetermined length, one side of which is in contact with the face plate on the face plate side of the support wall, and the other is integrally fixed to the end of the support wall with a fixing material and a fixing plate; A display device in which means are formed at a predetermined interval between the supporting wall and the face plate, the fixing material being electrically conductive, and all of the rod-shaped supporting means disposed in large numbers being electrically connected by the fixing material. What is claimed is: 1. An electrode structure for a display device, characterized in that the electrode structure includes a conductive means between a fixing material and a metal back.