JP2558993B2 - Image display device and method of manufacturing image display device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel image display device using an electron beam.

[0002]

2. Description of the Related Art An example of the configuration of a conventional image display device will be described below with reference to the drawings.

FIG. 9 shows a cross section of a main part of a first example of a conventional electrode unit. Further, FIG. 10 shows a perspective view of a main part of an example of a conventional electrode unit. In addition, FIG. 11 shows a cross-sectional view of a main part of an example of an image display device using a conventional electrode unit.
Reference numeral 101 denotes a face plate which also serves as a front container having an inner surface coated with a phosphor screen 103 made of R, G, B.
A back container 102 has a back electrode 104 formed of a conductive film on its inner surface. Reference numeral 105 is a linear cathode, 106 is an electrode unit formed by stacking electron beam control electrodes 106-a, b, c, ... (In this conventional example, up to e is shown), and the electron beam generated from the linear cathode 105 is While passing through the electron beam passage holes 106-a-1, 106-b-1, ... Formed in the electron beam control electrodes 106-a, b, c ,. After that, the R, G, and B phosphors collide with the screen 103 and emit light to display an image.

Here, as a mutual laminating / fixing method of the electron beam control electrodes 106-a, b, c, ... Of the electrode unit 106, as shown in FIG. 12, a glass rod 110 is used as a core wire and around it. The frit glass 111 coated (FIG. 12a) is arranged between the electron beam passage holes 106-a-1 and 106-b-1 (FIG. 12b), and the frit is melted by pressure and temperature rise to bond. (Fig. 12
c). Here, the electron beam control electrodes 106-a, b,
c, ... The mutual distance is kept at the diameter of the glass rod 110.

The electrode unit 106 manufactured as described above is supported and fixed at the peripheral portion by the post 108 which is adhered and fixed to the back container 102 by the frit glass 107.

Further, FIG. 13 shows a sectional view of essential parts of a second example of a conventional electrode unit. Electron beam control electrode 106-
a, b, c, ... (In the conventional example, up to e is shown) The mutual lamination / fixing method is performed by the electron beam control electrodes 106-a, b,
c, ... Insulating ceramic spacers 120-a, b, c, d, and e, for example, are arranged to keep a space between them, and are fastened to the electron beam control electrode 106-e in that state. It is fastened by a pin 120. Specifically, the end of the fastening pin 121 is fastened by, for example, melting with a laser beam.

Here, the electron beam control electrodes 106-a,
b, c, ... Are planar and therefore the fastening pins 121
Are also two-dimensionally arranged at appropriate intervals. Then, the electron beam control electrodes 106-a, b, c, and
d and e are discretely stacked and fixed.

[0008]

However, the above method has the following problems.

First, in the first example, it is necessary to raise the temperature to the frit glass melting temperature in order to bond the electron beam control electrodes. Therefore, they are joined in a state of thermal expansion and then cooled down to room temperature, but "warping" often occurs in the process, and the resulting electrode unit is often greatly warped. It was Further, in the step of melting the frit, it is necessary to use an electric furnace whose temperature profile can be strictly controlled, which has been a main cause of problems such as increased cost and reduced throughput.

Further, in the second example, since the electron beam control electrode is fastened by the structure using the pins, there is no occurrence of "warpage" associated with thermal expansion as in the first example. However, in the case of this configuration, there is no member other than the fastening pin portion that regulates the stacking interval of the electron beam control electrodes 106-a, b, c, ... Was generated. Further, the rigidity of the structure of the electrode unit is considerably low, and as a result, it was not possible to install the electrode unit while maintaining its shape in the configuration of fixing only the periphery.

In view of the above problems, the present invention provides a structure and a method for stacking and fixing the electron beam control electrodes without problems such as "warping" and "waviness", and in a state where the rigidity of the structure is secured. The purpose is to

[0012]

In order to solve the above problems, the electron source of the present invention is as follows.

According to the first aspect of the present invention, at least a face plate having a phosphor screen formed thereon, an electrode unit in which a plurality of electron beam control electrodes having electron beam passage holes are laminated and fixed, an electron source, and an internal portion. In the flat panel image display device including a container for keeping the vacuum state, a laminated / fixed structure of the electron beam control electrodes in the electrode unit is as follows : Insulating spacers are formed and (N + 1) th
Anchor holes are formed in the electron beam control electrode of the Nth corresponding to the positions of the insulating spacers formed in the electron beam control electrode of the Nth sheet.
1) After stacking a first electron beam control electrode via the insulating spacer, a sprayed film covers the anchor hole.
And a structure formed so as to be fused with the insulating spacer.
The image display device is characterized by being manufactured.

The present invention according to claim 2 provides at least a face plate having a phosphor screen, and an electron beam.
Stack and fix multiple control electrodes and divide them at specified intervals
A flat plate type image display device including an electrode unit, an electron source, and a container that keeps a vacuum inside, an electrode unit that is arranged at a certain interval, an electron source, and a flat plate that includes a container that keeps a vacuum inside. Image display device, wherein the electrode unit
The laminated and fixed structure of the electron beam control electrode in DOO, at least in a substantially central portion of the N-th electron beam control electrode insulating spacer is formed on and the (N + 1) th electron beam control electrode Anchor holes are formed corresponding to the positions of the insulating spacers formed on the Nth electron beam control electrode, and the Nth and (N + 1) th holes are formed.
After stacking the first electron beam control electrode with the insulating spacers in between, spray the sprayed film to cover the anchor hole.
With a structure formed to fuse with the insulating spacer
The image display device is characterized by being present.

According to a fourth aspect of the present invention, at least the step of forming an insulating spacer between the electron beam passage holes of the N-th electron beam control electrode having the electron beam passage hole and the position of the insulating spacer. Stacking a (N + 1) th electron beam control electrode having a correspondingly formed anchor hole on the Nth electron beam control electrode via the insulating spacer; and covering the anchor hole with a sprayed film.
It is a method of manufacturing an image display device, including a step of manufacturing an electrode unit in which a plurality of electron beam control electrodes are laminated and fixed by a step of forming the insulating spacers by fusion .

According to a fifth aspect of the present invention, a step of forming an insulating spacer at least at a substantially central portion of the N-th electron beam control electrode and an anchor hole corresponding to a position of the insulating spacer are formed. and the (N + 1) a step of the electron beam control electrode through the insulating spacer laminated on the electron beam control electrode of the first N of said anchor the sprayed film
-To cover and cover the hole and fuse with the insulating spacer
And a step of forming an electrode module in which a plurality of electron beam control electrodes are stacked and fixed by a step of forming the electrode module and a step of disposing the electrode module at a predetermined interval. It is a manufacturing method.

[0017]

The function of this technical means is as follows.

The present invention according to claim 1 provides an electrode unit for driving an electron beam in a flat panel image display device.
For a structure in which a plurality of electron beam control electrodes are laminated and fixed, an N-th electron beam control electrode and (N + 1)
The electron beam control electrode electrode unit of the first sheet is (N +
1) A sprayed film is formed so as to cover and close the anchor hole of the first sheet, and the sprayed film is laminated and fixed by fusion with the insulating spacer formed on the electron beam control electrode of the Nth sheet through the anchor hole. And the sprayed film formed on the (N + 1) th electron beam control electrode at the same time is (N +
2) It serves as an insulating spacer for stacking and fixing the first electron beam control electrode. By repeating this structure, a plurality of electron beam control electrodes are laminated and fixed to form an electrode unit.

According to this structure, the sprayed film, which is a joining means of the electron beam control electrodes, can be formed at a temperature considerably lower than that of frit glass, and therefore, when the electron beam control electrodes are laminated and fixed. There is no problem such as deformation due to thermal expansion. At the same time, it can also be used as a reference plane for stacking and fixing the next electron beam control electrode, which is advantageous in terms of cost.

Further, by appropriately setting the joint area, that is, the size of the anchor hole, the rigidity as an appropriate structure can be secured.

The present invention according to claim 2 provides an electrode unit for driving an electron beam in a flat panel image display device,
Multiple electron beam control electrodes are stacked and fixed , and
This is a structure for a structure in which a plurality of divided electrode modules are arranged at predetermined intervals.

In addition to the action of the first aspect, in particular, in the case of a large screen, it is attempted to reduce the influence by making a module for the problematic electrode accuracy (initial processing accuracy and change with time in thermal deformation and equal diameter). It is a thing.

The invention of claim 4 is an electrode unit for a driving of the electron beam in the flat panel display device,
This is a manufacturing method for a structure in which a plurality of electron beam control electrodes are laminated and fixed. The N-th electron beam control electrode and the (N + 1) th electron beam control electrode electrode unit are formed by the sprayed film formed so as to cover and close the (N + 1) th anchor hole. By laminating and fixing by bonding to the insulating spacer formed on the electron beam control electrode, the sprayed film formed on the (N + 1) th electron beam control electrode is (N + 2) at the same time.
It serves as an insulating spacer for stacking and fixing the first electron beam control electrode. Then, by repeating this process, a plurality of electron beam control electrodes are laminated and fixed to form an electrode unit.

According to this method, the sprayed film, which is a joining means of the electron beam control electrodes, can be formed at a temperature considerably lower than that of frit glass, and therefore, when stacking and fixing the electron beam control electrodes, There is no problem such as deformation due to thermal expansion. At the same time, it is possible to form a reference surface for stacking and fixing the next electron beam control electrode,
It is also advantageous in terms of cost.

Further, by appropriately setting the joint area, that is, the size of the anchor hole, the rigidity as an appropriate structure can be secured.

The present invention according to claim 5 provides an electrode unit for driving an electron beam in a flat panel image display device.
Multiple electron beam control electrodes are stacked and fixed , and
A plurality of electrode modules split structure, its manufacturing method for those arranged structure at predetermined intervals.

The operation is the same as that of claim 4.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An image display device and a method of manufacturing the same according to one embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of the essential parts of an example of an electrode unit according to the first embodiment of the present invention. FIG. 2 is a perspective view of a main part of the electrode unit according to the first embodiment of the present invention during manufacture. FIG. 3 is a cross-sectional view of essential parts of an example of an image display device using an example of the electrode unit according to the first embodiment of the present invention. Reference numeral 1 denotes a face plate which also serves as a front container having a phosphor screen 3 made of R, G, B applied on its inner surface, and 2 a back electrode 4 made of a conductive film on its inner surface.
It is a back container formed with. Reference numeral 5 is a linear cathode, 6 is an electron beam control electrode 6-a, b, c ,.
In the electrode unit, the electron beam generated from the linear cathode 5 is an electron beam control electrode 6-.
Electron beam passage hole 6-a formed in a, b, c, ...
While passing through -1, 6-b-1, ..., Control of focusing, deflection, modulation, etc. is performed, and then the R, G, B phosphor screens 3 collide with and are issued to display an image. It is a thing.

The electrode unit 6 is supported and fixed at the peripheral portion by posts 8 which are adhered and fixed to the back container 2 with a frit glass 7.

Here, the structure and method for stacking and fixing the electron beam control electrodes 6-a, 6-b, 6-c, ... Of the electrode unit 6 to each other will be described.

First, the first electron beam control electrode 6-a
To the insulating film 10-a formed by some method between the electron beam passage holes 6-a-1 of FIG.
-B-2 formed second electron beam control electrode 6-b
Is laminated, a sprayed film 10-b is formed so as to cover and close the anchor hole 6-b-2, and the sprayed film 10-b is fused with the insulating film 10-a through the anchor hole 6-b-2. As a result, the first electron beam control electrode 6-a and the second electron beam control electrode 6-b are fixed. At the same time, the sprayed film 10-b is formed by stacking the third electron beam control electrode 6-c.
It serves as a fixed reference surface. Here, the insulating film 10-a
For the formation of
In addition, it does not cause complication, but is not particularly limited.

Electron beam control electrodes 6-c for the third and subsequent sheets,
d, e ... (In the present embodiment, up to 6-e is shown) As a structure for stacking and fixing and a manufacturing method, the above-described repetition may be performed.

According to this structure, the sprayed film, which is a joining means of the electron beam control electrodes, can be formed at a temperature considerably lower than that of frit glass, and therefore, when the electron beam control electrodes are laminated and fixed. There is no problem such as deformation due to thermal expansion. At the same time, it can be used also as a reference surface for stacking and fixing the next electron beam control electrode, which is advantageous in terms of man-hours and cost. Further, by appropriately setting the joint area, that is, the size of the anchor hole, appropriate rigidity as a structure can be secured. The shape of the anchor hole is not limited to the round hole shape shown in FIG. 2, and an appropriate shape such as a slit shape may be used. However, Te is set to its size <br/>, it is protrude from the insulating spacer as a laminated reference
No The reason is that it is difficult to form the sprayed coating so as to cover and close the anchor hole if the anchor hole is protruding from the insulating spacer that serves as the stacking standard, and the sprayed material may be formed between the electrodes during the sprayed film formation. This is because problems such as scattering may occur and the performance of the electrode unit may be impaired.

For the same reason as above, one of the methods for selectively forming the sprayed film only around the anchor hole when forming the sprayed film so as to cover the anchor hole is one of the surface roughness of the base. Anchor hole 6-b- which is desired to be formed as shown in FIG.
2, 6-c-2, ... Regions 6-a-3, 6-b-3, ... Roughened selectively are formed around the electron beam passage holes 6-a-1 ,. 6-b-1, ... Avoiding spraying to prevent sprayed particles from scattering between the stacked electron beam control electrodes, and at the same time form a sprayed film only on the roughened area around the holes. There is a method.

With this method, the apparatus is simple, but the accuracy of the sprayed coating may be slightly deteriorated.

Another method is to use a mask 20 as shown in FIG. According to this method, the shapes of the sprayed coatings 10-b, 10-c, ... Formed in the anchor holes 6-b-2, 6-c-2 ,. As a result, the electron beam control electrodes can be stacked with high accuracy.

It is desirable that the mask 20 can be reused many times, and for that purpose it is necessary that the sprayed film does not adhere to the mask itself. An example of such a mask is a mask whose surface is mirror-finished.

Further, the anchor holes 6-b-2, 6-c-
Of the sprayed coatings covering 2, 2, ..., the sprayed coating 10-e formed on the outermost side of the electrode unit 6 has an electron beam passage hole 6-a-1, when an insulator is used as the material.
Charge-up or the like may occur due to the influence of, for example, leaking electrons of the electron beam that has passed through 6-b-1, ..., 6-e-1, which may affect the electron beam trajectory. . In such a case, the sprayed film 10
A conductive material may be used as the material of -e. 10-e
The electron beam control electrodes 10-d and 10
The insulating property with respect to −e is structurally maintained.

Further, in order to further ensure the effect of solving the problems relating to thermal expansion in the present invention, the material of the electron beam control electrodes 6-a, b, c, ..., E is the Invar material which is a low thermal expansion metal material ( 36Ni alloy) and
As the thermal spraying film forming process, at least a process of thermal spraying while cooling the electron beam control electrode substrate which is intended to cover the anchor hole may be used.

According to this method, the thermal expansion of the electron beam control electrode can be minimized by the synergistic effect of using the material having a small thermal expansion coefficient and suppressing the temperature rise by cooling, and thus the thermal sprayed film can be formed. It is possible to more reliably prevent the warpage caused by the difference in thermal expansion between the joining step and the subsequent step. In particular, the Invar material exhibits low thermal expansion characteristics in the temperature range from room temperature to around 200 ° C. Therefore, as a measure of cooling, the substrate (electron beam control electrode which is trying to cover the anchor hole) is 200 It is desirable to keep the temperature below ℃.

Further, the spraying method around the anchor hole by the mask shown in FIG. 5 has the effect of blocking the radiant heat from the spraying torch at the same time, and is more effective in solving the problems relating to heat.

FIG. 6 is a sectional view of the essential parts of an example of an electrode module according to the second embodiment of the present invention. FIG. 7 is a cross-sectional view of the essential parts of an example of the electrode unit according to the second embodiment of the present invention. FIG. 8 is a sectional view of a main part of an image display device using an example of the electrode unit according to the second embodiment of the present invention. The components having the same operations as those in the first embodiment are designated by the same reference numerals.

In this structure, a plurality of electron beam control electrodes 6-a are used as the electrode unit 6 for driving the electron beam.
plurality b, c, a, ... electrode module 6 'of the stacked-fixed structure, in which is disposed at a predetermined interval P. The gap between the modules becomes the electron beam passage gap, and the same action as the electron beam passage hole in the first embodiment is performed.

By modularizing the electrode unit, it is intended to reduce the influence on the electrode accuracy (initial processing accuracy and change with time such as thermal deformation due to diameter change) which becomes a problem particularly in a large screen.

With this structure, the structure and manufacturing method of the electrode module, and the specific structure, shape and material of the insulating spacers, anchor holes and the like are the same as those in the first embodiment.

[0047]

As described above, according to the present invention, the sprayed film is used as a spacer for bonding the electron beam control electrodes and further for stacking the next electron beam control electrodes, which is considerably lower than frit glass. Since it can be formed at a temperature, there is no problem of deformation due to thermal expansion when stacking and fixing the electron beam control electrode.

In addition, the electrode unit thus joined can secure the rigidity as a structure.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an example of an electrode unit according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the example of the electrode unit according to the first embodiment of the present invention during manufacturing.

FIG. 3 is a sectional view of an essential part of an image display device using an example of an electrode unit according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of a main part of a first example of means for selectively forming a sprayed film only around an anchor hole.

FIG. 5 is a sectional view of an essential part of a second example of a means for selectively forming a sprayed film only around an anchor hole.

FIG. 6 is a cross-sectional view of an essential part of an electrode module according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view of an essential part of an electrode unit according to a second embodiment of the present invention.

FIG. 8 is a cross-sectional view of a main part of an image display device using an electrode unit according to a second embodiment of the present invention.

FIG. 9 is a cross-sectional view of essential parts of a first example of a conventional electrode unit.

FIG. 10 is a perspective view of a main part of an example of a conventional electrode unit.

FIG. 11 is a cross-sectional view of essential parts of an example of an image display device using a conventional electrode unit.

FIG. 12 is a cross-sectional view of main parts of an example of an image display device using a conventional electrode unit.

FIG. 13 is a cross-sectional view of essential parts of an example of an image display device using a conventional electrode unit.

[Explanation of symbols]

6 Electrode Units 6-a, 6-b, 6-c, 6-d, 6-e Nth and (N + 1) th Electron Beam Control Electrodes 6-a-1, 6-b-1, 6- c-1,6-d-1,6
-E-1 electron beam passage hole 6-a-2, 6-b-2, 6-c-2, 6-d-2, 6
-E-2 Anchor hole 10-a Insulation spacer 10-b, c, d, e Sprayed film

Claims (9)

(57) [Claims] 1. A face plate on which at least a phosphor screen is formed, an electrode unit in which a plurality of electron beam control electrodes having electron beam passage holes are laminated and fixed, an electron source, and a container for keeping the inside vacuum. a flat panel display device consisting of a lamination and fastening arrangement of an electron beam control electrode in the electrode unit, between the electron beam apertures of the N th electron beam control electrode insulating spacers are formed, Anchor holes are formed in the (N + 1) th electron beam control electrode corresponding to the positions of the insulating spacers formed in the Nth electron beam control electrode. After stacking the (N + 1) th electron beam control electrode via the insulating spacer, a sprayed film covers the anchor hole and covers the insulating spacer .
The structure is designed to be fused with the pacer.
Image display device. 2. A face plate having at least a phosphor screen and a plurality of electron beam control electrodes,
An electrode unit formed by laminating and fixing, an electron source, a flat panel display device comprising a container to maintain the inside to a vacuum, prior to
The electrode unit is a stack of multiple electron beam control electrodes.
・ By fixed and divided electrode module
As a laminated / fixed structure of the electron beam control electrode in the electrode module , an insulating spacer is formed at least substantially in the center of the Nth electron beam control electrode, and the (N + 1) th electron is formed. An anchor hole is formed in the beam control electrode at a position corresponding to the insulating spacer formed in the Nth electron beam control electrode,
The Nth and (N + 1) th electron beam control electrodes are laminated via the insulating spacer, and a sprayed film is formed so as to cover the anchor hole and fuse the insulating spacer. An image display device having the above structure. 3. The insulating spacer formed in the electron beam control electrode of the N-th sheet is an opening of the anchor hole portion.
The image display device according to claim 1, wherein the image display device does not protrude from the image display device. 4. A step of forming an insulating spacer between the electron beam passing holes of at least an N-th electron beam control electrode having an electron beam passing hole, and an anchor hole corresponding to a position of the insulating spacer. Formed (N + 1)
Stacking the electron beam control electrode on the N-th electron beam control electrode via the insulating spacer ,
Covers the anchor hole and fuses with the insulating spacer
A method of manufacturing an image display device, including a step of manufacturing an electrode unit in which a plurality of electron beam control electrodes are laminated and fixed by the step of forming the electrodes. 5. The process of manufacturing an electrode unit comprises a plurality of steps.
The electron beam control electrode is laminated and fixed, and the N-th sheet
An insulating spacer is placed at least approximately in the center of the control electrode.
So that the plurality of electron beam control electrodes are divided into
Process of manufacturing the electrode module, and the electrode module
And a step of arranging the modules at predetermined intervals.
The method for manufacturing an image display device according to claim 4 . As 6. electrodes sprayed film covering closing an anchor hole formed in the electron beam control electrode constituting the outermost unit, according to claim 1 characterized by using a conductive material or
Or the image display device described in 2. 7. claims characterized by using Invar material as a plurality of electron beam control electrodes (36 Ni alloy)
The image display device according to item 1 or 2. 8. A method of forming a sprayed film so as to cover and cover the anchor hole of the (N + 1) th electron beam control electrode is characterized in that a region other than a region where the sprayed film is required is covered with a mask. The image display device according to claim 4 or 5.
Manufacturing method of the device. 9. A method for forming a sprayed film, comprising at least a first method.
Melting while cooling the (N + 1) th electron beam control electrode
The image table according to claim 4 or 5, characterized in that
Manufacturing method of the indicating device.