JPS63152832A - Manufacture of image display device - Google Patents

Abstract

PURPOSE:To obtain a high quality image display device with each plate electrode accurately joint fixed at given intervals by heating linear spacers to a melting temperature of low melting point glasses with linear spacers pressed by a stamper in a condition where linear spacers are positioned by positioning pins. CONSTITUTION:Linear spacers 35 in which its surface is formed by an insulation material and low melting point glasses 34 are applied to its surface are inserted between each plate electrode, and low melting point glasses 34 are made to be supplied to joint fixed parts of each plate electrode 33. Positioning pins 36 stood on a baked substrate 37 are inserted into long apertures provided to both ends of spacers 35 and positioning pins 38 stood on the baked substrate are inserted into round apertures provided to each plate electrode 33. A mutual position alignment of each plate electrode 33 and spacers 35 is made by these positioning pins 36 and 38. And each plate electrode 33 and spacers 35 are pressed to the baked substrate 37 side by a stamper, and a joint fixing is conducted with each plate electrode and spacers are heated in a furnace to a melting temperature of low melting point glasses 34 in the condition.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of manufacturing a flat display device for video equipment.

Conventional technology Conventionally, cathode ray tubes have been mainly used as display elements for displaying color television images, but conventional cathode ray tubes have a much longer depth than the screen, making it difficult to manufacture thin television receivers. It was impossible to do so.

Recently, EL display elements and plasma display devices have been used as flat display elements.

Although liquid crystal display elements and the like have been developed, all of them are insufficient in terms of performance such as brightness, contrast, and color reproducibility of color display, and have not been put into practical use.

Therefore, in order to achieve a display device on a flat panel using electron beams, the present applicant filed Japanese Patent Application No. 56-20618 (
A novel display device was proposed in Japanese Patent Application Laid-Open No. 57-135590.

This involves dividing the screen into multiple sections vertically, deflecting the electron beam vertically in each section to display multiple lines, and then dividing the screen into multiple sections horizontally. The R, G, B, etc. phosphors are made to sequentially emit light for each section, and the amount of electron beam irradiation to the R, G, B, etc. phosphors is controlled by a color video signal. It displays a television image as a whole.

As shown in FIG. 3, the conventional image display element has a back electrode 1. Line cathode as electron beam source2. Vertical focusing electrodes 3a, 3b, vertical deflection electrodes 4. Electron beam flow control electrode6. Horizontal focusing electrode 6
．． It consists of a horizontal deflection electrode 7, an electron beam accelerating electrode 8, and a screen 9, and the components are housed in the glass container and evacuated. A line cathode 2 serving as an electron beam source is stretched horizontally so as to generate an electron beam distributed linearly in the horizontal direction.

The back electrode 1 functions to push the electron beam generated from the line cathode 2 only forward.

The vertical focusing electrode 3a is a conductive plate 11 having a horizontally long slit 1o facing each of the line cathodes 2, and takes out the electron beam emitted from the line cathode 2 through the slit 1o and focuses it in the vertical direction. The vertical focusing electrode 3b is also similar. A plurality of vertical deflection electrodes 4 are arranged horizontally in the middle of each of the slits 1o, and each of the vertical deflection electrodes 4 is composed of conductors 13a and 13b provided on the upper and lower surfaces of an insulating substrate 12. ing. And conductors 13a facing each other.

Each conductor 15 has a vertically long slit 14, and a plurality of conductors 15 are arranged horizontally at a predetermined interval. In this configuration example, 320 control electrode conductive plates 15a to 15n are provided (only 10 are shown in the figure).The horizontal focusing electrode 6 is the control electrode 6.
A plurality of long vertically facing slits 14 (3
It is composed of a conductive plate 17 having 20 slits 16, and focuses the electron beams of each picture element divided horizontally into a narrow electron beam.

The horizontal deflection electrode 7 is a plurality of conductive plates 153 arranged vertically at intermediate positions between the slits 16.
a and 18b, and a horizontal deflection voltage is applied between each to deflect the electron beam of each pixel in the horizontal direction, causing R, G, and B fluorescence to appear on the screen 9. The body is sequentially irradiated to emit light. The deflection range is the width of one picture element for each electron beam. Accelerating electrode 8
is composed of a plurality of conductive plates 19 horizontally provided at the same position as the vertical deflection electrode 4, and accelerates the electron beam so that it collides with the screen 9 with sufficient energy.

The screen 9 is constructed by coating the back surface of a glass container 21 with a phosphor 20 that emits light when irradiated with an electron beam, and adding a metal back layer (not shown).

Therefore, in order to obtain a high-quality image in the above-mentioned flat display device, in particular, the vertical focusing electrode 3b, the electron beam flow control electrode 5°, the horizontal focusing electrode 6. It is necessary to bond and fix the horizontal deflection electrodes 7 with high precision while maintaining a predetermined interval, and the bonding surfaces are each electrode (flat plate electrode), and the surface between each plate electrode is formed of an insulating material, and A spacer 24 whose surface is coated with low melting point glass 23 is inserted.

This block in which each flat plate electrode 22 and spacer 24 are layered is made up of pins 2 set up on a fired substrate 25 such as a flat plate.
6, and pressurized with a stamper 27. In this state, it is heated to the melting temperature of the low melting point glass 23 and the low melting point glass 23 is crushed to join each flat electrode 22 and the spacer 24.

FIG. 6 shows a detailed plane cutaway view of the joint and fixing portion of each flat electrode and spacer. 28 is a flat plate electrode, which has a slit 29 through which the electron beam passes.

3o is a spacer whose surface is made of an insulating material, and is provided with a portion 31 that does not shield the electron beam emitted from the slit 29, and a low melting point glass 32 for bonding is coated on the front and back sides of the space other than the window portion 31. flat plate electrode 2
It is superimposed on top of 8. 33 is a slit 34 through which the electron beam passes. flat plate electrode 28, spacer 30,
The flat electrodes 33 are mutually positioned on the fired substrate 36 by positioning pins 36 set up on the fired substrate 36.

Furthermore, a flat stamper (not shown) is attached to the flat plate electrode 3.
3 from above and heated under pressure to the melting recrystallization temperature of the low melting point glass to bond and fix the flat plate electrodes 28, 33 and the spacer 30.

Problems to be Solved by the Invention However, in such a structure, since at least the surface of the spacer 3° is made of an insulating material, the flat electrode 28
．． There is a difference in thermal expansion coefficient between 32 and 33, and low melting point glass 32
After heating to the melt recrystallization temperature and completing the bonding, thermal stress is generated in the x and y direction as it cools down, and as shown in Figure 6, the flat plate electrode, which was rectangular as shown in a before bonding, becomes as shown in b. This deformed into a complicated shape, reducing the accuracy of the electronic vinyl's landing on the screen surface. Also, from the viewpoint of material yield, the spacer 30 has a large window 31, and the area of approximately H of the plate material used for the spacer 3o is
It was necessary to remove it in step 1, which caused high material costs.

In view of the above-mentioned drawbacks, the present invention uses a linear spacer with a long hole at both ends, or a long hole at one end and a round hole at the other end to maintain a constant and accurate spacing between the flat electrodes. The present invention provides a manufacturing method that allows a highly reliable image display device to be obtained.

Means for Solving the Problems The method for manufacturing an image display device of the present invention, which solves the above-mentioned problems, provides a fired substrate with flatness and vertical positioning pins when bonding and fixing the plurality of flat electrodes. The plurality of linear spacers coated with low melting point glass for bonding are placed on top of the insulating material, either by providing a long hole at both ends, or by providing a long hole at one end and a round hole at the other end. The stamper is inserted between the flat plate electrodes into a bonding fixing part through which the electron beam does not pass, and is positioned with the positioning pin through the elongated hole or round hole, and the stampers with flatness are stacked on top of each other, and the low melting point glass for bonding is It is heated and pressurized to melting temperature.

For production The effect of this technical means is as follows.

In other words, on a fired substrate with vertical positioning pins,
A linear spacer with a long hole for positioning at both ends or one end is installed at the joint fixing part between each flat electrode via a positioning pin, and heated and pressurized to join the flat electrodes and spacers with different coefficients of thermal expansion. To fix the bond, the difference in thermal expansion when the temperature rises is released through the long holes provided in the spacer, and the thermal stress that occurs when cooling after bonding and fixation occurs only in the linear direction of the spacer, causing complicated deformation of each flat electrode. The joint and fixation can be performed without any trouble.

As a result, each flat plate electrode is accurately joined and fixed at predetermined intervals, making it possible to provide a high-quality image display device.

EXAMPLE An example of the present invention will be described below with reference to the drawings. FIG. 1 shows a method of joining and fixing each flat electrode in an embodiment of the present invention. In FIG. 1, numeral 33 indicates each flat plate electrode, and a linear spacer 35 whose at least the surface is formed of an insulating material and whose surface is coated with low melting glass 34 is inserted between each flat plate electrode. In addition, low melting point glass 34 is supplied to the bonding and fixing portion of each flat plate electrode 33. Reference numeral 36 denotes a positioning pin that is set up on the fired substrate 37 and inserted into elongated holes provided at both ends of the spacer 36 . 38 is also a positioning pin erected on the fired substrate, and is inserted into a round hole provided in each flat electrode 33. The mutual alignment of each flat electrode 33 and spacer 35 is performed by these positioning pins 36, 38.

39 is a stamper, each flat electrode 33 and spacer 3;
6 is pressed against the firing substrate 37 side. In this state, the glass is heated in a furnace to the melting temperature of the low melting point glass 34, and bonded and fixed. FIG. 2 is a cross-sectional view showing the positional relationship between each of the flat electrodes and the spacers, which are positioned on the combustion substrate by positioning pins. 4o in Figure 2
is a fired substrate, on which a lower flat plate electrode 41 is set, and on which elongated holes 42 are provided at both ends, and a wire whose front surface is made of an insulating material and whose back surface is coated with low-melting glass 43 is formed. A shaped spacer 44 is set.

Since the spacer 44 has a surface made of an insulating material, its coefficient of thermal expansion is smaller than that of the flat plate electrode. In this case, positioning pins 46 erected on the fired substrate 40 are inserted into elongated holes 42 provided at both ends of the spacer 440 so that the low melting point glass 43 is located at the joint 45 of the flat plate electrode 41 for positioning. The upper flat plate electrode 47 is set from above this spacer 44, and aligned with the flat plate electrode 41 using positioning pins set on the fired substrate 4o, and then placed on the fired substrate 40 side using a system stamper (not shown). Then, the flat plate electrodes 41 and 47 and the spacer 44 are heated to the melting temperature of the low melting point glass 43 while being pressurized.

During heating, the difference in thermal expansion between the flat plate electrodes 44 and 47 and the spacer 44 (the thermal expansion of the spacer is small) can be released through the elongated hole 42 provided in the spacer 44. Therefore, the spacer 44 is joined to the flat plate electrodes 41 and 47 without deformation at the time when the low melting point glass applied to the spacer begins to melt and recrystallize. After this, during the cooling process, thermal stress is generated between the flat plate electrodes 41 and 47 and the spacer 44 in the direction of arrow X.
-47 is in a state of being extended only in the direction of the arrow X than before joining, and there is no deformation, and it is extending at equal intervals, so either make the flat plate electrodes 41 and 47 short before joining, or This can be addressed by extending the pitch of the phosphor. After bonding and fixing, the half-etched and etched portions 49 provided on the spacer 44 are cut out to form the elongated hole portions 4 of the spacer.
2 is removed, and the bonding and fixing of the flat plate electrodes 41 and 47 and the spacer 44 is completed. In one embodiment of the present invention, only the case where two flat plate electrodes are stacked is explained, but the same effect can be obtained when a large number of flat plate electrodes are stacked.

In one embodiment of the present invention, elongated holes were provided at both ends of the spacer 44 and positioning pins were inserted therein. However, if either end is an elongated hole, the difference in thermal expansion between the spacer and the flat electrode can be absorbed. You can miss it.

Further, in the present invention, crystalline low-melting glass is used as the bonding material, but amorphous glass may be used as long as it is not heated above the melting point after bonding and fixing.

Effects of the Invention As described above, the present invention provides a spacer with a long hole for positioning at both ends or one end on a fired substrate having vertical positioning pins, and connects each flat electrode through the positioning pin. It is installed on a fixed part and heated and pressurized to bond and fix the spacer with a flat plate electrode with different coefficients of thermal expansion, so the difference in thermal expansion when the temperature rises is released through the long hole in the spacer, and occurs when it cools down after being bonded and fixed. Since the thermal stress is generated only in the linear direction of the spacer, each flat plate can be accurately fixed at predetermined intervals without causing complicated deformation, and a high-quality image display device can be provided. In addition, the material cost is H compared to conventional spacers, and since the spacer is linear, it is possible to process insulation on the surface and apply low-melting glass, which greatly reduces work time and reduces costs. can contribute.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a method of joining and fixing each flat electrode in an embodiment of the present invention, FIG. The figure is an exploded perspective view showing the basic configuration of an image front used in a conventional flat display device, Figure 4 is a front view showing the conventional method of joining and fixing each flat plate electrode, and Figure 6 is a front view showing each conventional flat plate electrode. Cross-sectional view showing details of the joint and fixing part of the spacer and the spacer, FIGS. 6a and b
FIG. 2 is a plan view showing how a flat plate electrode is deformed. 33641/47... Each flat electrode, 34/43
...Low melting point glass, 35Φ44 ... Linear spacer, 42 ... Long hole, 36, 46 ...
. . . Positioning pin, 37, 40 . . . Baked substrate, 39 . Name of agent: Patent attorney Toshio Nakao and 1 other person83
-Each hand M skin: I? --Jinke・78- Figure 4 Masu

Claims (1)

[Claims] In an image display device in which a plurality of flat electrodes are held at a predetermined interval between a linear cathode and a screen plate, when the plurality of flat electrodes are bonded and fixed at a predetermined interval, flatness is obtained and the vertical positioning pin is A linear spacer with a long hole at both ends, or a long hole at one end and a round hole at the other end, or a linear spacer coated with low-melting glass for bonding on an insulator, on a fired substrate. is inserted between the plurality of flat plate electrodes into a bonded and fixed part through which the electron beam does not pass, and is positioned with the positioning pin through the elongated hole or round hole,
A method for manufacturing an image display device, in which heating is performed to the melting temperature of the low melting point glass while applying pressure with a flat stamper.