JPS6093733A - Production of electrode of picture display device - Google Patents

Abstract

PURPOSE:To enhance the adhesive strength, by silver-plating and then aluminum vapor depositing the surface of electrodes when an electron beam current control electrode or a horizontal defecting electrode are burnt for fixing through a binding spacer by means of adhesive frit. CONSTITUTION:A rear electrode 1, a wire electrode 2, a vertical focusing electrode 3, a vertical deflecting electrode 4, an electron beam current control electrode 5, a horizontal focusing electrode 6, a horizontal deflecting electrode 7, and an accelerating electrode 6, a horizontal deflecting electrode 7, and an accelerating electrode 8 are housed in glass containers 9, 22 in order to constitute a picture display device. In this case said electrodes 5 are burnt to fix each other, after the surfaces of electrodes 30, 31 made of 42-6 alloy are silver-plated to form 35, 35', and then are aluminum vapor deposited thereon, thereafter piled up one above another through a binding spacer 32 coated with insulating frits 36, 36' and adhesive frits 33, 33'. Consequently, the effect caused by exfoliation can be eliminated by increasing the adhesive strength to the adhesive frit and the picture quality can be stabilized by unifying the thickness thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing electrodes for image display devices in video equipment.

Conventional configurations and their problems Traditionally, 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 use for thin TVs. It was impossible to build a John receiver.

In addition, recently, EL display elements and plasma display devices are used as flat display elements.

Liquid crystal display elements have been developed, but all of them have low brightness, contrast, and color display.
It is insufficient in terms of L capacity and has not yet been put into practical use. Therefore, we aimed to achieve a device that can display color television images on a flat display device using electron beams.The screen was divided into multiple sections in the plane direction, and each section was divided into two sections. Display multiple lines in the vertical direction (jut direction) for all the electronic beats on jσ, and further divide it into multiple sections horizontally and display one minute each.
The R, G, and B phosphors are made to emit light in sequence in lJ, and the R, (,.

11ζ of '1silbino to fluorophores such as B: 1;
The conventional image display element displays a television image as a whole by applying VC so that it is determined by a color video signal.0 As shown in Fig. 1, the conventional image display element In order, a back electrode 1, a line cathode 2 as an electron beam source, a vertical focusing sand 3°3', a vertical deflection electrode 4, an electron beam flow control electrode 6, a horizontal focusing electrode 6,
The structure includes a horizontal deflection electrode 7, an electron beam accelerating electrode 8, and glass containers 9 and 22. 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. In the figure, only four wires 2-2 are shown). In this embodiment, it is assumed that 16 wire cathodes (d) are provided, and the number of wire cathodes 2 is 2 I to 2 Y.
Oxide cathode material is coated on the surface of the φ tungsten wire.
It consists of

Then, as will be described later, the electron beams 1 are controlled to be emitted sequentially from the line cathode 2a for a fixed period of time. A potential gradient is created between the rear electrode 1 and the direct focusing electrode 3 (described later), and from the line cathode 2 other than the line cathode 2 marked with σ to emit the electron beam for a certain period of time as described above. This suppresses the generation of electron beams.

It also functions to push out the generated electron beam only in the forward direction. The back electrode 1 may be formed by a rod (A), which is rigidly attached to the inner surface of the rear wall of the glass bulb. However, instead of the back electrode 1 and the line cathode 2, an electron beam emitting cathode with a single surface may be used. The vertical focusing electrode 3 is a line shade '#A2-2
It is a conductive plate 11 having horizontally long slits 10 facing each side.

The electron beam emitted from the line cathode 2 is passed through the slit 10.
and vertically focused. vinegar'
Jnot/101d There may be bars provided at appropriate intervals along the way, or a large number of bars may be arranged side by side at small intervals in the horizontal direction (so that they almost touch each other).
The row of through holes may be substantially closed with slits. The vertical focusing electrode 3' is also similar. A plurality of vertical deflection electrodes 4 are arranged horizontally at intermediate positions of the slits 1o, and conductors 13 and 13' are provided on the upper and lower surfaces of the insulating substrate 12, respectively.
It is made up of small things. Then, a vertical deflection voltage is applied between the conductors 13.13' facing the phase χ·1 to deflect the electron beam in the vertical direction.In this configuration example, the pair of conductors 13.13' The electron beam from the book line cathode 2 is vertically deflected to a position corresponding to 16 lines.

Then, 16 pairs of conductors corresponding to each of the 16 line cathodes 2 are formed by the 16 vertical deflection electrodes 4, and in the end, the electron beam is emitted so as to draw 240 horizontal lines on the screen 21. deflect. Next, the electron beam flow fljlJ tall electrodes 5 are composed of conductive plates 15 each having a vertically long slit 14, and are arranged in plural numbers in parallel in the horizontal direction with predetermined intervals.

In this configuration example, there are 320 it'll
L groove electric plates 15a to 16n are provided (10 in the figure).
(only books shown). This electronic beano flow side fil'
tUi, pole 5, each of which directs the electron beam horizontally by 1
Each picture element is divided and taken out, and the amount of passage is calculated according to the video signal for displaying each picture element.

Therefore, the electron beam flow 11tllω11 electrode 6 is 320
With this arrangement, 320 picture elements can be displayed per horizontal line. In order to display images in color, each picture element is displayed using phosphors in three colors: R, C, and B.
Each electron beam stream 11ilJσil electrode 5 [ktsoR
, G, and B are added 1[directly. Also, 3
The 20 electron beam stream side electrodes 6 have 32 beams for one line.
The video signal of set 0 is added to the same 11h, and one line of video is displayed at one time. The horizontal focusing electrode 6 is composed of a conductive plate 17 having a plurality of vertically long slits 16 (320 slits 16) opposite to the slits 14 of the electron flow side control 7111 electrode 6. The electron beams for each picture element are focused in the horizontal direction to form an electronic beam. The horizontal deflection electrode 7 is composed of conductive plates 18 arranged vertically in several stages in the middle of each of the two slits 16, and a horizontal deflection voltage is applied between each of the conductive plates 18. Each electron beam of 1σ picture element is deflected in the horizontal direction, and the screen 21
Above, each of the R, G, and B phosphors is irradiated (111'I) to cause them to emit light. The deflection range (-), in this embodiment, is the width of one picture element for each electron beam f5.

The accelerating electrode 8Fi is composed of a plurality of conductive wires 19 installed horizontally in the same position as the vertical (mt-direction set electrode 4), and the electron beam is directed to the screen 21 with sufficient energy.
Accelerate so that it collides with. The screen 21 has a phosphor 2o that emits light when irradiated with an electron beam applied to the back surface of the glass container 9, and a metal back layer (not shown).
is added and configured. [The fluorescent material 20 is on the electron beam flow side] For one slit 14 of one electrode 6, that is, for each one electron beam divided in the horizontal direction, three colors of R, G, and B are fluorescent. A pair of light bodies are provided, and the light bodies are applied in stripes in the vertical direction. The broken lines drawn on the screen 21 in FIG.
The two-dot chain line indicates the division in the vertical direction that is displayed corresponding to each of the electron beam flows.
The horizontal divisions displayed corresponding to the electrodes 5 are shown. As shown in the enlarged view in Figure 2, one section partitioned by these two has an R of one picture element in the horizontal direction.
, G, and B, and has a width of 16 lines in the vertical direction. In addition, the number of people in the figure is 6 in one section in the vertical direction! l), B is a section in the horizontal direction. The thickness of one section is, for example, the horizontal force! 1 mm and 1671 IW in the vertical direction. Note that in FIG. 1, for the sake of clarity, the length in the horizontal direction has been stretched out to be much larger than the vertical blade rBJ to provide lift. In this example, one piece of the electron beam downstream side (
property) R for the electrode 5, i.e., the one-piece electric wire 7-height,
Although only one pair of G and B phosphors 2o is provided for one picture element, it is of course possible to have two or more picture elements.
In that case, the picture electrode 6 on the electron beam stream side has R and G for two or more picture elements.

The B video signal is sequentially applied, and the water E deflection is performed in synchronization with it. The following 1- is the closing i of the image display device i'i'
No. 14 C:- It is true. Next, 1) Manufacture of the device J < Nine force θ
The angle will be explained with reference to FIG. From the back electrode 1 to the back electrode 1)-7211, the bonding spacer 23 positions the electrode in a predetermined IHI I+' uniformity and in the in-plane direction of the electrode.
1111i), then glass volume 8:;
The j1bi image display device 1 is completed by storing it in the t''1. Here, the gap between the electrodes is '1h: 41'': lrl! Inward positioning is 1+ 2+ 3+ 'L+ 61''
This is done by a positioning hole 24 that is accurately drilled in each of the electrodes 17, an electron beam source holding means, and an accelerating electrode holding means (both not shown), and a positioning pin 25 that commonly passes through the positioning hole 24. When fixing each electrode, due to the manufacturing process, it is necessary to divide the area from the electron beam downstream electrode to the Mizuko〇old phrase electrode into several units, and after fixing each unit, fix the other units. method has been adopted.

This is because the electron beam stream side electrode unit and the horizontal deflection electrode unit constitute electrical electrodes and must be divided into a part to which a 10 charge is applied and a part to which a negative charge is applied. However, because these pattern loss slit widths are extremely small and the board thickness is extremely thin, it is difficult to bake and fix them in a divided state. Therefore, the electron beam flow side cape electrode and the horizontal deflection electrode are usually fired and fixed to form a unit, and then the electrode pattern is divided by a method such as a laser. Conventional electron beam downstream side ω(
]' Electrode electrode unit box 4 As shown in Figure 4, an electron beam downstream picture electrode made of 42-6 alloy & a bonding spacer 23 made of the same (42-6 alloy) is interposed between 26 and b27 and fired with a frit. By fixing, the electron beam stream side n-electrode unit is completed.In order to apply voltage to the electron beam stream side electrodes &26 and b27, an insulating frit 4o is applied to the front and back sides of the coupling spacer 23, and the electrodes are After applying insulation between the electron beam flow control electrodes!
The electrode unit is completed by applying adhesive frit 28 for adhesion to L26 and b27 and firing.

In addition, in the above configuration, since the electron beam flow side blocking electrodes a26 and b27 and the coupling spacer 23 use 42-6 alloy as the base metal, it is necessary to use a material with a thermal expansion coefficient similar to that of the adhesive. Fixed. In addition, the electrode surfaces of the IL child beam control current side 2L26 and b27 are coated with Ag plating 29, since electrons will be damaged if there is an oxide thereon.

However, since the adhesive strength between the 7'1 frit 2"8 and the Ag plating 29 is weak, the adhesive f') gutter 2B peels off when handling the electrode, resulting in uneven thickness and uneven image quality. The color becomes uneven.Also, the peeled adhesive frit 2
When the powder No. 8 falls off and adheres to the electrode surface, it appears as a black spot, which has many drawbacks.

OBJECTS OF THE INVENTION In view of the above drawbacks, the present invention aims to provide an image display device that improves the adhesive strength between electrodes and coupling spacers and is free from image defects such as color unevenness and black spots.

Structure of the Invention The method for manufacturing electrodes for an image display device of the present invention is to improve the adhesive strength between the electrode and the coupling spacer when the electron beam flow control electrode or the horizontal deflection electrode is baked and fixed with an adhesive frit via a coupling spacer. Antioxidant A on the surface of the electrode
After g plating, A1 vapor deposition is applied to the h'g plating surface to improve the adhesive strength.
This eliminates uneven thickness of the electrode due to the 71J method, improves accuracy, and creates a very beautiful image with no color unevenness.It also eliminates black spots on the image caused by adhesive frit powder adhering to the electrode due to adhesion frit peeling. It is something.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 6 shows a method of manufacturing an electrode according to an embodiment of the present invention, in which a coupling spacer 32 is interposed between the electron beam downstream electrodes &30 and b31 in the electron beam downstream control electrode unit; This coupling spacer 3
2, an insulating frit 36 is attached to the coupling spacer 32 in order to apply voltage to the electron beam flow side electrodes a30 and b31.
．． 36' is the applied one. Furthermore, an adhesive flint 33.degree. 33' is applied to this surface, making it possible to fix it by firing with the electron beam flow side electrodes a30 and t)31. Electron beam flow revealed 1ijj; Ag on the surfaces of poles a30 and b31
After plating 36i and 36', Al vapor deposition 34 and 34' are performed. Due to the voltage application, the electron beam current side is
As mentioned above, 30 and b31 must be divided into a part to which a positive charge is applied and a part to which a negative charge is applied, and since they cannot be divided into individual parts, they are fixed by firing through an insulating layer. The insulating layer could be made of a glass plate or the like, but it cannot be used as a spacer because the base hole, F, and 17 degrees cannot be produced by etching, and it tends to tilt upward when handled. Figure 6 shows the product with Al vapor deposited and the Al
The graph shows a comparison of the tensile strength with the one without vapor deposition, and the tensile strength of the one with Al vapor deposition is about 30% higher on average, and the adhesive strength is improved, so the peeling of the adhesive frit is also reduced. This greatly reduces the amount of adhesive frit powder, improving thickness accuracy and eliminating the possibility of adhesive frit powder falling off.

Effects of the invention (1) As in the present invention, an electrode made of 42-6 alloy is plated with Ag, and then an insulating frit is applied to an Al vapor-deposited object and a bonding spacer, and then an adhesive frit is applied and fixed by firing. With this method, the adhesive strength between the adhesive frit and the adhesive frit is -1, so there is no peeling of the adhesive frit, and the thickness is uniform, so there is no color unevenness on the image, and the adhesive frit does not peel off. There is also no influence of sunspots caused by powder, making it possible to supply large quantities of highly reliable image display devices with stable image quality.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of an image display element used in an image display device, Fig. 2 is an enlarged plan view of a screen, Fig. 3 is an exploded perspective view of an image display element showing an electrode manufacturing method, and Fig. 4 is a conventional FIG. 6 is a cross-sectional view showing an electrode in an embodiment of the present invention, and FIG. 6 is a graph comparing the tensile strength between the conventional method and the method of manufacturing the electrode of the present invention. be. 2... Cathode, 21... Fluorescent material, 9,2
2...Glass container, 23.32...Coupling spacer, 4o. 36.36'・・・Insulation frit, 29.36,
3E5'...Ag plating, 28, 33.33'.
...Adhesive frit, 34, 34'...A1
Steam A'jn's agent's name: Patent attorney Toshi Nakao
Figure 2 and 1 Figure 6

Claims (1)

[Claims] A plurality of electrodes are provided between the cathode and the phosphor, an insulating frit is applied between the plurality of electrodes via a coupling spacer, and the unit is fixed by firing with an adhesive frit.
After inserting the electrode components into a glass container, they were sealed in the glass container through an adhesive frit, and the 42-6 alloy of the electrode base metal of the image display device was plated with Ag, and then one surface was coated with A.
A method for manufacturing electrodes of an image display device using evaporation.