JPS60101835A - Manufacture of picture image display - Google Patents

Abstract

PURPOSE:To improve tightness under encapsulation while to facilitate soldering, by masking voltage applying terminal except encapsulating portion with Ni thereafter performing chromium oxide processing. CONSTITUTION:An electron beam flow control electrode body 34 is provided independently from voltage applying terminals 35, 35' while employing such material as 42-6 alloy (Fe-Ni-Cr system). In order to prevent oxidization thus to prevent charging of electron beam, the electrode 34 is galvanized with Ag. Said terminals 35, 35' are masked at the front/rear of encapsulating section 39 of glass containers 32, 33 by applying resist or masking tape then non-electrolytic or electrolytic Ni galvanization 37 is performed. Thereafter, chromium oxidizing 40 is applied on the front/rear faces at the sealing portion of said terminals 35, 35'.

Description

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

Page 2 Conventional structure and its 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. It was impossible to produce a thin television receiver7
Recently, EL display elements, plasma display devices, liquid crystal display elements, etc. have been developed as flat planar display elements, but all of them are insufficient in terms of performance such as brightness, contrast, and color reproducibility of color display. The overall purpose of this device is to achieve a device that can display color television images on a lithographic display device using a nanoelectron beam, which has come into practical use. The electron beam is divided into a plurality of sections in the direction, and the electron beam is deflected in the vertical direction for each nine sections to display all the lines, and further,
Divide into multiple sections horizontally and calculate R, (r,
The phosphors such as B are made to emit light sequentially, and the phosphors R, (r
, B, etc., by controlling the amount of electron beam irradiation on the phosphors, etc., by color video signals, and displaying the entire 3-page revision image as a whole. As shown in FIG. 1, the conventional image display element has a concrete configuration that includes, in order from the rear to the front, a back electrode 1, a line cathode 2 as an electron beam source, a vertical focusing electrode 3, 3', a vertical deflection electrode 4, and a vertical deflection electrode 4. electron beam flow control electrode 5, horizontal focusing electrode 6, horizontal deflection electrode 7,
Horizontal focusing electrode 6'.

An electron beam accelerating electrode 8 and a glass container 9.22 are arranged, and all 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 all electron beams distributed linearly in the horizontal direction. In the following, only four wires 2A to 22 are shown) are provided. In this embodiment, it is assumed that 16 pieces are provided, and the number is 2I to 2Y. These wire cathodes 2 are constructed by coating a layer of oxide cathode material on the surface of a tungsten wire having a diameter of 10 to 20 μm, for example.

As will be described later, the electron beams are controlled to be emitted sequentially from the upper line cathode 2a for a fixed period of time. The back electrode 1 completely suppresses the generation of electron beams from other line cathodes 2 other than the line cathode 2 which is controlled to emit all electron beams for a certain period of time, which will be described later, and only controls all of the generated electron beams in the forward direction. It has the effect of pushing it towards. The back electrode 1 may be formed by a coating of a conductive material adhered to the inner surface of the rear wall of the glass pulp.

Also, instead of the back electrode 1 and line cathode 2, a planar electron beam emitting cathode may be used. It is a conductive plate 11 having all horizontally long slits 10, and a line cathode 2
The entire electron beam emitted from the slit 10 is taken out through the slit 10 and focused vertically.
A hole may be provided with a slot at an appropriate interval in the middle, or a row of many through holes arranged horizontally at small intervals (so that they almost touch each other), essentially forming a slit. The same applies to the vertical focusing electrode 3', which may be layered. The vertical deflection electrode 4 has the above-mentioned width IJ =
A plurality of conductors 13 and 13' are arranged horizontally in the middle of each of the insulating boards 1o, and conductors 13 and 13' are provided on the upper and lower surfaces of the insulating board 12, respectively. It consists of nine. Then, a vertical deflection voltage is applied between the opposing conductors 13 and 13'.
~, in this configuration example where the electron beam is deflected in the full vertical direction,
A pair of conductors 13 and 13' deflect the electron beam from one line cathode 2 to a position corresponding to 16 lines in the vertical direction. The 16 vertical deflection electrodes 4 constitute 15 conductor pairs corresponding to each of the 16 linear cathodes 2.

In the end, the secondary electron beam flow control electrode 5 that completely deflects the electron beam so as to trace 240 horizontal lines on the screen 21 has a vertically long length (IJ-v) 1a.
(The conductive plates 15 are arranged in parallel in a horizontal direction at predetermined intervals. In this configuration example, 320 conductive plates 15a to 15n for control electrodes are provided. (Only 10 electrodes are shown in the figure.) This electron beam flow control electrode 6 extracts the electron beam by dividing it into parts corresponding to one pixel in the horizontal direction, and controls the total amount of the electron beam passing through each pixel. The electron beam flow control electrode 6 is controlled in 6 pages according to the video signal for displaying all picture elements.
If 0.020 pixels are provided, all 320 picture elements can be displayed per horizontal line. In addition, in order to display the image in full color,
Each picture element is displayed using phosphors of three colors R, J and B, and each of the R6G and H video signals is sequentially applied to each electron beam flow control electrode 5. Also, 320 electron beams 320 sets of video signals for one line are simultaneously applied to the flow control electrode 5, and the video for one line is displayed at one time.

The horizontal focusing electrode 6 is connected to the sled 1 of the electron beam flow control electrode 5.
It is composed of a conductive plate 17 having a plurality of vertically long sleds 16 (320) facing each other, and focuses the electron beams of each picture element divided in the horizontal direction in the horizontal direction. Make it into a fine electron beam. The horizontal deflection electrode 7 is composed of a plurality of conductive plates 18 arranged vertically at intermediate positions of each of the above-mentioned When a voltage is applied, the electron beam for each picture element is deflected in the horizontal direction, and the R, G, and B fluorescent lights are sequentially irradiated on the screen 21 to cause them to emit light. Make it. In this embodiment, the deflection range is the width of one picture element for each electron beam. The accelerating electrode 8 is composed of a plurality of conductive wires 19 arranged horizontally at the same position as the vertical deflection electrode 4, and the electron beam is fully energized by the screen 21.
Accelerate so that it collides with. The screen 21 has a phosphor 20 coated on the back surface of the glass container 9, which emits light when irradiated with an electron beam, and a metal barrier layer (not shown).
is added and configured. The phosphor 20 is divided horizontally into one slit 14 of the electron beam flow control electrode 6, and fluoresces in three colors R, G, and H for each electron beam. There are two pairs of coatings, each coated in vertical stripes.

In FIG. 1, the broken lines drawn on the screen 21 indicate all the divisions in the vertical direction that are displayed corresponding to each of the plurality of line cathodes 2, and the two-dot chain lines indicate the control of the plurality of electron beam flows. The horizontal divisions displayed corresponding to the positions of the electrodes 5 are shown. As shown in the enlarged view in Fig. 2, each n*1 section divided by these two has R, G, and G for one pixel in the horizontal direction.
, B, and has a width of 16 lines in the vertical direction. Note that the person in the figure is one section in the vertical direction, and B is one section in the horizontal direction. For example, the size of one section is 1 kaku in the horizontal direction and 16 I+1+ in the vertical direction.
Note that in FIG. 1, the length in the horizontal direction is greatly expanded relative to the vertical direction for clarity.

In this embodiment, R, G, and B phosphors 2 are used for one electron beam flow control electrode 5, that is, for one electron beam.
Although only one pair of 0's is provided for one picture element, it is of course possible to provide two or more picture elements, and in that case, the electron beam flow control electrode 6 has a pair of zeros for two or more picture elements. R, G, B
Video signals are sequentially applied, and horizontal deflection is performed in synchronization with n and n.

The above is the general principle of the image display device. Next, a method for manufacturing the above device will be explained with reference to FIG. The back electrode 1 to the horizontal deflection electrode 7 are fixed to each other at a predetermined distance and positioned in the electrode plane direction by a coupling spacer 9 and a page spacer 23, and then stored in a glass container. The image display device is now complete. Here, positioning between the electrodes in the in-plane direction of the electrodes is as follows: 1, 2. 3.
4. 5.6. This is done by a positioning hole 24 that is accurately drilled in each of the electrodes 7, electron beam source holding means, and accelerating electrode holding means (both not shown), and a positioning pin 26vc that commonly passes through the positioning hole 24. When fixing all electrodes, due to the manufacturing process, it is recommended to divide the area from the electron beam flow control electrode to the horizontal deflection electrode into several units, fix each unit, and then fix the units together. This is because the electron beam flow control electrode unit and horizontal deflection electrode unit constitute the entire electrical electrode, so they must be divided into a part to which a 10 charge is applied and a part to which a negative charge is applied. This is because it doesn't happen. However, since these patterns have an extremely small slot width and an extremely thin plate thickness, it is difficult to fix them by firing in a divided state. Therefore, the electron beam flow control electric current and the horizontal side 1
0 Usually, the electrodes within the page are baked and fixed to form a unit, and then the entire electrode pattern is divided by a method such as a laser. These components housed in a glass container must be connected to terminals in order to apply the full voltage, but as shown in FIG. The terminal portion 26 which has become
22, and it is now possible to apply a voltage.

Also, for other multiple electrodes, use side terminals (not shown)
A voltage can be applied by connecting all the wires to a plurality of electrodes and extending a part of the side terminal to the outside of the glass container at a position different from the terminal portion 26.

Here, the electron beam flow control electrode 5 can be connected with a - wire like the other electrodes, but since high voltage is applied to the electron beam flow control electrode 6, use a thin wire for the wire connection. However, since the electron beam flow control electrode 5 is extremely thin, connecting it with the thick wire may cause the terminal to bend, contact other terminals or patterns, and cause a short circuit. There is a fear of doing so. Furthermore,
By using all of the thick 11 page lines, the inner wall of the glass container must be made thicker, and the entire image display device cannot be made smaller and lighter. The control electrode terminal 26, which is integrated with the electron beam flow control electrode, is sandwiched between the glass containers 9 and 22 and fixed and sealed with adhesive via an adhesive frit.
As mentioned above, since the control electrode terminal 26 is extremely thin, stress is generated due to the difference in thermal expansion when the control electrode terminal 26 is bonded and fixed, and the control electrode terminal 26 is broken and no voltage is applied to the electrode. As a result, the image cannot be displayed. Further, the electrode surface is plated with Ag to prevent oxidation of the electrode and prevent electron beam gold flashing. However, since this electrode was sealed in a glass container through an adhesive frit, the adhesion with the adhesive frit deteriorated due to migration of Ag on the electrode surface, causing leakage from this sealed part and making it impossible to obtain a stable image. . For this reason, the usual method of sealing is to use electrodes or terminals treated with chromium oxide, but it is impossible to solder lead wires to apply voltage to the chromium oxide treated parts. , when soldering, the entire chromium oxide treated part must be mechanically scraped off before soldering. However, as mentioned above, the thickness of the terminal is extremely thin, so there is no way to remove it mechanically, such as by grinding. There is a method of removing all the layers by board or sandblasting, but it is not practical because it causes glue or extreme bending of the terminals.
However, it had many drawbacks such as increased man-hours and cost reduction. Purpose of the Invention In view of the above drawbacks, the present invention aims to completely improve the adhesion during sealing and completely prevent leakage, and furthermore. The present invention is designed to facilitate soldering, and aims to provide an image display device with high reliability and stable image quality.

Structure of the Invention The manufacturing method of the present invention is as follows: After providing the electron beam flow control electrode body and the voltage application terminal entirely separately, and further providing other electrodes and side terminal metal separately, the voltage application terminal and the side terminal are provided separately. Sealing the terminal with a glass container Page 13 After masking the parts other than the sealed part with N emulsion, treat the sealed part with chromium oxide and combine it with the electrode body to make it one piece. The adhesive is sealed using adhesive material to improve the adhesion strength.Soldering outside the container is also possible using Ni.
Since it is plated and removed, it has the unique effect of being easy to assemble.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 5 and 6 show image displays in one embodiment of the invention, in which the assembled components from the cathode 30 to the phosphor 31 are sealed in a glass container 32, 33 via an adhesive frit 38. The interior is completely vacuumed and completed. The electron beam flow control electrode body 34 and the voltage application terminals 35, 35' in this electrode are separate bodies, and the other electrodes and side terminals are also separate bodies. (Not shown) The material of the electrode body and terminal is 42-6 alloy (Fe-Ni-Or
system). An example of the electron beam flow control electrode 14 and the voltage application terminal will be described below. As mentioned above, the electron beam flow control electrode 34 is plated with Ag to completely prevent oxidation and charge the electron beam. The separate voltage application terminal 36°36' is connected to the glass container 32.
．． The front and back surfaces corresponding to the sealing portion 39 of 33 are coated with resist or masked with masking tape, and electroless or electrolytic Ni plating 37 is performed, that is, the entire portion except the sealing portion is N1 plated. It would be better if this masking was performed during the chromium oxide treatment, but as will be described later, the temperature of the chromium oxide treatment 4o is high, so masking during the chromium oxide treatment is difficult. Also, Ni is used as a masking material.

It must be a metal that has a melting point higher than the chromium oxide treatment temperature of Pt9, In, etc. This is because the metal plating melts during the chromium oxide treatment, and parts other than the sealing part are also treated with chromium oxide, and voltage is applied to the electron beam flow control electrode 34, so the voltage application terminal 3
This is because the 16th page is impossible to solder when all the lead wires are soldered to Ei and 35'.

The chromium oxide treatment conditions are as follows: Temperature: 100°C to 1100°C Water vapor amount: Dew point 20°C H2 gas: 100°C Time: 30 to 60 minutes The process was carried out on the front and back surfaces corresponding to the sealed parts of the terminals 35 and 35' for full voltage application. It is. Further, the chromium oxide treatment may be applied to the entire interior of the glass container from the sealed portion.

As masking metals, there are the metals mentioned above, but since they are expensive other than Ni, Ni-plating is the most suitable.Also, if the film thickness is 50/jn or more, it will ensure that Or is not on the Ni surface.・This voltage application terminal 3
5.35'i electron beam flow control electrode 34 and laser
are joined at spots etc. to form a single body.

In addition to the effects of the invention, as in the present invention, after the voltage application terminal is masked with Ni plating on all parts except the sealing part, only the sealing part is treated with chromium oxide, and all the terminals are integrally joined with the electrode body by laser or spot welding. By sealing with the chromium oxide treated part, the density and strength are improved, there is no need to worry about leakage, and it is also easy to solder to lead wires, resulting in an inexpensive image display device with long-term stable image quality. It became possible to supply large quantities.

[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 electrode during the electrode manufacturing process, and Fig. 4 is a conventional electronic Cross-sectional view of the beam flow control electrode. FIG. 6 is a cross-sectional view of an electron beam flow control electrode according to an embodiment of the present invention, and FIG. 6 is an enlarged cross-sectional view of a main part thereof. 2.30... Cathode, 21.31... Fluorescent material, 9.22, 32.33... Glass container, 6,
34... Electron beam flow control electrode, 26, 35.
35'... Voltage application terminal, 37...
N1 Me Tsuki, 38...Adhesive frit, 39.
...Sealing part, 4o, old... oxidized chlorine 1, - treatment. Name of agent: Patent attorney Toshio Nakao and one other person. 4th [! ] q? ? Figure 5 230 Figure 6

Claims (1)

[Claims] (1) A plurality of electrodes are provided between the cathode and the phosphor, and all components such as the cathode and the phosphor are inserted into a glass container, and then bonded above and below the glass container. A method for manufacturing an image display device in which the electrode main body and the terminal portion of the image display device are sealed via a fluorite, and the electrode body and the terminal portion are separated and then plated with fNi except for the sealed portion of the terminal portion. (3) A method for manufacturing an image display device according to claim 1 or 2, in which only the sealed portion of the terminal portion is subjected to full chromium oxide treatment.