JPS6095822A - Method of manufacturing picture display device - Google Patents

Abstract

PURPOSE:To obtain beautiful pictures and picture quality with long term stability, and high reliability by bending terminals for applying voltage simultaneously and laser-welding the terminals for applying the voltage to an electrode for controlling a flow of electron beam to integrate them by means of the same jig. CONSTITUTION:The electrode body 34 for controlling a flow of electron beam and the terminals 35, 35' for applying voltage are separately constituted and also the terminals 35, 35' for applying the voltage are subjected to a chromium oxide processing 36 on their surfaces. Further, the bending 37 is carried out in the inside of an inner wall of the glass envelopes 32, 33 and it is possible to apply the voltage by laser-welding the terminal 35 for applying the voltage which is subjected to the chromium oxide processing 36 and the bending 37 to the electrode body 34 for controlling the flow of electron beam to integrate them. The terminals A35 and B35' for applying the voltage are positioned on the base 40 by contacting the positioning plates 41 to them, and the electrode body 34 for controlling the flow of the electron beam is mounted thereon and a pressure is applied by the bending plate 42 and further the laser-welding portion 43 is welded by the laser 44.

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.

Conventional configurations and problems Conventionally, color television image display devices have mainly been used to display images, but the conventional cathode ray tubes are much longer in depth and thinner than the screen. It was impossible to produce a television receiver of the same size. Recently, EL display elements, plasma display devices, liquid crystal display elements, etc. have been developed as flat display elements, but all of them have problems in terms of brightness, contrast, and color display.
It is insufficient in terms of performance such as faccuracy, and has not been put into practical use. Therefore, we use an electron beam to display the Nonoratelevision image on a flat display device! the law of nature/
The purpose of this is to create a ν position that can be decoded by dividing the screen into multiple sections in the vertical direction and deflecting the electron beam vertically into 4σ sections of 1). to display multiple lines, and further divide it into multiple sections in the water/+1 direction to display each molecule υ(L, G, B).
5. Turn on the +7 phosphor in sequence. 1: U(/(shi,
The electron beam to the photoluminescent body of R, G, and BAt
Jj Jl, 1' fii is controlled by -color video IJj to display a television image as a whole. The conventional image display element is the first
As shown in the figure, in order from the rear to the front, a back electrode 1, a line cathode 2 as an electron beam source,
Vertical deflection electrode iii<3, 3', vertical deflection electrode 4,
The structure includes an electron beam flow control electrode 6, a horizontal focusing electrode 6, a horizontal deflection electrode 7, an electron beam accelerating electrode 8, and a glass container 9.22, and the components are housed in the glass container and evacuated. . Line cathode 2 as electron beam source
is stretched in the horizontal direction so as to generate an electron beam distributed linearly in the horizontal direction, and a plurality of such linear cathodes 2 are arranged vertically at appropriate intervals (here, 2A to 2-4).
(Only books shown) provided. In this example, 11
It is assumed that there are 15, and the number is 24 to 2. These wire cathodes 2 are constructed by applying an oxide cathode material to the surface of a tungsten wire having a diameter of 10 to 20 μm, for example. Then, as will be described later, the electron beams are controlled to be emitted sequentially from the three line cathodes 2a for a certain period of time.

The back main frame 1 creates a gradient of about 'tL with a vertical focusing electrode 3 to be described later, and prevents electron beams from other line cathodes 2 other than the line cathode 2 which is controlled to emit electron beams for a certain period of time as described above. This function suppresses the generation of electron beams and pushes out the generated electron beams only in the forward direction. This back electrode 1
may be formed by a coating of electrically conductive material firmly adhered to the inner surface of the rear wall of the glass bulb. However, instead of the back electrode 1 and the linear cathode 2, a planar electron beam emitting cathode may be used. The vertical focusing electrode 3 has a conductive plate 11 having a horizontally long slit 10 facing each of the line cathodes 2A to 2Y, and extracts the electron beam emitted from the line cathode 2 through the slit 10, and directs the electron beam in the vertical direction. focus on. Surin) 10ir: i) 1 may be provided with crosspieces at appropriate intervals in the middle, or rL1 may be a large number of through holes lined up at small intervals in the horizontal direction (the interval between the culm JW in contact with the culm). The actual T1 may be configured as a slit. The same applies to the vertical focusing electrode 3'.

It is something. Vertical deflection electrodes 4 (r [, 1, notation s') are individually arranged IKt in the middle position 11'1'' of each of the throats 10 in the horizontal direction. '' - The conductors 13 and 13' are provided on the surface and the bottom surface.
A vertical deflection voltage is applied between the 1t' tubes 13 and 13' to deflect the electron beam in the vertical direction. In this configuration example, the electron beam from one line cathode 2 is deflected to a position corresponding to 16 lines in the vertical direction by a pair of conductors 13 and 13'. The 16 vertical deflection electrodes 4 constitute 16 pairs of conductors corresponding to each of the 16 line cathodes 2, and ultimately deflect the electron beam to draw 240 horizontal lines on the screen 21. do. Next, the control electrode 6 has slits 14, each of which is long in the vertical direction. A plurality of conductive plates 16 are arranged horizontally at predetermined intervals. In this configuration example, 320 control electrode conductive plates 15a to 15n are provided (
(Only 10 lines are shown in the figure). This control electrode 5 (dl
Each divides the electron beam in the direction of water 517 into one picture element and extracts it, and controls the amount of the electron beam passing in accordance with the video signal for displaying each picture element. Therefore,
Control, if 320 electrodes 5 are provided, 3 per horizontal line.
20 picture elements can be displayed. In addition, in order to display images in color, each picture element is displayed with phosphors of three colors, R, G, and B, and each control electrode 6 has phosphors of R, G, and B.
G and B video signals are sequentially added. In addition, 320 sets of video signals for one line are simultaneously applied to the 320 control electrodes 6, and the video for one line 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) facing the slit 14 of the pole 5, each of which is divided horizontally. The 11 photon beams for each picture element are each focused in one direction on the water 117 to form a fine electron beam. The horizontal deflection electrode 7 is composed of a plurality of conductive plates 18 arranged vertically in the middle of each of the slits 1. Apply pressure 11 and apply 7 pictures each; 11.9 bodies
"l'i next light and emit light": let it shine. The deflection range is the width of one pixel for each electron beam 4rJ in this embodiment. The acceleration electrode 8 is the same as the vertical deflection electrode 4〉
A plurality of conductors 11 are provided horizontally at a position of 1.
It is composed of L-rays 19 and accelerates the electric beam with sufficient energy so that it collides with the screen 21.

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

The phosphor 2Q is arranged at R for one slit 14 of the control electrode 5, that is, for each one horizontally divided electron beam.

One pair each of three color phosphors, G and B, are provided and are applied in stripes in the vertical direction. In FIG. 1, the broken lines drawn on the screen 21 indicate divisions in the vertical direction corresponding to each of the plurality of line cathodes 2, and the two-dot chain lines correspond to each of the plurality of control electrodes 6. This shows the division in the water 1' direction that is displayed. As shown in the enlarged view in Figure 2, there is one section partitioned by these two areas.
In the horizontal direction, there are R, G, and B phosphors 20 for one picture element, and in the vertical direction, there are l16i ffi for 16 lines. Note that in the figure, A is one section in the vertical direction, and B is one section in the horizontal direction. The size of one section is, for example, 1 mm in the horizontal direction and 16 mm in the vertical direction. I'd like to see how it's drawn in such a pleasingly stretched out way. In this embodiment, only one pair of R, G, and B phosphors 20 are provided for one control electrode 6, or one 1L beam, for one picture element. Of course, even if two or more picture elements are provided, [, ku, in that case, t;1 control electrode 5 has two or more picture elements! Kome R,G.

B video signals are sequentially added, and at the same time 1υj, horizontal deflection is performed. The following 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 screen 21 is spaced from the back electrode 1 to the coupling spacer 23 at a constant interval of 1: -, , 1) and is positioned in the inner direction of the screen 21. -The state is fixed at 4'l l/7/after this, glass: fr
r! : The picture f7J is stored inside the display device 0. Completeness 1
1 Ru. Here, 'ltN 41 between the electrodes is defined as the in-plane direction (
The positioning is done with positioning holes 24 precisely drilled in each of the electrodes 1, 2, 3, 4, 6, and 6.7, the electron beam source holding 1' stage, and the accelerating electrode holding means (both not shown). This is done by a positioning pin 25 passing through the positioning hole 24 in common. When fixing each electrode, due to the manufacturing process, divide the horizontal deflection electrode from the electron beam flow control electrode into several units, and after fixing the units,
A method of fixing unit comrades is adopted.

This is because the electron/electron beam flow control electrode unit and the horizontal deflection electrode unit constitute electrical electrodes, 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. However, these patterns have extremely small slit widths and extremely thin plate thicknesses, making it difficult to fix them by firing in a divided state. These components are housed in a glass container).It is necessary to prepare terminals for applying voltage to the product, but as shown in Fig. 4, electron beam flow control for applying voltage has conventionally been carried out. 'The terminal portion 26 of the city pole 5 is exposed to the outside of the glass container 9, 22, and voltage application is now possible. In addition, for the other plurality of electrodes, the side terminal (not shown) and the plurality of electrodes are connected with a wire, and the edge of the side terminal is brought out of the glass container at a position different from the terminal portion 26. This makes it possible to apply voltage.

Here, the electron beam flow control electrodes can be connected with wires in the same way as the other electrodes, but since high voltage is applied to the electron beam flow control electrode 5, it is recommended to use thin wires for the wire connections. is the inner 1, so it would be better to use a thick wire, but since the electron beam flow control electrode 5 is extremely thin, the terminal will bend when connected to the thick wire, and the other 1
/, H-7 or t, j, there is a risk of contacting the putter 7 and causing the 7-yel-, so by using a thick line, the inner wall of the glass container must necessarily be made larger f'L & Otherwise, the entire F-image display device 1'1° cannot be made smaller and lighter. Father, control electrode ☆ 1111 child 261 glass container 9, 22 in the fall, glued and fixed via J'l j'fnrinote and published. 11.1 Child 26 is handled Jl, l (life/j
15. When fixing with adhesive, the thermal expansion X causes a centripetal force to be applied to the electrode, and the control electrode terminal 26 is cut 1θ1, so that no force is applied to the electrode. 4:, 11 can be +-1, and 4: is bad. father,
The electrode surface V (&1, A9) is covered with wood, and since the electrode is sealed with a glass container through an adhesive frit, the adhesion between the electrode surface and the adhesive frit is poor and leakage occurs from this adhesive part. However, it had many drawbacks, such as the inability to obtain stable images.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides the control electrode 11i and the pressure application terminal separately from the electrode body, and further provides a chromium oxide treatment on the surface of the voltage application terminal to improve adhesion. By providing a bent portion in a part of the terminal, the stress upon arrival is absorbed by the bent portion to provide an image display device with high reliability and stable image quality. The power 1=141 is the force θ for welding the electrode body and the laser with the applied terminal in a state where it has been bent.

Structure of the Invention The present invention is characterized in that the voltage application terminal of the electron beam flow control electrode is provided separately from the electrode body, and that a portion of the terminal that brings the voltage application terminal inside the inner wall of the glass container is curved. At the same time, the electron beam flow control electrode body and the voltage application terminal are welded using a laser using the same jig. In addition, the surface of the voltage application terminal is treated with chromium oxide, and the second structure bends the stress caused by the difference in thermal expansion of the fixing 114 when it is adhesively fixed in a glass container via an adhesive frit. Absorb with 1fIS and get 'dL
It is possible to prevent bending or cutting of the voltage application terminal, and the surface treatment improves the adhesion strength between the adhesive frit and the voltage application terminal to prevent leakage, making the electron beam flow control flj pole reliable. Since it is possible to perform inexpensive bending and welding that does not require a high amount of work and man-hours, it is possible to create an image display device that can achieve 1/1 long-term stability of images.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Figures 5 and 6NQV show a method of manufacturing an electrode according to an embodiment of the present invention, in which 111 tons of phosphor 31 are removed from cathode 3Q, and the removed components are glass containers 32, 33 and adhesive frits. They are vacuum sealed via 38. The electron beam flow terminal body 34 and the voltage application terminals 35, 35' are constructed separately, and the voltage application terminals 35, 36' have a surface treated with chromium oxide 36. Furthermore, a bending process 37 is performed inside the inner wall 1 of the glass container 32, 33, and this chromium oxide treatment 36 and bending process 37 are applied to the voltage application terminal 36.
By performing laser welding to integrate the electrode body 34 and the electron beam flow control electrode body 34, voltage application becomes possible. The joining during this laser welding is possible regardless of which of the electron beam flow control electrode main body 34 and the voltage application terminals 35 and 35' is joined together. Further, laser welding can be carried out either by welding the electron beam flow control electrode alone or by welding the electrode as a unit.

In FIG. 6, the voltage application terminals A, 35 and B35' are positioned on the base 40 and placed against the brace 41,
The electron beam flow control electrode 34 is placed on top of this, and the voltage application terminals A35 and B3 are connected by positioning pins (not shown).
5'. After that, the bending plate 42 applies pressure to the voltage application terminal A3.
6 and 35' are bent by 4J19, the bent voltage application terminals 35 and 36' are positioned with the electron beam flow control electrode 34 and identified by the bending plate 42, and a laser welding portion 43 is welded by the laser 44.

The drawing shows a 2-head laser, but 1 head has 2 lasers.
Even if the laser is used twice, the welding is still the same.

By this laser welding, the electron beam flow control electrode and 'lh
: Pressure applied Kawaken 1 is integrated. Also for electric moon application ☆:! t
： 'T't, 1,] 1 where round bending is being performed
゜Effects of the Invention As described above, chemical formula 11 of the present invention applies river group 1□1rA and B
At the same time, apply a bending force of 1 and 11, and after bending 4J, use the electric r-beam flow control electrode as the electrode.
and 41j to become one body.''
Since there is no negative effect on the electrode pattern, the image quality is better, and since it is treated with chromium oxide, there is no need to worry about leakage, and the image quality is stable for a long time.1. ``Rinou and Ishi'' were able to supply the I/C with an inexpensive image display device with high reliability.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing the basic configuration of an image display element used in an image display device, Fig. 2 is an enlarged view of the screen, Fig. 3 is an exploded perspective view of the electrode during the manufacturing process, and Fig. 4 6 is a cross-sectional view of a conventional electron beam flow control electrode, FIG. 6 is a cross-sectional view of an image display device according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view of the process of forming a voltage application terminal. 2.3o... cathode, 21.31... phosphor, 9°22.32.33... glass container,
5.34...Electron beam flow control electrode, 26,3
5.35'... Voltage application terminal, 37...
...Bending part, 43... Laser welding part. Name of agent: Patent attorney Toshio Nakao and 1 other person
2 Figure

Claims (1)

[Claims] An image display device in which multiple electrodes are provided between the cathode and the phosphor □, these are fired and fixed with adhesive frits, and after being inserted into a glass container, they are sealed on the top and bottom of the glass container via adhesive frits. As mentioned above, in the electrode, the electron beam flow control electrode and the voltage application terminal are separated, and the voltage application terminal is bent using the same jig and welded to the electron beam flow control electrode. A method for manufacturing an image display device.