JPS61118933A - Manufacture of picture display device - Google Patents

Abstract

PURPOSE:To make a system of a stable picture image and a longer service life, by placing devices from the screen to the vertical focusing electrode in a separate container, connecting plural electrodes and the side terminal, inserting a getter etc., and welding the sealing sheets outside the containers at a normal temperature. CONSTITUTION:While sealing sheets 30 and 32 are preliminarily attached and fixed to glass containers C29 and B31 repectively, devices from the screen to the vertical focusing electrode 38 are placed in a glass container A36, and then, the glass container B31 under which the sealing sheet 32 is fixed is located and placed thereon. The plural electrodes except the electron beam control electrode 39 are connected to the side terminal 41, and a voltage is applied to them. Then, in the integrated containers A and B, are inserted a cathode 42, a rearside electrode 43, and a getter 44, and then, the container C29 under which the sheet 30 is attached and fixed is located and placed on the containers A and B. After that, the sealing sheets 32 and 30 outside the containers B31 and C29 are welded 51 at a normal temperature to complete the sealing.

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 their problems Traditionally, cathode ray tubes have been mainly used as display elements for displaying images on color televisions, but conventional cathode ray tubes are very long in depth and thin compared to the screen. It was impossible to produce a television receiver.

In addition, although EL display elements, plasma display devices, liquid crystal display elements, etc. have recently been developed as flat display elements, all of them are insufficient in terms of performance such as brightness, contrast, and color reproducibility of color display. , it 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, and we divided the screen vertically into multiple sections. The electron beam is deflected vertically for each section to display multiple lines, and is further divided horizontally into multiple sections to display R, G,
The phosphors such as B are made to emit light sequentially, and the R and G phosphors are made to emit light sequentially.

A television image is displayed as a whole by controlling the amount of electron beam irradiation on the phosphors such as B by a color image signal. The conventional image display device 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,
A vertical focusing electrode 3゜3', a vertical deflection electrode 4, an electron beam flow control electrode 5, a horizontal focusing electrode 6, a horizontal deflection electrode 7, a horizontal focusing electrode 6', an electron beam accelerating electrode 8 and a glass container 9゜22 are arranged. 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 with a linear button distribution in the horizontal direction. So 2i~2
(Only four of the two are shown). In this embodiment, it is assumed that 15 pieces are provided, and 2I to 2Y are provided.

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 upper line cathode 2a for a fixed period of time. The back electrode 1 suppresses the generation of electron beams from line cathodes 2 other than the line cathode 2 that is controlled to emit electron beams for a certain period of time, which will be described later, and directs the generated electron beams only in the forward direction. It has the effect of pushing out toward the target. The back electrode 1 may be formed by a coating film of a conductive material adhered to the inner surface of the back wall of the glass pulp.

Further, instead of the back electrode 1 and the linear cathode 2, a planar electron beam emitting cathode may be used. Vertical focusing electrode 3
is a conductive plate 11 having horizontally long slits 1o facing each of the line cathodes 2a to 2y; the electron beam emitted from the line cathode 2 is taken out through the slits 1o, and is focused in the vertical direction. let The slits 10 may be provided with crosspieces at appropriate intervals in the middle, or at small intervals in the horizontal direction (nearly touching each other).
It may be configured as a substantial slit with a row of through holes provided at one interval). The vertical focusing electrode 3' is also similar. A plurality of vertical deflection electrodes 4 are arranged horizontally at intermediate positions between 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 things. And the conductors 13, 13 facing each other
A vertical deflection voltage is applied between ' and deflects 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 correspond to the 16 line cathodes 2, respectively.
A pair of conductors is formed, and eventually two conductor pairs are formed on the screen 21.
The electron beam is deflected to draw 40 horizontal lines. Next, the electron beam flow control electrodes 5 are each composed of conductive plates 15 having vertically long slits 14, and a plurality of them are arranged in parallel in the horizontal direction at predetermined intervals. In this configuration example, 320 control electrode conductive plates 15a~
15n (only 1° is shown in the figure). Each of the electron beam flow control electrodes 5 extracts the electron beam horizontally by dividing it into one picture element at a time, and controls the amount of electron beam passing therethrough in accordance with the video signal for displaying each picture element. Therefore, if 32,020 electron beam flow control electrodes 5 are provided, 320 picture elements can be displayed per horizontal line. In addition, in order to display images in color, each picture element is displayed using three-color phosphors, R, G, and B, and each electron beam flow control electrode 6 is provided with the R, G, and B phosphors.
Each video signal of B is added sequentially. Furthermore, 320 sets of video signals for one line are simultaneously applied to the 320 electron beam flow control electrodes 5, so that one line of video is displayed at one time.

The horizontal focusing electrode 6 is the slit 1 of the electron beam flow control electrode 6.
It consists of a conductive plate 17 having a plurality of slits 16 (320 slits) and a vertical deflection electrode facing away from the vertical deflection electrode 4, which horizontally focuses the electron beams of each pixel divided horizontally into a fine beam. Make it into an electron beam. The horizontal deflection electrode 7 is made up of a plurality of conductive plates 18 arranged vertically in the middle of each of the slits 16, and a horizontal deflection voltage is applied between each conductive plate 18 for each pixel. The electron beams are respectively deflected in the horizontal direction, and the R, G, and B phosphors are sequentially irradiated on the screen 21 to cause them to emit light. In this embodiment, the deflection range is a width of Vc1 picture element for each electron beam. The accelerating electrode 8 is composed of a plurality of conductive wires 19 provided horizontally at the same position as the vertical deflection electrode 4, and accelerates the electron beam so that it collides with the screen 21 with sufficient energy.

The screen 21 is constructed by coating the back surface of the 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 20 has one phosphor of three colors R, G, and B for each slit 14 of the electron beam flow control electrode 50, that is, for each one electron beam divided in the horizontal direction.
They are provided in pairs and are applied vertically in stripes. In FIG. 1, the broken lines drawn on the screen 21 indicate 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 each of the plurality of electron beam flow control electrodes 6. Shows the horizontal divisions displayed corresponding to. As shown in Fig. 2, one picture element's worth of R and G is horizontally divided into one section partitioned by these two.

There is a B phosphor 20, which has a width of 16 lines in the vertical direction. In addition, A in the figure is one division in the vertical direction,
B is one section in the horizontal direction. The size of one section is
For example, the horizontal direction is 11! II.

There are 16 chickens in the vertical direction. Note that in FIG. 1, the length in the horizontal direction is greatly enlarged relative to the length in the vertical direction for clarity. In addition, in this embodiment, only one pair of R, G, and B phosphors 2o is provided for one picture element for one electron beam flow control electrode 5, that is, for one electron beam. Of course, more than one picture element may be provided, and in that case, the electron beam flow control electrode 5 has R9G for two or more picture elements.
, B video signals are sequentially applied, and horizontal deflection is performed in synchronization with them. 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 in-plane direction of the electrodes by a coupling spacer 23 made of a metal material, and then housed in a glass container to display an image. The device is completed. Here, the positioning in the electrode in-plane direction between the electrodes is 1 + 2 +
3 + 3' + 4 + 5. Each electrode of 8.7, electron beam source holding means, accelerating electrode holding means (both not shown)
Positioning hole 24 and positioning hole 24 drilled with high precision
This is done by a positioning pin 261C that passes through both.

When fixing each electrode, due to the manufacturing process, a method is adopted in which the area from the electron beam flow control electrode to the horizontal deflection electrode is divided into several units, each of which is fixed, and then the units are fixed together. . This is because the electron beam flow control 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, since these patterns have extremely small slit widths and extremely thin plate thicknesses, it is difficult to bake and fix them in a divided state. Therefore, the electron beam flow control electrode and the horizontal deflection electrode are usually baked and fixed to form a unit, and then the electrode pattern is divided by a method such as a laser.

These components housed in a glass container must be connected to terminals for applying voltage, but conventionally they are integrated with an electron beam flow control electrode for applying voltage, as shown in Figure 4. The terminal portion 26 that has become
2, and voltage can now be applied. In addition, for other plural electrodes, connect the side terminal (not shown) and the plurality of electrodes with wire buttons, and connect a part of the side terminal,
By bringing it out of the glass container at a position different from the terminal portion 26, voltage application becomes possible. Here, glass containers 9, 2
A cathode and a plurality of electrodes are housed within the 2.

After the components such as the screen are inserted into the container, they are sealed to the glass containers 9 and 22 via the adhesive frit 28 by subjecting them to a heat cycle of 450° C. for 1 hour. after that,
Make the inside of the container a high vacuum of 10-7 to 10 Torr,
An image is displayed by applying a predetermined voltage to each component. However, if there is gas generated from the component materials stored in these containers, the degree of vacuum will not increase, resulting in unstable image display and shortened lifespan.For this reason, conventional CRT There is a method of adsorbing the generated gas using a barium getter, which is often used in display devices such as . This is a heat-generating barium getter (B a AJ! 4 alloy with Ni
(containing powder) 27, and this getter 2
When No. 7 is heated by applying a direct current to 800'C, an exothermic reaction between Af and Ni occurs and the temperature rises to 1000-1100°C, generating Ba, which adsorbs the gas generated from the component materials and creates a vacuum inside the container. I was trying not to let it get worse.

However, if a conventional glass container is coated with an adhesive frit and sealed by applying a heat cycle, the heat during sealing will reduce the emission of the cathode 2, which is a component, and the emission from the getter 27. The degree of vacuum inside the container decreases due to the gas, which causes the image display to become unstable for a long time.
Moreover, it had drawbacks such as a shortened lifespan.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides an image display device that prevents deterioration of the emittance of the cathode, which is a component housed in a glass container, and prevents gas generated from the getter, thereby providing stable image display over a long period of time and having a long life. This is what we are trying to provide.

Structure of the Invention The present invention is based on a method in which a thin sealing plate treated with chromium oxide is fixed in advance to a divided glass container C using an adhesive slit in order to prevent a decrease in the cathode emission of the components inserted into the container and to prevent gases generated from the getter. Furthermore, the other divided glass containers BK are also fixed in advance with a thin sealing plate treated with chromium oxide using 7 adhesives.

After that, insert everything from the screen to the vertical focusing electrode into the glass container A, and connect the side terminals that are voltage application terminals.
After positioning the glass container AK, place the glass container B on which the chromium oxide treated thin sealing plate is fixed and heat it at 450°C.
Glass container A and glass container B become one by applying a heat cycle of hr. At this time, the side terminals serving as voltage application terminals and the terminal portions of the electron beam flow control electrodes are located between the glass containers A and B, with a portion thereof being exposed outside the glass container. A cathode, a back electrode, and a getter are further inserted into the integrated glass containers A and BK, and then the glass container C to which the thin sealing plate is fixed is positioned and mounted. After the glass containers B and C are placed, the thin sealing plates protruding from the glass containers B and C are sealed by welding at room temperature.

The above configuration allows sealing at room temperature, making it easy to handle, and since no electric furnace or the like is used, the number of man-hours can be reduced. In addition, since no heat is applied to the cathode and getter, a decrease in cathode emission is prevented, resulting in uneven brightness of the image, and there is no gas generated from the getter, which has the unique effect of extending the life of the image display.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 5 to 9 show an image display device according to an embodiment of the present invention. As shown in FIG.
0 is fixed in advance with an adhesive frit 34. Further, a thin sealing plate 32 treated with chromium oxide is also fixed in advance to the glass container B31. At this time, the thin sealing plates 3Q and 32 are provided with holes 3 in the adhesive frit coated areas of the glass containers C29 and Ba1.
3 and a hole in the sealing thin plate 30 (not shown), and when subjected to a heat cycle of 450°C for 1 hour, the adhesion free 7
)34.50 is the hole 33 and the sealing thin plate 3 (not shown)
K is formed so as to pass through the hole 0 and firmly fix the thin sealing plate 30, 32.

In the drawing, the holes are round, but oval or rectangular holes are also fine. In short, any hole is sufficient as long as it is a hole through which the adhesive frit passes. Also, the holes may be in one row or in multiple rows. Furthermore, after fixing the thin sealing plate 32 to the unfixed part of the thin sealing plate 32 of the glass container B31, the adhesive frit 3 is attached.
Apply 5.

As described above, the thin sealing plates 30 and 32 are adhesively fixed to the glass containers C29 and Ba1 in advance, and as shown in FIG. 6, after inserting the parts from the screen 37 to the vertical focusing electrode 38 into the glass container A36, The glass container B31 to which the thin sealing plate 32 is fixed is positioned and placed. At this time, the glass-sealed portion of the electron beam flow control electrode 39 forms a slit-shaped terminal portion 40 . Also, the side terminal 41 is also positioned at this time, and after positioning and placing the glass container B31,
By applying a heat cycle of 60°C for 1 hour, the glass containers Aae and B31 are fixed and integrated, and at the same time, the terminal portion 4 of the electron beam flow control electrode 39, which is a voltage application terminal,
o and the side terminal 41 are in a state where a portion is exposed outside the glass container between the glass containers A3e and B31. Thereafter, voltage can be applied to a plurality of electrodes other than the electron beam flow control electrode 39 by connecting them to the side terminals 41 with wires. Thereafter, a cathode 42, a back electrode 43, and a getter 44 are further inserted into the integrated glass containers A and B as shown in FIG. C29
Position and place. After the glass containers B31 and C29 are placed, the thin sealing plates 32 and 30 protruding from the outside of the glass containers B31 and C29 are welded 61 at room temperature, thereby completing the sealing as shown in FIG. After that, the inside of the container was heated at 1o ~ 10-8 using a vacuum pump through a tip tube attached to the container in advance.
After creating a high vacuum of Torr, the tube is sealed and an image can be displayed by applying a predetermined voltage to each component. Further, the above-mentioned welding can also be performed by sealing the entire device in a vacuum.

At this time, the tube becomes unnecessary, and there is no need to worry about breaking the tube during handling. FIG. 9 is an exploded perspective view for explaining the embodiment.

Also, vertical focusing 3 from the screen 37 to the glass container A3s
After inserting up to 8, position the side terminals 41, apply adhesive 7 lithoto on the top and bottom surfaces of the glass container B31, and position and place the sealing thin plate 32 on the top surface of the glass container B31. Place at 450℃ for 1 hour
After a thermal cycle of
The same effect can also be obtained by simultaneously bonding and fixing the glass container 029 to which the thin sealing plates 3o have been fixed in advance, and then welding the thin sealing plates together.

In addition to the effects of the invention, according to the present invention, a button-divided glass container is inserted from the component screen to the vertical focusing electrode, and after the terminal part and side terminal of the electron beam flow control electrode in the electrode are treated with chromium oxide, A thin sealing plate treated with chromium oxide is fixed in advance to each of a plurality of other glass containers, an adhesive slit is applied to one of the glass containers, and an adhesive slit is applied to one of the glass containers. It is placed on a glass container into which the vertical focusing electrode is inserted, and fixed with an adhesive frit to form a single unit. Then, the plurality of electrodes and the side terminals are connected. Thereafter, the cathode, back electrode, and getter are inserted, and the glass container to which the thin sealing plate is adhesively fixed is positioned and placed. After placing the glass container, the sealing thin plates protruding from the glass container are welded together at room temperature to complete the sealing.

With the above configuration, sealing is possible at room temperature,
It is easy to handle, does not require an electric furnace, and does not require time to raise and lower the temperature, reducing man-hours and reducing costs.

Further, since heat is not applied to the cathode and getter, a decrease in cathode emission can be prevented and uneven brightness will not occur on the image. Furthermore, there is no gas generated from the getter, the image display becomes stable, the lifespan becomes longer, and highly reliable image display devices can be supplied in large quantities, and the practical effects are outstanding.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of an image display element used in an image display device, Figure 2 is an enlarged plan view of a screen, Figure 3 is an exploded perspective view of an electrode manufacturing method, and Figure 4 is a conventional electron beam flow control. A cross-sectional view of electrode sealing, FIG. 6 is a cross-sectional view of fixing the container in an embodiment of the present invention, FIG. 6 is a cross-sectional view after fixing the container,
FIG. 7 is a sectional view showing fixation of separate containers, FIG. 8 is a sectional view showing welding and sealing of thin sealing plates, and FIG. 9 is an exploded perspective view of the whole. 1.43... Back electrode, 21.37...
・Screen, 3, 38... Vertical focusing electrode, 9
,22,29゜31.36...Glass container, 4
1...Side terminal, 30.32...Thin plate for sealing, 28, 34, 35. 50... 7 adhesive holes, 61... Welded portion, 33... Hole in thin plate for sealing. Name of agent: Patent attorney Toshio Nakao and 1 other person 1 to 2 Figure 3

Claims (2)

[Claims] (1) Inserting components such as a vertical focusing electrode, a plurality of electrodes, and a screen of an image display device having a plurality of electrodes between a back electrode and a screen into a divided first glass container;
After positioning the chromium oxide-treated side terminals and the terminal portion of the electron beam flow control electrode, the chromium oxide-treated thin sealing plates were adhesively fixed to the divided second and third glass containers. A method for manufacturing an image display device, in which two glass containers are adhesively fixed to form an integral body, and the thin sealing plates of the second and third glass containers are welded together outside the glass containers. (2) A method for manufacturing an image display device according to claim 1, wherein the thin sealing plate is provided with a hole in a portion to be bonded to the glass container.