JPS60211736A - Manufacture of image display device - Google Patents

Abstract

PURPOSE:To remove the dispersion of horizontal deflection sensitivity and thereby to obtain a reliable image display device, by bonding and fixing a horizontal deflecting electrode, which is formed to have continuous bridges in horizontal direction, precisely to the other electrode and thereafter, cutting said bridges. CONSTITUTION:The bond, applied to the surface of a spacer 23 made of insulator, is heated upto the temperature of molting and recrystallization and then a horizontal deflecting electrode 22, the spacer 23 and a horizontal focusing electrode 24 are fixed by bonding, by applying pressure to them with a burning jig made of a plate having flatness. After fixing by bonding, bridges 25 continuous in the horizontal direction of the horizontal deflecting electrode are cut and thus vertical conductive plates 22a, 22b, 22c,...,22n are separated electrically.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates in particular to electrodes of flat 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.

Recently, EL display elements and plasma display devices are 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, 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 on the screen vertically into multiple sections. In each case, the electron beam is vertically deflected to display multiple lines, and then it is divided horizontally into multiple sections and R, G, B, etc. phosphors are sequentially emitted in each section. , that R,G.

A television image is displayed as a whole by controlling the amount of electron beam irradiation onto a phosphor such as B using a color video signal.

As shown in FIGS. 1 and 2, the conventional image display element has a back electrode 1.
Line cathode 2° vertical focusing electrode 3.3' as electron beam source
, vertical deflection electrode 4. Electron beam flow control electrode 6. Horizontal focusing electrode 6. A horizontal deflection electrode 7, an electron beam accelerating electrode 8, and a glass container 9 are arranged, 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. So 2
Only four (A-22 are shown) are provided. In the example shown in FIG. These wire cathodes 2 are constructed by coating the surface of a tungsten wire with a diameter of 10 to 2 μΦ with an oxide cathode material, 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 creates a potential gradient with a vertical focusing electrode 3, which will be described later, and suppresses generation of 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. It also functions to push out the generated electron beam only in the forward direction. The back electrode 1 may be formed by a coating film of a conductive material coated on 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. The vertical focusing type @3 is a conductive plate 11 having horizontally long slits 10 facing each of the line cathodes @2i to 2yo, and takes out the electron beam emitted from the line cathode 2 through the slits 1o, and Focus vertically.

The slits 10 may be provided with crosspieces at appropriate intervals in the middle, or may be substantially a row of through holes arranged horizontally at small intervals (nearly touching intervals). It may also be configured as a slit. The vertical focusing electrode 3' is also similar. A plurality of vertical deflection electrodes 4 are arranged horizontally at intermediate positions of each of the above-mentioned sulins 10, and conductors 13 and 13' are provided on the upper and lower surfaces of the insulating substrate 12, respectively. It is configured. And the opposing conductors 13°13'
A vertical deflection voltage is applied between them to deflect the electron beam in the vertical direction.

In this configuration example, the - example conductor 13.13'
The electron beam from the book line cathode 2 is vertically deflected to a position corresponding to 16 lines. And 16 vertical deflection electrodes 4
Thus, 16 pairs of conductors corresponding to each of the 16 wire cathodes 2 are constructed.

In the end, the electron beam is deflected so as to draw 240 horizontal lines on the screen 9. Next, the control electrical layer 6 is composed of a plurality of electrical conductors 15 each having a vertically long slit 14, and a plurality of electrical conductors 15 are arranged in parallel in the horizontal direction at predetermined intervals. In this configuration example, 320 control electrode conductive plates 15a to 15n are provided (only 10 are shown in the figure). Each of the control electrodes 5 extracts the electron beam by dividing it into one picture element in the horizontal direction, and controls the amount of electron beam passing therethrough in accordance with the video signal for displaying each picture element.

Therefore, if 32,020 control electrodes 6 are provided, 320 picture elements can be displayed in one horizontal line.

In addition, in order to display images in color, each picture element is R9G, B
Display is performed using phosphors of three colors, and the R, G, and B video signals are sequentially applied to each control electrode 6. Also 32
320 sets of video signals for one line are simultaneously applied to the zero control electrodes 6, and the video for one line is displayed at one time. The horizontal focusing electrode 6 has a plurality of vertically long (320) slits 1 facing the slits 14 of the control electrode 6.
The electron beam is composed of a conductive plate 17 having a conductive plate 17 having a conductive plate 17, and focuses electron beams for each picture element divided horizontally into a narrow 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 RlG and B phosphors are sequentially irradiated on the screen 9 to cause them to emit light. 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 plates 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 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 thin metal bank layer (not shown).

The phosphors 20 are provided with one pair of phosphors of three colors R9G and B for each slit 14 of the control electrode 6, that is, for each horizontally divided electron beam. It is applied in vertical stripes. The broken lines drawn on the screen 9 in FIG. 2 indicate vertical divisions 9 corresponding to the plurality of line cathodes 2.
a, and the two-dot chain line indicates a horizontal section 9b displayed corresponding to each of the plurality of control electrodes 6. As shown in an enlarged view in FIG. 2, one section partitioned by these two has R, G, and B phosphors 20 for one picture element in the horizontal direction, and 16 lines in the vertical direction. It has a width of

The size of one section is, for example, 1 mm in the horizontal direction,
There are 16 cylinders in the vertical direction.

Note that in FIG. 1, the length in the horizontal direction is drawn much larger than the length in the vertical direction for the sake of clarity.

In addition, in this embodiment, only one pair of R, G, and B phosphors 2Q is provided for one picture element for one control electrode 6, that is, for one electron beam, but for two or more picture elements, Of course, the control electrode 6 may be provided with R and G electrodes for two or more picture elements.

A B video signal is sequentially applied, and horizontal deflection is performed in synchronization with the B video signal. However, in the above configuration, when the horizontal deflection electrode 7 is bonded and fixed to the horizontal focusing electrode 6 via a spacer made of an insulator, the horizontal deflection electrode 7 is inserted between each of the slits 16 provided in the horizontal focusing electrode 6. Consisting of a plurality of conductive electrodes 18 arranged vertically at the position,
The conductive plates are separated, and a conductive plate 18 and a conductive plate 1 face each other on both sides of the slit 16 through which the electron beam passes.
8' is bonded and fixed to the horizontal focusing electrode 6 at different positions with respect to the arrow Z direction, resulting in variations in horizontal deflection sensitivity, poor landing precision of the electron beam on the screen 9, and causing partial color unevenness. was.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides a horizontal deflection electrode with a horizontally continuous crosspiece, and after accurately joining and fixing it to another electrode on the back electrode side or the screen side, the horizontal deflection electrode is By cutting continuous bars, variations in horizontal deflection sensitivity are eliminated, and a highly reliable image display device is provided.

Structure of the Invention The present invention comprises a back electrode, a line cathode as an electron beam source, a vertical focusing electrode, a vertical deflection electrode, an electron beam flow control electrode, a horizontal focusing electrode, a horizontal deflection electrode, an electron beam accelerating electrode, and a screen plate, These are housed in a vacuum inside a flat glass pulp, and the horizontal deflection electrode is shaped to have a continuous bar in the horizontal direction. After bonding and fixing, the horizontally continuous crosspiece of the horizontal deflection electrode is cut and the horizontal deflection electrode is electrically divided in the horizontal direction to eliminate local color unevenness and obtain a very beautiful screen. It has the effect of being

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows the shape of the horizontal deflection electrode and the method of bonding and fixing it to other electrodes on the back electrode side or the screen plate side in one embodiment of the present invention. In one embodiment of the present invention, a case is shown in which a horizontal deflection electrode and a horizontal focusing electrode on the back electrode side are bonded and fixed. In FIG. 3, reference numeral 22 denotes a horizontal deflection electrode which is bonded and fixed to a horizontal focusing electrode 24 on the back electrode side via a spacer 23 made of an insulator. When bonding and fixing, the bonding material applied to the surface of the spacer 23 made of an insulator is heated to the temperature of melting and recrystallization, and a flat surface is formed from the horizontal focusing electrode side to the horizontal deflection electrode side and from the horizontal deflection electrode side to the horizontal focusing electrode side. The horizontal deflection electrode 22 is pressed with a firing jig made of a tempered plate material. Spacer 2
The three horizontal focusing electrode members 24 are bonded and fixed. in this case,
The horizontal deflection electrode 22 is reinforced by a horizontally continuous crosspiece 25, and a thin plate 26 with a surface roughness of Rmax 1 μm or less is inserted between the horizontal focusing electrode 24 and the firing jig. Pressure is applied according to the surface roughness, and the joint is fixed. For this purpose, vertical conductive plates 22a, 22b forming the horizontal deflection electrode 22.

For 22C2..., 22n, the variation in position accuracy in the direction of arrow Z is 5 μm or less. The horizontally continuous crosspiece 26 is cut to form a vertical conductive plate 22a.

22b, 22c, . . . , 22n are electrically separated and serve as horizontal deflection electrodes.

A horizontal deflection electrode 28 having a horizontally continuous crosspiece 27 as shown in FIG. 4 and a horizontal deflection electrode 30 having a horizontally discontinuous crosspiece 29 as shown in FIG. 5 are used. Figure 6 shows the results of an experiment in which the surface roughness of the thin plate inserted between the tool and the water laser deflection electrode was changed and the horizontal focusing electrode was fixed.

In the case of a horizontal deflection electrode that has horizontally continuous bars (X in the figure), when a thin plate of Rrnax11Jxn or less is bonded and fixed for experiment, the horizontal deflection electrode conductive plate Z direction position accuracy is 6 μm or less without local color unevenness. I got the result that. Further, in the case of a horizontal deflection electrode having discontinuous bars in the horizontal direction (Y in the figure), even if a thin plate with Rmaxo of 6 μm is used, the Z-direction positional accuracy of the horizontal deflection electrode conductive plate will not be less than 5 μm.

Effects of the Invention - By using the horizontal deflection electrode of the present invention as shown in F and improving the positional accuracy of the horizontal deflection electrode conductive plate in the Z direction,
It has become possible to eliminate variations in horizontal deflection sensitivity and provide a highly reliable flat image display device.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the basic configuration of an image display element used in a conventional image display device, FIG. 2 is an explanatory diagram of a screen, and FIG. 3 is an exploded perspective view of an embodiment of a horizontal deflection electrode.
Figure 4 is a plan view of a horizontal deflection electrode with horizontally continuous bars, Figure 6 is a plan view of a horizontal deflection electrode with horizontally discontinuous bars, and Figure 6 shows the surface roughness of the thin plate and the horizontal deflection. It is a figure which shows the relationship of the Z direction positional accuracy of an electrode conductive plate. 1... Back electrode, 2... Line cathode, 6,
24... Horizontal focusing electrode, 7, 22...
Horizontal deflection electrode, 26... thin plate. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 4 Figure 5 ■ Figure 6

Claims (2)

[Claims] (1) It is equipped with a back electrode, a line cathode as an electron beam source, a vertical focusing electrode, a vertical deflection electrode, an electron beam flow control electrode, a horizontal focusing electrode, a horizontal deflection electrode, an electron beam accelerating electrode, and a screen plate. After being housed in the vacuum of a glass bulb, the horizontal deflection electrode is shaped to have a horizontally continuous crosspiece, and is bonded and fixed to another electrode on the back electrode side or the screen plate side via a spacer made of an insulating material. . A method of manufacturing an image display device, in which a horizontally continuous crosspiece of the horizontal deflection electrode is cut to electrically divide the horizontal deflection electrode in the horizontal direction. (2) When a horizontal deflection electrode having a horizontally continuous crosspiece is bonded and fixed to another electrode on the back electrode side or on the screen plate side via a spacer made of an insulating material, the horizontal deflection electrode is 2. The method of manufacturing an image display device according to claim 1, wherein a thin plate having a surface roughness of Rfnax 1 μm or less is brought into close contact with the opposite side of the spacer.