JPH06139924A - Manufacture of picture image display device - Google Patents

Abstract

PURPOSE:To realize a picture image display device in which an image of good quality can be realized by forming a constitution in which problems of position deflection, fall-out, etc., of ceramic spacers between electrodes are dissolved to keep the electrodes at a constant interval. CONSTITUTION:In forming an electrode unit 29, adhesive glasses 4 are set on an electrode 8, when ceramic spacers 2 are disposed at four corners of each electrode to set the electrodes composing the electrode unit 29 at a constant interval, and a press frit 1 is set inside each ceramic spacer 2 correctly to it. The other electrode is then put, and a weight of metal or ceramic having a favorable plane degree is put for loading weight so as to form the electrode unit 29. By thus forming the unit, the electrodes in the electrode unit 29 are set to be at a constant interval, and deterioration of image quality can be prevented, thereby a picture image display device to reproduce an image of good quality can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an image display device in video equipment.

[0002]

2. Description of the Related Art Heretofore, a cathode ray tube has been mainly used as a color television image display element. However, a cathode ray tube has a very large depth as compared with a screen, and it is not possible to manufacture a thin television receiver. It was possible.
Therefore, EL display elements, plasma display elements, liquid crystal display elements, etc. have been developed as flat panel display elements, but they are all insufficient in terms of performance such as brightness, contrast and color reproducibility. Therefore, for the purpose of displaying a high-quality image similar to that of a cathode-ray tube on a flat panel device using an electronic beam, the screen on the screen is divided into matrix-shaped sections without any gaps, and each section is divided. This is an image display device for forming a color television image as a whole by deflecting and scanning an electronic beam to cause a phosphor to emit light. An example of the above-described conventional image display device will be described below with reference to the drawings.

First, FIG. 6 is an exploded perspective view of an image display device. In FIG. 6, 6 is a back electrode, 7a, 7b and 7d are line cathodes as an electron beam source, 8 is an electron beam extraction electrode, 9 is a signal electrode, 10 is a first focusing electrode, and 11 is an electrode. The second focusing electrodes 12a and 12b are horizontal deflection electrodes 13a and 13b.
B is a vertical deflection electrode, and these components are housed in a glass front container 14 and a back container 33, and the inside of the container is evacuated.

The line cathodes 7 a to 7 d are horizontally stretched so as to generate an electron flow having a substantially uniform current density distribution in the horizontal direction, and a plurality of line cathodes 7 a to 7 d are provided in the vertical direction at appropriate intervals. ing. These line cathodes 7a to 7d are formed by coating an oxide cathode material on the surface of a tungsten wire, for example.

The back electrode 6 is made of a flat plate-shaped conductive material and is provided in parallel with the line cathodes 7a to 7d.

The extraction electrode 8 is opposed to the back electrode 6 through the line cathodes 7a to 7d, and has a row of through holes 15 provided at appropriate intervals in the horizontal direction on a horizontal line facing each line cathode. Consists of. Here, the through hole 15 is circular in the embodiment, but may be elliptical or rectangular, or may be slit-shaped like the extraction electrode of the embodiment.

The signal electrode 9 is composed of a plurality of vertically elongated conductive plates 17 arranged at predetermined positions horizontally facing each other in each of the through holes 15 in the extraction electrode 8, and each conductive plate 17 is arranged in parallel. Reference numeral 17 has a similar through hole 16 at a position facing the through hole 15 of the extraction electrode 8. The shape of the through hole 16 may be an ellipse or a rectangle, and like the signal electrode 9, it may be an elongated slit shape in the vertical direction.

The first focusing electrode 10 is made of a conductive plate having through holes 18 at positions facing the through holes 16 of the signal electrode 9. The shape of the through hole 18 may be circular, elliptical, or slit-shaped. The second focusing electrode 11 is the first focusing electrode 1
There are slit holes 19 vertically connected at positions opposite to the 0 through holes 18. The shape of the slit hole 19 may be a round hole, an ellipse, or a rectangular shape, like the through hole 18 of the first focusing electrode 10.

The horizontal deflection electrodes 12a and 12b are composed of two conductive plates 21 and 22 which are connected to each other at appropriate intervals on the same plane by comb-shaped end portions which are meshed with each other. Space 2 created between 12 a and 12 b
0 is opposed to the through slit hole 19 of the second focusing electrode 11.

The vertical deflection electrodes 13 a and 13 b are 23 and 2, respectively.
As shown in FIG. 4, a conductive plate connected at its ends, that is, two comb-teeth-shaped conductive plates are meshed with each other on the same plane with an appropriate gap therebetween. For example, an electronic beam 25
On the other hand, the lower conductive plate 23 and the upper conductive plate 24 form a pair of vertical deflection electrodes.

The screen 26 is formed by applying a phosphor 27, which emits light when irradiated with an electron beam, to the inner surface of the front container 14 and adding a metal back layer (not shown) thereon. In addition, the extraction electrode 8, the signal electrode 9, the focusing electrodes 10 and 11, and the horizontal deflection electrodes 12 a and 12 described above.
The vertical deflection electrodes 13a and 13b are joined by an insulating adhesive (not shown here) to form an integral electrode unit 29. In addition, the line cathode 7
7 and the electrode unit 29, which is attached to the back electrode 6 at an appropriate interval using an attachment member (not shown), and the electrode unit 29 are fixed to each other by insulation.
Forming 0. In addition, the electrode block 30 is mounted on the fixed base 31 fixed to the rear metal container 1 by, for example, screws 3
1 and the like are provided at appropriate intervals and fixed so as to be parallel to the back container 33.

The operation of the image display device configured as described above will be described. First, the voltage V is applied to the back electrode 6.
_{1. A} voltage V ₂ higher than V ₁ is applied to the extraction electrode 8. Further, by heating the line cathode and applying a suitable voltage V ₀ satisfying V ₁ <V ₀ <V ₂ to the line cathode 7 a while flowing a heater current to facilitate electron emission, the line cathode 7 a The electric field on the surface becomes positive and the electron flow is emitted and accelerated toward the extraction electrode 8. At this time, if a voltage V ₀ such that V ₀ > V ₂ is applied to the line cathode 7a, the electric field on the surface of the line cathode becomes negative and the emission of electrons can be suppressed. Therefore, by individually controlling the voltages of the line cathodes, the electron beam is repeatedly emitted from the upper line cathode 7a in the order of 7b and 7c for a certain period of time, so that each line cathode is horizontally leveled. A sheet-like electron beam having a uniform current density distribution in the direction can be generated. The sheet-like electron beam is horizontally divided into a plurality of holes by the through hole 15 of the next extraction electrode 8 to form a larger number of electron beam rows 25 and the through hole 16 of the signal electrode 9. At this time, if the voltage V ₃ of the signal electrode 9 is V ₃ > V ₀ , the electron beam passes, and if V ₃ <V ₀ , the electron beam gives kinetic energy. You lose and cannot pass. So V ₃
Is controlled with time, the electronic beam passing amount is adjusted individually for each electronic beam according to the video signal for displaying the picture element.

The electron beam passing through the signal electrode 9 next reaches the first focusing electrode 10 and the second focusing electrode 11, and is focused by the electrostatic lens effect of the through hole 18 and the slit hole 19.
After being shaped, the potential difference (referred to as a deflection voltage) applied between the adjacent conductive plates of the horizontal deflection electrodes 12a and 12b and between the adjacent conductive plates 23 and 24 of the vertical deflection electrodes 13a and 13b. Is electrostatically deflected horizontally and vertically by. Furthermore, a high voltage (for example, 10
(KV) is applied, the electron beam is accelerated to high energy and collides with the metal back, causing the phosphor 27 to emit light.

When a high voltage is applied to the metal back layer, a high voltage terminal (not shown here) is used, and this high voltage terminal is heated at a high temperature by an insulating adhesive.
Is attached to.

When a television screen is vertically and horizontally divided into a matrix to form a group of subsections 28, each subsection is associated with one electron beam separated as described above. By deflecting and scanning the beam only within each subsection, the entire screen can be displayed on the screen. Further, by controlling the RGB video signals corresponding to the respective picture elements with the signal electrode voltage over time as described above, a television moving image can be reproduced.

[0016]

However, in the above-mentioned conventional structure, the ceramic spacer for maintaining the distance between the electrodes at an equal interval causes a defect such as a positional shift or a drop between the electrodes, It has a problem of causing deterioration of image quality.

The present invention solves the above-mentioned problems of the prior art. By fixing the ceramic spacers, the electrodes are arranged at equal intervals, the accuracy of the positional relationship between the electrodes is ensured, and high quality is achieved. An object is to provide an image display device that reproduces image quality.

[0018]

In order to achieve this object, the image display device of the present invention has a ceramic spacer inside a ceramic spacer used for maintaining a constant distance between the electrodes during the production of the electrode unit. -Manufactured by inserting a press frit to regulate the position of the service.

[0019]

With this structure, when the electrode unit is completed, the ceramic spacers fixed by the press frit allow the electrodes to be arranged at equal intervals, so that a high quality image can be reproduced without causing deterioration of the image quality. You can

[0020]

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

FIG. 1 is a perspective view of an electrode showing a state of a ceramic spacer press frit of an image display device according to an embodiment of the present invention. Figure 1 shows the electrode unit
Reference numeral 1 is a press frit, 2 is a ceramic spacer, 3 is a beam passage hole, and 4 is an adhesive glass for adhering electrodes together. FIG. 2 is a perspective view of a single press frit.

The production of the electrode unit of the image display device configured as described above will be described with reference to FIG.

First, when preparing the electrode unit, the electrode 8
The adhesive glass 4 is placed on the ceramics spacers 2. At this time, the ceramic spacers 2 are placed at the four corners of each electrode so that the electrodes constituting the electrode unit 29 are evenly spaced, and the press frit 1 is placed inside the ceramic spacers 2. -Place it so that it is exactly aligned with the support 2.

After this, an electrode is further mounted, and in order to load the weight, a metal or ceramic weight having good flatness is placed on the electrode unit 29.
To create.

Although the press frit 1 has a donut shape here, it goes without saying that the same effect can be obtained with a square or polygonal shape. Although the press frit 1 is set to the inside of the ceramic spacer 2, it may be set to the outside.

Although glass is desirable as the material of the press frit 1, it goes without saying that the same effect can be obtained with a heat-resistant adhesive.

[0027]

As described above, according to the present invention, a press frit is provided inside the ceramic spacer used to maintain a constant distance between the electrodes when the electrode unit is formed, for the purpose of regulating the position of the ceramic spacer. By adopting the insertion structure, when the electrode unit is completed, the ceramic spacer is fixed by the press frit, so problems such as misalignment and dropping between the electrodes of the ceramic spacer are solved, and The electrodes are arranged at equal intervals, and it is possible to realize an image display device that reproduces good image quality without causing deterioration of image quality.

[Brief description of drawings]

FIG. 1 is a ceramic space according to an embodiment of the present invention.
Perspective view of the sapres frit

FIG. 2 is a perspective view of a press frit used in the image display device according to the embodiment of the present invention.

FIG. 3 is a perspective view of a ceramic spacer in a conventional image display device.

FIG. 4 is a perspective view showing how the electrodes of the image display device are fired.

FIG. 5 is a sectional view of the image display device.

FIG. 6 is an exploded perspective view of the image display device.

[Explanation of symbols]

 1 Press frit 2 Ceramics spacer 3 Beam passage hole 4 Adhesive glass 5a Firing jig 5b Firing pin

Claims (1)

[Claims] 1. A screen provided with a phosphor and a back electrode formed of a conductive plate facing the screen, the back electrode being provided in a space sandwiched by the back electrode and the screen. In order, in order, a plurality of line cathodes, one or a plurality of extraction electrodes made of a conductive plate, a signal electrode,
Comprises a focusing electrode, a horizontal deflection electrode, and a vertical deflection electrode,
Also, in an image display device provided with a glass front container and a back container for accommodating the screen, the line cathode, and various electrodes in a vacuum state, ceramics used for maintaining each electrode at a constant distance when the electrode unit is formed. A method of manufacturing an image display device, characterized in that a press frit is inserted inside a spacer.