JPH02121243A - Image displaying device - Google Patents

Abstract

PURPOSE:To obtain good electron beam characteristics at a low cost by providing an electrode consisting of at least two grid-like electrode parts each having cuts partially and insulated from each other electrically forming almost a single plane when these electrodes are combined. CONSTITUTION:A horizontal deflection electrode 16 is composed of a first horizontal electrode 16A and a second horizontal deflection electrode 16B and each has bars 16C and cuts 16D. The bar 16C is thinner than the plate thickness of the horizontal deflection electrode 16, and the cuts 16D are processed to have a depth to keep a distance durable to potential difference applied between both electrodes 16A, 16B without contact of the bars when the first horizontal deflection electrode 16A and the second horizontal deflection electrode are laminated. Thus processed first horizontal deflection electrode 16A and the second horizontal deflection electrode 16B are laminated in the same plane for the front part and back part of the electrodes. Because the adjacent electrode parts are insulated from each other and in the same plane, a symmetrical electric field can be obtained to electron beams, thereby good electron beam characteristics can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flat image display device used in color television receivers, computer terminal displays, and the like.

2. Description of the Related Art As an example of the prior art, a flat cathode ray image display device is disclosed in Japanese Patent Application No. 55-147221. The structure and manufacturing method of the electrode structure will be explained with reference to FIG.

A linear electron beam is extracted from a linear cathode 12 made of an oxide cathode, this electron beam passes through an electron beam extraction electrode 13, and a signal voltage is applied at an electron beam control electrode 14 to control the passage of the electron beam. Control quantity. The electron beam that has passed through the focusing electrode 15 is deflected by a vertical deflection electrode 17 and a horizontal deflection electrode 16, respectively, and collides with an accelerating electrode plate 18 coated with a fluorescent material to emit light, thereby displaying an image. In such a structure, the electron beam control electrode 14 and the horizontal deflection electrode 16 form strip-shaped electrodes, and since each metal piece is very thin, uneven pitch accuracy and deflection at the intermediate portion are likely to occur. Therefore, each of these picture electrodes is manufactured as follows. First, a 42-6 alloy plate (42% Ni, 6% Cr, 52% Fe) with a plate thickness of 02 is placed between metals spaced apart from each other as shown in the electron beam control electrode 14 and horizontal deflection electrode 16 in FIG. Connection part 4 with three or more pieces
At 8.49, etch the interconnected shapes. Then, holes 42A, 44A, 45 are formed in the electron beam extraction electrode 13, the focusing electrode 15, and the vertical deflection electrode 17 at positions corresponding to the connecting portions 48 and 49, respectively.
A hole is made by etching or the like. Then, an electron beam extraction electrode 13, a focusing electrode 15, and a vertical deflection electrode 17
Frit glass is applied to the surface of each of the surfaces except for the vicinity of the electron beam passage hole to a height of about 0.2 to 0.311, and the temperature is raised to vitrify and fix it. Furthermore, apply frit glass as an adhesive to a thickness of about 0.2111, and apply the electron beam extraction electrode 13, the electron beam control electrode 14, the focusing electrode 15, the vertical deflection electrode 17, and the horizontal electrode in the order shown in FIG. By arranging the deflection electrodes 16 and heating them to about 450° C. by applying pressure from above and below, a mutually insulated and integrated electrode structure is created. This is then exposed to the hole 42 using a laser beam or electron beam with a beam diameter of approximately
When irradiating through A, 44A, and 45A, the connection part 48.4
9 is cut, and the adjacent metal pieces are electrically insulated from each other to produce a strip-shaped electrode.

As another conventional example, a deflection electrode is disclosed in Japanese Patent Application No. 56-205470. Its configuration and operation will be explained with reference to FIG. The electrodes 51 and 52 of the pair of deflection electrodes are etched in the same shape and stacked with the through holes shifted in position. By applying the deflection voltage separately to each of the electrodes 51 and 52, the electron beam 53
Deflection is possible as shown in .

Problems to be Solved by the Invention However, in the first conventional example, good characteristics can be expected because the strip-shaped electrode can be processed with high precision and an electric field symmetrical to the electron beam can be obtained, but cutting with a laser beam etc. There is a problem that manufacturing becomes complicated and expensive because it is necessary to install equipment and additional cutting steps are required.

In addition, in the second conventional example, there is no need to install a cutting device using a laser beam or the like, and there is no need to create a new cutting process. Regarding the beam, there is a problem in that the through holes of the deflection electrodes are misaligned, resulting in an asymmetric electric field, which adversely affects the spot diameter and the linearity of deflection.

The present invention solves the problems of the conventional example, and aims to provide a flat panel image display device that is inexpensive and has good electron beam characteristics.

Means for Solving the Problems The technical means of the present invention for solving the above problems is that there are two electrode parts made by etching a metal plate, each having a crosspiece thinner than the thickness of the metal plate and a crosspiece. It has deeper cuts, and when two electrode plates are stacked on top of each other, they are insulated from each other and are on the same surface, making them appear as if they were one electrode plate.

Operation According to the present invention, by using the above-mentioned technical means, adjacent electrode parts are insulated and are on the same plane, so that a symmetrical electric field can be obtained with respect to the electron beam, and high-quality electron beam characteristics can be obtained. Further, the manufacturing process of the electrodes is simplified as only etching is required.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 is an enlarged perspective view of a flat panel image display device according to an embodiment of the present invention. In the figure, a linear electron beam is extracted by setting the back electrode 11, the linear cathode 12, and the electron beam extraction electrode 13 to appropriate potentials.
This electron beam passes through an electron beam extraction electrode 13, and a signal voltage is applied by an electron beam control electrode 14 to control the amount of electron beam passing. The electron beam that has passed through the focusing electrode 15 is deflected by a horizontal deflection electrode 16 and a vertical deflection electrode 17, respectively, and is then deflected by an accelerating electrode plate 1 coated with a phosphor.
The image is displayed by colliding with and emitting light at 8.

The horizontal deflection electrode of the flat panel image display device having the above structure will be explained in more detail. FIG. 2 is an enlarged perspective view of a part of the horizontal deflection electrode 16 shown in FIG.
) and (b) are perspective views of the same in two parts. As can be seen from FIGS. 2 and 3, the horizontal deflection electrode 16 in FIG. , crosspiece 16
It has C and notch 16D. Note that the first horizontal deflection electrode section 16 and the second horizontal deflection electrode 16B are also crosspieces, and together with the crosspiece 16C, they form a lattice as a whole.

The crosspiece 16C is thinner than the plate thickness of the horizontal deflection electrode 16, and
The cutout 16D is used to maintain a distance sufficient to withstand the potential difference applied between the picture electrodes 16A and 16B without the crosspieces touching when the first horizontal deflection electrode 16A and the second horizontal deflection electrode 16B are stacked. A metal plate is processed, for example, by etching, so that it has a depth of . Although the first horizontal deflection electrode 16A and the second horizontal deflection electrode 16B in FIG. 3 appear to have different shapes at first glance, the second horizontal deflection electrode 16B is turned over and the crosspieces 16C are shifted by half the distance between the crosspieces. It is also possible to use the same etched original plate, since it does not overlap the first horizontal deflection electrode 16A at all. The first horizontal deflection electrode 16A and the second horizontal deflection electrode 1 processed in this way
6B can be laminated on the same surface on both the front and rear sides (both the front and back sides) of the electrode, as shown in FIG. Note that in each grid, the spacing between the bars in one direction may be different from the spacing between the bars in the other direction.

As for fixing the electrodes, it is possible to create an integrated electrode structure by setting them using frit glass as in the conventional example. In such a configuration of the present invention, by applying a deflection voltage to the first horizontal deflection electrode 16A and the second horizontal deflection electrode 16B, it is possible to perform bilaterally symmetrical deflection, and the spot characteristics can be improved not only in the center but also in the central part. Since the symmetry with respect to the central axis is maintained even during deflection, good quality characteristics can be obtained.

Although the above description has been made using a horizontal deflection electrode as an example, it is possible to apply the above configuration to a vertical deflection electrode.

In addition, in FIG. 3, the entire crosspiece 16C is connected to the horizontal deflection electrode 1.
The thickness of the first horizontal deflection electrode 1 is smaller than that of the first horizontal deflection electrode 1.
It is sufficient to make only the portion where the second horizontal deflection electrode 6A and the second horizontal deflection electrode 16B intersect thin.

Effects of the Invention With the above-described configuration, the present invention manufactures each pair of strip-shaped electrode pieces of the deflection electrode by further performing mechanical or chemical processing after each electrode is bonded and fixed as in the conventional method. This is a flat panel image display device that requires no unnecessary steps, uses a very simple process, is extremely inexpensive, and has good electron beam characteristics.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a flat panel image display device according to an embodiment of the present invention, FIGS. 2 and 3 are perspective views of horizontal deflection electrodes in the same embodiment, and FIGS. 1 is a diagram showing a conventional example. 12... Linear cathode, 14... Electron beam control electrode, 16... Horizontal deflection electrode, 18... Accelerating electrode plate. Figure 1 Name of agent Patent attorney Shigetaka Awano and 1 other Figure / 6AM + Water 4m direction v& / Figure 3 (Q) Calculation 5 Figure

Claims (4)

[Claims] (1) It has at least two lattice-shaped electrode parts, each of which has a partial notch, and when these electrodes are overlapped, they are electrically insulated from each other and have substantially the same plane. 1. A flat-plate image display device characterized by: (2) The flat panel image display device according to claim 1, wherein the grids of the two electrode portions are arranged at equal intervals. (3) The flat image display device according to claim 1, wherein at least a part of the bars in one direction of the grid-like electrode portion is thinner than the bars in the other direction. (4) The flat image display device according to claim 1, wherein the spacing between the bars in one direction is different from the spacing between the bars in the other direction.