JPS63195939A - Electrodes for image display - Google Patents

Abstract

PURPOSE:To enable composition of an electrode block with comparatively a few man-hours and costs and to prevent the electrodes from being flexed due to variations of temperatures by forming splits on ribbonshaped thin metallic plates or rods and combining the metallic plates or reds to be formed into a lattice or spring cam shape in accordance with the splits. CONSTITUTION:Fifteen of horizontally positioned metallic plates 21 of e.g., 1 mm in thickness are disposed in the vertical direction, and two hundreds of metallic ribbons 22 of e.g., 0.2 mm in thickness are combined in a lattice shape in the horizontal direction at right angles with the metallic plates 21 so that an electrode block is composed. A method for this combination is realized with good precision as follows: after splits 21a and 22a are formed on the metallic plates 21 and the metallic ribbons 22, respectively, the plates 21 are made to engage with the ribbons 22 by the use of these splits 21a and 22a. Thus, this electrode block becomes hard to be mechanically flexed. Further, when this electrode block is used in combination with the other flat type electrode, the electrode block is hard to be changed due to temperature and time lapse, and quality of the screen is little deteriorated due to variations in temperature and time lapse.

Description

[Detailed description of the invention] Fields of use for Dosuue The present invention relates to the structure of electrodes of flat panel display devices.

BACKGROUND OF THE INVENTION First, the configuration of a flat display device to which the present invention is applied will be briefly described. An outline of the flat display device is shown in FIGS. 3 to 7. In FIG. 3, 1 is a phosphor surface, 2 is a cathode, 3 is a coupling spacer, and 4 is an electrode. The electron beam emitted from the cathode 2 is horizontally and vertically deflected and intensity-modulated by various electrodes 4, and reaches the phosphor surface 1, causing it to emit light.

The electrode 4 can be classified into an electrode 6 that is rigid in the direction of the arrow X as shown in FIG. 4 and an electrode 6 that is not rigid as shown in FIG. 6 depending on its performance. Each electrode is insulated and fixed at a predetermined distance through a spacer 7 coated with glass and coated with a bonding frit as shown in FIG.

As shown in FIG. 7, this firing method involves inserting a spacer 11 on a firing jig 8 between an electrode 9 that is rigid in the direction of the arrow X and an electrode 1o that is not rigid in the direction of the arrow X. ,
The respective positions are determined using the pins 12, and the elongation adjustment spacer 13 is placed adjacent to the electrode 10, which has no rigidity in the direction of the arrow X, and pressure is applied from the direction of the arrow Z with the stamper 14 to form an adhesive applied to the surface of the spacer 11. The spacer 11 and the electrodes 9 and 1o are joined by heating to the melting temperature of the frit.

Reference numeral 16 denotes a sheet for deep layering the firing jig 8 and the stun/knee 14. The electrode 9, which is rigid in the direction of arrow X during firing, is made of the material 42 in the direction of arrow X.
-6 alloy expands according to the coefficient of thermal expansion, but type 10, which has no rigidity in the direction of arrow X, hardly expands in the direction of arrow X. Therefore, after the firing is completed, a positional shift occurs in the X direction between the electrode 9 which is rigid in the direction of the arrow X and the electrode 10 which is not rigid in the direction of the arrow X. As a measure to prevent this positional shift, the elongation adjusting spacer 13 is placed adjacent to the electrode 10 which is not rigid in the direction of the arrow X, and when the elongation adjusting spacer 13 is heated and thermally expanded, The electrode 10 is expanded in the X direction by frictional force. By such a mechanism, the positions of the electrode 9 that is rigid in the X direction and the electrode 10 that is not rigid in the X direction are aligned in the X direction. Therefore, the amount of thermal expansion of the electrode 10, which has no rigidity in the direction of the arrow X, is related to the amount of thermal expansion of the elongation adjustment spacer 13.
It is necessary to adjust the thermal expansion coefficient of 3 to a predetermined value. In this method, as shown in FIG. 8, a glass layer 17 is formed on the surface of the 42-6 alloy material 16, and by adjusting the thickness of the glass layer 17, the coefficient of thermal expansion of the elongation adjusting spacer is set to a predetermined value. .

Problems to be Solved by the InventionAn electrode block (a stack of multiple plate-shaped electrodes with insulating spacers sandwiched between them) constructed using the method described above is susceptible to temperature changes due to the difference in thermal expansion coefficient between the insulating spacers and the plate-shaped electrodes. As a result, distortion occurs in the electron lens system, making it difficult to compensate for uniform image quality when the electrode block is used in an image display device.

The present invention provides a plate-like electrode for an image display device, which allows an electrode block to be constructed with relatively few man-hours and costs, and which does not warp even when the temperature changes.

Means for Solving the Problems The present invention constructs an electrode by making cuts in a thin ribbon-shaped metal plate or metal rod and combining the metal rods or metal plates in a grid or honeycomb shape according to the cuts. .

According to the present invention, it is possible to construct a lightweight electrode that is mechanically strong and does not easily bend, so it is possible to compensate for the mechanical accuracy of the electrode itself against changes over time such as temperature changes, and also to prevent bending due to changes in temperature or changes over time. It is possible to mechanically fix electrodes that are prone to
It is possible to provide an image display device with no loss in quality.

EXAMPLE An example of the present invention will be described below with reference to FIGS. 1 and 2.

For example, 16 metal plates 21 with a thickness of 1 mm are arranged in the vertical direction, and 2 metal ribbons 22 with a thickness of 0.2 mm, for example, are placed in the horizontal direction so as to be perpendicular to the metal plates 21.
An electrode is constructed by combining 00 sheets in a grid pattern. The completed electrode is shown in Figure 2.

The combination is such that cuts 21a and 22a are provided on the metal plate 21 and the metal rib/22, and these cuts 21a
, 22a can be realized with high accuracy by combining the metal plate 21 and the metal ribbon 22.

Such electrodes can be used, for example, in
No. (Japanese Unexamined Patent Publication No. 57-135590), when the screen on the screen is divided into a plurality of sections in the vertical direction, an electron beam is generated for each section, and each electron beam is generated for each section. It can be used as a deflection electrode or a focusing electrode of a flat panel image display device that displays a plurality of lines by vertically deflecting the film and displays a television image as a whole.

Effects of the Invention As described above, the electrode according to the present invention is mechanically difficult to bend due to its structure, so when used in combination with other plate-shaped electrodes, temperature changes and changes over time occur. An image display device with less deterioration in image quality due to changes or changes over time can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of an electrode for an image display device according to an embodiment of the present invention, FIG. 2 is a perspective view of a completed electrode, FIG. 3 is a schematic side view of a flat display device, and FIGS. Fig. 6 is a plan view of the electrode, Fig. 6 is a plan view of the spacer, Fig. 7 is a sectional view for explaining the electrode firing method, and Fig. 8 is a sectional view showing an example of the configuration of a conventional electrode. be. 21...Metal plate, 22...Metal ribbon, 2
1a. 22a...notch. Name of agent Patent attorney Toshio Nakao 01 Riki\1 person Figure 3 Figure 4 □ × Figure 5 □ × 1 Go to C

Claims (1)

[Claims] An electrode for an image display device constructed by combining metal rods or metal ribbons vertically and horizontally in a lattice shape or a honeycomb shape.