JPS61243485A - Fixing of planar electrode - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for fixing flat plate electrodes used in flat plate displays and the like.

Conventional technology The conventional method of constructing a flat display is to assemble flat electrodes on a frame made of insulators such as Macor or ceramic. In order to prevent distortion and deflection of the electrode due to differences in expansion coefficient, as shown in Fig. 3, a fixing hole 2, which serves as a complete fixing point, is provided at one corner of the flat electrode 1 that does not affect the screen. Assuming a straight line passing through 2, an elongated hole 3 having a degree of freedom in the direction of the straight line is provided, and the flat plate electrode 1 is fixed with two or more positioning holes 2 and 3.

Problems to be Solved by the Invention According to the fixing method as described above, it is possible to prevent the occurrence of positional deviation on the fixed point side, but the positional deviation increases as the distance from the fixed point increases. Since the fixed point is located outside the effective screen 4, if the above fixing method is followed, a positional shift will occur across the entire screen, and the positional shift on the side away from the fixed point cannot be ignored.

Means for Solving the Problem In order to solve this problem, the present invention assumes two or more straight lines, generally two diagonal lines, that intersect near the center of the flat plate electrode, and calculates the distance between each diagonal line. Elongated holes having a degree of freedom only in the diagonal direction are provided at positions corresponding to the four corners, and the flat plate electrode is fixed by the four elongated holes.

Effect With this configuration, when the flat electrode expands with respect to the frame due to thermal expansion, a positional shift occurs with the intersection of two diagonals as a fixed point. At this time, since the center of one screen becomes a fixed point, it is possible to prevent the occurrence of positional shift at the center of the screen. Furthermore, since the magnitude of positional deviation is proportional to the distance from the fixed point, if the fixed point is located at the center of one screen, the maximum value of positional deviation on the screen is reduced to about 172.

EXAMPLE An example of the present invention will be described below based on the drawings. 1st
In the figure, 11 is a flat plate electrode, and this flat plate electrode 11 has an effective screen 1 corresponding to the four corners of its two diagonals -12 and 12.
An elongated hole 14 having a degree of freedom only in the diagonal line 12 and directions other than the four corners is provided. Therefore, the flat electrode 11 has no degree of freedom in directions other than the direction of the diagonal line 12.

FIG. 2 shows how three flat electrodes 11 are assembled on the insulating frame 15, and the pins 17 that engage with the fixing holes 16 provided at the four corners of the insulating frame 15 are inserted into the elongated holes of the flat electrode 11. The flat electrode 11 is attached to the insulating frame 15 by being fixed in the fixing hole 16 via the fixing hole 14. Therefore,
When the flat electrode 11 expands relative to the insulating frame 15 due to thermal expansion, the intersection point 18 of the two diagonal lines shown in FIG. This can be prevented, and the maximum value of positional deviation on the screen can be reduced to about 1/2 compared to the conventional example.

Effects of the Invention According to the present invention, since the center of the screen becomes the fixed point, it is possible to prevent the occurrence of positional deviation at the center of the screen, and furthermore, since the magnitude of the positional deviation is proportional to the distance from the fixed point,
The maximum value of positional deviation on the uniformity can also be reduced.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the principle of an embodiment of the present invention, Fig. 2 is an exploded perspective view illustrating a flat electrode fixing method in an embodiment of the present invention, and Fig. 3 is a plan view showing a conventional fixing method. It is a figure for explaining. DESCRIPTION OF SYMBOLS 11... Flat plate electrode, 12... Diagonal line, 13... Effective screen, 14... Elongated hole, 15... Insulating frame, 16...
...Fixing hole, 17...Pin agent Morimoto
Yoshihiro" tt-=y-1 Figure 3

Claims (1)

[Claims] 1. Assuming two or more straight lines that intersect near the center of the flat electrode, each straight line should have a degree of freedom in its direction, but not in other directions. A method of fixing a flat plate electrode through two or more long holes for positioning provided on the flat plate electrode.