JPS58150248A - Discharge display - Google Patents

Abstract

PURPOSE:To enlarge the electrode area of a cathode defined by an insulative barrier while simultaneously prevent the contamination of the cathode electrode, by forming an insulative barrier group from the anode side substrate. CONSTITUTION:At first the conductive paste which will be the anode electrodes x1, x2, x3,... are screen printed in parallel on a substrate 2. Then an insulative paste which will be the first layer of the insulative barriers g1, g2, g3,... is screen printed while partially lapped over the anode electrodes x1, x2, x3,... and dried, thereafter the insulative paste is lamination printed to predetermined height while repeating the printing and the drying sequentially. For the screen printing of the insulative barrier, the printing screen is shifted relatively against the substrate 2 such that the insulative barrier will partially lap over the anode electrode, and a glass paste is printed as the insulative paste inplace of the conductive paste. Thereafter it is thermally processed and the anode electrodes x1, x2, x3,... and the insulative barriers g1, g2, g3,... are burnt simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a discharge display device, in particular, to a discharge display device in which an anode electrode and a cathode electrode of a pair of discharge electrodes are formed by a group of parallel electrodes arranged in parallel in the row direction and the column direction. The present invention relates to a so-called DC discharge matrix display device in which groups of electrodes face each other with an interval of 'Fgr, and display is performed by discharge light emission at mutually opposing intersections of the respective electrodes of both electrode groups.

In this type of DC discharge matrix display device, as shown in FIGS. 1 and 2, a flat tube body (1) is constructed of two substrates (2) and (3) each made of, for example, a glass plate. . One of these substrates (2) and (3), substrate (2) in the figure, is made of a glass substrate with optical transparency, and both substrates (2) and (3) are placed facing each other. The periphery is sealed with, for example, a glass frit (4) to create a flat space (
5) is formed. This space (5) is filled with rare gas.

On the inner surface of one substrate (3), a plurality of parallel electrodes y1. y2. An electrode group Y serving as a cathode, in which y3 . . . is arranged, is deposited. On the other hand, an insulating barrier group G is formed on the substrate (3) on which the electrode group Y is formed.

This insulating barrier group G is connected to each electrode YI of the cathode electrode group Y.
A plurality of insulating barriers gx + formed with required intervals and widths orthogonally crossing J2+Y3...
g2 + g3... It is composed of: The heights of these insulating barriers gl+g2+g3... are selected in accordance with the spacing between the two substrates (2) and (3).

The other substrate (2) is provided with parallel electrodes x1, . X2. x3
An anode electrode group X in which . . . is arranged is deposited and formed.

The cathode electrode group Y and the anode electrode group X are formed by screen printing, and Ni paste is used as the conductive paste in this case. In addition, the cathode electrode terminal (6) led out to the outside and the anode electrode terminal (6) are also formed by the screen printing method, but the conductive paste at this time is compatible with the glass flint (4) (i.e., the glass frit (4)). 4) Ag paste is used.

In this way, each anode electrode X1 of the anode electrode group
．． x2. X3... is separated by each barrier gl + g2 + g3... of the insulating barrier group G, and the strip spaces (5a) (5b) (5c), respectively.
... and each cathode electrode yt +Y2 +
This is to prevent the glow extending along Y3... from spreading. In this way, for example, an ON potential is sequentially applied to each electrode Y1 +Y2 +Y3... of the cathode electrode group Y in a time-divisional manner, and each 11t pole x1+x2 +x3... of the other anode electrode group X is thus applied. By sequentially or simultaneously applying an on-voltage according to a display signal to each electrode Xl, X2 . X3...yl, y2
+y3 . . . , luminance is emitted depending on the magnitude of the potential difference according to the display signal, and a dot-sequential or line-sequential luminescence image is obtained to perform a desired display.

Usually, an insulating barrier in such a discharge display device is installed from the substrate (3) side on which the cathode electrode is formed in order to reliably prevent the diffusion of plasma glow generated on the cathode electrode side (which can cause erroneous display). It was formed to the required height using a screen printing method or the like. As a result, the cathode electrode becomes contaminated with barrier paste, the bottom surface of the insulating barrier spreads due to sagging during printing, and as a result, the cathode electrode area becomes narrower, making it difficult to discharge, and the anode side substrate and cathode side substrate There were problems such as difficulty in positioning when pasting.

The present invention provides a discharge display device that eliminates the above-mentioned drawbacks.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 3 and 4. In this figure, parts corresponding to those in FIGS. 1 and 2 are designated by the same reference numerals, and redundant explanation will be omitted.

In the present invention, as described above, the opposing substrates (two
) and (3), and parallel electrodes X1. x2. X3...
... an anode electrode group X and a direction intersecting this,
For example, a plurality of parallel electrodes Y11y extending in orthogonal directions
A cathode electrode group Y consisting of 2 +V3 . Also in the present invention, an insulating barrier group G is provided to divide the light emitting display section with respect to each electrode of the anode electrode group X.
In particular, in the present invention, the insulating barrier group G is formed on the side where the anode electrode group X is arranged, that is, on the substrate (2), to a required height from this toward the cathode electrode group Y side. In this case, each insulating barrier gt +g2... is an anode electrode x
1. X2. ... so as to cover the required width on the corresponding one side edge. Methods for forming the electrode groups X and Y and the insulating barrier group G include a screen printing method and a so-called lift-off method using a mask. Here, a method of forming the anode electrode X and the insulating barrier G by screen printing will be described.

First, an anode electrode X1. X2. X3・
Screen print the conductive paste in parallel.

As a conductive paste for this electrode, for example, Nosu 9530 (trade name) manufactured by DuPont, ≠2554 (trade name) manufactured by EEL
(trade name) can be used. After this printing, a drying process is performed to dissipate the solvent in the conductive paste. Then, the insulating barrier g1+g2
+g3..., the insulating paste that becomes the first F@ is applied to the anode electrode x1. X2. 3. Print a part of the insulating paste on top of it, dry it, and then repeat printing and drying in order to print a layer of insulating paste to the required height. . During this printing, the viscosity of the insulation paste is such that the lower layer is hard (for example, the viscosity is 700 to 800).
Poise level), the upper layer is soft (e.g. viscosity 400-5
00 poise) is allowed. This prevents the lower layer of the insulating barrier from sagging and makes its top surface smooth, allowing good contact with the surface on which the cathode electrode group Y is arranged. Screen printing of this insulating barrier is done using the same printing screen used earlier to form the anode electrode, and the insulating barrier is attached to the substrate (2) so that it is part of the anode electrode. The printing screen is relatively shifted by a predetermined distance, and an insulating paste, for example +9740 manufactured by DuPont Co., is used in place of the conductive paste.
Print glass paste of (product name). Thereafter, a heat treatment is performed at, for example, 540° C. for 60 minutes, and the anode electrodes X1 +X2 +x3... and the insulating barriers gl +g2 +g3... are fired at the same time.

As described above, according to the discharge display device of the present invention, by forming the insulating barrier group from the anode side substrate, contamination of the cathode electrode is eliminated, and at the same time, the electrode area of the cathode defined by the insulating barrier is also reduced. This spreads and facilitates discharge between the anode and cathode electrodes during driving. In addition, when bonding the cathode side substrate and the anode side substrate, since the insulating barrier group has already been formed on the anode side substrate in the required positional relationship with the anode electrode group, the anode side substrate and the cathode side substrate The alignment between the cathode side substrate and the anode electrode is simple and accurate, and a highly accurate discharge display device can be obtained.

Furthermore, since the pattern of the anode electrode group and the pattern of the insulating barrier can be the same, the same printing screen can be used to form the anode electrode and the insulating barrier, allowing for highly accurate formation.

In the examples shown in FIGS. 3 and 4, the insulating barrier is formed overlapping a part of the anode electrode, so when observing the light emitting display from the anode side, the width of the opening is narrow. A brighter display surface can be obtained compared to the conventional discharge display devices shown in FIGS. 1 and 2.

It is desirable that each display part of the insulating barrier be in contact with the substrate (3) on the opposing cathode side, but there is a gap between the top surface of the insulating barrier and the cathode electrode surface. It was confirmed that glow diffusion does not occur if the distance between the cathode electrode surface and the anode electrode surface is within 20% of the distance between the opposing cathode and anode electrode surfaces.

In the above description, a discharge display device in which an insulating barrier is formed as a part of the anode electrode has been described, but in addition, for example, as shown in FIGS. 1 and 2, an anode electrode group X
The present invention can also be applied to a discharge display device in which an insulating barrier group G is arranged between the insulating barrier group G, and in this case as well, the insulating barrier group G is laminated on the substrate (2) on the anode electrode group X side, and the required By forming the cathode electrodes at a high height, the cathode electrode group Y is free from contamination and the cathode electrode area is expanded, making it easier to discharge.

[Brief explanation of the drawing]

Figure 1 is an enlarged plan view of the main parts of a conventional discharge display device;
1, FIG. 3 is an enlarged plan view of a main part of the discharge display device according to the present invention, and FIG. 4 is a sectional view taken along line AA in FIG. 3. X is an anode electrode group, Xl, X2. X3... is each anode electrode, Y is a cathode electrode group, yl, y2. y
3. Song is each cathode electrode, G is an insulating barrier group, gl
+g21g3... are each insulating barrier. <1 17 χ3−〜−−

Claims (1)

[Claims] an anode electrode group consisting of a plurality of parallel electrodes extending in one direction and facing the anode electrode group with a required spacing therebetween;
a cathode electrode group consisting of a plurality of parallel electrodes extending in a direction intersecting the extension direction of the anode electrode group, and each of the opposing intersections of the anode electrode group and the cathode electrode group is used as a light emitting display portion, In the discharge display device in which the light-emitting display section is divided by an insulating barrier group with respect to each electrode of the anode electrode group, the insulating barrier group extends from a side on which the anode electrode group is arranged toward the cathode electrode group. A discharge display device characterized in that it is formed to a required height.