JPH0131656B2 - - Google Patents

Description

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

This type of DC discharge matrix display device is
As shown in FIGS. 1 and 2, a flat tubular body 1 is constituted by 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 light-transmitting glass substrate, and both substrates 2 and 3 are opposed to each other and their peripheral portions are sealed with, for example, a glass frit 4. A flat space 5 is formed between the two substrates 2 and 3. This space 5 is filled with rare gas.

Then, on the inner surface of one of the substrates 3, a plurality of parallel electrodes y ₁ , y ₂ , y ₃ . . . are arranged with a required width in one direction, for example, in the row direction, with the required constant spacing maintained, and electrodes that serve as cathodes are arranged. Group Y 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 consists of a plurality of insulating barriers g _{1 , g formed with required spacing and width orthogonally across each electrode y 1 ,} y ₂ , y _{3 .} . . of the cathode electrode group Y. ₂ , _g3 ... The heights of these insulating barriers g ₁ , g ₂ , g ₃ . . . are selected in accordance with the spacing between the two substrates 2 and 3.

The other substrate 2 has parallel electrodes x ₁ , x ₂ , x ₃ . . . extending in a direction perpendicular to the direction in which the parallel electrodes y ₁ , y ₂ , y ₃ . An arrayed anode electrode group X 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.
Furthermore, the terminal 7 of the cathode electrode and the terminal 6 of the anode electrode led out to the outside are similarly formed by the screen printing method, but the conductive paste at this time is compatible with the glass frit 4 (that is, it is adhered to the glass frit 4 in an airtight manner). ) Ag paste is used.

In this way, the anode electrodes x ₁ , x ₂ , x _{3 .} . . of the anode electrode group X are separated by the respective barriers g ₁ , g ₂ , g ₃ . 5b, 5c... and each cathode electrode
This is to prevent the glow extending along y ₁ , y ₂ , y ₃ . . . from spreading. In this way, for example, an ON potential is sequentially applied to each electrode y ₁ , y ₂ , y _{3 .} . . of the cathode electrode group Y in a time-sharing manner, and each electrode x ₁ , x ₂ , x ₃ . By sequentially or simultaneously applying an on-voltage according to the display signal to each electrode,
x ₁ , x ₂ , x ₃ ... y ₁ , y ₂ , y ₃ ... to emit luminance depending on the magnitude of the potential difference according to the display signal, and obtain a dot-sequential or line-sequential luminescence image to obtain the desired image. It is designed to be displayed.

Usually, an insulating barrier in such a discharge display device is screen printed 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 according to laws and regulations. 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 the area of the cathode electrode becomes narrow, making it difficult to discharge, and the anode side substrate There were problems such as the difficulty in aligning the cathode side substrate when attaching it.

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 substrates 2 and 3 facing each other are provided, and an anode electrode group consisting of parallel electrodes x ₁ , x ₂ , x ₃ . X and a plurality of parallel electrodes y ₁ extending in a direction crossing this, for example, in a direction perpendicular to this,
A cathode electrode group Y consisting of y ₂ , y ₃ . Also in the present invention, there is an insulating barrier group G that divides 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 at a required height on the side where the anode electrode group X is arranged, that is, on the substrate 2, toward the cathode electrode group Y side. In this case, each of the insulating barriers g ₁ , g _{2 .} . . covers one corresponding edge of the anode electrodes x ₁ , x _{2 .} . . over a required width. Electrode groups X and Y and insulating barrier group G
Formation methods 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, conductive pastes that will become the anode electrodes x ₁ , x ₂ , x ₃ . . . are screen printed in parallel on the substrate 2.
As a conductive paste for this electrode, for example, Ni paste such as #9530 (trade name) manufactured by DuPont and #2554 (trade name) manufactured by ESL can be used. After this printing, a drying process is performed to dissipate the solvent in the conductive paste. Thereafter, an insulating paste that will become the first layer of the insulating barriers g ₁ , g ₂ , g ₃ . . . is screen printed so as to partially overlap the anode electrodes x ₁ , x ₂ , x ₃ . The insulation paste is laminated and printed by sequentially repeating printing and drying to obtain the desired height. During this printing, the viscosity of the insulating paste can be hard for the lower layer (for example, about 700 to 800 poise) and soft for the upper layer (for example, about 400 to 500 poise). 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 performed using the same printing screen used to form the anode electrode earlier, and the insulating barrier is printed onto the substrate 2 so that it partially overlaps the anode electrode. The screen is relatively shifted by a predetermined distance, and an insulating paste, such as #9740 (trade name) manufactured by DuPont, is printed as an insulating paste in place of the conductive paste. Thereafter, a heat treatment is performed at, for example, 540° C. for 60 minutes to simultaneously bake the anode electrodes x ₁ , x ₂ , x ₃ . . . and the insulating barriers g ₁ , g ₂ , g ₃ .

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. Also, when bonding the cathode side substrate and the anode side substrate together,
Since the insulating barrier group has already been deposited on the anode side substrate in the required positional relationship with the anode electrode group, the alignment of the anode side substrate and the cathode side substrate is the same as the alignment of the cathode electrode and the anode electrode. It is possible to obtain a highly accurate discharge display device by simply and accurately.

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 for forming the anode electrode and the insulating barrier.
Can be formed with high precision.

In addition, when an insulating barrier is formed on a conventional cathode side substrate, depressions are periodically formed in the insulating barrier corresponding to the areas where the cathode electrode is not formed, forming an insulating barrier with a uniform height. Can not do it. In contrast, in the present invention, since the insulating barrier is formed only from the anode side substrate, an insulating barrier with a uniform height can be obtained in the direction perpendicular to the cathode electrode group. The barrier facilitates determining the spacing of the discharge spaces.

In the examples of FIGS. 3 and 4, the insulating barrier is formed over a part of the anode electrode, so when observing the luminescent display from the anode side,
The opening width L is increased, compared to the conventional figures 1 and 2.
A brighter display surface can be obtained compared to the discharge display device shown in the figure.

Note that it is desirable that each display part of the insulating barrier be in contact with the substrate 3 on the opposing cathode electrode side, but the gap between the top surface of the insulating barrier and the cathode electrode surface is It was confirmed that glow diffusion does not occur if the distance between the electrode surface and the anode electrode surface is within 20%. The above example describes a discharge display device in which an insulating barrier is formed so as to partially overlap the anode electrode, but in other cases, for example, as shown in FIGS. 1 and 2, an insulating barrier may be formed between the anode electrode group X. The present invention can also be applied to a discharge display device in which the group G is arranged, and in this case as well, by laminating the insulating barrier group G on the substrate 2 on the anode electrode group X side and forming it to a required height, The cathode electrode group Y is free from dirt and the area of the cathode is expanded, making it easier to discharge.

[Brief explanation of drawings]

FIG. 1 is an enlarged plan view of the main parts of a conventional discharge display device, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG.
The figure is an enlarged plan view of essential parts of the discharge display device according to the present invention, and FIG. 4 is a sectional view taken along line A--A in FIG. 3. X is an anode electrode group, x ₁ , x ₂ , x ₃ ... are each anode electrode, Y is a cathode electrode group, y ₁ , y ₂ , y ₃ ...
are each cathode electrode, G is an insulating barrier group, g ₁ ,
g ₂ , g ₃ ... are each insulating barrier.

Claims (1)

[Claims] 1 An anode electrode group consisting of a plurality of parallel electrodes extending in one direction, and a plurality of parallel electrodes facing the anode electrode group with a required interval and extending in a direction intersecting the extension direction of the anode electrode group. a cathode electrode group, each of the opposing crossing portions of the electrodes of the anode electrode group and the cathode electrode group is a light emitting display portion, and the light emitting display portion is substantially parallel to each electrode of the anode electrode group. In a discharge display device divided by a group of insulating barriers, the group of insulating barriers spans a required width on a corresponding one side edge of each anode electrode only from the side on which the anode electrode group is arranged. Covering this, and facing the cathode electrode group side, the distance between the top surface of the insulating barrier and the cathode electrode surface is formed at a height within 20% of the distance between the opposing cathode electrode surface and anode electrode surface. A discharge display device characterized by: