JPS635851B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a gas discharge display panel, so-called plasma display panel, in which electrodes are coated with a dielectric material.

A plasma display panel is used as a display device by disposing electrodes covered with a dielectric material and facing each other, and applying an alternating electric field between these electrodes to discharge gas sealed therein. These are broadly classified into so-called XY dot matrix displays or segment displays, depending on the shape of the opposing electrodes or the structure of the cells formed between the opposing electrodes. The present invention is particularly effective for the latter segment display, and relates to an improvement in the spacer structure for forming a discharge gap.

The segment type display board normally displays numbers from "0" to "9" by selectively emitting light from the 7 segments of the Japanese character.
Display up to. In this case, in one electrode group facing each other, seven Japanese-shaped segments are formed on the same substrate for the number of digits of the display panel, and each single segment is connected to each digit. These are applied on the same substrate by screen printing.

On the other hand, the opposing electrodes are formed on the same substrate as a common electrode so as to cover the entire Japanese character electrodes for each digit. As these common electrodes, transparent electrodes such as Nesa are usually used. Each of these electrodes is coated with a dielectric material, but since the leads connecting each single segment of the sun-shaped electrode are placed on the same plane of the opposing substrate, these leads are Measures must be taken to prevent discharge luminescence. As a conventional method for this purpose, there is a method using thick film screen printing.
For example, on the common electrode side, screen printing is performed to a thickness of about 120 microns to form cells in a sun-shaped pattern, while on the segment electrode side, intervening members are screened to a thickness of about 50 microns in areas other than the Japanese-shaped electrodes. Print. In this case, unless the screen printing in the form of a Japanese character formed on the common electrode side is applied as thick as about 120 microns, light emission will be observed through the thick film printing when the lead wires connecting the segment electrodes are discharged.

On the other hand, in order to print thickly, current screen printing technology cannot obtain the desired thickness in one printing, so printing is performed two or three times.

However, the method described above has the following problems. That is, according to screen printing,
Although the film thickness at the edge of the print is large, the print film thickness decreases as it moves away from the edge, and finally reaches a certain value. Therefore, the film thickness of the Japanese-shaped cell formed on the common electrode side is large at the edge of the Japanese character, and the film thickness decreases as it moves away from the edge. On the other hand, since an intervening member of approximately 50 microns is formed on the segment electrode side at a location away from the edge of the Japanese-shaped electrode, the discharge gap is formed between the intervening member on the segment electrode side and the common electrode side that contacts the intervening member. What should originally be determined by the cell member is not determined by this, but is sometimes determined by the edge film thickness of the Japanese-letter cell of the cell member formed on the common electrode side.

Next, such a pattern will be explained in detail using drawings.

In FIG. 1, 1 and 2 are glass plates, and 3 is a transparent electrode formed on the glass plate 1. 4 and 5 are lead wires that connect the single segment of each digit to the Japanese letter-shaped segment electrodes screen-printed using silver paste. Transparent electrode 3
are formed to include segments for each digit, and dielectric films 6 and 7 are formed on electrodes 3, 4 and 5, respectively. The layer 10 is made by applying a material with a relatively low dielectric constant, such as Al ₂ O ₃ , to areas other than the segment electrodes 4 that form the display.
It is formed by screen printing on a glass plate 2 to a thickness of 50 microns.

Layer 8, except for the Japanese-shaped segment part,
This cell member is formed on a dielectric 6 so that the edge portion of the segment has a thickness of approximately 60 microns, and the layer 9 has a total thickness of approximately 120 μm at the edge portion of the segment.
This is the second cell member formed on top of the first cell member 8 so as to have a micron size. At this time, the cell member 8 that the intervening member 10 is in contact with
The total film thickness of 9 and 9 is about 70 microns, and the discharge gap formed at these locations is about 70 microns.
It becomes 120 microns. Therefore, due to variations in film thickness, the segment discharge space is divided into cell members 8 and 9.
As a result, when the discharge display board is evacuated, the evacuation resistance of the discharge display board becomes high and a large amount of gas remains in the discharge space. Therefore, there were problems such as an increase in the voltage value for causing the discharge display panel to emit light and a decrease in brightness.

An object of the present invention is to provide an extremely simple spacer configuration that solves the above-mentioned problem that the segment discharge space is a closed space.

According to the present invention, a first electrode is covered with a first dielectric material, and a first cell member for forming a desired display on the first dielectric material is formed by a printing method to form a discharge cell, Further, a first substrate having a second cell member formed on the first cell member by a printing method;
A second electrode is covered with a second dielectric material, and a plurality of island-shaped third dielectric materials are formed on the second dielectric material, excluding at least the discharge display electrode portion. An external electrode type discharge display, in which the substrate is airtightly sealed while facing the substrate so that the discharge gap of the discharge cell is determined by the contact between the second cell member and the third dielectric, and a discharge gas is sealed inside. In the method for manufacturing a plate, the third dielectric of the second cell member is adjusted such that the edge portion of the second cell member in a region that does not correspond to the third dielectric does not come into contact with the second dielectric. There is obtained a method of manufacturing an external electrode type discharge display panel, characterized in that the region that contacts the body is formed separately from the non-corresponding region. In a discharge display panel having such a structure, the segment discharge space does not become a closed space, and it is possible to obtain a method for manufacturing a discharge display panel in which the discharge light emission voltage, brightness, etc. are stable.

Next, the present invention will be explained in detail using drawings showing one embodiment.

In FIG. 2, 1 and 2 are glass plates, and the glass plate 1 is provided with a transparent electrode 3. On the other hand, on the glass plate 2, Japanese-shaped segment electrodes 4 and lead wires 5 connecting the single segments of each digit are screen printed using silver paste. The transparent electrode 3 is formed to include a segment for each digit. Next, dielectric films 6 and 7 are formed on these electrodes 3, 4 and 5, respectively. Further, the intervening member and the cell member are formed as follows. First, on the rear glass plate 2, for example, islands are formed in a portion other than the portion facing the transparent electrode 3 including the segment for each digit.
Layer 10 is formed by screen printing a material such as Al ₂ O ₃ to an edge thickness of approximately 50 microns. Next, on the glass plate 1 on which the common transparent electrode 3 has been applied, screen printing is performed on the dielectric material 6 so that the film thickness at the edge of the segment is about 60 microns, excluding the Japanese-shaped segment part. The cell member 8 is formed for the first time. Furthermore, the edge film thickness of the first cell member 8 and the edge film thickness of the second cell member are applied on the transparent electrode 3 excluding at least the Japanese-shaped segment portion and on the portion facing the island-shaped intervening member 10. A second cell member 9 is formed on the cell member 8 by screen printing so that the total edge film thickness including the edge film thickness of the cell member 9 is about 120 microns. In the thus obtained discharge display panel according to the present invention, the edge film thickness of the cell member 8 is about 60 microns, and the film thickness of the flat part away from the edge is about 35 microns.
microns, and the total film thickness of cell member 8 and cell member 9 is the edge of cell member 8 and cell member 9.
The edge of the segment where the edges overlap is about 120 microns, the edge where it abuts the intervening member 10 is about 95 micron, and the flat part facing the intervening member 10 is about 70 micron. Therefore, the discharge gap of the discharge display board according to the present invention is as follows:
It is determined by the intervening member 10 and the cell members 8 and 9 facing the intervening member 10, and its size is approximately
145 microns, and the segment discharge space is never a closed space.

As explained above using the embodiments, according to the gas discharge display board according to the present invention, the segment discharge space does not become a closed space, so the exhaust resistance is low, and gases that are undesirable for the discharge display board are prevented. Since the residual amount is reduced, a gas discharge display panel having extremely stable characteristics can be obtained.

Further, in this embodiment, the method of forming the cell member by printing twice has been described, but the same can be considered in the case where printing is performed once or twice or more. There is no problem with the island shape of the third dielectric.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional discharge display panel, and FIG. 2 is a sectional view of an embodiment of the present invention. 1, 2... Glass plate, 3, 4, 5... Electrode, 6, 7
...dielectric material, 8, 9... cell member on glass substrate 1,
10... Intervening member on the glass substrate 2, 11... Discharge space.

Claims (1)

[Claims] 1. Covering the first electrode 3 with a first dielectric 6, forming a first cell member 8 for forming a desired display on the first dielectric to form a discharge cell by a printing method, and further The first substrate 1 has a second cell member 9 formed on the first cell member by a printing method, the second electrode 4 is covered with a second dielectric 7, and the second dielectric A plurality of island-shaped third dielectric bodies 10 are provided on the body, excluding at least the discharge display electrode portion 4.
The second substrate 2 formed with a In the method for manufacturing an external electrode type discharge display panel in which a discharge gas is sealed, a region of the second cell member 9 that comes into contact with the third dielectric 10 is formed separately from a region that does not come into contact with the second cell member 9; A method for manufacturing an external electrode type discharge display panel, characterized in that the cell member 9 and the third dielectric 10 are brought into contact with each other at their respective edge portions.