JPH01122548A - Gas discharge panel - Google Patents

Abstract

PURPOSE:To shrink the discharge spot diameter near a spacer to the same size as the spot diameter of other portions and improve the display quality by locally narrowing the electrode width near the spacer. CONSTITUTION:Electrodes 6 are stuck in parallel on a substrate, the electrode shape is formed by etching, a low-melting point glass is covered on the electrodes 6 as a dielectric layer, a spacer 8 stereoscopically intersects the electrodes 6 on this dielectric layer, and they are uniformly distributed and arranged on the whole substrate. A substrate covered with a dielectric layer on parallel electrodes 5 is overlapped on the spacer 8 so that the electrodes 5 are located on both sides of the spacer 8 and intersect the electrodes 6, then the periphery of end sections of both substrates is welded for gas sealing, and the discharge gas is filled. At this time, the electrode width only near the spacer 8 is shrunk.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to making the discharge spot size of a gas discharge panel uniform. With the aim of improving display quality, a spacer is used to support the gap between the two substrates, which have a group of electrodes in directions that intersect with each other and a dielectric layer covering them, on two substrates facing each other with a discharge gas space in between. In a gas discharge panel having a gas discharge panel, the width of the electrode near the spacer is locally narrowed.

[Industrial application field]

The present invention relates to uniform discharge spot size in gas discharge panels.

The present invention is used to manufacture an AC type gas discharge panel in which electrodes made of a plurality of conductive layers are provided on an insulating plate such as a glass substrate, and the electrodes are covered with a dielectric layer.

The thickness of the dielectric layer around the spacer that supports between the two substrates forming the gas space tends to change, and therefore the display spot size tends to change more easily than the spot diameter elsewhere. To prevent this (used as a countermeasure).

[Conventional technology]

An example of a conventional gas discharge panel electrode to which the present invention is applied is
FIG. 3 shows a cross-sectional view of the electrode, and FIG. 4 shows a plan view of the electrode.

FIG. 4 shows only the electrodes 5 and 6 and the spacer 8 in a plan view, and the substrate 1.2 and dielectric layer 3.4 are omitted.

To explain the manufacturing method of the gas discharge panel, the opposing substrate 1
Parallel electrodes 5 and 6 are formed on the opposing surfaces of 2 and 2, and an electrode pattern is formed by photolithography from a thin layer of electrode material fixed to the substrate by sputtering or the like. Alternatively, an electrode material is formed on a substrate by printing and then fired to form an electrode.

Covering it with a dielectric layer 3 or 4 made of low-melting glass, which is several tens of microns thicker than the electrode,
The two electrode substrates are supported by glass columns or ceramic columns at a minute interval on the order of 100 microns in the direction in which the electrodes intersect with each other, and the periphery of the substrates is sealed with a sealing material. The discharge space C is filled with a discharge gas such as the following.

In this way, in a normal manufacturing process, the gas space between the two substrates will be kept uniform, and a spot of a uniform size will be obtained during display, resulting in good results for information display.

(Problems to be solved by the invention) - Although the gas discharge space is kept uniform as shown in F, the dielectric layer around the spacer that supports the space due to slight fluctuations in the firing temperature during manufacturing. The thickness of 3.4 was sometimes thinner than the thickness at a position far from the spacer.Especially in porous (many micropores) ceramic pillars or glass pillars with high surface tension, the dielectric layer A certain low melting point glass material is incorporated into the micropores and surface of the spacer material, and the dielectric layer thickness around the spacer is locally reduced.As a result, the diameter of the discharge spot is smaller than that of the discharge spot located further away from the spacer. , and the display becomes uneven.Therefore, the purpose of the present invention is to reduce the discharge spot diameter near the spacer to the same size as the spot diameter in other parts and improve display quality. be.

Means for Solving Problem C] Therefore, in the present invention, the electrode width near the spacer 8 is locally narrowed so that the discharge spot becomes small.

[For production]

When the thickness of the dielectric layer between the discharge electrodes becomes thinner, the electric field in the discharge space becomes stronger, and the volume of the dischargeable space becomes larger. As a result, the discharge spot became large, but if the electrode width is narrowed as in the present invention, the re-discharge space becomes smaller and this effect can be offset, and the discharge spot becomes smaller and has a normal size. Become.

〔Example〕

Now, FIG. 1 shows a plan view of the electrodes of a panel implementing the present invention.

As described above, this figure shows only the electrodes and spacers, and the substrate and dielectric layer are transparent and cannot be seen.

That is, the panel cross-sectional view is the same as the conventional panel cross-sectional view of FIG. 3 except for the state of the dielectric layer 3.4.

On a substrate 2 (not shown in FIG. 1), electrodes 6 arranged in parallel are formed by depositing the electrode material by sputtering or the like and forming the electrode shape by etching. It is covered with a thickness of several tens of microns. Spacers 8 three-dimensionally intersect with electrodes 6 on dielectric layer 4 and are distributed evenly over the entire substrate surface. Since the spacing between spacers to be supported is as small as 100 microns, thin fiber-like wires with a circular or rectangular cross section are often cut into millimeter-order pieces.

On top of the spacer 8, parallel electrodes 5 are covered with a dielectric material N3 in the same manner as the substrate 2 so that the electrodes 5 are located on both sides of the spacer 8 in a direction that faces and crosses the electrodes 6. After the substrates 1 made up of two substrates are put together, gas-tight welding is performed around the edges of the substrates 1 and 2, and discharge gas is filled.

In the above state, the electrode of the present invention has the structure shown in the first listener side view, that is, the electrode width is reduced by about 40% only in the vicinity of the spacer 8 (in the case of the figure, the electrode adjacent to the spacer), and the other electrode The width of the opposing portions of 6 remains unchanged. This is because the discharge spot was sufficiently reduced by narrowing the electrode width of one substrate 1, and if the spacer material has micropores and is made of ceramic, which is easily wetted by molten glass, the attractive force of the dielectric layer When a larger and more multilayer dielectric layer is to be drawn together to further increase the dischargeable volume of adjacent discharge points, it is necessary to use a dielectric layer that surrounds a spacer and faces each other, as shown in Fig. 2, which shows another electrode structure. This problem can be solved by narrowing the entire area of both electrodes 5 and 6 near the spacer.

According to experiments conducted by the present inventors, it was found that a reduction in electrode width of 1 to 50% was sufficient to achieve the narrowing of the electrode to meet the purpose of the present invention.

〔Effect of the invention〕

According to the present invention, by simply controlling the electrode width, uniformity of the discharge spot diameter, which greatly affects display quality, can be easily achieved, resulting in great progress in improving the quality of displays.

As described above, it can be said that the effects of the present invention are extremely significant now that display devices using gas discharge panels have become widely used.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an electrode structure of the present invention, Fig. 2 is a plan view showing another electrode structure of the invention, Fig. 3 is a sectional view of a spacer portion of a conventional panel, and Fig. 4 is a conventional electrode structure. FIG. In the figure, 1 and 2 are substrates, 3 and 4 are dielectric layers, 5 and 6 are display electrodes, and 8 is a spacer. ■ Plan view of the present invention - Plan view Figure 1 et al.

Claims (1)

[Claims] Two substrates (1) and (2) facing each other with a discharge gas space in between.
), a spacer (8) having electrode groups (5), (6) in mutually intersecting directions and dielectric layers (3), (4) covering them, and supporting the gap (C) between the substrates. A gas discharge panel characterized in that the width of the electrode near the spacer (8) is locally narrowed.