JPH07262930A - Surface discharge type gas discharge panel - Google Patents

Abstract

PURPOSE:To make abnormal discharge hardly occur in non-discharge areas between each pair of surface discharging electrodes even in the case the electrodes are composed in the way the distance of a plurality of surface discharging electrode pairs is narrowed and the electrodes are set densely, in an AC type surface discharge type gas discharging panel. CONSTITUTION:In a gas discharge panel in which a plurality of surface discharging electrode pairs 2 which are composed by setting electrodes adjacently in parallel two by two in one substrate 1 of a pair of substrates 1, 11 set face to face while having a gas discharge space 5 between them are covered with dielectric layer 21 and arranged at a prescribed distance, a recessed part 22 is formed in the dielectric layer 21 by thinning the layer thickness of a dielectric film 21a corresponding to a surface discharging area formed based on each pair 2 of surface discharging electrodes partially. An insulating material 21b having higher specific dielectric constant epsilon than that of the dielectric film 21a is buried in the recessed part 22 and the capacity of the capacitor composed of the pair 2 of face discharging electrodes and the dielectric layer 21 in the area is made higher than that in other area and thus abnormal discharge occurrence in non-discharging area is suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface discharge type gas discharge panel used in various display devices such as information display terminals, and more particularly to a structure capable of improving the resolution of the surface discharge type gas discharge panel for color display. It is about.

A surface discharge type gas discharge panel for color display excites a fluorescent film by ultraviolet rays generated by a gas discharge between two parallel electrodes, so-called surface discharge electrode pairs, and a color corresponding to the fluorescent color. The display for displaying visible light is classified into AC type and DC type according to the discharge method, but the electrode is covered with a dielectric layer to have a memory function.
The C surface discharge type is excellent in brightness, luminous efficiency, and life.

Further, in this surface discharge type gas discharge panel,
In order to perform high-density and high-resolution display, a plurality of surface discharge electrode pairs are closely spaced.

[0004]

2. Description of the Related Art A conventional AC for color display is shown in FIGS.
FIG. 1 shows a plan view of a main part of a surface discharge type gas discharge panel and a cross-sectional view of the main part.

In these figures, 1 is a front substrate made of a glass substrate, and an ITO (Indi
um Tin Oxide) or SnO ₂ or the like, and a plurality of surface discharge electrode pairs 2 each of which is a pair of two transparent electrodes 2a and 2b that are adjacent in parallel and are formed in parallel in the longitudinal direction. It is set up. These transparent electrodes 2a and 2b have a Cr-Cu-Cr three-layer film, a Cr-Cu-Cr three-layer film as shown in order to reduce the resistance value of the electrodes.
A metal electrode 3 made of a Cu two-layer film, a Cu film, a Cr film or the like is laminated so as to partially overlap.

The front substrate 1 including the surface discharge electrode pair 2 having the two-layer structure is covered with a dielectric layer 4 made of low melting point glass or the like, and if necessary, further made of MgO or the like on the surface thereof. It covers the protective film.

On the other hand, on a rear glass substrate (rear substrate) 11 facing the front substrate 1, a Ag thick film or an Al thin film which is orthogonal to the surface discharge electrode pair 2 on the front substrate 1 side is formed. A plurality of horizontal address electrodes 12 are arranged, and stripe-shaped barrier ribs (not shown) for defining discharge regions are provided between the address electrodes 12 so as to be parallel to the address electrodes 12. At the same time, R, G, and B are covered in the recess sandwiched by the partition walls so as to cover the address electrodes 12 and the wall surfaces of the partition walls.
The phosphor film 13 is applied.

The rear substrate 11 and the front substrate 1 are arranged so that the address electrodes 12 and the surface discharge electrode pairs 2 are orthogonal to each other, and the peripheries thereof are hermetically sealed with a sealing material to provide a predetermined gas discharge space. After forming 5, the gas discharge space 5 contains helium (He) or neon (Ne) as a main component, for example, Ne-X.
e Penning gas is enclosed to complete the panel.

When driving and displaying the surface discharge type gas discharge panel having such a structure, first, a predetermined voltage is applied between one electrode 2a of the selected surface discharge electrode pair 2 and the address electrode 12. Then, the address discharge is generated in the address discharge cell determined between the intersections of the electrodes.

Next, one electrode of the surface discharge electrode pair 2
By alternately applying discharge sustaining pulses from the electrodes to the display discharge cells defined between 2a and the other electrode 2b, a discharge that takes over the address discharge occurs in the display discharge cells, and this sustaining is performed. The display is made by the discharge, and the ultraviolet rays generated by the discharge excite the fluorescent substance film 13 provided on the rear substrate 11 to cause the fluorescent light emission to become a color display.

[0011]

Incidentally, the above-mentioned A
In the C-type surface discharge type gas discharge panel, a dielectric layer 4 is coated on the entire surface of the entire substrate 1 including the surface discharge electrode pair 2 in order to have a memory function and to prevent the metal electrode 3 from being oxidized. Therefore, a capacitor is formed between the two electrodes adjacent to the dielectric layer 4.

Further, in the case of obtaining a so-called high-definition display with high density and high resolution, since the electrode pairs of the plurality of surface discharge electrode pairs 2 are brought close to each other, the distance between two adjacent electrode pairs is increased. A capacitor is also formed in the non-discharging area of. This capacitor accumulates the electric charge generated by gas discharge, so when a certain amount of electric charge accumulates in the capacitor in the non-discharging region, this discharge is generated when a discharge is generated in the nearby surface discharge region. There is a problem that a fire is generated and discharge (abnormal discharge) is erroneously generated in the non-discharge region, which deteriorates display quality.

In view of the above-mentioned conventional problems, the present invention has improved the structure of the dielectric layer in the non-discharge region between a plurality of surface discharge electrode pairs to bring the surface discharge electrode pairs closer to each other to achieve a high density. It is an object of the present invention to provide a novel surface discharge type gas discharge panel in which abnormal discharge is unlikely to occur in the non-discharge region even with the electrode arrangement.

[0014]

In order to achieve the above-mentioned object, the present invention forms a pair of two substrates which are parallel and adjacent to each other on one of the pair of substrates facing each other with the gas discharge space interposed therebetween. In a gas discharge panel in which a plurality of surface discharge electrode pairs are covered with a dielectric layer and arranged at predetermined intervals, the dielectric is formed on the dielectric layer in the surface discharge region formed by the surface discharge electrode pairs. An insulating material having a relative dielectric constant larger than that of the body layer is provided.

Further, of the pair of substrates facing each other with the gas discharge space in between, a plurality of pairs of surface discharge electrodes which are paired in parallel and adjacent to each other on one substrate are covered with a dielectric layer, and In a gas discharge panel arranged at predetermined intervals, an insulating material having a relative dielectric constant smaller than that of the dielectric layer is provided on the dielectric layer in the non-discharge region between the plurality of surface discharge electrode pairs. The configuration.

Further, in the above-mentioned panel structure, the distance between the plurality of surface discharge electrode pairs is substantially equal to the distance between the two electrodes forming the surface discharge electrode pair.

[0017]

As described above, an insulating material having a larger relative dielectric constant is provided on the dielectric layer in the surface discharge area formed by the surface discharge electrode pair, and the non-discharge area between each surface discharge electrode pair. By providing an insulating material having a relative dielectric constant smaller than that on the dielectric layer, it is possible to form the capacitor capacitance in the surface discharge region larger than the capacitor capacitance in the non-discharge region, and the capacitor capacitance is small. In the non-discharge region, the amount of accumulated charge is small, so that abnormal discharge is unlikely to occur, and moreover, discharge can be easily generated only in the surface discharge portion.

Therefore, the distance between each surface discharge electrode pair can be made equal to the distance between the two electrodes of the electrode pair, and by doing so, high density and high resolution display can be easily realized. You can

[0019]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 (a) and 1 (b) are explanatory views of a first embodiment in which the present invention is applied to an AC surface discharge type color plasma display panel. FIG. 1 (a) is a plan view of a main part and FIG. 1 (b) is FIG.

This embodiment differs from the conventional panel structure shown in FIGS. 5 (a) and 5 (b) in that a plurality of surface discharge electrode pairs 2 are used.
The two transparent electrodes forming the surface discharge electrode pair 2
It is the same as the distance between 2a and 2b, and the structure of the dielectric layer 21 corresponding to the surface discharge area formed by each surface discharge electrode pair 2 is changed.

Therefore, the same parts as those of the conventional example are designated by the same reference numerals, and different parts will be described in detail. That is, the dielectric layer 21 coated on the plurality of surface discharge electrode pairs 2 is
For example, a low-melting glass having a relative permittivity ε of about 2 is used, but each surface discharge area between the two transparent electrodes 2a and 2b forming each surface discharge electrode pair 2 corresponds to a layer of the dielectric film 21a. For example, the thickness of the dielectric film 21a other than the area is 40 μm.
When it is set to m, it is as thin as about 20 μm, which is 1/2 of that.

Specifically, each surface discharge electrode pair 2 is a rear substrate.
An island-shaped recess 22 is provided by locally thinning only the dielectric film 21a in a portion (a discharge region where display dots are formed) orthogonal to the address electrode 12 on the 11th side. In the island-shaped concave portion 22, a relative dielectric constant ε larger than the relative dielectric constant ε2 of the dielectric film 21a.
An insulating material 21b having 4 to ₅ and containing a dielectric material such as barium titanate (BaTiO ₃ ) or tantalum oxide (Ta ₂ O ₅ ) is embedded by a screen printing method or the like.

As a result, the capacitor capacity of the recess 22 is
About twice as much as the capacitor capacity in the other non-discharge areas,
Or even bigger. By changing the capacitances of the surface discharge area and the non-discharge area in this way, the surface discharge can be easily generated in the surface discharge area, and the surface discharge electrode pair 2 is formed with a space between the surface discharge electrode pairs 2. Even if the two transparent electrodes 2a and 2b are made to be close to each other at the same distance, it is possible to suppress the occurrence of abnormal discharge in the non-discharge region between each electrode pair 2.

Therefore, the display quality of the AC surface discharge type color plasma display panel is improved, and high-density and high-resolution display can be easily realized. In order to form the above-mentioned structure of the dielectric layer 21, a paste-like insulating material made of low melting point glass is uniformly applied on the surface of the front substrate 1 provided with the plurality of surface discharge electrode pairs 2 by a screen printing method. After that, heat treatment is performed to first form the dielectric film 21a.

Next, a photoresist is applied to the surface of the dielectric film 21a, and photolithography is performed so as to locally remove the surface discharge area (display dot) defined by each surface discharge electrode pair 2 of the photoresist film. Patterning by a method and thinning the portion of the dielectric layer 21 exposed by the patterning by known chemical etching or the like, and then removing the photoresist film to form a concave portion 22 in a portion corresponding to each surface discharge region. The dielectric film 21a is obtained.

Next, for example, barium titanate (BaT) having a relative dielectric constant ε4 to 5 larger than the relative dielectric constant ε2 of the dielectric film 21a is provided in the island-shaped recess 22 provided in the dielectric film 21a.
Insulating material 21b containing a dielectric material such as iO ₃ ) or tantalum oxide (Ta ₂ O ₅ ) is selectively applied (embedded) by a screen printing method or the like, and then heat treatment is performed to form a concave portion 22 in the concave portion 22. The capacitor capacity (capacitor capacity in the surface discharge area) can be doubled or more than the capacitor capacity in other non-discharge areas.

FIGS. 2 (a) and 2 (b) are views for explaining a second embodiment corresponding to a modification of the first embodiment of the present invention. FIG. 2 (a) is a plan view of essential parts and FIG. ) Is a sectional view of an essential part. Note that FIG.
The same parts as those in the first embodiment of (a) and (b) are designated by the same reference numerals.

The second embodiment is different from the first embodiment in that the shape of the recesses in which the insulating material having a large relative dielectric constant is embedded is changed from the island shape to the stripe shape. Specifically, as shown in FIG. 2 (a), a stripe-shaped recess 32 corresponding to the shape of each surface discharge electrode pair 2 is provided in the dielectric film 31a, and the stripe-shaped relative dielectric constant described above is provided in the recess 32. It is embedded with a large insulating material 31b.

Such a structure of the dielectric layer 31 can be easily formed by the photolithography technique and the screen printing method as in the first embodiment, and the surface discharge can be easily generated in the surface discharge region. In addition, the effect of suppressing the occurrence of abnormal discharge in the non-discharge region can be obtained.

Therefore, the display quality of the AC surface discharge type color plasma display panel is improved, and high-density and high-resolution display can be easily realized. 3 (a) and 3 (b) are views for explaining the third embodiment of the present invention.
Figure (a) is a plan view of the main part, and Figure (b) is a cross-sectional view of the main part. The same parts as those in the second embodiment shown in FIGS. 2 (a) and 2 (b) are designated by the same reference numerals.

The third embodiment differs from the first and second embodiments described above in that the dielectric layer 41 has a large relative dielectric constant ε of 4 to 5, for example, barium titanate (BaTiO ₃ ), or The point that the dielectric film 41a is formed using an insulating material containing a dielectric material such as tantalum oxide (Ta ₂ O ₅ ) and the dielectric film 41a.
The layer thickness of the portion corresponding to the non-discharge area between the surface discharge electrode pairs 2 of a is 40 μm, for example, the layer thickness of the dielectric film 41a in the surface discharge area.
In the case of m, the thickness is made as thin as about 20 μm, which is half that, and stripe-shaped recesses 42 are formed in the dielectric layer portion of the non-discharge region.

An insulating material 41b made of a low melting point glass or the like having a relative permittivity ε2 smaller than the relative permittivity ε4 to 5 of the dielectric film 41a is screen-printed in the stripe-shaped recess 42 of the dielectric film 41a. That is, the dielectric layer 41 is formed by embedding by a method or the like and performing heat treatment.

With such a structure of the dielectric layer 41 as well,
Since the capacitor capacity in the non-discharge area is smaller than that in the surface discharge area as in the first and second embodiments, it is possible to more effectively suppress the occurrence of abnormal discharge in the non-discharge area.

In the above embodiment, the insulating materials 31b and 41b are embedded in the recesses 32 and 42 of the dielectric films 31a and 41a, and the surfaces thereof are provided on the same surface as the surfaces of the dielectric films 31a and 41a. Membrane 31
Insulating material on the surface without forming recesses on a and 41a
You may provide so that 31b and 41b may be laminated | stacked.

Further, as another embodiment, although not shown, only the dielectric layer portion of the surface discharge region is thinly formed, or the material of the dielectric layer in that portion is made of barium titanate (BaTiO ₃ ) or tantalum oxide. Use a material with a large relative permittivity ε of 4 to ₅ such as (Ta ₂ O ₅ ), and use a material with a small relative permittivity ε of about 2 such as low melting point glass in the other non-discharge region. It is also possible to form a body layer.

The present invention is also applicable to an AC surface discharge type plasma display panel for monochrome display which does not have a phosphor.

[0037]

As is apparent from the above description, according to the AC type surface discharge type gas discharge panel of the present invention, the capacitances of the surface discharge area and the non-discharge area are changed. By setting the capacity to be smaller than that of the surface discharge area, abnormal discharge in the area other than the surface discharge area is less likely to occur and effectively suppressed, so that the display quality is improved.

Further, according to this structure, the distance between each pair of surface discharge electrodes can be made substantially equal to the distance between the two electrodes forming the surface discharge electrode pair, so that high density and high resolution can be achieved. The above-mentioned display is obtained, and the practically excellent effect is exhibited.

[Brief description of drawings]

FIG. 1 is a plan view and a cross-sectional view of an essential part for explaining an AC surface discharge type color plasma display panel according to a first embodiment of the present invention.

FIG. 2 is a plan view and a cross-sectional view of an essential part for explaining an AC surface discharge type color plasma display panel according to a second embodiment of the present invention.

FIG. 3 is a plan view and a cross-sectional view of an essential part for explaining an AC surface discharge type color plasma display panel according to a third embodiment of the present invention.

FIG. 4 is a plan view of a main part and a cross-sectional view of the main part showing a surface discharge type gas discharge panel such as a conventional AC surface discharge type color plasma display panel.

[Explanation of symbols]

 1 Front Substrate 2 Surface Discharge Electrode Pair 2a, 2b Transparent Electrode 3 Metal Electrode 5 Gas Discharge Space 11 Rear Substrate 12 Address Electrode 13 Fluorescent Film 21, 31, 41 Dielectric Layer 22, 32, 42 Recess 21a, 31a, 41a Dielectric film 21b, 31b, 41b Insulating material

Claims (3)

[Claims] 1. A plurality of surface discharge electrode pairs (2), which are paired in parallel and adjacent to each other, on one substrate (1) of a pair of substrates facing each other across a gas discharge space. In a gas discharge panel covered with a layer (21) and arranged at a predetermined interval, the dielectric film (21a) in the surface discharge region formed by the surface discharge electrode pair (2) is coated with the dielectric film. A surface discharge type gas discharge panel comprising an insulating material (21b) having a relative dielectric constant larger than that of the body film (21a). 2. A plurality of surface discharge electrode pairs (2), which are paired in parallel and adjacent to each other, on one substrate (1) of a pair of substrates facing each other across a gas discharge space. In a gas discharge panel covered with a layer (41) and arranged at a predetermined interval, the dielectric film (41a) in the non-discharge region between the plurality of surface discharge electrode pairs (2) is A surface discharge type gas discharge panel comprising an insulating material (41b) having a relative dielectric constant smaller than that of the dielectric film (41a). 3. The distance between the plurality of surface discharge electrode pairs (2) is substantially equal to the distance between the two electrodes (2a, 2b) forming the surface discharge electrode pair (2). 2. A surface discharge type gas discharge panel according to any one of 1.