JPH0684468A - Dc plasma display panel - Google Patents

Abstract

PURPOSE:To provide a DC plasma display panel of planar discharge type which has a broad operating margin and is therefore stable. CONSTITUTION:A selection anode 14 is provided on a front panel 11 and a cathode 15 and a maintenance anode 16 are provided on the respective portions of a back plate 12 to intersect the selection anode 14. At least one uneven structure such as an insulating cell barrier 17 is provided between the cathode 15 and the maintenance anode 16. The maintenance anode 16 and the cathode 15, both of which cause a planar discharge, are prevented from having conductive material attached between them by the uneven structure and are not adversely affected by the material attaching thereto, so stable and sufficient insulating characteristics are secured, and a DC plasma display panel is obtained which has a broad operating margin and is therefore s table.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC type plasma display panel (hereinafter referred to as PDP) which is a self-luminous flat display panel using gas discharge.

[0002]

2. Description of the Related Art A DC type PDP has a simpler structure than an AC type PDP and is relatively easy to manufacture. In addition, it has excellent high-speed response, and full-color display is also realized.

FIG. 4 shows an example of the structure of a DC type PDP. As shown in the figure, in this DC type PDP, a flat plate-shaped front plate 21 and a rear plate 22 made of glass are arranged in parallel and opposite to each other, and both are provided in a cell provided therebetween. It is held at a constant interval by the barrier 23. Further, an anode 24 is formed on the back side of the front plate 21, a cathode 25 is formed on the front side of the back plate 22 orthogonally to the anode 24, and a fluorescent layer is formed on both sides of the anode 24. 26 are formed adjacent to each other. Then, in this DC type PDP, by applying a predetermined voltage from a DC power source between the anode 24 and the cathode 25 to form an electric field, a display composed of the front plate 21, the rear plate 22 and the cell barrier 23. Discharge is performed inside each cell 27 as an element, and the fluorescent layer 26 on the back side of the front plate 21 is caused to emit light by the ultraviolet rays generated by this discharge so that an observer can visually recognize this light transmitted through the front plate 21. It has become.

The above-mentioned DC type PDP is of a facing type and has a structure having electrodes on the front plate and the rear plate, respectively. Therefore, the electrode on the front plate lowers the aperture ratio and lowers the brightness. In order to avoid such a situation, it is necessary to make the electrodes on the front plate as thin as possible or use transparent electrodes.

As a method of driving the DC type PDP as described above, a line-sequential driving method in which light is sequentially emitted row by row is known. Then, this driving method is usually used for a simple panel, but the brightness decreases as the number of rows of the panel increases, and further, a practical level brightness cannot be obtained for colorization. For this reason, it is necessary to provide the panel with a memory function in order to obtain sufficient brightness even when the panel is made large and the color is increased. As a method for realizing this by a driving method, it is disclosed in Japanese Patent Laid-Open No. 57-86886. There is known a pulse memory driving method as described above.

However, the use of finer electrodes and the use of transparent electrodes are disadvantageous to the increase in size of the panel, and it becomes difficult to adopt a pulse memory driving method capable of improving the brightness by a driving technique. Therefore, as a solution to such a contradiction, a surface discharge type DC type P having a structure having both a cathode and an anode for performing display discharge on a back plate.
DP is being considered.

[0007]

The surface discharge type DC PDP described above can solve the above contradiction because it is possible to form electrodes having sufficient conduction characteristics for both the cathode and the anode of the back plate. Although there is an advantage, since the cathode and the anode are arranged close to each other in the same plane, a conductive substance is apt to adhere between them, which adversely affects the insulating property between the cathode and the anode and reduces the operating margin. There is a problem that it becomes narrow and unstable.

The present invention has been made in order to solve the above problems, and an object of the present invention is to provide a surface discharge type DC PDP which has a wide operation margin and is stable.

[0009]

In order to achieve the above-mentioned object, the present invention provides a display element between both substrates, a front plate and a rear plate, arranged in parallel and opposite to each other. In a DC type plasma display panel in which a plurality of cells as described above are formed, at least one concavo-convex structure is provided between a cathode and an anode which has a DC type surface discharge. It is characterized by being present.

[0010]

In the DC type PDP having the above structure, the concavo-convex structure prevents the conductive material from adhering between the cathode and the anode, and provides stable and sufficient insulation to the cathode and the anode for surface discharge. Fulfill.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial sectional view showing a first embodiment of a DC type PDP according to the present invention. As shown in the figure,
In this DC type PDP, both substrates of a front plate 11 and a rear plate 12 are arranged in parallel and opposite to each other, and both substrates 11 and 12 are held at a constant interval by a cell barrier 13 provided therebetween. ing. A selective anode 14 is provided on the back side of the front plate 11, and a cathode 1 is provided on the front side of the back plate 12 so as to be orthogonal to the selective anode 14.
5 and a sustaining anode 16 are provided. That is, the cathode 1
5 and the sustain anode 16 are parallel to each other. An insulating cell barrier 17 smaller than the normal cell barrier 13 is arranged between the cathode 15 and the sustain anode 16.

In the DC type PDP of this embodiment, selective discharge is performed by the opposing discharge between the selective anode 14 of the front plate 11 and the cathode 15 of the rear plate 12, and the sustain anode 16 and the cathode 15 on the rear plate 12 are discharged. The sustain discharge is generated by the surface discharge during the period. Therefore, since the selective anode 14 only needs to perform selective discharge, it is possible to use a transparent electrode having a narrow line width or high resistance. Further, since the conductive deposits are easily attached to the cathode 15 side of the insulating cell barrier 17 and are not attached to the sustaining anode 16 side, the insulation between the cathode 15 and the sustaining anode 16 performing surface discharge is ensured. It

In the DC type PDP of the second embodiment shown in FIG. 2, a lower insulating layer 18 is arranged on the back plate 12, and a cathode 15, a sustaining anode 16 and a cell barrier 13 are provided thereon. The insulating groove 1 is provided between the cathode 15 and the sustaining anode 16.
9 is provided. In the DC type PDP of this embodiment,
The insulating groove 19 separates the cathode 15 and the sustain anode 16 from each other to ensure the insulation between them.

In the DC type PDP of the third embodiment shown in FIG. 3, an enlarged portion 19 of the insulating groove 19 is provided on the rear plate 12 side.
a is provided. By thus forming the insulating groove 19 into the eaves shape, the insulating property between the cathode 15 and the sustain anode 16 is further enhanced.

[Specific Example 1] As shown in FIG. 1, a sustaining anode 16 having a film thickness of 20 μm, a width of 150 μm and a pitch of 650 μm is formed on a back plate 12 made of glass, and a film thickness of 20 μm.
The cathode 15 was formed in a width of m and a width of 200 μm. At this time, the sustain anode 16 and the cathode 15 are parallel to each other and the distance between them is 15
It was set to 0 μm. Such a shape can be easily formed by, for example, a screen printing method. Further, as the electrode material, a Ni alloy was used in consideration of the sputtering resistance and the secondary electron emission coefficient.

Then, a grid-shaped cell barrier 13 having a width of 150 μm and a height of 200 μm and a size of 500 μm × 350 μm was formed so that one set of the cathode 15 and the sustain anode 16 constitutes one display cell. At this time, an insulating cell barrier 17 smaller than the normal cell barrier 13 is provided between the sustain anode 16 and the cathode 15.
Also formed at the same time. These cell barriers 13 and 17 were formed by using the glass frit by the screen printing method similar to the above. Specifically, it can be easily formed by performing multilayer printing of 8 to 10 layers. After that, baking is performed at about 600 ° C. for 30 minutes so that the sustain anode 16, the cathode 15, the cell barrier 13, and the insulating cell barrier 17 are formed on the back plate 12.
Fixed.

[Specific Example 2] As shown in FIG. 2, a uniform lower insulating layer 18 having a film thickness of 200 μm is formed on a back plate 12 made of glass, and a sustaining anode 16 similar to the specific example 1 is formed thereon. And the cathode 15 was formed. Specifically, the lower insulating layer 18 was formed by a blade coating method using a glass frit, and the sustain anode 16 and the cathode 15 were formed by a screen printing method using Ni paste. Further, the cathode 15 and the sustaining anode 1
Insulation grooves 19 having a width of 100 μm were formed between Nos. 6 and 6 by the sandblast method. The equipment used for sandblasting is SC-3 type (air pressure: 5 kgf / c, manufactured by Fuji Manufacturing Co., Ltd.).
m ² ) and the abrasive is Alundum # 800. The resist for blasting is "ORDYLB" manufactured by Tokyo Ohka Kogyo Co., Ltd.
F-200 "was used, and the patterning of the blast resist was performed by a photolithography method through a mask having a desired pattern. After that, a grid-like cell barrier 13 having a height of 200 μm and a width of 150 μm is formed by the same method as in the specific example 1, and is baked at about 600 ° C. to form the lower insulating layer 1.
It was fixed to 8.

[Specific Example 3] Lines having a pitch of 650 μm, a film thickness of 50 μm, and a width of 150 μm were formed on the back plate 12 made of glass by using a paste containing resin and wax as main components by a screen printing method. Here, ethyl cellulose was used as the resin, and polyethylene wax or sazol wax was used as the wax. Then, a lower insulating layer 18, a sustaining anode 16 and a cathode 15 are formed thereon, insulating grooves 19 are formed by a sandblast method, and then a grid-shaped cell barrier 13 is formed, as in the second specific example. did. Then, by baking this at 600 ° C., the formed material is fixed and the resin and the wax are completely removed, and as shown in FIG.
9 was formed.

DC using the back plate 12 of each of the above specific examples
As a result of measuring the insulation characteristics between the sustaining anode and the cathode in the type PDP, a significant improvement in characteristics was obtained.

[0021]

Since the present invention is configured as described above, it has the following effects.

By providing at least one concavo-convex structure between the cathode and the anode for performing surface discharge, it is possible to prevent the conductive substance from adhering between the two and prevent the adverse effect due to the adhering. Stable and sufficient insulation characteristics are secured, and a surface discharge type DC PDP having a wide operation margin and stable can be obtained.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a first embodiment of a DC type plasma display panel according to the present invention.

FIG. 2 is a partial sectional view showing a second embodiment.

FIG. 3 is a partial sectional view showing a third embodiment.

FIG. 4 is a partial cross-sectional view showing an example of a conventional DC type plasma display panel.

[Explanation of symbols]

 11 Front Plate 12 Back Plate 13 Cell Barrier 14 Selective Anode 15 Cathode 16 Sustaining Anode 17 Insulating Cell Barrier (Uneven Structure) 19 Insulating Groove (Uneven Structure)

Claims (1)

[Claims] 1. A DC type plasma display panel comprising a front plate and a rear plate, both of which are arranged in parallel and opposite to each other, and a plurality of cells as display elements are formed between the two substrates. A DC type plasma display panel having a structure of DC type surface discharge and having at least one concavo-convex structure between a cathode and an anode for performing the surface discharge.