JPH06231693A - Plasma display panel - Google Patents

Abstract

(57) [Abstract] [Purpose] In a DC plasma display panel with a trigger electrode, a finer dot pitch of 0.2 mm
Provided are a panel electrode and a barrier rib structure which can relatively easily manufacture the following panel. [Structure] The partition that was conventionally formed by the printing method is
It is formed and used by processing a metal sheet by an etching method. At this time, this partition also serves as an anode,
The common electrode was used. As a result, thin partition walls can be formed with high precision, so that a high-definition panel with a pitch of 0.2 mm or less can be obtained, and since no translucent electrode is used, there is an advantage of improving brightness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a DC type plasma display panel, and more particularly to a new structure of high definition type electrodes and partition walls.

[0002]

2. Description of the Related Art A conventional DC type plasma display panel is provided with a high-definition and high-density high-density high density high density display which has a trigger electrode disposed under a cathode via a dielectric and discharge cells are arranged in a matrix. Description will be made taking the city PDP as an example. As shown in FIGS. 5A and 5B, after forming a transparent and conductive ITO film or SnO 2 film on the front glass substrate 1, the anode 3 is formed by photolithography. Further, the trigger electrode 4 is formed on one of the rear glass substrates 2 by a thick film printing method, and the entire surface thereon is covered with the dielectric layer 5.
Cover with. Next, the cathode 6 is made orthogonal to the trigger electrode 4.
To form. Further, a partition 7 is formed so as to be orthogonal to the cathode 6. The barrier ribs 7 serve also as the barrier ribs of the discharge cells and the dimensions of the discharge gap, and are usually printed twice or more by a thick film printing method with a dielectric to which a black pigment is added to prevent leakage of light emission and have a predetermined height ( About 100 μm). The front glass substrate and the rear glass substrate thus formed are combined so as to face each other so as to form a discharge cell, and the periphery thereof is hermetically sealed with frit glass,
A plasma display panel has been constructed by introducing a dischargeable rare gas therein.

In the operation of this conventional plasma display panel, first, 180 V is applied between the trigger electrode 4 and the cathode 6.
A certain voltage is applied and trigger discharge occurs. Since this discharge occurs through the dielectric layer 5, it stops in a short time unless the reversal voltage is continuously applied. Actually, this trigger discharge stops in a short time, but during this discharge, the cathode 6 and the anode 3
A large number of charged particles are generated between the cathode 6 and the anode 3.
It moves to the main discharge mode between and, 50V for the cathode, 3 for the anode
A sufficiently strong main discharge could be generated by applying a voltage of about 0V.

[0004]

In the structure of this conventional panel, the formation of the partition wall which also serves as a gap is carried out by thick film printing. However, it is said that the current thick film printing technology has a limit of about 0.2 mm pitch.
Further, since this partition also serves as a gap, it requires a height of about 100 μm, and it is not so easy to put into practical use the technique of forming the partition using the photoetching technique. Therefore, there is a problem that there is no suitable method for forming partition walls having a finer pitch than 0.2 mm pitch.

Further, in the conventional method of forming the barrier ribs of the panel using the thick film printing technique, it is difficult to suppress variations in the width of the barrier ribs. That is, first, due to the dimensional accuracy of the screen, the specified line width varies by about ± 10 μm. In addition, the line width of the screen becomes thicker by 20 to 50 μm due to the sagging (leveling) of the paste during printing.

The degree of this variation does not become a problem when the discharge cell pitch is large, but becomes more serious as the resolution becomes higher. For example, when the discharge cell pitch is 0.4 mm and the designated line width of the screen is 0.12 mm, the variation in the line width of the barrier rib is 0.13 to 0.18 mm. The variation in the opening area of the discharge cells is 0.0729 to 0.048 when the discharge cell pitch is the same vertically and horizontally and the partition line width is the same.
The ratio of the maximum opening area to the minimum opening area of 4 mm ² is about 1: 0.664, and the difference is about 33.6%. Therefore, this variation in the opening area causes variation in the amount of light emitted by discharge, which does not affect the brightness, but there is a problem that the display quality is seriously affected because the brightness changes.

[0007]

DISCLOSURE OF THE INVENTION The DC type plasma display panel of the present invention is one in which a metal sheet is formed into a partition shape by an etching method instead of a conventional partition wall formed by thick film printing and also serves as an anode. It is provided between the front glass substrate and the rear glass substrate. Since this anode is electrically connected to each cell, it is operated as a common electrode.

[0008]

Since the anode that also serves as the partition is formed by processing the metal sheet by the etching method, the partition width can be accurately determined.
It is possible to provide a DC type plasma display panel which can be formed thinner and has a higher definition than a pitch of 0.2 mm.

Further, since the etching method is used, it is possible to accurately suppress the variation in the width of the partition wall. The specified line width can be suppressed to about ± 10 μm. Therefore, the variation in the line width of the partition wall is 0.11 to 0.
13 mm, and the variation of the opening area of the discharge cell is
0.11 to 0.13 mm, the variation of the opening area of the discharge cell is 0.0841 to 0.0729 mm ² , and the ratio of the maximum opening area to the minimum opening area is about 1: 0.86.
In No. 7, the difference is about 13.3%, and a significant improvement effect of 20.3% can be expected. Therefore, it is possible to provide a DC plasma display panel with stable brightness variation.

[0010]

The present invention will be described below with reference to the drawings. FIG. 1A is a sectional view of a part of a plasma display panel showing a first embodiment of the present invention.
(B) is a partial schematic diagram in which the front glass substrate and the rear glass substrate are separated. As shown in FIG. 1, the front glass substrate 1
A phosphor 9 is formed on top. On the other hand, the trigger electrode 4 is formed on the rear glass substrate 2 by the thick film printing method, and the entire surface thereof is covered with the dielectric layer 5. Next, the cathode 6 is formed so as to be orthogonal to the trigger electrode 4. Further, the entire surface on the cathode is covered with the dielectric layer 8 except the portion where the cathode protrusion 10 is formed, and then the cathode protrusion 10 is formed by thick film printing. Next, the anode 3 in which a metal sheet having a plate thickness of about 100 μm is formed in a partition shape by an etching method is aligned and installed so as to form a discharge cell. The front glass substrate and the rear glass substrate thus formed are combined so as to face each other so as to form a discharge cell, the periphery thereof is hermetically sealed with frit glass, and once exhausted, a rare discharge is possible inside. Glass was introduced and sealed to complete a plasma display panel.

The operation of this panel is as follows. First, the trigger electrode 4
A voltage of about 180 V is applied between the cathode and the cathode protrusion 10 to generate a trigger discharge. Since this discharge occurs via the dielectric layers 5 and 8, it stops in a short time. At the time of this trigger discharge, a large number of charged particles are generated between the cathode protrusion 10 and the anode 3, so that the main discharge mode between the cathode protrusion 10 and the anode 3 is entered, and a voltage of about 50 V is applied to the cathode and 30 V is applied to the anode. A sufficiently strong main discharge can be generated by applying the. At this time, since the anode is common, the anode is used as a scanning electrode, an erasing voltage is once applied during scanning of each row, and then writing is performed by the trigger electrode. In the case of this embodiment, the phosphor 9 is excited by the ultraviolet rays generated by this main discharge to obtain a color display.

As described above, in the first embodiment, since the anode which also serves as the partition is formed by processing the metal sheet by the etching method, the partition width can be formed accurately and thinner, and the width is 0.2 mm. DC with higher definition than pitch
A plasma display panel can be provided.

Further, since the etching method is used, variations in the width of the partition walls can be suppressed accurately. It is possible to suppress the variation of the line width of the partition wall by about ± 10 μm. Therefore, the variation in the line width of the partition wall is 0.11 to 0.
13 mm, and the variation of the opening area of the discharge cell was 0.
At 0841 to 0.0729 mm ² , the ratio of the maximum opening area to the minimum opening area is about 1: 0.867, and the difference is about 13.3%, and a significant improvement effect of about 20% can be expected. . Therefore, the variation of the opening area of the discharge cell can be reduced by about 20% and the variation of the light amount of the discharge emission can be reduced, so that the DC type plasma display panel having stable brightness and good display quality can be provided.

In this example, the discharge cell pitch is 0.4 mm.
Although the above-mentioned effect is hardly present when the discharge cell pitch is large, a remarkable effect can be expected as the resolution becomes higher.

2A and 2B are views showing a second embodiment of the present invention, which is different from the above-mentioned first embodiment in the following points. That is, the phosphor 9 is formed around the cathode protrusion 10. In the second embodiment, since the phosphor is formed closer to the discharge electrode, it has an advantage that the excitation of ultraviolet rays becomes stronger and the fluorescence efficiency can be increased.

FIGS. 3A and 3B are views showing a third embodiment of the present invention, which is different from the first embodiment described above in the following points.
That is, as shown in FIG. 3, at least one notch 11 is provided in a portion of the anode 3 which corresponds to one cell. Third
In the embodiment, since at least one notch 11 is provided in a portion corresponding to one cell of the anode 3, it is possible to exhaust gas and introduce neon gas into each cell evenly and quickly when exhausting and introducing neon gas. Has the advantage of becoming.

FIG. 4 is a perspective view showing a fourth embodiment of the present invention. In this embodiment, as shown in FIG. 4, the anode 3 formed by etching a metal sheet has a sheet shape, and the projections 12 protruding from the front glass substrate 1 and the rear glass substrate 2 to the outside at the four corners thereof. Is provided. In the fourth embodiment, since the sheet-shaped anode 3 is provided with the protrusions 12 that protrude outward from the front substrate and the rear substrate, the protrusions 12 enable efficient alignment and sealing. At the time of attachment, this projection 12 is also sealed at the same time, and the anode 3 can be fixed at the same time.

It should be noted that in both cases, the light emission of the display can be observed without passing through the ITO film or the SnO 2 film, etc.
It has the advantage that it is not affected by the transmittance of the O2 film or the like.

[0019]

As described above, in the present invention,
Since the anode that also serves as a partition is formed by processing a metal sheet by an etching method, the partition width can be formed accurately and thinner, and a DC-type plasma display panel with a higher definition than a 0.2 mm pitch can be provided. .

Further, since the etching method is used, it is possible to accurately suppress variations in the width of the partition wall. The specified line width can be suppressed to about ± 10 μm.

[Brief description of drawings]

1A and 1B are a partial sectional view and a partial schematic view of a first embodiment of the present invention.

2A and 2B are a partial sectional view and a partial schematic view of a second embodiment of the present invention.

3A and 3B are a partial sectional view and a partial schematic view of a second embodiment of the present invention.

FIG. 4 is a schematic diagram of a fourth embodiment of the present invention.

5A and 5B are a partial cross-sectional view and a partial schematic view of a conventional example.

[Explanation of symbols]

 1 Front Glass Substrate 2 Rear Glass Substrate 3 Anode 4 Trigger Electrode 5,8 Dielectric Layer 6 Cathode 7 Partition 9 Phosphor 10 Cathode Protrusion 11 Cutout 12 Protrusion

Claims (2)

[Claims] 1. A DC type plasma display panel having at least an anode and a cathode for producing a main discharge, and a third electrode disposed below the cathode via a dielectric, wherein each anode has a discharge. A plasma display panel, which is a common electrode electrically connected to each cell and also serves as a partition wall of each cell. 2. The plasma display panel according to claim 1, wherein the anode is formed of a metal sheet in a partition shape by an etching method.