KR20040088754A - Plasma display panel - Google Patents

Abstract

PURPOSE: A plasma display panel is provided to prevent miss-discharge of discharge cells due to impurity of a frit and shorten an exhausting time of a panel through an exhausting hole. CONSTITUTION: A plasma display panel comprises a first and a second substrate(2) spaced apart from each other; a plurality of address electrodes covered by a dielectric layer on the first substrate; a plurality of barrier ribs(17) for forming a discharge space; a fluorescent layer formed inside the discharge space; a plurality of discharge sustain electrodes covered by a dielectric layer on the second substrate; a frit(24) for encapsulating the first and the second substrate; and an exhausting hole(28) provided on at least one of the first and the second substrate.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having a frit for sealing the first and second substrates on a non-display area, and an exhaust hole for exhausting the inside of the panel. .

Background Art In recent years, plasma display panels, which have been spotlighted by large screen image display devices such as flat wall-mounted televisions, realize arbitrary images according to discharge mechanisms occurring in discharge cells, as is well known. Such discharge cells are formed by barrier ribs positioned on the substrate with an arbitrary pattern (stripe or grating).

FIG. 8 is a plan view of a plasma display panel according to the prior art, and when a region where discharge cells are formed to implement a substantial image is called a display region 1, an area other than the display region 1, that is, a non-display region ( 3) A frit 9 for sealing the first and second substrates 5 and 7 is provided, and an exhaust hole 11 for exhausting the inside of the panel is provided.

When the exhaust hole 11 is located on the non-display area 3 outside the left and right edges of the display area 1, the outermost partition wall along the horizontal direction of the screen (the X direction of the drawing) in the drawing ( When the distance between the partition 13 located at the outermost part of the display area and the exhaust hole 11 is a1 and the distance between the exhaust hole 1 and the frit 9 is a2, in the conventional plasma display panel Typically a1 and a2 are designed identically.

In order to prevent impurities from entering the discharge area of the panel, that is, the display area 1, through the exhaust hole 11 in the process of exhausting the inside of the panel, the center point of the exhaust hole 11 is the outermost partition 13 It is generally formed at a lower position along the vertical direction of the screen (Y direction in the drawing) with a gap of a3 from the upper end (marked with a D point) of the screen.

At this time, the frit 9 contains materials of various components, and in particular, contains a large amount of lead, which is an impurity that causes erroneous discharge of the discharge cells.

However, in the above-described plasma display panel, even if the distance a1 between the outermost partition 13 and the exhaust hole 11 is secured by the distance a2 between the exhaust hole 11 and the frit 9, the exhaust hole 11 Since the display area 1 is located close to the display area 1, impurities remain near the exhaust hole 11, causing a misdischarge to occur in discharge cells close to the exhaust hole 11.

Furthermore, in the above-described plasma display panel, since the upper end of the outermost partition 13 is located higher than the exhaust hole 11, the movement path of the materials exiting through the exhaust hole 11 in the process of exhausting the inside of the panel It has the disadvantage of longer exhaust time.

Therefore, the present invention is to solve the above problems, an object of the present invention is to prevent the discharge of the discharge cells by the impurities contained in the frit and also to reduce the exhaust time of the panel through the exhaust hole plasma It is to provide a display panel.

1 is a plan view of a plasma display panel according to an exemplary embodiment of the present invention.

2 is a partially exploded perspective view of a plasma display panel according to an embodiment of the present invention.

3 is a partial cross-sectional view of the plasma display panel viewed in the direction of arrow A of FIG.

4 to 5 are partially enlarged plan views of the plasma display panel shown in FIG.

6 to 7 are partially enlarged plan views of a plasma display panel for explaining a modification to the embodiment of the present invention.

8 is a plan view of a plasma display panel according to the prior art.

In order to achieve the above object, the present invention,

First and second substrates arranged parallel to each other at random intervals, a plurality of address electrodes covered with a dielectric layer on the first substrate, and a display region set in these substrates between the substrates to form a discharge space And a plurality of discharge sustaining electrodes covered by a dielectric layer on one surface of the partition walls including the outermost partition wall positioned at the outermost part of the display area, a fluorescent layer formed in the discharge space, and a second substrate facing the first substrate. And a frit provided at an edge of the substrates to seal the substrates, and an exhaust hole provided in one of the first and second substrates on a non-display area surrounding the display area, the edge of the display area. Plasma display panel in which the distance between the outermost bulkhead and the exhaust hole is greater than the distance between the exhaust hole and the frit along the direction from the frit to the frit. Provides a null.

Preferably, the outermost partition wall is positioned at the outermost part of the display area along the long axis direction of the substrates, and the distance between the outermost partition wall and the exhaust hole along the long axis direction of the substrates is greater than the gap between the exhaust hole and the frit. .

More preferably, the exhaust hole satisfies the following conditions.

Here, d1 and d2 represent the distance between the outermost partition wall and the exhaust hole and the distance between the exhaust hole and the frit along the long axis direction of the substrates, respectively.

In this case, the center point of the exhaust hole may be located on the same line as the end of the outermost partition wall along the long axis direction of the substrates from one end of the outermost partition wall along the long axis direction of the substrates, and the outermost part of the exhaust axis along the long axis direction of the substrates. It may be positioned at any distance from one end of the partition wall toward the direction away from the outermost partition wall along the short axis direction of the substrates.

On the other hand, the outermost partition wall is located at the outermost portion of the display area along the short axis direction of the substrates, and the gap between the outermost partition wall and the exhaust hole along the short axis direction of the substrates is larger than the gap between the exhaust hole and the frit. Is done.

More preferably, the exhaust hole satisfies the following conditions.

Here, d4 and d5 represent the distance between the outermost partition wall and the exhaust hole along the short axis direction of the substrates, and the distance between the exhaust hole and the frit, respectively.

In this case, the center point of the exhaust hole may be located on the same line as the end of the outermost partition wall along the short axis direction of the substrates from one end of the outermost partition wall along the short axis direction of the substrates, and the outermost part along the short axis direction of the substrates. It may be positioned at any distance from one end of the partition wall toward the direction away from the outermost partition wall along the long axis direction of the substrates.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3 are respectively a plan view and a partially exploded perspective view of a plasma display panel according to an embodiment of the present invention, and a partial bonding cross-sectional view of the plasma display panel viewed from the direction of arrow A of FIG.

As shown, the plasma display panel arranges the two transparent first substrates 2 and the second substrates 4 substantially parallel at arbitrary intervals, and implements an image by the discharge mechanism between the substrates. It is provided with a configuration that can.

Looking at the configuration thereof, first, a plurality of address electrodes 8 covered with a white dielectric layer 6 are formed in a stripe pattern on the first substrate 2. In addition, discharge sustaining electrodes 12 disposed on one surface of the second substrate 4 facing the first substrate 2 orthogonal to the address electrodes 8 and covered with the transparent dielectric layer 10 are parallel to each other. It is formed in a stripe pattern. The discharge sustaining electrodes 12 are made of a transparent material such as indium tin oxide (ITO).

In addition, a transparent protective film 14 made of MgO or the like is disposed on the dielectric layer 10 of the second substrate 4, and is parallel to the address electrodes 8 between the first substrate 2 and the second substrate 4. A plurality of partition walls 16 positioned between these address electrodes 8 are provided. Furthermore, a fluorescent layer 18 made of R, G, and B phosphors is provided on the side surfaces of the partition walls 16 and the top surface of the dielectric layer 6 of the first substrate 2.

The partitions 16 constitute a space formed therebetween as a discharge space, and a discharge gas (not shown) is injected into the discharge space to form a discharge cell 20. These partitions 16 are located in the display area 22 set on the first and second substrates 2 and 4 as shown in FIG. 1.

At this time, in the present embodiment, the partition wall 16 is formed in a lattice shape, but the shape of the partition wall 16 in the present invention is not limited thereto, for example, other shapes such as the same stripe pattern as the address electrode 8. It may also be formed as.

In the plasma display panel having the above-described configuration, the non-display area that faces the display area 22 and faces the first substrate 2 and the second substrate 4 facing each other, seals the frit 24 around them. One display device is provided with an exhaust hole 28 on the 26 to exhaust impurities filled in the discharge cells 20 through the exhaust hole 28, and then to fill the discharge cells 20 with discharge gas. Is completed.

The plasma display panel according to the present exemplary embodiment prevents impurities contained in the frit 24 from remaining in the discharge cells 20 near the exhaust hole 28, thereby preventing the discharge of the discharge cells 20 due to the impurities. In addition to minimizing the exhaust time of the panel is adopted.

In the present invention, when the partition located at the outermost part of the display area 22 is called the outermost partition 17, the outermost partition wall is arranged along the direction from the edge of the display area 22 toward the frit 24. It means a configuration in which the distance between the 17 and the exhaust hole 28 is larger than the distance between the exhaust hole 28 and the frit 24.

More specifically, the partition located at the outermost part of the display area 22 along the long axis direction of the plasma display panel, that is, the horizontal direction of the screen (the X direction of the drawing), is called the outermost partition wall 17a. When the distance between the outermost partition 17a and the exhaust hole 28 along the direction is d1 and the distance between the exhaust hole 28 and the frit 24 is d2, d1 and d2 in the present embodiment are as follows. It is set to satisfy the condition.

Thus, as the distance d1 between the outermost partition 17a and the exhaust hole 28 is set to be larger than the distance d2 between the exhaust hole 28 and the frit 24, in the present embodiment, the frit 24 Impurities contained in the C), in particular, lead components which cause misdischarge of the discharge cells 20 can be greatly reduced in the discharge cells 20 around the exhaust holes 28, so that the discharge cells 20 due to the lead components can be greatly reduced. Can minimize the discharge of the battery.

Furthermore, in the above-described configuration, when the inside of the panel is exhausted and the exhaust hole 28 is sealed using the torch, the inflow of external impurity gas toward the discharge cells 20 can be suppressed to the maximum, so that the discharge cell by the impurity gas ( The misdischarge of 20) can be greatly reduced.

The following table shows whether the plasma display panel is discharged incorrectly according to the distance d1 between the outermost partition 17a and the exhaust hole 28 and the distance d2 between the exhaust hole 28 and the frit 24. As the measured experimental data, 10 sheets of 42-inch plasma display panels were used in both Comparative Examples and Examples 1-6.

d1 (mm) d2 (mm) Number of false discharge panels d1: d2 Comparative example 3.92 3.92 7 1: 1 Example 1 4.2 3.72 4 1.129: 1 Example 2 4.5 3.42 4 1.315: 1 Example 3 5.0 2.92 0 2.066: 1 Example 4 5.5 2.42 0 2.272: 1 Example 5 6.0 1.92 0 3.125: 1 Example 6 6.5 1.42 0 4.577: 1

As shown in the table, an embodiment in which the distance d1 between the outermost partition wall 17a and the exhaust hole 28 is enlarged by two times or more than the distance d2 between the exhaust hole 28 and the frit 24. It can be seen from 3 to 6 that no discharge panel appears. Therefore, in view of the above experimental results, it is more preferable to set d1 and d2 to satisfy the following conditions.

Furthermore, the plasma display panel according to the present embodiment, in addition to the above-described configuration, changes the position of the exhaust hole 28 along the short axis direction of the plasma display panel, that is, the vertical direction of the screen (Y direction in the drawing). The exhaust time of the panel can be shortened effectively.

Specifically, in the present embodiment, in addition to the above-described configuration, the center point of the exhaust hole 28 is defined from the upper end (marked as point D) of the outermost partition wall 17a to the horizontal direction (the X direction in the drawing) of the screen. 4, or the center point of the exhaust hole 28 along the vertical direction of the screen (in the Y direction of the drawing) from the upper end of the outermost partition wall 17a (indicated by the point D). It is set to have a distance of d3 toward the direction away from the outer partition 17a (see Fig. 5).

In this manner, the exhaust hole 28 is formed at the same height as the upper end of the outermost partition wall 17a or the exhaust hole 28 is disposed at the upper end of the outermost partition wall 17a so that the exhaust hole 28 and the outermost partition wall 17a do not overlap. As formed at a position higher than the end, in the present embodiment, when exhausting the inside of the panel through the exhaust hole 28, the exhaust path from the discharge cell 20 to the exhaust hole 28 is shortened to exhaust the plasma display panel. The time can be shortened effectively.

The following table shows the experimental data measured by measuring the degree of vacuum in the plasma display panel according to the exhaust time. In the table below, the comparative example shows a case where the center point of the exhaust hole 11 is located 1 mm below the upper end of the outermost partition wall 13 (see FIG. 8). In Example 1, the center point of the exhaust hole 28 is shown. The case is located at the same height as the upper end of the outermost partition wall (17a) (see Fig. 4), the second embodiment is located 2mm higher from the upper end of the outermost partition wall (17a) of the exhaust hole 28 The case (see FIG. 5).

Exhaust time (minutes) Vacuum degree (Torr) Comparative example Example 1 Example 2 10 1.20 1.60 1.40 30 0.87 0.71 0.65 50 0.74 0.50 0.42 120 0.50 0.32 0.24 240 0.31 0.27 0.19 360 0.22 0.19 0.16 480 0.17 0.16 0.14 600 0.15 0.14 0.12 720 0.13 0.11 0.10 840 0.11 0.10 0.098

As shown in the above table, when evacuating the inside of the panel for the same time, it can be seen that the case of Examples 1 and 2 shows a greater degree of vacuum than that of the comparative example. This difference in vacuum means that in the case of Examples 1 and 2, the exhaust time can be shortened more effectively than in the case of the comparative example.

6 and 7 are partially enlarged plan views of a plasma display panel for explaining a modification of the embodiment of the present invention.

In this modified example, when the partition wall located at the outermost part of the display area 22 along the short axis direction of the plasma display panel, that is, the vertical direction of the screen (the Y direction in the drawing), is referred to as the outermost partition wall 17b. The distance d4 between the outermost partition 17b and the exhaust hole 28 is greater than the distance d5 between the exhaust hole 28 and the frit 24. More preferably, the distance d4 between the outermost partition 17b and the exhaust hole 28 along the short axis direction is greater than twice the distance d5 between the exhaust hole 28 and the frit 24. Is done.

Further, the center point of the exhaust hole 28 is set at the same position along the right end of the outermost partition 17b (indicated by the point D ') and the vertical direction of the screen (in the Y direction of the drawing) with reference to the drawing (Fig. 6) Set a distance of d6 from the right end (indicated by the point D ') of the outermost partition 17b toward the direction away from the outermost partition 17b along the horizontal direction of the screen (X direction in the drawing). do.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the range of.

As described above, according to the present invention, since impurities contained in the frit, in particular, lead components which cause misdischarge of the discharge cells, can be suppressed to the maximum in the discharge cells around the exhaust hole, discharge by impurities contained in the frit Misdischarge of the cell can be minimized. Further, in the plasma display panel according to the present invention, when exhausting the inside of the panel through the exhaust hole, the exhaust path from the discharge cell to the exhaust hole is shortened, which can effectively shorten the time required for the exhaust.

Claims (9)

First and second substrates arranged in parallel at any interval; A plurality of address electrodes covered with a dielectric layer on the first substrate; Partition walls disposed between the substrates in a display area set on the substrates to form a discharge space, the partition walls including an outermost partition wall positioned at the outermost part of the display area; A fluorescent layer formed in the discharge space; A plurality of discharge sustaining electrodes covered with a dielectric layer on one surface of the second substrate facing the first substrate; A frit provided at edges of the substrates to seal the substrates; And An exhaust hole provided in one of the first and second substrates on a non-display area surrounding the display area, And a distance between the outermost partition and the exhaust hole in a direction from the edge of the display area toward the frit is greater than the distance between the exhaust hole and the frit. The method of claim 1, The outermost partition wall is positioned at the outermost part of the display area along the major axis direction of the substrates, and the plasma display is configured such that the gap between the outermost partition wall and the exhaust hole is greater than the gap between the exhaust hole and the frit along the major axis direction of the substrates. panel. The method of claim 2, And the exhaust hole satisfies the following conditions. Here, d1 and d2 represent the distance between the outermost partition wall and the exhaust hole and the distance between the exhaust hole and the frit along the long axis direction of the substrates, respectively. The method of claim 2, And a center point of the exhaust hole is located on the same line as an end of the outermost partition wall along the long axis direction of the substrates from one end of the outermost partition wall along the major axis direction of the substrates. The method of claim 2, And a center point of the exhaust hole is disposed at an arbitrary distance from one end of the outermost partition wall along the long axis direction of the substrates toward a direction away from the outermost partition wall along the short axis direction of the substrates. The method of claim 1, The outermost partition wall is located at the outermost portion of the display area along the short axis direction of the substrates, and the plasma display is configured such that a gap between the outermost partition wall and the exhaust hole in the short direction of the substrates is larger than a gap between the exhaust hole and the frit. panel. The method of claim 6, And the exhaust hole satisfies the following conditions. Here, d4 and d5 represent the distance between the outermost partition wall and the exhaust hole along the short axis direction of the substrates, and the distance between the exhaust hole and the frit, respectively. The method of claim 6, And a center point of the exhaust hole is located on the same line as an end of the outermost partition wall along the short axis direction of the substrates from one end of the outermost partition wall along the shorter direction of the substrates. The method of claim 6, And a center point of the exhaust hole is disposed at an arbitrary distance from one end of the outermost partition wall along the short axis direction of the substrates toward a direction away from the outermost partition wall along the long axis direction of the substrates.