KR100599706B1 - Plasma display panel - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display panel capable of improving conduction of exhaust gas so that impurity gas does not remain inside the PDP after exhausting, thereby preventing poor discharge caused by impurity gas and improving screen quality.

Accordingly, the present invention includes a first substrate and a second substrate disposed to face each other at arbitrary intervals; Discharge cells positioned in the display area set between the first substrate and the second substrate in the substrates; Electrodes provided in the respective discharge cells to induce plasma discharge; A sealing material surrounding the display area and the non-display area outside the display area and bonding edges of the first substrate and the second substrate to each other; And an exhaust duct formed in a length direction on an opposing surface of at least one of the opposing surfaces of the first and second substrates corresponding to the non-display area.

Board, non-display area, exhaust duct, sealing material

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

1 is a plan view showing a plasma display panel according to an 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 schematic side cross-sectional view of a plasma display panel according to an embodiment of the present invention;

4 and 5 are partially exploded perspective views and assembly plan views of the plasma display panel according to the related art, respectively.

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having a substrate structure capable of increasing the exhaust efficiency of the panel and minimizing impurities in the panel.

In general, a plasma display panel (PDP) is a display device for realizing an image by exciting phosphors by vacuum ultraviolet rays caused by gas discharge occurring in a discharge cell. It is getting the spotlight as next generation thin display device.

4 is a partially exploded perspective view showing an AC PDP having a three-electrode surface discharge structure, which is one type of PDP. Referring to the drawings, in the conventional AC PDP, an address electrode 3, a partition 5, and a fluorescent layer 7 are formed on the rear substrate 1 corresponding to each discharge cell, and scanned on the front substrate 9. The discharge holding electrode 15 which consists of the electrode 11 and the display electrode 13 is formed. The address electrode 3 and the discharge sustain electrode 15 are covered with respective dielectric layers 17 and 19 to generate wall charges, and the MgO passivation layer 21 is disposed on the dielectric layer 19 covering the discharge sustain electrode 15. This is located.

The PDP contains many impurity gases in its own form in the form of MgO and a porous phosphor having high moisture adsorption, and these impurity gases remain in the PDP, particularly affecting the life characteristics, thereby causing problems such as permanent afterimage and discharge instability. May cause. Therefore, the impurity gas must be removed to the outside through the exhaust process.

For this purpose, in the PDP having the above-described configuration, the front substrate 1 and the rear substrate 9 are integrally bonded at the edges by a sealing material 23 such as a frit as shown in FIG. An exhaust port 27 is formed in any one substrate on the non-display area 25, for example, the rear substrate 1, to enable injection of exhaust gas and discharge gas. For reference, reference numeral 29 in the drawing denotes a display area in which discharge cells are provided to implement a substantial image.

Looking at the exhaust process in detail, the conventional exhaust process is a primary exhaust step to exhaust the inside of the PDP to approximately 10 ^-7 Torr by connecting the exhaust port 27 with the exhaust device, and purge inside the PDP through the exhaust port 27 A purge step is performed in which a gas (eg, Ne gas) is injected and then exhausted to remove impurities in the PDP.

However, in the conventional PDP, since the diameter of the exhaust port 27 is narrow to about 2 to 3 mm, it takes a long time of about 15 to 20 hours to exhaust the inside of the PDP, and in particular, when conducting the purge gas, the conduction of gas is exhausted. ) Is not good and impurity gas remains inside the PDP.

Here, the conduction refers to the ability to pass a given amount of gas at a given time. When the conduction is not good, the path of the gas is long and narrow, and there are many curved portions. In consideration of this, since a large number of partitions 7 are formed inside the PDP to divide the discharge cells, the conduction of gas is not good, especially when using a narrow exhaust port in a high quality PDP having a small pitch between discharge cells. The efficiency is further lowered.

As such, when the conduction of the gas is not good and the impurity gas remains inside the PDP, a poor discharge occurs when the PDP is driven after the discharge gas is injected. Poor discharge appears in various places on the PDP screen in the form of discharge spots, or in the form of dots or lines, which seriously degrades the screen quality.

 Therefore, the present invention is to solve the above problems, the object of the present invention is to improve the screen quality by suppressing the poor discharge by the impure gas by improving the conduction of the exhaust gas so that the impurity gas does not remain inside the PDP after exhausting It is to provide a plasma display panel that can be made.

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

First and second substrates opposed to each other, discharge cells positioned in a display region set between the first and second substrates, electrodes provided in each discharge cell to induce plasma discharge, A sealing material for joining edges of the first substrate and the second substrate to surround the display area and the non-display area outside the display area, and at least one of the opposing surfaces of the first and second substrates corresponding to the non-display area; Provided is a plasma display panel including an exhaust duct extending in a longitudinal direction on a surface thereof.

The exhaust duct may be formed in various sizes according to the size of the plasma display panel and the width of the non-display area, and is preferably formed in a length of about 30 to 60 cm.

Also, preferably, the exhaust duct may be formed to have a width of 3-7 cm.

Accordingly, the conduction of the impurity gas can be increased through the exhaust duct of a larger area.

In addition, the present invention has a structure in which a sealing material is further provided outside the exhaust duct to seal between the exhaust duct and the exhaust device during the exhaust process.

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

1 is a plan view showing a plasma display panel according to an embodiment of the present invention, Figure 2 is a partially exploded perspective view of a plasma display panel according to an embodiment of the present invention, Figure 3 is a plasma display according to an embodiment of the present invention A schematic side cross-sectional view of the panel.

According to the above drawings, in the plasma display panel (hereinafter referred to as 'PDP') according to the present embodiment, the first substrate 2 and the second substrate 4 are disposed to face each other at random intervals, Discharge cells 6R, 6G, and 6B filled with discharge gas (mainly Ne-Xe mixed gas) are provided in the interspace, so that any color image can be generated by the visible light emission by the independent discharge mechanism of each discharge cell 6R, 6G, 6B. Implement

In detail, the address electrodes 8 are formed in one direction (Y direction of the drawing) on the inner surface of the first substrate 2, and cover the address electrodes 8 to cover the first substrate 2. The first dielectric layer 10 is formed on the entire inner surface. The address electrodes 8 are formed in a stripe pattern, for example, and are arranged side by side with a predetermined distance from the neighboring address electrodes 8.

On the first dielectric layer 10, a partition 12, for example, a grid-shaped partition 12 is formed to independently partition each discharge cell 6R, 6G, 6B, and the four sides and the first side of the partition 12. 1 Red, green, or blue fluorescent layers 14R, 14G, 14B are applied over the top surface of dielectric layer 10. At this time, the shape of the partition wall 12 is not limited to the above-described lattice shape, and a stripe pattern parallel to the address electrode 8 or other shape is possible.

On the inner surface of the second substrate 4 opposite to the first substrate 2, a discharge composed of the scan electrode 16 and the display electrode 18 is arranged along a direction orthogonal to the address electrode 8 (the X direction in the drawing). The sustain electrode 20 is formed, and the second dielectric layer 22 and the MgO passivation layer 24 that are transparent are disposed on the entire inner surface of the second substrate 4 while covering the discharge sustain electrodes 20.

As described above, the first and second substrates 2 and 4 positioned with the discharge cells 6R, 6G, and 6B interposed therebetween are integrally joined at edges by a sealant 26 such as a frit, and then into the sealant 26. The display area 28 and the non-display area 30 are provided. The display area 28 refers to an area in which discharge cells 6R, 6G, and 6B are provided to implement a substantial image when the PDP is driven. The non-display area 30 does not include discharge cells 6R, 6G, and 6B. It means the area where an image is not implemented.

The PDP according to the present invention extends along the non-display area along the non-display area of at least one of the opposing surfaces of the first and second substrates 2 and 4 corresponding to the non-display area 30 to extend the substrate. The exhaust duct 40 penetrates.

The exhaust duct 40 is formed in a straight long slit structure where the terminal is not formed in the non-display area 30 on the first substrate 2 or the second substrate 4. desirable.

For example, when the exhaust duct is to be formed on the first substrate on which the address electrode is to be formed, the non-display of the side without the driving circuit is made by a single driving method in which the driving circuit for driving the address electrode is provided on only one side of the substrate. An exhaust duct is formed in the area, or in the double driving method, an exhaust duct is formed in a non-display area in which the address electrode does not pass in parallel with the address electrode.

This is because one end of the address electrode extends through the non-display area to the terminal area outside the sealing material and is connected to the driving circuit board, and thus, when the exhaust duct is formed, it may interfere with the terminal passing through the non-display area.

Similarly, in the case where the exhaust duct is formed on the second substrate on which the scan electrode and the display electrode are formed, the exhaust duct is formed in the non-display area on the side where there is no driving circuit for driving the whole country.

2 exemplarily illustrates that the exhaust duct 40 is formed on the first substrate 2 as an example. In this figure, the address electrode 8 passes in the Y-axis direction and the exhaust duct 40 is formed in one of both non-display areas 30 along the X-axis direction in which the address electrode does not pass.

The size of the exhaust duct 40 may vary depending on the size of the non-display area of the substrate to form the exhaust duct, and preferably, the width of the exhaust duct 40 is 3 to 7 cm in a length of 30 to 60 cm.

On the other hand, the outer surface of the substrate (2, 4) on which the exhaust duct 40 is formed, the airtight of the exhaust device 50 and the exhaust duct 40 during the exhaust process by the exhaust device 50, as shown in FIG. The sealing material 41 is further provided along the outer side of the exhaust duct 40 so as to maintain the shape.

Therefore, the exhaust device 50 is in close contact with the substrates 2 and 4 through the sealing material 41, so that the inside of the substrate may be completely blocked from the outside during the exhaust process, that is, during vacuum adsorption by the exhaust device.

Exhaust conduction by size of exhaust duct in the exhaust process using the exhaust duct is shown in Table 1 below.

TABLE 1

Exhaust Duct Length Exhaust Duct Width Exhaust conduction 30 Cm 3 Cm 4 × 10 ^-5 (ℓ / sec) 40 Cm 4 Cm 9.5 × 10 ^-5 (ℓ / sec) 50 cm 5 cm 5 × 10 ^-5 (ℓ / sec) 60 Cm 6 Cm 8.5 × 10 ^-5 (ℓ / sec)

As can be seen from the above table, the exhaust can be more efficiently exhausted by the exhaust duct.

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

As described above, according to the present invention, the conduction effect of the exhaust gas is improved by the exhaust duct, which shortens the exhaust time of the panel and increases the exhaust efficiency.

As a result, even in a high-definition panel having a smaller pitch between discharge cells, excellent exhaust effect is obtained.

And as the conduction effect of the exhaust gas is improved, it is possible to minimize the impurity gas inside the panel.

Therefore, the present invention has the effect of improving the screen quality by suppressing the discharge failure caused by the impure gas.

Claims (4)

A rear substrate and a front substrate disposed to face each other at an arbitrary interval; Discharge cells positioned between the rear substrate and the front substrate in a display area set on the substrates; Electrodes provided in the respective discharge cells to induce plasma discharge; A sealing material surrounding the display area and the non-display area outside the display area and bonding edges of the rear substrate and the front substrate; And A plasma display panel including an exhaust duct penetrating through the substrate in a slit form along the non-display area on an opposite surface of at least one of the opposite surfaces of the rear substrate and the front substrate corresponding to the non-display area; The method of claim 1, The exhaust duct is formed in the plasma display panel 30 to 60cm long. The method of claim 1, And the exhaust duct is formed to have a width of 3 to 7 cm. The method according to any one of claims 1 to 3, And a sealing material further disposed outside the exhaust duct to maintain airtightness between the exhaust duct and the exhaust apparatus during the exhaust process.

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