KR20050042365A - Plasma display panel - Google Patents

Abstract

According to the present invention, a plasma display panel is disclosed. The plasma display panel includes a first and a second substrate facing each other to form a discharge space, a plurality of pairs of discharge sustain electrodes provided on the first substrate, a plurality of address electrodes provided on the second substrate, and a discharge space. A plasma display panel having partition walls partitioned into a plurality of cell spaces, wherein at least part of the partition walls is formed with an exhaust passage communicating with the cell spaces. According to the disclosed plasma display panel, exhaust conductance can be improved while preventing crosstalk and poor application of phosphors.

Description

Plasma display panel {Plasma display panel}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having an improved structure to improve exhaust conductance while preventing crosstalk and phosphor coating. It is about.

The plasma display panel is a flat panel display panel which displays an image by using gas discharge phenomenon, and is excellent in various display capabilities such as display capacity, brightness, contrast, afterimage, and viewing angle. In addition, it is being spotlighted as a next-generation flat panel display panel that can replace a CRT because it is thin and can display a large screen.

The plasma display panel includes a first panel and a second panel opposed to the first panel.

The first panel includes a first substrate and a plurality of pairs of discharge sustaining electrodes formed on the first substrate.

On the other hand, the second panel is a second substrate disposed to be spaced apart from the first substrate to form a discharge space, a plurality of address electrodes formed on the second substrate to generate a discharge together with the discharge holding electrode; And a partition wall partitioning the discharge space into a plurality of discharge cells.

Here, the partition wall may be largely divided into a stripe type and a closed type. The stripe type divides the discharge space in the row direction. Therefore, in the stripe type, the cells belonging to each row are not divided. On the other hand, in the case of a closed type, for example a lattice type, the discharge space is partitioned in the row and column directions.

The plasma display panel is provided with the first panel and the second panel bonded and encapsulated as described above. In this case, the plasma display panel undergoes an exhaust process for discharging impurity gas and an encapsulation process for discharging the discharge gas. do. Here, the exhausting process is a process of sucking the internal gas from the vent provided on the rear side by using the vacuum pump while the plasma display panel is heated.

Here, when the purification of the inside of the plasma display panel is insufficient, the discharge gas charged later and the impurity gas remaining inside the panel are mixed to change the composition of the discharge gas, which causes the display operation to become unstable.

When the pattern of the barrier rib is provided in a stripe shape, as described above, since the barrier ribs are not separated between the cells belonging to the same row, the above-described exhaust process may be relatively easy.

By the way, according to the prior art, when the partition wall is provided in a closed type, as a result of the discharge cells being sealed by the partition panel and the first panel disposed thereon, smooth ventilation of the gas is inhibited and exhausting takes a long time, There is a problem that impurities remain in the discharge cells that are located relatively far from the vent.

In particular, in the high-precision, high-resolution plasma display panel, since the internal structure of the panel is high definition, the problem of exhausting the impurity gas is further increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and other problems, and an object thereof is to provide a plasma display panel having an improved structure of improving exhaust conductance.

It is another object of the present invention to provide an improved plasma display panel which prevents crosstalk and poor application of phosphors.

In order to achieve the above object, the plasma display panel of the present invention, the first and second substrates facing each other to form a discharge space, a plurality of pairs of discharge sustaining electrodes provided on the first substrate, and the second A plasma display panel comprising a plurality of address electrodes provided on a substrate, and a partition wall partitioning the discharge space into a plurality of cell spaces, wherein at least a portion of the partition wall is formed with an exhaust passage communicating with the cell space. It is done.

The exhaust passage may be provided with a recess formed in the partition wall.

Here, the exhaust passage may be provided at the center of the partition wall forming each cell space. The exhaust passage may have a width of 10 μm to 50 μm and a depth of 10 μm to 30 μm.

The plurality of cell spaces may be formed of discharge cells in which discharge is performed, and may also be formed of discharge cells in which discharge is performed and non-discharge cells in which discharge is not performed, and the discharge cells and non-discharge cells may be alternately arranged.

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

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

Referring to FIG. 1, a plasma display panel 30 according to an exemplary embodiment of the present invention is formed by bonding a first panel 10 and a second panel 20 to each other.

The first panel 10 serving as the display portion of the image includes a first substrate 11, a discharge sustaining electrode 12, a bus electrode 13, a first dielectric layer 14, and a protective layer 15.

The first substrate 11 may be provided as a glass substrate of glass material.

The discharge sustaining electrodes 12 may be formed in a predetermined pattern on the first substrate 11. For example, the pair of discharge sustaining electrodes 12 formed of two opposing electrodes may be arranged vertically and horizontally. Can be.

The discharge sustaining electrode 12 may be made of a transparent material, for example, indium tin oxide (ITO), in order to transmit visible light emitted from the fluorescent layer 25. The discharge sustain electrode 12 may be formed by sputtering or vacuum deposition.

One side of the discharge sustaining electrode 12 is connected to the bus electrode 13 to supply current to the discharge sustaining electrode 12. The bus electrode 13 may be formed of a metal material having excellent electrical conductivity, for example, aluminum, silver, or the like.

As shown in FIG. 1, a first dielectric layer 14 is formed on the first substrate 11 to cover the discharge sustaining electrode 12 and the bus electrode 13.

A protective layer 15 is provided on the first dielectric layer 14. The protective layer 15 protects the first dielectric layer 14 from ions or electrons and has a function as a cathode during discharge.

The second panel 20 includes a second substrate 21, an address electrode 22, a second dielectric layer 23, a partition 24, and a fluorescent layer 25.

The second substrate 21 may be provided as a glass substrate made of glass like the first substrate 11.

The plurality of address electrodes 22 may be formed in a predetermined pattern, for example, a stripe pattern, on the second substrate 21. Here, the longitudinal direction of the address electrode 22 is formed to be substantially orthogonal to the longitudinal direction of the bus electrode 13.

The second dielectric layer 23 is formed on the second substrate 21 to cover the address electrode 22.

The partition wall 24 is formed on the second dielectric layer 23. As shown in FIG. 1, the partition wall 24 extends in the x direction and the y direction, and may be provided in the shape of a well well, and the discharge cells 26 partitioned by the partition 24 may have a substantially rectangular shape. .

A fluorescent layer 25 is formed in the discharge cell 26, and the fluorescent layer 25 is applied on the side surface of the partition wall 24 on the second dielectric layer 23 corresponding to each discharge cell 26. It consists of a red fluorescent layer, a green fluorescent layer, and a blue fluorescent layer.

The fluorescent layer 25 may be formed by screen printing a phosphor paste for each emission color. Here, the screen printing is performed by pushing the paste into the squeeze using a screen mask in which the opening pattern is formed.

The first panel 10 and the second panel 20 may be bonded and encapsulated using, for example, frit glass, and thereafter, in order to remove impurities in the plasma display panel 30, the interior of the first panel 10 and the second panel 20 may be a vacuum pump. Exhaust that takes in gas is made. In addition, a process of filling a discharge gas into the inside of the plasma display panel 30 is performed. Here, as the discharge gas, an inert gas such as He, Ne, Xe, Ar, Kr, or the like may be used.

In the plasma display panel 30 configured as described above, according to an aspect of the present invention, an exhaust passage 100 communicating with the discharge cells 26 is formed in at least a portion of the partition wall 24.

The exhaust passage 100 may be provided as a recess formed in the partition wall 24. As shown in FIG. 1, the exhaust passage 100 is provided in the partition wall 24 extending in the y direction. It is formed in the substantially center of the partition wall 24 which forms each discharge cell 26. As shown in FIG.

During the exhaust of the panel 30, the impurity gas existing in the discharge cell 26 may be discharged to the outside of the panel 30 through the exhaust passage 100, and as shown in the drawing, the exhaust passage ( 100 may be formed in the partition wall 24 in the y direction to ensure an exhaust path in the x direction.

Here, the movement of the charged particles may easily occur in the direction of the address electrode 22 (y direction), and the movement of the charged particles may be prevented by the closed partition wall 24.

FIG. 2 is a cross-sectional view taken along line AA of the partition structure of FIG. 1.

Referring to the drawings, the exhaust passage 100 preferably has a width w of about 10 μm to about 50 μm, and the depth d is preferably about 10 μm to about 30 μm.

When the exhaust passage 100 is formed too narrow, the impurity gas can not be smoothly discharged to the outside of the panel 30 through the exhaust passage 100, the improvement effect of the exhaust conductance can be reduced.

On the other hand, if the exhaust passage 100 is formed to be larger than the appropriate size, the phenomenon that the phosphor paste flows into the adjacent discharge cells 26 through the exhaust passage 100 may occur in the process of applying the fluorescent layer 25 In this case, the emission colors may be mixed with each other, and the display color of the image may be blurred. In addition, since the charged particles may move to the adjacent discharge cells 26 through the exhaust passage 100, crosstalk may occur.

Therefore, the exhaust passage 100 is preferably suppressed to a minimum size that can sufficiently discharge the impurity gas.

By providing the exhaust passage 100 as described above, the exhaust path of the impurity gas is secured, and thus the compositional change of the discharge gas is prevented, so that a stable image can be obtained, and the luminance of the panel 30 and The fall of the driving efficiency can also be prevented.

In addition, as described above, by forming the exhaust passage 100 to a minimum size that does not interfere with the exhaust of the impurity gas, it is possible to prevent the movement of the charged particles, crosstalk can be prevented, and the mixed color of the phosphor Deterioration of image quality due to this can also be prevented.

3 shows another embodiment of the present invention. Referring to the drawings, a discharge sustaining electrode 12 and a bus electrode 13 are formed on the first substrate 11, and the first dielectric layer 14 and the protective layer 15 filling the electrodes 12 and 13 are embedded. This is sequentially stacked. Here, the discharge sustaining electrode 12 is formed in the discharge cell 27a in which discharge is performed, and is not formed in the non-discharge cell 27b in which discharge is not performed.

In addition, an address electrode 22 and a second dielectric layer 23 buried therein are formed on the second substrate 21, and a partition wall 24 having a substantially well sperm shape is provided to partition the plurality of cell spaces 27. do. Here, the plurality of cell spaces 27 formed by the partition wall 24 are composed of a discharge cell 27a in which discharge is performed and a non-discharge cell 27b in which discharge is not performed. In addition, the discharge cells 27a and the non-discharge cells 27b are alternately arranged.

An exhaust passage 100 is formed in the partition 24, and the exhaust passage 100 may be provided as a recess formed in the partition 24.

Through the exhaust passage 100, an exhaust path of the impurity gas is secured, and the exhaust conductance of the panel 30 may be improved.

In addition, while the exhaust path is secured, the exhaust passage 100 communicates with the discharge cell 27a and the non-discharge cell 27b in which discharge is not performed, thereby preventing movement of the charged particles between the discharge cells 27a. Therefore, crosstalk due to this can be prevented.

In FIG. 3, the exhaust passage 100 is formed only in the partition wall 24 extending in the y direction, but may also be formed in the partition wall 24 extending in the x direction. In this case, the impurity gas of the cell space 27 can be discharged in both directions, so that the exhaust conductance can be further improved.

Further, as described above, as a result of the non-discharge cells 27b disposed around the discharge cells 27a, crosstalk can be prevented.

In the plasma display panel of the present invention, the exhaust conductance of the display panel can be improved by forming an exhaust passage in the partition wall partitioning the cell space. Therefore, the exhaust path of the impurity gas can be secured, and in particular, the impurity gas in the cell space located relatively far from the exhaust hole can also be smoothly exhausted.

When the composition change of the discharge gas due to the impurity gas is prevented, a more stable image can be obtained, and the brightness and driving efficiency of the plasma display panel can be improved.

In addition, since the process of exhausting the impure gas and the filling process of the discharge gas can be made easily and quickly, the work efficiency can be improved and the manufacturing cost can be reduced.

When the exhaust passage of the present invention is formed to the minimum size that can be sufficiently exhausted, while the exhaust path of the impure gas is secured, the movement of the charged particles can be suppressed, thereby preventing crosstalk.

In addition, if the exhaust passage is designed as described above, since the paste can be prevented from flowing to the adjacent cells through the exhaust passage during the phosphor coating process, mixing of the emission color due to the coating failure is prevented.

Although the present invention has been described with reference to the embodiments shown in the accompanying drawings, this is merely exemplary, and those skilled in the art to which the present invention pertains various modifications and equivalent other embodiments from this. You will understand the point. Therefore, the true scope of protection of the present invention should be defined by the appended claims.

1 is an exploded perspective view illustrating a plasma display panel according to an exemplary embodiment of the present invention;

2 is a cross-sectional view taken along the line A-A of the partition structure of FIG. 1;

3 is an exploded perspective view illustrating a plasma display panel according to another embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10 ... first panel 11 ... first substrate

12 Discharge holding electrode 13 Bus electrode

14 first dielectric layer 15 protective layer

20 ... Second panel 21 ... Second substrate

22 ... address electrode 23 ... second dielectric layer

24 ... Bulk 25 ... Fluorescent layer

26, 27a ... discharge cell 27 ... cell space

27b ... Non-discharge cell 30 ... Plasma display panel

100.Exhaust passage

Claims (6)

A plurality of first and second substrates facing each other to form a discharge space, a plurality of pairs of discharge sustain electrodes provided on the first substrate, a plurality of address electrodes provided on the second substrate, and a plurality of discharge spaces A plasma display panel having partition walls partitioning into cell spaces, comprising: And at least a portion of the barrier rib is provided with an exhaust passage communicating with the cell space. The plasma display panel of claim 1, wherein the exhaust passage is formed with a recess formed in the partition wall. The plasma display panel of claim 2, wherein the exhaust passage is provided at the center of the partition wall forming each cell space. The plasma display panel of claim 2, wherein the exhaust passage has a width of 10 μm to 50 μm and a depth of 10 μm to 30 μm. The plasma display panel of claim 1, wherein the plurality of cell spaces are formed of discharge cells in which discharge is performed. The plasma display panel of claim 1, wherein the plurality of cell spaces are formed of discharge cells in which discharge is performed and non-discharge cells in which discharge is not performed, and the discharge cells and non-discharge cells are alternately arranged.