KR100578921B1 - Plasma display panel having improved efficiency of exhaust - Google Patents

Abstract

 The present invention relates to a plasma display panel having a partition structure which improves the exhaust efficiency in the sealing exhaust process during the panel manufacturing process.

According to an embodiment of the present invention, a plasma display panel includes: a first substrate and a second substrate disposed to face each other; Discharge sustain electrodes formed on the first substrate; Address electrodes formed on the second substrate so as to intersect with the discharge sustain electrodes; A partition wall disposed between the first substrate and the second substrate to partition a plurality of discharge cells; And a phosphor layer formed in each of the discharge cells, and a passage is formed between the discharge cells adjacent in the diagonal direction.

Plasma, exhaust, bulkhead, passage, discharge cell

Description

Plasma display panel with improved exhaust efficiency {PLASMA DISPLAY PANEL HAVING IMPROVED EFFICIENCY OF EXHAUST}

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

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

3 is a partial cross-sectional view taken along line III-III of FIG. 2.

4 is a partial plan view illustrating a modified example of the plasma display panel according to the exemplary embodiment of the present invention with only partition walls.

FIG. 5 is a schematic diagram showing an arrangement of phosphors of a plasma display panel according to an exemplary embodiment of the present invention. FIG.

6 is a schematic diagram showing a phosphor array of a plasma display panel according to another embodiment of the present invention.

7 is a schematic diagram briefly illustrating a shape in which an exhaust hole is formed in a second substrate of a PDP according to an exemplary embodiment of the present invention.

8 is a partially exploded perspective view of a conventional 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 a partition structure having improved exhaust efficiency in a sealing exhaust process during a panel manufacturing process.

Plasma Display Panel (hereinafter referred to as 'PDP') is an apparatus that forms an image by phosphors excited by plasma discharge, and applies a predetermined voltage to two electrodes provided in the discharge space of the PDP. The plasma discharge is caused to occur, and the phosphor layer formed in a predetermined pattern is excited by ultraviolet rays generated during the plasma discharge to form an image. Such PDPs can be broadly classified into AC type, DC type, and hybrid type.

8 is a partially exploded perspective view illustrating a panel having a closed partition structure among conventional AC PDPs.

Referring to the drawings, the conventional PDP 100 includes a back substrate 104, an address electrode 102 formed on the back substrate 104, and a dielectric layer 103 formed on the back substrate 104 on which the address electrodes 102 are formed. And a plurality of partitions 101 formed on the dielectric layer 103 to maintain a discharge distance and preventing cross talk between cells, and a phosphor layer 105 formed in a discharge cell surrounded by the partitions 101. do. In particular, the PDP includes a plurality of horizontal partitions 1011 where the partitions 101 vertically intersect the address electrode 102 and vertical partitions 1012 that vertically intersect the horizontal partitions 1011. The closed barrier rib structure further extends the phosphor coating area in the discharge cell by further utilizing the horizontal barrier rib 1011 as compared with the conventional stripe barrier rib structure in which a plurality of barrier ribs are formed only in the address electrode direction. Ultraviolet rays generated by the plasma discharge in the excitation of phosphors more efficiently improve discharge characteristics.

In addition, the discharge sustaining electrodes 107 and 108 are spaced at a predetermined interval from the address electrode 102 formed on the rear substrate 104 and are orthogonal to each other to form a pair of discharge sustaining electrodes for one discharge cell. Is formed. The dielectric layer 109 and the passivation layer 106 sequentially cover the discharge sustaining electrodes 107 and 108.

In the PDP 100 having the above-described configuration, the front substrate 110 and the rear substrate 104 are edge-bonded by a sealing material such as a frit to complete one panel, and a non-display area in which discharge cells are not formed. An exhaust port is formed in one of the substrates, for example, the back substrate 104, to enable the injection of exhaust gas and discharge gas.

On the other hand, when the exhaust process in detail, the conventional exhaust process is a primary exhaust step of exhausting the inside of the panel to approximately 10 ^-7 Torr by connecting the exhaust port with the exhaust device, and purge gas inside the panel through the exhaust port A purge step is performed to remove impurities in the panel by injecting (for example, Ne gas) and then evacuating again.

However, in the PDP having the conventional closed partition structure as described above, the partition wall surrounds the discharge cells in all directions, so that the conduction of the gas is not good when the purge gas is exhausted so that impurity gas remains in the PDP. do. As such, when the conduction of the gas is not good and the impurity gas remains in the PDP, a bad discharge may occur when the PDP is driven after the discharge gas is injected, and such a bad discharge may appear in various places on the PDP screen in the form of discharge stains. In the form of dots or lines, the screen quality is severely degraded.

Therefore, it is necessary to maintain the advantages of the closed barrier rib structure while improving the discharge efficiency due to the reduction of discharge failure rate due to residual impurities.

The present invention was devised to solve the above problems, and its object is to communicate between adjacent discharge cells in a diagonal direction, so that the exhaust gas does not partially remain in the panel during the exhaust process of the panel, and the overall uniform exhaust efficiency is achieved. It is to provide a plasma display panel that can achieve.

In order to achieve the above object, a plasma display panel according to an exemplary embodiment of the present invention includes: a first substrate and a second substrate facing each other; Discharge sustain electrodes formed on the first substrate; Address electrodes formed on the second substrate so as to intersect with the discharge sustain electrodes; A partition wall disposed between the first substrate and the second substrate to partition a plurality of discharge cells; And a phosphor layer formed in each of the discharge cells, and a passage is formed between the discharge cells adjacent in the diagonal direction.

In this case, the discharge cells may be formed to be connected to discharge cells adjacent to each other in one diagonal direction to the passage, and to be closed with discharge cells adjacent to the other diagonal direction crossing the diagonal direction in which the passage is formed. .

The partition wall forming the passage is close to the height of the partition wall forming the discharge cell, and the passage is formed lower than the height of the partition wall.

The partition wall includes a first partition member formed to be parallel to the direction in which the address electrode extends, a second partition member formed to cross the direction in which the address electrode extends, and a passage partition member to form the passage in a diagonal direction. The first barrier rib member of one of the discharge cells may be integrally connected to each other through the passage barrier member and the second barrier member of the other discharge cell that are in communication with each other in a diagonal direction.

The partition wall is integrally formed by connecting the first partition member formed in parallel in the direction in which the address electrode extends and the second partition member formed to intersect the direction in which the address electrode extends to partition the discharge cells. A passage groove for communicating the discharge cells adjacent to each other in the diagonal direction at the intersection of the first partition member and the second partition member may be formed.

On the other hand, red, green, and blue phosphor layers are sequentially formed in the discharge cells adjacent to each other along the direction in which the discharge sustaining electrode extends, and phosphor layers of the same color are formed in the discharge cells communicating in the diagonal direction. Can be formed.

In addition, red, green, and blue phosphor layers are sequentially formed in the discharge cells adjacent to each other along the direction in which the discharge sustaining electrode extends, and discharge cells adjacent along the direction in which the address electrode extends. The phosphor layer of the same color can be formed.

Preferably, at least one exhaust hole is formed in the first substrate or the second substrate of the plasma display panel having the above structure near the corner of the diagonal direction in which the passage is formed.

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

1 is a partially exploded perspective view showing a plasma display panel according to an embodiment of the present invention, Figure 2 is a partial plan view showing a plasma display panel according to an embodiment of the present invention.

As shown, the plasma display panel according to the present embodiment (hereinafter referred to as 'PDP') basically has the first substrate 10 and the second substrate 20 disposed to face each other at a predetermined interval, and both substrates. A plurality of discharge cells 27 are partitioned by the partition walls 25 so as to cause plasma discharge in the spaces between the 10 and 20, and discharge sustaining electrodes are formed on the first substrate 10 and the second substrate 20. (12, 13) and address electrodes 21 are disposed, respectively.

Specifically, first, a plurality of address electrodes 21 are formed along one direction (x-axis direction in the drawing) of the second substrate 20 on a surface facing the first substrate 10 of the second substrate 20. do. The address electrodes 21 are formed in a stripe shape and are formed in parallel with neighboring address electrodes 21 while maintaining a predetermined interval. A dielectric layer 23 is also formed on the second substrate 20 on which the address electrode 21 is formed. The dielectric layer 23 may be formed on the entire surface of the substrate while covering the address electrode 21. In the present embodiment, the stripe address electrode 21 is taken as an example, but the scope of the present invention is not limited thereto, and the shape of the address electrode to be applied may be variously changed.

In the discharge cells 27, phosphors of red (R), green (G), and blue (B) colors are respectively applied to form the phosphor layer 29.

The discharge sustaining electrodes 12 and 13 formed on the first substrate 10 are paired to each discharge cell 27 along a direction crossing the address electrode 21 (y-axis direction in the drawing). Bus electrodes 12b and 13b disposed to correspond to each other, and protruding electrodes 12a and 13a extending from the bus electrodes 12b and 13b toward the center of the respective discharge cells 27 so as to face each other. It is done by The protruding electrodes 12a and 13a play a role of causing plasma discharge in the discharge cell 27. Preferably, the protruding electrodes 12a and 13a are made of indium tin oxide (ITO), which is a transparent electrode to secure luminance, but is not limited thereto. It may also be made of an opaque electrode.

A dielectric layer 15 may be formed on the first substrate 10 while covering the discharge sustain electrodes 12 and 13, and a protective layer 16 may be further formed to cover and protect the dielectric layer 15.

On the other hand, in the PDP according to the present embodiment, passages 30 are formed between the discharge cells 27 adjacent to each other in the diagonal direction. As shown in the figure, the discharge cells 27 are connected to the discharge cells adjacent to one side diagonal direction and the passage 30, and adjacent to the other diagonal direction crossing the diagonal direction in which the passage 30 is formed. The discharge cell 27 is closed.

The partition wall 25 partitioning the discharge cells may include a first partition member 25a formed in parallel in a direction in which the address electrode 21 extends (the x-axis direction in the drawing), and a direction in which the address electrode 21 extends. And a second partition wall member 25b formed to intersect, and a passage partition wall member 25c forming the passage 30 in a diagonal direction.

At this time, the first partition wall member 25a of one of the discharge cells 27 connects the second partition wall member 25b and the passage partition wall member 25c of the other discharge cell 27 to communicate with each other in a diagonal direction. Connected to each other through is formed integrally. Accordingly, when the panel is viewed as a whole, the discharge cells 27 are partitioned with a plurality of partition walls 25 adjacent to each other in a diagonal shape along the diagonal direction of the panel having a long side portion and a short side portion and adjacent to each other. Done.

Referring to the cross-sectional view of FIG. 3, the passage partition member 25c is formed close to the height of the first partition member 25a constituting the discharge cell 27, and the passage 30 is lower than the passage partition member 25c. Is formed. The depth of the passage 30 may vary depending on the design and process conditions of the barrier rib manufacturing process, and may be formed as much as the maximum depth of the discharge cell 27. Here, the depth of the passage 30 or the discharge cell 27 may be defined as the distance measured from the upper end of the partition member constituting them to the bottom of the inside thereof.

4 is a partial plan view showing a modified example of the plasma display panel according to an embodiment of the present invention.

As shown, the partition wall 35 partitioning the discharge cells 27 in the present modification includes a vertical partition wall member 35a formed side by side in the direction in which the address electrode 21 extends, and the address electrode 21 The horizontal partition wall members 35b formed to intersect the extended direction are integrally formed while being connected to each other.

At this time, the discharge cells 27 adjacent to each other in the diagonal direction communicate with each other through the passage 32, which is a passage groove at the intersection of the vertical partition member 35a and the horizontal partition member 35b. Is done. The passage groove is formed in the shape of a groove on the top surface of the partition member, it is connected to the discharge cells 27 to communicate with each other.

5 is a schematic diagram showing a phosphor array of a PDP according to an embodiment of the present invention.

In the present embodiment, the phosphor layer is formed on the red (R), green (G), and discharge cells 27 adjacent to each other along the direction in which the discharge sustain electrodes 12 and 13 extend (the x-axis direction of the drawing). Phosphors of blue (B) color are formed while being repeatedly arranged in this order, and phosphor layers of the same color are formed in the discharge cells communicating in the diagonal direction, as shown in FIG. Therefore, the phosphor layer of the same color is formed along the one diagonal direction in which the passage is generally formed.

The phosphor layer arrangement may be applied to both the PDP according to the embodiment described with reference to FIGS. 1 to 3 and the PDP according to the modification described with reference to FIG. 4.

6 is a schematic diagram showing a phosphor array of a PDP according to another embodiment of the present invention.

In the present embodiment, the phosphor layer is formed on the red (R), green (G), and discharge cells 27 adjacent to each other along the direction in which the discharge sustain electrodes 12 and 13 extend (the x-axis direction of the drawing). Phosphors of blue (B) color are formed while being repeatedly arranged in this order, and phosphor layers of the same color are formed in discharge cells 27 adjacent to each other along the direction in which the address electrode 21 extends (y-axis direction in the drawing). Is formed. Therefore, as a whole, the phosphor layer strips extending in parallel with the address electrode 21 are arranged in parallel.

The phosphor layer arrangement may be applied to both the PDP according to the embodiment described with reference to FIGS. 1 to 3 and the PDP according to the modification described with reference to FIG. 4.

7 is a schematic diagram briefly illustrating a shape in which an exhaust hole is formed in a second substrate of a PDP according to an exemplary embodiment of the present invention.

As shown in the drawing, at least one exhaust hole 40 is formed in the PDP provided with a passage by the partition wall 25 near a corner of the diagonal direction in which the passage is formed in the second substrate 10. As a result, the flow direction of the exhaust fluid and the position of the exhaust hole 40 are harmonized to shorten the exhaust path, thereby maximizing the exhaust efficiency.

The exhaust hole 40 may be formed on the first substrate 10 as long as it can communicate with the passage, and may be formed on one or both corners in the diagonal direction.

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 scope of the invention.

As described above, according to the plasma display panel having improved exhaust efficiency according to the present invention, it is possible to smoothly exhaust the inside of the panel during the sealing and exhausting process of the panel by forming a passage between adjacent discharge cells in a diagonal direction. As a result, the display quality can be improved by minimizing residual impurity gas inside the panel.

Claims (8)

A first substrate and a second substrate disposed to face each other; Discharge sustain electrodes formed on the first substrate; Address electrodes formed on the second substrate to intersect the discharge sustain electrodes; A partition wall disposed between the first substrate and the second substrate to partition a plurality of discharge cells; And A phosphor layer formed in each of the discharge cells, The partition wall may include: a first partition member formed in parallel in a direction in which the address electrode extends; A second barrier member formed to cross the direction in which the address electrode extends; And And a passage barrier member that continuously defines a passage in a diagonal direction of discharge cells partitioned by the first barrier member and the second barrier member. The method of claim 1, And the discharge cells are connected to discharge cells adjacent to each other in one diagonal direction and the passages, and closed from discharge cells adjacent to other diagonal directions crossing the diagonal directions in which the passages are formed. The method of claim 1, The barrier rib forming the passage is close to the height of the barrier rib forming the discharge cell, and the passage is formed lower than the height of the barrier rib. The method of claim 1, The partition wall And a first barrier rib member of one of the discharge cells is integrally connected to each other through the passage barrier member and the second barrier member of another discharge cell which is adjacently communicated in a diagonal direction. The method of claim 1, The partition wall And a passage groove for communicating discharge cells adjacent to each other in a diagonal direction at an intersection point of the first and second barrier members. The method of claim 1, The red, green, and blue phosphor layers are sequentially arranged in the discharge cells adjacent to each other along the direction in which the discharge sustaining electrode extends, And a phosphor layer of the same color is formed in the discharge cells communicating in the diagonal direction. The method of claim 1, The red, green, and blue phosphor layers are sequentially arranged in the discharge cells adjacent to each other along the direction in which the discharge sustaining electrode extends, And a phosphor layer of the same color is formed in discharge cells adjacent to each other along the direction in which the address electrode extends. The method according to any one of claims 1 to 7, At least one exhaust hole is formed in the first substrate or the second substrate near a corner of the diagonal direction in which the passage is formed.

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