KR20050122533A - Plasma display panel reduced noise - Google Patents

Abstract

The present invention prevents the vibrations transmitted between non-display discharge cells from increasing by resonance by varying the widths of at least one pair or more of the non-display discharge cells among the plurality of non-display discharge cells extending adjacent in the width direction, and accordingly the plasma To reduce the noise generated when driving the display panel,

In order to achieve the above object, the present invention is disposed between the front substrate and the rear substrate, which is disposed to face each other and face each other, and is disposed between the front substrate and the rear substrate, and generates visible light through plasma discharge A partition including a display partition defining display discharge cells for displaying an image and a non-display partition defining non-display discharge cells for not displaying an image, and a rear of the front substrate, a front of a back substrate, and an interior of the partition wall. Discharge electrodes disposed on at least one and a phosphor layer disposed inside the discharge cell; Width of each of the non-display discharge cells, wherein each of the unit non-display discharge cells shares at least a portion of the partition walls with the display discharge cells, and is a length of the unit discharge cells in a direction in which the shared partition walls extend; The plasma display panel of claim 1, wherein at least one pair of unit discharge cells of the plurality of unit non-display discharge cells that are adjacent to and extend in the width direction are different from each other.

Description

Plasma display panel with reduced noise {Plasma display panel reduced noise}

The present invention relates to a plasma display panel, and more particularly, vibrations transmitted between non-display discharge cells by varying the widths of at least one or more pairs of non-display discharge cells from among a plurality of non-display discharge cells extending adjacent in the width direction. It is an object of the present invention to prevent an increase in resonance and thereby reduce noise generated when the plasma display panel is driven.

Plasma display panels are devices that display images using gas discharge phenomena, and are excellent in various display abilities such as display capacity, brightness, contrast, afterimage, viewing angle, etc., and are being spotlighted as devices that can replace CRTs. In such a plasma display panel, a discharge is generated in a discharge cell filled with a discharge gas by a direct current or an alternating voltage applied between electrodes, and ultraviolet rays emitted from the discharge gas excite a phosphor to emit visible light, thereby realizing an image. do. The plasma display panel adopts a discharge mechanism that emits light by applying a high voltage to the discharge cell as a light emitting means, and a shock wave due to discharge is generated inside the discharge cell. Such a shock wave may hit the inner surfaces of the discharge cell, causing loud noise. If the noise is not generated, a number of problems such as a decrease in product value and a weak product competitiveness of the plasma display panel used as a home display device may occur.

The present invention solves the above problems, and the vibrations transmitted between the non-display discharge cells by resonance of at least one pair or more pairs of the non-display discharge cells of the plurality of non-display discharge cells extending adjacent in the width direction are caused by resonance. It is aimed at preventing it from becoming large and thereby reducing the noise generated when driving the plasma display panel.

In order to achieve the above object, the present invention is disposed between the front substrate and the rear substrate, which is disposed to face each other and face each other, and is disposed between the front substrate and the rear substrate, and generates visible light through plasma discharge A partition including a display partition defining display discharge cells for displaying an image and a non-display partition defining non-display discharge cells for not displaying an image, and a rear of the front substrate, a front of a back substrate, and an interior of the partition wall. Discharge electrodes disposed on at least one and a phosphor layer disposed inside the discharge cell; Width of each of the non-display discharge cells, wherein each of the unit non-display discharge cells shares at least a portion of the partition walls with the display discharge cells, and is a length of the unit discharge cells in a direction in which the shared partition walls extend; The plasma display panel of claim 1, wherein at least one pair of unit discharge cells of the plurality of unit non-display discharge cells that are adjacent to and extend in the width direction are different from each other.

Meanwhile, non-display discharge cells adjacent to the display discharge cells may be located at the outermost portion of the plasma display panel.

In addition, each of the unit non-display discharge cells of the non-display discharge cells share at least a portion of the partition wall with the display discharge cells, the width of the unit discharge cell in the direction in which the shared partition wall extends The widths of at least three or more unit discharge cells among the unit non-display discharge cells that are adjacent to and extend in the width direction among the plurality of unit non-display discharge cells are different from each other.

On the other hand, it is preferable that the width of the unit non-display discharge cell is larger than the width of the unit display discharge cell.

On the other hand, it is preferable that the cross section of the non-display discharge cells is in the shape of an arc having a predetermined curvature.

In addition, the discharge electrodes cross the sustain electrode pairs disposed across the discharge cell at the rear of the front substrate, intersect the sustain electrode pairs in the discharge cell, and the back substrate and the sustain electrode pairs. And a front dielectric layer covering the sustain electrode pairs and a rear dielectric layer covering the address electrodes.

On the other hand, the discharge electrodes are disposed in the partition wall and the front discharge electrodes extending in one direction, spaced apart from the front discharge electrodes in the partition wall, the rear discharge extending in parallel with the direction in which the front discharge electrodes extend The display device may further include an electrode disposed in front of the rear substrate, the address electrodes extending to intersect the front discharge electrodes and the rear discharge electrodes, and a dielectric layer covering the address electrodes.

Meanwhile, the discharge electrodes are disposed in the barrier rib and extend in one direction, and the rear discharge electrode is spaced apart from the front discharge electrodes in the barrier rib and intersects the direction in which the front discharge electrodes extend. An electrode can be provided.

Hereinafter, the plasma display panel of the present invention will be described with reference to FIGS. 1 to 6. FIG. 1 illustrates a noise generating area 20 generated when the plasma display panel 10 including the front panel 11 and the rear panel 12 is driven. When driving the plasma display panel, a shock wave is generated by discharge occurring in the discharge cells of the plasma display panel. The shock wave strikes the inside of the discharge cell, more specifically, the side surface of the partition wall, causing a loud noise to the plasma display panel. At this time, the generation region of the noise was observed, and it was confirmed that mainly occurs in the peripheral portion 20 of the plasma display panel. At this time, the position of the periphery shown in FIG. 1 coincides with a place where a non-display partition (also called a dummy partition) is disposed to prevent edge effects of discharge unevenness that may occur at the outermost portion of the plasma display panel. do. In this case, the non-display partition wall may be referred to as a non-display partition wall in the sense that it is not an area for displaying a screen. However, it is not necessary for electrodes to be disposed in the discharge cells defined by the non-display partition walls so that discharge can occur. In this case, the noise is concentrated where the non-display partition wall is disposed will be described with reference to FIGS. 2 to 3. FIG. 2 illustrates shrinkage directions 131 and 132 of the partition wall material involved in the firing process applied when the partition wall 130 of the plasma display panel is manufactured. In general, the partition wall is formed by placing a paste including the partition wall material in front of a specific layer disposed in front of the rear substrate and drying, and then, by arranging a predetermined pattern in front of the partition wall material by high-speed ceramic particles sprayed from the sandblaster. The partition wall material of the site is etched to form a predetermined shape and then fired to complete the partition wall. The firing process is carried out by heating the rear panel in a firing furnace formed so that the maximum temperature is slightly higher than the softening temperature of the partition material (approximately 550 degrees Celsius). Volatile matters contained in the partition material during the firing process are volatilized. It contracts at a predetermined shrinkage rate. In this case, when the partition wall 130 is contracted by the firing process, as shown in FIG. 2, the length of the partition wall is reduced in the contraction directions 131 and 132 toward the center of the plasma display panel, and the compressive stress according to the contraction is reduced. Will occur. At this time, the compressive stress applied to the partition walls before firing increases as the distance from the center portion of the plasma display panel increases. As a result, a large stress is generated in the non-display partition walls disposed at the outer portion of the plasma display panel. The stress is maximized at the non-display bulkhead disposed at the outer portion. Effects according to such stresses will be described with reference to FIG. 3. Referring to FIG. 3, in the non-display partition where stress is concentrated according to the shrinkage according to the firing process, in particular, the non-display partition of the outermost portion, a rotation moment is generated due to the stress, thereby raising the ridge 134 in the non-display partition. ) And the lifting 133 phenomenon occurs. The ridge and lift phenomenon occur most severely at the outermost end of the non-display partition wall because the outermost end of the non-display partition wall is farthest from the plasma display panel to generate the greatest stress concentration. As described above, when the bulge occurs in the partition wall, when the front panel and the rear panel are combined to manufacture the plasma display panel, the front panel of the bulge partition is not exactly matched to the outer portion of the plasma display panel. As a result, a gap is generated between the non-display partition and the front panel along the edge of the plasma display panel. Therefore, when the plasma display panel is driven, the shock wave generated inside the discharge cell positioned outside the plasma display panel or the discharge wave generated in the discharge cell positioned at the center of the plasma display panel is applied to the non-display partition wall positioned outside the plasma display panel. Transmitted to vibrate the non-display bulkhead, thereby causing the noise between the non-display bulkhead and the front panel to periodically collide between the non-display bulkhead and the front panel at the outside of the plasma display panel between the gaps generated by the bumps of the non-display bulkhead. Occurs. In addition, when the shock wave strikes the non-display partition of the outer portion of the plasma display panel due to the lifting phenomenon generated in the rear panel, the non-display partition is severely shaken, thereby causing the non-display partition to periodically hit the rear panel to cause severe impact. It generates noise.

Based on these theoretical considerations, the noise is eventually hit by the shock waves generated by the discharge directly hitting the non-display bulkhead where the bumps and lifts occur frequently, or the shock waves transmitted from the display partition are transmitted to the non-display bulkhead. By vibrating the display partition, it can be confirmed that the non-display partition and the front panel collide with the vibration, or the non-display partition is caused by the collision with the rear panel. On the other hand, the non-display partition wall is added to prevent the edge effect of the discharge, the discharge may occur, but the number is limited compared to the display discharge cells, and do not necessarily have to be designed so that the discharge, non-display discharge The vibration generated by the shock wave due to the discharge generated in the cell occupies much less than the shock wave caused by the discharge of the display discharge cells is transmitted to the non-display partition wall to vibrate. Therefore, in order to reduce the noise generated when the plasma display panel is driven, the vibration transmitted to the non-display partition wall is reduced, and the stress caused by the shrinkage of the partition wall material generated during the partition wall firing process is reduced, so that the ridge and the lifting phenomenon are generated. It may be important to reduce this to a minimum.

Further, as described above, since the vibration generated in the display discharge cell is transmitted to the non-display discharge cell, the generation of noise increases in the non-display partition wall, so that the vibration generated from the display discharge cell is reduced and transmitted to the non-display discharge cell. Although it is an important factor to reduce the noise, as mentioned above, the noise is generated by the periodic collision between the partition wall and the panel due to the bumps and the lifting phenomenon generated in the non-display partition wall. There is. In particular, when the vibration transmitted from the display discharge cell to the non-display discharge cell is transmitted between the non-display discharge cells and has a similar natural frequency between the non-display discharge cells, the vibration is the non-display discharge cells. The probability of amplification greatly between is increased. Therefore, even if the vibration transmitted from the display discharge cell to the non-display discharge cell is reduced, the vibration transmitted between the non-display discharge cells may not be reduced and noise may not be reduced. In order to solve this problem, it is necessary to design the non-display partition wall so that the natural frequencies transmitted between the non-display discharge cells are different from each other.

On the other hand, as described above, when the bumps and lifts occur in the non-display partitions, the noise is greatly generated. However, even when the bumps and lifts do not occur in the non-display partitions, the shock waves generated in the display discharge cells are not displayed. When delivered to the cell without any reduction or when the resonance frequency of the display discharge cell and the non-display discharge cell are the same, the vibration generated in the display discharge cell is further increased in the non-display discharge cell to increase the vibration of the plasma display panel. As a result, noise generation due to the vibration increases. Therefore, even when the above-mentioned bumps and lifts do not occur, vibrations generated in the display discharge cells can be prevented from being transmitted to the non-display discharge cells without reduction or increased due to resonance, so that they can occur in the plasma display panel. Noise can be reduced.

The plasma display panel 300 of the present invention derived through the theoretical considerations on the noise generation described above will be described with reference to FIG. 4 by way of example. 4 shows a plasma display panel 300 of the present invention. The plasma display panel 300 includes a front panel 310 and a rear panel 320. The front panel 310 includes a front substrate 311, a Y electrode 312 and an X electrode 313, which are part of a discharge electrode formed on the rear surface 311a of the front substrate, more specifically, on the rear surface 311a of the front substrate. One sustain electrode pair 314, a front dielectric layer 315 covering the sustain electrode pairs, and a passivation layer 316 covering the front dielectric layer are provided. The front dielectric layer induces charged particles by the voltage applied to the sustain electrode pair to induce wall charge for discharging, and the protective layer facilitates discharging by increasing the emission of secondary electrons during discharging, and the front dielectric layer And sustain electrode pairs to protect the plasma display panel. Each of the Y electrode 312 and the X electrode 313 includes transparent electrodes 312b and 313b formed of ITO or the like for transmitting visible light, and the transparent electrode is generally not used alone due to its high resistance. Bus electrodes 312a and 313a formed of a metal having conductivity are provided. In general, a predetermined potential is applied by the bus electrode, and a discharge occurs in the transparent electrode. The bus electrodes 312a and 313a are connected to a connection cable (not shown) disposed on the left and right sides of the plasma display panel 300.

The rear panel 320 is disposed between the rear substrate 321, the rear substrate 321, and the sustain electrode pairs 114, more specifically, in the discharge cell 326 on the front surface 321 a of the rear substrate. Address electrodes 322 formed to intersect the sustain electrode pair 314 which is part of the discharge electrode, and a rear dielectric layer 323 covering the address electrodes. The address electrode functions to cause an address discharge to select a discharge cell 326 in which an image is displayed by generating a discharge when driving the plasma display panel, and the rear dielectric layer has a predetermined voltage applied to the address electrode. When applied, the charged particles are induced, thereby generating wall charges so that an address discharge can occur, and thus the discharge cells 326 can be selected, but not necessarily required. In addition, the rear panel is disposed on the rear dielectric layer 323 of the display discharge cell 326a displaying the screen of the plasma display panel, and the display partition wall 330a and the plasma display defining the display discharge cell 326a. A partition wall 330 is provided including a non-display partition wall 330b that defines a non-display discharge cell 326b formed in consideration of discharge unevenness due to an edge effect that may occur at the outermost side of the panel. In this case, the discharge cells 326 are formed of unit discharge cells that are divided by the partition wall and thus the space in which discharge occurs is limited, and the space in which visible light is generated is divided.

 In this case, each of the unit non-display discharge cells of the non-display discharge cells 326b share at least part of the partition walls with the display discharge cells, and the unit discharge cells in the direction in which the shared partition walls extend. In the width (hereinafter, referred to as the width of the discharge cell), at least one pair of the unit discharge cells of at least one of the plurality of unit non-display discharge cells 326b adjacent to and extending in the width direction are different from each other. The non-display discharge cells 326b are disposed to be disposed. On the other hand, the shape of the non-display discharge cells is different from the shape of the display discharge cells, the difference in shape between the display discharge cells and the non-display discharge cells is generated in the outer portion of the plasma display panel due to the transmission characteristics of the vibration described later It can contribute to noise reduction. On the other hand, in a cross section (hereinafter referred to as a cross section) in which the front substrate and the back substrate extend in parallel, the shape of the cross section of the non-display discharge cells is preferably the shape of an arc having a predetermined curvature. On the other hand, the width of the non-display discharge cells, the shape of the cross section, and thus the reduction of noise generation will be described later in detail.

On the other hand, the partition wall 330 is applied to a predetermined voltage is applied to the plasma display panel, the plasma discharge due to the collision of the discharge gas particles and charge induced by the electric field induced by the voltage to generate an image to emit light The display discharge cells 326a and the non-display discharge cells 326b for preventing the edge effect are defined to form a basic unit of an image and to prevent cross talk between the discharge cells. In addition, the discharge cell is filled with a discharge gas (approximately 0.5 atm or less) of a vacuum lower than atmospheric pressure, and the partition wall 330 supports the pressure generated between the front panel and the rear panel. The discharge gas is filled with a discharge gas composed of any one of neon, helium (He), argon (Ar), or a mixture of two or more of these, including 10% xenon (Xe) gas. The shape and arrangement of the non-display partition wall will be described later.

The phosphor layer 325 is disposed in the discharge cell 326, and more specifically, the phosphor layer 325 is disposed in at least part of a space defined by the rear dielectric layer 323 and the partition wall. In this case, in order to enable the plasma display panel to realize a color image, red, green, and blue light emitting phosphor layers may be disposed in a discharge cell to form a unit pixel. The phosphor layer is dried and calcined after a phosphor paste in which any one of a phosphor, a solvent, and a binder of a red light emitting phosphor, a green light emitting phosphor, and a blue light emitting phosphor is mixed is applied to a part of the front side and the partition wall side of the rear dielectric layer in the discharge cell. It is formed by going through a process. Examples of the red light emitting phosphor include (Y, Gd) BO ₃ : Eu ³⁺ , and examples of the green light emitting phosphor include Zn ² Si 04: Mn ^{2 +,} and examples of the blue light emitting phosphor include BaMgAl ₁₀ O ₁₇ : Eu ²⁺ .

Generally, the partition wall 330 is formed by applying a thin partition material including a glass powder, an organic vehicle, and a paste having various fillers onto the rear dielectric layer by a screen printing method, and then patterning and firing a predetermined pattern. It is formed through a process. On the other hand, the patterning process may be made of a variety of processes, such as sandblasting, etching, laser etching, exposure method.

Referring to FIG. 5, the reason why the noise generated in the non-display partition wall in the plasma display panel 300 of the present invention is reduced will be described. As described above, most of the noise generated in the plasma display panel is concentrated at the periphery of the plasma display panel, and the noise is caused by the shock waves caused by the discharge generated in the display discharge cell 326a hitting the display partition wall 330a. The vibration is caused by vibrating the partition wall, and the vibration is transmitted to the non-display partition wall 330b along the display partition wall 330a to cause the non-display partition wall to vibrate. As a result, it is important to reduce the noise so that the vibration generated in the display partition 330a is transmitted to the non-display partition 330b to a minimum. At this time, the transmission of the vibration is generally affected by the shape, material, and the surrounding environment of the object that is the medium of the vibration transmission, the natural frequency of the object is determined by these factors. In this case, since the non-display partition wall and the display partition wall are formed under the same process, materials of the same material are generally used. Of course, the non-display partitions and the display partitions may be formed using materials of different materials, but are not preferable due to the addition of a process and waste of materials. On the other hand, since the non-display partition and the display partition are disposed inside the same plasma display panel, the non-display partition and the display partition may be considered to be in the same environmental condition. As a result, the natural frequencies of the non-display partition and the display partition may be determined by their shape. On the other hand, the transmission of vibration is affected by the natural frequency of the object, when the vibrating objects are in contact with each other so that the vibration can be transmitted, it depends on how close the natural frequencies between the objects in which the transmission of vibration occurs to each other, the natural frequency In the same case, resonance occurs between objects, and the vibration is the greatest. Therefore, it is an effective way to reduce the transmitted vibrations so that the natural frequencies are different from each other to which the vibrations are transmitted. Accordingly, it is advantageous to have different shapes between the non-display partition wall and the display partition wall based on this theoretical consideration. At this time, since the partition walls define the discharge cells and support the front panel and the rear panel, it is difficult to change the shape of the plasma display panel in the front and rear directions, and thus the shape of the cross section between the display partition wall and the non-display partition wall. It is desirable that these are different. Based on these theoretical considerations, when the cross-sections between the display partitions and the non-display partitions are different from each other, a substantial part of the noise generated in the plasma display panel can be reduced. It is preferable that the shape of the cross section of a display discharge cell is the shape of the arc which has a predetermined curvature.

 On the other hand, when the discharge occurs in the display discharge cell 326a and the shock wave caused by the discharge strikes the inner surface of the partition wall to generate vibration, the vibration is transmitted to the non-display partition wall of the non-display discharge cell. At this time, if the shape of the cross section of the non-display discharge cell is different from the shape of the cross section of the display discharge cell as described above, the natural frequencies are different from each other and vibration is reduced. However, the vibrations transmitted to the non-display discharge cells are transmitted to each other to the plurality of unit non-display discharge cells 326b that are adjacent and extend in the width direction. In this case, when the cross-sectional shapes of the non-display discharge cells are identical to each other, the vibrations are transmitted between the non-display discharge cells because the natural frequencies between the adjacent non-display discharge cells are the same or extremely similar. In addition, the vibration is increased to vibrate the non-display partition wall 330b, thereby increasing the noise. In order to prevent such an increase in noise, cross-sectional shapes of a plurality of unit non-display discharge cells that are adjacent to and extend in the width direction need to be different from each other. In this case, the widths Wa1 and Wa2 of at least one or more pairs of the unit non-display discharge cells that are adjacent and extend in the width direction are formed differently in order to change the shape of the cross section between the non-display discharge cells. Be sure to As described above, when at least one pair or more widths of the plurality of unit non-display discharge cells that are adjacent and extend in the width direction are different from each other, the vibration transmitted to any one of the adjacent pair of non-display discharge cells is adjacent to another one. When delivered to the non-display discharge cell of the width is different from each other and the natural frequency is different, thereby transmitting the transmission is attenuated. As a result, vibration generated in the non-display partition wall as a whole is reduced, and noise generated in the periphery of the plasma display panel, which is a region where the non-display discharge cells are arranged, is reduced. Meanwhile, in order to further reduce vibrations between the non-display discharge cells, the widths Wa1, Wa2, and Wa3 of three adjacent non-display discharge cells that are adjacent to each other and extend in the width direction are different from each other. As vibrations are sequentially transmitted to three adjacent discharge cells, the vibrations are further reduced, and noise generated at the periphery of the plasma display panel can be further reduced.

With reference to Figure 6 will be described the distribution of stress due to the shrinkage that occurs when the firing process is applied to the partition of the present invention. As described above, when the firing process is applied to form the partition wall, the partition wall contracts as the volatile material contained in the partition material is volatilized. At this time, the length of the partition wall material is reduced in the shrinking directions 331 and 332 toward the center of the plasma display panel, thereby causing compressive stress due to shrinkage. In this case, the compressive stress applied to the partition wall before firing increases as the distance from the center of the plasma display panel increases, and as a result, a large stress is generated in the non-display partition wall disposed at the outer portion of the plasma display panel. The stress is maximized at the non-display bulkhead disposed at the outer portion. However, when the shape of the non-display partition wall has an arc shape having a predetermined curvature as in the present invention, since the compressive stress acts along the shape of the soft arc, the compressive stress is distributed in a circular shape so that the bumps and lifting phenomenon of the partition wall are small. Lose. On the other hand, when the non-display discharge cells have an arc shape having a predetermined curvature so that the width of the non-display discharge cells is larger than the width of the display discharge cells, the partition wall of the non-display discharge cells at the outermost part of the plasma display panel The compressive stress that occurs along the distribution is dispersed to minimize the bumps and lifting of the bulkhead. In addition, as described above, the reduction of the bumps and the lifting phenomenon is the rise and lifting of the non-display partition wall at the outer portion of the plasma display panel as the main cause of noise of the plasma display panel. Noise can be reduced.

A first modified example of the present invention will now be described with reference to FIG. 7. In the plasma display panel 400 of the present invention, the discharge cells 426 have a matrix shape, but the discharge cells 426 may have a stripe shape. As shown in FIG. 7, when the discharge cells are formed in a stripe form, the partition wall 430 is easier to form than when the discharge cells are in the form of a matrix. Meanwhile, when the discharge cells have a stripe shape as shown in FIG. 7, since the compressive stress acts toward the center of the plasma display panel along the partition wall extended by the contraction during the firing process of the partition wall 430, the bumps of the partition wall are raised. The wa phenomena are mainly generated at both ends of the direction in which the partition wall 430 extends, and thus noise is mainly generated in the non-display partitions 430 b located at both ends in the direction in which the partition wall extends. With this in mind, the non-display discharge cells 426b at both ends of which the partition wall extends have an arc shape having a predetermined curvature, and among the plurality of unit non-display discharge cells that are adjacent and extend in the width direction. If the widths Wa3 and Wa4 of the at least one pair of unit discharge cells are formed to be different from each other, vibrations transmitted between the non-display discharge cells may be reduced to reduce noise.

8 to 9, a second variation of the present invention will be described based on the matters different from the present invention. In the plasma display panel 500 according to the second modified example of the present invention illustrated in FIG. The front discharge electrode 513 and the rear discharge electrode 512, which are part of the discharge electrode arranged to surround the discharge cell, are disposed inside the. At least a portion of the partition wall, more specifically, at least a portion of the front discharge electrode and the rear discharge electrode covering the surface facing the inside of the discharge cell is formed of a dielectric material. Depending on the process, the entire partition wall may be formed of a dielectric. On the other hand, the address electrode 322 extends in a direction crossing the direction in which the front discharge electrode and the rear discharge electrode extend for address discharge to select a discharge cell. The address electrode is preferably covered by the dielectric layer 323, and a phosphor layer (not shown) is disposed in a space defined by at least a portion of the front surface and the partition wall of the dielectric layer 323. The discharge cell 526 is filled with any one or two or more of a mixed gas of neon, helium, or argon (Ar), including 10% xenon (Xe) gas. The panel 510 and the rear panel 520 are edge-sealed and coupled by a coupling member such as frit. On the other hand, the ratio of the width of the non-display discharge cells 526b is the same as that of the plasma display panel of the present invention.

On the other hand, in the second modification of the present invention, the light transmittance is remarkably improved since the pair of sustain electrodes do not need to be disposed on the rear surface of the front substrate, and the discharge is discharged because the front discharge electrode and the rear discharge electrode are arranged to surround the discharge cell. The discharge efficiency is improved by generating three-dimensionally from the side of the cell and concentrating to the center.

9, the electrode arrangement | positioning of 2nd modified example of this invention is demonstrated. The front discharge electrode 513 and the rear discharge electrode 512 surround the discharge cell, extend in parallel in one direction, more specifically in the y direction, and cross the direction in which the front discharge electrode and the rear discharge electrode extend. And the discharge cells 526 in the x direction. On the other hand, when the front discharge electrode extends in the y direction, the address electrode 322 is disposed to extend in the x direction, which is a direction intersecting the y discharge direction in which the front discharge electrode extends. Since the address discharge may be performed to select a discharge cell by controlling the potentials applied to the front discharge electrode and the rear discharge electrode without the address electrode, the existence of the address electrode is not essential. On the other hand, the sidewalls of the barrier ribs formed of a dielectric and a protective film 516 for protecting the front discharge electrode and the rear discharge electrode disposed therein is preferably disposed, the protective film is a secondary electron emission coefficient, such as MgO If is formed of a large material to discharge the secondary electrons during discharge serves to facilitate the discharge.

Meanwhile, in the plasma display panel 500 of FIG. 8, which shows a second modified example of the present invention, the partition wall is provided in the rear panel 520, a part of the partition wall is separated by separating the partition wall in a manufacturing process. The partition wall may be formed in the front panel 510 and may be formed by providing another part in the rear panel. The partition wall may be formed in various ways in the manufacturing process.

Meanwhile, as a modification of the present invention, the present invention can be applied to plasma display panels having various structures according to electrode arrangements and the like. However, the features of the present invention are not limited to the above-described plasma display panel or the like.

The present invention confirms that noise is concentrated on the outer portion of the plasma display panel in which the non-display partition wall is disposed. Therefore, the noise is adjacent to each other in the width direction so that vibrations transmitted to each other between the non-display discharge cells are minimized. The noise generated in the non-display discharge cells is minimized by varying the widths of at least one pair or more of the non-display barriers among the non-display discharge cells.

In addition, the shape of the non-display discharge cell is formed in the shape of an arc having a predetermined curvature to prevent the bumps and lifting of the partition caused by the stress generated by the shrinkage during the firing of the partition, thereby minimizing the bumps and the lifting of the non-display partition. As a result, the noise generated in the non-display discharge cell is reduced.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a perspective view of a plasma display panel showing a noise generating area of a plasma display panel;

2 is a cross-sectional view for explaining the shrinkage of the partition wall material during the firing process for forming the partition wall,

FIG. 3 is a partial perspective view illustrating the ridges and lifting phenomena of the non-display partition walls according to shrinkage after formation of the partition walls;

4 is a partially cutaway perspective view of the plasma display panel of the present invention;

5 is a cross-sectional view taken along the line V-V of the present invention for explaining the relationship between the width of the discharge cell of the present invention and the generation of noise,

6 is a cross-sectional view for explaining the generation of stress due to shrinkage during the firing process for forming the partition wall in the plasma display panel of the present invention;

7 is a partially cutaway perspective view of the plasma display panel of the first modification of the present invention;

8 is a partially cutaway perspective view of a plasma display panel of a second modification of the present invention;

9 is a perspective view illustrating front discharge electrodes, rear discharge electrodes, address electrodes, and discharge cells of the plasma display panel according to a second modified example of the present invention;

<Description of Symbols for Major Parts of Drawings>

300. 400, 500: Plasma display panel.

330a: display partition 330b: non-display partition

330: bulkhead

Claims (8)

Spaced apart from each other and disposed to face each other, the front and rear substrates of which edges are sealed; A display partition wall disposed between the front substrate and the rear substrate, the display partition wall defining display discharge cells displaying an image by generating visible light through plasma discharge, and the non-display partition wall defining non-display discharge cells not displaying an image. septum; Discharge electrodes disposed on at least one of the rear side of the front substrate, the front side of the rear substrate, and the interior of the partition wall; And A phosphor layer disposed inside the discharge cell; And Each of the non-display discharge cells each of the unit non-display discharge cells share at least a portion of the partition wall with the display discharge cells, the width of the unit discharge cell in the direction in which the shared partition wall extends, the And at least one pair of unit discharge cells of a plurality of unit non-display discharge cells that are adjacent and extend in the width direction. The method of claim 1, And non-display discharge cells adjacent to the display discharge cells are located at the outermost portion of the plasma display panel. The method of claim 1, Each of the non-display discharge cells each of the unit non-display discharge cells share at least a portion of the partition wall with the display discharge cells, the width of the unit discharge cell in the direction in which the shared partition wall extends, the Plasma display panel, characterized in that the width of at least three or more unit discharge cells of the unit non-display discharge cells adjacent and extending in the width direction of the plurality of unit non-display discharge cells are different from each other The method of claim 1, And a width of the unit non-display discharge cell is greater than a width of the unit display discharge cell. The method of claim 1, And a cross section of the non-display discharge cells has a shape of an arc having a predetermined curvature. The method of claim 1, The discharge electrodes intersect the sustain electrode pairs disposed across the discharge cell at the rear of the front substrate, intersect the sustain electrode pairs in the discharge cell, and between the rear substrate and the sustain electrode pairs. And a front dielectric layer covering the sustain electrode pairs, and a rear dielectric layer covering the address electrodes. The method of claim 1, The discharge electrodes are disposed in the barrier ribs and extend in one direction, and the discharge electrodes are spaced apart from the front discharge electrodes in the barrier ribs and extend in parallel with a direction in which the front discharge electrodes extend. And an address electrode disposed in front of the rear substrate and extending to intersect the front discharge electrodes and the rear discharge electrodes, and a dielectric layer covering the address electrodes. The method of claim 1, The discharge electrodes may be disposed in the barrier ribs to extend in one direction, and the discharge electrodes may be spaced apart from the front discharge electrodes in the barrier ribs and disposed to cross the direction in which the front discharge electrodes extend. Plasma display panel characterized in that it comprises.