KR100683771B1 - Plasma display panel - Google Patents

Abstract

An object of the present invention is to provide a plasma display panel in which the luminance is improved and manufacturing costs are reduced while realizing an image close to a natural color. To achieve this object, the present invention is directed to a transparent front substrate and the front substrate. A rear substrate arranged to be; Barrier ribs disposed between the front substrate and the rear substrate to define discharge cells which are spaces for generating discharges; A partition wall dividing the discharge cells into at least two negative discharge cells; Electrode pairs having an X electrode and a Y electrode disposed to be supported by the back substrate; Address electrodes supported on the front substrate so as to cross the electrode pairs in the discharge cell; A phosphor layer disposed in the discharge cell; And a discharge gas present in the discharge cell, wherein the X electrode has at least one sub-X electrode disposed to cross each of the sub-discharge cells, and the Y electrode includes each of the sub-discharge cells. Provided is a plasma display panel having at least one secondary Y electrode disposed to traverse.

Description

 Plasma display panel {Plasma display panel}

1 is an exploded perspective view showing a plasma display panel of a first embodiment of the present invention;

2 is a cross-sectional view taken along the line II-II of the plasma display panel of the first embodiment of the present invention;

3 is a schematic diagram showing a plasma display panel of a first embodiment of the present invention for confirming the arrangement of electrodes in the direction of the III-III line;

4 is an exploded perspective view showing the plasma display panel of the second embodiment of the present invention;

Fig. 5 is a schematic diagram showing the plasma display panel of the second embodiment of the present invention for confirming the arrangement of electrodes in the direction of line V-V.

<Description of Symbols for Major Parts of Drawings>

100, 200: plasma display panel

110, 210: front panel 120, 220: rear panel

125a, 225a, 125b, 225b: negative X electrode

124a, 224a, 124b, and 224b: negative Y electrode

126: electrode pair 126, 226: discharge cell

117 and 217: partition wall 112: address electrode

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 in which a luminance is increased and a manufacturing cost is reduced while an image close to a natural color is realized.

BACKGROUND ART A conventional plasma display panel is a display device that implements a predetermined image by exciting phosphors by ultraviolet rays generated by gas discharge, and has been spotlighted as a next-generation thin display device because a large screen can be configured with high resolution.

Conventionally, such plasma display panels are divided into AC type, DC type, and hybrid type according to the structure and driving principle, and AC type and DC type plasma display panel according to the discharge structure. Is divided into a surface discharge type and a counter discharge type, but in recent years, an AC type surface discharge plasma display panel has become popular.

In the AC type surface discharge plasma display panel, since the sustain electrode pairs causing the discharge are disposed on the back side of the front substrate on the optical path through which the visible light travels, the sustain electrode pairs must be formed of a transparent material having high visible light transmittance. Many restrictions apply to the choice of shape and material.

In addition, the conventional AC type surface discharge plasma display panel has a problem in that the driving voltage is increased to achieve the required level of luminance because the luminance is not high.

In addition, the conventional AC type surface discharge plasma display panel has a low luminous efficiency of the blue light emitting phosphor compared to other phosphors, it is difficult to implement a natural color image.

In addition, the conventional AC type surface discharge plasma display panel has a high driving voltage, has a high price of an integrated circuit chip for controlling an electrical signal applied to an electrode, and thus increases the manufacturing cost of the plasma display panel, thereby lowering its price competitiveness.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display panel which solves the above problems and increases the luminance and reduces the manufacturing cost while realizing an image close to a natural color.

In order to achieve the above object, the present invention provides a transparent front substrate and a rear substrate disposed to face the front substrate, and partition walls defining discharge cells which are spaces disposed between the front substrate and the rear substrate to cause discharge. And electrode pairs having a partition wall for dividing the discharge cells into at least two negative discharge cells, an X electrode and a Y electrode disposed to be supported by the rear substrate, and crossing the electrode pairs in the discharge cell. The present invention provides a plasma display panel including address electrodes which are supported and disposed on the front substrate, a phosphor layer disposed in the discharge cell, and a discharge gas present in the discharge cell.

The present invention also provides a transparent front substrate and a rear substrate disposed to face the front substrate, a partition wall disposed between the front substrate and the rear substrate to define discharge cells which are spaces for generating a discharge, and supported on the rear substrate. Electrode pairs including X electrodes and Y electrodes that are arranged in a predetermined manner; address electrodes supported on the front substrate to intersect the electrode pairs in the discharge cells; a phosphor layer disposed in the discharge cells; And a discharge gas existing in the discharge cell, wherein the discharge cells are divided into red light emitting cells, green light emitting cells, and blue light emitting discharge cells according to the color of visible light generated in the phosphor layer. And a partition wall dividing the cell into at least two secondary blue light emitting discharge cells. Provided.

On the other hand, the X electrode provided in the plasma display panel is preferably provided with at least one secondary X electrode disposed to cross each of the negative discharge cells, in this case, the discharge cell of one discharge cell Preferably, the sub-X electrodes across each of them are electrically common to each other.

On the other hand, the Y electrode provided in the plasma display panel preferably comprises at least one secondary Y electrode disposed to cross each of the negative discharge cells, in this case, the discharge cell of one discharge cell Preferably, the secondary Y electrodes across each of them are electrically common to each other.

The X electrode and the Y electrode of the plasma display panel may be disposed to extend in parallel to each other in one direction, and the address electrode may extend to cross the direction in which the electrode pair extends in the discharge cell. Do.

On the other hand, the phosphor layer provided in the plasma display panel is preferably disposed in a space defined by the front substrate and the partition wall.

On the other hand, it is preferable that the address electrode included in the plasma display panel includes a transparent electrode.

On the other hand, it is preferable to further include a rear dielectric layer supported on the rear substrate and disposed to cover the electrode pairs provided in the plasma display panel, and to the front substrate to cover the address electrodes included in the plasma display panel. It is preferable to further include a front dielectric layer that is supported and arranged.

Hereinafter, the plasma display panel 100 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3.

The plasma display panel 100 includes a front panel 110 and a rear panel 120. In this case, the front panel 110 has a transparent front substrate 111 having a thickness of approximately 2.8 mm made of soda glass, etc., and the rear panel 120 is disposed to face the front substrate 111. A substrate 121 is provided.

In this case, the front substrate 111 is preferably formed of a material such as transparent soda glass so as to transmit visible light generated from the phosphor layer 119 to be described later, but the back substrate is visible light generated from the phosphor layer 119. It is not necessarily transparent because it is not located on the optical path (hereinafter, referred to as the optical path image), which is the traveling path. Accordingly, the back substrate 121 may be formed of glass or the like, but may be formed of an opaque material such as metal or plastic.

Meanwhile, the front panel 100 includes a partition wall 115 disposed between the front substrate 111 and the rear substrate 121 and defining discharge cells 116, which are spaces for generating discharge.

In this case, the partition wall 115 may be formed of a glass component including elements such as Pb, B, Si, Al, and O, and the like, and, as necessary, fillers such as ZrO 2, TiO 2, and Al 2 O 3. And pigments such as Cr, Cu, Co, Fe, TiO2, and the like.

On the other hand, the partition wall 115 is applied to the back surface of the front substrate 111 or the back of the front dielectric layer 113 to be described later, the partition wall material composed of the partition material described above, the mask pattern having a predetermined pattern It may be formed by a sandblasting method, which is disposed on the barrier rib paste and forms a predetermined shape by etching the portion of the mask pattern that is not covered by the accelerated abrasive particles.

The partition wall 115 may be formed by a photolithography method including a photosensitive material in the partition paste to implement a predetermined shape in the partition through exposure and development.

On the other hand, the front panel 110 includes a partition wall 117 that divides the discharge cell 116 into at least two secondary discharge cells 116a and 116b. In this case, the sub-discharge cells divided by the partition wall 117 will be referred to as a first sub-discharge cell 116a and a second sub-discharge cell 116b, respectively.

The partition wall 117 may be formed of the same material as the partition wall, and may be easily formed by sandblasting or photolithography as described above.

On the other hand, when the front panel 110 includes the partition wall 117, the surface area where the phosphor layer can be arranged by the surface area of the partition wall 117 is increased, thereby the discharge cell 116 The amount of the phosphor layer 119 to be described later may be increased.

In addition, when the phosphor layer 119 to be described later is disposed in a space defined by the front substrate 111 and the partition wall 117, the phosphor layer 119 is disposed on the optical path. At this time, when the thickness of the phosphor layer 119 becomes too thick, there is a problem that the transmittance of visible light is reduced. However, due to the presence of the partition wall 117 included in the plasma display panel 100 of the present invention, the surface area in which the phosphor layer 117 can be disposed is increased, so that the required amount of the phosphor layer even when the thickness of the phosphor layer is reduced. Can be placed.

Meanwhile, the front panel 110 includes a phosphor layer 119 disposed in the discharge cell 116, more specifically, in a space defined by the front substrate 111 and the partition wall 115. .

Meanwhile, in order to implement a color image on the plasma display panel 100, the red light emitting cells and green light emitting cells are divided into red light emitting cells, green light emitting cells, and blue light emitting cells. Red, green, and blue light emitting phosphor layers may be disposed in each of the discharge cells and the blue light emitting discharge cells.

In this case, the phosphor layer 119 is a discharge paste when the front dielectric layer 113 is 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. It is formed by applying to at least a portion of the back surface 113a of the front dielectric layer and the sidewalls of the partition wall 115, and then drying and baking.

On the other hand, the red light emitting phosphor includes (Y, Gd) BO ₃ : Eu ³⁺ and the like, and the green light emitting phosphor includes Zn ₂ Si0 ₄ : Mn ²⁺ , and the blue light emitting phosphor includes BaMgAl 10 O 17: Eu ²⁺ . .

Meanwhile, the rear panel 120 includes electrode pairs 126 including an X electrode 125 and a Y electrode 124 that are supported and disposed on the back substrate 121. In this case, although the electrode pair 126 is illustrated as being disposed on the front surface 121a of the rear substrate 121, the electrode pair 126 is not necessarily required to reflect visible light on the front surface of the rear substrate 121. A layer that performs a separate function may be disposed, such as a reflective layer or a reflective layer for reflecting ultraviolet rays, and the electrode pairs may be disposed on the front of the layer, and in some cases, the rear surface 121b of the rear substrate. Since the electrode pairs 126 may be disposed in a state of being covered by a specific protective layer, the electrode pairs 126 may be disposed in a position where the electrode pairs 126 are supported by the rear substrate 121. It is enough.

Meanwhile, the electrode pairs 126 may include only the X electrode 125 and the Y electrode 124, but may be included between the X electrode and the Y electrode to increase an interval between the X electrode and the Y electrode, thereby discharging the electrode pair 126. While increasing the amount, a floating electrode (not shown) having no potential applied to the X electrode and the Y electrode in order to allow a sustain discharge generated at a low potential caused by a sustain discharge potential alternately applied between the pair of electrodes is generated. It may be further disposed therebetween, the intermediate electrode (not shown) is applied between the X electrode and the Y electrode is disposed so that the sustain discharge can be generated at a low potential while increasing the distance between the X electrode and the Y electrode You may. Thus, as shown in FIG. 1, the electrode pair 126 is not limited to having only the X electrode 125 and the Y electrode 124.

On the other hand, the X electrode 125 is provided with at least one secondary X electrode (125a, 125b) disposed to cross each of the first secondary discharge cell (116a) and the second secondary discharge cell (116b). desirable. In this case, the sub-X electrode crossing the first sub-discharge cell 116a is referred to as the first sub-X electrode 125a, and the sub-X electrode across the second sub-discharge cell 116b is referred to as the second sub-X electrode. Let's call it (125b).

Meanwhile, the first sub-X electrode 125a and the second sub-X electrode 125b that cross the first sub-discharge cell 116a and the second sub-discharge cell 116b of one discharge cell 116, respectively. It is preferable that they are electrically common to each other. In this case, in order for the first sub-X electrode 125a and the second sub-X electrode 125b to be electrically common to each other, as shown in FIG. 3, the first sub-X electrode 125a and the second sub-X are shown in FIG. 3. An end of the electrode 125b may be connected to the conductor 125c.

On the other hand, the Y electrode 124 is provided with at least one secondary Y electrode (124a, 124b) disposed to cross each of the first secondary discharge cell 116a and the second secondary discharge cell (116b). desirable. In this case, the negative Y electrode crossing the first negative discharge cell 116a is called a first negative Y electrode 124a, and the negative negative Y electrode across the second negative discharge cell 116b is a second negative Y electrode. Let's call it (124b).

Meanwhile, the first sub Y electrode 124a and the second sub Y electrode 124b that cross the first sub discharge cell 116a and the second sub discharge cell 116b of one discharge cell 116, respectively. It is preferable that they are electrically common to each other. In this case, in order for the first sub Y electrode 124a and the second sub Y electrode 124b to be electrically common to each other, as shown in FIG. 3, the first sub Y electrode 124a and the second sub Y Y. An end of the electrode 124b may be connected to the conductor 124c.

Meanwhile, functions of the sub-X electrode and the sub-Y electrode will be described with reference to the driving of the plasma display panel 100 of the first embodiment of the present invention.

On the other hand, since the electrode pair 126 is disposed to be supported on the back substrate 121 as described above, since the electrode pair 126 is not located on the optical path, the choice of the material is wide. Therefore, the electrode pair 126 may be variously formed of a material such as aluminum, copper, and chromium having high electrical conductivity and relatively low price.

In addition, since the electrode pair 126 may have various shapes as well as materials, the electrode pair 126 may be freely deformed according to the characteristics of the discharge. On the other hand, the electrode pair 126 is formed by applying an electrode paste containing the electrode material to the entire surface of the rear substrate through a screen printing method, and then drying and baking, or by including a photosensitive photoresist in the electrode paste The electrode pairs 126 may be formed by, for example, photolithography to form an electrode by etching using equipment.

In addition, the rear panel preferably includes a rear dielectric layer 123 supported and disposed on the rear substrate 121 to cover the electrode pairs 126. In this case, the rear dielectric layer may be disposed by coating a dielectric paste, which may be formed of PbO, SiO ₂ , or the like, having a thickness of about 30 μm on the entire surface of the back substrate, and then baking it.

In this case, even if the rear dielectric layer 123 does not exist, there is no difficulty in inducing a discharge by forming an electric field inside the discharge cell 116 by applying a potential to the electrode pairs 126, but the electrode pair 126. When the charged particles are accelerated by applying a potential to the charged particles, the accelerated charged particles collide directly with the surface of the electrode pair, which may shorten the life of the electrode. Therefore, the rear dielectric layer 123 may be covered to cover the electrode pairs 126. It is preferable to arrange.

In addition, when the rear dielectric layer 123 is disposed, wall charges are accumulated during address discharge, and wall charges can be used in sustain discharge, thereby reducing the magnitude of the potential to be applied during sustain discharge.

On the other hand, the rear dielectric layer 123 is not necessarily located on the optical path, so it is not necessarily transparent. Rather, the rear dielectric layer 123 may be disposed as a white dielectric to increase the ratio of visible light to the front by increasing the reflectance of the visible light.

The rear panel 120 may further include a passivation layer 127 disposed to cover the rear dielectric layer 123. In this case, the passivation layer 127 serves to protect the electrode layer 126 covered by the rear dielectric layer and the rear dielectric layer, and simultaneously discharges secondary electrons upon collision of charged particles due to discharge. It is in charge of the function.

At this time, MgO or the like is generally used as the material of the protective film, but since the protective film is coated on the rear surface 123a of the rear dielectric layer 123, light transmittance is not a problem, and thus, carbon nanotubes (CNT) having excellent electron emission characteristics are MgO or the like having nanoparticles may be used.

Meanwhile, the front panel 110 includes address electrodes 112 supported and disposed on the front substrate 111 to intersect the electrode pairs 114 in the discharge cell 116. In this case, the address electrodes 112 may be formed in a predetermined shape by the screen printing method or the photolithography method used for the arrangement of the electrode pairs 114 and supported on the front substrate. On the other hand, the meaning of being supported on the front substrate can be interpreted as the same meaning that the electrode pair 126 is supported on the back substrate described above.

The front panel 110 may further include a front dielectric layer 115 supported and disposed on the front substrate 111 to cover the address electrode 112. Of course, even if the front dielectric layer 115 is not disposed, there is no problem in driving the plasma display panel of the present invention. However, as described above, charged particles collide directly with the address electrode when the address discharge occurs, thereby damaging the address electrode. In particular, since the address electrode 112 may be damaged by the accelerated abrasive particles or the etching solution in the process of forming the partition wall 115, the front panel 110 protects the address electrode 112. In order to achieve this, the front dielectric layer 115 is preferably provided.

On the other hand, since the address electrode is located on the optical path, it is preferable to have a transparent electrode to increase the transmittance of the visible light. In this case, in order to increase the visible light transmittance of the address electrode, in general, the address electrode is formed by using indium tin oxide (ITO). Since the ITO has a high light transmittance but a high resistance, the potential of the address electrode formed of ITO is high. When applied, the size of the electric field formed inside the discharge cells across the address electrode due to the voltage drop due to the high resistance of the ITO material may vary the address discharge may not occur uniformly, to solve this problem The front panel may further include a bus electrode (not shown), which is formed of a metallic conductive material and electrically connected to the address electrode, of three layers of silver or chromium-copper-chromium.

On the other hand, the discharge cell is filled with a discharge gas consisting of any one of neon (Ne), helium (He), or argon (Ar) including xenon (Xe) gas, or a mixed gas of two or more thereof. In this case, since the pressure of the discharge gas is in a vacuum state (0.5 atm), the pressure according to the vacuum of the discharge gas acts as a force for pressing the front substrate and the back substrate, and this pressure is supported by the partition wall 115. . On the other hand, the front panel and the rear panel is coupled to the edge is sealed by a coupling member such as a frit (flit).

Hereinafter, the driving of the plasma display panel 100 according to the first embodiment of the present invention will be briefly described with reference to FIGS. 2 to 3, and the above-described negative discharge cell, the negative X electrode, and the negative Y electrode will be described. do.

The driving method for driving the plasma display panel according to the present invention may include various driving methods such as ADS driving and ALIS driving, and various factors such as image quality and response speed of the plasma display panel may vary depending on the driving method. Since the features of the present invention are not changed, an example of driving the plasma display panel of the present invention will be described below with reference to ADS driving.

In general, a discharge occurs in each of the discharge cells 116 included in the plasma display panel 100 for displaying an image for realizing an image. As a result, the state of the wall charges or the amount of charged particles are different between the discharge cells. Therefore, in the case where it is desired to control the discharge occurring in the discharge cells in a uniform manner, desired control is made between the discharge cells. It is difficult to hold.

In order to prevent such a difficulty of the discharge control, by applying a high voltage of a predetermined level or more to all of the discharge cells at the same time to generate the discharge in all the discharge cells, by removing the wall charges existing in the discharge cells to equalize, discharge This leads to the same state of the charged particles in the cell, which is called a reset discharge.

In the plasma display panel 100 of the present invention, such a reset discharge is generated when a lamp potential is applied to the Y electrode 124 or the X electrode 125, and a rising lamp is applied at the initial stage of the reset discharge. After the initial discharge occurs, a falling lamp is immediately applied to the Y electrode 124 to erase all the wall charges accumulated in the discharge cells as the erase discharge occurs in the discharge cells to initialize all the discharge cells.

An address discharge occurs after the above-described reset discharge. In general, an address discharge means a discharge for selecting a discharge cell in which an image is to be implemented. At this time, the selection of the discharge to be implemented is specified by one electrode, for example, the Y electrode 124 among the electrode pairs that cross each other, and the address electrode 112 that crosses the Y electrode in the discharge cell to be selected. Then, a discharge is generated by applying a predetermined pulse voltage to the Y electrode and the address electrode, and wall charges are accumulated on the inner surface of the discharge cell.

In this case, the partition wall 117 is formed of a partition material and functions as a dielectric material. Therefore, when a predetermined pulse potential is applied to the address electrode 112 and the Y electrode 124, the partition wall 117 is applied to the partition wall 117. An electric field is formed. At this time, since the dielectric constant of the partition wall 117 is larger than the discharge gas of the discharge cell, the electric field is formed by the potential applied to the Y electrode 124 and the address electrode 112 due to the presence of the partition wall 117. The size of the is larger than that of the conventional plasma display panel, and thus address discharge is more easily formed. Therefore, the presence of the partition wall 117 can cause an address discharge at a low potential, thereby reducing the cost of an integrated circuit chip that controls an electrical signal applied to the address electrode, resulting in a manufacturing cost of the plasma display panel. Can be reduced.

After the above-described address discharge has occurred, a sustain discharge occurs to implement an image. The sustain discharge is an X electrode 125 and a Y electrode 124 for displaying a specific gray scale in a discharge cell selected by the address discharge. ), The potential is alternately applied a predetermined number of times, so that predetermined visible light is emitted from the discharge cells 116 selected by the above-described address discharge, thereby substantially implementing the image on the panel.

At this time, the sustain discharge is applied to the X electrode 125 and the Y electrode 124 disposed in all the discharge cells alternately to form a voltage lower than the discharge start voltage, so that the wall charge only occurs in the discharge cell in which the address discharge has occurred. Because of the accumulation, the potential difference formed between the wall charge and the X electrode and the Y electrode is added to exceed the discharge start voltage, so that the discharge occurs only in the discharge cell in which the address discharge has occurred, thereby generating visible light.

In this case, in the plasma display panel 100 of the present invention, as described above, the X electrode 125 crosses the first sub discharge cell 116a and the second sub discharge cell 116b. The first secondary Y electrode 124a and the second secondary discharge cell 116b having a second secondary X electrode 125b across the second secondary electrode, and the Y electrode 124 intersects the first secondary discharge cell 116a. A second secondary Y electrode 124b is provided.

Due to this electrode structure, unlike a conventional plasma display panel, when a predetermined pulse potential is applied to the X electrode 125 and the Y electrode 124 to cause a sustain discharge, the pulse potential is reduced by the sub-X electrodes and the negative electrode. The discharge is transmitted to each of the Y electrodes, and thus, sustain discharge is generated simultaneously in the first sub discharge cell 116a and the second sub discharge cell 116b.

In this case, the spaced distances between the first sub-X electrode and the first sub-Y electrode, and the second sub-X electrode and the second sub-Y electrode are respectively greater than the spaced distance between the X electrode and the Y electrode of the conventional plasma display panel. Since it is short, it is possible to reduce the magnitude of the voltage for causing the discharge can lower the price of the integrated circuit chip for controlling the electrical signals applied to the X electrode and the Y electrode.

In addition, since the discharge occurs in the first and second secondary discharge cells together, the size of the discharge space can be reduced and the size of the discharge space can be reduced, while reducing the space burden to accelerate the charged particles. Since it does not decrease relatively, the charged particles in the discharge cell space can be effectively utilized, and thus the amount of discharge can be increased. Since the amount of ultraviolet rays generated can be increased by such an increase in the amount of discharge, the luminance can be increased by efficiently utilizing the amount of the phosphor layer 119 increased by the partition wall 117.

On the other hand, it is preferable that each of the secondary Y electrodes 124a and 124b is electrically common to each other as described above, which is an electrical signal applied to the Y electrodes when the secondary Y electrodes are electrically common to each other. Since the negative Y electrodes can be adjusted, the number of switching of the integrated circuit chip can be reduced, thereby reducing the heat generation of the integrated circuit chip, and the number of the integrated circuit chips can be reduced, thereby reducing the manufacturing cost of the plasma display panel. have.

Meanwhile, as described above, when the Y electrodes are used to perform an address discharge, the Y electrodes are preferably electrically separated from each other. In this case, only the secondary Y electrodes of one Y electrode are provided with each other. It is desirable to be common electrically.

Meanwhile, the sub-X electrodes 125a and 125b may also be electrically common to each other like the sub-Y electrodes. In addition, when the secondary X electrodes are only involved in the reset discharge and the sustain discharge, the X electrodes 125 may be electrically separated from each other, and thus, the X electrodes 125 may be electrically common to each other.

Hereinafter, the plasma display panel 200 according to the second embodiment of the present invention will be described with reference to FIGS. 4 to 5 based on differences from the first embodiment of the present invention.

The plasma display panel 200 of the second embodiment of the present invention shown in FIG. 4 includes a front panel 210 and a rear panel 220 in the same manner as the first embodiment of the present invention. At this time, the plasma display panel 200 of the second embodiment of the present invention differs from that of the first embodiment of the present invention in that the partition wall 217 has a blue light emitting discharge in which the blue light emitting phosphor layer 219B is disposed. The blue light emitting discharge cell 216B is disposed in the cell 216B and is divided into at least two secondary blue light emitting discharge cells 216Ba and 216Bb.

In general, since the blue light emitting phosphor used in the blue light emitting phosphor layer has a lower luminous efficiency than the red light emitting phosphor layer 219R and the green light emitting phosphor layer 219G, the blue expression rate is relatively low. Therefore, in order to solve this problem, the partition wall 217 is disposed in the blue light emitting discharge cell 216B, thereby increasing the amount of visible light generated in the blue light emitting discharge cell 216B. The plasma display panel 200 may realize an image close to natural colors.

Meanwhile, as shown in FIG. 5, when the partition wall 217 is disposed in the blue light emitting discharge cell 216B, the X electrode 225 may include a negative X electrode intersecting each of the sub blue light emitting discharge cells. 225a and 225b, and the Y electrode 224 preferably includes secondary Y electrodes 224a and 224b that cross each of the secondary blue light emitting discharge cells. Through the electrode arrangement, the amount of visible light generated in the blue light emitting discharge cell can be further increased to easily overcome the problems caused by the light emission efficiency of the blue light emitting phosphor.

Meanwhile, as shown in FIG. 5, the sub-X electrodes 225a and 225b are connected to each other by the conductor 225c and are electrically common. The sub-Y electrodes 224a and 224b are electrically conductive. It is preferred that they are connected to each other by sieves 224c and are electrically common.

The plasma display panel of the present invention achieves the following technical effects.

First, the luminance of the plasma display panel is improved by increasing the amount of the phosphor layer to increase the amount of visible light.

Secondly, the manufacturing cost of the plasma display panel is reduced by lowering the driving voltage and lowering the cost of the integrated circuit chip that controls the electrical signals applied to the electrodes.

A third aspect of the present invention is to provide a plasma display panel that improves a problem of a blue light emitting phosphor to implement an image close to a natural color.

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.

Claims (11)

A transparent front substrate and a rear substrate disposed to face the front substrate; Barrier ribs disposed between the front substrate and the rear substrate to define discharge cells which are spaces for generating discharges; A partition wall dividing the discharge cells into at least two negative discharge cells; Electrode pairs having an X electrode and a Y electrode disposed to be supported by the back substrate; Address electrodes supported on the front substrate so as to cross the electrode pairs in the discharge cell; A phosphor layer disposed in the discharge cell; And It includes a discharge gas existing in the discharge cell, The X electrode has at least one secondary X electrode disposed to cross each of the negative discharge cells, and the Y electrode has at least one secondary Y electrode disposed to cross each of the negative discharge cells. Plasma display panel characterized in that. A transparent front substrate and a rear substrate disposed to face the front substrate; Barrier ribs disposed between the front substrate and the rear substrate to define discharge cells which are spaces for generating discharges; Electrode pairs having an X electrode and a Y electrode disposed to be supported by the back substrate; Address electrodes supported on the front substrate so as to cross the electrode pairs in the discharge cell; A phosphor layer disposed in the discharge cell; And It includes a discharge gas existing in the discharge cell, The discharge cells are divided into red light emitting cells, green light emitting cells, and blue light emitting discharge cells according to the color of visible light generated in the phosphor layer. Further comprising partition walls, wherein the X electrode has at least one secondary X electrode disposed to cross each of the secondary blue light emitting discharge cells, and the Y electrode defines each of the secondary blue light emitting discharge cells. And at least one secondary Y electrode disposed to traverse the plasma display panel. delete The method according to claim 1 or 2, And the sub-X electrodes crossing each of the non-discharge cells of one discharge cell are electrically common to each other. delete The method according to claim 1 or 2, And the negative Y electrodes crossing each of the negative discharge cells of one discharge cell are electrically common to each other. The method according to claim 1 or 2, And the X electrode and the Y electrode extend in parallel to each other in one direction, and the address electrode extends to cross the direction in which the electrode pair extends in the discharge cell. The method according to claim 1 or 2, And the phosphor layer is disposed in a space defined by the front substrate and the partition wall. The method according to claim 1 or 2, And the address electrode comprises a transparent electrode. The method according to claim 1 or 2, And a rear dielectric layer supported on the rear substrate so as to cover the electrode pairs. The method according to claim 1 or 2, And a front dielectric layer supported on the front substrate to cover the address electrodes.

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