KR20050101904A - Plasma display panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel having a new discharge cell structure, which effectively reflects visible light generated from a phosphor layer to the front of the plasma display panel to improve brightness, simplify the process, reduce manufacturing cost, It is an object of the present invention to provide a plasma display panel that has significantly improved light transmittance.

In order to achieve the above object, the present invention is disposed in parallel with the transparent front substrate and the front substrate, disposed between the back substrate and the front substrate and the back substrate formed with recesses, the front substrate and back substrate And defining discharge cells, the front discharge electrodes disposed in the partition wall and the discharge cells disposed in the partition wall to surround the discharge cells and the discharge cells, and spaced apart from the front discharge electrode. A plasma display panel is provided having a discharge electrode, a phosphor layer disposed in a space defined by the concave portion inside the discharge cell, and a discharge gas in the discharge cell.

Description

Plasma display panel {Plasma display panel}

The present invention relates to a high efficiency plasma display panel.

1 illustrates a specific structure of a front panel 110 and a rear panel 120 of a conventional AC three-electrode surface discharge plasma display panel 100. The front panel 110 includes the front electrode 111, the sustain electrode pairs 114 including the Y electrode 112 and the X electrode 113 formed on the rear surface 111a of the front substrate, and the sustain electrode pairs. A front dielectric layer 115 is provided and a protective film 116 covers the front dielectric layer. Each of the Y electrode 112 and the X electrode 113 includes transparent electrodes 112b and 113b formed of ITO and the like and bus electrodes 112a and 113a made of a metal having high conductivity. The bus electrodes 112a and 113a are connected to a connection cable (not shown) disposed on the left and right sides of the plasma display panel 100.

The rear panel 120 includes a rear substrate 121, address electrodes 122 formed on the front surface 121a of the rear substrate 121 to cross the sustain electrode pair 114, and a rear dielectric layer covering the address electrodes. 123, a partition wall 124 formed in the rear dielectric layer 123 and partitioning the discharge cell 126, and a phosphor layer 125 disposed in the discharge cell. The address electrodes 122 are connected to connection cables (not shown) disposed above and below the plasma display panel.

In the case of the plasma display device as described above, the front dielectric layer 115 and the passivation layer 116 are formed on the back surface 111a of the front substrate through which visible light passes, as well as the sustain electrode pair 114. The transmittance of visible light generated in the phosphor layer 125 inside the cells 126 is remarkably decreased, thereby reducing the luminance.

In addition, in the conventional plasma display panel 100, since the sustain electrode pair 114 causing discharge is disposed on the rear surface 111a of the front substrate, the discharge layer 126 may be formed in the phosphor layer 125 inside the discharge cells 126. Most of the sustain electrode pairs 114 (except for the bus electrodes 112b and 113b) are formed of ITO electrodes having high resistance to allow visible light to pass therethrough, thereby increasing driving voltages and increasing the driving voltage due to the voltage drop occurring at the ITO electrodes. When the display panel is applied to a large-area panel, a problem arises that the screen becomes uneven.

In addition, in the conventional plasma display panel 100, an electrode which causes discharge is formed on the rear surface 111a of the front substrate through which visible light passes, so that the discharge is behind the protective film 116 in the discharge cell 126. Is generated and diffused in the light emitting device, the light emitting efficiency is lowered, and when the conventional plasma display panel 100 is used for a long time, charged particles of the discharge gas cause ion sputtering to the phosphor by an electric field. There is a problem that causes permanent afterimage.

FIG. 2 is a cross-sectional view of the discharge cell 126 of the conventional AC three-electrode surface discharge plasma display panel 100 taken along the line II-II of FIG. 1. When a predetermined sustain discharge occurs due to the accumulation of the wall pulses formed by the sustain pulse voltage and the address discharge applied to the sustain electrode pair 114 in the discharge cell 126, a predetermined ultraviolet light (UV) is caused by the discharge. This occurs, and the ultraviolet rays excite the phosphor layer 125. When the energy level of the phosphor of the excited phosphor layer falls from the high level energy level to the low level energy level, it emits a predetermined visible light (V). A portion of the visible light generated in the phosphor layer is directly passed through the front substrate to the front of the plasma display panel. However, the other part of the visible light (Vd) is not reflected on the partition 124, the rear dielectric layer, the back substrate, or the like, or is absorbed to prevent it from going forward. As a result, such a phenomenon lowers the luminance of the plasma display panel and causes a problem of increasing driving power to obtain a predetermined luminance.

The present invention solves the above problems, effectively reflect the visible light generated from the phosphor layer to the front to improve the brightness, to simplify the manufacturing process of the plasma display panel, to save the manufacturing cost, and to dramatically reduce the luminous efficiency and light transmittance An object of the present invention is to provide a plasma display panel having a discharge cell having a new structure, which has been improved.

In order to achieve the above object, the present invention is disposed in parallel with the transparent front substrate and the front substrate, disposed between the back substrate and the front substrate and the back substrate formed with recesses, the front substrate and back substrate and And defining discharge cells together and surrounding the discharge cells with a barrier rib formed of a dielectric, and rear discharge electrodes disposed in the barrier rib to surround the discharge cells and spaced apart from the discharge electrode. A plasma display panel is provided having a phosphor layer disposed in a space defined by electrodes and the concave portion inside the discharge cell, and a discharge gas in the discharge cell.

Meanwhile, the front discharge electrodes may extend in one direction, and the rear discharge electrodes may extend to cross the front discharge electrode in the discharge cell, and each of the front discharge electrodes and the rear discharge electrodes may have a ladder shape. Do. In addition, it is preferable that a reflective layer is disposed between the concave portion and the phosphor layer, and the side surface of the partition wall is preferably covered by a protective film.

Meanwhile, the front discharge electrodes and the rear discharge electrodes may extend in one direction, and the concave portions may be formed in a stripe shape so as to cross the front discharge electrode and the rear discharge electrode on the back substrate, and the concave portion and the phosphor Address electrodes extending from the discharge cell to intersect the front discharge electrode and the rear discharge electrode may be disposed between the layers, and a dielectric layer may be disposed to cover the address electrode between the recess and the phosphor layer. Meanwhile, a partition partition wall may be disposed on the recess to define the discharge cell together with the front substrate, the partition wall, and the back substrate.

In addition, the dielectric layer is preferably provided with a reflective material.

Next, a first embodiment of the present invention will be described with reference to FIGS. 3 to 6. The plasma display panel 200 according to the first embodiment illustrated in FIG. 3 includes a front panel 210 and a rear panel 220, and the front panel includes a transparent front substrate 211 and the rear panel. 220 is disposed to face the front substrate in parallel and has a back substrate 221 having recesses 227 formed thereon as can be seen in FIG. 4B. The concave portion 227 will be described later. On the other hand, the front panel 210 is formed on the rear of the front substrate, more specifically the rear surface 211b of the front substrate to define the discharge cells 226 together with the front substrate 211 and the back substrate 221. And the front discharge electrode 213 and the rear discharge electrode 212 disposed in the partition wall 215 so as to surround the discharge cell 226 and the discharge cell 226. And a protective film 216 covering the side surface 215g of the partition wall, which may be formed as necessary.

As illustrated in FIG. 4B, the rear panel 220 is disposed on the front surface 227a of the concave portion on the rear substrate and extends to intersect the front discharge electrode 213 and the rear discharge electrode 212. 222, a partition partition 224 formed on a front surface 227a of the recess and a partial surface on the address electrode to define a discharge cell 226 together with the front substrate and the rear substrate, the partition within the recess And a phosphor layer 225 disposed in a space defined by the dielectric layer 223 covering the address electrodes, the concave portion 227 and the partition partition wall 224.

Preferably, the dielectric layer 223 includes a reflective material, and the reflective material includes, for example, glass fine particles mainly containing PbO, SiO 2, and B 2 O 3, and a glass paste added with a predetermined additive to improve water resistance and acid resistance. It may be formed of a white dielectric, and may be formed of a glass paste including LiO 2 -Al 2 O 3 -SiO 2 -based glass particles and a nucleating agent such as TiO 2 and ZrO 2. When the dielectric layer 223 includes a reflective material, the luminance of the plasma display panel may be improved by reflecting the visible light generated from the phosphor layer to the front. The reflection of the visible light will be described in detail later.

The front panel 210 and the rear panel 220 are joined and sealed by a coupling member such as a frit (not shown), and neon containing 10% of xenon (Xe) gas inside and after the discharge cell. Discharge gas consisting of any one of (Ne), helium (He), or argon (Ar) or a mixed gas of two or more thereof is filled.

The front substrate 211 and the rear substrate 221 are generally formed of glass, and the front substrate is preferably formed of a material having high light transmittance. A portion of the rear surface 211b of the front substrate defining the discharge cell 226 includes a sustain electrode pair 114 existing on the rear surface of the front substrate of the prior art, a front dielectric layer 115 covering the sustain electrode pair, and the There is no protective film 116 covering the front dielectric layer. As a result, unlike the conventional AC three-electrode surface discharge plasma display panel, when only the plasma display panel 200 is limited, that is, when a filter disposed in front of the plasma display panel is not considered, the discharge cell ( Visible light generated from the phosphor layer 225 of 226 transmits only the transparent front substrate 211 having high light transmittance, thereby significantly increasing the front transmittance.

The front discharge electrode 213 and the rear discharge electrode 212 consider light transmittance in contrast to using a relatively high resistance ITO electrode to increase the light transmittance in a conventional AC type three-electrode surface discharge plasma display panel. The material of the electrode can be selected without any change, and Ag, Cu, Cr, or the like having high electrical conductivity is preferably used.

A partition wall 215 is formed on the rear surface of the front substrate 211 to define discharge cells together with the front substrate and the rear substrate. In FIG. 3, the partition wall 215 partitions the discharge cells 226 into a matrix, but is not limited thereto. The partition wall 215 may be partitioned into various shapes such as a honeycomb form and a delta form. In addition, although the cross section of the discharge cell is shown as a quadrangular shape in FIG. 3, the present invention is not limited thereto and may be a polygon such as a triangle or a pentagon, or a circle or an ellipse.

The front discharge electrode 213 and the rear discharge electrode 212 surrounding the discharge cell 226 are disposed in the partition 215. In order to arrange the front discharge electrode 213 and the rear discharge electrode 212 in the partition 215, for example, referring to the enlarged view of FIG. 3, as illustrated, the rear surface 211b of the front substrate is illustrated. A first barrier layer 215a is formed on the front discharge electrode 213 on the first barrier layer 215a. Thereafter, a second partition layer 215b is formed on the front discharge electrode 213 to cover the front discharge electrode 213. Thereafter, a rear discharge electrode 212 is formed on the second barrier layer 215b, and a third barrier layer 215c is formed on the rear discharge electrode 212 so that the rear discharge electrode 212 is covered. do. On the other hand, the central portion, the front portion, and the rear portion may be provided with two or more layers as necessary (for example, to thicken the thickness of each layer). The barrier rib may be formed of a dielectric material, for example, PbO, SiO 2, or the like. The dielectric material prevents the front discharge electrode and the rear discharge electrode from directly conducting electricity, and when a voltage is applied to the front discharge electrode, the rear discharge electrode, or the address electrode, charge is induced in the dielectric and is formed on the rear surface of the passivation layer. It is responsible for accumulating wall charges.

As shown in FIG. 3, at least a part of the side surfaces 215g of the partition wall 215 is preferably covered by the protective film 216, and the protective film is preferably formed of MgO. The protective layer functions to protect the front discharge electrode 213, the rear discharge electrode 212, and the partition wall 215, and to facilitate discharge through smooth emission of secondary electrons. . Referring to the enlarged view of the barrier rib illustrated in FIG. 3, the passivation layer 216 may be formed by a method such as deposition. In the deposition process of the passivation layer 216, the rear surface 215d and the front substrate of the barrier rib are formed. The protective film may also be formed on the rear surface 211b of the. However, the protective film formed on the rear surface 215d of the partition and the rear surface 211b of the front substrate does not seriously affect the plasma display panel of this embodiment. The partition wall 215 supports pressure generated due to a vacuum state (for example, 0.5 atm) of discharge gas charged in the front panel 210 and the rear panel 220, and the plasma display panel is compressed. To prevent them.

 4A to 4E, the manufacturing process of the exemplary rear panel 220 will be briefly described. As shown in FIG. 4A, a rear substrate 221 made of glass or the like is prepared, and the front discharge electrode 213 and the rear are formed on the rear substrate 221 by etching, sand blasting, or photolithography. The concave portion 227 is formed in a stripe shape so as to have a width substantially equal to a width of a portion of the discharge cell 226 that intersects with the discharge electrodes 212 and is defined by the barrier rib and the front substrate. Thereafter, as shown in FIG. 4C, an address electrode is disposed on the front surface 227a of the concave portion to intersect the front discharge electrode and the rear discharge electrode. The address electrode may be formed by, for example, applying a paste containing silver (Ag) onto the entire surface of the recess by screen printing. Subsequently, as shown in FIG. 4D, a part of the front surface 227a of the concave portion may define the discharge cell 226 together with the front substrate 211, the partition wall 215, and the concave portion 227. The partition partition wall 224 is formed to cover a part of the side surface 227b of the recess and a part of the address electrode 222. At this time, since the partition partition wall is formed to limit the discharge cells, the partition wall 215 is not necessarily necessary when the thickness of the partition wall 215 is sufficiently wide so that cross talk between the discharge cells does not occur. Thereafter, as illustrated in FIG. 4E, the dielectric layer 223 is applied to a space defined by the recess 227 and the partition partition wall 224. The dielectric layer preferably includes a reflective material as described above. Thereafter, the phosphor layer 225 is coated on the entire surface of the dielectric layer 223. The phosphor layer 225 may be formed by applying a phosphor paste mixed with a phosphor, a solvent, and a binder of any one of red, green, and blue phosphors to the front surface 223a of the dielectric layer in the recess. It is formed by going through drying and firing processes. Examples of the red light emitting phosphor include Y (V, P) O 4: Eu, and examples of the green light emitting phosphor include ZnSi 4 4: Mn, YBO 3: Tb, and the blue light emitting phosphor include BAM: Eu.

5 shows a front discharge electrode 213, a rear discharge electrode 212, an address electrode 222, and a discharge cell 226 in the first embodiment. In FIG. 2, the front discharge electrode 213 and the rear discharge electrode 212 extend in parallel with each other along the direction of the x axis, and the address electrode 222 along the direction of the y axis intersecting the front discharge electrode and the rear discharge electrode. ) Is extended. On the other hand, since the distance between the rear discharge electrode 212 and the address electrode 222 is short, it is preferable that an address discharge occurs to select a discharge cell to generate a sustain discharge between the rear discharge electrode 212 and the address electrode 222. In this case, the rear discharge electrode 212 may be a common electrode, and the front discharge electrode 213 may be a scan electrode, but is not limited thereto.

Hereinafter, the operation of the plasma display panel 200 according to the first embodiment of the present invention will be briefly described.

When a predetermined address voltage is applied between the address electrode 222 and the rear discharge electrode 212 from an external power source, the discharge cell 226 to emit light is selected, and the barrier rib in which the rear discharge electrode of the selected discharge cell is located is located. Wall charges accumulate on the sides. Thereafter, when a high voltage pulse voltage is applied to the front discharge electrode 213 and a pulse voltage of a relatively low voltage is applied to the rear discharge electrode 212, a potential difference generated between the front discharge electrode and the rear discharge electrode is caused. The wall charge is moved. As the wall charges move, a discharge gas atom in the discharge cell collides with the wall charges to generate a discharge, and the discharge is a portion close to each other between the front discharge electrode and the rear discharge electrode where a relatively strong electric field is formed. More likely to occur. In this case, in the case of the first embodiment of the present invention, the discharge of the conventional AC three-electrode surface discharge plasma display panel 100 is mainly formed on the rear of the front dielectric layer 115, that is, on the back surface 116a of the protective film. In contrast, since the discharge region is increased along the side surface surrounding the discharge cells 226 which are close portions of the front discharge electrode and the rear discharge electrode, the possibility of discharge is greatly increased compared to the prior art. In addition, when the voltage between the front discharge electrode and the rear discharge electrode is maintained for a predetermined time, the electric field formed on the side of the discharge cell 226 is strongly concentrated in the center, the area of discharge is greatly enlarged compared to the prior art to discharge In addition to the increase in the amount of ultraviolet rays generated, since the discharge spreads to the center around the discharge cell 226, ion collision to the phosphor layer 225 is blocked, thereby preventing ion sputtering.

On the other hand, if the voltage difference between the front discharge electrode and the rear discharge electrode is lower than the discharge voltage after the discharge is formed, the discharge is no longer generated, the space charge and the wall charge is formed in the discharge cell 226. At this time, if a voltage lower than the applied voltage is applied by changing the polarity of the pulse voltage between the front discharge electrode and the rear discharge electrode, a discharge starting voltage is reached with the help of wall charges, thereby causing the discharge to occur again. do. When the polarity of the pulse voltage is alternately applied between the front discharge electrode and the rear discharge electrode repeatedly, the discharge is maintained. On the other hand, ultraviolet (UV) generated by the discharge impinges on the phosphor layer 225 and excites the phosphor molecules of the phosphor layer. When the energy of the excited fluorescent substance drops from the high energy level to the low energy level, visible light having a predetermined wavelength is generated in the phosphor to display an image.

Referring to FIG. 6, a description will be given of how visible light generated in the phosphor layer proceeds to the front of the plasma display panel to display an image. When the energy level of the phosphor of the excited phosphor layer drops from a high level to a low level, visible light (V) having a predetermined wavelength is generated in the phosphor layer, and some of the visible light (V) is directly in the phosphor layer. In front of the display panel, the other part of the visible light (V) proceeds to the rear and side of the phosphor layer. At this time, the visible light emitted to the rear and side of the phosphor layer reaches the dielectric layer applied to the front and side surfaces of the recess, and as described above, since the dielectric includes a reflective material, the visible light is reflected from the dielectric layer. Radiates forward. As a result, visible light generated in the phosphor layer can be sent to the front of the plasma display panel displaying the image, resulting in an increase in luminance. On the other hand, even if the dielectric layer does not contain a reflective material, light may reach the concave and cause total reflection to travel forward, and since the rear substrate may be formed of white glass to reflect visible light, the dielectric layer may be a reflective material. It is not necessarily necessary to include.

7 to 10 will be described with respect to the second embodiment of the present invention mainly on the matters different from the first embodiment of the present invention.

Referring to FIG. 7, in the plasma display panel 300 according to the second embodiment of the present invention, the address electrode existing in the first embodiment does not exist, and the front discharge electrode 313 and the rear discharge electrode 312 have the address. Replace the function of the electrode. In this case, since the address electrode is not formed, the dielectric layer covering the address electrode is not essential. In addition, by forming a recess 327 on the back substrate 321, by applying a phosphor 225 to the recess, a process yield on the back substrate to secure a space for applying the phosphor layer It is not necessary to form this low separate partition. Therefore, the process of forming the partition wall on the rear substrate may be omitted, thereby simplifying the process and reducing the defective rate. In addition, since the address electrode is not formed, the recess formed in the back substrate 321 may also have a different shape.

A manufacturing process of the rear panel of the plasma display panel 300 including the formation of recesses on the rear substrate will be briefly described with reference to FIGS. 8A to 8D. First, as shown in FIG. 8A, a back substrate 321 made of glass or the like is prepared. As shown in FIG. 8B, the discharge cells partitioned by the barrier ribs on the front substrate may be formed on the front surface 321a of the back substrate, for example, by etching, sandblasting, or photolithography. The recessed portion 327 is formed in the same shape as the matrix shape. Subsequently, as shown in FIG. 8C, a reflective layer 323 is formed on the recess by screen printing or the like. The reflective layer may be formed of, for example, glass fine particles mainly containing PbO, SiO 2, and B 2 O 3, and water resistance and acid resistance. It may be formed of a glass paste to which a predetermined additive is added, for example, and may be formed of a glass paste including LiO 2 -Al 2 O 3 -SiO 2 -based glass particles and a nucleating agent such as TiO 2 and ZrO 2. Subsequently, as shown in FIG. 8D, a phosphor layer is coated on the upper surface of the reflective layer 323. The phosphor layer may be formed of a material as described in the first embodiment of the present invention.

On the other hand, the arrangement of the front discharge electrode and the rear discharge electrode can be seen in Figure 8, the address electrode is not formed, the front discharge electrode 313 extending along the x-axis and the y-axis extending along the front A rear discharge electrode 312 disposed to intersect with the discharge electrode 313 is disposed to surround the discharge cell.

On the other hand, the operation of the plasma display panel, which is the second embodiment of the present invention when the address electrode is not formed, will be described focusing on the differences from the first embodiment. Unlike the first embodiment of the present invention, in the second embodiment, the front discharge electrode and the rear discharge electrode are arranged to intersect the discharge cells to be discharged, that is, the discharge cells to be selected in the first embodiment. A predetermined voltage is applied to the capacitor to generate a predetermined wall charge on the side surface of the discharge cell as described above. Subsequently, as described above in the first embodiment, a predetermined voltage is alternately applied between the front discharge electrode and the rear discharge electrode so that sustain discharge occurs with the help of the wall charge, and this process is the discharge cell of the plasma display panel. Specific to the field 326 and iteratively occurs, a predetermined image is implemented.

10, visible light generated in the phosphor layer 225 proceeds to the front of the plasma display panel 300 due to the reflective layer 323 disposed in the recess 327 formed on the rear substrate. This will be described. Some of the visible light (V) generated in the phosphor layer proceeds directly to the front of the plasma display panel, while another part of the visible light proceeds to the rear of the phosphor layer. The visible light propagated to the rear of the phosphor layer proceeds to the concave portion 327, and is reflected by a reflective layer applied to the front and side surfaces of the concave portion to travel forward of the plasma display panel. As a result, the concave portion and the reflective layer applied to the concave portion allow visible light generated in the phosphor layer to travel forward, thereby increasing the luminance of the plasma display panel as a whole. On the other hand, even if the reflective layer is not present, since the visible light generated in the phosphor layer can be reflected forward due to total reflection occurring in the back substrate, the reflective layer is not essential to achieve the present reflective function.

Unlike the conventional plasma display panel, the present invention does not adopt a structure in which the sustain electrode pair is formed on the front panel of the plasma display panel, and adopts a structure in which the discharge electrodes are arranged in the partition wall to surround the discharge cell. Therefore, the dielectric, protective film, or the like need not be disposed on the front panel of the plasma display panel through which visible light is transmitted. As a result, in the plasma display panel of the present invention, visible light generated in the phosphor layer disposed in the discharge cell can directly pass through the front substrate, and the light transmittance is remarkably improved.

In addition, in the conventional plasma display panel, a pair of sustain electrodes generating a discharge is disposed on the back surface of the front substrate, and resistance of most of the pair of sustain electrodes (except for bus electrodes) is passed to pass visible light generated in the phosphor layer in the discharge cell. The driving voltage increases due to the formation of the high ITO electrode and the screen becomes uneven in the large area panel due to the voltage drop occurring in the ITO electrode. However, the present invention is because the discharge electrode is disposed in the partition wall. The front discharge electrode and the rear discharge electrode may be formed of a material having high electrical conductivity, thereby solving the above-described problems.

In addition, in the conventional plasma display panel, a sustain electrode which causes discharge is formed on the rear surface of the front substrate, and the discharge is generated and diffused behind the protective film in the discharge cell, so that the luminous efficiency is lowered. In the case of use, the charged particles of the discharge gas causes ion sputtering on the phosphor by an electric field, causing permanent afterimage, but in the present invention, the discharge occurs in the entire area surrounding the discharge cell, causing discharge to occur in the center part. Since the above problem can be solved.

In addition, since the present invention forms a recess on the rear surface of the rear substrate to arrange an address electrode, a dielectric layer, and a phosphor layer on the recess, a separate partition wall for disposing the dielectric layer and the phosphor layer on the rear substrate is not required. Since the concave portion is simplified, most of the visible light generated in the phosphor layer can be reflected to the front, thereby improving the luminance of the plasma display panel. In addition, a dielectric layer or a reflective layer including a reflective material may be applied to the recess to increase the reflection effect of the visible light.

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 partial cutaway perspective view illustrating a conventional plasma display panel;

2 is a cross-sectional view taken along the line II-II of FIG. 1,

3 is a partial cutaway perspective view of the plasma display panel according to the first embodiment of the present invention;

4A to 4E are cross-sectional views illustrating a manufacturing process of a rear panel of a first embodiment of the present invention;

5 is an exploded perspective view showing only a discharge cell, a front discharge electrode, a rear discharge electrode, and an address electrode according to the first embodiment of the present invention;

6 is a cross-sectional view taken along line VI-VI of a first embodiment of the present invention,

7 is a partially cutaway perspective view illustrating a plasma display panel according to a second embodiment of the present invention;

8A to 8D are cross-sectional views illustrating a manufacturing process of a rear panel of a second embodiment of the present invention;

9 is an exploded perspective view showing only the discharge cell, the front discharge electrode, and the rear discharge electrode of the second embodiment of the present invention;

10 is a cross-sectional view taken along the line VII-VII of FIG. 7.

<Description of Symbols for Major Parts of Drawings>

100, 200, 300: plasma display panel

110, 210, 310: front panel

120, 220, 320: rear panel

215: front partition 226, 326: discharge cell

213 and 313: front discharge electrodes 212 and 312: rear discharge electrodes

227, 327: recess

Claims (5)

Transparent front substrate; A rear substrate disposed in parallel with the front substrate and having recesses formed therein; A partition wall disposed between the front substrate and the rear substrate and defining discharge cells together with the front substrate and the rear substrate and formed of a dielectric; Front discharge electrodes disposed in the partition wall to surround the discharge cells; Rear discharge electrodes disposed in the partition wall to surround the discharge cells and spaced apart from the front discharge electrode; A phosphor layer disposed in a space defined by the concave portion inside the discharge cell; And A discharge gas in the discharge cell; Plasma display panel having; The method of claim 1, wherein the front discharge electrodes extend in one direction, the rear discharge electrodes extend to cross the front discharge electrode in the discharge cell, and each of the front discharge electrodes and the rear discharge electrodes has a ladder shape. And a reflective layer disposed between the concave portion and the phosphor layer, and a side surface of the partition wall is covered by a protective film. The method of claim 1, wherein the front discharge electrodes and the rear discharge electrodes extend in one direction, The recesses are formed in a stripe shape on the rear substrate to intersect the front discharge electrode and the rear discharge electrode, and intersect the front discharge electrode and the rear discharge electrode in the discharge cell between the recess and the phosphor layer. The extended address electrodes are disposed, and a dielectric layer is disposed between the recess and the phosphor layer to cover the address electrode. 4. The plasma display panel of claim 3, further comprising a partition partition wall disposed on the recess to define the discharge cell together with the front substrate, the partition wall, and the back substrate. 4. The plasma display panel of claim 3, wherein the dielectric layer comprises a reflective material.