KR100592297B1 - Plasma display panel - Google Patents

Abstract

SUMMARY OF THE INVENTION The present invention aims to provide a plasma display panel having a reduced discharge start voltage and improved luminous efficiency. The present invention provides a front substrate, a back substrate, a discharge electrode, an address electrode, A plasma display panel comprising a first dielectric layer, a second dielectric layer, a partition, and a phosphor layer, the discharge electrode comprising: a bus electrode extending across the discharge cells; A spacer having a base electrode spaced apart from the bus electrode toward the center of the discharge cell and at least one protruding electrode protruding from the base in at least one of the direction of the center of the discharge cell and the direction of the bus electrode; Auxiliary discharge electrode having a connection for connecting the; One side is connected to the bus electrode, the other side provides a plasma display panel comprising a plurality of main discharge electrodes extending in the direction of the separation portion.

Description

Plasma display panel {Plasma display panel}

1 is a plan view illustrating discharge electrode pairs disposed in discharge cells in a conventional plasma display panel.

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

3 is a plan view illustrating discharge electrode pairs disposed in the discharge cells shown in FIG. 2;

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

5 is a plan view illustrating discharge electrode pairs disposed in the discharge cells shown in FIG. 4;

6 is a partially cutaway perspective view of a plasma display panel according to a third embodiment of the present invention;

FIG. 7 is a plan view illustrating discharge electrode pairs disposed in the discharge cells illustrated in FIG. 6.

Explanation of symbols on the main parts of the drawings

100, 200: plasma display panel

111: front substrate 112, 212, 312: discharge electrode pair

115: first dielectric layer 116: protective film

121: back substrate 122: address electrode

125: first dielectric layer 126 phosphor

128, 328: barrier ribs 130, 230, 330: first discharge electrode

140, 240, 340: second discharge electrode

131, 141, 231, 241, 331, 341 bus electrodes

132, 142, 232, 242, 332, 342: auxiliary discharge electrode

133, 143, 233, 243, 333, 343: spacer

134, 144, 234, 244, 334, 344: base electrode

135, 145, 235, 245, 335, 345: protruding electrode

136, 146, 236, 246, 336, 346: connection

137, 147, 237, 247, 337, 347: main discharge electrode

150, 250, 350: Upper plate 160, 360: Lower plate

180, 280, 380: discharge cell

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having a reduced discharge start voltage and improved luminous efficiency.

Recently, a plasma display panel, which is drawing attention as a replacement of a conventional cathode ray tube display device, is discharged after a discharge gas is filled between two substrates on which a plurality of electrodes are formed. The phosphor formed in a predetermined pattern by the ultraviolet rays is excited to obtain a desired image.

FIG. 1 is a layout view of discharge electrodes 31 disposed in discharge cells in a typical plasma display panel. Referring to the drawings, each discharge electrode 31 includes a bus electrode 31b and transparent electrodes 31a connected to the bus electrode 31b. The bus electrode 31b is disposed across the discharge cell 80, and one rectangular transparent electrode 31a is disposed on each of the discharge cells 80 on the bus electrode 31b. One side of the transparent electrode 31a is connected to the bus electrode 31b, and the other side thereof is formed to have a predetermined length in the center direction of the discharge cell 80. The discharge electrodes 31 are symmetrically arranged in pairs for each discharge cell 80.

However, in the plasma display panel having such a structure, when the gap ΔG between the corresponding transparent electrodes 31a is far, the discharge path is increased and the discharge start voltage is increased. On the contrary, when the gap ΔG between the corresponding transparent electrodes 31a is narrow, the discharge start voltage decreases but the discharge current increases. Therefore, there is a problem that the power consumption increases, the luminous efficiency decreases.

 In order to solve the above problems, an object of the present invention is to provide a plasma display panel having a reduced discharge start voltage and improved luminous efficiency.

In order to achieve the above objects and other objects, the present invention

A back substrate; A front substrate spaced apart from the rear substrate; A partition wall disposed between the front substrate and the rear substrate and partitioning the discharge cells together with the front substrate and the rear substrate; A plurality of discharge electrodes formed in pairs for each of the discharge cells; Address electrodes extending across the discharge cells so as to intersect with the discharge electrode pair in each discharge cell; A first dielectric layer covering the address electrodes; A second dielectric layer covering the discharge electrode pairs; A phosphor layer disposed in the discharge cell; And a discharge gas in the discharge cell.

The discharge electrode is:

A bus electrode extending across the discharge cells;

A spacer having a base electrode spaced apart from the bus electrode toward the center of the discharge cell and at least one protruding electrode protruding from the base in at least one of the center direction of the discharge cell and the bus electrode direction; An auxiliary discharge electrode having a spaced portion and a connection portion connecting the bus electrode;

One side is connected to the bus electrode, and the other side includes a plurality of main discharge electrodes extending in the direction of the separation portion provides a plasma display panel.

In this case, at least one of the protrusions is formed between the adjacent discharge electrodes in the direction from the base electrode to the bus electrode, and an end portion corresponding to the protrusion electrode of the main discharge electrode has a shape having a constant gap with the protrusion. desirable.

The main discharge electrodes are preferably disposed substantially perpendicular to the bus electrode.

In addition, the spacer is preferably disposed substantially parallel to the bus electrode.

In this case, it is preferable that the connecting portion and the spacer are integrally formed.

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

2 and 3 illustrate a plasma display panel 100 according to a first embodiment of the present invention. 2 is a partially cutaway perspective view of the plasma display panel 100, and FIG. 3 is a layout view of the discharge cells 180 and the discharge electrode pairs 112 shown in FIG. 2. In this case, the front substrate 111 direction (z direction) is the upper direction and the rear substrate 121 direction (-z direction) is the lower direction for convenience.

As illustrated in FIGS. 2 and 3, the plasma display panel 100 includes a top plate 150 and a bottom plate 160 coupled in parallel therewith. A partition wall 128 is formed between the front substrate 111 provided on the upper plate 150 and the rear substrate 121 provided on the lower plate 160. The plurality of discharge cells 180 are partitioned by the partition wall 128, the front substrate 111, and the rear substrate 121. The partition 128 performs a function of preventing optical crosstalk between the discharge cells 180. In the present embodiment, the partition wall 128 includes horizontal partition portions 128a in the y direction and vertical partition portions 128b intersecting the horizontal partition portions 128a, and the discharge cells 180 form a rectangular cross section. It is formed to have. The distance (a) between the transverse bulkheads (128a) can be designed in various ways, in the case of 42-inch SD class is 1100 ± 50㎛, the distance (b) between the vertical bulkheads (128b) is 365 ± 30 It is preferable that it is micrometer.

However, the shape of the partition wall is not limited thereto, and as long as it is possible to form a plurality of discharge spaces, the partition wall of various patterns, for example, an open partition wall such as a stripe, may be a closed partition wall such as a waffle, a matrix, a delta, and the like. Can be. In addition, the closed partition wall may be formed such that the cross section of the discharge space becomes a polygon such as a triangle, a pentagon, or a circle, an ellipse, or the like, in addition to the quadrangle as in the present embodiment.

Discharge electrode pairs 112 are disposed on the front substrate 111 of the upper plate 150. Since the visible light formed in the discharge cell 180 is transmitted through the front substrate 111, the front substrate 111 is formed of a transparent material mainly made of glass. In addition, the front substrate 111 is generally one having a thickness of several millimeters, but is not limited thereto.

The discharge electrode pair 112 refers to a pair of discharge electrodes 130 and 140 formed on the rear surface of the front substrate 111 to cause sustain discharge. One discharge electrode of the pair of discharge electrodes 112 serves as the first discharge electrode 130 and functions as a common and sustain electrode, and the other discharge electrode functions as a scan and sustain electrode as the second discharge electrode 140.

Each of the first discharge electrode 130 and the second discharge electrode 140 includes bus electrodes 131 and 141, main discharge electrodes 137 and 147, and auxiliary discharge electrodes 132 and 142. Doing. The bus electrodes 131 and 141 extend across the discharge cells 180, are made of a conductive metal material, and have a narrow width. The bus electrodes 131 and 141 may be formed in a single layer structure using a metal such as Ag, Al, or Cu, but may also be formed to have a multilayer structure. Since the bus electrodes 131 and 141 to which an external power source is applied are formed of a conductive material, the voltage drop in the longitudinal direction is small. Thus, power consumption is reduced and response speed is increased.

The main discharge electrodes 137 and 147 and the auxiliary discharge electrodes 132 and 142 electrically connected to the bus electrodes 131 and 141 are conductors capable of causing discharge and are emitted from the phosphor layer 126. It is preferable that the light is formed of a transparent material that does not interfere with the front substrate 111. Such a material includes indium tin oxide (ITO). In the present embodiment, the auxiliary discharge electrodes 132 and 142 include the spacers 133 and 143 and the connection parts 136 and 146.

The spacers 133 and 143 are spaced apart from the bus electrodes 131 and 141 at predetermined intervals in the center direction of the discharge cell 180, and preferably parallel to the bus electrodes 131 and 141. Is placed. Since the short gap G1 is formed between the paired spaced portions 133 and 143 in one discharge cell 180, the spaced portions 133 and 143 function as a discharge igniter in which discharge starts. To perform. In this case, the spaced apart portions 133 and 143 and the connection portions 136 and 146 are preferably formed integrally.

As described above, the spacers 133 and 143 are disposed to be parallel to the bus electrodes 131 and 141, but are not limited thereto and may be disposed in the vertical direction to the bus electrodes 131 and 141. However, since the size of the spacers 133 and 143 is very fine, the length may be uneven in the vertical direction (y direction) due to a process error. In this case, since the length of the short gap G1 also varies, there is a problem that the discharge start does not occur stably. Therefore, as shown in the present embodiment, by disposing the spacers 133 and 143 in parallel with the bus electrodes 131 and 141, the electrode area of the spacers 133 and 143 forming the short gap G1 is increased. And the discharge is stably started. Details thereof will be described later.

The spacers 133 and 143 include base electrodes 134 and 144 and protruding electrodes 135 and 145. The base electrodes 134 and 144 are spaced apart from the bus electrodes 131 and 141 in the center direction of the discharge cell 180. The protruding electrodes 135 and 145 protrude from the base electrodes 134 and 144 toward the center of the discharge cell 180. Therefore, the cross-sectional area of the electrode of the portions in which the protruding electrodes 135, 145 and the base electrodes 134, 144 are formed among the spaced portions 133 and 143 becomes larger than the portion without the protruding electrodes. As the amount of current flowing increases, firing occurs more easily, and consequently, power consumption can be reduced.

In this case, the protruding electrodes 135 and 145 formed on the auxiliary discharge electrodes 132 and 142 adjacent to each other in the discharge cell 180 are formed to form the main discharge electrodes 137 and 147. It is preferably formed on one extension line extending in the direction. That is, in Fig. 3, those formed in the same y-axis direction are preferable. This is because a short gap is formed between the adjacent protruding electrodes even shorter.

The spacers 133 and 143 are electrically connected to the bus electrodes 131 and 141 by the connection parts 136 and 146. One side of each connecting portion 136, 146 is connected to the bus electrodes 131, 141, and the other side thereof is connected to the spacer 133, 143, preferably the bus electrodes 131, 141, and It is disposed perpendicular to the spacers 133 and 143. In addition, the connecting portions 136 and 146 are disposed above the vertical partition portion 128b.

In the discharge cell 180, a plurality of main discharge electrodes 137 and 147 is formed at a portion surrounded by the bus electrodes 131 and 141, the connection parts 136 and 146, and the spacers 133 and 143. Is placed. One side of the main discharge electrodes 137 and 147 is connected to the bus electrodes 131 and 141, and the other side thereof extends by a predetermined length toward the center of the discharge cell 180.

The main discharge electrodes 137 and 147 are spaced apart from each other at predetermined intervals in the x direction and arranged in parallel, and are substantially perpendicular to the bus electrodes 131 and 141. The lengths of the main discharge electrodes 137 and 147 are preferably the same, and are formed to be shorter than the lengths of the connection portions 136 and 146. Accordingly, a long gap G2 is formed between the corresponding main discharge electrodes 137 and 147 in each discharge cell 180.

The width w, the length of each of the main discharge electrodes 137 and 147, and the separation distance G2 between the main discharge electrodes 137 and 147 may be variously designed. The width w of the main discharge electrodes 137 and 147 is preferably 10 μm to 50 μm, and the length is preferably 280 μm to 420 μm.

In addition, the distance k between the main discharge electrodes 137 disposed on the first discharge electrode 130 and adjacent to each other preferably has a gap of at least 10 μm or more. The same is true between the main discharge electrodes 147 provided in the second discharge electrode 140, which is not formed as one of the main discharge electrodes 137 and 237 in one discharge cell 180. This is because the gap with the gap increases the area of contact with the outside, thereby reducing the total amount of current flowing to the main discharge electrodes 137 and 147, resulting in improved consumption efficiency. In addition, the separation distance G2 between the main discharge electrodes 137 and 147 is preferably 50 μm to 90 μm. This is because the efficiency increases as the separation distance G2 increases.

The main discharge electrodes 133 and 143, the auxiliary discharge electrodes 136 and 146, and the bus electrodes 131 and 141 are formed using a photo etching method, a photolithography method, or the like.

The first dielectric layer 115 is formed on the front substrate 111 provided with the discharge electrode pairs 112 to fill the discharge electrode pairs 112. The first dielectric layer 115 may be configured such that adjacent adjacent first discharge electrodes 130 and second discharge electrodes 140 are energized with each other, and positive or negative ions are directly connected to the first discharge electrodes 130 and the second discharge electrodes 140. While preventing from damaging the first discharge electrode 130 and the second discharge electrode 140 by collision, it is formed as a dielectric that can induce charge. Such dielectrics include PbO, B2O3, SiO2 and the like.

The address electrodes 122 are disposed on the rear substrate 121 opposite to the surface on which the discharge electrode pair 112 of the front substrate 111 is disposed. The address electrodes 122 extend across the discharge cells 180 to intersect the first discharge electrode 130 and the second discharge electrode 140 in each discharge cell 180.

The address electrodes 122 are used to generate an address discharge for facilitating sustain discharge between the first discharge electrode 130 and the second discharge electrode 140. More specifically, the address electrodes 122 lower the voltage for sustain discharge. Do it. The address discharge is a discharge occurring between the second discharge electrode 140 and the address electrode 132. When the address discharge is completed, cations are accumulated on the second discharge electrode 140 side and electrons are discharged on the first discharge electrode 130 side. Is accumulated, and thus, the sustain discharge between the first discharge electrode 130 and the second discharge electrode 140 becomes easier.

A space formed by the pair of first discharge electrodes 130 and the second discharge electrodes 140 and the address electrodes 122 intersecting the same is formed as a unit discharge cell 180. .

The second dielectric layer 125 is formed on the back substrate 121 provided with the address electrode 122 to fill the address electrode 122. The second dielectric layer 125 is formed as a dielectric that can induce charge while preventing cations or electrons from colliding with the address electrode 122 during discharge, thereby inducing charge. Such dielectrics include PbO and B2O3. , SiO2 and the like.

In addition, a protective film 116 made of MgO is formed on the bottom of the first dielectric layer 115. The passivation layer 116 prevents cations and electrons from colliding with the first dielectric layer 115 during the discharge to damage the first dielectric layer 115, and has good light transmittance and emits a large amount of secondary electrons during the discharge. In particular, the MgO film 116 is mainly formed into a thin film using sputtering, electron beam deposition, or the like.

Red, green, and blue light emitting phosphor layers 126 are formed on both sides of the partition wall 128 formed on the second dielectric layer 125 and on the entire surface of the second dielectric layer 125 where the partition wall 128 is not formed. The phosphor layer 126 has a component that generates ultraviolet light by receiving ultraviolet rays. The phosphor layer formed on the red light emitting subpixel includes phosphors such as Y (V, P) O4: Eu, and is formed on the green light emitting subpixel. The phosphor layer includes phosphors such as Zn 2 SiO 4: Mn, YBO 3: Tb, and the like, and the phosphor layer formed on the blue light emitting subpixel includes phosphors such as BAM: Eu.

The discharge cell 180 is filled with a discharge gas such as Ne, He, Xe, and the like and a mixed gas thereof.

Referring to the operation of the plasma panel 100 according to the present invention configured as described above are as follows.

The plasma discharge generated in the plasma display panel 100 is largely divided into address discharge and sustain discharge. The address discharge is caused by the application of the address discharge voltage between the address electrode 122 and the second discharge electrode 140, and as a result of the address discharge, the discharge cell 180 to generate the sustain discharge is selected. Thereafter, when a discharge sustain voltage is applied between the first discharge electrode 130 and the second discharge electrode 140 of the selected discharge cell 180, a sustain discharge occurs in the discharge cells 180 selected by the address discharge. do. The discharge sustain voltage is applied to the bus electrodes 131 and 141, and the main discharge electrodes 137 and 147 and the auxiliary discharge electrodes 132 and 142 are supplied with voltages from the bus electrodes 131 and 141. . The short-gap discharge occurs first in the protruding electrodes 135 and 145 more precisely between the corresponding separation portions 133 and 143 among the auxiliary discharge electrodes 132 and 142 that are applied with the voltage. do. This is because the gap G1 between the corresponding spacers 133 and 143 is smaller than the gap G2 between the corresponding main discharge electrodes 137 and 147. Due to the spacers 133 and 143, the plasma display panel 100 according to the present embodiment starts to discharge at a lower voltage than in the conventional plasma display panel.

After the discharge is initiated, the discharge is diffused to cause a long-gap discharge between the corresponding main discharge electrodes 137 and 147. In this case, the discharge efficiency may be improved by increasing the space between the corresponding bus electrodes 131 and 141 to increase the discharge space. In addition, in the present embodiment, since the main discharge electrodes 137 and 147 have a structure spaced apart from each other, the electrode area as a whole becomes smaller than the transparent electrode of the conventional plasma display panel. Therefore, the discharge current is reduced during discharge, reducing the power consumption by about 30%. Although the area of the main discharge electrodes 137 and 147 and the auxiliary discharge electrodes 132 and 142 is small in this embodiment, in the high-pressure discharge cell 180, ions collide with the neutral particles so that the path of the discharge current is y. Since the total amount of plasma discharge is maintained in a similar manner to the conventional one, since the diffusion is made in the direction to produce the excitation species, the loss in luminance is very small. On the contrary, since the decrease in the luminance by the transparent electrode occurs less, the luminance increases in a nearly similar range or about 10%. Since the power consumption is greatly reduced and the brightness is slightly increased, the luminous efficiency is greatly improved. The above-described short gap discharge and long gap discharge are sequentially repeated inside the discharge cell 180. Ultraviolet rays are emitted while the energy level of the discharged gas excited during the sustain discharge is lowered. The ultraviolet rays excite the phosphor 126 coated in the discharge cell 180. As the energy level of the excited phosphor 126 is lowered, visible light is emitted, and the visible light is emitted from the first dielectric layer 115 and the front substrate. The light is transmitted through 111 to form an image that can be recognized by the user.

4 and 5, a second embodiment of the present invention is shown. 4 is a partially cutaway perspective view of the plasma display panel 200 according to the second exemplary embodiment of the present invention, and FIG. 5 is a plan view illustrating discharge electrode pairs disposed in the discharge cells 280 illustrated in FIG. 4. . Here, descriptions will be made mainly on the matters different from the above-described embodiment. Like reference numerals in the drawings shown above indicate the same members.

4 and 5, at least one of the protruding electrodes 245 of the first discharge electrode protruding electrode 235 and the second discharging electrode may be formed from the base electrodes 234 and 244 by the bus electrodes 231 and 241. Is formed in the () direction. In this case, an end portion of the main discharge electrodes 237 and 247 corresponding to the protruding electrodes 235 and 245 preferably has a predetermined gap G3 with the protruding electrodes 235 and 245, thus consuming This is because the efficiency can be improved by reducing the power.

As a result, the thickness of a portion where the protruding electrodes 235 and 245 and the base electrodes 234 and 244 are formed together is easier to fire than a portion where the protruding electrodes 235 and 245 are not formed, and the main discharge electrode is formed. Discharge spreading is rapidly performed at 237 and 247.

The structure of the protruding electrodes 235 and 245 provided in the present invention is not limited to FIGS. 2 to 5, but the protruding electrode and the base electrode formed in the discharge cell 280 in the direction of the discharge cell in one discharge cell 280. Protruding electrodes may be formed together.

In addition, since the driving method of the plasma display panel 200 according to the present embodiment is the same as the above-described embodiment, a description thereof will be omitted.

6 and 7, a third embodiment of the present invention is shown. FIG. 6 is a partially cutaway perspective view of the plasma display panel 300 according to the third embodiment of the present invention, and FIG. 7 is a plan view illustrating discharge electrode pairs disposed in the discharge cells 280 of FIG. 6. . Here, descriptions will be made mainly on the matters different from the above-described embodiment. Like reference numerals in the drawings shown above indicate the same members.

6 and 7, the plasma display panel 300 includes a top plate 350 and a bottom plate 360 that are coupled in parallel with each other. However, the present embodiment is different from the above-described embodiment. The discharge cells 380 and the non-discharge cells 390 are partitioned by the mold partition wall 328. The waffle-shaped partition wall 328 includes horizontal partition walls 328a and vertical partition walls 328b, and the non-discharge cells 390 are disposed between the discharge cells 380 disposed in the y direction by the partition walls 328. Is formed. Since the plasma discharge does not occur in the non-discharge cells 390, the contrast is improved.

As in the above-described embodiment, a discharge electrode pair 312 is disposed in each discharge cell 380. In the discharge electrode pair 312, each of the first discharge electrode 330 and the second discharge electrode 340 is a main discharge electrode 337 and 437, an auxiliary discharge electrode 332, 343 and a bus electrode 331. 341. In the discharge cells 380, bus electrodes 331 and 341 are disposed above the horizontal wall portions 328a to improve the aperture ratio.

The auxiliary discharge electrodes 332 and 343 have spaced apart portions 333 and 343 and connecting portions 336 and 346, and the spaced apart portions 333 and 343 protrude from the base electrodes 334 and 344. Electrodes 335 and 345 are provided.

In this case, the structures and functions of the auxiliary discharge electrodes 332 and 342 and the bus electrodes 331 and 341 are the same as those of the auxiliary discharge electrodes 132 and 142 and the bus electrodes 131 and 141 of the above-described embodiment. Or similar, so it is omitted here. In addition, the structures of the auxiliary discharge electrodes 332 and 342 and the bus electrodes 331 and 341 illustrated in FIGS. 6 and 7 are the same as those shown in FIGS. 2 and 3, but are not limited thereto. The auxiliary discharge electrodes 232 and 242 and the bus electrodes 231 and 241 according to the second embodiment of the present invention shown in FIG. 5 may be formed.

Since the driving method of the plasma display panel 300 according to the present embodiment is the same as the above-described embodiment, a description thereof will be omitted.

In the plasma display panel according to the present invention, the discharge start voltage is reduced by the spaced portion of the transparent electrode, and the luminous efficiency is improved by the main body portions of the transparent electrode.

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 (10)

A back substrate; A front substrate spaced apart from the rear substrate; A partition wall disposed between the front substrate and the rear substrate and partitioning the discharge cells together with the front substrate and the rear substrate; A plurality of discharge electrodes formed in pairs for each of the discharge cells; Address electrodes extending across the discharge cells so as to intersect with the discharge electrode pair in each discharge cell; A first dielectric layer covering the address electrodes; A second dielectric layer covering the discharge electrode pairs; A phosphor layer disposed in the discharge cell; And a discharge gas in the discharge cell. The discharge electrode is: A bus electrode extending across the discharge cells; A spacer having a base electrode spaced apart from the bus electrode toward the center of the discharge cell and at least one protruding electrode protruding from the base in at least one of the center direction of the discharge cell and the bus electrode direction; An auxiliary discharge electrode having a spaced portion and a connection portion connecting the bus electrode; One side is connected to the bus electrode, and the other side has a plurality of main discharge electrodes extending in the direction of the separation portion. The method of claim 1, At least one of the protrusions is formed between discharge electrodes adjacent to each other in the direction from the base electrode to the bus electrode, And an end portion corresponding to the protruding electrode of the main discharge electrode has a shape having a predetermined gap with the protruding portion. The method of claim 1, And the protruding electrode protrudes from the spaced apart portion at a distance of 15 μm or less. The method of claim 1, And the main discharge electrodes are disposed substantially perpendicular to the bus electrode. The method of claim 4, wherein And at least 10 [mu] m or more between the adjacent main discharge electrodes. The method of claim 1, And the separation part is disposed substantially parallel to the bus electrode. The method of claim 1, And the connecting portion and the spaced apart portion are integrally formed. The method of claim 1, And the main discharge electrodes have substantially the same length. The method according to any one of claims 1 to 8, The auxiliary discharge electrode and the main discharge electrode is a plasma display panel, characterized in that the electrode of a transparent material. The method according to any one of claims 1 to 8, The protruding electrodes formed on the auxiliary discharge electrodes adjacent to each other in the one discharge cell and corresponding to each other are formed on one extension line extending in the direction in which the main discharge electrodes are formed.

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