KR20070119906A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to prevent the degradation of an ambient contrast when a fluorescent substrate layer is formed on an exhaust path by adopting a barrier rib structure between discharge cells, applying the fluorescent substance layer through a dispenser method, and coloring a dielectric. A first substrate(10) and a second substrate(20) face to each other and are separately arranged from each other. An address electrode(11) is extended in a first direction on the first substrate. A dielectric(13) covers the address electrode and is formed on the first substrate and colored. A barrier rib(16) is formed on the dielectric to divide discharge cells(17) corresponding to the address electrode and to form an exhaust path(18). Fluorescent substance layers(19) are formed on the discharge cells and the exhaust path. A first electrode(31) and a second electrode(32) are respectively extended to a second direction intersected in the first direction on the second substrate. The first and second electrodes are formed to correspond to the discharge cells.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

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

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

FIG. 3 is a plan view illustrating an arrangement relationship between discharge cells and electrodes in FIG. 1.

4 is a plan view showing a disposition relationship between discharge cells and electrodes in a plasma display panel according to a second embodiment of the present invention.

5 is a cross-sectional view taken along the line VV of FIG. 4.

6 is a plan view showing a disposition relationship between discharge cells and electrodes in a plasma display panel according to a third embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: first substrate (back substrate) 11: address electrode

13, 33, 43: first dielectric layer 13a, 33a, 43a: colored portion

16, 26, 36: partition 16a, 26a, 36a: first partition member

16b, 26b, 36b: second partition member 116, 126, 136: third partition member

216, 226, 236: fourth partition member 326, 336: bridge partition

326a: groove 17: discharge cell

18, 28, 38: exhaust passage 19, 29: phosphor layer

20: second substrate (front substrate) 23: second dielectric layer

24: protective film 31: first electrode (holding electrode)

32: second electrode (scanning electrode) 31a, 32a: transparent electrode

31b, 32b: bus electrode A1: arrow direction

DG: discharge gap W31, W32: width

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 which prevents reduction of bright room contrast when a phosphor is applied to a partition structure having an exhaust passage by a dispenser method.

In general, a plasma display panel is a visible light of red (R), green (G) and blue (B) generated by exciting the phosphor using a vacuum ultra-violet (VUV) emitted from the plasma obtained through gas discharge It is a display device for implementing an image.

As an example, an AC plasma display panel forms address electrodes on a back substrate and covers the address electrodes with a dielectric layer. The partition walls are disposed between the address electrodes on the dielectric layer to form a stripe shape, and phosphor layers of red (R), green (G), and blue (B) layers are formed on the partition walls. On the front substrate facing the rear substrate, display electrodes composed of a pair of sustain electrodes and scanning electrodes are formed along the direction crossing the address electrodes, and a dielectric layer and an MgO protective film cover the display electrodes. The discharge cell is formed at the point where the pair of address electrodes on the rear substrate and the pair of display electrodes on the front substrate cross each other. In the plasma display panel, millions of unit discharge cells are arranged in a matrix form.

The memory characteristic is used to drive the discharge cells of the plasma display panel. In more detail, in order to generate a discharge between the sustain electrode and the scan electrode constituting the pair of display electrodes, a potential difference of more than a specific voltage is required, and the voltage at this boundary is called a firing voltage (Vf). When the scan voltage and the address voltage are respectively applied to the scan electrode and the address electrode, the discharge is started to form a plasma in the discharge cell, and the electrons and ions of the plasma move toward the electrodes having opposite polarities.

On the other hand, a dielectric layer is applied to each electrode of the plasma display panel, so that most of the moved space charges are stacked on the dielectric layer having opposite polarity, so that the net space potential between the scan electrode and the address electrode is originally applied to the address. The voltage becomes lower than the voltage Va, the discharge is weakened, and the address discharge is extinguished. At this time, a relatively small amount of electrons are accumulated in the sustain electrode, and a relatively large amount of ions are accumulated in the scan electrode. The charges accumulated on the sustain electrode and the dielectric layer covering the scan electrode are wall charged (Qw). The space voltage formed between the sustain electrode and the scan electrode by these wall charges is referred to as wall voltage (Vw).

Subsequently, when the discharge sustain voltage Vs is applied to the sustain electrode and the scan electrode, the sum of the magnitudes of the discharge sustain voltage Vs and the wall voltage Vw (Vs + Vw) is the discharge start voltage Vf. If higher, sustain discharge occurs in the discharge cell. The vacuum ultraviolet (VUV) generated at this time excites the phosphor and emits visible light through the transparent front substrate.

However, when there is no address discharge between the scan electrode and the address electrode (that is, when the address voltage Va is not applied), wall charges do not accumulate between the sustain electrode and the scan electrode, and consequently, the sustain electrode and the scan electrode. There is no wall voltage in between. At this time, only the discharge sustain voltage Vs applied to the sustain electrode and the scan electrode is formed in the discharge cell. Since the discharge sustain voltage is lower than the discharge start voltage Vf, the gas space between the sustain electrode and the scan electrode cannot be discharged.

The plasma display panel driven as described above includes a barrier rib structure that forms an exhaust passage in a direction intersecting the longitudinal direction of the address electrode, and a phosphor formed by a dispenser method of applying a phosphor by moving the dispenser in the longitudinal direction of the address electrode. With layers.

Since the dispenser method applies the phosphor without interruption in the longitudinal direction of the address electrode, the phosphor is also applied to the discharge cell and the exhaust passage formed between the discharge cells. The white phosphor layer formed in the exhaust passage between these discharge cells lowers the clear room contrast of the plasma display panel.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display panel which prevents a decrease in bright room contrast even in the presence of a white phosphor layer applied to an exhaust passage by a dispenser method.

According to an embodiment of the present invention, a plasma display panel includes a first substrate and a second substrate disposed to face each other, an address electrode extending in a first direction from the first substrate, and covering the address electrode. A dielectric layer formed on the substrate and colored; a partition wall formed on the dielectric layer to partition discharge cells corresponding to the address electrode and forming an exhaust passage; a phosphor layer formed on the discharge cell and the exhaust passage; and the second layer The substrate may include first and second electrodes extending in a second direction crossing the first direction and formed to correspond to the discharge cells.

The dielectric layer may be colored black or brown. The dielectric layer may include one of chromium (Cr), cobalt (Co), manganese (Mn), ruthenia (Ru), Cu (copper), and antimony (Sb).

The exhaust passage may be formed in the second direction. The dielectric layer may include a colored part colored in a portion facing the exhaust passage.

The partition wall extends in the first direction and extends in the second direction between the first partition wall members formed at the discharge cell intervals along the second direction and between the first partition wall members, and the first direction extends in the first direction. Accordingly, the second barrier rib members may be formed at intervals of the discharge cells.

The second partition member may include a third partition member and a fourth partition member that are separated between the discharge cells continuous in the first direction to form the exhaust passage.

The second partition member may include a bridge partition formed in the first direction between the third partition member and the fourth partition member.

The bridge partition wall may be disposed in the center of the second direction of the discharge cell between the discharge cells neighboring in the first direction.

The phosphor layer formed in the exhaust passage may be formed on the bridge partition wall.

The dielectric layer may include a coloring part colored in correspondence with the bridge partition wall and the phosphor layer.

The bridge partition wall may be disposed at both sides of the second direction of the discharge cell between the discharge cells neighboring in the first direction. The phosphor layer formed in the exhaust passage may be formed between the bridge partition walls.

The dielectric layer may include a coloring unit that is colored between the bridge partition walls and corresponding to the phosphor layer.

The bridge partition wall may include a groove connecting the exhaust passage in the second direction.

Each of the first electrode and the second electrode includes a bus electrode disposed on both sides of the first direction of the discharge cell and extending in the second direction, and a transparent electrode protruding from the bus electrode toward the center of the discharge cell. can do.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

FIG. 1 is a perspective view schematically illustrating an exploded view of a plasma display panel according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1.

Referring to these drawings, the plasma display panel according to the first embodiment is disposed on the first substrate (hereinafter referred to as a "back substrate") 10 and the second substrate disposed to face each other at predetermined intervals. A substrate (hereinafter referred to as a "front substrate") 20 and a partition wall 16 provided between the substrates 10 and 20 are included. The partition wall 16 is formed at a predetermined height between the rear substrate 10 and the front substrate 20 to partition the plurality of discharge cells 17. The discharge cells 17 are filled with a discharge gas (for example, a mixed gas including neon (Ne) and xenon (Xe)) so as to generate vacuum ultraviolet rays by gas discharge. The discharge cells 17 absorb the vacuum ultraviolet rays and display visible light. A phosphor layer 19 emitting light is provided.

The plasma display panel includes an address electrode 11 and a first electrode (hereinafter referred to as a “holding electrode”) corresponding to each discharge cell 17 between the rear substrate 10 and the front substrate 20 in order to realize an image by gas discharge. 31 and a second electrode (hereinafter referred to as "scan electrode") 32 are provided.

As an example, the address electrode 11 is formed along the first direction (y-axis direction in the drawing) on the inner surface of the back substrate 10 to form discharge cells 17 adjacent to the y-axis direction. Corresponds continuously. In addition, the plurality of address electrodes 11 are arranged side by side to correspond to the discharge cells 17 adjacent to each other in a second direction (the x-axis direction in the drawing) that crosses the y-axis direction.

The address electrodes 11 are covered with the first dielectric layer 13 covering the inner surface of the back substrate 10 as described above. The first dielectric layer 13 prevents cations or electrons from directly colliding with the address electrode 11 during discharge, thereby preventing damage to the address electrode 11, and also forms and accumulates wall charges. Since the address electrode 11 is disposed on the rear substrate 10 and does not prevent the visible light from being irradiated forward, the address electrode 11 may be formed as an opaque electrode. That is, the address electrode 11 may be formed of a metal electrode having excellent conductance.

The partition 16 is actually provided on the first dielectric layer 13 to partition the discharge cells 17. The partition 16 includes first partition members 16a extending in the y-axis direction and second partition members 16b extending in the x-axis direction between the first partition members 16a. In addition, the discharge cells 17 are formed in an independent structure.

The phosphor layer 19 formed in each of the discharge cells 17 is coated with a phosphor paste on the side of the partition 16 and the surface of the first dielectric layer 13 positioned between the partitions 16. It is formed by drying and firing.

The phosphor layer 19 is formed of phosphors of the same color in the discharge cells 17 formed along the y-axis direction. In addition, the phosphor layer 19 is repeatedly formed by the phosphors of red (R), green (G), and blue (B) in the discharge cells 17 repeatedly arranged along the x-axis direction.

In addition, the sustain electrode 31 and the scan electrode 32 are provided on the inner surface of the front substrate 20 so that the surface discharge structure corresponds to each discharge cell 17 so as to cause gas discharge in the discharge cells 17. To form. Referring to FIG. 3, the sustain electrode 31 and the scan electrode 32 extend in the x-axis direction crossing the address electrode 11.

Each of the sustain electrode 31 and the scan electrode 32 includes transparent electrodes 31a and 32a for generating a discharge and bus electrodes 31b and 32b for applying a voltage signal to the transparent electrodes 31a and 32a, respectively. Is formed. The transparent electrodes 31 a and 32 a are portions which cause surface discharge inside the discharge cell 17 and are formed of a transparent material (for example, indium tin oxide (ITO)) to secure the aperture ratio of the discharge cell 17. The bus electrodes 31b and 32b are formed of a metal material having excellent electrical conductivity to compensate for the high electrical resistance of the transparent electrodes 31a and 32a.

The transparent electrodes 31a and 32a form surface discharge structures with each of the widths W31 and W32 from the outer edge of the discharge cell 17 along the y-axis direction, and form a center portion of each discharge cell 17. Discharge gap DG is formed. The bus electrodes 31b and 32b are disposed on the transparent electrodes 31a and 32a, respectively, and extend in the x-axis direction at the outside of the discharge cell 17. Therefore, when the voltage signal is applied to the bus electrodes 31b and 32b, the voltage signal is applied to each of the transparent electrodes 31a and 32a connected to the bus electrodes 31b and 32b.

Referring back to FIGS. 1 and 2, the sustain electrode 31 and the scan electrode 32 are covered with the second dielectric layer 23 while crossing the address electrodes 11 and facing each other corresponding to the discharge cells 17. It is possible. The second dielectric layer 23 forms and accumulates wall charges during discharge while protecting the sustain electrode 31 and the scan electrode 32 from gas discharge.

The second dielectric layer 23 is covered with the protective film 24. For example, the passivation layer 24 is formed of transparent MgO protecting the second dielectric layer 23 to increase the secondary electron emission coefficient upon discharge.

During the plasma display panel driving, a reset discharge is generated by a reset pulse applied to the scan electrode 32 in the reset period, and the scan pulse and the address electrode 11 applied to the scan electrode 32 in the scan period subsequent to the reset period. The address discharge is caused by an address pulse applied to the? Thereafter, in the sustain period, sustain discharge is caused by a sustain pulse applied to the sustain electrode 31 and the scan electrode 32.

The sustain electrode 31 and the scan electrode 32 serve as electrodes for applying sustain pulses required for sustain discharge, and the scan electrodes 32 serve as electrodes for applying reset pulses and scan pulses, and the address electrodes. Reference numeral 11 serves as an electrode for applying an address pulse. The sustain electrode 31, the scan electrode 32, and the address electrode 11 may have different roles depending on the voltage waveforms applied to the sustain electrodes 31, the scan electrodes 32, and the address electrodes 11, respectively.

The plasma display panel selects a discharge cell 17 to be turned on by the address discharge due to the interaction between the address electrode 11 and the scan electrode 32, and the interaction between the sustain electrode 31 and the scan electrode 32. The selected discharge cell 17 is driven by sustain discharge, thereby realizing an image.

On the other hand, in the plasma display panel of the first embodiment, the exhaust passage 18 is formed on the partition 16 to improve the exhaust performance, and the phosphor is coated by the dispenser method to form the white phosphor layer 29 on the exhaust passage 18. In forming, the coloring of the first dielectric layer 13 is used to prevent a decrease in bright room contrast.

In more detail, the first dielectric layer 13 is colored with a black color. When colored in black, since the absorption amount of visible light in the first dielectric layer 13 may be increased, the first dielectric layer 13 may be colored in brown.

When the first dielectric layer 13 is colored brown, the second dielectric layer 23 may be colored blue based so as to be black when viewed from the front surface of the front substrate 20. That is, black is implemented on the front substrate 20 which receives external light by the brown of the first dielectric layer 13 and the blue of the second dielectric layer 23. In addition, the first dielectric layer 13 may be colored black and the front substrate 20 may be colored blue.

The first dielectric layer 13 colored in black is at least one of materials such as chromium (Cr), cobalt (Co), manganese (Mn), ruthenia (Ru), Cu (copper), and antimony (Sb). It includes.

In addition, the partition wall 16 forms an exhaust passage 18 between the discharge cells 17 to improve the exhaust performance between the discharge cells 17. The exhaust passage 18 seals both substrates 10 and 20 during the manufacture of the plasma display panel, and then provides a passage when exhausting residual gas and filling discharge gas.

The exhaust passage 18 may be formed (not shown) in the y-axis direction and the x-axis direction. However, in the first embodiment, the exhaust passage 18 may minimize the area reduction of the discharge cells 17 irradiating visible light. Is formed.

In addition, the exhaust passage 18 has a predetermined passage area in a cross section (see Fig. 2) cut in the y-axis direction. This passage area is formed in the same size along the x-axis direction. The passage area of the exhaust passage 18 is partitioned by the partition 16, the first dielectric layer 13, and the protective film 24.

In order to describe the exhaust passage 18 in more detail, the partition wall 16 will be described in detail. The second partition wall member 16b is separated between the discharge cells 17 continuous in the y-axis direction and arranged side by side. The third partition member 116 and the fourth partition member 216 are formed.

Accordingly, the exhaust passage 18 is formed between the third partition member 116 and the fourth partition member 216. In addition, as the third partition member 116 and the fourth partition member 216 extend in the x-axis direction, the exhaust passage 18 has a uniform passage area and is formed long in the x-axis direction.

As such, the exhaust passage 18 having a uniform passage area along the x-axis direction can further improve the exhaust performance.

On the other hand, in order to form the phosphor layer 19 in the discharge cells 17, when the phosphor is applied by the dispenser method, as shown in Figure 3, the dispenser (not shown) moves in the arrow direction A1 while the phosphor Will be applied.

Therefore, the phosphor paste discharged from the dispenser forms the phosphor layer 19 in the discharge cell 17 and also forms the phosphor layer 29 in the exhaust passage 18. The phosphor layer 29 formed in the exhaust passage 18 is a portion formed by the dispenser method, and is not affected by the sustain electrode 31 and the scan electrode 32, and thus does not generate visible light even during sustain discharge. Do not.

That is, as the dispenser moves in the y-axis direction, the phosphor layer 19 is formed in the discharge cells 17, and the phosphor layer 29 is also formed in the exhaust passage 18 between the discharge cells 17. The phosphor layer 29 causes the exhaust passage 18 to partially narrow the passage area. That is, the passage area is formed by excluding the cross-sectional area of the phosphor layer 29 from the cross-sectional area defined by the third partition member 116, the fourth partition member 216, the first dielectric layer 13, and the passivation layer 24. do.

In addition, the first dielectric layer 13 includes a colored portion 13a that is colored only at a portion facing the exhaust passage 18 in order to minimize the area of the black portion and to prevent reduction of bright room contrast caused by the phosphor layer 29. do. That is, in the first dielectric layer 13, the colored portion 13a is formed long in the x-axis direction while facing the exhaust passage 18, as shown in FIG.

The coloring part 13a formed in this way is formed in the opposing part of the phosphor layer 29 formed in the exhaust path 18, and the area larger than this phosphor layer 29. Therefore, the improvement degree of the clear room contrast by the coloring part 13a becomes larger than the reduction degree of the clear room contrast by the fluorescent substance layer 29, and the bright room contrast improves as a whole in a plasma display panel.

4 is a plan view illustrating a disposition relationship between discharge cells and electrodes in a plasma display panel according to a second embodiment of the present invention, and FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4.

4 and 5 show a second embodiment different from the first embodiment. In the overall configuration, since the second embodiment is similar to or identical to the first embodiment, only the other parts of the second embodiment will be described here compared with the first embodiment.

As in the first embodiment, the partition wall 26 of the second embodiment is formed of the first partition member 26a and the second partition member 26b, and the second partition member 26b is the third partition member 126. ) And a fourth partition member 226.

In the second embodiment, the exhaust passage 28 is formed with the smallest size in the center of the x-axis direction of the discharge cell 17 among the passage areas formed in the cross section cut in the y-axis direction (see Fig. 5).

To this end, the second partition member 26b further includes a bridge partition 326 formed in the y-axis direction between the third partition member 126 and the fourth partition member 226. The bridge partition wall 326 connects the third partition member 126 and the fourth partition member 226 in the center of the x-axis direction of the discharge cell 17 between the discharge cells 17 adjacent in the y-axis direction. .

The bridge partition wall 326 forms a groove 326a. The groove 326a is formed in the bridge partition wall 326 facing the protective film 24 to form the smallest size of the passage area.

In the second embodiment, the bridge partition wall 326 inhibits the exhaust performance in the x-axis direction as compared with the first embodiment. Therefore, the groove 326a formed in the bridge partition wall 326 may add the exhaust performance by connecting the exhaust passage 28 in the x-axis direction.

In order to prevent the contrast of the first dielectric layer 33 in a narrow black area, in the second embodiment, the colored portion 33a of the first dielectric layer 33 is connected to the bridge partition wall 326 in the exhaust passage 28. Correspondingly formed.

This coloring part 33a prevents the reduction of the bright room contrast by the bridge partition 326 and the phosphor layer 29 formed around it. To this end, the colored portion 33a is formed to have a larger area than that of the phosphor layer 29.

6 is a plan view showing a disposition relationship between discharge cells and electrodes in a plasma display panel according to a third embodiment of the present invention.

6 shows a third embodiment different from the second embodiment. In the overall configuration, since the third embodiment is similar to or the same as the second embodiment, only the other parts of the third embodiment will be described here compared with the second embodiment.

As in the first and second embodiments, the partition wall 36 of the third embodiment is formed of the first partition member 36a and the second partition member 36b, and the second partition member 36b is the third partition member. 136 and the fourth partition member (236).

In the third embodiment, the exhaust passage 38 is formed with the smallest size in both the x-axis directions of the discharge cells 17 among the passage areas formed in the cross section cut in the y-axis direction.

The second embodiment forms the smallest passage area in the center of the x-axis direction of the discharge cell 17, whereas the third embodiment forms the smallest passage area in both the x-axis direction of the discharge cell 17. The structure for the passage area of the third embodiment is displayed in the same manner as in Fig. 5 of the second embodiment, and only its position is different. Therefore, the drawings are omitted.

The second embodiment includes one bridge partition wall 326 in one discharge cell 17, while the third embodiment includes two bridge partition wall 336 in one discharge cell 17. Therefore, the exhaust passage 38 of the third embodiment can have a lower exhaust performance than the exhaust passage 28 of the second embodiment.

However, since the discharge cells 17 are repeatedly formed in the x-axis direction and the bridge partition wall 336 is shared by the two discharge cells 17 in the x-axis direction, substantially the bridge partition wall 326 of the second embodiment and the third embodiment. In the example, the number of bridge partitions 336 may be considered to be the same.

In this case, the phosphor layer 29 formed in the exhaust passage 38 is formed between the two bridge partitions 336. In addition, the colored portion 43a of the first dielectric layer 43 is formed between the bridge partitions 336 to correspond to the phosphor layer 29.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

As described above, according to the plasma display panel according to the present invention, by applying a partition structure in which an exhaust passage is formed between discharge cells, applying a phosphor layer by a dispenser method, and coloring the first dielectric layer, the phosphor is discharged into the exhaust passage. Even in the state in which the layer is formed, there is an effect of preventing the decrease in bright room contrast.

Claims (16)

A first substrate and a second substrate spaced apart from each other; An address electrode extending in the first direction from the first substrate; A dielectric layer formed on the first substrate and covering the address electrode; Barrier ribs disposed on the dielectric layer to partition discharge cells corresponding to the address electrodes and form an exhaust passage; A phosphor layer formed in the discharge cell and the exhaust passage; And And a first electrode and a second electrode extending in the second substrate in a second direction crossing the first direction and formed to correspond to the discharge cells. According to claim 1, And the dielectric layer is colored black or brown. According to claim 1, The dielectric layer includes one of chromium (Cr), cobalt (Co), manganese (Mn), ruthenia (Ru), Cu (copper), and antimony (Sb). According to claim 1, And the exhaust passage is formed in the second direction. According to claim 1, And the dielectric layer includes a coloring part colored in a portion facing the exhaust passage. According to claim 1, The partition wall, First barrier members extending in the first direction and formed at intervals of the discharge cells along the second direction; And second partition wall members extending in the second direction between the first partition members and formed at intervals of the discharge cells along the first direction. The method of claim 6, And the second partition member includes a third partition member and a fourth partition member separated between the discharge cells continuous in the first direction to form the exhaust passage. The method of claim 7, wherein The second partition member, And a bridge barrier rib formed in the first direction between the third barrier member and the fourth barrier member. The method of claim 8, The bridge partition wall is disposed in the center of the second direction of the discharge cell between the discharge cells neighboring in the first direction. The method of claim 9, And a phosphor layer formed on the exhaust passage is formed on the bridge partition wall. The method of claim 10, The dielectric layer may include a coloring portion colored in correspondence with the bridge partition wall and the phosphor layer. The method of claim 8, And the bridge partition wall is disposed at both sides of the second direction of the discharge cells between the discharge cells neighboring the first direction. The method of claim 12, And a phosphor layer formed on the exhaust passage is formed between the bridge partition walls. The method of claim 13, And the dielectric layer includes a coloring part that is colored between the bridge partition walls and corresponding to the phosphor layer. The method of claim 8, The bridge partition wall includes a groove connecting the exhaust passage in the second direction. According to claim 1, Each of the first electrode and the second electrode, Bus electrodes disposed on both sides of the first direction of the discharge cell and extending in the second direction; And a transparent electrode protruding from the bus electrode toward the center of the discharge cell.

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