KR20080073886A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to adjust density of light irradiated from each of discharge cells by repeatedly forming a phosphor layer in the adjacent discharge cell along the first direction. A first substrate(10) and a second substrate(20) are arranged apart from each other. A barrier rib(16) is positioned in a space between the first and second substrates in order to define a plurality of discharge cells(18). An address electrode is extended in a first direction on the first substrate. A scan electrode(21) and a sustain electrode(22) are extended in a second direction on the second substrate in order to form a discharge gap corresponding to each of discharge cells. A phosphor layer(19) is formed in each of the discharge cells. The phosphor layer is repeatedly formed in the adjacent discharge cell along the first direction.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

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

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

3 is a plan view illustrating discharge cells and non-discharge cells partitioned by partition walls of the plasma display panel according to an exemplary embodiment of the present invention.

4 is a diagram illustrating a change in phosphor layer thickness of a plasma display panel according to an exemplary embodiment of the present invention.

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

10; Back substrate 20; Front board

16; Bulkhead 16a; First partition member

16b; Second partition wall member 16c; 3rd partition member

18; Discharge cell 30; Non-discharge Cell

19; Phosphor layer 19a; First phosphor layer

19b; Second phosphor layer

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 capable of reducing luminance unevenness by improving a phosphor layer structure of a plasma display panel.

In general, a plasma display panel (PDP) is formed by excitation of a phosphor using vacuum ultra violet (VUV) emitted from a plasma generated through gas discharge. An image is realized with visible light of R; Red), G (Green), and B (Blue).

The plasma display panel is classified into a direct current type and an alternating current type according to the applied driving voltage and the structure of the discharge cell. Hereinafter, a schematic configuration of an alternating current plasma display panel (hereinafter referred to as a plasma display panel) will be described.

In the plasma display panel, the front substrate and the rear substrate are spaced apart from each other. Address electrodes are formed on the back substrate and cover the address electrodes with a dielectric layer. The partition walls are disposed between the address electrodes on the dielectric layer to form a matrix (or stripe) shape. On the front substrate, display electrodes including a pair of sustain electrodes and scan electrodes are formed along a direction crossing the address electrodes. The display electrode is covered with a dielectric layer and a protective film (MgO protective film). In the above configuration, a discharge cell is formed at a point where the pair of address electrodes on the rear substrate and the pair of display electrodes on the front substrate cross each other. Phosphor layers of red (R), green (G), and blue (B) are formed inside the discharge cell. As described above, as the phosphor layers of each color are formed in the corresponding discharge cells, the red discharge cells, the green discharge cells, and the blue discharge cells are formed, and the red discharge cells, the green discharge cells, and the blue discharge cells each emit one set of light emission. A pixel is formed as a unit.

In the above-described plasma display panel, millions of unit discharge cells are arranged in a matrix form, and an image necessary for discharging the selected discharge cells among these discharge cells is displayed.

However, when the above method is used, when the alignment of the front substrate and the rear substrate of the plasma display panel is misaligned, the display electrode is also misaligned at the corresponding position of the discharge cell. Accordingly, a portion having low luminance and a portion having high luminance appear according to each discharge cell, and streaks may occur due to the difference.

The above phenomenon may be further exacerbated when it is difficult to align the front substrate and the rear substrate of the plasma display panel due to the small size of the discharge cell or other reasons.

SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display panel which can reduce a luminance non-uniformity phenomenon of a plasma display panel due to an alignment error between a front substrate and a rear substrate of the plasma display panel by improving the configuration of the phosphor layer constituting the plasma display panel. There is.

In order to achieve the above object, the present invention provides a barrier rib that partitions a plurality of discharge cells in a space between a first substrate and a second substrate, and a space between the first substrate and the second substrate, and a first direction on the first substrate. Formed in each of the address electrodes extending to the second substrate and the second substrate crossing the first direction to form a discharge gap corresponding to each discharge cell, and arranged to face each other. It includes a phosphor layer to be formed, it is preferable that the phosphor layer is formed repeatedly in alternating thickness to each of the discharge cells neighboring in the first direction.

In the above configuration, the scan electrode and the sustain electrode include a transparent electrode extending into each discharge cell, a bus electrode formed on one side of the transparent electrode at a portion corresponding to the partition wall, and the bus electrode is formed at a portion corresponding to the partition wall. Positioned in one direction, the length of the transparent electrode extending in each discharge cell may be located differently.

In addition, the scan electrodes and the sustain electrodes may be arranged with the same electrode at positions adjacent to adjacent discharge cells, and may be divided into odd lines and even lines according to the difference in length of the transparent electrodes extending into each discharge cell. .

The odd lines may be positioned to have a longer length of the transparent electrode extending into each discharge cell than the even lines.

The phosphor layer may include a first phosphor layer formed in a discharge cell corresponding to an odd line of the scan electrode, and a second phosphor layer formed in a discharge cell corresponding to an even line of the scan electrode.

The thickness of the second phosphor layer is formed thicker than the thickness of the first phosphor layer, and each thickness of the first phosphor layer and the second phosphor layer represents a thickness formed on the bottom surface of each discharge cell.

The ratio of the first phosphor layer thickness to the second phosphor layer thickness is the first phosphor layer thickness / second phosphor layer thickness ≦ 0.8.

On the other hand, the even lines may be longer than the odd lines, the length of the transparent electrode extending into each discharge cell.

The phosphor layer may include a first phosphor layer formed in a discharge cell corresponding to an odd line of the scan electrode, and a second phosphor layer formed in a discharge cell corresponding to an even line of the scan electrode.

The thickness of the first phosphor layer is formed to be thicker than the thickness of the second phosphor layer, and each thickness of the first phosphor layer and the second phosphor layer represents a thickness formed on the bottom surface of each discharge cell.

The ratio of the second phosphor layer thickness to the first phosphor layer thickness is the second phosphor layer thickness / first phosphor layer thickness ≤ 0.8.

The partition wall may partition the discharge cells and the non-discharge cells.

The partition wall includes a first partition member formed in a first direction, a second partition member formed in a second direction crossing the first partition member, and arranged at a distance from each other, and the second partition member includes a plurality of discharge cells. The first intervals formed are different from the second intervals at which the respective non-discharge cells are formed.

The first gap may be longer than the second gap, and may further include a third partition member connected in the first direction at the second gap to partition the non-discharge cells.

The third partition member may extend in the first partition member.

In addition, the phosphor layer may be formed to have the same thickness in each of the discharge cells neighboring in the second direction.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. While many specific details are set forth in order to provide a more general understanding of the invention, such as the following description and the annexed drawings, these specific details are illustrated for the purpose of illustrating the invention and are meant to limit the invention to those details. It is not. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

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

A configuration of a plasma display panel according to an exemplary embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The plasma display panel includes a first substrate 10 (hereinafter referred to as a "back substrate"), a second substrate 20 (hereinafter referred to as a "front substrate") and a rear substrate 10 which are disposed to face each other at a predetermined interval and are sealed. It includes a partition wall 16 provided between the front substrate 20.

In order to implement an image by gas discharge, the plasma display panel includes an address electrode 12, a scan electrode 21, and a Y electrode corresponding to each discharge cell 18 between the rear substrate 10 and the front substrate 20. ) And sustain electrode 22 (X electrode).

The address electrode 12 extends along the first direction (y-axis direction in the drawing) on the inner surface of the back substrate 10 and continuously corresponds to discharge cells 18 adjacent in the first direction. . In addition, the plurality of address electrodes 12 are arranged side by side to correspond to adjacent discharge cells 18 in a second direction (the x-axis direction of the drawing) that crosses the first direction. Since the address electrode 12 is disposed on the rear substrate 10 and does not prevent the visible light from being irradiated forward, the address electrode 12 may be formed of an opaque electrode (that is, a metal electrode having excellent conductivity). The address electrode 12 is disposed on the inner surface of the back substrate 10 and covered with the dielectric layer 14. The dielectric layer 14 prevents cations or electrons from directly colliding with the address electrode 12 during discharge, thereby preventing damage to the address electrode 12 and forming and accumulating wall charges.

The partition wall 16 is formed on the dielectric layer 14 at a predetermined height between the rear substrate 10 and the front substrate 20 to partition the plurality of discharge cells 18 and the non-discharge cells 30. The discharge cell 18 is filled with a discharge gas (eg, a mixed gas including neon (Ne), xenon (Xe), etc.) to generate vacuum ultraviolet rays by gas discharge, and emits visible light by absorbing the vacuum ultraviolet rays. The phosphor layer 19 is provided. The non-discharge cell 30 does not have a separate voltage applied therein, and is not intended to discharge or emit light. The non-discharge cells 30 partitioned by the partition walls 16 may be disposed at positions corresponding to the centers of the discharge cells 18. That is, the center line of each discharge cell 18 and the center line of the non-discharge cell 30 may be formed on the same line along the first direction. In addition, the first and second axial axes passing through the center of each discharge cell 18 may be disposed in an area surrounded by the second axial axes. The space of the non-discharge cells 30 may be formed to have an area wider than at least the width of each partition wall 16.

The partition wall 16 is formed in a second direction perpendicular to the first partition wall member 16a and the first partition wall member 16a formed in the first direction as shown in FIG. The discharge cells 18 are formed in a matrix structure by the combination of the second partition wall members 16b. The partition wall 16 further includes a third partition wall member 16c connected in a first direction between the second partition wall members 16b adjacent to each other as shown in FIG. 1 to partition the non-discharge cells 30. Include. The third partition member 16c extends to the first partition member 16a. Referring to FIGS. 1 and 2, the second partition wall members 16b are arranged to be spaced apart from each other, and a first gap in which each discharge cells 18 are formed along with the first non-discharge cells 30 are formed along the first direction. The second intervals are arranged differently. As shown in FIGS. 1 and 2, the first interval is formed longer than the second interval.

The phosphor layer 19 formed in each of the discharge cells 18 is formed by applying a phosphor paste on the side surface of the partition wall 16 and the surface of the dielectric layer 14 and firing it. The phosphor layer 19 is formed of phosphors of the same color in the discharge cells 18 formed along the first 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 18 repeatedly arranged along the second direction. The phosphor layer 19 is repeatedly formed in alternating thicknesses in the discharge cells 18 adjacent to each other along the first direction. The phosphor layer 19 is formed with the same thickness in each of the discharge cells 18 neighboring along the second direction.

On the other hand, the scan electrode 21 and the sustain electrode 22 are provided on the inner surface of the front substrate 20, so that the surface discharge structure corresponding to each discharge cell 18 so as to cause gas discharge in the discharge cell 18 Form. The scan electrode 21 and the sustain electrode 22 extend in a second direction crossing the address electrode 12.

Each of the scan electrode 21 and the sustain electrode 22 includes transparent electrodes 21a and 22a for generating a discharge and bus electrodes 21b and 22b for applying a voltage signal to the transparent electrodes 21a and 22a, respectively. do. Each of the transparent electrodes 21a and 22a is a part which causes surface discharge in the discharge cell 18, and is a transparent material (eg, indium tin oxide, ITO) to secure the aperture ratio of the discharge cell 18. Is formed. The bus electrodes 21b and 22b are formed of a metal material having excellent conductivity to compensate for the high electrical resistance of the transparent electrodes 21a and 22a.

In the above-described configuration, the scan electrodes 21 and the sustain electrodes 22 may be arranged with the same electrodes at positions adjacent to adjacent discharge cells 18. That is, as shown in FIG. 1, each of the scan electrodes 21 (Y0, Y1) and the sustain electrodes 22 (X0, X1) may be arranged (XX-YY driving method). In the embodiment of the present invention, the scan electrode 21 and the sustain electrode 22 are divided into odd lines (odd, Y1, and X1) and even lines (even, Y0, and X0) in the above configuration. The lines are divided into odd lines and even lines according to differences in the lengths of the transparent electrodes 21a and 22a. If the odd and even lines of the scan electrode 21 and the sustain electrode 22 are set regardless of the lengths of the transparent electrodes 21a and 22a extending into the respective discharge cells 18, each discharge cell ( 18) The lengths of the transparent electrodes 21a and 22a extending therein may be divided into long lines and short lines.

Meanwhile, referring to FIGS. 1 and 2, the scan electrode 21 and the sustain electrode 22 cross the address electrodes 12 and are covered with the dielectric layer 28 facing each other corresponding to the discharge cells 18. . The dielectric layer 28 forms and accumulates wall charges during discharge while protecting the scan electrodes 21 and sustain electrodes 22 from gas discharge. The dielectric layer 28 is covered with the protective film 29. The passivation layer 29 is formed of magnesium oxide (MgO) that protects the dielectric layer 28 to increase the secondary electron emission coefficient upon discharge.

In the driving of the plasma display panel having the above-described configuration, in the reset period, reset discharge is caused by a reset pulse applied to the sustain electrode 22. In the addressing period following the reset period, address discharge is caused by a scan pulse applied to the sustain electrode 22 and an address pulse applied to the address electrode 12. Thereafter, in the sustain period, sustain discharge is caused by a sustain pulse applied to the scan electrode 21 and the sustain electrode 22.

The scan electrodes 21 and the sustain electrodes 22 serve as electrodes for applying sustain pulses required for sustain discharge, and the sustain electrodes 22 serve as electrodes for applying reset pulses and scan pulses. The address electrode 12 serves as an electrode for applying an address pulse. The scan electrode 21, the sustain electrode 22, and the address electrode 12 may have different roles depending on the voltage waveforms applied to the scan electrodes 21, the sustain electrodes 22, and the address electrodes 12, respectively.

The plasma display panel selects a discharge cell 18 to be turned on by the address discharge due to the interaction of the address electrode 12 and the sustain electrode 22, and the interaction between the scan electrode 21 and the sustain electrode 22. An image is realized by driving the selected discharge cells 18 by the sustain discharge.

However, when the front substrate 10 and the rear substrate 20 of the plasma display panel are misaligned when aligned, the scan electrode 21 and the sustain electrode 22 are displaced at the corresponding positions of the respective discharge cells 18. . That is, as shown in FIGS. 2 and 3, each of the bus electrodes 21b and 22b is oriented in the first direction at a portion corresponding to the second partition 16b, and each of the transparent electrodes 21a and 22a is respectively oriented. The lengths extending into the discharge cells 18 are positioned differently.

If the plasma display panel is manufactured in ultra high definition (FHD), the discharge cell pitch of the ultra high definition plasma display panel is significantly reduced compared to the fixed detail. In addition, when using the double partition wall as in the embodiment of the present invention, the discharge space is further reduced. In addition, since the longitudinal length of the transparent electrode has a set length, the alignment of the front substrate and the rear substrate should be precisely aligned.

In this state, the misalignment between the front substrate and the rear substrate becomes more severe, and in order to reduce the reactive power consumption, when the plasma display panel is manufactured by the XX-YY driving method as in the embodiment of the present invention, an even or odd line is used. Only one line can be lowered in brightness. That is, due to misalignment between the front substrate and the back substrate, odd lines may be reset and scan well, and even lines may not be well reset and scan, resulting in a difference in luminance.

When the XX-YY driving method is applied to the ultra-fine discharge cell structure and the double barrier rib structure, the gap between the front substrate and the back substrate becomes greater due to the narrower discharge space (the discharge cell pitch becomes smaller). do. In addition, since the driving scan electrode 21 and the sustain electrode 22 are asymmetrical in the XX-YY structure, the even-numbered transparent electrodes exposed to the discharge cells become smaller in the same scan. Therefore, the reset and the addressing are not so good that the discharge is disadvantageous and the light intensity is weakened, resulting in uneven brightness.

The embodiment of the present invention is the front substrate and the back substrate in the plasma display panel using the discharge cell structure of the ultra-fine (discharge cell pitch is less than the set size (730㎛)) and the double barrier rib structure of the electrode structure of the XX-YY drive method Even if the alignment is misaligned, it is possible to reduce the occurrence of luminance unevenness of even and odd lines. That is, the embodiment of the present invention improves the streaks caused in the second direction by varying the thickness of the phosphor corresponding to each discharge cell in the above-described plasma display panel so that the luminance difference between the odd lines and the even lines does not occur. Can be.

3 is a plan view illustrating discharge cells and non-discharge cells partitioned by partition walls of the plasma display panel according to an exemplary embodiment of the present invention.

As described above, in the exemplary embodiment of the present invention, the scan electrode 21 and the sustain electrode 22 may be divided into odd lines and even lines according to differences in lengths of the transparent electrodes 21a and 22a extending into the respective discharge cells. .

For example, the odd lines may be set such that the lengths of the transparent electrodes 21a and 22a extending into the respective discharge cells 18 are longer than the even lines. Referring to FIG. 3, since the area of the scan electrode exposed to the discharge cells of the odd line Y1 is larger than the area of the scan electrode exposed to the discharge cells of the even line Y0, the reset and the address of the odd line Y1 may be reduced. Since the reset and the address are relatively poor in the even line Y0, the luminance of the discharge cells on the even line Y0 is lower than that of the discharge cells on the odd line Y0. Therefore, the striped unevenness is generated along the second direction according to the difference between the low luminance portion and the high luminance portion.

In this case, as shown in FIGS. 2 and 3, the phosphor layer 19 has an even number of the first phosphor layer 19a and the scan electrode 21 formed in the discharge cells corresponding to the odd lines of the scan electrode 21. The second phosphor layer 19b formed in the discharge cell corresponding to the line may be divided. The thickness t2 of the second phosphor layer 19b is formed to be thicker than the thickness t1 of the first phosphor layer 19a. Here, each of the thicknesses of the first phosphor layer 19a and the second phosphor layer 19b refers to a thickness formed on the bottom surface of each discharge cell 18. For reference, since the thickness formed on the bottom surface of each discharge cell 18 is correlated with the thicknesses t3 and t4 formed on the side surface, the thickness of the phosphor layer formed on the bottom surface is thicker. In addition, it can be formed thick regardless of the thickness of the bottom surface.

The ratio between the thickness t2 of the first phosphor layer 19a and the thickness t1 of the second phosphor layer 19b according to the embodiment of the present invention may be set to 0.8 or less. (First phosphor layer thickness / second phosphor) Layer thickness≤0.8)

4 is a diagram illustrating a change in phosphor layer thickness of a plasma display panel according to an exemplary embodiment of the present invention.

Referring to FIG. 4, when the front substrate 10 and the rear substrate 20 are misaligned, and when streaks occur due to the difference in luminance, the thickness of the phosphor layer is divided into before and after improvement, respectively, in odd and even lines. The change in the side thickness (side thickness) and the bottom thickness (base thickness) of the corresponding phosphor layer can be seen. The unit for the thickness of the phosphor layer is μm. The thickness change of the phosphor layer may be made by adjusting the injection amount. For example, when the odd lines and the even lines are alternately repeatedly generated in the luminance difference, the ejection openings of the fluorescent screen mask of the odd lines that are well aligned are applied small. And, the injection hole of the even-line fluorescent screen mask which is not aligned well is applied largely. By adjusting the balance of the luminance difference in the above-described method it is possible to improve the line direction unevenness.

First, before improving the thickness of the phosphor layer, the phosphor thickness was formed by applying the same injection amount of the phosphor material, and when the phosphor layer thickness was divided into odd lines and even lines, the thickness of the side of the phosphor layer on the odd line was 10.9. The bottom thickness is 7.6. In addition, the thickness of the side surface of the phosphor layer of the even lines is 10.5, and the thickness of the bottom surface is 7.4. As described above, before the thickness of the phosphor layer is improved, there is less variation in the thickness of the phosphor layer between odd lines and even lines.

On the contrary, in the case of forming the phosphor thickness by adjusting the injection amount of the phosphor material as in the embodiment of the present invention, when the phosphor layer thickness is divided into odd lines and even lines, the thickness of the phosphor layer side of the odd lines is 11.1. The thickness of the bottom surface is 7.2. In addition, the even line thickness of the phosphor layer side surface is 13.1 and the bottom surface thickness is 10.4. As described above, after the thickness of the phosphor layer is improved, the variation in the thickness of the phosphor layer between odd and even lines is larger than before the improvement. For odd lines, the side thickness increased by 0.2 and the bottom thickness decreased by 0.4. On the other hand, for even lines, the side thickness increased by 2.6 and the bottom thickness increased by 3.0. Therefore, the ratio between the thickness of the second phosphor layer 19b and the thickness of the first phosphor layer 19a according to the embodiment of the present invention is made 0.8 or less. (7.2 / 10.4 ≦ 0.69)

By adjusting the ratio, the density of light emitted from each of the discharge cells corresponding to the odd lines and the even lines may be uniformly adjusted, thereby improving the problem of unevenness in the line direction due to uneven brightness.

On the other hand, the detailed description of the present invention has been described with reference to specific embodiments, of course, various modifications are possible without departing from the scope of the invention.

In the above-described embodiment, the odd lines are described as having longer lengths of the transparent electrodes 21a and 22a extending into each discharge cell 18 than the even lines. However, those skilled in the art will appreciate You can improve the settings for odd and even lines differently.

For example, the even lines may be set to have longer lengths of the transparent electrodes 21a and 22a extending into the respective discharge cells 18 than the odd lines.

Even in this case, the phosphor layer 19 is formed in the discharge cells corresponding to the even lines of the first phosphor layer 19a and the scan electrode 21 formed in the discharge cells corresponding to the odd lines of the scan electrodes 21. It may be divided into the second phosphor layer 19b. However, the thickness of the first phosphor layer 19a is formed to be thicker than the thickness of the second phosphor layer 19b. Here, each of the thicknesses of the first phosphor layer 19a and the second phosphor layer 19b refers to a thickness formed on the bottom surface of each discharge cell 18. The ratio between the thickness of the second phosphor layer 19b and the thickness of the first phosphor layer 19a may be set to 0.8 or less. (Second phosphor layer thickness / first phosphor layer thickness ≤ 0.8)

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below but also by the equivalents of the claims.

As described above, the plasma display panel according to the present invention has an effect of adjusting the density of light emitted from each discharge cell by improving the configuration of the phosphor layer constituting the plasma display panel.

In addition, there is an effect of reducing the luminance non-uniformity phenomenon of the plasma display panel by adjusting the thickness of the phosphor layer of the corresponding discharge cell according to the alignment error of the front substrate and the rear substrate of the plasma display panel.

Claims (22)

A first substrate and a second substrate spaced apart from each other; Barrier ribs defining a plurality of discharge cells in a space between the first substrate and the second substrate; An address electrode extending in the first direction on the first substrate; Scan electrodes and sustain electrodes formed on the second substrate in a second direction crossing the first direction to form discharge gaps corresponding to the discharge cells, and arranged to face each other; It includes a phosphor layer formed in each discharge cell, And the phosphor layer is repeatedly formed in alternating thicknesses in the discharge cells adjacent to each other along the first direction. The method of claim 1, The scan electrode and the sustain electrode A transparent electrode extending into each of the discharge cells; And a bus electrode formed at one side of the transparent electrode in a portion corresponding to the partition wall. The method of claim 2, And the bus electrodes are disposed in the first direction in a portion corresponding to the partition wall, and the transparent electrodes are positioned to have different lengths extending into the respective discharge cells. The method of claim 3, The scan electrode and the sustain electrode A plasma display panel in which the same electrodes are arranged at positions adjacent to adjacent discharge cells. The method of claim 4, wherein The scan electrode and the sustain electrode The plasma display panel is divided into an odd line and an even line according to the difference in length of the transparent electrode extending into each discharge cell. The method of claim 5, And wherein the odd lines are longer than the even lines and have a longer length of the transparent electrode extending into each discharge cell. The method of claim 6, The phosphor layer is A first phosphor layer formed in a discharge cell corresponding to an odd line of the scan electrode; And a second phosphor layer formed in a discharge cell corresponding to an even line of the scan electrode. The method of claim 7, wherein And the thickness of the second phosphor layer is thicker than the thickness of the first phosphor layer. The method of claim 8, And the thicknesses of the first phosphor layer and the second phosphor layer are formed on the bottom surface of each discharge cell. The method of claim 9, The ratio of the thickness of the first phosphor layer to the thickness of the second phosphor layer is A plasma display panel, wherein the first phosphor layer thickness / second phosphor layer thickness ≤ 0.8. The method of claim 5, And the even line is positioned to have a longer length of the transparent electrode extending into each discharge cell than the odd line. The method of claim 11, The phosphor layer is A first phosphor layer formed in a discharge cell corresponding to an odd line of the scan electrode; And a second phosphor layer formed in a discharge cell corresponding to an even line of the scan electrode. The method of claim 12, And the thickness of the first phosphor layer is thicker than the thickness of the second phosphor layer. The method of claim 13, And the thicknesses of the first phosphor layer and the second phosphor layer are formed on the bottom surface of each discharge cell. The method of claim 14, The ratio of the thickness of the second phosphor layer and the thickness of the first phosphor layer is And a second phosphor layer thickness / first phosphor layer thickness ≤ 0.8. The method according to any one of claims 1 to 15, The barrier rib partitions discharge cells and non-discharge cells. The method of claim 16, The partition wall may include a first partition member formed in the first direction; And a second partition wall member formed in a second direction crossing the first partition member and arranged at intervals from each other. The method of claim 17, The second partition member has a first gap in which the respective discharge cells are formed and a second gap in which the non-discharge cells are formed are arranged differently from each other. The method of claim 18, And the first interval is longer than the second interval. The method of claim 19, And a third partition member connected in the first direction at the second interval to partition the non-discharge cells. The method of claim 20, The third partition member extends in the first partition member plasma display panel. The method of claim 1, And the phosphor layer is formed to have the same thickness in each of the discharge cells neighboring in the second direction.

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