KR100521478B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel capable of increasing the PDP efficiency while maintaining an appropriate discharge efficiency by optimizing the area ratio of the discharge sustaining electrode to the discharge cell area, the plasma display panel comprising: a first and a second substrate; Address electrodes formed on the first substrate; A partition wall disposed in a space between the first substrate and the second substrate to partition the discharge cells and to form a non-discharge region between the discharge cells; A discharge sustaining electrode formed on the second substrate, wherein the discharge sustaining electrode includes a bus electrode corresponding to each pair of discharge cells, and a protruding electrode extending from the bus electrode toward the center of each discharge cell; When the area of each discharge cell including the non-discharge area is S1 and the area occupied by the protruding electrode in each discharge cell is s, the following conditions are satisfied.

0.3 ≤ s / S1 ≤ 0.8

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel in which a discharge sustaining electrode causing sustain discharge in a discharge cell is composed of a metal bus electrode and a transparent protruding electrode.

In general, a plasma display panel (PDP) is a display device for realizing an image by exciting phosphors by vacuum ultraviolet rays caused by gas discharge occurring in a discharge cell. It is attracting attention as the next generation thin display device.

These PDPs are classified into AC type and DC type according to the voltage application method, and are divided into counter discharge type and surface discharge type according to the configuration of the electrodes. Recently, AC type PDPs having a 3-electrode surface discharge structure have been commonly used. .

Referring to FIG. 8, in the conventional AC PDP, an address electrode 3, a partition 5, and a fluorescent layer 7 are formed on the rear substrate 1 to correspond to each discharge cell, and the front substrate 9 is formed on the rear substrate 1. The discharge holding electrode 15 which consists of the scan electrode 11 and the display electrode 13 is formed. The address electrode 3 and the discharge sustain electrode 15 are covered with respective dielectric layers 17 and 19, and the discharge cells are filled with discharge gas (mainly Ne-Xe mixed gas). For reference, reference numeral 21 in the drawing represents an MgO protective film.

With the above configuration, an address voltage Va is applied between the address electrode 3 and the scan electrode 11 to select a discharge cell in which light emission is to occur through the address discharge, and the scan electrode 11 and the display of the selected discharge cell are displayed. When the sustain voltage Vs is applied between the electrodes 13, a plasma discharge occurs in the discharge cell, and vacuum ultraviolet rays are emitted from the excitation atoms of Xe generated during the plasma discharge. The vacuum ultraviolet rays excite the fluorescent layer 7 of the discharge cell and convert it into visible light, thereby enabling color display.

In the PDP operating as described above, the discharge sustain electrode 15 generates sustain discharge in the discharge cell and thus serves to draw vacuum ultraviolet rays and visible light, so that the shape of the discharge sustain electrode 15 is PDP efficiency (luminance ratio to power consumption). Is closely related to Considering this, the conventional discharge sustaining electrode 15 is formed of a stripe pattern orthogonal to the address electrode 3, and includes transparent electrodes 11a and 13a having excellent light transmittance, and It is common to use bus electrodes 11b and 13b made of metal with extremely low resistance.

However, in the PDP having the above-described configuration, the discharge sustaining electrode 15 occupies a large area in the discharge cell, thereby lowering the screen brightness by lowering the aperture ratio of the PDP and increasing power consumption by increasing the discharge current. Accordingly, there is a demand for development of a structure that increases the PDP efficiency by optimizing the occupied area of the discharge sustaining electrode 15 in the discharge cell while maintaining an appropriate discharge efficiency.

Accordingly, an object of the present invention is to solve the above problems, and an object of the present invention is to optimize the area ratio of the discharge sustaining electrode to the discharge cell area to increase the PDP efficiency (luminance ratio to power consumption) while maintaining an appropriate discharge efficiency. It is to provide a plasma display panel that can be.

In order to achieve the above object, the present invention,

First and second substrates, address electrodes formed on the first substrate, partition walls disposed in a space between the first and second substrates to partition discharge cells, and forming a non-discharge region between the discharge cells; A fluorescent layer formed in the discharge cell, and discharge holding electrodes formed on the second substrate, wherein the discharge holding electrode extends from the bus electrode toward the center of each discharge cell and a pair of bus electrodes corresponding to each discharge cell; A plasma display panel including the protruding electrodes formed so as to face each other, the area of each discharge cell including the non-discharge area is S1, and the area occupied by the protruding electrode in each discharge cell is s. To provide.

0.3 ≤ s / S1 ≤ 0.8

Preferably, the barrier rib has a lattice shape including a first barrier member in a direction of an address electrode and a second barrier member in a direction of a discharge sustain electrode, and the protrusion electrode is formed of a rectangular transparent electrode. When the area of each discharge cell excluding the non-discharge area is S2 and the area occupied by the protruding electrode in each discharge cell is s, the following conditions are satisfied.

0.5 ≤ s / S2 ≤ 0.95

In addition, the present invention, in order to achieve the above object,

First and second substrates, address electrodes formed on the first substrate, a partition wall disposed in a space between the first substrate and the second substrate to partition discharge cells and non-discharge regions, and a fluorescent layer formed in the discharge cell And discharge sustain electrodes formed on the second substrate, wherein the non-discharge area is disposed in an area surrounded by an imaginary horizontal axis and a vertical axis passing through the center of each discharge cell, and the discharge sustain electrodes correspond to a pair of discharge cells. A bus electrode and a protruding electrode extending from the bus electrode toward the center of each discharge cell, the protruding electrode being formed so as to face each other, and the area of each discharge cell including the non-discharge area and the partition wall is called S3, and the protruding electrode in each discharge cell. When the area occupied is s, a plasma display panel that satisfies the following conditions is provided.

0.37 ≤ s / S3 ≤ 0.51

Preferably, the discharge cells are formed narrower as the widths of both ends located in the direction of the address electrode move away from the center of the discharge cells, and the depth measured from the top of the partition wall at both ends located in the direction of the address electrode is discharge cell. The further away from the center of the formed smaller. The protruding electrode has a shape in which a rear end portion of the protruding electrode is gradually narrowed toward the bus electrode.

When the area of each discharge cell excluding the non-discharge area and the partition wall is S4, and the area occupied by the protruding electrode in each discharge cell is s, the following conditions are satisfied.

0.55 ≤ s / S4 ≤ 0.95

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

1 is a partially exploded perspective view of a plasma display panel according to a first exemplary embodiment of the present invention, and FIG. 2 is a partial plan view illustrating an assembled state of FIG. 1.

Referring to the drawings, in the plasma display panel according to the present embodiment (hereinafter referred to as 'PDP'), the first substrate 2 and the second substrate 4 are disposed to face each other at arbitrary intervals, and between the two substrates. Discharge cells 6R, 6G and 6B are provided in the space to implement an arbitrary color image with visible light emission by an independent discharge mechanism of each discharge cell 6R, 6G and 6B.

In detail, the address electrodes 8 are formed in one direction (Y direction of the drawing) on the inner surface of the first substrate 2, and cover the address electrodes 8 to cover the first substrate 2. The lower dielectric layer 10 is formed over the entire inner surface. The address electrodes 8 are formed in a stripe pattern, for example, and are arranged side by side with a predetermined distance from the neighboring address electrodes 8.

A partition 12, for example, a lattice 12, is formed on the lower dielectric layer 10, and red, green, and blue fluorescent layers 14R may be disposed on four sides of the partition 12 and the upper surface of the lower dielectric layer 10. 14G, 14B). The partition 12 includes a first partition member 12a along the address electrode 8 direction and a second partition member 12b along the direction orthogonal to the address electrode 8 (the X direction in the drawing). Inside the discharge cells 6R, 6G, 6B surrounded by the first and second partition members 12a, 12b are filled with discharge gas (mainly Ne-Xe mixed gas).

On the inner surface of the second substrate 4 facing the first substrate 2, discharge sustaining electrodes 20 made up of the scan electrode 16 and the display electrode 18 are arranged in a direction orthogonal to the address electrode 8. The upper dielectric layer 22 and the MgO passivation layer 24 are disposed on the entire inner surface of the second substrate 4 while covering the discharge sustain electrodes 20.

In this embodiment, the discharge sustaining electrode 20 is a stripe pattern bus electrode 16a, 18a corresponding to each of the discharge cells 6R, 6G, and 6B, and each discharge cell from the bus electrodes 16a, 18a. It extends toward the center of 6R, 6G, 6B, and consists of projecting electrodes 16b, 18b which a pair opposes across arbitrary discharge gaps G between them. As the protruding electrodes 16b and 18b, a transparent electrode such as indium tin oxide (ITO) is preferable, and as the bus electrodes 16a and 18a, a metal electrode having excellent conductivity such as silver (Ag) is preferable.

With the above-described configuration, when the address voltage Va is applied between the address electrode 8 and the scan electrode 16 of a specific discharge cell (for example, a red discharge cell), an address discharge occurs in the discharge cell 6R, As a result of the address discharge, wall charges accumulate on the upper dielectric layer 22 covering the discharge sustain electrode 20. The wall charge generates a wall voltage Vw between the scan electrode 16 and the display electrode 18 to select the discharge cell 6R.

Subsequently, when the sustain voltage Vs is applied between the scan electrode 16 and the display electrode 18 of the selected discharge cell 6R, the sum of the sustain voltage Vs and the wall voltage Vw is required for the actual plasma discharge. Plasma discharge, that is, sustain discharge, occurs from the discharge gap G between the scan electrode 16 and the display electrode 18 while exceeding the discharge start voltage Vf. Vacuum ultraviolet rays are emitted from the excitation atoms of Xe produced during such plasma discharge, and the vacuum ultraviolet rays excite the fluorescent layer 14R and convert it into visible light, thereby enabling color display.

Here, the PDP according to the present embodiment optimizes the area occupied by the discharge holding electrodes 20, in particular, the protruding electrodes 16b and 18b, in the discharge cells 6R, 6G and 6B. The structure which can raise PDP efficiency while maintaining an appropriate discharge efficiency in the inside is applied.

3 is a partially enlarged view of FIG. 2, with reference to FIG. 3, illustrating a preferred area ratio of the protruding electrode to the discharge cell region.

Referring to the drawings, the horizontal pitch of the discharge cells 6R, 6G, 6B in the discharge sustaining electrode direction (X direction in the figure) is referred to as H1, and the discharge cells 6R, in the address electrode direction (Y direction in the figure). When the vertical pitch of 6G, 6B is V1, the area S1 of the discharge cell 6R, 6G, 6B including the non-discharge area, that is, the partition wall 12, is a product of H1 and V1 (S1 = H1 × V1). Can be defined

The horizontal lengths of the protruding electrodes 16b and 18b in the discharge sustaining electrode direction (the X direction in the drawing) are referred to as a, and the vertical lengths of the protruding electrodes 16b and 18b in the address electrode direction (the Y direction in the drawing) are referred to as a. In the case of b, the area s of the protruding electrode in each discharge cell may be defined as a value obtained by multiplying a by b and 2 (s = 2 × a × b).

At this time, in the PDP according to the present embodiment, the area s of the protruding electrodes 16b and 18b with respect to the area S1 of the discharge cells 6R, 6G, and 6B including the non-discharge area satisfies the following condition. .

In FIG. 3, the horizontal lengths of the discharge cells 6R, 6G, and 6B in the discharge sustaining electrode direction (X direction in the drawing) are referred to as H2, and the discharge cells 6R, in the address electrode direction (Y direction in the drawing). When the vertical lengths of 6G and 6B are V2, the area S2 of the pure discharge cells 6R, 6G and 6B excluding the non-discharge region can be defined as the product of H2 and V2 (S2 = H2 x V2).

At this time, in the PDP according to the present embodiment, the ratio of the area s of the protruding electrodes 16b and 18b to the area S2 of the pure discharge cells 6R, 6G, and 6B excluding the non-discharge area satisfies the following condition. do.

In the above Equation 1, when the s / S1 ratio is less than 0.3 and the s / S2 ratio is less than 0.5 in Equation 2, driving of the PDP becomes difficult due to an excessive increase in the discharge voltage, and the luminance decreases so strongly that the PDP efficiency is lowered. . In addition, in the condition that the s / S1 ratio exceeds 0.8 in Equation 1 and the s / S2 ratio exceeds 0.95 in Equation 2, the resistance values of the protruding electrodes 16b and 18b are excessively increased, and the scan is performed during the electrode manufacturing process. There is a disadvantage that it is difficult to maintain an appropriate gap between the electrode 16 and the display electrode 18.

Therefore, since the PDP according to the present embodiment includes the discharge sustaining electrode 20 that satisfies the conditions of the above-described equations (1) and (2), a sufficient aperture ratio is ensured to increase the screen brightness and limit the discharge current to consume power. By lowering the PDP efficiency (luminance ratio to power consumption) is increased.

Preferably, the protruding electrodes 16b and 18b of the above-described configuration maintain the vertical length b in the address electrode direction as it is, and change the horizontal length a in the discharge sustain electrode direction to change the scan electrode 16 and the scan electrode 16. While maintaining the discharge gap G between the display electrodes 18, the area is adjusted to satisfy the conditions of the above-described equations (1) and (2).

4 is a partially exploded perspective view of a PDP according to a second embodiment of the present invention, and FIGS. 5 and 6 are partial plan views and partial cross-sectional views respectively illustrating an assembled state of FIG. 4.

Referring to the drawings, in this embodiment, the partition wall 12 is formed to partition the non-discharge regions 26 together with the discharge cells 6R, 6G, 6B. Here, the discharge cells 6R, 6G, 6B are spaces where gas discharge and light emission are supposed to occur, and the non-discharge regions 26 mean areas or spaces where gas discharge and light emission are not intended. The drawing shows an embodiment in which discharge cells 6R, 6G, 6B and non-discharge regions 26 are each formed to have independent cell structures.

More specifically, the partition wall 12 partitions the discharge cells 6R, 6G, and 6B along the address electrode direction (Y direction in the figure) and the direction orthogonal to the address electrode (X direction in the figure), and each discharge The cells 6R, 6G and 6B have an optimized shape in consideration of the diffusion form of the discharge gas. In addition, assuming a virtual horizontal axis (H) and a vertical axis (V) passing through the center of each discharge cell (6R, 6G, 6B), the non-discharge area 26 in the area surrounded by the horizontal axis (H) and the vertical axis (V). ) Is located.

The optimized structure of the discharge cells 6R, 6G, and 6B is a shape in which each of the discharge cells 6R, 6G, and 6B substantially minimizes a small degree of contribution to sustain discharge and brightness enhancement. It means a shape in which the widths of both ends positioned in the direction of the address electrode 8 in each of the discharge cells 6R, 6G, and 6B become narrower as the distance from the center of the discharge cells 6R, 6G, and 6B increases.

That is, referring to FIG. 4, the width Wc at the center of the discharge cells 6R, 6G, and 6B is made larger than the width We at the end, and the width We at the end is the discharge cell 6R, 6G, 6B) shows a characteristic that becomes narrower away from the center. As a result, both ends of the discharge cells 6R, 6G, 6B have a trapezoidal shape, and the overall planar shape of each discharge cell 6R, 6G, 6B is octagonal.

The non-discharge region 26 is disposed in an area surrounded by the virtual horizontal axis H and the vertical axis V passing through the center of each discharge cell 6R, 6G, 6B, in particular the center thereof is the horizontal axis H and the vertical axis. It may be formed to coincide with the center of the region surrounded by (V). That is, in the above structure, one common non-discharge region is formed between a pair of discharge cells adjacent in the direction of the address electrode 8 and a pair of discharge cells neighboring in the direction orthogonal to the address electrode 8. 26 is located.

As a result, the partition 12 may include a first partition member 12a in a direction parallel to the address electrode 8, and a second partition wall connecting the first partition members 12a without being parallel to the address electrode 8. The second partition wall member 12b 'may be formed to intersect the first partition wall member 12a at a predetermined inclination angle. In particular, in the present embodiment, the second partition member 12b 'has an approximately X-shape between discharge cells neighboring in the direction of the address electrode 8.

6, the depth De measured from the upper end of the partition 12b 'at both ends of the discharge cell 6R located in the address electrode direction (Y direction in the drawing) is the center of the discharge cell 6R. The further away from it, the smaller it is formed. That is, the depth De at the end of the discharge cell 6R is smaller than the depth Dc at the center portion, and the depth De at the end gradually becomes shallower as it moves away from the center of the discharge cell 6R. The depth characteristics of the discharge cells 6R are equally applied to the green discharge cells 6G and the blue discharge cells 6B.

The discharge sustaining electrode 20 formed on the second substrate 4 is formed from the metal bus electrodes 16a and 18a and the bus electrodes 16a and 18a as shown in the above-described embodiment. It extends toward the center of 6B) and consists of projecting electrodes 16b and 18b facing each other with an arbitrary discharge gap G therebetween.

At this time, the protruding electrodes 16b and 18b correspond to the shapes of the discharge cells 6R, 6G and 6B, and both sides of the rear end discharge cells 6R and 6G corresponding to both ends of the discharge cells 6R, 6G and 6B. , 6B) is formed parallel to the inner wall. That is, in the present embodiment, the rear ends of the protruding electrodes 16b and 18b have a trapezoidal shape that narrows toward the bus electrodes 16a and 18a so as to match the end shapes of the discharge cells 6R, 6G and 6B.

By the above-described configuration, if the sustain voltage Vs is applied between the scan electrode 16 and the display electrode 18 after the address discharge to generate the plasma discharge, the plasma discharge is formed in the outer portion of the discharge cells 6R, 6G, 6B. It diffuses and then disappears while drawing an arc shape toward each other. In this embodiment, as each discharge cell 6R, 6G, 6B is shaped in accordance with the diffusion form of the plasma discharge, the discharge cells 6R, 6G 6B) Efficient sustain discharge is generated in all areas inside, improving discharge efficiency.

In addition, the discharge cells 6R, 6G, and 6B have contact areas of the fluorescent layers 14R, 14G, and 14B with respect to the main discharge region toward the outer edges of the discharge cells 6R, 6G, and 6B by the cross-sectional shape shown in FIG. To increase the luminous efficiency. Furthermore, the non-discharge region 26 located between the discharge cells 6R, 6G, and 6B absorbs heat from the neighboring discharge cells and releases the heat to the outside of the PDP, thereby enhancing heat dissipation characteristics of the PDP.

Here, the PDP according to the present embodiment optimizes the area occupied by the discharge sustaining electrodes 20, in particular, the protruding electrodes 16b and 18b, in the discharge cells 6R, 6G, and 6B as in the above-described embodiment. 6R, 6G, 6B) is applied to the configuration that can increase the PDP efficiency while maintaining the proper discharge efficiency.

FIG. 7 is a partially enlarged view of FIG. 5 and a preferred area ratio of the protruding electrode to the discharge cell region will be described with reference to FIG. 5.

Referring to the drawings, the horizontal pitch of the discharge cells 6R, 6G, 6B in the discharge sustain electrode direction (X direction in the figure) is referred to as H3, and the discharge cells 6R, in the address electrode direction (Y direction in the figure). When the vertical pitch of 6G and 6B is V3, the area S3 of the discharge cells 6R, 6G and 6B including the non-discharge area (the non-discharge area and the partition wall in this embodiment) is the product of H3 and V3 (S3). = H3 x V3).

The maximum horizontal length of the protruding electrodes 16b and 18b in the discharge sustaining electrode direction (the X direction in the drawing) is referred to as a, the minimum horizontal length is referred to as a ', and the protruding along the address electrode direction (the Y direction in the drawing). When the maximum vertical length of the electrodes 16b and 18b is b and the minimum vertical length is b ', the area s of the protruding electrodes 16b and 18b in each of the discharge cells 6R, 6G and 6B is It can be defined by the following equation.

At this time, in the PDP according to the present embodiment, the area s of the protruding electrodes 16b and 18b with respect to the area S3 of the discharge cells 6R, 6G and 6B including the non-discharge areas 26 and 12 is as follows. Make sure the conditions are met.

In FIG. 7, the maximum horizontal length of the discharge cells 6R, 6G, and 6B in the discharge holding electrode direction (X direction in the drawing) is referred to as H4, and the minimum horizontal length is referred to as H4 ', and the address electrode direction (as shown in FIG. If the maximum vertical length of the discharge cells 6R, 6G, 6B along the Y direction) is V4 and the minimum vertical length is V4 ', the pure discharge cells 6R, 6G, 6B except for the non-discharge regions 26, 12 ) Area S4 can be defined by the following equation.

( )

At this time, in the PDP according to the present embodiment, the area s of the protruding electrodes 16b and 18b is next to the area S4 of the pure discharge cells 6R, 6G, and 6B except for the non-discharge regions 26 and 12. The condition of

In the above Equation 4, when the s / S3 ratio is less than 0.37 and the s / S4 ratio is less than 0.55 in Equation 6, driving of the PDP becomes difficult due to excessive increase in discharge voltage, and the luminance decreases strongly, thereby degrading PDP efficiency. . In the condition that the s / S3 ratio exceeds 0.51 in Equation 4 and the s / S4 ratio exceeds 0.95 in Equation 6, the resistance values of the protruding electrodes 16b and 18b are excessively increased, and scanning is performed in the electrode manufacturing process. There is a disadvantage that it is difficult to maintain an appropriate gap between the electrode 16 and the display electrode 18.

Therefore, since the PDP according to the present embodiment includes the discharge sustaining electrode 20 that satisfies the conditions of the above-described equations (4) and (6), a sufficient aperture ratio is secured to increase the screen brightness and limit the discharge current to consume power. By lowering the PDP efficiency is increased.

Preferably, the protruding electrodes 16b and 18b of the above-described configuration are maintained in the same manner as in the above-described embodiment by maintaining the vertical length b in the address electrode direction and changing the horizontal length a in the discharge sustaining electrode direction. While maintaining the discharge gap G between the scan electrode 16 and the display electrode 18, the area is adjusted so as to satisfy the above-described equations (4) and (6).

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 range of.

Thus, according to the present invention, by optimizing the area occupied by the discharge holding electrode, especially the protruding electrode in the discharge cell, it is possible to maintain the proper discharge voltage to smoothly drive the PDP, to secure a sufficient aperture ratio, to increase the screen brightness, and to discharge the current. By limiting the power consumption, the PDP efficiency is increased.

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

FIG. 2 is a partial plan view illustrating the assembled state of FIG. 1. FIG.

3 is a partially enlarged view of FIG. 2.

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

FIG. 5 is a partial plan view illustrating the assembled state of FIG. 4. FIG.

6 is a partial cross-sectional view showing the assembled state of FIG. 4.

7 is a partially enlarged view of FIG. 5.

8 is a partially exploded perspective view of an AC plasma display panel according to the prior art.

Claims (13)

First and second substrates disposed to face each other at arbitrary intervals; Address electrodes formed on an opposite surface of the first substrate to a second substrate; A partition wall disposed in a space between the first substrate and the second substrate to partition discharge cells and to form a non-discharge area between the discharge cells; A red, green, or blue fluorescent layer formed in each discharge cell; And A discharge holding electrode formed along a direction orthogonal to the address electrode on an opposite surface of the second substrate to the first substrate, The discharge sustaining electrode includes a bus electrode corresponding to each pair of discharge cells, and a protruding electrode extending from the bus electrode toward the center of each discharge cell so as to face each other. A plasma display panel satisfying the following conditions when an area of each discharge cell including the non-discharge area is S1 and an area occupied by the protruding electrode in each discharge cell is s. 0.3 ≤ s / S1 ≤ 0.8 The method of claim 1, And the barrier rib includes a first barrier member in a direction of the address electrode and a second barrier member in a direction of the discharge sustain electrode. The method of claim 1, And the protruding electrode is formed of a rectangular transparent electrode. The method of claim 1, The area of each discharge cell excluding the non-discharge area is S2, and the area occupied by the protruding electrode in each discharge cell is s, and the following condition is satisfied. 0.5 ≤ s / S2 ≤ 0.95 The method according to claim 1 or 4, The protruding electrode has a length corresponding to the discharge sustaining electrode direction while maintaining the same discharge gap (G) between a pair of protruding electrodes, the area of which is controlled. First and second substrates disposed to face each other at arbitrary intervals; Address electrodes formed on an opposite surface of the first substrate to a second substrate; A partition wall disposed in a space between the first substrate and the second substrate to partition discharge cells and non-discharge regions; A red, green, or blue fluorescent layer formed in each discharge cell; And A discharge holding electrode formed along a direction orthogonal to the address electrode on an opposite surface of the second substrate to the first substrate, The non-discharge area is disposed in an area surrounded by an imaginary horizontal axis and a vertical axis passing through the center of each discharge cell, The discharge holding electrode includes a bus electrode corresponding to each pair of discharge cells, and a protruding electrode extending from the bus electrode toward the center of each discharge cell so as to face each other. The area of each discharge cell including the non-discharge area and the partition wall is S3, and the area occupied by the protruding electrode in each discharge cell is s, and the following condition is satisfied. 0.37 ≤ s / S3 ≤ 0.51 The method of claim 6, And wherein the discharge cells are formed narrower as the widths of both ends located in the direction of the address electrodes move away from the center of the discharge cells. The method of claim 6, And the discharge cell is formed to be smaller as the depth measured from an upper end of the barrier rib at both ends positioned along the address electrode direction is farther from the center of the discharge cell. The method of claim 6, And the non-discharge area is formed such that the center thereof coincides with the center of the area surrounded by the horizontal axis and the vertical axis. The method of claim 6, And a first partition member in a direction parallel to the address electrode, and a second partition member formed to cross the first partition member at a predetermined inclination angle without being parallel to the address electrode. The method of claim 6, And the protruding electrode has a shape in which a rear end portion of the protruding electrode is gradually narrowed toward the bus electrode. The method of claim 6, The area of each discharge cell excluding the non-discharge area and the partition wall is S4, and the area occupied by the protruding electrode in each discharge cell is s, wherein the following conditions are satisfied. 0.55 ≤ s / S4 ≤ 0.95 The method of claim 6 or 12, The protruding electrode has a length corresponding to the discharge sustaining electrode direction while maintaining the same discharge gap (G) between a pair of protruding electrodes, the area of which is controlled.