KR20070056788A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to prevent distortion of images by increasing gradually a size of a discharge cell from a center to an edge of a panel according to a viewing angle. A rear substrate is disposed opposite to a front substrate. A plurality of discharge electrodes(212,213) are arranged between the front substrate and the rear substrate. A discharge voltage is applied to the discharge electrodes. A plurality of barrier ribs(264) are arranged between the front substrate and the rear substrate in order to define discharge cells. Red, green and blue phosphor layers are formed within the discharge cells. The size of the discharge cell increases gradually from a center to an edge of a panel. The area of the discharge electrode is expanded gradually from the center to an edge of the panel.

Description

Plasma display panel {Plasma display panel}

1 is a graph showing the luminance of a conventional flat panel display;

2 is an exploded perspective view of a plasma display panel partially cut out according to an embodiment of the present invention;

3 is a plan view partially illustrating the plasma display panel of FIG. 2;

4 is a configuration diagram showing a viewing angle of a conventional panel;

5 is a graph showing luminance according to a viewing angle of a conventional panel.

<Description of Symbols for Major Parts of Drawings>

200 ... plasma display panel 210 ... front panel

211 ... Front substrate 212 ... X electrode

212a ... First transparent electrode 213 ... Y electrode

213a ... second transparent electrode 214 ... front dielectric layer

215 ... Protective layer 260 ... Back panel

261 Back panel 262 Address electrode

263 back dielectric layer 264 bulkhead

270 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 having an improved structure of a discharge cell so as to realize high image quality.

In general, flat display devices are classified into light-emitting and light-receiving types. The light emitting type includes a flat cathode ray tube, a plasma display panel, an electro luminescent display, a fluorescent fluorescent display, and a light emitting diode. . The light receiving type is a liquid crystal display.

Among them, the plasma display panel injects and discharges a discharge gas into a plurality of substrates, and then, when a gas discharge is generated by a direct current or an alternating voltage applied to the plurality of discharge electrodes, the phosphor layer is formed by ultraviolet rays generated in the discharge process. This refers to a display device that is excited to emit visible light to implement desired numbers, letters, or graphics.

Such a plasma display panel can be classified into a direct current type and an alternating current type according to a type of driving voltage applied to a discharge cell, for example, a discharge type, and can be classified into a counter discharge type and a surface discharge type according to the configuration of the electrodes.

The direct current plasma display panel is a structure in which all electrodes are exposed to the discharge space, and charge is directly transferred between the corresponding electrodes. On the other hand, in the AC plasma display panel, at least one electrode is embedded in the dielectric layer, and instead of direct charge transfer between the corresponding electrodes, the ions and electrons generated by the discharge adhere to the surface of the dielectric layer to form a wall. It is possible to form a wall voltage and to maintain discharge by a sustaining voltage.

In the opposite discharge type plasma display panel, an address electrode and a scan electrode are provided to face each pixel, and addressing discharge and sustain discharge are generated between the two electrodes. On the other hand, in the surface discharge plasma display panel, an address electrode and a sustain discharge electrode pair corresponding thereto are provided for each unit pixel to generate addressing discharge and sustain discharge.

In general, a three-electrode surface discharge plasma display panel which is widely used includes a front substrate, a rear substrate disposed opposite thereto, an X electrode and a Y electrode which are sustain discharge electrode pairs formed on an inner surface of the front substrate, and a sustain discharge electrode pair. A front dielectric layer to fill the gap, a protective film layer coated on the surface of the front dielectric layer, an address electrode formed on the top surface of the rear substrate and disposed in a direction crossing the sustain discharge electrode pair, a back dielectric layer to embed the address electrode; It includes a partition wall provided between the front and rear substrates, and a phosphor layer of red, green, and blue formed in the discharge cell. On the other hand, a discharge region is formed by injecting a discharge gas into the combined internal space of the front and rear substrates.

The plasma display panel having the above structure selects a discharge cell by applying an electrical signal to the Y electrode and the address electrode, and then alternately applies an electrical signal to the X and Y electrodes to generate surface discharge from the surface of the front substrate to generate ultraviolet rays. As a result, visible light is emitted from the phosphor layer of the selected discharge cell, thereby realizing a still image or a moving image.

Recently, researches for improving the discharge efficiency of the plasma display panel, in particular, the brightness, are in progress.

1 is a graph illustrating a change in luminance according to a viewing angle of a conventional display device.

Here, the X axis shows the viewing angle, and the Y axis shows the luminance.

Referring to FIG. 1, the curve A of the plasma display panel initially has a small change in luminance, and the luminance rapidly decreases as the viewing angle increases. That is, as the viewing angle increases from 0 °, 10 °, 20 °, 30 °, and 40 °, the luminance (contrast ratio) shows 1.0, 0.98, 0.95, 0.93, 0.88, and 50 °, 60 °. , 70 °, 80 ° increases to 0.75, 0.68, 0.51, 0.17.

On the other hand, when the curve A of the plasma display panel is compared with the curve B in the horizontal direction and the curve C in the vertical direction, it can be seen that the luminance is relatively excellent. This is because the plasma display panel is a self-luminous type, whereas the liquid crystal display is a light receiving type flat panel display device.

However, as the panel 200 increases in size, the size of the pixel according to the viewing angle may vary or the luminance may vary. As a result, distortion of the image occurs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a plasma display panel having improved luminance characteristics by changing the size of a pixel according to a viewing angle over the entire panel area.

In order to achieve the above object, the plasma display panel according to an aspect of the present invention,

With the front board,

A rear substrate disposed to face the front substrate;

A plurality of discharge electrodes disposed between the front substrate and the rear substrate and to which a discharge voltage is applied;

A partition wall disposed between the front substrate and the rear substrate to partition a discharge cell;

A red, green, and blue phosphor layer formed in the discharge cell,

The size of the discharge cell is increased from the center of the panel toward the edge, and the area of the discharge electrode is enlarged from the center of the panel toward the edge to correspond to the change of the discharge cell.

In addition, the size change of the discharge cell is characterized in that the interval of the adjacent pair of partitions partitioning it is made wider from the center of the panel toward the edge.

Further, the phosphor layer is characterized in that it is applied relatively wide toward the edge from the center of the panel.

The discharge electrode may include a sustain discharge electrode pair disposed on an inner surface of the front substrate along one direction of the panel, and an address electrode disposed on an inner surface of the rear substrate in a direction crossing the sustain discharge electrode pair. The electrode pair includes an area enlarged from the center to the edge of the panel.

In addition, the discharge electrode includes a transparent conductive film disposed in the discharge cell and a bus electrode electrically connected to the transparent conductive film, wherein the transparent conductive film is enlarged in area from the center to the edge of the panel.

Further, the partition wall is characterized by satisfying the following equation (1).

<Equation 1>

P ₁ = P ₀ / COS (θ)

Here, P ₁ is the interval between partitions after correction, P ₀ is the interval between partitions as a reference before correction, and COS (θ) is the viewing angle.

In addition, the discharge electrode is characterized by satisfying the following equation (2).

<Equation 2>

I ₁ = I ₀ × {COS (θ) / Y}

Here, I ₁ is the width of the discharge electrode after the correction, I ₀ is the width of the discharge electrode as the reference before correction, COS (θ) is the viewing angle, Y is the correction factor.

In addition, the correction factor is characterized by satisfying the following equation (3).

<Equation 3>

Y = (A) + (B ₁ × θ) + (B ₂ × θ ² ) + (B ₃ × θ ³ ) + (B ₄ × θ ⁴ )

Where A, B ₁ , B ₂ , B ₃ and B ₄ are constants and θ is the viewing angle.

Plasma display panel according to another aspect of the present invention,

With the front board,

A sustain discharge electrode pair disposed on an inner surface of the front substrate and including an X electrode to which a sustain discharge voltage is applied, and a Y electrode disposed alternately;

A rear substrate disposed to face the front substrate;

An address electrode disposed on an inner surface of the rear substrate, an addressing discharge voltage applied thereto, and an address electrode disposed along a direction crossing the sustain discharge electrode pair;

A partition wall disposed between the front substrate and the rear substrate to partition a discharge cell;

A red, green, and blue phosphor layer formed in the discharge cell,

An interval of the partition wall may satisfy the following Equation 4.

<Equation 4>

P ₁ = P ₀ / COS (θ)

Here, P ₁ is the interval between partitions after correction, P ₀ is the interval between partitions as a reference before correction, and COS (θ) is the viewing angle.

The sustain discharge electrode pair may include a transparent conductive film disposed in a discharge cell for each of the X electrode and the Y electrode, and a bus electrode electrically connected to the transparent conductive film, wherein the width of the transparent conductive film satisfies Equation 5 below. Characterized in that.

<Equation 5>

I ₁ = I ₀ × {COS (θ) / Y}

Here, I ₁ is the width of the transparent conductive film after correction, I ₀ is the width of the transparent conductive film to be the reference before correction, COS (θ) is the viewing angle, and Y is the correction factor.

Moreover, the correction factor includes satisfying the following equation (6).

<Equation 6>

Y = (A) + (B ₁ × θ) + (B ₂ × θ ² ) + (B ₃ × θ ³ ) + (B ₄ × θ ⁴ )

Where A, B ₁ , B ₂ , B ₃ and B ₄ are constants and θ is the viewing angle.

Hereinafter, a plasma display panel according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 illustrates a partial cutting of the plasma display panel 200 according to an exemplary embodiment of the present invention.

Referring to the drawings, the plasma display panel 200 includes a front panel 210 and a rear panel 260 disposed to face the front panel 210, and the front and rear panels 210 and 260. Frit glass is applied to the edges of the opposing faces of the c) to provide a closed interior space.

The front panel 210 is provided with a front substrate 211 such as soda lime glass. On the inner surface of the front substrate 211, an X electrode 212 and a Y electrode 213 are disposed along the X direction of the panel 200. The X electrode 212 and the Y electrode 213 are alternately arranged along the Y direction of the panel 200.

The X electrode 212 may include a first transparent electrode 212a formed on an inner surface of the front substrate 211 and a first bus electrode 212b overlapping one edge of the first transparent electrode 212a. It is included. The first transparent electrode 212a is disposed for each discharge cell and is rectangular, but is not limited thereto.

The Y electrode 213 is substantially the same shape as the X electrode 212, along the second transparent electrode 213a formed on the inner surface of the front substrate 211 and along one edge of the second transparent electrode 213a. An overlapping second bus electrode 213b is included. The second transparent electrode 213a is disposed for each discharge cell and is rectangular, but is not limited thereto. The second transparent electrode 213a is disposed to be spaced apart from the first transparent electrode 212a by a predetermined interval to form a discharge gap therebetween.

The first and second transparent electrodes 212a and 213a are made of a transparent conductive film, for example, an indium tin oxide film, to improve the opening ratio of the front substrate 211. The first and second bus electrodes 212b and 213b may be formed of a metal material having excellent conductivity, such as silver, to reduce the line resistance of the first and second transparent electrodes 212a and 213a and to improve their electrical conductivity. It consists of multiple layers of paste (Ag paste) or chromium-copper-chromium alloy.

In this case, the space between the pair of X and Y electrodes 212 and 213 and the pair of X and Y electrodes 212 and 213 adjacent to each other corresponds to a non-discharge area. In the non-discharge region, a black stripe layer may be further formed to improve contrast.

The X electrode 212 and the Y electrode 213 are embedded by the front dielectric layer 214. The front dielectric layer 214 is made of a highly dielectric material, for example, ZnO-B ₂ O ₃ -Bi ₂ O ₃ . The front dielectric layer 214 may be selectively printed only on a portion where the X electrode 212 and the Y electrode 213 are formed, or may be front printed over the entire surface of the front dielectric layer 214. have. A protective layer 215 such as magnesium oxide (MgO) is deposited on the surface of the front dielectric layer 214 to prevent its breakage and to increase secondary electron emission.

The back panel 261 is provided on the back panel 260, and the back substrate 261 is made of substantially the same material as the front substrate 211. The address electrode 262 is disposed on the back substrate 261. The address electrode 262 is disposed in a direction crossing the X electrode 212 and the Y electrode 213. The address electrode 262 is embedded by the back dielectric layer 263. The back dielectric layer 263 is made of a highly dielectric material, such as PbO-B ₂ O ₃ -SiO ₂ .

On the other hand, a partition 264 is formed between the front panel 210 and the rear panel 260 to partition the discharge space together. The partition wall 264 includes a first partition wall 264a disposed in a direction crossing the address electrode 262, and a second partition wall 264b disposed in a direction parallel to the address electrode 262. The first partition wall 264a extends from the inner wall of the pair of second partition walls 264b adjacent from the inner wall to form a matrix discharge space.

Alternatively, the partition wall 264 may have a meander type, a stripe type, a honeycomb type, a delta type, or a waffle type in addition to the matrix type. Various types of embodiments exist, and thus, the divided discharge cells are not limited to any one of polygonal, circular, and elliptical cross sections in addition to quadrangles.

In the discharge cell partitioned by the front panel 210, the back panel 260, and the partition wall 264, Ne-xenon (Xe), helium (He) -xenon (Xe), etc. Discharge gas is injected.

In the discharge cell, red, green, and blue phosphor layers 270 which are excited by ultraviolet rays generated from the discharge gas and emit visible light are formed. The red, green, and blue phosphor layers 270 may be applied to any area of the discharge cell. However, the red, green, and blue phosphor layers 270 may be applied to the inside of the partition wall 264 in this embodiment. At this time, the red phosphor layer is made of (Y, Gd) BO ₃ ; Eu ⁺³ , the green phosphor layer is made of Zn ₂ SiO ₄ : Mn ²⁺ , and the blue phosphor layer is BaMgAl ₁₀ O ₁₇ : Eu It is preferable that it ^consists of ²⁺ .

Here, the first, second, ..., n-1, n-th discharge cells are widened by a specific value as the interval from the center to the edge of the panel, the area of the discharge electrode and the change of the discharge cell It is enlarged from the center of the panel toward the edge so as to correspond.

In more detail, as shown in FIG.

3 illustrates the overall size of the plasma display panel 200 of FIG. 2.

Referring to the drawings, the panel 200 includes a display area (DA) in which a plurality of discharge electrodes 212, 213, 262 are disposed to implement an image when a predetermined discharge voltage is applied, and A non-display area, which is divided from the boundary of the display area DA to the edge of the panel 200, in which the plurality of discharge electrodes 212, 213, 262 are electrically connected to an external terminal, such as a flexible printed cable ( NDA (non-display area) can be partitioned.

In the display area DA, an X electrode 212 and a Y electrode 213 are disposed along the X direction of the panel 200, and the Y direction of the panel 200, that is, the X electrode 212, The address electrode 262 is disposed along the direction crossing the Y electrode 213.

The X electrode 212, the Y electrode 213, and the address electrode 262 are arranged in pairs in a discharge space partitioned by the partition wall 264. In this case, the partition wall 264 includes a first partition wall 264a disposed in a direction orthogonal to the address electrode 262, and a second partition wall 264b disposed in a direction parallel to the address electrode 262. have.

The X electrode 212 includes a first transparent electrode 212a and a first bus electrode 212b electrically connected to the first transparent electrode 212a. The Y electrode 213 includes a second transparent electrode 213a and a second bus electrode 213b electrically connected to the second transparent electrode 213a. The X electrode 212 and the Y electrode 213 extend in opposite directions from the display area DA to the non-display area NDA across adjacent discharge cells disposed along the X direction of the panel 200. It is.

The X electrode 212, the Y electrode 213, and the address electrode 262 are disposed in the entire area of the panel 200, and are connected to the external terminals in the non-display area NDA. The electrodes are grouped into one, and a plurality of such groups are arranged so as to be connected to an external terminal.

At this time, the interval of the discharge cells is changed from the center of the panel 200 to the edge, the change of the discharge cells is possible by the change of the interval of the partition wall 264 partitioning them.

That is, the spacing D1 of the pair of adjacent partitions 264 arranged at the center of the panel 200 is formed to be relatively narrower than the spacing D2 of the partitions 264 arranged at the edge of the panel 200. . In addition, the space | interval of the partition 264 becomes wider according to the change of a viewing angle toward the edge from the center side of the panel 200. As shown to FIG.

Accordingly, the red, green, and blue phosphor layers 270 formed in the discharge cells have a coating amount of the phosphor layer 270 formed at the center of the panel 200 according to a change in the distance between the pair of adjacent partition walls 264. The amount of the phosphor layer 270 formed on the edge of the side 200 becomes relatively greater.

On the other hand, the X electrode 212 and the Y electrode 213 corresponds to the size of the discharge cell in accordance with the change in the interval of the partition 264, the area is enlarged toward the edge from the center of the panel 200. In addition, the address electrode 262 is equally applicable.

In particular, the first transparent electrode 212b of the X electrode 212 disposed in the discharge cell or the second transparent electrode 213b of the Y electrode 213 may be disposed within the discharge cell disposed at the center of the panel 200. The width W2 in the discharge cell disposed on the edge side of the width W1 is relatively wider.

In this case, the change in the spacing of the partition 264 depends on a specific equation according to the change in the viewing angle.

4 illustrates a viewing angle with respect to the plasma display panel 200.

In addition, when the user 450 views the front of the plasma display panel 200, the pixel 201 of the panel 200 viewed in the front vertical direction has a length of “L1”. In addition, the rightmost pixel 202 of the panel 200 has a length of “L2”. The length of "L2" is substantially the same as the length of "L1".

In this case, it can be seen that the length of the center pixel 201 and the edge pixel 202 having the same length varies depending on the viewing angle. That is, when "L1" is regarded as the reference length, "L2" has a value of reference length x COS (θ). As such, although the lengths of "L1" and "L2" are substantially the same, the length that the user 350 directly sees will be "L1" and "L3".

Therefore, the interval of the discharge cells may be designed by adjusting the length of “L2” so that “L1” and “L3” have the same length according to the viewing angle. At this time, it is good to design so that L2 = L3 / COS ((theta)). Accordingly, the size of the pixel according to the viewing angle is compensated for, so that the size of the pixel according to the position of the panel 200 is the same. As such, when the spacing of the discharge cells is designed as L2 = L3 / COS (θ), the brightness of the unit pixel is also shown as the conventional brightness / COS (θ).

In addition, the size of the pixel according to the viewing angle should be adjusted as described above, but the luminance of the unit pixel should also be corrected.

5 shows a regression curve according to the viewing angle in the discharge cell.

Here, the X axis represents the viewing angle and the Y axis represents the luminance.

Referring to the drawings, the luminance is close to approximately 1.0 at a viewing angle of 0 °, whereas the luminance decreases while drawing a parabolic curve as the angle increases from side to side. At this time, the correction value of the luminance according to the viewing angle is as shown in Equation 3 to be described later.

In this way, the change due to the size of the discharge cell and the correction for the luminance difference according to the viewing angle are summarized as follows.

<Equation 1>

P1 = Pref / COS (θ)

Here, P1 is an interval between partition walls after correction, Pref is an interval between partition walls which become a reference value before correction, and COS (θ) denotes a viewing angle. In this case, the interval between the partition walls 264 refers to the interval between discharge cells, and more specifically, the interval between unit pixels.

In addition, the width of the discharge electrode according to the change in the distance between the partition walls 264 satisfies the expression (2).

<Equation 2>

I1 = Iref × {COS (θ) / Y}

Here, I1 is the width of the discharge electrode after correction, Iref is the width of the discharge electrode as a reference before correction, COS (θ) is the viewing angle, and Y is the correction factor. In this case, the discharge electrode may be referred to as the width of the first transparent electrode 212a of the X electrode 212 and the second transparent electrode 213a of the Y electrode 213 disposed on the front substrate 211.

In this case, Y is a correction factor and is a value for correcting the luminance value according to the viewing angle in order to equally adjust the luminance of the center side and the edge side of the panel 200. This value satisfies the polynomial (3) using the regression curve shown in FIG.

<Equation 3>

Y = (A) + (B1 × θ) + (B2 × θ ² ) + (B3 × θ ³ ) + (B4 × θ ⁴ )

Here, A, B1, B2, B3, and B4 are constants, and θ is a viewing angle. At this time, the A value is 0.9897, the B1 value is -4.21523 x 10 ^-9 , B2 is -6.70905 x 10 ^-5 , B3 is 9.51826 x 10 ^-12 , and B4 is -3.853 x 10-9.

The operation of the plasma display panel 200 having the above structure will be described with reference to FIGS. 1 and 2 as follows.

First, when a predetermined pulse voltage is applied between the address electrode 262 and the Y electrode 213 from an external power source, the discharge cell to emit light is selected. Wall charges are accumulated on the inner surface of the selected discharge cell.

Subsequently, when the sustain discharge voltage is applied to the X electrode 212 and the Y electrode 213, the wall charge is moved by the voltage difference applied between the X and Y electrodes 212 and 213. The movement of the wall charges causes a discharge by colliding with the discharge gas atoms in the discharge cell, thereby generating a plasma, which discharges the first and second transparent electrodes of the X and Y electrodes 312 and 313 in which a relatively strong electric field is formed. It starts out from the discharge gap between the electrodes 212a and 213a and extends outward.

In this manner, after the discharge is formed, if the voltage difference between the X and Y electrodes 212 and 213 becomes lower than the discharge voltage, the discharge no longer occurs, and space charge and wall charge are formed in the discharge cell.

At this time, if the polarities of the voltages applied to the X and Y electrodes 212 and 213 are changed to each other, the discharge is generated again with the help of the wall charge. If the polarities of the X and Y electrodes 212 and 213 are changed immediately, the initial discharge process is repeated. The discharge is stably generated while repeating this process.

At this time, the ultraviolet rays generated by the discharge excite the fluorescent material of the phosphor layer 270 applied to each discharge cell. Through this process, visible light is obtained. The generated visible light is emitted to the discharge cells to implement a still image or a moving picture.

At this time, the distance between the partition walls 264 becomes wider from the center side of the panel 200 toward the edge, and the first and second transparent electrodes 212a and 213a of the X and Y electrodes 212 and 213 also correspond to this. Since it is designed to be as wide as possible, the distortion of the image according to the viewing angle can be lined up.

As described above, the plasma display panel of the present invention can obtain the following effects.

First, by increasing the size of the discharge cell in the range of a specific equation according to the viewing angle from the center to the edge of the panel, it is possible to prevent distortion of the image.

Second, the luminance can be corrected by increasing the width of the discharge electrode so as to correspond to the change of the discharge cell from the center to the edge of the panel.

Third, by changing the size of the discharge cells to prevent distortion of the image, the user can see a clear picture quality even on a large screen.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (16)

With the front board, A rear substrate disposed to face the front substrate; A plurality of discharge electrodes disposed between the front substrate and the rear substrate and to which a discharge voltage is applied; A partition wall disposed between the front substrate and the rear substrate to partition a discharge cell; A red, green, and blue phosphor layer formed in the discharge cell, And the size of the discharge cell increases from the center of the panel toward the edge, and the area of the discharge electrode is enlarged from the center of the panel toward the edge so as to correspond to the change of the discharge cell. The method of claim 1, And the change in size of the discharge cells is made by the distance between the adjacent pair of partition walls partitioning the discharge cells from the center to the edge of the discharge cell. The method of claim 2, And the phosphor layer is applied relatively wider from the center to the edge of the panel. The method of claim 1, The discharge electrode includes a sustain discharge electrode pair disposed on an inner surface of the front substrate along one direction of the panel, and an address electrode disposed on an inner surface of the rear substrate in a direction crossing the sustain discharge electrode pair. The area of the plasma display panel including the area is enlarged toward the edge from the center of the panel. The method of claim 1, The discharge electrode includes a transparent conductive film disposed in a discharge cell and a bus electrode electrically connected to the transparent conductive film, wherein the transparent conductive film has an enlarged area from the center of the panel toward the edge. . The method of claim 1, The barrier ribs satisfy the following Equation 1. <Equation 1> P ₁ = P ₀ / COS (θ) Here, P ₁ is the interval between partitions after correction, P ₀ is the interval between partitions as a reference before correction, and COS (θ) is the viewing angle. The method of claim 1, The discharge electrode satisfies the following equation (2). <Equation 2> I ₁ = I ₀ × {COS (θ) / Y} Here, I ₁ is the width of the discharge electrode after the correction, I ₀ is the width of the discharge electrode as the reference before correction, COS (θ) is the viewing angle, Y is the correction factor. The method of claim 7, wherein And the correction factor satisfies Equation 3 below. <Equation 3> Y = (A) + (B ₁ × θ) + (B ₂ × θ ² ) + (B ₃ × θ ³ ) + (B ₄ × θ ⁴ ) Where A, B ₁ , B ₂ , B ₃ and B ₄ are constants and θ is the viewing angle. With the front board, A sustain discharge electrode pair disposed on an inner surface of the front substrate and including an X electrode to which a sustain discharge voltage is applied, and a Y electrode disposed alternately; A rear substrate disposed to face the front substrate; An address electrode disposed on an inner surface of the rear substrate, an addressing discharge voltage applied thereto, and an address electrode disposed along a direction crossing the sustain discharge electrode pair; A partition wall disposed between the front substrate and the rear substrate to partition a discharge cell; A red, green, and blue phosphor layer formed in the discharge cell, The partition wall spacing satisfies the following equation (4). <Equation 4> P ₁ = P ₀ / COS (θ) Here, P ₁ is the interval between partitions after correction, P ₀ is the interval between partitions as a reference before correction, and COS (θ) is the viewing angle. The method of claim 9, The sustain discharge electrode pair includes a transparent conductive film disposed in a discharge cell for each of the X electrode and the Y electrode, and a bus electrode electrically connected to the transparent conductive film, wherein the width of the transparent conductive film satisfies Equation 5 below. Characterized in that the plasma display panel. <Equation 5> I ₁ = I ₀ × {COS (θ) / Y} Here, I ₁ is the width of the transparent conductive film after correction, I ₀ is the width of the transparent conductive film to be the reference before correction, COS (θ) is the viewing angle, and Y is the correction factor. The method of claim 10, And the correction factor satisfies Equation 6 below. <Equation 6> Y = (A) + (B ₁ × θ) + (B ₂ × θ ² ) + (B ₃ × θ ³ ) + (B ₄ × θ ⁴ ) Where A, B ₁ , B ₂ , B ₃ and B ₄ are constants and θ is the viewing angle. The method of claim 10, And the transparent conductive film has an enlarged area from the center to the edge of the panel. The method of claim 9, The partition wall includes a first partition wall disposed in a direction parallel to the sustain discharge electrode pair, and a second partition wall disposed in a direction orthogonal to the sustain discharge electrode pair. The method of claim 13, And the partition wall is disposed such that a distance between adjacent first partition walls is wider from the center of the discharge cell to the edge. The method of claim 9, Wherein the interval of the discharge cells is wider from the center of the panel toward the edges, and the area of the discharge electrodes is enlarged from the center of the panel toward the edges so as to correspond to the change of the discharge cells. The method of claim 9, And the phosphor layer is applied relatively wider from the center to the edge of the panel.

Images