KR100603283B1 - Plasma display panel - Google Patents

Abstract

According to the present invention, a plasma display panel is disclosed. The plasma display panel includes a front substrate; A rear substrate disposed to face the front substrate; A plurality of first electrodes extending transversely on the inner surface of the front substrate; A plurality of second electrodes extending at a predetermined angle with respect to the first electrode on the inner surface of the rear substrate; First and second dielectric layers formed on inner surfaces of the front substrate and the rear substrate to respectively embed the first and second electrodes; A protective film layer formed under the first dielectric layer; The discharge space is divided into a plurality of discharge cells, and the vertical partition wall disposed between the second electrodes, and disposed between the first electrodes to be orthogonal to the vertical partition wall and gradually downward toward the center of the discharge cell toward the lower portion thereof. And a rectangular partition including a horizontal partition having a protrusion formed to protrude. According to the disclosed plasma display panel, erroneous discharge due to discharge interference between discharge cells does not occur, and the luminous efficiency of the phosphor is improved.

Description

Plasma display panel {Plasma display panel}

1 is an exploded perspective view schematically showing a typical plasma display panel;

2 is an exploded perspective view schematically showing a plasma display panel having a rectangular partition wall;

3 is a plan view of the plasma display panel shown in FIG.

4A and 4B are cross-sectional views taken along the line IV-IV of FIG. 3, showing an embodiment of a transverse bulkhead according to the present invention.

<Brief description of symbols for the main parts of the drawings>

100 Plasma Display Panel 111 Front Panel

112 back substrate 121 transparent electrode

122 Bus electrode 130 First dielectric layer

140 protective layer 150 address electrode

160 ... the second dielectric layer 171 ... the vertical bulkhead

172 Horizontal bulkhead 172a Projection

180 ... phosphor

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 partition wall in order to improve luminous efficiency of a phosphor.

In general, a plasma display panel (PDP) injects a discharge gas into a cell space formed on an inner surface of a substrate bonded to each other, and emits red, green, and blue phosphors. Is applied to a predetermined position on the substrate, and then a high voltage current is applied to the inner surface of the substrate on which the electrodes are formed in a predetermined pattern so that the glow discharge occurs, and by the ultraviolet rays generated while the discharged gas emits light during the glow discharge. It is a device that displays an image by emitting a phosphor.

An example of such a general plasma display panel is shown in FIG. 1.

Referring to the drawings, a general plasma display panel 10 includes a front substrate 11 and a rear substrate 12 disposed to face the front substrate 11.

On the lower surface of the front substrate 11, a plurality of transparent electrodes 21 including strip and common electrodes 21a and 21b are alternately formed, and the common and scan electrodes 21a and 21b are formed. In order to reduce the line resistance of the electrodes 21a and 21b along one edge of the lower surface, a bus electrode 22 made of a metal material formed by narrowing the width of the electrodes 21a and 21b is formed.

In order to fill the transparent electrodes 21 and the bus electrode 22, a first dielectric layer 30 is coated on a lower surface of the front substrate 11, and a lower surface of the first dielectric layer 30 is protected. In order to do this, a protective film layer 40 made of magnesium oxide (MgO) is formed.

On the other hand, a plurality of address electrodes 50 in the form orthogonal to the transparent electrode 21 are formed on the upper surface of the rear substrate 12 provided to face the front substrate 11. The address electrode 50 is buried by the second dielectric layer 60.

The partition wall 70 is formed on the upper surface of the second dielectric layer 60 to be spaced apart by a predetermined interval. The discharge space partitioned by the partition wall 70 is filled with a gas mainly composed of xenon (Xe). Red, green, and blue phosphor layers 80 are coated inside the partition wall 70.

In the general plasma display panel 10 having the partition wall 70 having the above-described shape, the phosphor 80 is applied only to both sides of the partition wall 70, thereby lowering the luminous efficiency of the phosphor.

In addition, a problem of erroneous discharge due to discharge interference between discharge cells adjacent in the vertical direction has occurred.

The present invention is to solve the above problems, to improve the luminous efficiency of the phosphor by increasing the amount of the phosphor excited by the ultraviolet light, to prevent the discharge interference between the discharge cells to prevent the structure of the partition wall It is an object of the present invention to provide an improved plasma display panel.

In order to achieve the above object, the plasma display panel includes a front substrate; A rear substrate disposed to face the front substrate; A plurality of first electrodes extending in a horizontal direction on an inner surface of the front substrate; A plurality of second electrodes extending on the inner surface of the rear substrate at an angle with respect to the first electrode; First and second dielectric layers formed on inner surfaces of the front substrate and the rear substrate to respectively fill the first and second electrodes; A protective film layer formed under the first dielectric layer; The discharge space is divided into a plurality of discharge cells, and the vertical bulkhead disposed between the second electrodes and the first electrodes disposed to be orthogonal to the vertical bulkhead and toward the bottom thereof have a center of the discharge cell. And a square partition wall including a horizontal partition wall having a protrusion formed to gradually protrude toward.

Here, it is preferable that the distance from the discharge center to the phosphor formed in the vertical partition wall and the distance from the discharge center to the phosphor formed in the horizontal partition wall be substantially the same.

In addition, the derivation portion may be formed in a plurality of steps.

In addition, the vertical bulkhead is preferably formed to protrude gradually toward the center of the discharge cell toward the lower portion.

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

2 is a schematic exploded perspective view of a plasma display panel having a rectangular partition wall, and FIG. 3 is a plan view of the plasma display panel illustrated in FIG. 2.

As shown, the plasma display panel according to an exemplary embodiment of the present invention includes a front substrate 111 and a rear substrate 112 disposed to face each other at a predetermined distance from the front substrate 111 to form a discharge space. Equipped.

The lower surface of the front substrate 111 is formed with a plurality of transparent electrodes 121 formed of a pair of common electrodes 121a and scan electrodes 121b extending in the horizontal direction and alternately arranged. The bus electrode 122 is formed along one edge of the common electrode 121a and the scan electrode 121b. However, the transparent electrode 121 and the bus electrode 122 formed on the bottom surface of the front substrate 111 are exemplary and are not intended to limit the scope of the present invention.

In addition, a first dielectric layer 130 filling the plurality of transparent electrodes 121 is formed on the bottom surface of the front substrate 111, and a first dielectric layer 130 is formed on the bottom surface of the first dielectric layer 130. In order to protect, a protective film layer 140 made of magnesium oxide is formed.

On the other hand, a plurality of address electrodes 150 extending in the vertical direction are formed on the top surface of the back substrate 112. The plurality of address electrodes 150 are filled with a second dielectric layer 160 formed on an upper surface of the back substrate 112. Here, however, the address electrode 150 formed on the upper surface of the rear substrate 112 is merely an example, and is not intended to limit the scope of the present invention.

A rectangular partition wall is formed on the upper surface of the second dielectric layer 160 to define the discharge space into a plurality of discharge cells (C). The rectangular partition wall includes a plurality of vertical partition walls 171 disposed between the address electrodes 150, and a plurality of horizontal partition walls 172 disposed between the transparent electrodes 121 so as to be orthogonal to the vertical partition walls 171. ).

 Red, green, and blue phosphors 180 are coated on the inner surfaces of the vertical partition wall 171 and the vertical partition wall 172 and the upper surface of the second dielectric layer 160.

4A to 4B are cross-sectional views taken along the line IV-IV of FIG. 3, showing an embodiment of a transverse bulkhead according to the present invention.

As shown, the horizontal partition wall 172 includes a protrusion 172a formed to protrude gradually toward the center of the discharge cell toward the lower portion thereof. Here, the distance from the discharge center to the phosphor 180 formed in the vertical partition wall 171 and the distance from the discharge center to the phosphor 180 formed in the horizontal partition wall 172 are preferably substantially the same. In addition, as shown in FIG. 4B, the derivation unit 172a may be formed in a plurality of staircase shapes.

Although not shown, the vertical partition wall 171 may also be formed to protrude gradually toward the center of the discharge cell toward the lower portion thereof.

According to the embodiment of the present invention configured as described above, not only the phosphor 180 coated on the vertical partition wall 171, but also the phosphor 180 coated on the horizontal partition wall 172 can be excited by ultraviolet light, so that luminous efficiency This is improved, and the horizontal partition wall 172 prevents the discharge interference between the upper and lower discharge cells (C) so that no erroneous discharge occurs.

In particular, by providing the protrusion 172a which is formed to gradually protrude toward the center of the discharge cell in the horizontal partition wall 172, the phosphor 180 coated on the horizontal partition wall 172 is moved to the center of the discharge space. The amount of ultraviolet light that reaches the phosphor 180 applied to the horizontal partition wall 172 is increased. Therefore, since the amount of phosphors excited by ultraviolet rays in the unit discharge cells C is increased, the luminous efficiency of the phosphors is improved.

As described above, according to the plasma display panel according to the present invention, since the amount of phosphor excited by ultraviolet rays is increased, the luminous efficiency of the phosphor is improved. In addition, the discharge barrier between the upper and lower discharge cells is prevented by the horizontal partition wall, so that no erroneous discharge occurs.

Although the present invention has been described with reference to the embodiments illustrated in the accompanying drawings, it is merely an example, and those skilled in the art may realize various modifications and equivalent other embodiments therefrom. I will understand. Therefore, the true scope of protection of the present invention should be defined by the technical spirit of the appended claims.

Claims (4)

A front substrate; A rear substrate disposed to face the front substrate; A plurality of first electrodes extending in a horizontal direction on an inner surface of the front substrate; A plurality of second electrodes extending on the inner surface of the rear substrate at an angle with respect to the first electrode; First and second dielectric layers formed on inner surfaces of the front substrate and the rear substrate to respectively fill the first and second electrodes; A protective film layer formed under the first dielectric layer; The discharge space is divided into a plurality of discharge cells, and the vertical bulkhead disposed between the second electrodes and the first electrodes disposed to be orthogonal to the vertical bulkhead and toward the bottom thereof have a center of the discharge cell. And a square partition wall including a horizontal partition wall having a protrusion formed to gradually protrude toward the plasma display panel. The method of claim 1, And the distance from the center of the discharge cell to the phosphor formed in the vertical partition wall and the distance from the center of the discharge cell to the phosphor formed in the horizontal partition wall are substantially the same. The method of claim 1, The derivation unit is a plasma display panel, characterized in that formed in a plurality of steps. The method of claim 1, And the vertical partition wall is formed so as to protrude gradually toward the center of the discharge cell.

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