KR20060105097A - Plasma display panel - Google Patents

Abstract

A plasma display panel is disclosed. The present invention includes a front substrate; a rear substrate disposed to face the substrate; a dielectric wall defining a discharge cell together with the front and rear substrates; and a first discharge corner portion of one side of the discharge cell embedded in the dielectric wall. A plurality of discharge electrode pairs each having a first discharge electrode branched to surround and a second discharge electrode branched to surround the second discharge corner portion of the other side of the discharge cell facing the first discharge corner portion; and a discharge cell A red, green, and blue phosphor layer coated therein, wherein a plurality of discharge parts branched from discharge electrode lines disposed along the circumference of the discharge cell are drawn out, and the plurality of discharge parts cover one side of the discharge cell. Thus, by being disposed oppositely, discharge is possible at a low discharge voltage.

Description

Plasma display panel {Plasma display panel}

1 is an exploded perspective view illustrating a conventional plasma display panel;

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

3 is a plan view illustrating a state in which the discharge electrode of FIG. 2 is disposed;

4 is an exploded perspective view illustrating the discharge electrode of FIG. 2;

5 is a cross-sectional view taken along the line I-I in a state in which the panel of FIG. 2 is coupled;

<Description of Symbols for Major Parts of Drawings>

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

220 back substrate 230 dielectric wall

231 ... first dielectric wall 232 ... second dielectric wall

240 ... X electrode 241 ... X electrode line

242 ... First discharge part 250 ... Y electrode

251 ... Y electrode line 252 ... second discharge part

260 ... protective layer 270 ... address electrode

280 Dielectric Layer 290 Bulkhead

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 stably discharged discharge electrodes are arranged along a circumference of a discharge cell.

In general, a plasma display panel discharges a discharge gas between two substrates on which a plurality of discharge electrodes are formed, and excites the fluorescent material of the phosphor layer by the ultraviolet rays generated thereby to implement desired numbers, letters, or graphics. A flat display device is referred to.

Referring to FIG. 1, the conventional three-electrode surface discharge plasma display panel 100 includes a front substrate 110, a rear substrate 120 disposed opposite to the front substrate 110, and an X disposed on an inner surface of the front substrate 110. A discharge sustaining electrode pair 130 including an electrode 131 and a Y electrode 132, a front dielectric layer 140 filling the discharge sustaining electrode pair 130, and a surface of the front dielectric layer 140. A passivation layer 150, an inner surface of the back substrate 120, and an address electrode 160 disposed in a direction crossing the discharge sustaining electrode pair 130, and filling the address electrode 1560. A rear dielectric layer 170, a partition wall 180 provided between the front substrate 110 and the rear substrate 120, and a red, green, and blue phosphor layer 190 coated inside the partition wall 180. Include.

The plasma display panel 100 having the above structure selects a discharge cell by applying an electrical signal to the Y electrode 132 and the address electrode 160, and alternately applies the electrical signal to the X and Y electrodes 131 and 132. The surface discharge is generated from the surface of the front substrate 110 by applying the UV light, and the visible light is emitted from the phosphor layer 190 of the selected discharge cell, thereby realizing a still image or a moving picture.

However, the conventional plasma display panel 100 has a structure in which discharge is initiated from the X and Y electrodes 131 and 132 so that discharge is spread to both edges, so that the space utilization of the entire discharge cell is low.

In addition, since the X and Y electrodes 131 and 132, the front dielectric layer 140, and the protective film layer 150 are formed on the inner surface of the front substrate 110, the transmittance of visible light is less than 60%. The brightness is reduced. Accordingly, there is a problem as a high efficiency flat panel display.

Further, when the panel 100 is driven for a long time, the X and Y electrodes 131 and 132 are disposed on the inner surface of the front substrate 110 so that the discharge is expanded to the phosphor layer 190 formed thereunder, so that the discharge The charged particles of the gas cause ion sputtering on the phosphor layer 190 by an electric field, causing permanent afterimages.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to provide a plasma display panel which is disposed to face the same surface along the circumference of the discharge cell to cause discharge to lower the discharge start voltage.

Plasma display panel according to an aspect of the present invention to achieve the above object,

Front substrate;

A rear substrate disposed to face the front substrate;

A dielectric wall disposed between the front and back substrates and defining a discharge cell together with the front and back substrates;

A first discharge electrode embedded in the dielectric wall and branched to surround a first discharge corner of one side of the discharge cell, and a branch to surround a second discharge corner of the other side of the discharge cell facing the first discharge corner; A plurality of discharge electrode pairs having a saturated second discharge electrode; And

And red, green, and blue phosphor layers coated in the discharge cells.

In addition, the first discharge electrode extends in a direction in which the first discharge electrode line is disposed along the discharge cells continuously formed along one direction of the substrate, and is drawn out of the first discharge electrode line and the second discharge electrode is disposed. And a first discharge part surrounding a first discharge corner part together with the first discharge electrode line.

The second discharge electrode may be drawn out of the second discharge electrode line and the second discharge electrode line extending in a direction parallel to the first discharge electrode line along one direction of the substrate facing the discharge cell therebetween. And a second discharge portion extending in the direction in which the first discharge electrode is disposed to surround the second discharge corner portion together with the second discharge electrode line.

In addition, the first discharge corner is at least one corner formed along one side of the discharge cell, the second discharge corner is at least one corner formed along the other side of the discharge cell,

The first discharge part may be drawn out from the inner wall of the first discharge electrode line so as to completely cover the first discharge corner part, and the second discharge part may be formed to cover the second discharge corner part, respectively. It is characterized by drawing out a plurality from the inner wall.

Further, the plurality of first discharge portions and the plurality of second discharge portions extend from each corner portion of the discharge cell and are disposed to face each other in a state where they are spaced apart at predetermined intervals along one direction of the dielectric wall.

In addition, the first discharge electrode is an X electrode, the second discharge electrode is a Y electrode causing a sustain discharge with the X electrode, the discharge cell in the direction crossing the first and second discharge electrodes, the Y electrode And an address electrode for causing an addressing discharge.

In addition, the dielectric wall includes a first dielectric wall disposed along one direction of the substrate, and a second dielectric wall extending in an opposite direction from the inside of the pair of first dielectric walls to define a discharge cell. It is done.

In addition, the first discharge electrode and the second discharge electrode is characterized in that disposed on the same plane in the dielectric wall.

In addition, a partition wall having a structure corresponding to the dielectric wall is further provided between the dielectric wall and the rear substrate, and the phosphor layer is coated inside the partition wall.

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 substrate 210 and a rear substrate 220 disposed to face the front substrate 210. The front substrate 210 and the rear substrate 220 are made of a transparent substrate such as soda lime glass.

Between the front and rear substrates 210 and 220, a dielectric wall 230 defining a discharge cell together with them is provided. The dielectric wall 230 is a material having high dielectric properties, and is formed by adding various fillers to glass paste.

The dielectric wall 230 includes a first dielectric wall 231 disposed in the X direction of the panel 200 and a second dielectric wall 232 disposed in the Y direction. The first dielectric wall 231 extends in a direction opposite from an inner side wall of the pair of adjacent second dielectric walls 232 and defines a discharge cell of a matrix type.

Alternatively, the dielectric wall 230 may have various types of embodiments, such as a meander type, a delta type, a honeycomb, and the like. The discharge cell defined by the present invention is not limited to any one structure as long as it has a structure capable of defining a discharge space such as polygonal, circular, or elliptical shape in addition to the lattice shape.

Inside the dielectric wall 230, a discharge electrode including a first discharge electrode 240 and a second discharge electrode 250 is disposed along the circumference of the discharge cell. The first discharge electrode 240 and the second discharge electrode 250 are disposed on the same plane and are electrically insulated.

Magnesium oxide (MgO) is formed on the inner surface of the dielectric wall 230 so that ions generated inside the front substrate 210 along the side of the discharge cell can emit secondary electrons by interaction with the surface. A protective film layer 260 made of a material is formed. The protective layer 260 is coated for each discharge cell.

The third discharge electrode 270 is disposed on the top surface of the rear substrate 220 in a direction crossing the first and second discharge electrodes 240 and 250. The third discharge electrode 270 is positioned across the discharge cells adjacent in the Y direction of the panel 200. The third discharge electrode 270 is buried by the back dielectric layer 280.

A partition 290 may be further provided between the dielectric wall 230 and the rear dielectric layer 280. Unlike the dielectric wall 230, the partition 290 is made of a low dielectric material. The partition wall 290 has a shape substantially the same as that of the dielectric wall 230.

The partition 290 includes a first partition 291 disposed in a direction parallel to the first dielectric wall 231, and a second partition 292 disposed in a direction parallel to the second dielectric wall 232. Doing. The first and second dielectric walls 291 and 292 are integrally coupled to each other to form a matrix.

When only the dielectric wall 230 is formed between the front and back substrates 210 and 220, a single layer wall has a structure defining a discharge cell, and the dielectric wall 230 and the partition wall 290 are different. Likewise, when formed between the front and back substrates 210 and 220, the structure defines a discharge cell that is a two-layered wall made of a material having different dielectric properties.

In such discharge cells, red, green, and blue phosphor layers 310 which are excited by ultraviolet rays generated from the discharge gas and emit visible light are formed. The phosphor layer 310 may be coated on any surface of the discharge cell, but in the present embodiment, the phosphor layer 310 is formed to a predetermined thickness on the inner wall of the barrier rib 290 and the upper surface of the rear substrate 220.

The red, green, and blue phosphor layers 310 are coated for respective discharge cells. The red phosphor layer consists of (Y, Gd) BO ₃ ; Eu ⁺³ , the green phosphor layer consists of Zn ₂ SiO ₄ : Mn ²⁺ , and the blue phosphor layer is BaMgAl ₁₀ O ₁₇ : Eu ²⁺ It is preferable that it consists of.

Further, in the discharge cells defined by the front and back substrates 210 and 220, the dielectric walls 230, and the partition walls 290, neon (Ne) -xenon (Xe) or helium (He) -xenon ( A discharge gas such as Xe) is injected.

On the other hand, the plasma display panel 200 is a structure in which only the first and second discharge electrodes 240 and 250 are disposed according to the surface discharge type, the counter discharge type, or the hybrid type, or the first to third types. The discharge electrodes 240, 250, and 270 may be arranged together, and the first to third discharge electrodes 240, 250 and 270 may be arranged as a single electrode or a plurality of electrodes, respectively. It could be.

In the present embodiment, the first and second discharge electrodes 240 and 250 are discharge sustaining electrode pairs for generating sustain discharge, and the first discharge electrode 240 corresponds to the X electrode which is a common electrode. The second discharge electrode 250 corresponds to a Y electrode which is a scanning electrode.

In addition, the third discharge electrode 270 is disposed in a direction crossing the first and second discharge electrodes 240 and 250 and corresponds to an address electrode causing addressing discharge with the second discharge electrode 250. do. The third discharge electrode 270 may be disposed in the dielectric wall 230 in which the first and second discharge electrodes 240 and 250 are embedded, in addition to the inner surface of the rear substrate 220.

Hereinafter, the first and second discharge electrodes 240 and 250 are referred to as X and Y electrodes, and the third discharge electrode 270 is referred to as an address electrode.

According to a feature of the present invention, the X electrode 240 is branched to surround the first discharge corner portion of one side of the discharge cell, the Y discharge electrode 250 of the other side of the discharge cell facing the first discharge corner portion It is branched so that a 2nd discharge corner part may be wrapped.

In more detail, it is as following.

3 illustrates a state in which the discharge electrode of FIG. 2 is disposed, FIG. 4 illustrates a separation of the discharge electrode of FIG. 2, and FIG. 5 shows an incision along line I-I in a state in which the panel of FIG. 2 is coupled. It is shown.

3 to 5, the dielectric wall 230 includes a first dielectric wall 231 disposed in the X direction and a second dielectric wall 232 disposed in the Y direction. The second dielectric walls 231 and 232 define a matrix type discharge cell 320 upon bonding. A passivation layer 260 is deposited on the inner surface of the dielectric wall 230 to increase secondary electron emission.

The X electrode 240 is disposed along the discharge cells 320 disposed adjacent to the Y direction of the panel 200 and includes an X electrode line 241 embedded in the second dielectric wall 232. The X electrode line 241 has a strip shape. One X electrode line 241 is disposed for each second dielectric wall 232.

A plurality of first discharge parts 242 and 243 are connected to the X electrode line 241 toward the Y electrode 250. The plurality of first discharge parts 242 and 243 extend from the inner wall of the X electrode line 241 and surround the first discharge corner parts 321 and 322 together with the X electrode line 241.

In this case, since the discharge cells 320 have a square shape, the first discharge corners 321 and 322 are located along one side of the discharge cell 320 adjacent to the X electrode line 341. Say. The first discharge parts 242 and 243 are drawn out from the inner wall of the X electrode line 241 so as to surround the plurality of first discharge corner parts 321 and 322 together.

Accordingly, the X electrode 240 has the first discharge corners 321 and 322 on one side of the discharge cell 320 and the X electrode line 241, and a plurality of first discharge parts 242 protruding therefrom. 243 is a structure wrapped around each.

The Y electrode 250 includes a Y electrode line 251 disposed along the discharge cells 420 disposed adjacent to each other in the X direction of the panel 200 with the discharge cells 420 interposed therebetween. The Y electrode line 251 is disposed in a direction parallel to the X electrode line 251 and is embedded in the second dielectric wall 232. In addition, the Y electrode lines 251 have a strip shape, and one Y electrode line 251 is disposed for each second dielectric wall 232.

A plurality of second discharge parts 252 and 253 are drawn out to the Y electrode line 251 toward the X electrode 240. The second discharge parts 252 and 253 extend from the inner wall of the Y electrode line 251 to surround the second discharge corner parts 323 and 324 together with the Y electrode line 251.

The second discharge corners 323 and 324 refer to both corners adjacent to the Y electrode line 251 along the other side of the discharge cell 320 facing the first discharge corners 321 and 322. The second discharge parts 252 and 253 are drawn out from the inner wall of the Y electrode line 251 so as to surround the plurality of second discharge corner parts 323 and 324 together.

As such, the Y electrode 250 includes the second discharge corners 323 and 324 of the other side of the discharge cell 320 and the X electrode line 251 and the plurality of second discharge parts 252 protruding therefrom. The structure is enclosed by (253).

In this case, the first discharge parts 242 and 243 and the second discharge parts 252 and 253 are disposed to face each other.

That is, the first discharge parts 242 and 243 may form the first discharge corner parts 321 and 322 located on one side of the discharge cell 320 along the Y direction of the panel 200, and the X electrode line 241. It protrudes to wrap together. The length of the first discharge parts 242 and 243 is 1/2 or less of the length of the discharge cell 320.

In addition, the second discharge parts 252 and 253 also move the second discharge corner parts 323 and 324 located on the other side of the discharge cell 320 along the Y direction of the panel 200 to the Y electrode line 251. It protrudes so as to wrap together, and its length is 1/2 or less of the length of the discharge cell 320.

The first discharge parts 242 and 243 and the second discharge parts 252 and 253 are branched to face at predetermined intervals on both sides of the discharge cell 320 along the Y direction of the panel 200. It is arranged.

Meanwhile, the X electrode 240 and the Y electrode 250 are not disposed inside the discharge cell 320, but are disposed along the circumference of the discharge cell 320 so that the X electrode 240 and the Y electrode 250 are independent of the aperture ratio of the panel 200. It may be formed using an opaque silver paste or a metal material having excellent conductivity such as chromium-copper-chromium (Cr-Cu-Cr).

The operation of the plasma display panel 200 having the above structure will be described below with reference to FIGS. 2 to 5.

First, when a predetermined pulse voltage is applied between the address electrode 270 and the Y electrode 250 from an external power source, the discharge cell 320 to emit light is selected. Wall charges are accumulated on the inner surface of the selected discharge cell 320.

Subsequently, when a voltage of “+” is applied to the X electrode 240 and a voltage higher than this is applied to the Y electrode 250, wall charges are caused by the voltage difference between the X and Y electrodes 240 and 250. Will move.

Next, the plasma is generated while colliding with the discharge gas atoms in the discharge cell 320 by the movement of the wall charges, and the discharge is performed by the first and second discharge corners of the discharge cell 320 in which the relatively strong electric field is formed. Starting from 321 to 324 and expanding toward the center of the discharge cell 320.

In this manner, after the discharge is formed, if the voltage difference between the X and Y electrodes 240 and 250 becomes lower than the discharge voltage, the discharge no longer occurs, and the space charge and the wall charge are discharged to the discharge cell 320. Is formed. At this time, if the polarities of the voltages applied to the X and Y electrodes 240 and 250 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 240 and 250 are immediately changed, the first discharge process is repeated. The discharge is stably generated while repeating this process.

In this case, the ultraviolet rays generated by the discharge excite the fluorescent material of the phosphor layer 310 applied to each discharge cell 320. Through this process, visible light is obtained. The generated visible light is emitted to the discharge cells 320 to implement a still image or a moving image.

Here, the first discharge corners 321 and 322 of the discharge cell 320 are wrapped by the X electrode line 241 and the plurality of first discharge parts 242 and 243 protruding therefrom. The second discharge corner portions 323 and 324 are surrounded by the Y electrode line 251 and the plurality of second discharge portions 252 and 253 protruding therefrom, so that the first discharge portions 242 ( Since the probability of the discharge start at the ends of the 243 and the second discharge units 252 and 253 is increased, the discharge start voltage can be lowered.

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

First, a plurality of discharge parts branched from discharge electrode lines arranged oppositely along the circumference of the discharge cell are drawn out, and the plurality of discharge parts are disposed oppositely along one side of the discharge cell, thereby enabling discharge at a low discharge voltage. .

Second, as the probability of starting discharge between discharge electrodes increases, stabilization of sustain discharge can be achieved.

Third, the luminous efficiency of the panel is improved.

Fourth, since discharge occurs from the diagonal edges of the discharge cells and diffuses to the center, discharge efficiency is increased.

Fifth, since the path of the ion particles is formed in the horizontal direction of the phosphor layer during the sustain discharge, the ion sputtering of the phosphor layer can be prevented to improve the lifetime.

Sixth, discharge is implemented along the side of the discharge cell, so that the discharge surface is greatly enlarged.

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 (9)

Front substrate; A rear substrate disposed to face the front substrate; A dielectric wall disposed between the front and back substrates and defining a discharge cell together with the front and back substrates; A first discharge electrode embedded in the dielectric wall and branched to surround a first discharge corner of one side of the discharge cell, and a branch to surround a second discharge corner of the other side of the discharge cell facing the first discharge corner; A plurality of discharge electrode pairs having a saturated second discharge electrode; And And a red, green, and blue phosphor layer coated in the discharge cell. The method of claim 1, The first discharge electrode extends in a direction in which the first discharge electrode line is disposed along the discharge cells continuously formed along one direction of the substrate and the second discharge electrode is drawn out from the first discharge electrode line. A first discharge part surrounding the first discharge corner part together with the first discharge electrode line, The second discharge electrode is drawn out from the second discharge electrode line and the second discharge electrode line extending in a direction parallel to the first discharge electrode line along one direction of the substrate facing each other with the discharge cell interposed therebetween. And a second discharge portion extending in a direction in which the first discharge electrode is disposed to surround the second discharge corner portion together with the second discharge electrode line. The method of claim 2, The first discharge corner is at least one corner formed along one side of the discharge cell, the second discharge corner is at least one corner formed along the other side of the discharge cell, The first discharge part may be drawn out from the inner wall of the first discharge electrode line so as to completely cover the first discharge corner part, and the second discharge part may be formed to cover the second discharge corner part, respectively. A plurality of plasma display panels are drawn out from the inner wall. The method of claim 3, wherein And a plurality of first discharge portions and a plurality of second discharge portions extend from respective corner portions of the discharge cells so that the plurality of first discharge portions and the plurality of second discharge portions are disposed to face each other at predetermined intervals along one direction of the dielectric wall. . The method of claim 1, The first discharge electrode is an X electrode, the second discharge electrode is a Y electrode causing a sustain discharge with the X electrode, and the discharge cell is addressed with the Y electrode in a direction crossing the first and second discharge electrodes. A plasma display panel further comprising an address electrode for causing a discharge. The method of claim 1, The dielectric wall includes a first dielectric wall disposed along one direction of the substrate and a second dielectric wall extending in a direction opposite from the inside of the pair of first dielectric walls to define a discharge cell. Plasma display panel. The method of claim 1, And the first discharge electrode and the second discharge electrode are disposed on the same plane in the dielectric wall. The method of claim 1, A partition wall having a structure corresponding to the dielectric wall is further provided between the dielectric wall and the back substrate, and the phosphor layer is coated inside the partition wall. The method of claim 1, And a passivation layer is further formed on the inner surface of the dielectric wall to increase secondary electron emission.

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