KR20070056790A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to stabilize discharge by forming an enlarged area in an address electrode to be addressed with a Y electrode of sustain discharge electrodes. A plasma display panel includes a front substrate(111), a rear substrate(161), plural pairs of discharge electrodes, and a dielectric layer(114,163). The rear substrate is disposed opposite to the front substrate. The pairs of discharge electrodes are disposed between the front substrate and the rear substrate. In the pairs of discharge electrodes, an intersection has an enlarged area. The dielectric layer is formed to bury the pairs of discharge electrodes. An electric field concentration part is formed at the dielectric layer.

Description

Plasma display panel {Plasma display panel}

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

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

3 is a plan view illustrating a state in which the address electrode of FIG. 1 is disposed;

4 is a plan view showing an address electrode according to a second embodiment of the present invention;

5 is a plan view showing an address electrode according to a third embodiment of the present invention;

FIG. 6 is an exploded perspective view illustrating a portion of a plasma display panel cut out according to another embodiment of the present invention; FIG.

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

100 ... plasma display panel

111 ... Front substrate 112 ... X electrode

113 Y electrode 114 Front dielectric layer

115.Protective layer 120.Field concentrator

161 Back panel 162 Address electrode

163 back dielectric layer 164 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 an electric field concentrating portion is formed between X and Y electrodes, and at the same time, the structure of the address electrode in a position corresponding to the Y electrode is improved.

In general, a plasma display panel injects and discharges a discharge gas on two substrates on which a plurality of discharge electrodes are formed, and then applies a predetermined discharge voltage. When the gas emits light in the discharge cell due to the discharge voltage, an appropriate pulse voltage is applied. It refers to a flat display device that implements a desired number, letter, or graphic by addressing a point where two electrodes intersect with each other.

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 DC plasma display panel has a structure in which all electrodes are exposed to a discharge space, and charges are directly transferred between 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 corresponding thereto are provided for each unit pixel to generate addressing discharge and sustain discharge.

Among them, a conventional three-electrode surface discharge type plasma display panel includes a front substrate, a rear substrate disposed to face the substrate, an X electrode and a Y electrode which are sustain discharge electrode pairs formed on an inner surface of the front substrate, and an X and Y electrode. A front dielectric layer, a protective film layer coated on a surface of the front dielectric layer, an address electrode formed on an upper surface of the rear substrate, disposed in a direction crossing the X and Y electrodes, a back dielectric layer filling the address electrode, a front surface, and And a red, green, and blue phosphor layer coated on the inner side of the partition and the surface of the back dielectric layer. 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 operation of a conventional plasma display panel having such a structure will be briefly described as follows.

First, a discharge cell for light emission is selected by applying an address voltage between the Y electrode and the address electrode, and a surface discharge is generated in the discharge region of the front dielectric layer and the passivation layer layer by applying a sustain discharge voltage between the X and Y electrodes. Is generated, and the still image or the moving image is realized as the fluorescent material of the phosphor layer is excited by the generated ultraviolet rays.

In the conventional plasma display panel, however, the front dielectric layer filling the X electrode and the Y electrode, which are the sustain discharge electrode pairs, is printed with the same thickness through the entire area of the front substrate. Such a structure can be easily manufactured using the raw material for the dielectric layer by the printing method, but has a disadvantage in that the discharge voltage is increased due to the long path of the electric field between the X and Y electrodes.

Accordingly, in recent years, the structure of a panel for improving low-voltage sustain discharge and efficiency by etching a dielectric layer between an X electrode and a Y electrode is being researched and developed. Due to a structural problem of the address electrode addressed to the Y electrode, addressing discharge instability is prevented. It is necessary to resolve.

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 capable of stabilizing discharge and reducing power consumption by improving the structure of the address electrode addressed to the Y electrode.

Another object of the present invention is to provide a plasma display panel capable of discharging high brightness and high efficiency by forming an electric field concentrating part in the discharge gap between the X electrode and the Y electrode.

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

Front substrate;

A rear substrate disposed to face the front substrate;

A plurality of discharge electrode pairs disposed between the front substrate and the rear substrate and having enlarged areas of portions intersecting with each other; And

And a dielectric layer filling the discharge electrode pairs and having an electric field concentrating portion formed thereon.

The discharge electrode pair may include a first discharge electrode disposed in one direction of the substrates and a second discharge electrode disposed in the other direction of the substrates, wherein the first discharge electrode and the second discharge electrode cross each discharge cell. It is characterized in that it is arranged to.

In addition, the second discharge electrode may include a main electrode part and an auxiliary electrode part integrally formed from the main electrode part and having an enlarged area of a portion corresponding to the first discharge electrode.

Further, the first discharge electrode is composed of a pair of X and Y electrodes for generating sustain discharge, and the second discharge electrode is composed of the Y electrode and an address electrode for generating addressing discharge.

In addition, the electric field concentrator is disposed in the discharge gap between the X electrode and the Y electrode, characterized in that the region where the dielectric layer is not formed.

Further, the electric field concentrator is disposed in the discharge gap between the X electrode and the Y electrode, and characterized in that the region formed by making the thickness of the dielectric layer relatively thinner than other portions.

The electric field concentrator may be disposed in a discharge gap between the X electrode and the Y electrode, and may have a groove shape in which a dielectric layer is not formed for each discharge cell.

Further, the electric field concentrator may be disposed in a discharge gap between the X electrode and the Y electrode, and may have a groove shape formed by relatively thin thickness of the dielectric layer for each discharge cell.

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

Front substrate;

A pair of sustain discharge electrode pairs disposed alternately on an inner surface of the front substrate and having an X electrode and a Y electrode causing sustain discharge;

A front dielectric layer filling the sustain discharge electrode pair and having an electric field concentrating portion formed thereon;

A rear substrate disposed to face the front substrate;

An address electrode disposed in a direction crossing the sustain discharge electrode pair, causing addressing discharge with the Y electrode, and having an enlarged area of a portion crossing the sustain discharge electrode pair;

A back dielectric layer filling the address electrode;

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

And red, green, and blue phosphor layers coated in the barrier ribs.

The address electrode may include a main electrode portion and an auxiliary electrode portion having an enlarged area of a portion corresponding to the Y electrode from the main electrode portion.

In addition, the main electrode portion is characterized in that the strip.

Further, the auxiliary electrode portion extends to the side wall of the main electrode portion, and is combined with the main electrode portion, characterized in that any shape selected from polygonal, circular, or oval.

In addition, the electric field concentrator is disposed in the discharge gap between the X electrode and the Y electrode, it characterized in that the area where the front dielectric layer is not formed.

Further, the electric field concentrator is disposed in the discharge gap between the X electrode and the Y electrode, and characterized in that the front dielectric layer is a region formed by relatively thinner than other portions.

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

Front substrate;

A pair of sustain discharge electrode pairs disposed alternately on an inner surface of the front substrate and including an X electrode and a Y electrode for causing sustain discharge;

A front dielectric layer filling the sustain discharge electrode pair and having a groove-shaped electric field concentrating portion formed for each discharge cell;

A rear substrate disposed to face the front substrate;

An address electrode disposed on an inner surface of the rear substrate in a direction crossing the sustain discharge pair, causing an addressing discharge with a Y electrode, and having an enlarged area of a portion corresponding to the sustain discharge electrode pair;

A back dielectric layer filling the address electrode;

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

And red, green, and blue phosphor layers formed in the barrier ribs.

The address electrode may include a main electrode portion and an auxiliary electrode portion extending from a sidewall of the main electrode portion and having an enlarged area of a portion corresponding to the Y electrode.

Further, the main electrode portion is characterized in that the strip.

In addition, the auxiliary electrode unit is coupled to the main electrode unit is characterized in that any shape selected from polygonal, circular, or oval.

In addition, the electric field concentrator is disposed in the discharge gap between the X electrode and the Y electrode for each discharge cell, and is characterized in that the region where no dielectric layer is formed for each discharge cell.

Further, the electric field concentrator is disposed in the discharge gap between the X electrode and the Y electrode for each discharge cell, and characterized in that the area of the dielectric layer is formed relatively thin for each discharge cell.

In addition, the electric field concentrator may be selectively formed only in the discharge gap between the X electrode and the Y electrode for each discharge cell.

In addition, the electric field concentrator is characterized in that the front dielectric layer is formed in the entire area of the front substrate to fill the X electrode and the Y electrode, except for the discharge gap between the X electrode and the Y electrode.

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

FIG. 1 illustrates a plasma display panel 100 according to an embodiment of the present invention, FIG. 2 is a cutaway view taken along the line I-I of FIG. 1, and FIG. 3 is a view illustrating the discharge electrodes of FIG. 1. The state is shown.

1 to 3, the plasma display panel 100 includes a front substrate 111 and a back substrate 162 disposed in parallel with the front substrate 111. The front and back substrates 111 and 162 form a discharge space enclosed by frit glass applied along edges of opposed inner surfaces.

The front substrate 111 may be a transparent substrate such as soda lime glass, a semi-transmissive substrate, a reflective substrate, a colored substrate, or the like. A sustain discharge electrode pair is formed on the bottom surface of the front substrate 111. The sustain discharge electrode pair is composed of the X electrode 112 and the Y electrode 113, and the X electrode 112 and the Y electrode 112 are arranged in pairs for each discharge cell.

The X electrode 112 protrudes toward the Y electrode 113 from the first discharge electrode line 112a disposed along the X direction of the front substrate 111 and the first discharge electrode line 112a. One projecting electrode 112b is included. The first discharge electrode line 112a has a strip shape, and the first protruding electrode 112b has a square shape.

In this case, the first discharge electrode line 112a and the first protruding electrode 112b may be formed using a transparent conductive film such as an ITO film, or the first discharge electrode line 112a may be a silver paste or chromium having excellent conductivity. It is made of a metal material such as copper-chromium, and the first protruding electrode 112b is formed of a heterogeneous conductive film by using a transparent conductive film such as an ITO film, or the first discharge electrode line 112a. The first protruding electrode 112b may be formed of a silver paste having excellent conductivity, or an opaque metal material such as chromium-copper-chrome, or the first discharge electrode line 112a and the first protruding electrode 112b may be formed. All of them may be formed of a conductive film such as an ITO film, and may be laminated with an opaque metal material, such as silver paste, to reduce its line resistance along one edge of the first discharge electrode line 112a, or may be formed using a mixture of the above methods. Might It is not limited to either.

The Y electrode 113 may include a second discharge electrode line 113a disposed along the X direction of the front substrate 111, and a second protrusion electrode 113 protruding toward the X electrode 112 from the second discharge electrode line 113a. 2 protruding electrodes 113b are included. The second discharge electrode line 113a has a strip shape, and the second protruding electrode 113b has a square shape. The Y electrode 113 is disposed to face the X electrode 112 for each discharge cell, it is preferable to have a symmetrical shape for the discharge uniformity. The Y electrode 113 is also made of substantially the same material as the X electrode 112.

The X electrode 112 and the Y electrode 113 are buried by the front dielectric layer 114. The front dielectric layer 114 is applied using a transparent dielectric, for example, a highly dielectric material such as PbO-B ₂ O ₃ -SiO ₂ .

A protective film layer 115 made of magnesium oxide (MgO) is formed on the surface of the front dielectric layer 114 to increase secondary electron emission amount. The passivation layer 115 is deposited on the front surface of the dielectric layer 114.

The back substrate 161 may be a transparent substrate, a semi-transmissive substrate, a reflective substrate, a colored substrate, or the like. The address electrode 162 is disposed on the inner surface of the rear substrate 161 in a direction crossing the X electrode 112 and the Y electrode 113. The address electrode 162 is strip-shaped and extends across discharge cells disposed adjacently along the Y direction of the rear substrate 161. The address electrode 162 is made of a metal material having excellent conductivity, such as silver paste. The address electrode 162 is embedded by the back dielectric layer 163. The address electrode 162 is made of a highly dielectric material such as the front dielectric layer 114.

A partition wall 164 is disposed between the front and rear substrates 111 and 161. The partition wall 164 defines a discharge cell and is formed to prevent cross talk between adjacent discharge cells.

The partition wall 164 is arranged in a direction parallel to the address electrode 162 (the X direction of the substrate) and in a direction parallel to the address electrode 162 (the X direction of the substrate). The second partition 164b is included. The first partition wall 164a is integrally extended to the adjacent second partition walls 164b in a direction facing each other, thereby defining a matrix discharge space.

The partition wall 164 is not limited to the above-described embodiment, and is not limited to any structure as long as the structure can partition the discharge space. Accordingly, the unit discharge space is not a rectangle, but a polygon other than a rectangle, a circle, Various embodiments such as elliptical will be present.

On the other hand, red, green, and blue phosphor layers 164 are coated on each side of the partition wall 164 and the inner surface of the back dielectric layer 163 for each discharge cell. The red, green, and blue phosphor layers 265 are formed of respective phosphors, and the red phosphor layer is composed of (Y, Gd) BO ₃ ; Eu ⁺³ , and the green phosphor layer is Zn ₂ SiO _4. It is preferable that it is made of: Mn ²⁺ and the blue phosphor layer is made of BaMgAl ₁₀ O ₁₇ : Eu ²⁺ .

Here, the area of the intersecting portion of the address electrode 162 crossing the sustain discharge electrode pair is enlarged, and the electric field concentrator 120 is formed between the X electrode 112 and the Y electrode 113. have.

In more detail, it is as following.

The X electrode 112 and the Y electrode 113 are disposed to face each other in the discharge cells arranged adjacently along the X direction of the panel 100. The X electrode 112 has a first discharge electrode line 112a extending in a strip shape along one side of the discharge cell. The first protruding electrode 112b protrudes from the first discharge electrode line 112a toward the center of the discharge cell. The second discharge electrode line 112b extends in a strip shape along the other side of the discharge cell in the opposite direction in which the X electrode 112 is disposed. The second protruding electrode 113b protrudes from the second discharge electrode line 113a toward the center of the discharge cell.

The first protruding electrode 112b and the second protruding electrode 113b are arranged to be spaced apart from each other without contacting each other from the center of the discharge cell. As a result, a discharge gap is formed between the first protrusion electrode 112b and the second protrusion electrode 113b.

In addition, the address electrode 162 is disposed in the Y direction of the panel 100 which is the direction intersecting the X electrode 112 and the Y electrode 113. The address electrode 162 includes the X electrode 112 and a main electrode portion 162a extending across the Y electrode 113. The main electrode portion 162a extends across the center of discharge cells disposed adjacent to each other along the Y direction of the panel 100, and includes the first protruding electrode 112b and the second protruding electrode 113b. It is located in the corresponding position. The main electrode portion 162a has a strip shape.

An auxiliary electrode portion 162b having an enlarged area therefrom is formed in the main electrode portion 162a. The auxiliary electrode part 162b extends integrally along the X direction of the panel 100 from both sidewalls of the main electrode part 162a. The auxiliary electrode part 162b is combined with the main electrode part 162a to form a square shape, but is not limited thereto.

That is, as shown in FIG. 4, the address electrode 464 includes a strip-shaped main electrode portion 464a and an auxiliary electrode portion 464b having an enlarged area on both sidewalls of the main electrode portion 464a. The auxiliary electrode portion 464b is combined with the main electrode portion 464a to form a hexagon, or as shown in FIG. 5, the address electrode 564 includes a strip-shaped main electrode portion 564a, It includes an auxiliary electrode portion 564b enlarged to both sidewalls of the main electrode portion 564a, the auxiliary electrode portion 564b can be combined with the main electrode portion 564a to form a circular shape.

Referring to FIG. 3 again, the auxiliary electrode portion 162b has an enlarged area at a portion corresponding to the Y electrode 113 causing the address discharge among the sustain discharge electrode pairs. That is, the auxiliary electrode part 162b is disposed at a portion corresponding to the second protruding electrode 113b protruding toward the center of the discharge cell. The area of the auxiliary electrode portion 164b is equal to or less than the area of the second protruding electrode 113b. The auxiliary electrode part 162b is formed for each discharge cell.

As shown in FIG. 2, at least one electric field concentrator 120 is formed between the X electrode 112 and the Y electrode 113 to reduce the discharge start voltage.

The electric field concentrator 120 may be formed by adjusting the thicknesses of the X electrode 112 and the front dielectric layer 114 filling the Y electrode 113, and the X electrode 112 and the Y electrode. The thickness of the discharge gap between the layers 113 is made thinner than that of other regions of the discharge cells.

The reason why the thickness of the discharge gap between the X electrode 112 and the Y electrode 113 is formed thinner than the thickness of the other regions due to the electric field concentrator 120 is that the X electrode 112 and the Y electrode ( It is intended to increase the probability that the ionization excitations of gas atoms can be energized with a stronger electric field effect in the discharge gap between them.

To this end, the front dielectric layer 114 concentrates an electric field on the discharge gap between the X electrode 112 and the Y electrode 113 when the front electrode dielectric layer 114 and the Y electrode 113 are printed to be buried together. In order to form the portion 120, the front dielectric layer 114 is printed with a predetermined thickness over the entire area of the front substrate 111 except for this region. Accordingly, the region where the electric field concentrator 120 is formed is a region where the front dielectric layer 114 is not formed.

Alternatively, the front dielectric layer 114 is formed in the discharge gap between the X electrode 112 and the Y electrode 113, and in other regions of the discharge cell, but the front dielectric layer 114 is a discharge cell. The electric field concentrator 120 may be formed by forming relatively thinner in the region where the discharge gap is formed than in the other region.

The electric field concentrator 120 extends across adjacent discharge cells along the direction in which the X electrode 112 and the Y electrode 113 are disposed (X direction) for ease of manufacturing the panel 100. It can form continuously over the discharge gap between the said X electrode 112 and the Y electrode 113. FIG.

Meanwhile, a passivation layer 115 such as magnesium oxide (MgO) is deposited on the surface of the front dielectric layer 114 to increase secondary electron emission.

The operation of the plasma display panel 100 according to the exemplary embodiment of the present invention having the above configuration will be described with reference to FIGS. 1 to 3.

First, when a predetermined address voltage is applied to the Y electrode 113 and the address electrode 162 from an external power source, a discharge cell to emit light is selected. Wall charges are accumulated on the Y electrode 113 of the selected discharge cell. At this time, the generated wall charge is charged in the electric field concentrator 120 formed in the discharge gap between the X and Y electrodes 112 and 113.

Subsequently, when the voltage “+” is applied to the X electrode 112 and a voltage higher than this is applied to the Y electrode 113, the voltage difference between the X electrode 112 and the Y electrode 113 is applied. Wall charges move. The discharge start voltage for the sustain discharge can be lowered by the electric field concentrator 120 and the electric charges charged therein.

That is, the movement of the wall charges causes the discharge while colliding with the discharge gas atoms in the discharge space, and the discharge is generated from the discharge gap between the X electrode 112 and the Y electrode 113 having a relatively strong electric field. The discharge is started.

Subsequently, as time passes, if the voltage difference between the X electrode 112 and the Y electrode 113 is still sufficiently sufficiently large, the electric field formed between the two electrodes 112 and 113 is gradually concentrated, thereby discharging. It spreads to the whole discharge space.

If the voltage difference between the X electrode 112 and the Y electrode 113 becomes lower than the discharge voltage after the discharge is formed in this manner, the discharge no longer occurs, and the space charge and the wall charge are formed in the discharge space. . At this time, if the polarities of the X electrode 112 and the Y electrode 113 are changed to each other, the first 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 165 applied to each discharge space. Through this process, visible light is obtained. The generated visible light is radiated into the discharge space to realize an image.

As described above, since the discharge is preferentially initiated in the discharge gap between the X electrode 112 and the Y electrode 113 in which the electric field concentrator 120 is formed, the plasma density is concentrated around the discharge gap. Further, the plasma can be diffused to the outside of the X electrode 112 and the Y electrode 113 based on the high density of electrons and ions, so that the distribution of wall charges can be formed in all regions.

In addition, during addressing discharge, the address electrode 162 where the address electrode 162 corresponds to the second protruding electrode 113b of the Y electrode 113 has an auxiliary electrode portion 162b having an enlarged area from both sidewalls of the main electrode portion 162a. ), The wall charges can be easily utilized to stabilize the discharge and reduce the total power consumption.

6 illustrates a plasma display panel 600 according to a second embodiment of the present invention.

Here, the plasma display panel 600 is shown by rotating the front substrate 611 and the back substrate 661 180 degrees to clearly show the features of the present embodiment.

Referring to the drawings, the plasma display panel 600 includes a front substrate 611 and a back substrate 661 disposed to face the front substrate 611.

An X electrode 612 and a Y electrode 613 are disposed on an inner surface of the front substrate 611 along the X direction of the panel 600, and the X electrode 612 and the Y electrode 613 are formed of a panel ( Alternately located along the Y-direction of 600).

The X electrode 612 includes a strip-shaped first discharge electrode line 612a and a first protruding electrode 612b protruding from the first discharge electrode line 612a toward the center of the discharge cell. The Y electrode 613 has a strip-shaped second discharge electrode line 613a and a second protruding electrode 613b protruding from the second discharge electrode line 613a toward the center of the discharge cell. The X electrode 612 and the Y electrode 613 are disposed to face each other with respect to the center of the discharge cell.

The X electrode 612 and the Y electrode 613 are buried by the front dielectric layer 614. At this time, at least one electric field concentrator 620 is formed in the discharge gap between the X electrode 612 and the Y electrode 613 to lower the discharge start voltage. The electric field concentrator 620 has a kind of groove shape formed in the discharge gap between the X electrode 612 and the Y electrode 613.

That is, the electric field concentrator 620 may be formed by adjusting the thickness of the X electrode 612 and the leading edge dielectric layer 614 filling the Y electrode 613, and the X electrode 612 and the Y electrode. The thickness of the discharge gap between the electrodes 613 is made thinner than other areas of the discharge cell, or the front dielectric layer 614 is not formed in the discharge gap between the X electrode 612 and the Y electrode 613. It is possible to form.

As described above, the thickness of the discharge gap between the X electrode 612 and the Y electrode 613 due to the electric field concentrator 620 is thinner than that of the other regions of the discharge cell. In order to increase the probability that the ionization excitations of the gas atoms can be actively activated by a stronger electric field effect in the discharge gap between the Y electrodes 613.

The electric field concentrator 620 may be discontinuously formed only in the discharge gap between the X electrode 612 and the Y electrode 613 for each discharge cell. That is, since the electric field concentrator 620 maintains a groove shape, the electric field concentrator 620 is not continuously formed along the X or Y direction of the panel 600 on which the X electrode 612 and the Y electrode 613 are disposed. Only the discharge gap of the X electrode 612 and the Y electrode 613 of each discharge cell is selectively formed.

Accordingly, the front dielectric layer 614 covers the entire region on the front substrate 661 except for the electric field concentrator 620 formed in the discharge gap region between the X electrode 612 and the Y electrode 613. It forms, and the said X electrode 612 and the Y electrode 613 are embedded.

Meanwhile, a passivation layer 615 may be further formed on the front surface of the front dielectric layer 614 to increase secondary electron emission.

In addition, an address electrode 662 is disposed on an inner surface of the rear substrate 661. The address electrode 662 extends along the Y direction of the panel 600, which is a direction crossing the X electrode 612 and the Y electrode 613.

At this time, the address electrode 662 includes a strip-shaped main electrode portion 662a and an auxiliary electrode portion 662b extending integrally from both sidewalls of the main electrode portion 662a to enlarge an area thereof. The portion where the auxiliary electrode portion 662b is formed is a portion corresponding to the second protruding electrode 613b of the Y electrode 613 to maintain the stabilization of the discharge when addressing the Y electrode 613.

The address electrode 662 is embedded by the back dielectric layer 663. A partition wall 664 is formed on the top surface of the back dielectric layer 663 to define discharge cells. A red, green, and blue phosphor layer is formed on the inner wall of the partition wall 664 and the surface of the back dielectric layer 663. 665 is formed.

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

First, an area having an enlarged area is formed in the address electrode addressed to the Y electrode of the sustain discharge electrodes, whereby the utilization of the wall charges can be expanded to stabilize the discharge and reduce the total power consumption.

Second, the discharge starts from the discharge gap between the X electrode and the Y electrode and extends to the outside of the X electrode and the Y electrode, so that the entire discharge cell emits light. The diffusion of the discharge is started from the region where the electric field concentrator is formed, so that the diffusion occurs very easily. Therefore, the luminous efficiency of the panel can be improved even at low power consumption.

Third, the driving voltage at the electric field concentrator is reduced.

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 (28)

Front substrate; A rear substrate disposed to face the front substrate; A plurality of discharge electrode pairs disposed between the front substrate and the rear substrate and having enlarged areas of portions intersecting with each other; And And a dielectric layer filling the discharge electrode pairs and having an electric field concentrating portion formed therein. The method of claim 1, The discharge electrode pair includes a first discharge electrode disposed in one direction of the substrates and a second discharge electrode disposed in the other direction of the substrates, and the first discharge electrode and the second discharge electrode are disposed to cross each discharge cell. Plasma display panel characterized in that. The method of claim 2, And the second discharge electrode includes a main electrode part and an auxiliary electrode part integrally formed from the main electrode part and having an enlarged area of a portion corresponding to the first discharge electrode. The method of claim 2, And the first discharge electrode is composed of a pair of X and Y electrodes for generating sustain discharge, and the second discharge electrode is composed of the Y electrode and an address electrode for generating addressing discharge. The method of claim 4, wherein And the field concentrator is disposed in a discharge gap between the X and Y electrodes and is a region where the dielectric layer is not formed. The method of claim 4, wherein And the field concentrator is disposed in a discharge gap between the X electrode and the Y electrode and is formed by making the thickness of the dielectric layer relatively thinner than other portions. The method according to claim 5 or 6, And the field concentrator is continuously formed along the same direction as the X electrode and the Y electrode. The method of claim 4, wherein And the field concentrator is disposed in a discharge gap between the X electrode and the Y electrode, and has a groove shape in which a dielectric layer is not formed for each discharge cell. The method of claim 4, wherein And wherein the electric field concentrator is disposed in a discharge gap between the X electrode and the Y electrode, and has a groove shape formed by thinning a dielectric layer for each discharge cell. The method according to claim 8 or 9, And wherein the groove is discontinuously formed in the discharge gap between the pair of X and Y electrodes for each discharge cell. The method of claim 1, And a passivation layer is further formed on the surface of the dielectric layer to increase secondary electron emission. Front substrate; A pair of sustain discharge electrode pairs disposed alternately on an inner surface of the front substrate and having an X electrode and a Y electrode causing sustain discharge; A front dielectric layer filling the sustain discharge electrode pair and having an electric field concentrating portion formed thereon; A rear substrate disposed to face the front substrate; An address electrode disposed in a direction crossing the sustain discharge electrode pair, causing addressing discharge with the Y electrode, and having an enlarged area of a portion crossing the sustain discharge electrode pair; A back dielectric layer filling the address electrode; A partition wall disposed between the front substrate and the rear substrate to define a discharge cell; And And a red, green, and blue phosphor layer coated in the partition wall. The method of claim 12, And the address electrode includes a main electrode portion and an auxiliary electrode portion having an enlarged area of a portion corresponding to the Y electrode from the main electrode portion. The method of claim 13, And the main electrode portion is strip-shaped. The method of claim 13, And the auxiliary electrode unit extends to a side wall of the main electrode unit and is combined with the main electrode unit to have any one shape selected from polygonal, circular or elliptical shape. The method of claim 12, And wherein the electric field concentrator is disposed in a discharge gap between the X electrode and the Y electrode, and is a region where the front dielectric layer is not formed. The method of claim 12, And the field concentrator is disposed in a discharge gap between the X electrode and the Y electrode, and the front dielectric layer is a region formed by making the front dielectric layer relatively thinner than other portions. The method according to claim 16 or 17, And the field concentrator is continuously formed in parallel with the X and Y electrodes. The method of claim 11, And a passivation layer is further formed on the surface of the front dielectric layer to increase the amount of secondary electrons. Front substrate; A pair of sustain discharge electrode pairs disposed alternately on an inner surface of the front substrate and including an X electrode and a Y electrode for causing sustain discharge; A front dielectric layer filling the sustain discharge electrode pair and having a groove-shaped electric field concentrating portion formed for each discharge cell; A rear substrate disposed to face the front substrate; An address electrode disposed on an inner surface of the rear substrate in a direction crossing the sustain discharge pair, causing an addressing discharge with a Y electrode, and having an enlarged area of a portion corresponding to the sustain discharge electrode pair; A back dielectric layer filling the address electrode; A partition wall disposed between the front substrate and the rear substrate and defining a discharge cell; And And a red, green, and blue phosphor layer formed in the partition wall. The method of claim 20, And the address electrode includes a main electrode portion and an auxiliary electrode portion extending from a sidewall of the main electrode portion and having an enlarged area of a portion corresponding to the Y electrode. The method of claim 21, The main electrode portion is a plasma display panel characterized in that the strip type The method of claim 21, And the auxiliary electrode unit is combined with the main electrode unit and has a shape selected from a polygon, a circle, or an oval. The method of claim 21, And wherein the electric field concentrator is disposed in a discharge gap between the X electrode and the Y electrode for each discharge cell, and has no dielectric layer formed for each discharge cell. The method of claim 21, Wherein the electric field concentrator is disposed in a discharge gap between the X electrode and the Y electrode for each discharge cell, and has a relatively thin thickness of the dielectric layer for each discharge cell. The method of claim 24 or 25, And wherein the electric field concentrator is selectively formed only in the discharge gap between the X electrode and the Y electrode for each discharge cell. The method of claim 21, And the electric field concentrator is formed in the entire region of the front substrate to fill the X and Y electrodes, except for the discharge gap between the X and Y electrodes. The method of claim 20, And a passivation layer is further formed on a surface of the front dielectric layer to increase emission of secondary electrons.

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