KR100626067B1 - Plasma display panel - Google Patents

Abstract

A plasma display panel is disclosed. The present invention provides a plurality of substrates disposed to face each other; a dielectric wall disposed between the substrates and defining discharge cells therewith; and an X electrode separately disposed along the circumference of the discharge cell and embedded in the dielectric wall. A discharge sustaining electrode pair having a Y electrode; a red, green, and blue phosphor layer coated in the discharge cell; and a plurality of address electrodes disposed in a direction crossing the discharge sustaining electrode pair for each discharge cell; And a light blocking layer disposed in the non-discharge region formed between the discharge cells, and blocking external light to improve the contrast of the panel. Since the light blocking layer is connected to the discharge electrode, the same voltage can be applied. .

Description

Plasma display panel {Plasma display panel}

1 is a cross-sectional view showing a conventional plasma display panel;

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

3 is a cross-sectional view taken along the line II of FIG. 2;

4 is a plan view illustrating a state in which the discharge electrode and the light blocking layer of FIG. 3 are disposed;

5 is an exploded perspective view illustrating the discharge electrode and the light blocking layer of FIG. 3;

FIG. 6 is a plan view illustrating a discharge electrode and a light blocking layer of a plasma display panel according to a second exemplary embodiment of the present invention; FIG.

FIG. 7 is a cross-sectional view of the plasma display panel taken along the line II-II of FIG. 6; FIG.

<Description of Symbols for Major Parts of Drawings>

200 ... Plasma Display Panel 201 ... Front Board

202 ... back substrate 203 ... first dielectric wall

204 Second dielectric wall 205 Dielectric wall

206 ... X electrode 207 ... Y electrode

208 protective layer 209 address electrode

210 dielectric layer 213 bulkhead

214 phosphor layer 215 light blocking 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 in which a discharge electrode is disposed along a circumference of a discharge cell, and a light blocking layer is formed in a non-discharge region to improve discharge efficiency and contrast.

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

Referring to FIG. 1, the conventional three-electrode surface discharge plasma display panel 100 includes a front substrate 110, a rear substrate 120 disposed in parallel with the front substrate 110, and an X disposed on an inner surface of the front substrate 110. And a front dielectric layer 140 filling the Y electrodes 131 and 132, the X and Y electrodes 131 and 132, a protective layer 150 formed on a surface of the front dielectric layer 140, and An address electrode 160 disposed on an inner surface of the back substrate 120 and disposed in a direction crossing the X and Y electrodes 131 and 132, and a back dielectric layer 170 filling the address electrode 160. And a partition wall 180 disposed between the front and rear substrates 110 and 120, and a phosphor layer 190 of red, green, and blue applied to the inside of the partition wall 180.

In the conventional plasma display panel 100 having the structure described above, the discharge cells are selected at the intersection points by applying electrical signals to the Y electrode 132 and the address electrode 160, respectively, and then the X and Y electrodes 131. When surface discharge occurs from the surface of the front substrate 110 by alternately applying electrical signals to the 132, ultraviolet rays are generated, visible light is emitted from the red, green, and blue phosphor layers 190 coated in the selected discharge cells. It is possible to implement still images or moving pictures.

However, the conventional plasma display panel 100 has the following problems.

First, a pair of X electrodes 131, Y electrodes 132, and an address electrode 160 are disposed in one discharge cell, and the electrodes 131 to 160 are also disposed in another discharge cell adjacent thereto. Although they have the same arrangement structure, no light shielding means is provided in the non-discharge regions between adjacent discharge cells, so that light can be reflected from external light and the contrast can be reduced.

Second, since the X electrode 131, the Y electrode 132, the front dielectric layer 140, and the protective film layer 150 are sequentially formed on the inner surface of the front substrate 110, from the discharge space (S) The transmittance for generated visible light is less than 60%. Therefore, it does not function properly as a high efficiency flat panel display.

Third, when the plasma display panel 100 is driven for a long time, since the discharge is diffused toward the phosphor layer 190, the charged particles of the discharge gas cause ion sputtering on the phosphor layer 190 by an electric field, causing permanent afterimages. Let's do it.

Fourth, the discharge spreads outward from the discharge gap between the X and Y electrodes 131 and 132. Since the discharge spreads along the plane of the front substrate 110, the space utilization of the entire discharge cell is low.

Fifth, when a discharge gas containing a high concentration of Xe gas of 10% by volume or more is injected into the discharge cell, the generation of charged particles and excitation species is increased by ionization and excitation of atoms, thereby increasing luminance and discharge efficiency, but high concentration of Xe There is a disadvantage that the initial discharge firing voltage (initial discharge firing voltage) is increased for the reason of applying the gas.

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 in which a light blocking layer is formed in a non-discharge region between discharge cells to block light from external light to improve contrast.

Another object of the present invention is to provide a plasma display panel in which a plurality of discharge electrodes are arranged along the circumference of the discharge cell to increase the aperture ratio of the discharge cell to increase the brightness.

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

A plurality of substrates having a front substrate and a rear substrate disposed to face each other;

A dielectric wall disposed between the front substrate and the rear substrate and defining discharge cells together with the front and rear substrates;

A discharge sustaining electrode pair disposed separately along the circumference of the discharge cell and having an X electrode and a Y electrode embedded in the dielectric wall;

Red, green, and blue phosphor layers coated in the discharge cells;

A plurality of address electrodes arranged in a direction crossing the discharge sustaining electrode pairs for each of the discharge cells; And

And a light blocking layer disposed in the non-discharge region formed between the discharge cells and formed to improve contrast of the panel.

In addition, the X electrodes are continuously disposed along the circumference of the discharge cells disposed adjacently along the X direction of the substrate, are spaced apart by a predetermined interval along the Y direction of the substrate,

The Y electrodes are arranged separately in parallel with the X electrodes, are continuously disposed along a circumference of discharge cells disposed adjacently along the X direction of the substrate, and are spaced apart by a predetermined interval along the Y direction of the substrate. It is done.

Further, the dielectric wall includes a first dielectric wall disposed in the X direction of the substrate and a second dielectric wall disposed in the Y direction of the substrate, wherein the second dielectric wall is inside the pair of adjacent first dielectric walls. Is formed integrally extending in the opposite direction from

A non-discharge region formed by a dielectric wall is formed between the first and second X electrodes disposed along the Y direction of the substrate and engaged in different discharge cells.

In addition, the dielectric wall includes a first dielectric wall disposed in the X direction of the substrate and a second dielectric wall disposed in the Y direction of the substrate, wherein the second dielectric wall is inward of the pair of adjacent first dielectric walls. Is formed integrally extending in the opposite direction from

A non-discharge region formed of empty space is formed between the first and second X electrodes arranged along the Y direction of the substrate and engaged in different discharge cells.

Further, the light blocking layer is characterized in that it extends integrally from the non-discharge region to the first X electrode and the second X electrode.

Further, the light blocking layer is formed in a strip shape in a direction parallel to the X electrode along the X direction of the substrate.

In addition, the light blocking layer is formed in contact with the inner surface of the front substrate, the first X electrode and the second X electrode is characterized in that it is formed in contact with both edges of the surface of the light blocking layer.

In addition, the first X electrode and the second X electrode in contact with the light blocking layer are characterized in that the same voltage is applied together.

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.

FIG. 2 is a partial cutaway view of the plasma display panel 200 according to an embodiment of the present invention. FIG. 3 is a cutaway view taken along the line II of FIG. 2, and FIG. 4 is a discharge electrode of FIG. 3. And a light blocking layer are arranged, and FIG. 4 shows the discharge electrode and the light blocking layer of FIG. 3 separately.

2 to 4, the plasma display panel 200 includes a front substrate 201 and a rear substrate 202 disposed in parallel thereto. Frit glass is applied to the edges of the inner surfaces of the front and rear substrates 201 and 202 that face each other, and the inner spaces are sealed by sealing them.

The front substrate 201 is made of a transparent substrate such as soda lime glass. The back substrate 202 is also made of substantially the same material as the front substrate 201.

A dielectric wall 205 is defined between the front and rear substrates 201 and 202 to define a discharge cell together with them. The front dielectric wall 205 is made of a highly dielectric material, such as PbO-B ₂ O ₃ -SiO ₂ .

The dielectric wall 205 includes a first dielectric wall 203 disposed in the X direction of the panel 200 and a second dielectric wall 204 disposed in the Y direction, and includes a pair of adjacent first dielectrics. The second dielectric wall 204 extends integrally in an opposite direction from the inner side of the wall 203, and forms a matrix. As a result, the cross section of the unit discharge cell is square.

Alternatively, the dielectric wall 205 may be embodied in various shapes such as meander type, delta type or honeycobm type. In addition, the discharge cells defined by the dielectric wall 205 are not limited to any one of the discharge cell structures as long as the discharge cells defined by the dielectric walls 205 can define discharge cells such as hexagons, ellipses, and circles.

A partition wall 213 may be further formed between the back substrate 202 and the dielectric wall 205. The partition wall 213 is made of a low dielectric material unlike the dielectric wall 205. The partition wall 213 is formed in substantially the same shape at the portion corresponding to the dielectric wall 205.

The partition wall 213 includes a first partition wall 211 disposed in a direction parallel to the first dielectric wall 203, and a second partition wall 212 disposed in a direction parallel to the second dielectric wall 204. Doing. The first and second partitions 211 and 212 are integrally coupled to each other to form a matrix.

When only the dielectric wall 205 is formed between the front and back substrates 201 and 202, a single wall defines a discharge cell, and the dielectric wall 205 and the partition wall 213 are both front and back together. When formed between the back substrates 201 and 202, a two-layer wall made of a material having a different dielectric property becomes a structure defining a discharge cell.

The first discharge electrode 206 and the second discharge electrode 207 are embedded in the dielectric wall 205. The first and second discharge electrodes 206 and 207 are disposed along the circumference of the discharge cell, not inside the discharge cell. The first and second discharge electrodes 206 and 207 are electrically insulated from each other, and different voltages are applied.

Magnesium oxide (MgO) and magnesium oxide (MgO) are formed on the inner surface of the dielectric wall 205 so that ions generated inside the front substrate 201 along the four sidewalls of the discharge cell can emit secondary electrons by interaction with the surface. A protective film layer 208 made of the same material is formed. The protective layer 208 is deposited for each discharge cell.

The address electrode 209 is disposed on an upper surface of the rear substrate 202 in a direction crossing the first and second discharge electrodes 206 and 207. The address electrode 209 is located in the discharge cell. The address electrode 209 is buried by the back dielectric layer 210.

The plasma display panel 200 has a structure in which only the first and second discharge electrodes 206 and 207 are disposed or the first and second discharge electrodes 206 are disposed depending on whether the surface discharge, the opposite discharge, or the hybrid type is used. 207 and the address electrode 209 may be arranged together, and each discharge electrode may be arranged as a single electrode or a plurality of electrodes.

In the present exemplary embodiment, the first and second discharge electrodes 206 and 207 are electrodes for generating sustain discharge, and the first discharge electrode 206 corresponds to an X electrode which is a common electrode, and the second discharge. The electrode 207 corresponds to a Y electrode which is a scanning electrode, and has a structure in which a second discharge electrode 207 and an address electrode 209 causing addressing discharge are provided in a direction crossing them. The address electrode 209 may be disposed within the same dielectric wall 205 as the first and second discharge electrodes 206 and 207 as well as the back substrate 202. Hereinafter, the first and second discharge electrodes 206 and 207 will be referred to as X electrodes and Y electrodes.

Meanwhile, in the discharge cells defined by the front and back substrates 201 and 202, the dielectric walls 205, and the partition walls 213, neon (Ne) -xenon (Xe) or helium (He) -xenon ( A discharge gas such as Xe) is injected.

In the discharge cell, red, green, and blue phosphor layers 214 are formed which are excited by ultraviolet rays generated from the discharge gas and emit visible light. In this case, the phosphor layer 214 may be coated on any region of the discharge cell, but in the present embodiment, the phosphor layer 214 is coated with a predetermined thickness on the inner wall of the partition wall 213 and the upper surface of the back dielectric layer 210.

The red, green, and blue phosphor layers 214 are coated for each discharge cell. That is, 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, a non-discharge region is formed between discharge cells disposed adjacent to the Y direction of the panel 200, and a light blocking layer 215 is formed in the non-discharge region to improve the contrast of the panel 200.

In more detail, it is as following.

An X electrode 206 and a Y electrode 207 are embedded in the dielectric wall 205 defining the discharge cell. The X electrode 206 and the Y electrode 207 are arranged in parallel in substantially the same direction along one direction of the front substrate 201, and are vertically separated to apply different voltages.

At this time, the X electrode 206 is a structure that wraps around the discharge cell, and is continuously connected to the discharge cells arranged adjacently along the X direction of the front substrate 201. Alternatively, the X electrode 207 may be disposed along the circumference of each discharge cell, and a separate connection member may be disposed between the adjacent discharge cells along the X direction of the substrate 201 to connect them. In addition, the X electrodes 206 are disposed to be spaced apart by a predetermined interval between discharge cells arranged adjacently along the Y direction of the front substrate 201.

Like the X electrode 206, the Y electrode 207 is also disposed to be continuously connected along the circumference of the discharge cells arranged adjacently along the X direction of the front substrate 201, and the discharges are arranged adjacently along the Y direction. The cells are insulated from each other.

Accordingly, when the dielectric wall 205 is cut in the X direction of the panel 200, one X electrode 206 and one Y electrode 207 are vertically disposed in one second dielectric wall 204. Two X electrodes 206 and two Y electrodes which are arranged separately and are involved in the discharge of different discharge cells in the Y direction of the panel 200 in one first dielectric wall 203 when cut in the Y direction. The electrode 207 is separated and arranged up and down.

At this time, between the first X electrode 206a disposed in the second dielectric wall 204 to be involved in the discharge of one discharge cell and the second X electrode 206b that is involved in the discharge of another discharge cell adjacent thereto, This non-discharge area corresponds to the non-discharge area, which is filled by the second dielectric wall 204 together with the first X electrode 206a and the second X electrode 206b.

The light blocking layer 215 is provided in this non-discharge region.

The light blocking layer 215 is formed in a strip shape in a direction parallel to the X electrode 206 along the X direction of the panel 200. In addition, the light blocking layer 215 is disposed adjacent to each other along the Y direction of the front substrate 201 from the non-discharge region and is involved in the discharge of different discharge cells, and the second X electrode 206b. Extends integrally). On the other hand, the light blocking layer 215 is not provided on the first Y electrode 207a and the second Y electrode 207b disposed below the X electrode 206.

The light blocking layer 215 is formed in contact with the inner surface of the front substrate 201, the first X electrode 206a is formed along the upper edge of the light blocking layer 215, and the second X The electrode 206b is disposed in contact with the first X electrode 206a along the other upper edge of the light blocking layer 215.

On the other hand, the light blocking layer 215 is made of a conductive material, for example, any one selected from ruthenium or cobalt, or an alloy thereof. In addition, the light blocking layer 215 is made of any one material selected from a non-conductive material, such as manganese, titanium oxide (TiO), molybdenum, or a mixture thereof.

When the light blocking layer 215 is made of a conductive material, substantially the same voltage is applied to the first X electrode 206a and the second X electrode 206b adjacent thereto. Since the X electrodes 206 arranged along the Y direction of the panel 200 are energized with each other by the light blocking layer 215, the same discharge voltage is applied to the X electrodes 206 as a whole. As such, the X electrode 206 acts as a common electrode.

On the other hand, when the light blocking layer 215 is made of a non-conductive material, different voltages are applied to the first X electrode 206a and the second X electrode 206b, and the first and second X electrodes 206a are provided. ) 206b are each engaged with the same discharge voltage in discharge cells disposed adjacently along the Y direction of the panel 200.

FIG. 6 illustrates a state in which the discharge electrode and the light blocking layer of the plasma display panel 600 according to the second exemplary embodiment of the present invention are disposed, and FIG. 7 is a cutaway view taken along the line II-II of FIG. 6.

6 and 7, the panel 600 is provided with front and rear substrates 601 and 602, and a dielectric wall 605 is disposed between the front and rear substrates 601 and 602. .

The dielectric wall 605 includes a first dielectric wall 603 disposed in the X direction of the panel 600 and a second dielectric wall 604 disposed in the Y direction, and the first dielectric wall 603. ) Extends integrally from the pair of adjacent second dielectric walls 604 in opposite directions to define the discharge space S.

In this case, the dielectric walls 605 are continuously arranged by combining the first and second dielectric walls 603 and 604 to partition discharge spaces S disposed adjacently along the X direction of the panel 600. However, the first and second dielectric walls may be spaced apart from the first and second dielectric walls 603 and 604 continuously disposed along the X direction along the Y direction that is perpendicular thereto. 603 and 604 are continuously arranged. As a result, the non-discharge region NS is formed between the dielectric walls 605 arranged to be spaced apart by a predetermined interval along the panel 600.

In the dielectric wall 605 of this structure, the X electrode 606 and the Y electrode 607 are vertically separated, and the X and Y electrodes 606 and 607 are disposed along the circumference of the discharge cell, respectively. And are continuously connected along the discharge cells arranged adjacent to the X direction of the panel 600, and are spaced apart by a predetermined interval along the discharge cells disposed adjacent to the Y direction.

Here, the light blocking layer 615 is disposed in the non-discharge space NS between the pair of adjacent first dielectric walls 603, and the light blocking layer 615 is formed of the Y of the panel 600 from the non-discharge region. The first X electrode 606a), which is engaged in different discharge cells disposed adjacently along the direction, and the second X electrode 606b adjacent thereto are integrally extended.

The light blocking layer 615 is disposed in a strip shape along a direction parallel to the X electrode 606 disposed along the X direction of the panel 600. In addition, the light blocking layer 615 is formed to contact the inner surface of the front substrate 601, and the first and second X electrodes 606a and 606b face each other along both edges of the surface of the light blocking layer 615. It is arranged. On the other hand, the light blocking layer 615 is not provided on the first and second Y electrodes 607a and 607b.

As described above, the light blocking layer 615 may be made of a conductive material or a non-conductive material. When the light blocking layer 615 is formed of a conductive material, the light blocking layer 615 may be formed on the first and second X electrodes 606a and 606b that are engaged in different discharge cells. The same voltage is applied.

Meanwhile, an address electrode 609 is disposed on an inner surface of the rear substrate 602 in a direction crossing the X and Y electrodes 606 and 607, and the address electrode 609 is embedded by a dielectric layer 610. It is. In addition, a partition wall 613 is further provided between the rear substrate 602 and the dielectric wall 603 to partition a discharge space together with the dielectric wall 603. The side wall of the partition wall 613 and the dielectric layer 610 are also provided. ), Red, green, and blue phosphor layers 614 are coated.

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

First, when a predetermined pulse voltage is applied between the Y electrode 207 and the address electrode 209 from an external power source, the discharge cell to emit light is selected. Wall charges accumulate inside the selected discharge cells.

Subsequently, if a voltage of “+” is applied to the X electrode 206 and a voltage higher than this is applied to the Y electrode 207, the wall is caused by the voltage difference applied between the X and Y electrodes 206 and 207. The charge will move.

Next, the plasma is generated while colliding with the discharge gas atoms in the discharge cell by the movement of the wall charges, and the discharge starts from between the X and Y discharge electrodes 206 and 207 where a relatively strong electric field is formed. It expands to the whole.

In this way, after the discharge is formed, if the voltage difference between the X and Y electrodes 206 and 207 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 206 and 207 are reversed, the discharge is generated again with the help of wall charges. If the polarities of the X and Y electrodes 206 and 207 are immediately changed, the first discharge process is repeated. The discharge is stably generated while repeating this process.

Subsequently, the ultraviolet rays generated by the discharge excite the fluorescent material of the phosphor layer 216 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 image.

Here, the light blocking layer 215 is formed in the non-discharge space between the first X electrode 206a and the second Y electrode 206b that are involved in the discharge of the discharge cells arranged adjacently along the Y direction of the panel 200. As a result, light can be blocked from reflection of external light.

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

First, the light blocking layer is provided in the non-discharge space, thereby blocking external light, thereby improving the contrast of the panel.

Second, since the plurality of discharge electrodes that are involved in the discharge cells adjacent to the light blocking layer are electrically connected to each other, the same voltage can be applied.

Third, since the discharge electrode is disposed along the circumference of the discharge cell, it does not affect the aperture ratio of the substrate through which visible light passes. Thus, the luminance of the panel is greatly improved.

Fourth, the aperture ratio is greatly improved as the discharge electrode, the dielectric layer filling it, or the protective film layer are not formed inside the substrate through which visible light is transmitted.

Fifth, 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 (14)

A plurality of substrates having a front substrate and a rear substrate disposed to face each other; A dielectric wall disposed between the front substrate and the rear substrate and defining discharge cells together with the front and rear substrates; A discharge sustaining electrode pair disposed separately along the circumference of the discharge cell and having an X electrode and a Y electrode embedded in the dielectric wall; Red, green, and blue phosphor layers coated in the discharge cells; A plurality of address electrodes arranged in a direction crossing the discharge sustaining electrode pairs for each of the discharge cells; And And a light blocking layer disposed in the non-discharge region formed between the discharge cells and formed to improve contrast of the panel. The method of claim 1, The X electrodes are continuously disposed along the circumference of discharge cells arranged adjacently along the X direction of the substrate, and are spaced apart by a predetermined distance along the Y direction of the substrate, The Y electrodes are arranged separately in parallel with the X electrodes, are continuously disposed along a circumference of discharge cells disposed adjacently along the X direction of the substrate, and are spaced apart by a predetermined interval along the Y direction of the substrate. Plasma display panel. The method of claim 2, The dielectric wall includes a first dielectric wall disposed in the X direction of the substrate and a second dielectric wall disposed in the Y direction of the substrate, the second dielectric wall facing away from the inside of the pair of adjacent first dielectric walls. It is formed integrally extending in the direction And a non-discharge region formed by a dielectric wall between the first and second X electrodes arranged along the Y direction of the substrate and engaged in different discharge cells. The method of claim 2, The dielectric wall includes a first dielectric wall disposed in the X direction of the substrate and a second dielectric wall disposed in the Y direction of the substrate, the second dielectric wall facing away from the inside of the pair of adjacent first dielectric walls. It is formed integrally extending in the direction And a non-discharge area formed of empty space between the first and second X electrodes arranged along the Y direction of the substrate and engaged in different discharge cells. The method according to claim 3 or 4, And the light blocking layer extends integrally from the non-discharge region to the first X electrode and the second X electrode. The method of claim 5, wherein And the light blocking layer is formed in a strip shape in a direction parallel to the X electrode along the X direction of the substrate. The method of claim 5, wherein And the light blocking layer is in contact with an inner surface of the front substrate, and the first X electrode and the second X electrode are in contact with both sides of the surface of the light blocking layer. The method of claim 7, wherein And the same voltage is applied to the first X electrode and the second X electrode in contact with the light blocking layer. The method of claim 1, And the light blocking layer is made of a conductive material. The method of claim 9, The light blocking layer is any one selected from ruthenium, cobalt, and alloys thereof. The method of claim 1, And the light blocking layer is made of a non-conductive material. The method of claim 11, The light blocking layer is any one selected from manganese, titanium oxide, molybdenum, or a mixture thereof. The method of claim 1, And the address electrode is disposed between the rear substrate and the phosphor layer, and the address electrode is embedded by a dielectric layer. The method of claim 1, And a partition wall between the dielectric wall and the rear substrate to define a discharge cell together with the dielectric wall, wherein the phosphor layer is coated inside the partition wall.

Images