KR100751320B1 - Plasma display panel - Google Patents

Abstract

A plasma display panel is disclosed. The present invention provides a semiconductor device comprising: a front and rear substrate; a sustain discharge electrode pair having X and Y electrodes disposed on the front substrate; and at least one igniter electrode disposed in a discharge gap between the X and Y electrodes; A front dielectric layer having an electrode pair, an igniter electrode embedded therein, an address electrode disposed on the rear substrate, a rear dielectric layer filling the address electrode, and a partition wall disposed between the front and rear substrates to define a discharge space; And a red, green, and blue phosphor layer applied in the partition wall, and the driving voltage is reduced because the voltage reduction at the electric field concentration unit and the voltage reduction by the igniter electrode are simultaneously used.

Description

Plasma display panel {Plasma display panel}

1 is a cross-sectional view showing a unit discharge cell of a conventional plasma display panel;

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

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

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

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

200 ... plasma display panel

210 ... Front Panel 211 ... Front Board

212 ... holding discharge electrode 213 ... X electrode

214 ... Y electrode 215 ... first front dielectric layer

216 ... second front dielectric layer 217 ... front dielectric layer

218 Field concentrator 260 Rear panel

261 Back panel 262 Address electrode

263 back dielectric layer 264 bulkhead

265 phosphor layer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, wherein an igniter electrode is provided in a discharge gap between discharge electrodes, and at the same time, an electric field concentrator is formed to improve a discharge efficiency.

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 discharge voltage. When the gas emits light between the electrodes, an appropriate pulse voltage is applied. A flat display device is applied to implement a desired number, letter or graphic by addressing a point where two electrodes cross each other.

The plasma display panel may 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 may 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.

Referring to FIG. 1, a conventional plasma display panel 100 is formed on a front substrate 110, a rear substrate 120 disposed to face the front substrate 110, and a lower surface of the front substrate 110. A pair of X electrodes 131, a Y electrode 132, a front dielectric layer 140 filling the X and Y electrodes 131, 132, and a protective film coated on a surface of the front dielectric layer 140. A layer 150, an address electrode 160 formed on an upper surface of the rear substrate 120, a rear dielectric layer 170 filling the address electrode 160, and the front and rear substrates 110 and 120. The barrier rib 180 is disposed between the barrier rib 180 and the red, green, and blue protective layer 190 coated on the inner surface of the barrier rib 180 and the surface of the rear dielectric layer 170.

Meanwhile, a discharge gas is sealed in the inner spaces of the front and rear substrates 110 and 120 to form a discharge region S.

The operation of the plasma display panel 100 having the above structure will be briefly described as follows.

First, a discharge cell for emitting light is selected by applying an address voltage between the Y electrode 132 and the address electrode 160, and a sustain discharge voltage is applied between the X and Y electrodes 131 and 132 so that the front dielectric layer ( 140 and a surface discharge occurs in the discharge region of the passivation layer 150 surface, and ultraviolet rays are generated. As the fluorescent substance of the phosphor layer 190 is excited by the generated ultraviolet rays, a still image or a moving image is realized.

In the conventional plasma display panel 100, in order to improve the discharge efficiency, the discharge path is increased to increase the probability of actively ionizing the gas atoms.

In other words, where the discharge gap is short, the discharge is first started to lower the discharge voltage, and where the discharge gap is long, the efficiency is improved by the generation of charged particles and excitation species concentrated around the electrode during discharge. There is a need. One of such changes in the discharge cell structure is to change the structure of the front panel.

In addition, when the plasma display panel 100 is applied with a high concentration of Xe gas of 10% by volume or more, 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 The reason for applying the gas is that the discharging firing voltage is higher.

In addition, the plasma display panel 100 causes color bleeding due to other color emission in an undesired area during driving, thereby degrading display quality and contrast.

An object of the present invention is to provide a plasma display panel having a low discharge start voltage by inserting an igniter electrode serving as an auxiliary electrode in a discharge gap between discharge electrodes.

Another object of the present invention is to provide a plasma display panel in which an electric field concentrating portion is formed in a discharge gap between discharge electrodes to improve discharge efficiency.

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

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

Sustain discharge electrode pairs having X and Y electrodes alternately disposed on the front substrate;

At least one igniter electrode disposed in the discharge gap between the X and Y electrodes;

A front dielectric layer filling the discharge sustaining electrode pair and an igniter electrode;

A plurality of address electrodes arranged on the rear substrate in a direction crossing the sustain discharge electrode pairs;

A back dielectric layer filling the address electrode;

A partition wall disposed between the front and rear substrates to define a discharge space; And

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

The igniter electrode may include a first igniter electrode electrically connected to the X electrode, and a second igniter electrode electrically connected to the Y electrode.

In addition, the X electrode has a first electrode line disposed in one direction of the substrate and a first protrusion projecting into the discharge cell from the first electrode line toward the Y electrode, wherein the first igniter electrode comprises the first electrode. Projecting from the line toward the Y electrode.

Furthermore, the Y electrode has a second electrode line arranged in one direction of the substrate, and a second protrusion projecting from the second electrode line toward the X electrode into the discharge cell, wherein the second igniter electrode comprises the second electrode. Protrude from the line toward the X electrode.

In addition, the first and second igniter electrode is characterized in that the portion that is drawn out from the first and second electrode line corresponding to the partition wall.

In addition, at least one electric field concentrator is formed between the X and Y electrodes.

Further, the electric field concentrator is formed by making the thickness of the front dielectric layer between the X and Y electrodes thinner than other portions.

In addition, the gap between the electric field concentrator is formed to be narrower than the discharge gap between the X and Y electrodes.

Further, the front side dielectric layer includes the sustain discharge electrode pair, a first front side dielectric layer embedding an igniter electrode, and a second front side dielectric layer having the electric field concentrator formed on the first front side dielectric layer.

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 plasma display panel 200 according to an embodiment of the present invention.

Referring to the drawings, the plasma display panel 200 includes a front panel 210 and a rear panel 260 disposed in parallel with the front panel 210. The front and rear panels 210 and 260 are coated with frit glass along edges of opposed inner surfaces to seal the interior space.

The front panel 210 is provided with a front substrate 211, and the front substrate 211 is made of a transparent substrate such as soda lime glass. A sustain discharge electrode pair 212 is formed on the bottom surface of the front substrate 211. The sustain discharge electrode pair 212 includes an X electrode 213 and a Y electrode 214 disposed alternately with the X electrode 213.

The X electrode 213 has a first transparent electrode line 213a disposed in the X direction of the substrate 211 and a first protrusion 213b protruding from the first transparent electrode line 213a to the Y electrode 214. ) And a first bus electrode line 213c disposed at one edge of the first transparent electrode line 213a. The first bus electrode line 213c is disposed to reduce the line resistance of the first transparent electrode line 213a, and does not have the first transparent electrode line 213a, and the first protruding portion 213b and the first protruding portion 213b. It may be electrically connected.

In addition, the first transparent electrode line 213a and the first bus electrode line 213c are both stripe-shaped, and the first protrusion 213b preferably has a quadrangular shape, and the first transparent electrode line 213a. ) And the first protrusion 213b are made of a transparent conductive film such as indium tin oxide (ITO), and the first bus electrode line 213c is made of silver paste having excellent conductivity.

The Y electrode 214 also has a second transparent electrode line 214a disposed in the X direction of the substrate 211 and a second protrusion 214b protruding from the second transparent electrode line 214a to the X electrode 213. ) And a second bus electrode line 214c disposed at one edge of the second transparent electrode line 214a. Like the X electrode 213, the Y electrode 214 overlaps the second transparent electrode line 214a and the second bus electrode line 214c or may be formed of a single layer formed of the second bus electrode line 214c. have.

The sustain discharge electrode pair 212 is buried by the front dielectric layer 217. The front dielectric layer 217 is applied to fill the sustain discharge electrode pair 212 using a transparent dielectric such as PbO-B ₂ O ₃ -SiO ₂ .

A passivation layer 219 made of magnesium oxide (MgO) is formed on the front surface of the front dielectric layer 217 to increase secondary electron emission. The passivation layer 219 is coated on the entire surface of the front dielectric layer 217.

The back panel 260 is provided with a back substrate 261 made of substantially the same material as the front substrate 211. The address electrode 262 is disposed on an inner surface of the rear substrate 261 in a direction crossing the sustain discharge electrode pair 212. The address electrode 262 is striped and extends across discharge cells disposed adjacent to the Y-direction of the substrate 261, and is made of a metal material having excellent conductivity, such as silver paste.

The address electrode 262 is embedded by the back dielectric layer 263. The back dielectric layer 263 is made of a high dielectric material substantially the same as the front dielectric layer 217.

A partition wall 264 is formed between the front and rear panels 210 and 260. The partition wall 264 is formed to define a discharge space and to prevent cross talk between adjacent discharge cells.

The partition wall 264 is arranged in a direction parallel to the address electrode 262 (the X direction of the substrate) and in a direction parallel to the address electrode 262 (the Y direction of the substrate). And includes a second partition wall 264b. The first partition 264a is integrally extended to the adjacent second partition 264b in a direction facing each other to define a discharge space of a matrix type.

The barrier rib 264 is not limited to the above-described embodiment, and the barrier rib 264 is not limited to any one structure as long as it can partition the discharge space into an array pattern of pixels. Various embodiments, such as round or elliptical, may exist.

On the other hand, red, green, and blue phosphor layers 265 are coated for each discharge cell on the inner surface of the partition wall 264 and the inner surface of the back dielectric layer 263. The red, green, and blue phosphor layers 265 are made 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: is composed of Mn ^2+, phosphor layers of blue is BaMgAl ₁₀ O _17: Eu ²⁺ is preferably made of a.

Here, at least one igniter electrode 221, 222 serving as an auxiliary electrode capable of lowering a discharge start voltage is disposed in the discharge gap between the X and Y electrodes 213 and 214. At the same time, the electric field concentrator 218 is formed to improve the discharge efficiency.

In more detail, it is as following.

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

3 and 4, the X electrode 213 is disposed along a first transparent electrode line 213a extending across an adjacent discharge cell and one edge of the first transparent electrode line 213a. The first bus electrode line 213c is included. The first protrusion 213b protrudes from the first transparent electrode line 213a toward the center of the discharge cell.

The Y electrode 214 has a second transparent electrode line 214a disposed in a discharge cell facing the X electrode 214 and a second bus disposed along one edge of the second transparent electrode line 214a. The electrode line 214c is included. The second protrusion 214b protrudes from the second transparent electrode line 214a toward the center of the discharge cell.

In this case, a first igniter electrode 221 is electrically connected to the first transparent electrode line 213a, and a second igniter electrode 222 is electrically connected to the second transparent electrode line 214a. . The first and second igniter electrodes 221 and 222 serve as auxiliary electrodes, and are inserted to reduce discharge firing voltage by first initiating discharge.

The first igniter electrode 221 protrudes from the first transparent electrode line 213a toward the Y electrode 214 toward the center of the discharge cell, and the second igniter electrode 222 is the second transparent electrode line. It protrudes toward the X electrode 213 from 214a toward the center of the discharge cell.

The first igniter electrode 221 is disposed between the adjacent first protrusions 213b, and the second igniter electrode 222 is disposed between the adjacent second protrusions 214b. In this case, the first and second igniter electrodes 221 and 222 are disposed at positions corresponding to the second partition walls 264b arranged in the Y direction of the substrate.

The first and second igniter electrodes 221 and 222 have a substantially “T” shape drawn out from the first and second transparent electrode lines 213a and 214a to the center of the discharge cell. If it is a structure arranged in the center, it is not necessarily limited to the above shape. In addition, portions 221a and 222a of the first and second igniter electrodes 221 and 222 disposed at the center of the discharge cells extend across the adjacent discharge cells, respectively.

Meanwhile, at least one electric field concentrator 218 is formed between the X and Y electrodes 213 and 214 to lower the discharge start voltage. The electric field concentrator 218 has a kind of groove shape formed between the X and Y electrodes 213 and 214.

That is, the electric field concentrator 218 may be formed by adjusting the thickness of the front dielectric layer 217 filling the X and Y electrodes 213 and 214. The X and Y electrodes 213 and 214 may be formed. The thickness of the discharge gap between them is made thinner than the thickness of other parts. In the discharge gap between the X and Y electrodes 213 and 214, the first and second igniter electrodes 221 and 222 described above are electrically connected to the X and Y electrodes 213 and 214. Area.

The gap between the electric field concentrators 218 is formed to be narrower than the discharge gap between the X and Y electrodes 213 and 214. In this case, the electric field concentrator 218 may be formed in various forms, and are grooves continuously formed along the longitudinal direction in which the X and Y electrodes 213 and 214 are disposed, or the X and Y electrodes 213 ( It may be a discontinuous groove selectively formed only within the discharge cell in which 214 is disposed.

Thus, the gap thickness between the X and Y electrodes 213 and 214 due to the electric field concentrator 218 is smaller than the thickness of other regions in the discharge space between the X and Y electrodes 213 and 214. The stronger electric field effect is intended to increase the probability of active ionization of gas atoms.

As a result, the front dielectric layer 217 fills the X and Y electrodes 213 and 214 with the first front dielectric layer 221 which is filled with the first and second igniter electrodes 221 and 222 electrically connected thereto. 216 and a second front dielectric layer 216 formed on the first front dielectric layer 216 by making the thickness of the discharge gap between the X and Y electrodes 213 and 214 thinner than the thickness of the other portion. Doing.

A passivation layer 219 is formed on the surface of the second front dielectric layer 216 to increase secondary electron emission due to interaction of ions generated inside the front panel 210 with the surface.

Meanwhile, a discharge gas is injected into the combined discharge spaces of the front and rear panels 210 and 260, and the discharge gas includes neon (Ne) and high concentration xenon (Xe) gas of 10% by volume or more.

The operation of the plasma display panel 200 according to the exemplary embodiment of the present invention having the above configuration will be described below with reference to FIGS. 2 to 4.

First, when a predetermined address voltage is applied between the address electrode 262 and the Y electrode 214 from an external power source, a discharge cell to emit light is selected. Wall charges are accumulated on the Y electrode 214 of the selected discharge cell. At this time, the generated wall charge is charged in the electric field concentrator 218 formed in the discharge gap between the X and Y electrodes 213 and 214.

Subsequently, when a voltage of “+” is applied to the X electrode 213 and a voltage higher than this is applied to the Y electrode 214, the wall is caused by the voltage difference applied between the X and Y electrodes 213 and 214. The charge will move. The discharge start voltage for the sustain discharge can be lowered by the electric field concentrator 218 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 disposed in the discharge gap between the X electrode 213 and the Y electrode 214 in which a relatively strong electric field is formed. The first and second igniter electrodes 221 and 222 are generated first.

Subsequently, if the voltage difference between the X electrode 213 and the Y electrode 214 is still sufficiently large as time passes, the electric field formed between the two electrodes 213 and 214 is gradually concentrated so that the discharge is discharged. It spreads all over the canal.

If the voltage difference between the X and Y electrodes 213 and 214 is 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, when the polarities of the X and Y electrodes 213 and 214 are changed to each other, the initial discharge process is repeated. The discharge is stably generated while repeating this process.

At this time, the ultraviolet rays generated by the discharge excite the fluorescent material of the phosphor layer 265 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 such, the discharge begins in the discharge gap between the X and Y electrodes 213 and 214, so that the plasma density is concentrated around the discharge gap. In addition, plasma is diffused from the discharge gaps of the X and Y electrodes 213 and 214 to the outside of the electrodes 213 and 214 based on the high density of electrons and ions to form distribution of wall charges in all regions. I can do it.

As described above, the plasma display panel 200 in which the electric field concentrator 218 is formed has an electrode structure of a high-efficiency discharge cell by efficiently utilizing the outer portions of the X and Y electrodes 213 and 214. The discharge gap is discharged from the discharge gap between the Y electrodes 213 and 214 to the outside of the X and Y electrodes 213 and 214, thereby facilitating the generation of charged particles and excitation species, thereby improving efficiency. .

As described above, in the plasma display panel of the present invention, the following effects can be obtained by arranging a plurality of igniter electrodes in the discharge gap between the X and Y electrodes, and simultaneously shaping the electric field concentrator.

First, a low voltage sustain discharge voltage is possible.

The driving voltage is reduced because the voltage reduction at the electric field concentrator and the voltage reduction by the igniter electrode are simultaneously used.

Second, the luminous efficiency of the panel is improved.

Since the discharge start voltage can be reduced by forming a region where the electric field is concentrated in the discharge space of the panel, power consumption can be reduced.

Third, EMI can be lowered.

As the low voltage can be driven, EMI can be 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 (15)

A plurality of substrates having front and rear substrates disposed to face each other; An X electrode and an Y electrode alternately disposed on the front substrate; An igniter electrode disposed in the discharge gap between the X and Y electrodes, the igniter electrode having a first igniter electrode electrically connected to the X electrode and a second igniter electrode electrically connected to the Y electrode; A front dielectric layer containing the X electrode, the Y electrode, and an igniter electrode; A plurality of address electrodes arranged on the rear substrate in a direction crossing the X electrode and the Y electrode; A back dielectric layer filling the address electrode; A partition wall disposed between the front and rear substrates to define a discharge space; Red, green, and blue phosphor layers applied in the barrier ribs; And And an electric field concentrator formed between the X and Y electrodes. delete The method of claim 1, The X electrode has a first electrode line disposed in one direction of the substrate, and a first protrusion projecting into the discharge cell from the first electrode line toward the Y electrode, And the first igniter electrode is disposed between adjacent first protrusions and protrudes from the first electrode line toward the Y electrode. delete The method of claim 1, The Y electrode has a second electrode line disposed in one direction of the substrate, and a second protrusion projecting into the discharge cell from the second electrode line toward the X electrode, And the second igniter electrode is disposed between adjacent second protrusions and protrudes from the second electrode line toward the X electrode. delete The method of claim 3, wherein And the first igniter electrode is disposed at a portion where the portion drawn out from the first electrode line corresponds to a partition wall. The method according to claim 3 or 5, The igniter electrode is a plasma display panel, characterized in that the T-shaped (T) type. delete The method of claim 1, And wherein the electric field concentrator is formed by making the thickness of the front dielectric layer between the X and Y electrodes thinner than other portions. The method of claim 10, Wherein the distance between the electric field concentrators is smaller than the discharge gap between the X and Y electrodes. The method of claim 10, And the front dielectric layer comprises the X electrode, the Y electrode, a first front dielectric layer filling an igniter electrode, and a second front dielectric layer having the electric field concentrator formed on the first front dielectric layer. delete The method of claim 1 And a passivation layer is further formed on the surface of the front dielectric layer to increase secondary electron emission. The method of claim 5, And the second igniter electrode is disposed where a portion drawn out from the second electrode line corresponds to a partition wall.

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