KR20060040516A - Plasma display panel - Google Patents

Abstract

A plasma display panel is disclosed. The present invention includes a substrate disposed to face each other, and a plurality of discharge electrodes formed on the substrate and disposed in respective discharge cells, wherein the discharge electrodes are disposed to face each other in the discharge cells; And a plurality of first and second discharge electrodes are respectively separated in each discharge cell, thereby reducing the discharge interval between the discharge electrodes, thereby lowering the discharge voltage. Thereby, the stability of sustain discharge can be ensured.

Description

Plasma display panel {Plasma display panel}

1 is a cross-sectional view showing 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 an enlarged plan view of a state in which the discharge electrode of FIG. 2 is disposed;

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

5 is a plan view showing a discharge electrode according to a second embodiment of the present invention.

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

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

211 ... Front substrate 212 ... X electrode

213 Y electrode 214 Front dielectric layer

215 ... protective layer 261 ... back substrate

262 Address electrode 263 Backside dielectric layer

264 bulkhead 265 phosphor layer

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having an improved structure of a discharge electrode in order to induce stability of discharge.

Typically, a plasma display panel forms a plurality of discharge electrodes on opposite surfaces of a plurality of substrates, and discharges a predetermined power source to each discharge electrode while injecting discharge gas into a closed discharge space between the substrates. It refers to a flat display device (flat display device) to implement the image by using the light emitted by exciting the fluorescent material of the phosphor layer by the ultraviolet rays generated in the discharge space by applying a.

Referring to FIG. 1, a conventional plasma display panel 100 includes a front substrate 101, a rear substrate 102, and X and Y electrodes 103 alternately disposed on an inner surface of the front substrate 101 ( 104, the front dielectric layer 105 filling the X and Y electrodes 103 and 104, the protective film layer 106 formed on the surface of the front dielectric layer 105, and the inner surface of the back substrate 102. An address electrode 107 disposed, a back dielectric layer 108 filling the address electrode 107, a partition wall 109 disposed between the front and back substrates 101 and 102 to define a discharge space; And a red, green, and blue phosphor layer 110 applied to the inner surface of the partition 109.

A method of manufacturing the plasma display panel 100 is briefly described as follows.

In the case of the front panel, a front substrate 101 is provided, and the front dielectric layer 105 is printed to form X and Y electrodes 103 and 104 on the front substrate 101 and to embed them. Next, the protective film layer 106 is deposited on the surface of the front dielectric layer 105.

In the case of the back panel, a back substrate 102 is provided, the address electrode 107 is formed on the back substrate 102, and the back dielectric layer 108 is printed on the entire surface to fill the address electrode 107. . Subsequently, a partition wall 109 is formed on an upper surface of the rear dielectric layer 108, and the red, green, and blue phosphor layers 110 are coated inside the partition wall 109.

The front and rear panels completed through the above process are coated with frit glass along the edges of the front and rear substrates 101 and 102 in a state where they are aligned with each other and heat treated at an appropriate temperature. Sealed. Next, the evacuation is performed in a vacuum state to remove impurities such as moisture remaining between the enclosed panels.

Subsequently, a discharge gas containing xenon-neon (Xe-Ne) as a main component is enclosed, the panel assembly is separated from the exhaust device, a predetermined voltage is applied to the panel assembly, aging discharged, and an IC is completed. Done.

In this case, in order to stably drive the plasma display panel 100, it is somewhat advantageous to lower the discharge voltage, and the factor influencing this is the design of the discharge electrode.

Korean Patent Laid-Open No. 99-65408 discloses a technique for lowering a discharge voltage by designing an electrode protruding on a discharge electrode. However, if the tip of the discharge electrode is sharply designed to lower the discharge voltage, the discharge is locally generated and the probability of discharging of the discharge is reduced.

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 having an improved structure of a discharge electrode in order to lower the discharge start voltage between the discharge electrodes and to improve the light emission efficiency.

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

A plurality of substrates disposed to face each other; and

A plurality of discharge electrodes formed on the substrate and disposed in each discharge cell;

The discharge electrode has first and second discharge electrodes disposed to face each other in the discharge cell, and the first and second discharge electrodes are each separated into a plurality of discharge cells.

In addition, the first discharge electrode includes a first discharge electrode line disposed across an adjacent discharge cell, and a first protrusion protruding from the first discharge electrode line to a second discharge electrode,

The second discharge electrode has a second discharge electrode line disposed across the adjacent discharge cell, and a second protrusion projecting from the second discharge electrode line to the first discharge electrode,

The first and second protrusions are characterized in that a plurality of first and second ribs of different lengths are arranged to be spaced apart by a predetermined interval.

Further, the first and second ribs are arranged such that the discharge intervals between the first and second discharge electrodes are different from each other.

In addition, the first and second ribs of the portions disposed opposite to the outermost portion of each discharge cell are disposed relatively longer than the first and second ribs of the portions disposed facing the center.

Further, the first discharge electrode line has a first transparent electrode line, a first bus electrode line superimposed on the first transparent electrode line, the second discharge electrode line is a second transparent electrode line, A second bus electrode line superimposed on the second transparent electrode line,

The first protrusion is integrally extended from the first transparent electrode line, and the second protrusion is integrally extended from the second transparent electrode line.

In addition, the first discharge electrode line has a single layer of first bus electrode line, and the second discharge electrode line has a single layer of second bus electrode line,

The first protrusion may be electrically connected to the first bus electrode line, and the second protrusion may be electrically connected to the second bus electrode line.

Hereinafter, a plasma display panel according to an 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 to face the front panel 210.

The front panel 211 is provided on the front panel 210. The front substrate 211 is made of a transparent substrate such as soda lime glass. On the lower surface of the front substrate 211, X and Y electrodes 212 and 213 are alternately arranged in the discharge cell along the X direction of the substrate.

The X electrode 212 has a stripe-shaped first transparent electrode line 212a, a first protrusion 212b protruding from the first transparent electrode line 212a toward the Y electrode 213, and the first The first bus electrode line 212c is formed along one edge of the first transparent electrode line 212a.

The Y electrode 213 is similar to the X electrode 212 and has a second stripe-shaped transparent electrode line 213a and a second projecting through the X electrode 212 from the second transparent electrode line 213a. The protrusion 213b and the second bus electrode line 213c formed along one edge of the second transparent electrode line 213a are included.

The first and second transparent electrode lines 212a and 213a and the first and second protrusions 212a and 212b are each made of a transparent conductive film such as an indium tin oxide film. The first and second bus electrode lines 212c and 213c may be made of a material having high conductivity, such as silver paste, to reduce the electrical resistance of the first and second transparent electrode lines 212a and 213a. desirable.

The X and Y electrodes 212 and 213 are embedded by the front dielectric layer 214. The front dielectric layer 214 may be selectively printed only on a portion where the X and Y electrodes 212 and 213 are disposed, or may be printed on the entire area of the front substrate 211. A passivation layer 215 such as magnesium oxide (MgO) is deposited on the front surface of the front dielectric layer 214.

The back panel 261 is provided with the back panel 260. The rear substrate 261 is disposed in parallel with the front substrate 211. Like the front substrate 211, the back substrate 261 is made of a transparent substrate such as soda lime glass.

On the rear substrate 261, a stripe address electrode 262 is disposed along the Y direction of the substrate. The address electrode 262 is disposed in a direction crossing the X and Y electrodes 212 and 213. The address electrode 262 extends across an adjacent discharge cell. The address electrode 262 is embedded by the back dielectric layer 263.

A partition wall 264 is disposed between the front and rear panels 210 and 260 to partition a discharge space and prevent cross-talk between adjacent discharge cells. The partition wall 264 includes a first partition wall 264a disposed along the X direction of the substrate and a second partition wall 264b disposed along the Y direction of the substrate. The first partition wall 264a extends in an opposite direction from the inner side of the second partition wall 264b disposed adjacent to each other, and the first and second partition walls 264a and 264b form a matrix when combined. Is fulfilling.

Alternatively, the partition wall 264 may have various types of embodiments such as a meander type, a delta type, a honeycomb type, and the like, and thus, the partitioned discharge cell may have a rectangular shape. In addition to this, it is not limited to any one of polygonal, circular, elliptical, etc. shapes.

The phosphor layer 265 of red, green, and blue is coated on each of the discharge cells inside the partition 264, and the phosphor layer 265 may be applied to any area of the discharge cell. In the case, the barrier rib 264 is applied to the inner side.

The phosphor layer 265 is coated for each discharge cell. The red phosphor layer consists of (Y, Gd) BO ₃ ; Eu ⁺³ , the green phosphor layer consists of Zn ₂ SiO ₄ : Mn ²⁺ , and the blue phosphor layer is BaMgAl ₁₀ O ₁₇ : Eu ²⁺ It is preferable that it consists of.

The plasma display panel 200 having the above structure selects a discharge cell by applying an electrical signal to the Y electrode 213 and the address electrode 262, and alternately applies the electrical signals to the X and Y electrodes 212 and 213. When a signal is applied, surface discharge occurs from the surface of the front panel 210 to generate ultraviolet rays, and visible light is emitted from the phosphor layer 265 of the selected discharge cell to implement a still image or a moving image.

Here, the X and Y electrodes 212 and 213 are disposed to face each other in each discharge cell, and are separated into a plurality of in each discharge cell.

More detailed description is as follows.

3 illustrates a state in which discharge electrodes disposed on a substrate are disposed, and FIG. 4 illustrates an enlarged view of the discharge electrodes of FIG. 3 separately.

3 and 4, the substrate 300 may include a display area 301 for displaying an image by applying a predetermined discharge voltage to the first and second discharge electrodes 310 and 320. The first and second discharge electrodes 310 and 320 may be divided into a non display area 302 electrically connected to an external terminal.

The first and second discharge electrodes 310 and 320 refer to the X and Y electrodes which cause the sustain discharge in the case of the three-electrode surface discharge plasma display panel described above, but the surface discharge type, the counter discharge type, and the direct current. The shape, structure, and the like of the panel such as a mold, an alternating current type, and a hybrid type are not limited thereto. In the case of a three-electrode surface discharge plasma display panel, a third discharge electrode 330 may be further provided to generate addressing discharge in a direction crossing the first and second discharge electrodes 310 and 320.

The first and second discharge electrodes 310 and 320 are disposed in respective discharge cells due to the partition wall 340 which is disposed in a matrix form on the substrate 300 and partitions the discharge space.

That is, the first discharge electrode 310 and the second discharge electrode 320 extend from the display area 301 to the non-display area 302, respectively. In addition, the first and second discharge electrodes 310 and 320 are disposed in pairs in the discharge cells partitioned by the partition walls 340 and are disposed to face each other.

The first discharge electrode 310 connects the first discharge electrode line 311 disposed across the adjacent discharge cells and the second discharge electrode 320 for each discharge cell from the first discharge electrode line 311. It has a first projection 312 protruding toward. The first discharge electrode line 311 is striped.

Similarly to the first discharge electrode 310, the second discharge electrode 320 also has a stripe-shaped second discharge electrode line 321 disposed across the adjacent discharge cell and the second discharge electrode line 321. Each discharge cell is provided with a second protrusion 322 toward the first discharge electrode 310. The second protrusion 322 is spaced apart from the first protrusion 321 by a predetermined interval so that the first and second discharge electrodes 310 and 320 are electrically separated from each other.

In this case, the first protrusion 312 is separated into a plurality of ribs having different lengths, and the second protrusion 322 is formed of a plurality of ribs having different lengths as well as the first protrusion 312. .

The first protrusion 312 is gradually longer in length from the rib 312a located at the center to the outermost rib 312b in the discharge cell, and the second protrusion 322 is also disposed as the first protrusion 312. The rib 322a at a position corresponding to the rib 312a positioned at the center of the protrusion 312 has the shortest length, and the rib at a position corresponding to the rib 312b positioned at the outermost portion of the second protrusion 312. 322b) is arranged longest.

Accordingly, the discharge interval between the first and second protrusions 312 and 322 in the discharge cell is farthest from the center and disposed closer to the outermost portion due to the difference in the relative lengths of the ribs 312a to 322b. Structure.

Meanwhile, the first discharge electrode line 311 has a double layer structure including a first transparent electrode line 311a and a first bus electrode line 311b overlapping the first transparent electrode line 311a. The second discharge electrode line 321 also has a double layer structure including a second transparent electrode line 321a and a second bus electrode line 322b superimposed on the second transparent electrode line 321a.

In addition, the first protrusion 312 may be formed of a plurality of ribs integrally extending from the inner side wall of the first transparent electrode line 311a toward the second discharge electrode line 320, and the second protrusion 322 may be formed. ) Extends integrally from the inner side wall of the second transparent electrode line 321a toward the first discharge electrode line 310.

Alternatively, the first discharge electrode line 311 may consist only of a single layer of first bus electrode line 311b, and the first protrusion 312 may be formed in each discharge cell without the first transparent electrode line 311a. The first bus electrode line 311b of the stripe shape may be electrically connected to the first protrusion 312 while extending across the adjacent discharge cell.

In addition, the second discharge electrode line 321 also includes only the second bus electrode line 321b without the second transparent electrode line 321a, and the second bus electrode line at one end of the second protrusion 322. 321b may be arranged in electrical connection.

In this case, the first and second bus electrode lines 311b and 321b may be arranged in a stripe shape along one direction of the substrate 300 to be electrically connected to the first and second protrusions 312 and 322. It is preferable to improve the electrical conductivity of the first and second transparent electrode lines 311a and 311b.

Accordingly, the first and second discharge electrodes 310 and 320 are disposed at the center of the discharge interval between the ribs 312b and 322b disposed at the outermost portions of the first and second protrusions 312 and 322. As the discharge interval between the ribs 312a and 322a becomes smaller, the discharge voltage can be lowered.

In addition, since the first and second protrusions 312 and 322 are composed of a plurality of ribs, the applied discharge current can be reduced, thereby lowering the luminous efficiency.

5 illustrates a discharge electrode according to a second embodiment of the present invention.

Referring to the drawings, red, green, and blue phosphor layers 540 are applied to each discharge cell in the discharge space partitioned by the partition wall 540. The first discharge electrode 510 and the second discharge electrode 520 are disposed to face each other on the partition wall 540.

The first discharge electrode 510 may include a first discharge electrode line 511 disposed on the partition wall 540 and a first protrusion 512 disposed in the discharge cell from the first discharge electrode line 511. It is included. The second discharge electrode 520 is formed from the second discharge electrode line 521 and the second discharge electrode line 521 disposed on the partition wall 540 opposite to the first discharge electrode 510. And a second protrusion 522 disposed in the discharge cell.

The first discharge electrode line 511 may include a first transparent electrode line 511a integrally connected to the first protrusion 512 and a first bus disposed along one edge of the first transparent electrode line 511a. An electrode line 511b, and the second discharge electrode line 521 also includes a second transparent electrode line 521a electrically connected to the second protrusion 522 and the second transparent electrode line 521a. A second bus electrode line 521b is disposed along one edge.

The first and second bus electrode lines 511b and 521b are arranged on the partition wall 540 in order to prevent a phenomenon in which the bus electrode lines made of an opaque conductive material reduce the opening ratio of the panel.

In addition, the first protrusion 512 has a rib 512b disposed at the outermost portion of the first protrusion 512 relatively longer than the rib 512a positioned at the center thereof, and the second protrusion 522 also has a rib 522a positioned at the center thereof. Is relatively far from the first protrusion 512, and the outermost rib 522b is relatively close to the first protrusion 512.

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

First, it is possible to reduce the discharge voltage by reducing the discharge interval between the discharge electrodes. Thereby, the stability of sustain discharge can be ensured.

Second, since the discharge electrode includes a plurality of ribs of different lengths, unnecessary discharge current can be suppressed to increase luminous efficiency.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (9)

A plurality of substrates disposed to face each other; and A plurality of discharge electrodes formed on the substrate and disposed in each discharge cell; And the discharge electrodes have first and second discharge electrodes disposed to face each other in the discharge cells, and the first and second discharge electrodes are separated into a plurality of discharge cells, respectively. The method of claim 1, The first discharge electrode includes a first discharge electrode line disposed across an adjacent discharge cell and a first protrusion protruding from the first discharge electrode line to a second discharge electrode, The second discharge electrode includes a second discharge electrode line disposed across an adjacent discharge cell, and a second protrusion projecting from the second discharge electrode line to the first discharge electrode, And the first and second protrusions are arranged such that a plurality of first and second ribs having different lengths are spaced apart from each other by a predetermined interval. The method of claim 2, And the first and second ribs are arranged such that discharge intervals between the first and second discharge electrodes are different from each other. The method of claim 2, And the first and second ribs of the portion disposed opposite to the outermost portion of each discharge cell are disposed relatively longer than the first and second ribs of the portion disposed opposite to the center. The method of claim 2, The first discharge electrode line includes a first transparent electrode line, a first bus electrode line superimposed on the first transparent electrode line, the second discharge electrode line is a second transparent electrode line, and the second A second bus electrode line superimposed on the transparent electrode line, And the first protrusion is integrally extended from the first transparent electrode line, and the second protrusion is integrally extended from the second transparent electrode line. The method of claim 2, The first discharge electrode line includes a single layer first bus electrode line, the second discharge electrode line includes a single layer second bus electrode line, And the first protrusion is electrically connected to the first bus electrode line, and the second protrusion is electrically connected to the second bus electrode line. The method of claim 2, And the first and second discharge electrode lines are arranged in a stripe shape along one direction of the substrate. The method of claim 2, And the first and second protrusions are formed of a transparent conductive film. The method of claim 2, And the first and second discharge electrode lines are disposed on a partition wall partitioning a discharge space, and the first and second protrusions are disposed in a discharge cell.

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