KR20060003640A - Plasma display panel with multi-electrodes having different distance - Google Patents

Abstract

Disclosed is a plasma display panel having different spacing between multi-electrodes. The present invention provides a front panel comprising a front substrate, an X and Y electrode, an M electrode disposed between the X and Y electrodes, and a front dielectric layer filling the front panel; a rear substrate disposed to face the front substrate; A rear panel having an address electrode disposed in a direction intersecting the X, Y and M electrodes, and a rear dielectric layer embedded therein; a partition wall disposed between the front and rear panels to define a discharge cell; Wherein the red, green, and blue phosphor layers are formed, wherein the X, Y, and M electrodes are formed to have a larger distance between the electrodes in the non-display area at the edge of the substrate than the distance between the electrodes in the display area for implementing the image. Neon discharge in the non-display area is prevented in the sustain discharge period by forming a relatively wider distance between the X, Y, and M electrodes located in the non-display area than the distance between the X, Y, and M electrodes located in the display area. It prevents the year. Thereby, the image quality can be improved.

Description

Plasma display panel with multi-electrode spacing

1 is a perspective view showing a part of the structure of a conventional discharge electrode,

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 block diagram of a plasma display device according to an embodiment of the present invention;

4 is a perspective view showing an electrode of a discharge cell according to the first embodiment of the present invention;

5 is a perspective view showing an electrode of a discharge cell according to a second embodiment of the present invention;

6 is a perspective view showing an electrode of a discharge cell according to a third embodiment of the present invention;

7 is a perspective view showing an electrode of a discharge cell according to a fourth embodiment of the present invention;

8 is a waveform diagram of signals applied to the electrode line of FIG. 2;

9 to 14 illustrate changes in the wall charge distribution of FIG. 8.

FIG. 9 is a cross-sectional view showing a change in the wall charge distribution of discharge cells at t ₁ to t ₂ hours in FIG. 8;

FIG. 10 is a cross-sectional view showing a change in wall charge distribution of discharge cells at t ₂ to t ₃ time of FIG. 8;

FIG. 11 is a cross-sectional view illustrating a change in wall charge distribution of discharge cells at t ₃ to t ₄ hours in FIG. 8;

12 is a cross-sectional view showing a change in wall charge distribution of discharge cells at t ₅ to t ₆ hours in FIG. 8;

FIG. 13 is a cross-sectional view showing a change in wall charge distribution of discharge cells at t ₇ to t ₈ hours in FIG. 8;

FIG. 14 is a cross-sectional view illustrating wall charge distribution changes of discharge cells at t ₈ to t ₁₂ hours in FIG. 8.

<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 ... bus electrode

215 ... M electrode 216 ... front dielectric layer

Front dielectric layer 260 Rear panel

261 Back panel 262 Address electrode

263 back dielectric layer 264 bulkhead

267 phosphor layer

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel in which a multi-electrode spacing that prevents erroneous discharge in a non-display area is prevented by changing a distance between electrodes in a display area and a non-display area. will be.

Typically, a plasma display panel injects and discharges a discharge gas on two substrates having a plurality of electrodes, and then applies a discharge voltage. When the gas emits light between the electrodes due to the discharge voltage, an appropriate pulse voltage is applied. It refers to a flat panel display that is applied to address a point where two electrodes intersect to implement a desired number, letter or graphic.

Such a 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.

On the other hand, in the opposite discharge type plasma display panel, an address electrode and a scan electrode are provided to face each unit 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 electrode corresponding to each unit pixel are provided to generate addressing discharge and sustain discharge.

1 shows a plasma display panel 100 disclosed in Japanese Patent Laid-Open No. 4-56039.

Referring to the drawings, the plasma display panel 100 has a plurality of pairs of pairs of discharging electrodes 120 that determine the discharging cells for emitting light on the inner surface of the glass substrate 110 on the display side in parallel to each other in the X direction. On the inner surface of the glass substrate on the rear side, which is not shown, an address electrode for selecting dots to emit light is arranged.

In the outer edge portion of the glass substrate 110, a terminal portion 130 in which the discharging electrode 120 is enlarged is connected to the driving circuit. The discharging electrode 120 includes a strip-shaped transparent electrode 140 and a bus electrode 150 overlapping the transparent electrode 140 in the extending direction. The bus electrode 150 protrudes in the X direction with respect to the transparent electrode 140, and the protruding portion includes the terminal portion 110 and is formed directly on the glass substrate 110.

Recently, a multi-electrode plasma display panel is being developed in which long gap discharge is generated between the discharge electrodes 130 by interposing separate electrodes between the plurality of discharge electrodes 130 to increase luminance. Since the multi-electrodes are maintained at the same distance from each other, there is a fear of neon discharge in the non-display area in the sustain discharge period.

The present invention is to solve the above problems, the gap between the multi-electrode in the display area and the non-display area is formed differently so that the gap of the multi-electrode to prevent the neon discharge is generated in the non-display area is formed differently It is an object to provide a plasma display panel.

In order to achieve the above object, a plasma display panel having a different spacing between multi-electrodes according to an aspect of the present invention is provided.

A front panel comprising a front substrate, an X and Y electrode formed on an inner surface thereof, an M electrode disposed between the X and Y electrodes in a unit discharge cell, and a front dielectric layer embedded therein;

A rear panel having a rear substrate disposed to face the front substrate, an address electrode formed on an inner surface thereof and disposed in a direction crossing the X, Y and M electrodes, and a rear dielectric layer embedded therein;

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

It includes; red, green, blue phosphor layer applied in the partition wall,

The X, Y, and M electrodes are characterized in that the gap between the electrodes in the non-display area toward the substrate edge is wider than the gap between the electrodes in the display area for implementing the image.                     

In addition, the X, Y and M electrodes are each characterized in that it comprises a transparent electrode and a bus electrode superimposed on the transparent electrode.

In addition, the width of the transparent electrode is characterized in that formed wider than the width of the bus electrode.

Further, the X, Y, and M electrodes each extend integrally with the bus electrode in a non-display area, and include terminal portions formed wider than the bus electrode.

In addition, the X electrode and the Y or M electrode is characterized in that the terminal portion is formed in the opposite direction of the substrate.

In addition, the X electrode and the M electrode are formed in a wider gap in the non-display area than the gap in the display area because the transparent electrode for the X electrode and the transparent electrode for the M electrode is formed narrower than the display area. It features.

In addition, the widths of the terminal portions integrally connected to the bus electrodes in the non-display area are formed to have the same width as those of the bus electrodes in the display area, and the transparent electrode for the X electrode and the transparent electrode for the M electrode are The gap in the non-display area is wider than that in the display area by being narrower in the non-display area than in the display area.

In addition, the widths of the terminal portions integrally connected to the bus electrodes in the non-display area are formed to have the same width as those of the bus electrodes in the display area, and the transparent electrode for the X electrode and the transparent electrode for the M electrode are Since the non-display area is not formed, the gap in the non-display area is wider than that in the display area.

In addition, the widths of the terminal portions integrally connected to the bus electrodes in the non-display area are formed to have the same width as that of the bus electrodes in the display area. The gap in the non-display area is wider than the gap in the display area because it is not formed in the non-display area corresponding to.

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 four-electrode surface discharge 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 back panel 260 coupled to the front panel 210.

The front panel 210 is provided with a transparent substrate, for example, a front substrate 211 such as soda lime glass. X and Y electrodes 212 and 213 are patterned on the inner surface of the front substrate 211. The X and Y electrodes 212 and 213 are arranged in a strip shape along the X direction. The pair of X and Y electrodes 212 and 213 are disposed to face each other in the unit discharge cell S. As shown in FIG. Bus electrodes 214 are formed on lower surfaces of the X and Y electrodes 212 and 213.

An M electrode 215 is disposed between the pair of X and Y electrodes 212 and 213 to induce their long gap discharge. The M electrodes 215 are strips arranged in substantially the same direction as the X and Y electrodes 212 and 213, and different voltages are applied thereto. The bus electrode 214 is also electrically connected to the bottom surface of the M electrode 215.

The X and Y electrodes 212 and 213 and the M electrode 215 are preferably transparent electrodes, for example, an indium tin oxide (ITO) film, and the bus electrode 214 is a material having excellent conductivity, such as silver paste (Ag). paste or a multiple metal film of chromium-copper-chromium (Cr-Cu-Cr) is suitable.

Alternatively, the shape of the X and Y electrodes 212 and 213, the bus electrode 214, and the M electrode 215, or the structure disposed in the discharge cell may be arranged in each unit discharge cell so that a gap between the electrodes ( If the discharge can be generated from the gap), it is not limited to any one shape or disposed structure.

The X and Y electrodes 212 and 213 and the M electrode 215 are embedded by the front dielectric layer 216. The front dielectric layer 216 is applied over the front substrate 211 using a transparent dielectric material such as PbO-B ₂ O ₃ -SiO ₂ . Alternatively, the front dielectric layer 216 may be selectively applied only to specific portions including the X and Y electrodes 212 and 213, the bus electrode 214, the M electrode 215, and the like. Could be

A passivation layer 217 made of magnesium oxide (MgO) is formed on the surface of the front dielectric layer 216 to increase secondary electron emission. The passivation layer 217 is coated on the entire surface of the front dielectric layer 216.

The back panel 260 is provided with a back substrate 261 made of a transparent glass substrate, for example, soda lime glass. The rear substrate 261 is disposed to face the front substrate 211.

An address electrode 262 is formed on the inner surface of the back substrate 261. The address electrode 262 is formed of a plurality of strips and is disposed in parallel with the Y direction of the back substrate 261 which is a direction crossing the X and Y electrodes 212 and 213 and the M electrode 215. have. The address electrode 262 extends across discharge cells disposed adjacent to the Y direction and is spaced apart from each other in a direction parallel to the X direction. The address electrode 262 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 216.

The partition wall 264 is disposed between the front and rear panels 210 and 260. The partition wall 264 includes a horizontal partition wall 265 disposed in a direction orthogonal to a direction in which the address electrode 262 is disposed, and a vertical partition wall 266 disposed in a direction parallel to the address electrode 262. .

The horizontal partition wall 265 is disposed in a strip shape along the X direction of the rear substrate 261, and the vertical partition wall 266 extends in an opposite direction from an inner side wall of the pair of adjacent horizontal partition walls 265 to discharge It limits space.

The horizontal and vertical bulkheads 265 and 266 are integrally coupled to each other, and the partitioned discharge space has a substantially rectangular shape. Alternatively, the partition wall 264 may be manufactured in various shapes such as a waffle type, meander type, or delta type, and the discharge space may also be circular, triangular, or hexagonal. It will be said that various embodiments exist.

On the other hand, red, green, and blue phosphor layers 267 are coated on the inner walls of the barrier ribs 266 and the upper surface of the back dielectric layer 263. The front and back panels 210 and 260 are coated with discharge cells. A discharge gas of neon (Ne) -xenon (Xe) is injected into the discharge space defined by the and barrier ribs 264.

3 is a block diagram of a plasma display device 300 including the plasma display panel 200 of FIG. 2.

Referring to the drawings, the plasma display device 300 includes a plasma display panel 200, an image processor 201, a logic controller 202, an address driver 203, an X driver 204, a Y driver 205, and the like. The M drive unit 206 is included.

The image processor 201 processes an external image signal to generate an internal image signal including red, green, and blue digital image data, a clock signal, and vertical and horizontal synchronization signals. The logic controller 202 generates drive-control signals S _M , S _A , S _X , S _Y in accordance with an internal image signal from the image processor 201.

The address driver 203 processes the address signals S _A from the logic controller 202 to generate display data signals, and transmits the generated display data signals to the address electrode lines A ₁ , ... Am. Is authorized.

The drive M 206 M driven from the logic controller (202) operates in accordance with a control signal (S _M) M electrode lines and drives the _{(M 1, ..., M n} ). X driver 204, an X driver from the logic controller (202) to operate in accordance with control signals (S _X) and drives the X electrode lines _{(X 1, ..., X m} ). The Y driver 205 operates in accordance with the Y drive-control signal S _Y from the logic controller 202 to drive the Y electrode lines Y ₁ ,..., Y _n .

At this time, scanning pulses are sequentially applied to each of the M electrode lines M ₁ ,..., And M _n and data addressing is applied to the address electrode lines selected from among the address electrode lines A ₁ , ... Am. This is done.

Next, between all X electrode lines (X ₁ , ..., X _n ) and all Y electrode lines (Y ₁ , ..., Y _n ) so that the discharge cells selected by addressing cause display-holding discharges. AC voltage is applied.

Accordingly, all X and Y electrode line pairs (X ₁ Y ₁ , X ₂ Y ₂ ,..., X _n Y _n ) and all Y and X electrode line pairs (Y ₁ X ₂ , Y ₂ X ₃ ,. ..., Y _{n -1} X _n ), the discharge cells can be set.

Further, by the addressing, a wall charge state necessary for display-holding discharge is formed for both the X and Y electrodes of the selected discharge cell, and at least one of the X- and Y electrodes of the unselected discharge cell is required for display-holding discharge. No wall charge is formed. For example, in four M electrode lines arranged in series, if there are two unselected discharge cells between two selected discharge cells, display-maintained discharge at either of the X and Y electrodes of each of the two unselected discharge cells. The wall charge state necessary for Therefore, while the discharge cells are set by all the X and Y electrode lines and all the Y and X electrode lines, a progressive driving method can be applied.

4 illustrates structures of electrodes in the display area and the non-display area according to the first embodiment of the present invention.

In this case, the display area refers to an area for implementing an image, and the non-display area refers to an area formed for terminal connection with an external circuit board along the edge of the substrate.

Referring to FIG. 4, the X electrode 412 and the Y electrode 413 are disposed in one direction on the front substrate 411. The M electrode 414 is disposed between the X and Y electrodes 413. The X and Y electrodes 412 and 413 and the M electrode 414 are all strip-shaped, with three electrodes arranged side by side in a single discharge cell.

The X electrode 412 includes a transparent electrode 415 for the X electrode formed on a surface of the front substrate 411, and a bus electrode 416 for the X electrode electrically connected to the transparent electrode 415. The bus electrode 416 for the X electrode is formed along the longitudinal direction of the transparent electrode 415 for the X electrode and extends from the display area to the non-display area, and is enlarged in the non-display area for smooth connection with external terminals. The terminal portion 417 for the X electrode is formed. The X electrode terminal portion 417 is integrally formed with the X electrode bus electrode 416.

The Y electrode 413 includes a Y electrode transparent electrode 418 formed on the surface of the front substrate 411, and a Y electrode bus electrode 419 electrically connected to the Y electrode transparent electrode 418. have. The Y electrode bus electrode 419 overlaps the transparent electrode 418 for the Y electrode in a portion of the display area and the non-display area, and an enlarged Y electrode terminal portion 420 is connected in the non-display area. . The Y electrode terminal portion 420 is disposed in a different direction from the X electrode terminal portion 417 on the front substrate 411.

The M electrode 414 is an M electrode transparent electrode 421 formed on a surface of the front substrate 411, and an M electrode bus electrode 422 electrically connected to and overlapping the M electrode transparent electrode 421. ) Is included. The bus electrode 422 for the M electrode is connected to the terminal portion 423 for the M electrode enlarged in the non-display area. The M electrode terminal portion 423 is disposed in the same direction as the Y electrode terminal portion 420 and is disposed in a direction different from that of the X electrode terminal portion 417.

In this case, the distance B between the X electrode 412 and the M electrode 414 in the display area and the distance A between the X electrode 412 and the M electrode 414 in the non-display area are different from each other. have.

That is, the width W ₃ of the transparent electrode 415 for the X electrode in the display area is formed wider than the width W ₂ of the bus electrode 416 for the X electrode. In addition, the width W ₂ of the X electrode bus electrode 416 extends integrally therewith to be narrower than the width W ₁ of the X electrode terminal portion 417 formed in the non-display area. The X electrode transparent electrode 415 is not formed in the non-display area. Alternatively, the transparent electrode 415 for the X electrode may overlap with the width smaller than the terminal portion 417 for the X electrode in the non-display area.

In addition, the width W ₆ of the M electrode transparent electrode 421 in the display area is wider than the width W ₅ of the M electrode bus electrode 422. The width W ₅ of the M electrode bus electrode 422 is formed in the non-display area, and is narrower than the width W ₄ of the M electrode terminal portion 423 disposed opposite the X electrode terminal portion 417. Formed. The width W ₇ of the non-display area is formed to be narrower than the width W ₆ of the display area at a portion corresponding to the X electrode terminal part 417.

The interval B between the X electrode 412 and the M electrode 414 in the display area, that is, the distance B between the transparent electrode 415 for the X electrode and the transparent electrode 421 for the M electrode is higher than the interval B. FIG. The gap A between the X electrode 412 and the M electrode 414 in the display area, that is, the gap B between the X electrode terminal portion 417 and the M electrode transparent electrode 422 is narrowly formed. .

As the transparent electrodes 416 and 421 for the X and M electrodes are reduced or not formed in the non-display area, the distances between the transparent electrodes 416 and 412 for the X and M electrodes are different from each other. Formed.

As such, as the gap between the X and M electrodes 412 and 414 increases in the non-display area, a phenomenon in which neon discharge occurs may be reduced.

Table 1 measures the occurrence of neon discharge in the non-display area according to the applicant's experiment.

TABLE 1

B (μm) 85 A (μm) 85 87.5 90 92.5 95 97.5 100 The number of false discharge 3 3 One 0 0 0 0

Here, A is a change in the spacing between the X and M electrodes 412 and 414 in the non-display area, B is a spacing between the X and M electrodes 412 and 414 in the display area, and the number of false discharges is This is the number of discharge cells in which erroneous discharge occurred in the display area.

Referring to Table 1, the distance B between the X and M electrodes 412 and 414 in the display area is fixed at 85 micrometers, and the distance between the X and M electrodes 412 and 414 in the non-display area. When (A) was changed to 85, 87.5, 90, 92.5, 95, 97.5, and 100 micrometers, the number of false discharges was 3, 3, 1, 0, 0, 0, 0.

That is, as the distance A between the X and M electrodes 412 and 414 in the non-display area is wider than the distance B between the X and M electrodes 412 and 414 in the display area, no misdischarge occurs. You can see that.

5 illustrates structures of electrodes in a display area and a non-display area according to a second embodiment of the present invention.

Referring to FIG. 5, X and Y electrodes 512 and 513 and a M electrode 514 are formed in a region corresponding to a unit discharge cell on the front substrate 511.

In this embodiment, the distance between the X and M electrodes 512 and 514 is formed differently in the display area and the non-display area, and the width of the electrode terminal portion in the non-display area and the width of the bus electrode in the display area are the same. It is.

That is, the X electrode bus electrode 516 overlaps the X electrode transparent electrode 515 in the display area, and the X electrode bus electrode 516 is the X electrode terminal portion 517 in the non-display area. Connected with The width W ₁₀ of the transparent electrode 515 for the X electrode is formed to have a narrower width W ₁₁ in the non-display area. The width W ₉ of the bus electrode 516 for the X electrode is substantially the same as the width W ₈ of the terminal portion 517 for the X electrode.

The M electrode bus electrode 522 is superimposed on the M electrode transparent electrode 521 in the display area, and the M electrode bus electrode 522 is the M electrode terminal part 523 in the non-display area. Connected with The width W ₁₄ of the transparent electrode 521 for the M electrode is formed to have a smaller width W ₁₅ in the non-display area. The width W ₁₃ of the M electrode bus electrode 522 is substantially the same as the width W _{12 of the} M electrode terminal part 523, and the M electrode terminal part 523 is the X electrode terminal part 517. Is formed on the opposite side.

On the other hand, the Y electrode 513 is a Y electrode transparent electrode 518, the Y electrode bus electrode 519 superimposed on the upper surface, and the Y electrode terminal portion 520 connected to the Y electrode bus electrode 519 ) And are positioned in substantially the same shape in the same direction as the M electrode 514.

In this case, the distance C between the X and M electrodes 512 and 514 in the non-display area, that is, the transparent electrode 515 for the X electrode in the non-display area and the transparent electrode for the M electrode at a position corresponding thereto ( The interval C of the 521 is the interval D of the X and M electrodes 512 and 514 in the display area, that is, the transparent electrode 515 for the X electrode and the transparent electrode 521 for the M electrode in the display area. It is formed wider than the space | interval D of ().

Table 2 measures the occurrence of neon discharge in the non-display area according to the applicant's experiment.

TABLE 2

D (μm) 85 C (μm) 85 87.5 90 92.5 95 97.5 100 The number of false discharge 3 One 0 0 0 0 0

Where C is a change in the spacing between the X and M electrodes 512 and 514 in the non-display area, D is a spacing between the X and M electrodes 512 and 514 in the display area, and the number of false discharges is This is the number of discharge cells in which erroneous discharge occurred in the display area.

Referring to Table 2, the distance D between the X and M electrodes 512 and 514 in the display area is fixed at 85 micrometers, and the distance between the X and M electrodes 512 and 514 in the non-display area. When (C) was changed to 85, 87.5, 90, 92.5, 95, 97.5, and 100 micrometers, the number of false discharges was 3, 1, 0, 0, 0, 0, 0.

That is, as the distance C between the X and M electrodes 512 and 514 in the non-display area is wider than the distance D between the X and M electrodes 512 and 514 in the display area, no misdischarge occurs. It can be seen that.

6 illustrates structures of electrodes in a display area and a non-display area according to a third embodiment of the present invention.

Referring to the drawings, on the front substrate 611, X and Y electrodes 612 and 613 are formed in the unit discharge cell, and an M electrode 614 is formed therebetween.

In this embodiment, the distance between the X and M electrodes 612 and 614 is formed differently in the display area and the non-display area, and the width of the bus electrode in the display area and the width of the electrode terminal part in the non-display area are the same. The transparent electrode in the non-display area is not formed.

That is, the X electrode bus electrode 616 overlaps the X electrode transparent electrode 615 in the display area, and the X electrode bus electrode 616 is the X electrode terminal portion 617 in the non-display area. Connected with The width W ₁₇ of the bus electrode 616 for the X electrode is substantially the same as the width W ₁₆ of the terminal portion 617 for the X electrode. In addition, the transparent electrode 615 for X electrodes is not formed in the non-display area.

The M electrode bus electrode 622 overlaps the M electrode bus electrode 622 on the M electrode transparent electrode 621 in the display area, and the M electrode bus electrode 622 is the M electrode terminal part 623 in the non-display area. Connected with The width W ₂₀ of the M electrode bus electrode 622 is substantially the same as the width W _{19 of the} M electrode terminal portion 623, and the M electrode terminal portion 623 is the X electrode terminal portion 617. Is formed on the opposite side. In addition, the M electrode transparent electrode 621 is not formed in the non-display area.

On the other hand, the Y electrode 613 is a transparent electrode 618 for the Y electrode, the Y electrode bus electrode 619 superimposed on the upper surface thereof, and the Y electrode terminal portion 620 connected to the Y electrode bus electrode 619. ) And are positioned in substantially the same shape in the same direction as the M electrode 614.

Here, the interval F between the X and M electrodes 612 and 614 in the non-display area, that is, the terminal portion 617 for the X electrode in the non-display area and the bus electrode 622 for the M electrode in the corresponding area. The distance F between the X and M electrodes 612 and 614 in the display area is defined as the distance E, that is, the transparent electrode 615 for the X electrode and the transparent electrode 621 for the M electrode in the display area. It is formed wider than the space | interval E of.

Table 3 measures the occurrence of neon discharge in the non-display area according to the experiment of the applicant.

TABLE 3

E (μm) 85 F (μm) 85 87.5 90 92.5 95 97.5 100 The number of false discharge 3 One 0 0 0 0 0

Where F is a change in the spacing between the X and M electrodes 612 and 614 in the non-display area, E is a spacing between the X and M electrodes 612 and 614 in the display area, and the number of false discharges is The number of discharge cells in which mis-discharge has occurred in the display area.

Referring to Table 3, the spacing E between the X and M electrodes 612 and 614 in the display area is 85 micrometers, and the spacing between the X and M electrodes 612 and 614 in the non-display area ( When F) was changed to 85, 87.5, 90, 92.5, 95, 97.5, and 100 micrometers, the number of false discharges was 3, 1, 0, 0, 0, 0, 0. As described above, the wider the interval between the X and M electrodes 612 and 614 in the non-display area, the less the discharge.

7 illustrates structures of electrodes in the display area and the non-display area according to the fourth embodiment of the present invention.

Referring to the drawing, on the front substrate 711, X and Y electrodes 712 and 713 are formed in the unit discharge cell, and an M electrode 714 is formed therebetween.

In this embodiment, the distance between the X and M electrodes 712 and 714 is formed differently in the display area and the non-display area, and the width of the bus electrode in the display area and the width of the electrode terminal part in the non-display area are the same. In this case, the bus electrode and the transparent electrode in the non-display area are not formed at the same time.

That is, the X electrode bus electrode 716 overlaps the X electrode transparent electrode 715 in the display area, and the X electrode bus electrode 716 is the X electrode terminal part 717 in the non-display area. Connected with The width W ₂₄ of the bus electrode 716 for the X electrode is substantially the same as the width W ₂₃ of the terminal portion 717 for the X electrode. In addition, the transparent electrode 715 for X electrodes is not formed in the non-display area.

The M electrode bus electrode 722 overlaps the M electrode transparent electrode 721 in the display area, and the M electrode bus electrode 722 is the M electrode terminal part 723 in the non-display area. Connected with The width W ₂₇ of the M electrode bus electrode 722 is substantially the same as the width W _{26 of the} M electrode terminal portion 723, and the M electrode terminal portion 723 is the X electrode terminal portion 717. Is formed on the opposite side. In addition, the M electrode transparent electrode 721 and the bus electrode 722 are not formed in the non-display area where they correspond to the X electrode terminal portion 712.

Meanwhile, the Y electrode 713 has a transparent electrode 718 for the Y electrode, a bus electrode 719 for the Y electrode superimposed on the upper surface thereof, and a terminal part 720 for the Y electrode connected to the bus electrode 719 for the Y electrode. ) Is positioned in substantially the same shape in the same direction as the M electrode 714.

At this time, the interval G between the X and M electrodes 712 and 714 in the non-display area, that is, the interval G between the terminal portion 717 for the X electrode and the M electrode 714 in the non-display area is displayed. The X and M electrodes 712 and 714 in the region, that is, are formed wider than the interval H between the X electrode transparent electrode 715 and the M electrode transparent electrode 721 in the display region.

FIG. 8 illustrates a signal applied to an electrode line of the plasma display panel 20 of FIG. 3, and FIGS. 9 to 14 illustrate changes in wall charge distribution of unit discharge cells at t ₁ to t ₁₂ hours in FIG. 8. will be.

Referring to Figure 8, the unit sub immediately before the end time (t ₁₂₎ of the field, the final display-sustain pulse is therefore applied to all the X electrode lines, any of units (t ₁₂₎ end point in the sub-field that is, units of the sub-fields At the initial time point t ₁ of the unit subfield following, negative wall charges are formed around the X electrode of the discharge cells selected in the previous subfield, and positive polarities are formed around the Y electrode of the discharge cells selected in the previous subfield. Wall charges are formed.

8 and 9, in the wall charge erase time t ₁ to t ₂ of the resetting time R of the unit subfield, all pulses of the second voltage Vs are applied to all the Y electrode lines. The voltage applied to the M electrode line is continuously lowered from the second voltage Vs to the ground voltage V _G as the third voltage. At this time t ₁ to t ₂ , the ground voltage V _G is applied to the X electrode line and the address electrode line. Accordingly, wall discharges of all the discharge cells are erased while weak discharges occur between the electrodes of all the discharge cells.

8 and 10, the wall charge accumulation time t ₂ to t ₃ is applied to all M electrode lines while the ground voltage V _G is applied to the X electrode line, the Y electrode line, and the address electrode line. The voltage to be continuously increased to the first voltage V _SET + Vs which is higher by the fourth voltage V _SET than the second voltage Vs. Here, it may be raised nonlinearly as shown by the solid line, or it may be raised linearly as shown by the dotted line. Accordingly, while a weak discharge occurs between the electrodes of all the discharge cells, a large number of negative wall charges are formed around the M electrode, and positive wall charges are formed around the remaining electrodes.

8 and 11, the wall charge distribution time (t ₃ ~ t _4), the voltage applied to all the X electrode lines and Y-electrode lines are maintained at a second voltage (V _S), the address electrode lines In the state where the ground voltage V _G is applied, the voltage applied to all M electrode lines is continuously lowered from the second voltage V _S to the ground voltage V _G as the third voltage. Here, it may be nonlinearly lowered as shown by the solid line or linearly lowered as shown by the dashed line. As a result, a weak discharge occurs between the electrodes of all the discharge cells, and a part of the negative wall charges around the M electrode moves around the X and Y electrodes. In addition, more positive wall charges around the address electrodes.

Accordingly, the wall potentials of the X electrode line and the Y electrode line are lower than the wall potential of the address electrode line and higher than the wall potential of the M electrode line. Accordingly, the addressing voltages V _A -V _G required for the counter discharge between the selected address electrode line and the Y electrode line may be lowered at the subsequent addressing time A. FIG.

8 and 12, at a subsequent addressing time A, a display data signal is applied to an address electrode line and biased with a fifth voltage V _SCAN lower than the second voltage V _S. Scanning pulses of ground voltage V _G are sequentially applied to the line. The display data signal applied to each address electrode line has a positive addressing voltage when the discharge cell is selected and a ground voltage otherwise. Here, the ground voltage is applied to all the X electrode lines, and the second voltage V _S is applied to all the Y electrode lines. Accordingly, in the selected discharge cell, when the display data signal of the positive addressing voltage V _A is applied while the scan pulse of the ground voltage V _G is applied, addressing discharge occurs. Due to this addressing discharge, positive wall charges are formed around the X and M electrodes of the selected discharge cell, and negative wall charges are formed around the Y and address electrodes of the selected discharge cell.

8, 13, and 14, in the following display-hold time S, a second voltage V _S is applied to all M electrode lines and a ground voltage V _G is applied to all address electrode lines. In the applied state, the display-holding pulse of the second voltage V _S is alternately applied to all X electrode lines and all Y electrode lines. This causes a discharge for display-holding in the discharge cell in which the wall charge was formed in this state at the addressing time A. FIG.

As described above, the plasma display panel having different spacings of the multi-electrodes of the present invention can obtain the following effects.                     

First, the distance between the X, Y, and M electrodes located in the non-display area is made larger than that between the X, Y, and M electrodes located in the display area, thereby preventing neon discharge in the non-display area in the sustain discharge period. . Thereby, the image quality can be improved.

Second, as addressing is performed while the M electrodes formed between all the X and Y electrodes are scanned, the discharge cells by all the X and Y electrodes can be set.

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 (11)

A front panel comprising a front substrate, an X and Y electrode formed on an inner surface thereof, an M electrode disposed between the X and Y electrodes in a unit discharge cell, and a front dielectric layer embedded therein; A rear panel having a rear substrate disposed to face the front substrate, an address electrode formed on an inner surface thereof and disposed in a direction crossing the X, Y and M electrodes, and a rear dielectric layer embedded therein; A partition wall disposed between the front and rear panels to define a discharge cell; It includes; red, green, blue phosphor layer applied in the partition wall, Wherein the X, Y, and M electrodes have a larger spacing between the electrodes in the non-display area at the edge of the substrate than the spacing between the electrodes in the display area for implementing an image. The method of claim 1, Wherein the X, Y, and M electrodes each include a transparent electrode and a bus electrode superimposed on the transparent electrode. The method of claim 2, And the width of the transparent electrode is wider than that of the bus electrode. The method of claim 2, The X, Y, and M electrodes each of which extends integrally with the bus electrode in a non-display area and includes a terminal portion that is wider than the bus electrode, wherein the electrodes have different spacings. The method of claim 4, wherein Wherein the X electrode and the Y or M electrode have terminal portions formed in opposite directions of the substrate. The method of claim 2, The X electrode and the M electrode have a larger gap in the non-display area than the gap in the display area because the transparent electrode for the X electrode and the transparent electrode for the M electrode are formed narrower in the non-display area than in the display area. Plasma display panel formed with a different interval of the multi-electrode. The method of claim 2, The X electrode and the M electrode are formed such that the width of the terminal portion integrally connected with the bus electrode in the non-display area is equal to the width of the bus electrode in the display area, and the transparent electrode for the X electrode and the transparent electrode for the M electrode are formed in the display area. The narrower in the non-display area, the narrower in the non-display area than the gap in the display area, the plasma display panel is formed with a different interval of the multi-electrode. The method of claim 2, The X electrode and the M electrode are formed such that the width of the terminal portion integrally connected with the bus electrode in the non-display area is equal to the width of the bus electrode in the display area, and the transparent electrode for the X electrode and the transparent electrode for the M electrode are not displayed. A plasma display panel having a different spacing between multi-electrodes, wherein the spacing in the non-display area is wider than that in the display area because it is not formed in the area. The method of claim 2, The X electrode and the M electrode are formed so that the width of the terminal portion integrally connected with the bus electrode in the non-display area is equal to the width of the bus electrode in the display area, and the transparent electrode and the bus electrode for the M electrode correspond to the X electrode. The non-display area is formed in a non-display area, the distance between the non-display area is wider than the spacing in the display area, characterized in that the spacing of the multi-electrode differently formed. The method of claim 2, And the transparent electrode is an ITO electrode. The method of claim 2, The bus electrode may be formed of a silver paste or a chromium-copper-chromium layer.

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