KR100759449B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel and a driving method thereof, comprising: a first substrate and a second substrate disposed to face each other, discharge cells disposed in a plurality of spaces between the first substrate and the second substrate; Address electrodes corresponding to the discharge cells and extending in a first direction on the first substrate, a first dielectric layer covering the address electrodes on the first substrate, and electrically separated from the address electrodes on the first dielectric layer, A first electrode and a second electrode which extend in a second direction crossing the first direction and are disposed to face each other with the discharge cells interposed therebetween; a second dielectric layer surrounding the first electrode and the second electrode; and each discharge A phosphor layer formed in the cell, wherein the second dielectric layer includes different thicknesses of the portions surrounding the opposing surfaces of the first electrode and the second electrode, and is formed on the first electrode and the second electrode in the sustain discharge period. each Alternately applying sustain discharge voltage pulses of different magnitudes.

Plasma display panel, cover electrode, dielectric layer, sustain discharge period.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

1 is a partially exploded perspective view of a plasma display panel according to a first embodiment of the present invention.

FIG. 2 is a side cross-sectional view taken along line II-II after assembling the plasma display panel of FIG. 1. FIG.

3 is a plan view showing the structure of an electrode and a discharge cell of the plasma display panel according to the first embodiment of the present invention.

4 is a layout view of electrodes of a plasma display panel according to a first exemplary embodiment of the present invention.

5 is a diagram illustrating driving waveforms of the plasma display panel according to the first embodiment of the present invention.

6 is a side cross-sectional view of a plasma display panel according to a second embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel and a driving method thereof. More particularly, the present invention relates to a plasma display panel and a driving method thereof in which a counter discharge electrode structure is applied to improve discharge efficiency and prevent address mis-discharge. It is about.

In general, a plasma display panel implements an image by using visible light of red (R), green (G), and blue (B) generated by vacuum ultraviolet rays emitted from a plasma obtained through gas discharge to excite a phosphor.

The plasma display panel can realize an ultra-large screen of 60 inches or more within a thickness of only 10 cm, and has no characteristic of distortion due to color reproduction power and viewing angle because it is a self-luminous display device such as a cathode ray tube (CRT).

The plasma display panel has a spotlight as a TV and an industrial flat panel display which has advantages in terms of productivity and cost due to its simple manufacturing method compared to a liquid crystal display (LCD).

An example of this plasma display panel is an alternating current three-electrode surface discharge plasma display panel. As an example, an AC type three-electrode surface discharge plasma display panel includes a substrate including display electrodes including sustain electrodes and scan electrodes located on the same surface, and an address electrode spaced vertically from the substrate. Different substrates are encapsulated with each other, and discharge gas is filled therebetween.

In this plasma display panel, the discharge is determined by the discharge between the address electrode and the scan electrode connected to each line and independently controlled, and the sustain discharge displaying the screen is made by the sustain electrode and the scan electrode located on the same plane. .

However, as the scan electrodes and the address electrodes are provided on different substrates, the discharge distance between the two electrodes is increased, resulting in an increase in power consumption required for the address discharge.

The sustain discharge which expresses visible light in each of the discharge spaces selected by the address discharge has a problem in that the discharge efficiency is lowered because it occurs in the form of a surface discharge having a lower discharge efficiency than the counter discharge between the display electrodes disposed on the same substrate. .

In addition, when address mis-discharge is generated between the address electrode and the sustain electrode other than the scan electrode in the address period, display charges occur in the sustain discharge period because wall charges having the same polarity are formed in the dielectric layers covering the scan electrode and the sustain electrode, respectively. The problem of not doing so arises.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to form display electrodes having a counter-discharge type structure on the same substrate surface as the address electrode, and to prevent erroneous discharge from occurring between the address electrode and the display electrodes. The present invention provides a plasma display panel and a driving method thereof.

In order to achieve the above object, the plasma display panel of the present invention comprises: a first substrate and a second substrate disposed to face each other, discharge cells disposed in a plurality of spaces between the first substrate and the second substrate; Address electrodes corresponding to the discharge cells and extending in a first direction on the first substrate, a first dielectric layer covering the address electrodes on the first substrate, and electrically separated from the address electrodes on the first dielectric layer, A first electrode and a second electrode which extend in a second direction crossing the first direction and are disposed to face each other with the discharge cells interposed therebetween; a second dielectric layer surrounding the first electrode and the second electrode; and each discharge And a phosphor layer formed in the cell, wherein the second dielectric layer includes different thicknesses of portions surrounding the opposing surfaces of the first electrode and the second electrode.

The second dielectric layer may be formed to surround the opposite surface of the second electrode thicker than the opposite surface of the first electrode.

The height of the second electrode measured from the first substrate surface may be higher than the height of the first electrode measured from the first substrate.

It may include a partition wall protruding toward the first substrate on the second substrate to partition each discharge cell.

The address electrode may include a line electrode extending along the partition wall in the first direction, and a protruding electrode extending in the second direction from the bus electrode and protruding into the discharge cell. The protruding electrode may be formed closer to the first electrode than the second electrode.

The first electrode and the second electrode may extend along the partition wall in the second direction, and may be alternately disposed to cross the boundary of the discharge cells adjacent to each other in the first direction.

Corresponding to respective discharge cells partitioned between the first substrate and the second substrate, wherein the address electrodes, the first electrode, and the second electrodes are electrically separated and intersected by the first dielectric layer on the first substrate. 12. A method of driving a plasma display panel including a second dielectric layer disposed on the first electrode and the second electrode, the second dielectric layer covering the first electrode and the second electrode in different thicknesses. Alternately applying a holding voltage pulse of.

As the sustain voltage pulse applied to the first electrode, a sustain voltage pulse larger than the sustain voltage pulse applied to the second electrode may be applied.

The second dielectric layer may be formed to have a different thickness from a portion surrounding the opposing surfaces of the first electrode and the second electrode.

The height of the second electrode measured from the first substrate surface may be higher than the height of the first electrode measured from the first substrate.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification. In addition, when a part is said to "include" a certain component, this means that it may further include other components, except to exclude other components unless otherwise stated.

In addition, the wall charge in the present invention refers to a charge formed close to each electrode on the wall of the cell (eg, the dielectric layer). And the wall charge is not actually in contact with the electrode itself, but is described here as “formed”, “accumulated” or “stacked” on the electrode. In addition, the wall voltage refers to the potential difference formed in the wall of the cell by the wall charge.

1 is a partially exploded perspective view of a plasma display panel according to a first embodiment of the present invention.

Referring to FIG. 1, the plasma display panel according to the present exemplary embodiment is basically referred to as a first substrate 20 (hereinafter, referred to as a “front substrate”) and a second substrate 10 (hereinafter, referred to as a “back substrate”. .) Are disposed to face each other at a predetermined interval, and a plurality of discharge cells 18 are partitioned in the space between the front substrate 20 and the rear substrate 10.

In the discharge cell 18, a phosphor layer 15 that absorbs ultraviolet light and emits visible light is formed along the partition walls and the bottom surface, and discharge gas (for example, xenon (Xe), neon ( Ne) and the like (mixed gas) are filled.

Address electrodes 50 are formed on the opposite side of the back substrate 10 of the front substrate 20 along the first direction (y-axis direction of the drawing), and cover the address electrodes 50 to cover the front substrate 20. The first dielectric layer 22 is formed on the entire inner surface of the substrate. The address electrodes 50 are formed to be parallel to each other while maintaining neighboring ones at a predetermined interval.

On the first dielectric layer 22, display electrodes 30 and 40 each extending in a second direction (the x-axis direction of the drawing) intersecting with the address electrode 50 protrude toward the rear substrate 10. Is formed. The display electrodes 30 and 40 are spaced apart from the first dielectric layer 22 and are electrically separated from the address electrode 50. The second dielectric layer 24 is formed to surround the display electrodes 30 and 40 on the first dielectric layer 22.

A partition wall 13 is formed on the rear substrate 10 to partition the discharge cells 18. In the present embodiment, the partition wall 13 extends in a direction parallel to the address electrode 50. 13b) and a second partition member 13a formed to intersect the first partition member 13b and partitioning each discharge cell 18 into an independent discharge space.

 Such a barrier rib structure is not limited to the above-described structure, and a stripe-type barrier rib structure including only a barrier member in parallel with the address electrode may be applied to the present invention, and a barrier rib structure having various shapes for partitioning discharge cells is also possible. It belongs to the scope of the invention.

In another example, a dielectric layer may be formed on the rear substrate 10, and the partition 13 may be formed thereon.

FIG. 2 is a side cross-sectional view taken along line II-II after assembling the plasma display panel of FIG. 1, and FIG. 3 illustrates a structure of an electrode and a discharge cell of the plasma display panel according to the first embodiment of the present invention. Top view.

Referring to these drawings, the address electrode 50 extends from the line electrode 51 toward the opposite side from the line electrode 51 and the line electrode 51 which are extended to one edge of the discharge cell 18. Protruding electrode 52 is included.

In this case, the protruding electrode 52 may be formed of a transparent electrode, for example, an indium tin oxide (ITO) electrode, to secure the aperture ratio of the panel, and the line electrode 51 compensates for the high resistance of the transparent electrode to provide electrical conductivity. It is preferable that it consists of a metal electrode in order to make it favorable.

In the plasma display panel according to the present exemplary embodiment, the protruding electrode 52 has a rectangular planar shape. The protruding electrode may be deformed into various shapes in consideration of a discharge mechanism generated in the discharge cell 18.

 The display electrodes 30 and 40 are referred to as first electrodes 30 (hereinafter referred to as "hold electrodes") and second electrodes 40 (hereinafter referred to as "scan electrodes") corresponding to the respective discharge cells 18.) It includes.

The sustain electrode 30 mainly serves as an electrode for applying a voltage necessary for discharging between sustain discharge cells, and the scan electrode 40 serves as an electrode for applying a voltage required for a reset period, an address period, and a sustain discharge period, respectively. Play a role.

 Therefore, the scan electrode 40 is involved in all of the reset period, the address period, and the sustain discharge period, and the sustain electrode 30 is mainly involved in the discharge of the sustain period. However, the role may vary depending on the voltage applied to each electrode.

The sustain electrode 30 and the scan electrode 40 are alternately arranged to cross the boundary of the discharge cell 18. More preferably, the sustain electrode 30 and the scan electrode 40 are alternately arranged along the second partition member 13a.

The second dielectric layer 24 is formed to have a different thickness from the portion surrounding the opposing surface of the sustain electrode 30 and the scan electrode 40. In particular, the second dielectric layer 24 is formed to cover the thickness t1 of the opposite surface of the sustain electrode 30 to be thicker than the thickness t2 of the opposite surface of the first electrode of the scan electrode 40 (t1>). t2).

Therefore, the discharge generated between the address electrode 50 and the sustain electrode 30 during the address period due to the thickness difference t1-t2 between the sustain electrode 30 and the second dielectric layer 24 surrounding the scan electrode 40. The start voltage can be made larger than the discharge start voltage generated between the address electrode 50 and the scan electrode 40 to prevent address mis-discharge between the protruding electrode 52 and the sustain electrode 30 of the address electrode 50. Make sure

Referring to FIG. 3, the address electrode 50 together with the above-described second dielectric layer 24 in order to more effectively prevent address misdischarge between the address electrode 50 and the sustain electrode 30 during such an address period. It is also preferable to form the protruding electrode 52 closer to the scan electrode 40 than the sustain electrode 30 (L1> L2).

 Therefore, by forming the distance between the protruding electrode 52 and the scan electrode 40 more closely, the discharge start voltage between the protruding electrode 52 and the sustain electrode 30 during the address period is increased. By forming larger than the discharge start voltage between 40, address mis-discharge can be prevented more effectively.

In the plasma display panel according to the present exemplary embodiment, the cross section obtained by cutting the sustain electrode 30 and the scan electrode 40 into a plane perpendicular to the longitudinal direction, respectively, is a direction parallel to the planes of the substrates 10 and 20 (y in the drawing). The width in the direction perpendicular to the surface of the substrate 10 and 20 (the z-axis direction in the drawing) may be greater than the width in the axial direction. In other words, the height from the front substrate 20 surface of the sustain electrode 30 and the scan electrode 40 can be made higher.

Accordingly, the long gap discharge, which is known to have excellent luminous efficiency, is possible between the sustain electrode 30 and the scan electrode 40 by inducing opposite discharges by increasing the opposite areas facing each other, and thus compared with the conventional surface discharge structure. Higher luminous efficiency can be obtained. Furthermore, as the plasma display panel becomes more fine and the size of the discharge cells becomes smaller, the main problems caused by the conventional surface discharge structure, that is, the problems such as the reduction of the luminous efficiency and luminance and the increase of the discharge start voltage, can be overcome.

Meanwhile, an MgO protective layer 26 is formed on the first dielectric layer 22 and the second dielectric layer 24 to protect each dielectric layer from collision of ions of the ionized atoms during plasma discharge. The MgO protective layer 29 may increase the discharge efficiency because the emission coefficient of the secondary electrons is high when the ions hit.

Hereinafter, a driving method of the plasma display panel according to the first embodiment of the present invention will be described.

FIG. 4 is a layout view of electrodes of the plasma display panel according to the first embodiment of the present invention, and FIG. 5 is a view illustrating driving waveforms of the plasma display panel according to the first embodiment of the present invention.

Referring to these drawings, the plasma display panel according to the present embodiment corresponds to the discharge cells on the front substrate 20, and the address electrodes 50 (A to Am), and the sustain electrode in a direction crossing the same. 30 (X to Xn) and scan electrodes 40 (Y to Yn) are alternately arranged side by side.

In such a driving method of the plasma display panel according to the present embodiment, gray scale display is realized by a combination of a plurality of subfields including a reset period, an address period, and a sustain discharge period. The reset period again includes a rising period and a falling period.

In the rising period of the reset period, the voltage of the scan electrode 40 (Y) is gradually increased from the voltage Vs to the voltage Vset while the sustain electrode 30 is held at the reference voltage (0 V voltage). Here, the voltage of the scan electrode 40 (Y) is shown to increase in the form of a lamp. Then, while the voltage of the scan electrodes 40 (Y) increases, the fee is weak between the scan electrodes 40 (Y) and the sustain electrodes 30 (X) and between the scan electrodes 40 (Y) and the address electrodes 50 (A). As one discharge (hereinafter referred to as “weak discharge”) occurs, a negative wall charge is formed on the scan electrode 40 (Y) and a positive (+) on the sustain electrode 30 (X) and the address electrode 50. Wall charges are formed.

In the falling period of the reset period, the voltage of the scan electrode 40 (Y) gradually decreases from the Vset voltage to the Vnf voltage while the sustain electrode 30 (X) is maintained at the Ve voltage.

While the voltage of the scan electrodes 40 and Y decreases, the weak discharge is between the scan electrodes 40 and Y and the sustain electrode 30 and X, and between the scan electrodes 40 and Y and the address electrode 50 and A. As a result, the negative wall charges formed on the scan electrode 40 (Y) and the positive wall charges formed on the sustain electrode 30 (X) and the address electrode 50 (A) are erased. In general, the magnitude of the voltage (Vnf-Ve) is set near the discharge start voltage between the scan electrode 40 (Y) and the sustain electrode 30 (X).

Therefore, the wall voltage between the scan electrodes 40 (Y) and the sustain electrodes 30 (X) becomes almost 0 V, whereby cells that do not have address discharge in the address period can be prevented from being erroneously discharged in the sustain period.

In order to select the discharge cells to be turned on in the address period, a scan pulse having a VscL voltage is sequentially applied to the plurality of scan electrodes 40 (Y) while maintaining the voltage of the sustain electrode 30 (X) at a Ve voltage.

At this time, the Va voltage is applied to the address electrode 50 (A) passing through the discharge cell to be selected from the plurality of discharge cells formed by the scan electrode 40 (Y) and the sustain electrode 30 (X) to which the VscL voltage is applied. Has an address pulse.

Then, between the address electrode 50 (A) applied with the Va voltage and the scan electrode 40 (Y) applied with the VscL voltage, the scan electrode 40 (Y) applied with the VscL voltage, and the sustain electrode applied with the Ve voltage ( An address discharge occurs between 30; X, so that a positive wall charge is formed on the scan electrode 40 (Y), and a negative wall charge is formed on the address electrode 50 (A) and the sustain electrode 30 (X), respectively.

The VscH voltage higher than the VscL voltage is applied to the scan electrode 40 (Y) to which the VscL voltage is not applied, and the reference voltage (0 V) is applied to the address electrode to which the Va voltage is not applied.

In order to perform this operation in the address period, one of the scan electrodes 30 (Y1 to Yn) to which a scan pulse having a VscL voltage is applied is selected among the scan electrodes 30 (Y1 to Yn). For example, in the single drive, the scan electrodes 30 (Y1 to Yn) can be selected in the order arranged in the vertical direction.

When one scan electrode 30 (Y1 to Yn) is selected, the discharge cell to be turned on is selected among the discharge cells formed by the scan electrode 30 (Y1 to Yn). That is, a cell to which an address pulse having a Va voltage is applied is selected among the address electrodes 50 (A1 to Am).

Specifically, first, a scan pulse is applied to the scan electrode 40 of the first row (Y1 of FIG. 4) and an address pulse is applied to the address electrode 50 (A1 of FIG. 4) located in the cell to be turned on in the first row. . Then, discharge occurs between the scan electrodes 40 (Y1) of the first row and the address electrodes 50 (A1) to which the address pulses are applied, so that the positive wall charges and the address electrodes 50; A negative wall charge is formed on A1) and sustain electrode 30 (X1 of FIG. 4), respectively. As a result, the wall voltage Vwxy is formed between the scan electrodes 40 and Y and the sustain electrode 30 and X such that the potential of the scan electrode 40 and Y is higher than the potential of the sustain electrode 30 and X. .

Subsequently, while the scan pulse is applied to the scan electrode 40 of the second row (Y2 of FIG. 4), the address pulse is applied to the address electrode 50 (A2 of FIG. 4) located in the cell to be turned on in the second row. Then, an address discharge occurs in the cell formed by the address electrode 50 (A2) to which the address pulse is applied and the scan electrode 40 (Y2) in the second row, thereby forming wall charges in the cell. Similarly, an address pulse is applied to the address electrode 50 (Am in FIG. 4) positioned in the cell to be turned on while the scan pulse is sequentially applied to the scan electrodes 40 (Yn in FIG. 4) of the remaining rows, and the wall charge is applied to the corresponding cells. Is formed.

In the meantime, the second dielectric layer 24 is formed to surround the sustain electrode 30 (X) and the scan electrode 40 (Y) with different thicknesses t1> t2 during the address period, thereby forming the address electrode 50 (A). And the discharge start voltage generated between the sustain electrode 30 (X) and the discharge start voltage generated between the address electrode 50 (A) and the scan electrode 40 (Y). 40, it is possible to effectively prevent the address mis-discharge that may be caused by the potential difference (Ve-Va) between Y).

In the sustain discharge period, the sustain discharge having the high level voltage (Vy and Vx voltages in FIG. 5) and the low level voltage (0 V voltage in FIG. 2) alternately on the scan electrodes 40 (Y) and the sustain electrode 30 (X). A pulse is applied. That is, when Vy voltage is applied to scan electrode 40 (Y), 0 V voltage is applied to sustain electrode 30 (X), and Vx voltage is applied to sustain electrode 30 (X). ) Is applied to the reference voltage (0V).

At this time, the Vx voltage applied to the sustain electrode 30 (X) is higher than the Vy voltage applied to the scan electrode 40 (Y). Therefore, when Vx and Vy are equal to each other, the second dielectric layer 24 is formed to surround the sustain electrode 30 (X) thicker than the scan electrode 40 (X), so that the sustain electrode 30 and X are scanned. Due to the difference in the amount of wall charges accumulated in the second dielectric layer surrounding the electrodes 40 (X), the Y discharge unit light displayed by applying the Vy voltage to the scan electrodes 40 (X) and the Vx voltage at the sustain electrodes 30 (X) This prevents the difference between the X discharge unit light that is applied and displayed so as to implement a more flat screen.

Subsequently, the process of applying the sustain discharge pulse to the scan electrodes 40 (X) and the sustain electrodes 30 (X) is repeated a number of times corresponding to the weight indicated by the corresponding sub-field.

Hereinafter, a plasma display panel according to a second embodiment of the present invention will be described with reference to the accompanying drawings, and the same reference numerals as those of the first embodiment described above are denoted by the same reference numerals, and repeated description thereof will be omitted. .

  6 is a side cross-sectional view of a plasma display panel according to a second embodiment of the present invention.

Referring to FIG. 6, the plasma display panel according to the present exemplary embodiment may have different sizes of the sustain electrode 30 and the scan electrode 40 to prevent address mis-discharge.

In particular, the height H1 of the storage electrode 30 is formed from the front substrate 20, more specifically, the first dielectric layer 22, so that the scan electrode 40 is higher than the height H2. The discharge start voltage required for the discharge between the address electrode 50 (A) and the scan electrode 40 (Y) is higher than the discharge start voltage required for the discharge between the address electrode 50 (A) and the sustain electrode 30 (X). It is possible to prevent the address mis-discharge that may be caused by the potential difference Ve-Va between the 50 (A) and the scan electrode 40 (Y).

On the other hand, during the sustain discharge period, the Vx voltage applied to the sustain electrode 30 (X) is formed to be higher than the Vy voltage applied to the scan electrode 40 (Y), so that the sustain electrodes 30 (X) having different heights are formed. The same amount of wall charges is accumulated around the scan electrodes 40 (Y), so that the Y discharge unit light displayed by applying the Vy voltage to the scan electrodes 40 (Y) and the Vx voltage on the sustain electrodes 30 (X). It is natural to prevent the difference of the X discharge unit light displayed by being applied from occurring.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

As described above, the plasma display panel and the driving method thereof according to the present invention improve the discharge efficiency by applying a counter discharge electrode structure. In addition, the thickness of the dielectric layer surrounding the display electrode and the height of the display electrode may be different from each other to prevent address mis-discharge. In addition, by applying a sustain discharge pulse having a different size to each display electrode in the sustain discharge period at the intersection, it is possible to reduce the difference of the unit light to form a clearer image.

Claims (11)

A first substrate and a second substrate disposed to face each other; Discharge cells which are divided into a plurality of spaces between the first substrate and the second substrate; Address electrodes corresponding to the discharge cells and extending in a first direction on the first substrate; A first dielectric layer covering the address electrode on the first substrate; Each discharge cell is electrically separated from the address electrode on the first dielectric layer, extends in a second direction crossing the first direction, and has a height in a direction perpendicular to the upper substrate so as to face each other. Scan electrodes and sustain electrodes disposed to face each other; A second dielectric layer surrounding the scan electrode and the sustain electrode; And A phosphor layer formed in each of the discharge cells; The second dielectric layer is formed to surround the sustain electrode thicker than the scan electrode. The method of claim 1, And the second dielectric layer is formed to surround the opposite surface of the sustain electrode thicker than the opposite surface of the scan electrode. The method of claim 1, And a height of the sustain electrode measured from the first substrate surface is higher than a height of the scan electrode measured from the first substrate. The method of claim 1, On the second substrate, And a partition wall protruding toward the first substrate and partitioning the discharge cells. The method of claim 4, wherein The address electrode, A line electrode extending along the partition wall in the first direction; And And a protruding electrode extending from the line electrode in the second direction and protruding into the discharge cell. The method of claim 5, The protruding electrode, And a plasma display panel formed closer to the scan electrode than the sustain electrode. The method of claim 4, wherein The scan electrode and the sustain electrode, A plasma display panel extending along the partition wall in the second direction and alternately arranged to cross the boundary of discharge cells adjacent to each other in the first direction. Corresponding to respective discharge cells partitioned between the first substrate and the second substrate, wherein the address electrodes, the scan electrodes, and the sustain electrodes are arranged to be electrically separated from each other by the first dielectric layer and to cross each other; In the driving method of the plasma display panel comprising a second dielectric layer surrounding the sustain electrode thicker than the scan electrode, In the sustain discharge period, sustain voltage pulses having different magnitudes are alternately applied to the scan electrode and the sustain electrode, And a sustain voltage pulse greater than the sustain voltage pulse applied to the sustain electrode is applied to the scan electrode. delete The method of claim 8, And the second dielectric layer is formed to cover the opposite surface of the sustain electrode thicker than the opposite surface of the scan electrode. The method of claim 8, And a height of the sustain electrode measured from the first substrate surface is higher than a height of the scan electrode measured from the first substrate.

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