KR20080061001A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to improve image quality by preventing the generation of discharge in a dummy discharge cell upon being driven. A rear substrate(111) is arranged to be opposite to a front substrate(101). Plural effective address electrodes(113) are arranged on an active area of the rear substrate. At least one dummy electrode is arranged on a dummy area on a circumference of the active area. The dummy address electrode is grounded. A scan electrode(102) and a sustain electrode(103) are arranged in parallel on the front substrate. An interval between the scan electrode and the sustain electrode at the active area of the front substrate is shorter than an interval between the scan electrode and the sustain electrode at the dummy area on the circumference of the active area. A width of at least one of the scan electrode and the sustain electrode at the active area of the front substrate is greater than a width of at least one of the scan electrode and the sustain electrode at the dummy area of the circumference of the active area.

Description

Plasma Display Panel

1 is a view for explaining the structure of a plasma display panel according to an embodiment of the present invention.

2 is a diagram for explaining a dummy region and an effective region.

3A to 3B are diagrams for explaining the dummy address electrode.

4A to 4B are diagrams for explaining the interval between the scan electrode and the sustain electrode in the dummy region and the effective region.

5A to 5B are views for explaining the widths of the scan electrode and the sustain electrode in the dummy region and the effective region.

6 is a view for explaining an example of still another structure of a scan electrode and a sustain electrode.

FIG. 7 is a diagram for describing an image frame for implementing gray levels of an image in a plasma display panel according to an embodiment of the present invention. FIG.

8 is a view for explaining an example of an operation of a plasma display panel according to an embodiment of the present invention in a subfield included in an image frame;

<Description of the symbols for the main parts of the drawings>

101: front substrate 102: scan electrode

103: sustain electrode 104: upper dielectric layer

105: protective layer 111: back substrate

112: partition 113: effective address electrode

114: phosphor layer 115: lower dielectric layer

112a: second partition 112b: first partition

The present invention relates to a plasma display panel.

In general, a phosphor layer is formed in a discharge cell (Cell) partitioned by a partition, and a plurality of electrodes are formed in the plasma display panel.

The driving signal is supplied to the discharge cell through the electrode.

Then, the discharge is generated by the drive signal supplied in the discharge cell. Here, when discharged by a drive signal in the discharge cell, the discharge gas filled in the discharge cell generates vacuum ultraviolet rays, and the vacuum ultraviolet light emits the phosphor formed in the discharge cell to emit visible light. Generate. The visible light displays an image on the screen of the plasma display panel.

One embodiment of the present invention is to provide a plasma display panel which improves an address electrode disposed in a dummy area and prevents the occurrence of false discharge.

According to an embodiment of the present invention, a plasma display panel includes a front substrate, a rear substrate disposed to face the front substrate, a plurality of effective address electrodes disposed in an active area of the rear substrate, and an outer portion of the effective region. At least one dummy address electrode is disposed in the dummy area, and the at least one dummy address electrode is grounded (GND).

In addition, there are a plurality of dummy address electrodes, and the plurality of dummy address electrodes are commonly grounded.

Further, scan electrodes and sustain electrodes parallel to each other are disposed on the front substrate, and a distance between the scan electrodes and the sustain electrodes in the effective area of the front substrate is smaller than the gap between the scan electrodes and the sustain electrodes in the dummy area outside the effective area.

Also, a scan electrode and a sustain electrode parallel to each other are disposed on the front substrate, and a width of at least one of the scan electrode and the sustain electrode in the effective area of the front substrate is at least one of the scan electrode and the sustain electrode in the dummy area outside the effective area. Is greater than the width of.

In addition, a scan electrode and a sustain electrode parallel to each other are disposed on the front substrate, and at least one of the scan electrode and the sustain electrode in the effective region of the front substrate includes a bus electrode and a transparent electrode, and a scan in a dummy region outside the effective region The electrode and the sustain electrode consist of bus electrodes.

Hereinafter, a plasma display panel according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining the structure of a plasma display panel according to an embodiment of the present invention.

Referring to FIG. 1, the plasma display panel according to the exemplary embodiment of the present invention is disposed to face the front substrate 101 and the front substrate 101 on which the scan electrode 102 and the sustain electrode 103 are arranged in parallel with each other. The rear substrate 111 on which the effective address electrode 113 intersecting the scan electrode 102 and the sustain electrode 103 is disposed is bonded to each other.

In addition to the effective address electrode 113, a dummy address electrode (not shown) is disposed on the rear substrate 111. The effective address electrode 113 is disposed in an active area of the rear substrate 111, and a dummy address electrode (not shown) to be described later is disposed in a dummy area outside the effective area. .

The dummy address electrode will be described later in more detail.

Although not illustrated in FIG. 1, the scan electrode 102 and the sustain electrode 103 may each include a transparent electrode and a bus electrode.

The transparent electrode may include a transparent material such as indium tin oxide (ITO).

The bus electrode may include a metal material having excellent electrical conductivity such as silver (Ag).

Alternatively, the scan electrode 102 and the sustain electrode 103 may have a single layer structure. For example, the scan electrode 102 and the sustain electrode 103 may be an electrode in which the above-mentioned transparent electrode is omitted, for example, an ITO-Less electrode.

In addition, although not shown in FIG. 1, a black layer may be disposed between the front substrate 101 and the scan electrode 102 and the sustain electrode 103. For example, when the scan electrode 102 and the sustain electrode 103 each include a transparent electrode and a bus electrode, between the transparent electrode and the bus electrode of the scan electrode 102 and the transparent electrode of the sustain electrode 103 and Black layers may be disposed between the bus electrodes, respectively.

A dielectric layer covering one surface of the scan electrode 102 and the sustain electrode 103, for example, an upper dielectric layer 104, is disposed on one surface of the front substrate 101 on which the scan electrode 102 and the sustain electrode 103 are disposed. Can be.

The upper dielectric layer 104 limits the discharge current of the scan electrode 102 and the sustain electrode 103 and can insulate between the scan electrodes 102 and Y and the sustain electrodes 103 and Z.

A protective layer 105 may be disposed on the upper surface of the upper dielectric layer 104 to facilitate a discharge condition. The protective layer 105 may include a material having a high secondary electron emission coefficient, such as magnesium oxide (MgO).

An electrode, for example, an effective address electrode 113 and a dummy address electrode (not shown) are disposed on the rear substrate 111, and an effective address electrode is disposed on the rear substrate 111 on which the effective address electrode 113 and the dummy address electrode are disposed. A dielectric layer covering the 113 and dummy address electrodes, such as the lower dielectric layer 115, may be disposed.

The lower dielectric layer 115 may insulate the effective address electrode 113 and the dummy address electrode.

In addition, a partition 112 having a discharge space, that is, a stripe type, a well type, a delta type, a honeycomb type, and the like, which partitions a discharge cell, is formed on an upper portion of the lower dielectric layer 115. Can be arranged. Accordingly, red (R), green (G), and blue (B) discharge cells may be provided between one surface of the front substrate 101 and the rear substrate 111.

In addition, in addition to the red (R), green (G), and blue (B) discharge cells, white (W) or yellow (Yellow: Y) discharge cells may be further provided.

Meanwhile, although the widths of the red (R), green (G), and blue (B) discharge cells in the plasma display panel according to an embodiment of the present invention may be substantially the same, red (R) and green (G) may be substantially the same. And the width of at least one of the blue (B) discharge cells may be different from that of the other discharge cells.

For example, the width of the red (R) discharge cell is the smallest, and the width of the green (G) and blue (B) discharge cells can be made larger than the width of the red (R) discharge cell. Here, the width of the green (G) discharge cell may be substantially the same as or different from the width of the blue (B) discharge cell.

The width of the phosphor layer 114, which will be described later, disposed in the discharge cell is then changed in relation to the width of the discharge cell. For example, the width of the blue (B) phosphor layer disposed in the blue (B) discharge cell is wider than the width of the red (R) phosphor layer disposed in the red (R) discharge cell, and at the same time in the green (G) discharge cell. The width of the green (G) phosphor layer disposed may be wider than the width of the red (R) phosphor layer disposed in the red (R) discharge cell.

Then, color temperature characteristics of the image to be implemented may be improved.

In addition, the plasma display panel according to the exemplary embodiment of the present invention may have not only the structure of the partition wall 112 shown in FIG. 1 but also the structure of the partition wall having various shapes. For example, the partition wall 112 includes a first partition wall 112b and a second partition wall 112a, where the height of the first partition wall 112b and the height of the second partition wall 112a are different from each other. Etc. may be possible.

In the case of the differential partition wall structure, the height of the first partition wall 112b among the first partition wall 112b or the second partition wall 112a may be lower than the height of the second partition wall 112a.

Meanwhile, although FIG. 1 shows and describes each of the red (R), green (G), and blue (B) discharge cells arranged on the same line, it may be arranged in a different shape. For example, a delta type arrangement in which red (R), green (G) and blue (B) discharge cells are arranged in a triangular shape may be possible. In addition, the shape of the discharge cell may also be a variety of polygonal shapes, such as pentagonal, hexagonal, as well as rectangular.

In addition, in FIG. 1, only the case where the partition wall 112 is formed on the rear substrate 111 is illustrated, but the partition wall 112 may be disposed on at least one of the front substrate 101 and the rear substrate 111.

Here, a predetermined discharge gas may be filled in the discharge cell partitioned by the partition wall 112.

In addition, a phosphor layer 114 that emits visible light for image display may be disposed in the discharge cell partitioned by the partition wall 112. For example, red (R), green (G), and blue (B) phosphor layers may be disposed.

In addition to the red (R), green (G), and blue (B) phosphors, a white (W) and / or yellow (Y) phosphor layer may be further disposed.

In addition, the thickness of the phosphor layer 114 in at least one of the red (R), green (G), and blue (B) discharge cells may be different from other discharge cells. For example, the thickness of the phosphor layer of the green (G) discharge cell, ie the phosphor layer in the green (G) phosphor layer or the blue (B) discharge cell, ie the blue (B) phosphor layer, is It may be thicker than the thickness of the phosphor layer, ie the red (R) phosphor layer. Here, the thickness of the green (G) phosphor layer may be substantially the same as or different from the thickness of the blue (B) phosphor layer.

In the above description, only one example of the plasma display panel according to an exemplary embodiment of the present invention is illustrated and described. However, the present invention is not limited to the plasma display panel having the above-described structure. For example, the above description shows only the case where the upper dielectric layer number 104 and the lower dielectric layer number 115 are each one layer, but one or more of the upper dielectric layer or the lower dielectric layer is a plurality of layers. It is also possible to make.

In addition, although the effective address electrode 113 disposed on the rear substrate 111 may have a substantially constant width or thickness, the width or thickness inside the discharge cell may be different from the width or thickness outside the discharge cell. will be. For example, the width or thickness inside the discharge cell may be wider or thicker than that outside the discharge cell.

Next, FIG. 2 is a diagram for explaining the dummy region and the effective region.

Referring to FIG. 2, the plasma display panel may include an active area 210 in which an image is displayed and a dummy area 200 that does not contribute to the image display. Here, the effective area 210 is an area where an image is displayed by generating predetermined visible light during driving, as described in detail with reference to FIG. 1.

The dummy area 200 may be disposed outside the effective area 210. The dummy region 200 may be formed to ensure structural stability of the effective region 210 or to ensure operational stability in the effective region.

The discharge cells formed in the dummy region 200 are called dummy discharge cells, and the discharge cells formed in the effective region 210 are called effective discharge cells.

3A to 3B are diagrams for explaining the dummy address electrode.

First, referring to FIG. 3A, at least one dummy address electrode X _D1 , X _D2 , or X _D3 is disposed in a dummy region outside the effective region, and the effective address electrodes X ₁ , X ₂ , and X ₃ are disposed in the effective region. , X ₄ , X ₅ ......) are arranged.

The effective address electrodes X ₁ , X ₂ , X ₃ , X ₄ , X ₅ ... _May be connected to external driving circuits 300a and 300b.

On the other hand, at least one of the at least one dummy address electrode X _D1 , X _D2 , X _D3 is grounded (GND). Preferably, the dummy address electrode (X _D1, X _{D2, D3} X) a plurality of dummy address electrode (X _D1, X _{D2, D3} X) if multiple individuals are common.

Here, the dummy address electrodes X _D1 , X _D2 , and X _D3 may be made of substantially the same material as the effective address electrodes X ₁ , X ₂ , X ₃ , X ₄ , X ₅ ... Do.

Thus, an example of the reason for grounding the dummy address electrodes X _D1 , X _D2 and X _D3 disposed in the dummy region will be described.

Assume that the dummy address electrode is not disposed in the dummy area.

In this case, priming particles may be excessively formed in the dummy discharge cell disposed in the dummy region during driving. Then, a discharge may occur in the dummy discharge cell during driving. Accordingly, light generated by the discharge generated in the dummy discharge cell is emitted to the outside, thereby deteriorating contrast characteristics and deteriorating the image quality of the image.

On the other hand, when the dummy address electrodes X _D1 , X _D2 and X _D3 are disposed in the dummy region and the dummy address electrodes X _D1 , X _D2 and X _D3 are grounded, the priming particles in the dummy discharge cell are dummy. It flows through the address electrodes X _D1 , X _D2 , and X _D3 to ground GND, thereby preventing excessive generation of priming particles in the dummy discharge cell, thereby preventing discharge from occurring in the dummy discharge cell. It can prevent.

Next, referring to FIG. 3B, the ground electrode 310 is disposed on the front substrate 101, and the dummy address electrode 330 disposed in the dummy region of the rear substrate 111 is connected to the ground electrode through the connecting means 320. It may be electrically connected to the 310.

Here, the ground electrode 310 may be electrically connected to a cabinet (cabinet) or a heat dissipation frame (not shown), and the dummy address electrode 330 may be grounded (GND).

Next, FIGS. 4A to 4B are diagrams for explaining the interval between the scan electrode and the sustain electrode in the dummy region and the effective region.

First, referring to FIG. 4A, the distance between the scan electrode 102 and the sustain electrode 103 in the effective region is g1, and the distance between the scan electrode 102 and the sustain electrode 103 in the dummy region is g2 larger than g1. .

For example, in the case where the scan electrode 102 and the sustain electrode 103 include the transparent electrodes 102a and 103a and the bus electrodes 102b and 103b, respectively, the transparent electrode of the scan electrode 102 in the effective area. The gap g1 between the 102a and the transparent electrode 103a of the sustain electrode 103 is the gap between the transparent electrode 102a of the scan electrode 102 and the transparent electrode 103a of the sustain electrode 103 in the dummy region. is smaller than (g2).

As such, when the distance g2 between the scan electrode 102 and the sustain electrode 103 in the dummy region is greater than the distance between the scan electrode 102 and the sustain electrode 103 in the effective region, the dummy discharge cell during driving The discharge can be further prevented from occurring.

In the manufacturing process of the plasma display panel, an aging process is performed to generate an aging discharge between the scan electrode 102 and the sustain electrode 103 to stabilize the discharge gas and the phosphor layer filled in the discharge cell. Here, as described above, when the distance g2 between the scan electrode 102 and the sustain electrode 103 in the dummy region is larger than the distance between the scan electrode 102 and the sustain electrode 103 in the effective region, the dummy discharge In the cell, an aging discharge may be generated between the scan electrode 102 and the sustain electrode 103 during the aging process to stabilize the discharge gas and the phosphor layer in the dummy discharge cell. It is possible to prevent the discharge from occurring between the sustain electrodes 103.

Next, referring to FIG. 4B, unlike the case of FIG. 4A, the scan electrode 102 and the sustain electrode 103 have a single layer structure. For example, the transparent electrode is omitted (ITO-Less) structure.

As described above, even when the scan electrode 102 and the sustain electrode 103 have a single layer structure, the interval g3 between the scan electrode 102 and the sustain electrode 103 in the effective area has the scan electrode 102 in the dummy area. And smaller than the distance g4 between the sustain electrode 103.

5A to 5B are diagrams for explaining the widths of the scan electrodes and the sustain electrodes in the dummy region and the effective region.

First, referring to FIG. 5A, the width of at least one of the scan electrode 102 or the sustain electrode 103 in the effective area is greater than the width of at least one of the scan electrode 102 or the sustain electrode 103 in the dummy area. Big.

For example, if the width of the scan electrode 102 in the effective area is W1, the width of the scan electrode 102 in the dummy area is W2 smaller than W1.

As such, when the width of at least one of the scan electrode 102 and the sustain electrode 103 in the dummy area is smaller than the width of at least one of the scan electrode 102 or the sustain electrode 103 in the effective area, the dummy upon driving It is possible to further prevent the discharge from occurring in the discharge cell.

In addition, when the width of at least one of the scan electrode 102 or the sustain electrode 103 is smaller than the width of at least one of the scan electrode 102 or the sustain electrode 103 in the effective area, the dummy discharge cell Aging discharge may be generated between the scan electrode 102 and the sustain electrode 103 during the aging process to stabilize the discharge gas and the phosphor layer in the dummy discharge cell, and at the time of driving, the scan electrode 102 and the sustain electrode It is possible to prevent the discharge from occurring between the 103.

Next, referring to FIG. 5B, unlike the case of FIG. 5A, the scan electrode 102 and the sustain electrode 103 have a single layer structure. For example, a transparent electrode is omitted (ITO-Less) structure.

As described above, even when the scan electrode 102 and the sustain electrode 103 have a single layer structure, at least one of the widths Wa and Wb of the scan electrode 102 or the sustain electrode 103 in the effective area is set in the dummy area. It is preferable to be larger than the width Wc Wd of at least one of the scan electrode 102 or the sustain electrode 103 of.

Next, FIG. 6 is a diagram for explaining an example of still another structure of the scan electrode and the sustain electrode.

Referring to FIG. 6, at least one of the scan electrode 102 or the sustain electrode 103 is formed of the transparent electrodes 102a and 103a and the bus electrodes 102b and 103b in the effective area, and the scan electrode 102 in the dummy area. As for the sustain electrode 103, the transparent electrodes 102a and 103a are abbreviate | omitted and consist of bus electrodes 102b and 103b.

As such, when the transparent electrodes 102a and 103a are omitted from the scan electrode 102 and the sustain electrode 103 in the dummy region, it is possible to further prevent the discharge from occurring in the dummy discharge cell during the driving.

Next, FIG. 7 is a diagram for describing an image frame for implementing gray levels of an image in a plasma display panel according to an exemplary embodiment of the present invention.

Referring to FIG. 7, an image frame for implementing gray levels of an image in a plasma display panel according to an exemplary embodiment of the present invention may be divided into a plurality of subfields having different emission counts.

Although not shown, one or more subfields among the plurality of subfields may be grayed out according to a reset period for initializing discharge cells, an address period for selecting discharge cells to be discharged, and the number of discharges. It can be divided into the sustain period to implement.

For example, when an image is to be displayed in 256 gray scales, for example, one image frame is divided into eight subfields SF1 to SF8 as shown in FIG. 7, and each of the eight subfields SF1 to SF8, respectively. Can be subdivided into a reset period, an address period and a sustain period.

The gray scale weight of the corresponding subfield may be set by adjusting the number of the sustain signals supplied in the sustain period. That is, a predetermined gray scale weight can be given to each subfield using the sustain period. For example, the gray scale weight of each subfield is 2 ⁿ by setting the gray scale weight of the first subfield to 2 ⁰ and the gray scale weight of the second subfield to 2 ¹ (where n = 0, 1). , 2, 3, 4, 5, 6, and 7) to increase the gray scale weight of each subfield. As described above, the number of sustain signals supplied in the sustain period of each subfield is adjusted according to the gray scale weight in each subfield, thereby implementing gray levels of various images.

A plasma display panel according to an embodiment of the present invention uses a plurality of image frames to implement an image, for example, to display an image of 1 second. For example, 60 image frames are used to display an image of 1 second. In this case, the length T of one image frame may be 1/60 second, that is, 16.67 ms.

In FIG. 7, only one image frame includes eight subfields. However, the number of subfields constituting one image frame may be variously changed. For example, one video frame may be configured with 12 subfields from the first subfield to the twelfth subfield, or one video frame may be configured with 10 subfields.

In addition, in FIG. 7, subfields are arranged in an order of increasing magnitude of gray scale weight in one image frame. Alternatively, subfields may be arranged in order of decreasing gray scale weight in one image frame. Alternatively, subfields may be arranged regardless of the gray scale weight.

Next, FIG. 8 is a diagram for explaining an example of an operation of a plasma display panel according to an embodiment of the present invention in a subfield included in an image frame.

Referring to FIG. 8, in the set-up period of the reset period for initialization, the scan electrode rapidly rises from the first voltage V1 to the second voltage V2 and then from the second voltage V2 to the third voltage ( A ramp-up signal is supplied in which the voltage gradually rises up to V3). Here, the first voltage V1 may be a voltage of the ground level GND.

In this setup period, a weak dark discharge, that is, setup discharge, occurs in the discharge cell by the rising ramp signal. By this setup discharge, some wall charges can be accumulated in the discharge cells.

In a set-down period after the setup period, a ramp-down signal in the opposite polarity direction is supplied to the scan electrode after the ramp lamp signal.

Here, the falling ramp signal may gradually fall from the peak voltage of the rising ramp signal, that is, the fourth voltage V4 lower than the third voltage V3 to the fifth voltage V5.

As the falling ramp signal is supplied, a weak erase discharge, that is, a setdown discharge, occurs in the discharge cell. By this set-down discharge, wall charges such that address discharge can be stably generated in the discharge cells remain uniformly.

In the address period after the reset period, a scan bias signal that substantially maintains the lowest voltage of the falling ramp signal, that is, a voltage higher than the fifth voltage V5, for example, the sixth voltage V6, is supplied to the scan electrode.

In addition, a scan signal having a magnitude of Vy from the scan bias signal may be supplied to the scan electrode.

On the other hand, the width of the scan signal in units of subfields may vary. That is, the width of the scan signal in at least one subfield may be different from the width of the scan signal in another subfield. For example, the width of the scan signal in the subfield located later in time may be smaller than the width of the scan signal in the preceding subfield. In addition, the reduction of the scan signal width according to the arrangement order of the subfields may be made gradually, such as 2.6 Hz (microseconds), 2.3 Hz, 2.1 Hz, 1.9 Hz, or 2.6 Hz, 2.3 Hz, 2.3 Hz, 2.1 Hz. .... 1.9 ㎲, 1.9 ㎲ and so on.

As such, when the scan signal is supplied to the scan electrode, a data signal having a magnitude of Vd may be supplied to the address electrode corresponding to the scan signal.

As the scan signal and the data signal are supplied, an address discharge may be generated in the discharge cell to which the data signal is supplied while the voltage difference between the scan signal and the data signal and the wall voltage caused by the wall charges generated in the reset period are added. have.

Here, the sustain bias signal may be supplied to the sustain electrode in order to prevent the address discharge from becoming unstable due to the interference of the sustain electrode in the address period.

Here, the sustain bias signal may maintain a substantially constant sustain bias voltage Vz smaller than the voltage of the sustain signal supplied in the sustain period and greater than the voltage of the ground level GND.

Subsequently, in the sustain period for displaying an image, a sustain signal may be supplied to at least one of the scan electrode and the sustain electrode. For example, a sustain signal may be alternately supplied to the scan electrode and the sustain electrode.

When such a sustain signal is supplied, the discharge cell selected by the address discharge is added with the wall voltage in the discharge cell and the sustain voltage Vs of the sustain signal, and a sustain discharge, i.e., display between the scan electrode and the sustain electrode when the sustain signal is supplied. Discharge may occur. Then, an image may be displayed on the screen of the plasma display panel.

As such, the technical configuration of the present invention described above can be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the foregoing detailed description, and the meaning and scope of the claims are as follows. And all changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

Plasma display panel according to an embodiment of the present invention has the effect of improving the image quality of the image by preventing the discharge in the dummy discharge cell during driving by grounding the dummy address electrode disposed in the dummy region.

Claims (5)

Front substrate; A rear substrate disposed opposite the front substrate; A plurality of effective address electrodes disposed in an active area of the rear substrate; At least one dummy address electrode disposed in a dummy area outside the effective area; Including, And the at least one dummy address electrode is grounded. The method of claim 1, And a plurality of dummy address electrodes, and the plurality of dummy address electrodes are commonly grounded. The method of claim 1, Scan electrodes and sustain electrodes parallel to each other are disposed on the front substrate, And a distance between the scan electrode and the sustain electrode in the effective area of the front substrate is smaller than a distance between the scan electrode and the sustain electrode in the dummy area outside the effective area. The method of claim 1, Scan electrodes and sustain electrodes parallel to each other are disposed on the front substrate, And a width of at least one of the scan electrode or the sustain electrode in the effective area of the front substrate is greater than a width of the at least one of the scan electrode or the sustain electrode in the dummy area outside the effective area. The method of claim 1, Scan electrodes and sustain electrodes parallel to each other are disposed on the front substrate, At least one of the scan electrode or the sustain electrode in the effective area of the front substrate is made of a bus electrode and a transparent electrode, And a scan electrode and a sustain electrode in a dummy area outside the effective area.

Images