KR20080061000A - Plasma display panel - Google Patents

Abstract

A plasma display panel is provided to suppress crosstalk by varying the length of an overlapping interval of successive two scan signals based on the amount of data variation. A plasma display panel includes scan and sustain electrodes(102,103) in parallel and address electrodes(113) across the scan and sustain electrodes. Scan signals are supplied to the scan electrodes and data signals are supplied to the address electrodes corresponding to the scan electrodes during an address period of a sub-field. In a second sub-field having the amount of data variation from a first sub-field, the length of an overlapping interval of successive two scan signals is different from the first sub-field.

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.

FIG. 2 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. FIG.

3 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;

4A to 4B are diagrams for explaining an example of a method of superimposing two consecutive scan signals.

FIG. 5 is a diagram for explaining another example of a method of superimposing two consecutive scan signals. FIG.

6 is a view for explaining an example of a method of changing the length of the overlapping period of the scan signal by changing the length of the voltage rising period.

7 is a view for explaining an example of a method of changing the length of the overlapping period of the scan signal by changing the length of the voltage drop period.

<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: address electrode

114: phosphor layer 115: lower dielectric layer

112a: vertical bulkhead 112b: horizontal bulkhead

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 stabilizes driving by changing the length of the overlapping period of two consecutive scan signals in relation to the amount of data change.

A plasma display panel according to an embodiment of the present invention includes scan electrodes and sustain electrodes that cross each other, and address electrodes intersecting the scan electrodes and the sustain electrodes, and scan signals to the scan electrodes in an address period of a subfield. Is supplied, and a data signal is supplied to the address electrode corresponding to the scan electrode, and in the second subfield where the amount of change in the data signal is different from the first subfield, the length of the overlapping period of two consecutive scan signals is equal to the first subfield. Is different from

The amount of change in the data signal is the number of changes in the voltage level of the data signal.

In addition, the length of the overlap period is 50% or less of the pulse width of the scan signal.

In addition, the amount of change of the data signal in the second subfield is smaller than that of the first subfield, and the length of the overlap period of two consecutive scan signals in the second subfield is longer than that of the first subfield.

Also, the length of the voltage rise period of the scan signal in the second subfield is longer than the first subfield.

Also, at least one of the plurality of subfields does not overlap two consecutive scan signals.

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 back substrate 111 on which the address electrode 113 intersecting the scan electrode 102 and the sustain electrode 103 is disposed is bonded to each other.

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 having a color darker than that of the scan electrode 102 and the sustain electrode 103 between the front substrate 101 and the scan electrode 102 and the sustain electrode 103. It is also possible to be arranged. 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.

The scan signal is supplied to the scan electrode 102 in the address period of the subfield.

A dielectric layer covering the scan electrode 102 and the sustain electrode 103 may be disposed on the front substrate 101 on which the scan electrode 102 and the sustain electrode 103 are disposed, for example, the upper dielectric layer 104. .

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 address electrode 113, is disposed on the rear substrate 111. In the address period of the subfield, the address electrode 113 is supplied with a data signal corresponding to the scan signal supplied to the scan electrode 102.

A dielectric layer covering the address electrode 113, for example, a lower dielectric layer 115 may be disposed on the rear substrate 111 on which the address electrode 113 is disposed.

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

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 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.

Although the widths of the red (R), green (G), and blue (B) discharge cells in the plasma display panel according to the embodiment of the present invention may be substantially the same, the red (R), green (G), and blue colors may be substantially the same. (B) The width of at least one of the 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 may include a horizontal partition wall 112b and a vertical partition wall 112a, where a differential partition wall structure in which the height of the horizontal partition wall 112b and the height of the vertical partition wall 112a are different from each other may be possible. .

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

In FIG. 1, red (R), green (G), and blue (B) discharge cells are shown and described as being arranged on the same line, but may be arranged in other shapes. 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 is filled in the discharge cell partitioned by the partition wall 112. For example, gases such as argon (Ar), neon (Ne), and xenon (Xe) are filled as discharge gas.

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. Therefore, 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 width or thickness of the address electrode 113 disposed on the rear substrate 111 may be substantially constant, the width or thickness inside the discharge cell may be different from the width or thickness outside the discharge cell. . 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 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. 2, 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. 2, 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.

The 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. 2, only one image frame is composed of 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. 2, the subfields are arranged in the order of increasing magnitude of gray scale weight in one image frame. Alternatively, the 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. 3 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. 3, 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 may accumulate in the discharge cell.

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.

4A to 4B are diagrams for explaining an example of a method of superimposing two consecutive scan signals.

First, referring to FIG. 4A, in the first subfield, the scan signal supplied to the Ya scan electrode and the scan signal supplied to the Yb scan electrode are overlapped for the period d1 as shown in (a).

In addition, in the second subfield different from the first subfield, the scan signal supplied to the Ya scan electrode and the scan signal supplied to the Yb scan electrode are overlapped for a d2 period longer than the d1 period in (a). .

Here, the amount of data change in the second subfield having a relatively long length of the overlapping period of two consecutive scan signals is smaller than the amount of data change in the first subfield. Referring to FIG. 4B, the amount of data change is as follows.

Referring to FIG. 4B, in (a), the second scan electrode Y2, the fourth scan electrode Y4, and the sixth scan electrode Y from the first scan electrode Y1 to the eighth scan electrode Y8. The discharge cells disposed on the scan electrode Y6 and the eighth scan electrode Y8 are in an on state, and the first scan electrode Y1, the third scan electrode Y3, the fifth scan electrode Y5, and the seventh scan electrode are on. The case where the discharge cell arrange | positioned on the scan electrode Y7 is an off state is shown.

In this case, the data signals supplied to the address electrodes X are low, second and fourth in the discharge cells arranged on the first, third, fifth and seventh scan electrodes Y1, Y3, Y5 and Y7. The discharge cells arranged on the 6, 8 scan electrodes Y2, Y4, Y6, and Y8 have a high level. That is, the data signal has a pattern in which voltage levels are repeated with low and high. In this case, the number of voltage changes in the data signal is relatively large.

Here, the number of changes in the voltage level of the data signal can be regarded as the amount of data change. Then, in the case of (a) of FIG. 4B, the amount of data change is relatively large.

In addition, (b) shows the case where all the discharge cells arrange | positioned on the scan electrode Y from the 1st scan electrode Y1 to the 8th scan electrode Y8 are all on states.

In this case, the data signal supplied to the address electrode X has a high level in all discharge cells. That is, the data signal has a pattern in which the voltage level is kept high. In this case, the number of voltage changes in the data signal is relatively small. That is, in the case of FIG. 4B (b), the amount of data change is relatively small.

When the amount of data change is relatively small as shown in (b) of FIG. 4B, the length d2 of the overlapping period of two consecutive scan signals as shown in the second subfield of FIG. It is longer than the length of the overlap period d1 in one subfield.

As described above, the reason why the length of overlapping periods of two consecutive scan signals are relatively long when the amount of data change is relatively small is as follows.

In the case where the amount of data change is relatively large as shown in (a) of FIG. 4B, there is a greater probability that two adjacent discharge cells have different states than in the case of (b). In more detail, in the case of (a), one of two adjacent discharge cells is in an on state, and the probability of being in an off state is greater than in the case of (b).

Accordingly, in the case of (a), the priming particles generated in the discharge cell in the on state move to the discharge cell in the off state, and thus crosstalk in which discharge occurs in the discharge cell to be in the off state. -talk) is more likely to occur than in (b).

In addition, when the length of the overlapping period of two consecutive scan signals is relatively long, there is a possibility that priming particles generated in the discharge cell by the first scan signal remain in the discharge cell until the second scan signal is supplied. Relatively large. Accordingly, the probability of crosstalk phenomenon is relatively high.

On the other hand, if the length of the overlapping period of two consecutive scan signals is relatively short, there is a relatively high possibility that priming particles generated in the discharge cell by the first scan signal are erased before the second scan signal is supplied. Big.

Considering the above, in the case of (a) where the probability of crosstalk phenomenon is relatively high, the length of the period in which two consecutive scan signals overlap is relatively shorter than in the case of (b). It is preferable to suppress the occurrence.

On the other hand, in the case of (b) where the probability of the crosstalk phenomenon is relatively small, the occurrence of crosstalk is prevented even when the length of the period where two consecutive scan signals overlap is relatively longer than in the case of (a). It is possible to sufficiently suppress the priming particles generated in the discharge cell and to improve the discharge efficiency.

As described above, when adjusting the length of overlapping periods of two consecutive scan signals, setting the threshold change amount and changing the length of the overlapping periods of two successive scan signals when the data change amount is out of the threshold change amount. It is possible.

For example, it is possible to reduce the length of the overlapping period of two consecutive scan signals in the subfield where the amount of data change exceeds the threshold amount of change. Alternatively, the length of the overlapping period of two consecutive scan signals may be increased in the subfield in which the amount of data change is less than the threshold amount of change.

If the length of the overlapping period of two consecutive scan signals is excessively long, the amount of priming particles remaining in the discharge cell may be excessive and the occurrence of crosstalk may increase, while the overlapping period of two consecutive scan signals is increased. When the length of V is excessively short, the amount of priming particles in the discharge cell is insufficient, and driving efficiency may decrease. In consideration of this, the length of the overlapping period of two consecutive scan signals is preferably 50% or less of the pulse width W of the scan signal.

Next, FIG. 5 is a diagram for explaining another example of a method of superimposing two consecutive scan signals.

Referring to FIG. 5, in the case of the first subfield having a relatively large amount of data change, as shown in (a), the scan signal supplied to the Ya scan electrode and the scan signal supplied to the Yb scan electrode do not overlap each other, and are spaced apart for a d3 period. do.

On the other hand, in the case of the second subfield having a relatively small amount of data change, as shown in (b), the scan signal supplied to the Ya scan electrode and the scan signal supplied to the Yb scan electrode may overlap during the d4 period.

As described above, two consecutive scan signals may not overlap each other in at least one subfield having a relatively large amount of data change among the plurality of subfields.

6 is a view for explaining an example of a method of changing the length of the overlapping period of the scan signal by changing the length of the voltage rising period.

Referring to FIG. 6, in the case of the first subfield having a relatively large amount of data change as shown in (a), the scan signal supplied to the Ya scan electrode and the scan signal supplied to the Yb scan electrode overlap for the d5 period.

In addition, the scan signal includes a voltage drop period, a voltage sustain period, and a voltage rise period, and in the first subfield of (a), the length of the voltage rise period of the scan signal is W1.

On the other hand, in the case of the second subfield having a relatively small amount of data change, as shown in (b), the scan signal supplied to the Ya scan electrode and the scan signal supplied to the Yb scan electrode overlap for the d6 period longer than the d5 period. The length of the voltage rise period of the scan signal is W2 longer than W1.

Here, in FIG. 6, the length of the voltage drop period and the voltage sustain period of the scan signal in the case of (a) may be substantially the same as the length of the voltage drop period and the voltage sustain period of the scan signal in the case of (b).

As described above, by changing the length of the voltage rising period of the scan signal, the length of the overlapping period of two consecutive scan signals can be changed.

Next, FIG. 7 is a diagram for explaining an example of a method of changing the length of the overlapping period of the scan signal by changing the length of the voltage drop period.

Referring to FIG. 7, in the case of the first subfield having a relatively large amount of data change as shown in (a), the scan signal supplied to the Ya scan electrode and the scan signal supplied to the Yb scan electrode overlap for the period d7, and the scan signal The length of the voltage drop period of is W3.

On the other hand, in the case of the second subfield having a relatively small amount of data change as shown in (b), the scan signal supplied to the Ya scan electrode and the scan signal supplied to the Yb scan electrode overlap for a d8 period longer than the d7 period. The voltage drop period of the scan signal is W4 longer than W3.

In FIG. 7, the length of the voltage rising period and the voltage holding period of the scan signal in the case of (a) may be substantially the same as the length of the voltage raising period and the voltage holding period of the scan signal in the case of (b).

As described above, by changing the length of the voltage drop period of the scan signal, the length of the overlapping period of two consecutive scan signals can be changed.

Although not shown, it is also possible to vary the length of overlapping periods of two consecutive scan signals by changing the length of the voltage rising period and the voltage falling period of the scan signal together.

It is also possible to vary the length of the overlapping period of two consecutive scan signals by changing the length of the voltage sustain period of the scan signal, and at least one of the voltage drop period, the voltage sustain period, and the voltage rise period of the scan signal. It is also possible to vary the length of the overlapping period of two consecutive scan signals by changing the length.

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 suppressing the occurrence of crosstalk and improving the driving efficiency by changing the length of the overlapping period of two consecutive scan signals in relation to the amount of data change.

Claims (6)

Scan electrodes and sustain electrodes An address electrode intersecting the scan electrode and the sustain electrode Including, In the address period of a subfield, a scan signal is supplied to the scan electrode, and a data signal is supplied to the address electrode corresponding to the scan electrode. And a second subfield in which the amount of change of the data signal is different from the first subfield is different in length of the overlapping period of two consecutive scan signals from the first subfield. The method of claim 1, And the amount of change of the data signal is a number of changes in the voltage level of the data signal. The method of claim 1, And a length of the overlap period is 50% or less of a pulse width of the scan signal. The method of claim 1, The amount of change of the data signal in the second subfield is smaller than the first subfield, and the plasma display has a longer length of overlapping period of the two consecutive scan signals in the second subfield than the first subfield. panel. The method of claim 4, wherein And a length of a voltage rising period of the scan signal in the second subfield is longer than the first subfield. The method of claim 1, And the continuous two scan signals do not overlap in at least one of the plurality of subfields.

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