KR20060135397A - Plasma display apparatus and driving method of the same - Google Patents

Abstract

A plasma display device and a driving method thereof are provided to effectively execute discharge processes of the plasma display device by supplying pulses with different waveforms to scan and sustain electrodes. A plasma display device includes scan and sustain electrodes, a first voltage source(400), and a second voltage source(410). The first voltage source alternately applies first pulses with the opposite polarities to the scan electrodes. The second voltage source alternately applies second pulses with the opposite polarities to the sustain electrodes corresponding to the first pulses. The first voltage source has a positive voltage source and a negative voltage source. The absolute magnitude of the first pulse is greater than that of the second pulse. The second pulse is applied when applying of the first pulse is ended.

Description

Plasma Display Apparatus and Driving Method of The Same

1 is a diagram showing the structure of a typical plasma display panel.

2 is a view for explaining an arrangement structure of electrodes in a typical plasma display panel.

3 is a diagram illustrating a method of implementing image gradation of a conventional plasma display panel.

4 is a view illustrating a driving waveform according to a driving method of a conventional plasma display panel.

FIG. 5 is a diagram for explaining in detail a sustain pulse supplied in a sustain period in a conventional driving waveform; FIG.

6 is a diagram illustrating a sustain waveform for increasing the sustain voltage margin.

7 is a diagram for explaining the structure of a plasma display device according to the present invention;

8 is a diagram showing a sustain driving circuit of the plasma display device according to the present invention;

9 is a diagram showing one embodiment of a sustain driving method according to the present invention;

10 is a view showing another embodiment of a sustain driving method according to the present invention.

11 is a view showing still another embodiment of the sustain driving method according to the present invention;

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display device and a driving method of a plasma display panel which can improve driving efficiency by improving a sustain pulse supplied in a sustain period.

In general, a plasma display panel is a partition wall formed between a front panel and a rear panel to form one unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and An inert gas containing the same main discharge gas and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 illustrates a structure of a general plasma display panel.

As shown in FIG. 1, a plasma display panel includes a front panel in which a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 are arranged on a front glass 101 that is a display surface on which an image is displayed. The rear panel 110 on which the plurality of address electrodes 113 are arranged so as to intersect the plurality of sustain electrode pairs on the back glass 111 forming the back surface 100 and the rear surface is coupled in parallel with a predetermined distance therebetween. .

The front panel 100 is made of a scan electrode 102 and a sustain electrode 103, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the bus electrode b are included in pairs.

The scan electrode 102 and the sustain electrode 103 are covered by one or more upper dielectric layers 104 that limit the discharge current and insulate the electrode pairs, and to facilitate the discharge conditions on the upper dielectric layer 104 top surface. A protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

The rear panel 110 is arranged such that a plurality of discharge spaces, that is, barrier ribs 112 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 which perform address discharge to generate vacuum ultraviolet rays are arranged in parallel with the partition wall 112. On the upper side of the rear panel 110, R, G, and B phosphors 114 which emit visible light for image display during address discharge are coated. A lower dielectric layer 115 is formed between the address electrode 113 and the phosphor 114 to protect the address electrode 113.

In the plasma display panel having such a structure, a plurality of discharge cells are formed in a matrix arrangement. Such a discharge cell is formed at a point where the scan electrode or the sustain electrode intersects the above-described address electrode. The electrode arrangement for forming the plurality of discharge cells in a matrix array structure is as follows.

2 is a view for explaining an arrangement structure of electrodes in a general plasma display panel.

As shown in FIG. 2, in a typical plasma display panel 200, for example, scan electrodes Y ₁ to Yn and sustain electrodes Z ₁ to Zn are arranged side by side, and the address electrodes X ₁ to Xm intersect with each other. ) Is formed.

The driving apparatus of the plasma display panel for applying a predetermined driving signal to each of the electrodes of the plasma display panel 200 having such an arrangement structure is connected. Accordingly, a driving signal is applied to the electrodes of the plasma display panel 200 by the driving device described above to implement an image.

A method of implementing image gradation in a general plasma display panel having such a structure is shown in FIG. 3.

3 is a diagram illustrating a method of implementing image grayscale of a conventional plasma display panel.

As shown in FIG. 3, in the conventional method of expressing a gray level of a plasma display panel, a frame is divided into several sub-fields having different emission counts, and each subfield is again divided into all cells. It is divided into a reset period (RPD) for initializing them, an address period (APD) for selecting a cell to be discharged, and a sustain period (SPD) for implementing gray scale according to the number of discharges.

For example, when displaying an image with 256 gray levels, a frame period (16.67 ms) corresponding to 1/60 second is divided into eight subfields SF1 to SF8 as shown in FIG. 3, and eight subfields. Each of the SFs SF1 to SF8 is divided into a reset period, an address period, and a sustain period.

The reset period and the address period of each subfield are the same for each subfield. The address discharge for selecting the cell to be discharged is caused by the voltage difference between the address electrode X and the transparent electrode which is the scan electrode Y. The sustain period is increased at a rate of 2 ⁿ ( ^where n = 0, 1, 2, 3, 4, 5, 6, 7) in each subfield. In this way, since the sustain period is different in each subfield, the gray scale of the image is expressed by adjusting the sustain period of each subfield, that is, the number of sustain discharges. Looking at the driving waveform according to the driving method of the plasma display panel as shown in FIG.

4 is a diagram illustrating a driving waveform according to a driving method of a conventional plasma display panel.

As shown in Fig. 4, the plasma display panel erases the reset period for initializing all the cells, the address period for selecting the cells to be discharged, the sustain period for maintaining the discharge of the selected cells, and the wall charges in the discharged cells. It is divided into an erase period for driving.

In the reset period, rising ramp pulses Ramp-up are simultaneously applied to the plurality of scan electrodes Y in the setup period. This rising ramp waveform causes weak dark discharge within the full discharge cells. By this setup discharge, positive wall charges are accumulated on the address electrode X and the sustain electrode Z, and negative wall charges are accumulated on the scan electrode Y.

In the setdown period, after the rising ramp pulse is supplied, the falling ramp waveform (Ramp-down) begins to fall from the positive voltage lower than the peak voltage of the rising ramp pulse and falls to a specific voltage level below the ground (GND) level voltage. By generating a weak erase discharge in the inside, the wall charges excessively formed in the scan electrode are sufficiently erased. By this set-down discharge Y, wall charges such that the address discharge can stably occur remain uniformly in the cells.

In the address period, the negative scan pulses are sequentially applied to the scan electrodes Y, and the positive data pulses are applied to the address electrodes X in synchronization with the scan pulses. As the voltage difference between the scan pulse and the data pulse and the wall voltage generated in the reset period are added, address discharge is generated in the discharge cell to which the data pulse is applied. In the cells selected by the address discharge, wall charges are formed such that a discharge can occur when the sustain voltage Vs is applied. The positive electrode voltage Vz is supplied to the sustain electrode Z so as to reduce the voltage difference between the scan electrode Y during the set down period and the address period so that erroneous discharge with the scan electrode Y does not occur.

In the sustain period, a sustain pulse Su is applied to at least one of the scan electrode Y and the sustain electrode Z. In the cell selected by the address discharge, the sustain voltage, that is, the display discharge, is generated between the scan electrode Y and the sustain electrode Z every time the sustain pulse is applied as the wall voltage and the sustain pulse in the cell are added.

In addition, after the sustain discharge is completed, in the erase period, a voltage of an erase ramp waveform (Ramp-ers) having a small pulse width and a low voltage level is supplied to the sustain electrode to erase the wall charge remaining in the cells of the full screen. Looking at the sustain pulse supplied in the sustain period in the conventional drive waveform in more detail as shown in FIG.

FIG. 5A is a diagram for describing the sustain waveform of the sustain period in the driving waveform of FIG. 4 in more detail.

As shown in FIG. 5A, when the sustain voltage Vs is applied to the scan electrode Y while the ground level GND is applied to the sustain electrode Z, for example, the scan electrode Y Sustain discharge is generated. On the contrary, when the sustain voltage Vs is applied to the sustain electrode Z while the voltage of the ground level GND is applied to the scan electrode Y, the sustain discharge caused by the sustain electrode Z is generated.

In this way, the sustain discharge is alternately generated by the scan electrode Y and the sustain electrode Z. In addition, these conventional sustain waveforms are all equal in time difference between discharge points between respective sustain discharges alternately generated by the scan electrode Y and the sustain electrode Z. FIG.

For example, assuming that one sustain discharge has occurred at a time of 10 microseconds (microseconds), the next sustain discharge occurs at 11 microseconds (microseconds), and then the sustain discharge has 12 microseconds (microseconds). The difference in time between the discharge points between each sustain discharge in the order of 13 ms (microseconds) and then 14 ms (microseconds) is the same as 1 ms (microseconds). Such sustain discharges can be said to actually occur continuously.

Such a sustain discharge is a main display discharge of the plasma display panel, which enables the phosphor layer in the discharge cell to emit relatively strong light with a high intensity discharge.

5B is a view for explaining the discharge in accordance with the application of the sustain pulse in more detail.

As shown in the figure, a certain amount of time must pass after the sustain pulse is applied to form a discharge. After the discharge is formed, the sustain pulse plays a role of maintaining the discharge. Infrared (IR) emission amount during discharge has a maximum value.

On the other hand, as described above, during sustain driving of the AC surface discharge plasma display device, the same square wave is alternately applied to the sustain electrode and the scan electrode, thereby maintaining the discharge. When the square wave is applied to the electrode to form the discharge, the square wave voltage level of the time when the initial discharge is formed and the period in which the discharge is maintained is the same.

However, if a higher voltage is applied at the instant of the discharge, the discharge may be more easily formed, thereby improving the voltage margin. The voltage margin generally means the interval between the discharge ignition timing voltage value and the discharge erasing timing voltage value.

In the case of the R, G, and B cells, the discharge is performed in different voltage regions, and when the driving margin is narrow, it is difficult to simultaneously discharge the R, G, and B cells to realize the desired color. Therefore, the wider the driving margin, the easier the discharge of the R, G, and B cells having different discharge start values. On the other hand, in the rectangular waveform as described above, the voltage difference between the discharge formation section and the sustain section does not occur.

6 is a diagram illustrating a sustain waveform for increasing the sustain voltage margin.

In order to overcome the limitations of the driving method shown in FIG. 5, the driving method as shown in FIG. 6 is proposed. The sustain waveform shown in FIG. 6 is implemented to set the voltage during the period in which the discharge is formed to be higher than the conventional sustain voltage, and to maintain the voltage lower than the discharge formation period in the sustain period after the discharge is formed.

When the modified sustain pulse is applied, discharge formation becomes easier, while discharge efficiency can be maintained as in the prior art. Therefore, it is possible to improve the voltage margin under conditions requiring high voltage but high efficiency such as high Xe. However, in order to apply one sustain pulse to the discharge formation section and the discharge sustaining section as shown in the waveform shown in FIG. 6, there is a problem of implementing a discharge formation section having a very short period, that is, a narrow width.

SUMMARY OF THE INVENTION The present invention solves the above-described problems, and by providing different periods and voltage levels of the sustain pulses applied to the Y electrode and the Z electrode, the sustain drive can increase sustain voltage margin and realize efficient discharge. An object of the present invention is to provide a plasma display device having a circuit and a driving method thereof.

Plasma display device according to an aspect of the present invention comprises a scan electrode and a sustain electrode; A first power supply unit alternately applying first pulses having different polarities to the scan electrodes; And a second power supply unit applying a second pulse having a different polarity to the sustain electrode corresponding to the first pulse.

The first power supply unit is characterized in that it comprises a positive power supply and a negative power supply separately.

The second power supply unit is characterized in that it comprises a positive power supply and a negative power supply separately.

The magnitude of the first pulse is greater than the magnitude of the second pulse.

The width of the first pulse is smaller than the width of the second pulse.

The second pulse may be applied at a time point when the application of the first pulse is terminated.

The first pulse and the second pulse has a different polarity.

The second pulse may be applied simultaneously with the application of the first pulse.

According to another aspect of the present invention, a plasma display device includes a scan electrode and a sustain electrode; And applying a first pulse to the scan electrode, and applying a second pulse having the same polarity as the first pulse and having a pulse width and magnitude smaller than the first pulse to the sustain electrode in correspondence with the first pulse. Characterized in that it comprises a sustain pulse control unit.

The second pulse may be applied after the first pulse is applied.

According to an aspect of the present invention, there is provided a method of driving a plasma display device, the method comprising: alternately applying a first pulse having a different polarity from a first power source to the scan electrode; And

And corresponding to the first pulse, applying a second pulse having a different polarity from the second power supply to the sustain electrode.

Another aspect of the plasma display device driving method according to the present invention comprises the steps of applying a first pulse to the scan electrode; And applying a second pulse having the same polarity as the first pulse and having a smaller pulse width and magnitude than the first pulse to the sustain electrode corresponding to the first pulse.

7 is a view for explaining the structure of the plasma display device according to the present invention.

As shown in FIG. 7, the plasma display apparatus of the present invention includes scan electrodes Y ₁ to Yn and sustain electrodes Z, and a plurality of address electrodes X ₁ to X that intersect the scan electrodes and sustain electrodes Z. As shown in FIG. Xm). The frame may be formed by a combination of at least one subfield in which driving pulses are applied to the address electrodes X ₁ to Xm, the scan electrodes Y ₁ to Yn, and the sustain electrode Z in the reset period, the address period, and the sustain period. The plasma display panel 300 representing an image including the image, the data driver 302 for supplying data to the address electrodes X ₁ to Xm formed in the plasma display panel 300, and the scan electrodes Y _1. Scan driver 303 for driving Yn), sustain driver 304 for driving sustain electrodes Z serving as common electrodes, and scan driver 303 and sustain driver 304 described above in the sustain period. It includes a sustain pulse control unit 301 for controlling the.

Here, the aforementioned plasma display panel 300 is bonded to the front panel (not shown) and the rear panel (not shown) at regular intervals, and a plurality of electrodes, for example, scan electrodes (Y ₁ to Yn) and sustain. A plurality of sustain electrodes including the electrodes Z are formed, and the address electrodes X ₁ to Xm are formed to intersect the sustain electrodes including the scan electrodes Y ₁ to Yn and the sustain electrode Z. .

The scan driver 303 supplies the rising ramp waveform Ramp-up to the scan electrodes Y ₁ to Yn during the setup period during the reset period under the control of a timing controller (not shown), and also during the set down period of the reset period. The falling ramp waveform Ramp-down is supplied to the scan electrodes Y ₁ to Yn. In addition, the scan driver 303 sequentially supplies scan voltages to the scan electrodes Y ₁ to Yn during the address period, and applies sustain pulses to the scan electrodes Y under the control of the sustain pulse controller 301 during the sustain period. ₁ to Yn).

The sustain driver 304 supplies a bias voltage to the sustain electrodes Z during one or more of a set down period or an address period under the control of a timing controller (not shown), and the scan driver under the control of the sustain pulse controller 301 in the sustain period. In operation alternately with 303, a sustain pulse is supplied to the sustain electrodes Z.

The data driver 301 is subjected to inverse gamma correction and error diffusion by an inverse gamma correction circuit, an error diffusion circuit, and the like, and then is supplied with image data mapped to each subfield by a subfield mapping circuit. The field-mapped image data is supplied to the corresponding address electrode X, respectively.

The sustain pulse control unit 301 controls the operations of the scan driver 303 and the sustain driver 304 described above in the sustain period.

In particular, the sustain pulse controller 301 according to the present invention controls the scan driver 303 and the sustain driver 304 as described above, so that the sustain pulse controller 301 has different polarities on the scan electrode Y or the sustain electrode Z during the sustain period. Supply sustain pulses alternately. As described above, a sustain voltage, that is, a sustain pulse is formed between the scan electrode Y and the sustain electrode Z, thereby discharging. The present invention makes it easy to implement a section, i.e., a narrow width, which is difficult to implement when a sustain pulse is applied.

8 is a view showing a sustain driving circuit of the plasma display device according to the present invention.

As described above, the present invention is characterized by alternately supplying sustain pulses having different polarities to the scan electrode and the sustain electrode. The sustain driving circuit according to the present invention includes a first power supply unit 400 for supplying a sustain pulse to the scan electrode and a second power supply unit 410 for supplying the sustain pulse to the sustain electrode.

The first power supply unit 400 supplies a first positive power supply voltage V ₁ and a first negative power supply voltage −V ₁ to the scan electrode, and the second power supply unit 410 is provided with a first power supply voltage V ₁ . It serves to supply a positive supply voltage (V ₂ ) and a second negative supply voltage (-V ₂ ) to the sustain electrode. In this case, an external circuit connected to the first power supply unit 400 and the second power supply unit 410 may mainly include an energy recovery circuit.

In order to apply a positive sustain pulse from the first power supply unit 400 to the scan electrode, the first switch SW1 402 connected to the first positive voltage source V ₁ is short-circuited and turned on. The second switch SW2 404 connected to the voltage source -V ₁ and the third switch SW3 406 connected to the ground GND are open (OFF).

In addition, in order to apply a negative sustain pulse to the scan electrode from the first power supply 400, the second switch (SW2) 404 connected to the first negative voltage source (-V ₁ ) is shorted (ON), The first switch SW1 402 connected to the first positive voltage source V ₁ and the third switch SW3 406 connected to the ground GND are turned OFF.

In the same manner as described above, a sustain pulse having a desired polarity may be applied to the sustain electrode from the second power supply 410. That is, in order to apply the positive sustain pulse from the second power supply unit 410 to the sustain electrode, the fourth switch SW4 412 connected to the second positive voltage source V ₂ is shorted (ON), and the second The fifth switch (SW5) 414 connected to the negative voltage source (-V ₂ ) and the sixth switch (SW6) 416 connected to the ground (GND) are opened (OFF).

In addition, in order to apply a negative sustain pulse from the second power supply 410 to the sustain electrode, the fifth switch (SW2) 414 connected to the second negative voltage source (-V ₂ ) is shorted (ON), The fourth switch SW4 412 connected to the second positive voltage source V ₂ and the sixth switch SW6 416 connected to the ground GND are turned off. The sustain pulse control unit according to the present invention controls the sustain driving circuit as described above, so that the desired sustain pulse can be applied to the scan electrode and the sustain electrode.

9 is a view showing an embodiment of a sustain driving method according to the present invention.

As shown in FIG. 9, positive and negative sustain pulses having a pulse width of t1 and a magnitude of an absolute value V ₁ are alternately applied to the scan electrode. In addition, the sustain electrode has t2 Positive and negative sustain pulses having a pulse width of and an absolute value of V ₂ are applied alternately. At this time, when setting the magnitude of the sustain pulse, the magnitude of the absolute value V ₁ is greater than the magnitude of the absolute value V ₂ , and the pulse width t1. Is set to be larger than t2.

Accordingly, at the initial stage of discharge, a relatively high voltage V ₁ is applied to facilitate discharge, while a relatively low voltage V ₂ is applied during the discharge sustain period to reduce power consumption. If the value of t1 is close to or larger than the value of t2, the power consumption due to the discharge is increased. Therefore, t1 is preferably set to have a range of 200 ns or more and 1 ms or less. Typically 200 ns is the minimum time for discharge generation and 1 ㎲ corresponds to a half value of 2 ㎲ typical holding time.

One embodiment of the sustain driving method according to the present invention is characterized in that the sustain pulse applied to the sustain electrode is applied at the end of the application of the sustain pulse applied to the scan electrode.

That is, the first positive voltage V ₁ at the scan electrode. When it is applied for t1 time, the second negative voltage (-V ₂ ) is applied for t2 time at the end of V ₁ application. At this time, a voltage difference of V ₁ is formed between the scan electrode and the sustain electrode, and a voltage difference of 0 − (− V ₂ ) = V ₂ is formed after t2 hours.

As a result, a discharge is formed between the scan electrode and the sustain electrode by the voltage difference of V ₁ , and the discharge can be maintained by the voltage difference of V ₂ .

10 is a view showing another embodiment of a sustain driving method according to the present invention.

As shown in FIG. 10, positive and negative sustain pulses having a pulse width of t1 and a magnitude of an absolute value V ₁ are alternately applied to the scan electrode. In addition, the sustain electrode has t1 + t2 Positive and negative sustain pulses having a pulse width of and an absolute value of V ₂ are applied alternately.

At this time, the magnitude of the absolute value of V ₁ is not required to be greater than the absolute value of V _2. That is, the absolute value of V ₁ is summed with the sustain pulse having a magnitude of the absolute value of V ₂ is sufficient to have the magnitude of which may form a discharge.

Accordingly, V ₁ -(-V ₂ ) = t1 time between the scan electrode and the sustain electrode. A voltage difference of V ₁ + V ₂ is formed, and then a voltage difference of 0-(− V ₂ ) = V ₂ is formed during t2 hours.

As a result, a discharge is formed between the scan electrode and the sustain electrode by the voltage difference of V ₁ + V ₂ , and the discharge is maintained by the voltage difference of V ₂ .

In Fig. 10, and is secured a drive margin at a low voltage possible since the magnitude of the absolute value of V ₁ even greater than the absolute value of V ₂ as described above. That is, another embodiment of the sustain driving method according to the present invention, by applying a low voltage initial discharge pulse (V ₁ ) and a low voltage discharge sustain pulse (V ₂ ) having a different polarity to the scan electrode and the sustain electrode, It is possible to form and maintain the discharge by the low voltage.

Moreover, narrower implementations, which are difficult to implement in practice, can be easily achieved. That is, as described above, the difficulty of applying pulses having different values from the same voltage source to the same electrode can be avoided.

11 is a view showing still another embodiment of the sustain driving method according to the present invention.

Unlike FIG. 9 and FIG. 10, FIG. 11 shows that only positive pulses are applied to the scan electrode and the sustain electrode. Therefore, in FIG. 11, a positive sustain pulse is applied to the scan and sustain electrodes from a positive voltage source without using a negative voltage source or without a negative voltage source.

As shown, the scan electrode has t1 + t2 A positive sustain pulse having a pulse width of and an magnitude of absolute value V ₁ is applied. In addition, a positive sustain pulse having a pulse width of t2 and a magnitude of an absolute value V ₂ is applied to the sustain electrode.

At this time, the magnitude of the absolute value V ₁ is a value having a sufficient magnitude that the discharge can easily occur, and must be larger than the magnitude of the absolute value V ₂ , which is a value for maintaining the discharge.

While, when the scan electrodes and the sustain pulse applied to the positive polarity to the sustain electrode, the scan electrode and the sustain electrode between the t1 interval, as described above V ₁ - 0 = A voltage difference of V ₁ is formed, and then a voltage difference of V ₁ -V ₂ is formed during the t2 period. As a result, a discharge is formed between the scan electrode and the sustain electrode by the voltage difference of V ₁ , and the discharge is maintained by the voltage difference of V ₁ -V ₂ .

The technical spirit of the present invention has been described above with reference to the accompanying drawings, but this is by way of example only and not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

According to the present invention, by applying pulses having different waveforms to the scan electrode and the sustain electrode, respectively, the sustain voltage margin is increased, and the difficulty of implementing the narrow width is solved, thereby enabling efficient discharge.

Claims (32)

Scan electrodes and sustain electrodes; A first power supply unit alternately applying first pulses having different polarities to the scan electrodes; And And a second power supply unit applying a second pulse having different polarities to the sustain electrode in correspondence to the first pulse. The plasma display apparatus of claim 1, wherein the first power supply unit includes a positive power supply and a negative power supply separately. The plasma display apparatus of claim 1, wherein the second power supply unit includes a positive power supply and a negative power supply separately. The plasma display apparatus of claim 1, wherein the magnitude of the first pulse is greater than the magnitude of the second pulse. The plasma display apparatus of claim 1, wherein a width of the first pulse is smaller than a width of the second pulse. The plasma display apparatus of claim 1, wherein the second pulse is applied when the application of the first pulse is terminated. The plasma display apparatus of claim 1, wherein the first pulse and the second pulse have different polarities. Scan electrodes and sustain electrodes; A first power supply unit having a positive power supply and a negative power supply separately and alternately applying first pulses having different polarities to the scan electrodes; And And a second power supply unit having a positive power supply and a negative power supply separately, and applying a second pulse having a different polarity to the sustain electrode corresponding to the first pulse. The plasma display apparatus of claim 8, wherein the second pulse is applied simultaneously with the application of the first pulse. The plasma display apparatus of claim 8, wherein the width of the first pulse is smaller than the width of the second pulse. The plasma display apparatus of claim 8, wherein the magnitude of the absolute value of the first pulse is smaller than the magnitude of the absolute value of the second pulse. Scan electrodes and sustain electrodes; And First pulses having different polarities are alternately applied to the scan electrodes, And a sustain pulse controller for applying a second pulse having a different polarity to the sustain electrode in correspondence with the first pulse. The plasma display apparatus of claim 12, wherein the magnitude of the first pulse is smaller than the magnitude of the second pulse.  The plasma display apparatus of claim 12, wherein the width of the first pulse is smaller than the width of the second pulse. The plasma display apparatus of claim 12, wherein the second pulse is applied at a time point when the application of the first pulse is terminated. The plasma display apparatus of claim 15, wherein the first pulse and the second pulse have different polarities. The plasma display apparatus of claim 12, wherein the second pulse is applied simultaneously with the application of the first pulse. The plasma display apparatus of claim 12, wherein the magnitude of the absolute value of the first pulse is smaller than the magnitude of the absolute value of the second pulse. Scan electrodes and sustain electrodes; And Applying a first pulse to the scan electrode, And a sustain pulse control unit configured to apply a second pulse having the same polarity as that of the first pulse and having a smaller pulse width and magnitude than the first pulse to the sustain electrode in correspondence with the first pulse. Plasma display device. The plasma display apparatus of claim 19, wherein the second pulse is applied after the first pulse is applied. Alternately applying a first pulse having a different polarity from the first power supply to the scan electrode; And And applying a second pulse having a different polarity from the second power supply unit to the sustain electrode in correspondence to the first pulse. The method of claim 21, wherein the first power supply unit includes a positive power supply and a negative power supply separately. The method of claim 21, wherein the second power supply unit includes a positive power supply and a negative power supply separately. 22. The method of claim 21, wherein the magnitude of the first pulse is smaller than the magnitude of the second pulse. 22. The method of claim 21, wherein the width of the first pulse is smaller than the width of the second pulse. The method of claim 21, wherein the second pulse is applied when the application of the first pulse is terminated. 22. The method of claim 21, wherein the first pulse and the second pulse have different polarities. The method of claim 21, wherein the second pulse is applied simultaneously with the application of the first pulse. 29. The method of claim 28, wherein the width of the first pulse is smaller than the width of the second pulse. 30. The method of claim 29, wherein the magnitude of the absolute value of the first pulse is smaller than the magnitude of the absolute value of the second pulse. Applying a first pulse to the scan electrode; And And applying a second pulse having the same polarity as the first pulse and having a smaller pulse width and magnitude than the first pulse to the sustain electrode corresponding to the first pulse. Driving method. 32. The method of claim 31, wherein the second pulse is applied after the first pulse is applied.

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