KR20050018529A - A plasma display panel and a diriving method of the same - Google Patents

Abstract

PURPOSE: A plasma display panel and a method for driving the same are provided to perform the stable floating operation without affecting the adjacent line by individually controlling the output terminal of the scan driving unit. CONSTITUTION: A plasma display panel includes a first electrode, a second electrode, a first space and a driving circuit(Y electrode driver). The first space is defined by the first electrode and the second electrode. The driving circuit transmits the driving signal to the first electrode and the second electrode during the reset period. The driving circuit floats the first electrode after the first space is discharged by applying the first voltage to the first electrode and makes all of the output terminals of the driving circuit a high impedance state during the floating.

Description

Plasma display panel and driving method thereof {A PLASMA DISPLAY PANEL AND A DIRIVING METHOD OF THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (PDP) and a driving method thereof, and more particularly to a method of driving a reset waveform of a plasma display panel.

Recently, flat display devices such as liquid crystal displays (LCDs), field emission displays (FEDs), and PDPs have been actively developed. Among these flat panel display devices, PDPs have advantages of higher luminance and luminous efficiency and wider viewing angles than other flat panel display devices. Therefore, the PDP is in the spotlight as a display device to replace the conventional cathode ray tube (CRT) in a large display device of 40 inches or more.

PDPs are flat display devices that display characters or images using plasma generated by gas discharge, and dozens to millions or more of pixels are arranged in a matrix according to their size. Such PDPs are classified into a direct current type (DC type) and an alternating current type (AC type) according to the shape of the driving voltage waveform applied and the structure of the discharge cell.

In the DC-type PDP, since the electrode is exposed to the discharge space as it is, the current flows in the discharge space while voltage is applied, and there is a disadvantage in that a resistance for current limitation must be made for this purpose. On the other hand, in the AC type PDP, the electrode covers the dielectric layer, so the current is limited by the formation of a natural capacitance component, and the electrode is protected from the impact of ions during discharge.

1 is a partial perspective view of an AC plasma display panel.

As shown in FIG. 1, the scan electrode 4 and the sustain electrode 5 covered with the dielectric layer 2 and the protective film 3 are arranged in parallel on the first substrate 1. A plurality of address electrodes 8 covered with the insulator layer 7 are provided on the second substrate 6. A partition 9 is formed on the insulator layer 7 between the address electrodes 8 in parallel with the address electrode 8. In addition, the phosphor 10 is formed on the surface of the insulator layer 7 and on both side surfaces of the partition wall 9. The first substrate 1 and the second substrate 6 may be arranged with the discharge space 11 therebetween so that the scan electrode 4 and the address electrode 8 and the sustain electrode 5 and the address electrode 8 are orthogonal to each other. It is arranged toward. The discharge space at the intersection of the address electrode 8 and the pair of the scanning electrode 4 and the sustain electrode 5 forms a discharge cell 12.

2 shows an electrode arrangement diagram of a plasma display panel.

As shown in Fig. 2, the PDP electrode has a matrix structure of m x n. Specifically, the address electrodes A1 to Am are arranged in the column direction, and the scan electrodes Y1 to n rows in the row direction. Yn) and sustain electrodes X1 to Xn are arranged in a zigzag. Hereinafter, the scanning electrode will be referred to as "Y electrode" and the sustain electrode as "X electrode". The discharge cell 12 shown in FIG. 2 corresponds to the discharge cell 12 shown in FIG.

According to a general driving method of the PDP, one frame is divided into a plurality of subfields, and each subfield includes a reset section, an address section, and a sustain section.

The reset section (initialization section) serves to erase the wall charge state of the previous sustain discharge and to set up the wall charge in order to stably perform the next address discharge. That is, the reset section serves to create an optimal wall charge state for the address operation in the subsequent address section.

The address section selects the cells that are turned on and the cells that are not turned on in the panel to accumulate wall charges in the cells that are turned on (addressed cells), and the sustain section performs discharge for actually displaying an image on the addressed cells. do.

 Conventionally, a ramp waveform is applied as described in US Pat. No. 5,745,086 as a driving method of the reset section.

That is, in the related art, in order to control the wall charge of each electrode in the reset period, the rising ramp and the falling ramp waveforms are slowly applied to the Y electrode. However, when the ramp waveform is applied as in the related art, since the control accuracy of the wall charge is strongly dependent on the inclination of the lamp, there is a problem that a considerable time is required for initialization to precisely control the wall charge.

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve such a problem of the related art, and to provide a plasma display panel and a driving method thereof for performing initialization in a short time.

A driving method of a plasma display panel according to an aspect of the present invention for achieving the above object,

A method of driving a plasma display panel including a first space driven by a driving circuit and a first space defined by a second electrode, the method comprising:

A discharge voltage applying step of discharging the first space by applying a first voltage to the first electrode; and

After the first space is discharged, the first electrode is floated, and a floating step of bringing all the output terminals of the driving circuit into a high impedance state at the time of floating.

In this case, it is preferable that the interval for floating the first electrode is longer than the interval for applying the first voltage to the first electrode.

In addition, the discharge voltage applying step and the floating step may be repeated a predetermined number of times.

On the other hand, the plasma display panel according to the features of the present invention

A first electrode and a second electrode; A first space defined by the first electrode and the second electrode; And a driving circuit which sends a driving signal to the first electrode and the second electrode during the reset period.

After discharging the first space by applying a first voltage to the first electrode, the first electrode is floated, and when floating, all output terminals of the driving circuit are brought into a high impedance state.

In addition, the plasma display panel according to another aspect of the present invention

A plasma panel including a plurality of address electrodes arranged in a column direction, a plurality of sustain electrodes arranged in a zigzag pattern in a row direction, a scan electrode, and a discharge space;

It receives an image signal from the outside and outputs an address driving control signal, an X electrode driving control signal, a Y electrode driving control signal, and a floating control signal, and applies a first voltage to the scan electrode to discharge the discharge space of the plasma panel. A control unit which controls to float the scan electrode and outputs the floating control signal when floating;

An address driver for receiving an address drive control signal from the controller and applying a display data signal for selecting a discharge cell to be displayed to each address electrode;

An X electrode driving unit receiving an X electrode driving control signal from the control unit and applying a driving voltage to the X electrode;

And a Y electrode driving unit configured to receive a Y electrode driving control signal from the control unit, apply a driving voltage to the Y electrode, and set all output terminals to a high impedance state according to the floating control signal when floating.

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

According to the driving method of the plasma display panel according to the exemplary embodiment of the present invention, the applied voltage is rapidly increased and decreased to the extent that strong discharge occurs in the reset period, and the discharge is performed by reducing the magnitude of the voltage applied to the inside of the discharge space during discharge. By controlling this self-quenching, the wall charge is controlled. At this time, according to an embodiment of the present invention, the self-quenching of the discharge is implemented using the floating state of the electrode.

After the voltage is applied to the discharge space, it takes a predetermined time until the discharge is formed (the time required for the discharge is called a discharge delay). The process from applying the voltage to forming the discharge is as follows. .

When one or more of the two electrodes (two of the Y electrode, the X electrode, and the address electrode), which are expressed as capacitive loads, are connected to a power source, the two electrodes are charged with charge to discharge space (between the two electrodes). Voltage is applied. When a voltage is applied to the discharge space, discharge starts through the alpha and gamma processes, and wall charges begin to accumulate in the dielectric formed on the two electrodes. The accumulated wall charges decrease the voltage applied to the discharge space, and when a large amount of wall charges are accumulated, the voltage applied to the discharge space becomes small enough to maintain the discharge and the discharge gradually disappears.

In this process, assume the following:

(1) When the electrode of the plasma display panel is connected to the power supply during the discharge formation period as in the conventional reset method

Even when discharge starts and wall charges are accumulated in the dielectric formed on the electrode, the electric charge is continuously supplied from the power supply, so the voltage of the electrode is kept constant at the applied voltage. Therefore, since the amount of charge supplied from the power source to the electrode is almost equal to the amount of wall charge accumulated by the discharge, the decrease in the internal voltage of the discharge space due to the formation of the wall charge is very small, so that the discharge disappears only when a considerable amount of wall charge is accumulated. do.

(2) When the electrode is in a floating state after applying voltage as in the embodiment of the present invention, the power and the electrode are electrically disconnected

When the discharge is formed and wall charge accumulation starts, there is no charge flowing into the electrode from the power source, so the voltage of the electrode changes according to the amount of wall charge. Therefore, the accumulated amount of wall charges immediately decreases the internal voltage of the discharge space, and the discharge disappears even with a small amount of wall charge accumulation. In other words, if the electrode of the panel is floated by applying a predetermined voltage to the panel and then electrically opening the panel (high impedance), when the magnitude of the voltage inside the discharge space decreases due to the accumulation of wall charge, The voltage magnitude decreases as well, and the discharge disappears even with a small amount of wall charge accumulation. Accordingly, it can be seen that when the electrode is in the floating state, the wall charge can be finely controlled than the state in which the voltage is applied to the electrode through the power supply.

Hereinafter, the principle of the driving method according to an embodiment of the present invention will be described in more detail with reference to FIGS. 3A to 6.

FIG. 3A is a one-dimensional model of a PDP cell to explain a driving method according to an exemplary embodiment of the present invention, and FIG. 3B is a diagram illustrating an equivalent circuit of FIG. 3A.

In FIG. 3A, a first electrode (eg, Y electrode) 15 is electrically connected to voltage Vin via a switch S1, and a second electrode (eg, X electrode) 16 is connected to ground voltage. It is electrically connected. Dielectric layers 20 and 30 are formed inside the first electrode 15 and the second electrode 16, respectively. Discharge gas (not shown) is injected between the dielectric layers 20 and 30, and a region between the dielectric layers 20 and 30 forms a discharge space 40.

In this case, the first and second electrodes 15 and 16, the dielectric layers 20 and 30, and the discharge space 40 may be equivalently represented by the panel capacitance Cp as shown in FIG. 3B.

In FIG. 3A, it is assumed that the thicknesses of the two dielectric layers 20 and 30 are equal to d1, and the distance (distance of the discharge space) between the two dielectric layers is d2. The dielectric constants of the two dielectric layers 20, 30 are It is assumed that the voltage applied to the discharge space 40 is Vg.

Next, referring to FIG. 4, the voltage Vg applied to the discharge space in the state in which the voltage Vin is applied to the electrode without the wall charge is calculated.

From Maxwell's equation shown in Equation 1, if region A and region B are selected as Gaussian surfaces, and Gaussian theorem is applied to each of them, The electric field (E1) and the electric field (E2) in the discharge space can be obtained.

here, Represents the amount of charge applied to the electrode.

In Fig. 4, since the voltage Vin is applied to the outside, the following equations (4) and (5) can be obtained.

In addition, the following equations (6) and (7) can be obtained from equations (1) to (5).

, Where d2 is very large compared to d1, Is close to one.

From Equation 7, it can be seen that the externally applied voltage Vin is directly applied to the discharge space.

Next, referring to FIG. 5, the wall charge (when the voltage Vin is applied) Is formed, the voltage Vg 'inside the discharge space is calculated. In FIG. 5, since charge is supplied from the power supply Vin to maintain the potential of the electrode when the wall charge is formed, the amount of charge applied to the electrode is To increase.

In FIG. 5, if the region A and the region B are respectively selected as a Gaussian surface, and the Gaussian theorem is applied to each of them, the electric field E1 and the discharge space inside the dielectric as shown in Equations 8 and 9 are shown. The internal electric field E2 can be obtained.

,

ego, Therefore, equations (10) and (11) can be obtained from equations (8) and (9).

As can be seen from Equation 11, in the state where the voltage Vin is continuously applied, Since is nearly 1, it can be seen that there is only a very small voltage drop.

Next, referring to Figure 6, the wall charge ( Calculate the voltage (Vg ') in the discharge space in the floating state after the () is formed. In FIG. 6, since there is no charge flowing from the power supply Vin when the wall charge is formed, the amount of charge applied to the electrode is Becomes

In Fig. 6, after selecting the region A and the region B as a Gaussian surface, and applying the Gaussian theorem to each, the electric field E1 and the discharge space inside the dielectric as shown in Equations 2 and 12 are shown. The internal electric field E2 can be obtained.

Since the following equation (13) can be obtained from equation (12).

As can be seen from Equation 13, it can be seen that there is a large voltage drop due to wall charge in a state in which the voltage Vin is not applied (that is, in a floating state). That is, as can be seen from equations (11) and (13), the magnitude of the voltage drop due to the wall charge is 1 / (1- It can be seen that it is larger by). As a result, in the floating state, since the voltage in the discharge space is drastically reduced by the additional formation of a small wall charge, it can be seen that it can act as a sudden quenching mechanism of the discharge.

Embodiments of the present invention perform precise wall charge control using such a quenching mechanism.

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

7 is a diagram illustrating a plasma display panel according to an exemplary embodiment of the present invention.

As shown in FIG. 7, a plasma display panel according to an exemplary embodiment of the present invention includes a plasma panel 100, a controller 200, an address driver 300, an X electrode driver 400, and a Y electrode driver 500. Include.

The plasma panel 100 includes a plurality of address electrodes A1 to Am arranged in a column direction, a plurality of sustain electrodes X1 to Xn arranged in a row direction, and a scan electrode Y1 to Yn. .

The control unit 200 receives an image signal from the outside and outputs an address driving control signal, an X electrode driving control signal, and a Y electrode driving control signal.

The address driver 300 receives an address driving control signal from the controller 200 and applies a display data signal for selecting a discharge cell to be displayed to each address electrode.

The X electrode driver 400 receives the X electrode driving control signal from the controller 200 to apply a driving voltage to the X electrode, and the Y electrode driver 500 receives the Y electrode driving control signal from the controller 200 to Y. A driving voltage is applied to the electrode. In this case, as described with reference to FIG. 3B, the Y electrode driver 500 starts the discharge by applying a predetermined voltage to the X electrode or the Y electrode in the reset period, and then places the electrode in a floating state. In particular, the Y electrode driver 500 reduces the interference between the output terminals by setting the output state of the Y electrode driver 500 to a high impedance state by the control signal of the controller 200 when the Y electrode is floating.

In addition, the X electrode driver 400 and the Y electrode driver 500 apply a sustain discharge voltage to the X electrode and the Y electrode in the sustain period, respectively.

Operation of the plasma display panel according to the embodiment of the present invention having such a configuration is as follows. Here, the Y electrode driver 500 is described as implementing a plurality of STV-7617 IC, the STV-617 IC has an output state configuration diagram as shown in FIG.

Referring to FIG. 8, the Y electrode driver 500 applies a voltage signal to the Y electrode according to the STB, BLK, and HIZ signals input from the controller 200.

At this time, the STB signal is a signal for outputting data, the BLK signal is a signal for controlling the power output, and the HIZ signal is a signal for controlling the high impedance state of the power output. The names of these signals can vary as needed.

When the BLK and HIZ signals are low, the state of the output terminal of the Y electrode driver 500 becomes a high impedance state.

When STB is low, BLK is low, and HIZ is high, the state of the output terminal of the Y electrode driver 500 becomes the inverted state of the input terminal.

When STB is high, BLK is low, and HIZ is high, the output terminal of the Y electrode driver 500 is in a state where data is latched.

When the BLK is high and the HIZ is low, the output terminal of the Y electrode driver 500 is in a low state.

When BLK is high and HIZ is high, the state of the output terminal of the Y electrode driver 500 becomes high.

First, the controller 200 receives an image signal from the outside and outputs an address driving control signal, an X electrode driving control signal, a Y electrode driving control signal, and a floating control signal. The floating control signal outputs a control signal for maintaining the output terminal of the Y electrode driver 500 in a high impedance state when the Y electrode is floating. At this time, the floating control signal is composed of the BLK and HIZ signal, as shown in the output state configuration diagram of Figure 8, which can be modified as necessary.

Then, the address driver 300 receives an address driving control signal from the controller 200 and applies a display data signal for selecting a discharge cell to be displayed to each address electrode. In addition, the X electrode driver 400 receives the X electrode driving control signal from the control unit 200 to apply a driving voltage to the X electrode, and the Y electrode driving unit 500 receives the Y electrode driving control signal from the control unit 200. To apply a driving voltage to the Y electrode. In this case, as described with reference to FIG. 3B, the Y electrode driver 500 starts the discharge by applying a predetermined voltage to the X electrode or the Y electrode in the reset period, and then places the electrode in a floating state. In particular, the Y electrode driver 500 reduces the interference between the output terminals by setting the output state of the Y electrode driver 500 to a high impedance state by the control signal of the controller 200 when the Y electrode is floating. At this time, the Y electrode driver 500 implements a plurality of STV-617 IC, and applies a voltage signal to the Y electrode according to the STB, BLK and HIZ signals input from the control unit 200, the floating of the control unit when floating According to the driving signal, that is, the BLK and HIZ signals in the low state, the output stage is made high impedance.

Such a configuration is an example implemented using the STV7617 IC. Even when the Y electrode driver 500 is implemented using other ICs or other components, the controller 200 generates a floating control signal in a different form and accordingly, the Y electrode driver 500 The output stage can be made high impedance when floating.

In addition, the X electrode driver 400 and the Y electrode driver 500 apply a sustain discharge voltage to the X electrode and the Y electrode in the sustain period, respectively.

Then, the plasma panel 100 is connected to the plurality of address electrodes A1 to Am arranged in the column direction, the plurality of sustain electrodes X1 to Xn and the scan electrodes Y1 to Yn arranged in a zigzag direction in the row direction. The data is displayed according to the applied voltage.

9A and 9B illustrate a reset waveform according to an embodiment of the present invention.

As shown in Fig. 9A, according to the reset waveform according to the embodiment of the present invention, the Y electrode is left in the floating state and the floating state of the voltage Vset capable of discharging while the X electrode is kept at the ground voltage. In this case, the Y electrode may be repeatedly driven in the voltage application state and the floating state, and in this case, it is preferable to set the voltage application period t _a to be smaller than the floating state period t _f .

As shown in Figs. 9A and 9B, when the Y electrode is repeatedly driven in a voltage application state and a floating state, the difference voltage Va between the Y electrode and the X electrode, and the wall charges formed in the dielectric layers inside the two electrodes, The wall voltage Vw and the discharge current Id are shown in FIG. In the embodiment of the present invention, since the voltage of the X electrode is the ground voltage, the voltage Va is considered to be the same as the voltage of the Y electrode in the following for convenience of description.

As shown in Fig. 10, when the Y electrode is in a floating state after applying a voltage Vset equal to or more than the discharge start voltage Vf to the Y electrode to start discharge, a predetermined wall charge is accumulated as described above. At the same time, strong discharge quenching occurs in the discharge space. As the discharge space disappears, the voltage Va of the Y electrode also decreases. Then, when the discharge is formed by applying the voltage Vset to the Y electrode again and then in the floating state, as described above, predetermined wall charges are accumulated and strong discharge disappears inside the discharge space. The repetition of the voltage application and the floating state is repeated a predetermined number of times.

At this time, as shown in Fig. 10, it can be seen that the amount of discharge (ie, the magnitude of the discharge current) flowing in the discharge space gradually decreases. This is because the discharge current Id flowing in the discharge space is proportional to the difference between the voltage Va and the wall voltage Vw of the Y electrode. That is, as shown in FIG. 10, as the voltage application and the floating state are repeated, the wall voltage Vw due to wall charges accumulated in the dielectric layers formed on the two electrodes increases, and accordingly, the voltage Va of the Y electrode is increased. Since the difference between the wall voltage and the voltage Vw decreases, the discharge current decreases. At this time, the wall charges are accumulated until the voltage applied to the discharge space (that is, the difference between the Va voltage and the Vw voltage) reaches the discharge start voltage Vf.

As described above, according to the exemplary embodiment of the present invention, since the discharge can be rapidly extinguished only by accumulating a small amount of wall charges by applying a predetermined voltage Vset to the Y electrode and then driving in a floating state, the wall charges can be finely controlled. In particular, the Y electrode driver reduces the interference between the output terminals by setting the output state of the Y electrode driver to a high impedance state by the control signal of the controller when the Y electrode is floating.

At this time, it should be noted that when controlling the wall charge according to the embodiment of the present invention, the magnitude ta of the time for applying the voltage should not be long enough so that the discharge is formed too large.

Further, according to the embodiment of the present invention, since the first discharge is the largest, the wall charge can be stably controlled through the discharge after the first discharge. That is, it is preferable to drive the Y electrode by setting the turn-on time and the turn-off time so that at least two discharges occur.

As described above, the reset method according to the embodiment of the present invention has the following advantages because it controls the wall charges formed on the electrodes by floating the electrodes after applying the voltage.

First, the conventional reset method is a kind of feedback method in which a discharge is basically formed when a voltage is applied, wall charges are accumulated according to the discharge formation, and the internal voltage decreases as the wall charges are sufficiently accumulated. The reset method using the floating state according to the embodiment of the present invention is a much enhanced feedback method in which the discharge is extinguished due to the rapid decrease in the internal voltage even with little wall charge accumulation through the floating state. That is, according to the embodiment of the present invention, since the discharge is extinguished through the accumulation amount of the wall charge much smaller than before, fine control of the wall charge is possible.

Second, the conventional reset by the application of the lamp voltage gently increases the voltage applied to the discharge space through a constant voltage change amount, thereby controlling the wall charge by preventing strong discharge. In the case of the conventional lamp voltage, since the intensity of the discharge is controlled by the slope of the lamp, the lamp voltage slope constraint for the wall charge control is very strong, so that the time required for reset is long. On the contrary, in the case of the reset using the floating according to the embodiment of the present invention, since the voltage drop principle according to the wall charge is used as the intensity of the discharge, the required time can be shortened.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited only to the above-described embodiments, and various other changes and modifications are, of course, possible.

For example, in the embodiment of the present invention, the discharge of the discharge is made by putting the Y electrode in the floating state, but the other electrodes may be in the floating state. In addition, although the rising ramp waveform has been described as an example in the embodiment of the present invention, other rising or falling waveforms may be used.

As described above, according to the present invention, fine wall charge control is possible, and the time required for the reset period can be shortened. In particular, the floating may individually control the output terminal of the scan driver to perform a stable floating operation without being influenced by adjacent lines.

1 is a partial perspective view of an AC plasma display panel.

2 is an electrode array diagram of a plasma display panel.

FIG. 3A is a model of a plasma display cell for explaining a driving method according to an exemplary embodiment of the present invention, and FIG. 3B is a diagram illustrating an equivalent circuit of FIG. 3A.

4 to 6 are diagrams showing electric charges, wall charges, and voltages within the discharge spaces applied to the electrodes shown in Fig. 3A.

7 is a diagram illustrating a plasma display panel according to an exemplary embodiment of the present invention.

8 is an output state configuration diagram of the STV7617 IC constituting the Y electrode driver.

9A and 9B show a reset waveform according to the driving method of the embodiment of the present invention.

10 is a diagram showing the voltage, the wall voltage, and the discharge current of the electrode according to the driving method of the embodiment of the present invention.

Claims (20)

A method of driving a plasma display panel including a first space driven by a driving circuit and a first space defined by a second electrode, the method comprising: A discharge voltage applying step of discharging the first space by applying a first voltage to the first electrode; and And a floating step of floating the first electrode after the first space is discharged and bringing all output terminals of the driving circuit into a high impedance state at the time of floating. The method of claim 1, And the driving method is performed in a reset period. The method of claim 2, The first electrode is a scan electrode, and the second electrode is a sustain electrode. The method of claim 3, And the sustain electrode is biased at a predetermined voltage during the discharge voltage applying step and the floating step. The method of claim 1, And a section in which the first electrode is floated is longer than a section in which the first voltage is applied to the first electrode. The method of claim 1,  And the discharging voltage applying step and the floating step are repeated a predetermined number of times. The method of claim 6, And the first voltage is a constant voltage. The method of claim 6, And the first voltage is a voltage that varies with time. The method of claim 8, And the first voltage is a rising ramp voltage. The method of claim 8, And the first voltage is a falling ramp voltage. The method of claim 6, The magnitude of the discharge current flowing in the first space by the nth discharge voltage applying step is greater than the magnitude of the discharge current flowing in the first space by the n + 1th discharge voltage applying step. Way. A first electrode and a second electrode; A first space defined by the first electrode and the second electrode; And A driving circuit for transmitting a driving signal to the first electrode and the second electrode during a reset period; The driving circuit After discharging the first space by applying a first voltage to the first electrode, the first electrode is floated, and when floating, all output terminals of the driving circuit are brought into a high impedance state. . The method of claim 12, Wherein the first electrode is a scan electrode and the second electrode is a sustain electrode. The method of claim 12, The driving circuit And driving the first electrode so that a section for floating the first electrode is larger than a section for applying the first voltage to the first electrode. The method of claim 12, The driving circuit And driving the first electrode such that the application and floating of the first voltage is repeated a predetermined number of times. The method of claim 15, The magnitude of the discharge current flowing in the first space by the application of the n-th first voltage is greater than the magnitude of the discharge current flowing in the first space by the application of the n-first first voltage. . A plasma panel including a plurality of address electrodes arranged in a column direction, a plurality of sustain electrodes arranged in a zigzag pattern in a row direction, a scan electrode, and a discharge space; It receives an image signal from the outside and outputs an address driving control signal, an X electrode driving control signal, a Y electrode driving control signal, and a floating control signal, and applies a first voltage to the scan electrode to discharge the discharge space of the plasma panel. A control unit which controls to float the scan electrode and outputs the floating control signal when floating; An address driver for receiving an address drive control signal from the controller and applying a display data signal for selecting a discharge cell to be displayed to each address electrode; An X electrode driving unit receiving an X electrode driving control signal from the control unit and applying a driving voltage to the X electrode; And a Y electrode driving unit configured to receive a Y electrode driving control signal from the control unit, apply a driving voltage to the Y electrode, and set all output terminals to a high impedance state according to the floating control signal when floating. The method of claim 17, The Y electrode driver applies a predetermined voltage to the Y electrode in the reset period according to the Y electrode drive signal to start discharging, puts the electrode in a floating state, and outputs the Y electrode driver by the floating control signal during floating. A plasma display panel comprising the state in a high impedance state. The method of claim 17, The Y electrode driving unit And driving the scan electrode so that the section for floating the scan electrode is larger than the section for applying the first voltage to the scan electrode. The method of claim 17, The Y electrode driving unit And driving the scan electrode such that the application and floating of the first voltage is repeated a predetermined number of times.