KR100627275B1 - Driving method of plasma display panel and plasma display device - Google Patents

Abstract

According to the driving method of the plasma display device according to the present invention, in the sustain period, sustain discharge for displaying an actual image by applying a sustain discharge pulse having a high level voltage and a low level voltage alternately to the scan electrode and the sustain electrode in an opposite phase. Do this. In this case, when the temperature of the plasma display panel is higher than the first reference temperature, the first high level voltage is applied to the scan electrodes when the first high level voltage is applied to the scan electrodes. Set it shorter than the period. This makes it possible to cause stable sustain discharge in the sustain period.

PDP, electrode, panel, temperature, discharge, sustain discharge pulse, pulse width

Description

Driving method of plasma display panel and plasma display device {DRIVING METHOD OF PLASMA DISPLAY PANEL AND PLASMA DISPLAY DEVICE}

1 illustrates a driving waveform of a conventional plasma display device.

2 is a view showing the state of wall charge after the first sustain discharge in the sustain period.

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

4 is a diagram illustrating an operation of the controller illustrated in FIG. 3.

5 is a driving waveform diagram of a plasma display device at low temperature according to an exemplary embodiment of the present invention.

6 illustrates a driving waveform of a plasma display device at high temperature according to an exemplary embodiment of the present invention.

FIG. 7 is a diagram illustrating a wall charge state after the first sustain discharge in the sustain period of the driving waveform shown in FIG. 6.

8 is a sustain discharge driving circuit diagram for generating a sustain discharge pulse according to an exemplary embodiment of the present invention.

9A and 9B are diagrams illustrating a current path of the driving circuit shown in FIG. 8.

The present invention relates to a method of driving a plasma display panel and a plasma display device.

Plasma display devices 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 form according to their size.

In the panel of the plasma display device, scan electrodes and sustain electrodes parallel to each other are formed on one surface thereof, and address electrodes are formed on the other surface in a direction orthogonal to these electrodes. The sustain electrode is formed corresponding to each scan electrode, and one end thereof is connected in common to each other.

1 is a view showing a driving waveform of a conventional plasma display device, Figure 2 is a view showing the state of the wall charge after the first sustain discharge in the sustain period.

In general, a plasma display device is driven by dividing one frame into a plurality of subfields having respective weights. As shown in FIG. 1, each subfield includes a reset period, an address period, and a sustain period.

The reset period serves to erase the wall charges formed by the previous sustain discharge and to set up the wall charges in order to stably perform the next address discharge. The address period is a period in which a wall charge is accumulated in a cell (addressed cell) that is turned on by selecting a cell that is turned on and a cell that is not turned on in the panel. The sustain period is a period in which sustain discharge is performed to actually display an image in the addressed cell.

In the address period, a scan pulse and an address pulse are applied to the scan electrode Y and the address electrode A, respectively, to generate a discharge between the scan electrode Y and the address electrode A, and then the scan electrode Y And a sustain electrode A are caused to discharge. Due to this discharge, a large amount of positive and negative wall charges are formed on the scan electrode Y and the address electrode A, and a relatively small amount of negative wall on the sustain electrode X. An electric charge is formed. Subsequently, when the sustain discharge pulse is applied to the scan electrode Y in the sustain period, since the wall charge is less formed in the sustain electrode X, the discharge delay between the scan electrode Y and the sustain electrode X becomes longer. 1, in general, the width T1 of the sustain discharge pulse applied to the scan electrode Y in the sustain period is made longer than the width T2 of the remaining sustain discharge pulses.

However, in the plasma display device, the discharge voltage and the discharge characteristic vary depending on the temperature of the plasma display panel. At this time, the plasma display device tends to have a lower discharge start voltage when the temperature increases and a higher discharge start voltage when the temperature decreases. Therefore, at low temperatures lower than room temperature, the discharge delay is increased, and thus, even when the width T2 of the sustain discharge pulse is increased, sustain discharge may not occur.

On the other hand, although the discharge delay becomes small at a high temperature higher than the normal temperature, the plasma display device has a characteristic that the opposite discharge of the scan electrode Y and the address electrode A occurs well at a high temperature, and thus the scan electrode Y in the address period. Discharge between the address electrode A and the address electrode A is large, and the discharge between the scan electrode Y and the sustain electrode X is relatively weakened. In this state, when the width T2 of the sustain discharge pulse applied to the scan electrode Y is increased as shown in FIG. 1, not only the scan electrode Y and the sustain electrode X but also the scan electrode Y and the scan electrode Y in the sustain period. Discharge may also occur between the address electrodes A. FIG. Since the Vs voltage holding time applied to the scan electrode Y after discharge is long, as shown in FIG. 2, a large number of (+) wall charges are attracted toward the address electrode A, so that many wall charges are formed on the address electrode A. FIG. In this case, the amount of the (+) wall charges formed on the sustain electrode X is reduced, so that the wall voltage between the scan electrode Y and the sustain electrode X is lowered. Therefore, when the Vs voltage is applied to the sustain electrode X later, the discharge may be weakly generated or the discharge may not be easily generated. Thus, the sustain discharge may not be sustained and low discharge may occur in the sustain period.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a plasma display panel driving method and a plasma display device capable of generating stable sustain discharge in a sustain period by adjusting a width of a first sustain discharge pulse in a sustain period according to a panel temperature. .

According to an aspect of the present invention, a plurality of third electrodes are formed in a direction crossing the plurality of first electrodes and the plurality of second electrodes and the plurality of first electrodes and the plurality of second electrodes. A method of driving a plasma display panel including an electrode is provided. The driving method divides and drives one frame into a plurality of subfields each including a reset period, an address period, and a sustain period. In the sustain period, a first voltage is applied to the plurality of first electrodes for a first period. And applying a sustain discharge pulse alternately having the first voltage and a second voltage lower than the first voltage to the plurality of second electrodes and the plurality of first electrodes in an opposite phase. In this case, the first period at which the temperature of the plasma display panel is at a first temperature is shorter than the first period at a second temperature at which the temperature of the plasma display panel is lower than the first temperature.

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According to another aspect of the present invention, a method of driving a plasma display panel including a plurality of first electrodes and a plurality of second electrodes is provided. The driving method includes applying a sustain discharge pulse having a high level voltage and a low level voltage to the plurality of first electrodes and the plurality of second electrodes in an opposite phase in a sustaining period, the temperature of the plasma display panel. Detecting a voltage and applying the first high level voltage among the plurality of high level voltages applied to the plurality of first electrodes when the temperature of the plasma display panel is higher than a first reference temperature. And setting a period shorter than a period in which the remaining high level voltages of the plurality of high level voltages are applied to the plurality of first electrodes.

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According to another feature of the invention, a plurality of first electrodes and a plurality of second electrodes and a plurality of third electrodes formed in a direction crossing the plurality of first electrodes and the plurality of second electrodes A plasma display panel, a temperature sensing unit for sensing a temperature of the plasma display panel, and during a sustaining period, after applying a first voltage to the plurality of first electrodes for a first period, the plurality of second electrodes for a second period And a driving circuit for applying a sustain discharge pulse alternately having the first voltage and the second voltage lower than the first voltage to the plurality of first electrodes in an opposite phase, and the temperature of the plasma display panel is at a first temperature. And a controller configured to set the first period of time longer than the first period at a second temperature at which the temperature of the plasma display panel is higher than the first temperature.

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Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

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

Now, a driving method and a plasma display device of a plasma display panel according to an exemplary embodiment of the present invention will be described in detail.

First, a schematic structure of a plasma display device according to an exemplary embodiment of the present invention will be described in detail with reference to FIG. 3.

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

As shown in FIG. 3, a plasma display device according to an exemplary embodiment of the present invention includes a plasma display panel 100, a controller 200, an address electrode driver 300, a sustain electrode driver 400, a scan electrode driver 500, and It includes a temperature sensor 600.

The plasma display panel 100 includes a plurality of address electrodes A1 to Am extending in the column direction, and a plurality of sustain electrodes X1 to Xn and scan electrodes Y1 to Yn extending in pairs in the row direction. Include. The sustain electrodes X1 to Xn are formed corresponding to the scan electrodes Y1 to Yn, and generally have one end connected to each other in common. The plasma display panel 100 includes a substrate (not shown) on which the sustain and scan electrodes X1 to Xn and Y1 to Yn are arranged, and a substrate (not shown) on which the address electrodes A1 to Am are arranged. The two substrates are disposed to face each other with the discharge space therebetween so that the scan electrodes Y1 to Yn and the address electrodes A1 to Am and the sustain electrodes X1 to Xn and the address electrodes A1 to Am are orthogonal to each other. At this time, the discharge space at the intersection of the address electrodes A1 to Am and the sustain and scan electrodes X1 to Xn and Y1 to Yn forms a discharge cell. The structure of the plasma display panel 100 is an example, and a panel having another structure to which the driving waveform described below may be applied may also be applied to the present invention.

The controller 200 receives an image signal from the outside and outputs an address electrode A driving control signal, a sustain electrode X driving control signal, and a scan electrode Y driving control signal. The controller 200 divides and drives one frame into a plurality of subfields. Each subfield includes a reset period, an address period, and a sustain period. At this time, the control unit 200 applies the first sustain discharge pulse applied to the scan electrode Y in the sustain period according to the temperature of the plasma display panel 100 received from the temperature sensing unit 600 and the ambient temperature of the plasma display panel. The scan electrode Y driving control signal is output so that the width of?

The address electrode driver 300 receives the address electrode A 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 sustain electrode driver 400 receives the sustain electrode X driving control signal from the controller 200 and applies a driving voltage to the sustain electrode X.

The scan electrode driver 500 receives the scan electrode Y driving control signal from the controller 200 and applies a driving voltage to the scan electrode Y.

The temperature detector 600 detects the temperature of the plasma display panel 100 and transmits the temperature to the controller 200.

Next, an operation of the controller in the plasma display device according to an exemplary embodiment of the present invention will be described in detail with reference to FIG. 4.

4 is a diagram illustrating an operation of the controller illustrated in FIG. 3.

As shown in FIG. 4, the controller 200 receives the temperature of the plasma display panel 100 and the ambient temperature of the plasma display panel 100 detected by the temperature sensing unit 600 and compares the temperature with the first reference temperature already set. (S410-S420). At this time, if the sensed temperature is less than the first reference temperature, the control unit 200 outputs a control signal to increase the width of the first sustain discharge pulse applied in the sustain period (S430) to generate a stable sustain discharge in the sustain period. To help. On the other hand, if the detected temperature is greater than the first reference temperature, the detected temperature is compared with the second reference temperature (S440). At this time, when the sensed temperature is smaller than the second reference temperature, the controller 200 applies the scan electrode Y of the first sustain discharge pulse having the pulse width T1 in the sustain period as shown in FIG. 1. A control signal is outputted to enable the operation (S450). On the contrary, when the detected temperature is higher than the second reference temperature, the controller 200 outputs a control signal for shortening the width of the first sustain discharge pulse applied in the sustain period (S460) and scan electrode Y in the sustain period. And discharge between the address electrodes A are controlled.

That is, assuming that the temperature range of room temperature is 15 to 25 degrees, the first reference temperature is 15 degrees and the second reference signal is 25 degrees. Therefore, when the sensing temperature is lower than 15 degrees, the first sustain discharge pulse having a pulse width longer than the pulse width T1 is output in the sustaining period, and when the sensing temperature is between 15 and 25 degrees, it is common. As shown in FIG. 1, the first sustain discharge pulse having the pulse width T1 is outputted, and when the sensing temperature is higher than 25 degrees, the first pulse having a pulse width shorter than the pulse width T1 in the sustain period. The second sustain discharge pulse.

First, in the case of low temperature, an embodiment capable of preventing low discharge that may occur in a sustaining period will be described in detail with reference to FIG. 5.

5 is a driving waveform diagram of a plasma display device at low temperature according to an exemplary embodiment of the present invention.

As shown in Fig. 5, each subfield consists of a reset period, an address period, and a sustain period, and the reset period consists of a rising period and a falling period.

In the rising period of the reset period, the scan electrode Y is increased from the Vs voltage to the Vset voltage while the sustain electrode X is held at 0V. Then, a weak reset discharge occurs from the scan electrode Y to the address electrode A and the sustain electrode X, respectively, and a negative wall charge is formed on the scan electrode Y, and the address electrode A and the A positive wall charge is formed on the sustain electrode X.

In the falling period of the reset period, the scan electrode Y is reduced from the Vs voltage to the Vnf voltage while the sustain electrode X is held at the Ve voltage. Then, while the voltage of the scan electrode Y decreases, a weak reset discharge occurs between the scan electrode Y and the sustain electrode X and between the scan electrode Y and the address electrode A, and thus the scan electrode ( The negative wall charges formed on Y) and the positive wall charges formed on the sustain electrode X and the address electrode A are erased.

Next, in the address period, a scan pulse having a VscL voltage is sequentially applied to the scan electrode Y to select a discharge cell, and the scan electrode to which the VscL voltage is not applied is biased to the VscH voltage. At this time, the VscL voltage is called a scan voltage and the VscH voltage is also called a non-scan voltage. In addition, an address pulse having a Va voltage is applied to an address electrode A passing through a discharge cell to be selected from among a plurality of discharge cells formed by the scan electrode Y to which the VscL voltage is applied. A) biases to a reference voltage (0V in FIG. 5). Then, an address discharge occurs in the discharge cell formed by the address electrode A applied with the Va voltage and the scan electrode Y with the VscL voltage, and positive wall charges are formed on the scan electrode Y. A negative wall charge is formed in the sustain electrode X. In addition, a negative wall charge is formed on the address electrode A as well.

Subsequently, in the sustain period, the sustain discharge pulse of the Vs voltage is sequentially applied to the scan electrode Y and the sustain electrode X. FIG. When the wall voltage is formed between the scan electrode Y and the sustain electrode X by the address discharge in the address period, the discharge occurs at the scan electrode Y and the sustain electrode X by the wall voltage and the Vs voltage. Thereafter, the process of applying the sustain discharge pulse of the Vs voltage to the scan electrode Y and the process of applying the sustain discharge pulse of the Vs voltage to the sustain electrode X are repeated the number of times corresponding to the weight indicated by the corresponding subfield. .

At this time, according to an embodiment of the present invention, since the discharge delay is longer at low temperatures, the width T3 of the sustain discharge pulse applied first in time in the sustain period is the width T1 of the sustain discharge pulse shown in FIG. 1. Make it longer. This makes it possible to prevent low discharge in the sustain period due to the discharge delay.

Next, with reference to FIGS. 6 and 7 will be described in detail with respect to the embodiment that can prevent the low discharge that can occur in the case of a high temperature in the holding period.

FIG. 6 is a diagram illustrating a driving waveform of a plasma display device at a high temperature according to an exemplary embodiment of the present invention, and FIG. 7 is a diagram illustrating a wall charge state after a first sustain discharge in a sustain period.

As shown in Fig. 6, in the case of high temperature, the width T4 of the sustain discharge pulse first applied in time in the sustain period is made shorter than the width T1 of the sustain discharge pulse shown in Fig. 1.

Since the opposite discharge occurs well at a high temperature, the discharge between the scan electrode Y and the address electrode A is large in the address period, and the discharge between the scan electrode Y and the sustain electrode X is relatively weak. In this state, if the width of the first sustain discharge pulse of the sustain period is shortened, wall charges do not accumulate on each electrode after discharge between the scan electrode Y and the address electrode A as shown in FIG. It exists in space charge state. Then, when the voltage Vs is applied to the sustain electrode X, the sustain discharge can be stably generated by using the applied voltage Vs and the space charge.

That is, in the embodiment of the present invention, the discharge is generated between the scan electrode Y and the address electrode A as well as the scan electrode Y and the sustain electrode X by the first sustain discharge pulse in the sustain period. In the sustain period, before a large amount of wall charges are accumulated in the electrode, that is, when a large amount of wall charges exist in the space charge state, a sustain discharge pulse is applied to the sustain electrode X to sustain the sustain discharge with the help of the space charge. Low discharge can be prevented.

Next, the sustain discharge driving circuit of the scan electrode driver for generating sustain discharge pulses in the sustain period will be described with reference to FIG. 8.

8 is a sustain discharge driving circuit diagram for generating a sustain discharge pulse according to an exemplary embodiment of the present invention. The switching element used in FIG. 8 is illustrated as an n-channel transistor, and may be made of a field effect transistor (FET) having a body diode, and may be made of another switching element having the same or similar function. In FIG. 8, the capacitive component formed by the scan electrode Y and the sustain electrode X is illustrated as a panel capacitor Cp for convenience, and the sustain electrode driver 400 is connected to the other end of the panel capacitor Cp. As shown.

As shown in FIG. 8, the sustain discharge driving circuit according to the embodiment of the present invention includes a power recovery circuit 510 and a sustain voltage supply unit 520.

The power recovery circuit 510 includes switching elements Yr and Yf, an inductor L, diodes D1 and D2 and a capacitor C1. The capacitor C1 is charged with the voltage Vs / 2. The power recovery capacitor C1 is electrically connected between the drain of the switching element Yr and the source of the switching element Yf, and diodes D1 and D2 are connected in series to the switching elements Yr and Yf, respectively. . One end of the inductor L is electrically connected between a contact between the diodes D1 and D2 and a contact between the switching elements Ys and Yg of the sustain voltage driving unit 420. Y) is connected in series. The diode D1 is for setting a rising path for increasing the voltage of the panel capacitor Cp when the switching element Yr has a body diode. The diode D2 is for setting a falling path for lowering the voltage of the panel capacitor Cp when the switching element Yf has a body diode. At this time, if the switching elements Yr and Yf do not have a body diode, the diodes D1 and D2 may be removed. The connected power recovery circuit 510 is connected to the voltage of the panel capacitor Cp (that is, the voltage of the scan electrode) Vs. It charges to voltage or discharges to ground voltage.

In the power recovery circuit 510, the order of connection between the inductor L, the diode D1, and the switching element Yr may be changed, and likewise between the inductor L, the diode D2, and the switching element Yf. The order of connections can also be changed.

The sustain voltage supply unit 520 is connected between the scan electrode Y between the power recovery circuit 410 and the panel capacitor Cp, and includes two switching elements Ya and Yg. The switching element Ya is connected between the power supply for supplying the sustain discharge pulse voltage Vs and the scan electrode Y of the panel capacitor Cp. The switching element Yg is a power supply and panel capacitor for supplying a ground voltage. It is connected between the scan electrodes Y of (Cp). These switching elements Ya and Yg have Vs on the panel capacitor Cp. Supply voltage and ground voltage respectively.

Next, the operation of the sustain discharge driving circuit will be described with reference to FIGS. 9A and 9B. 9A and 9B are diagrams illustrating a current path of the driving circuit shown in FIG. 8. First, since the switching element Yg is turned on, the voltage at both ends of the panel is maintained at 0 V, and the capacitor C1 is precharged with a voltage Vs / 2 equal to 1/2 of the externally applied voltage Vs. Assume that a sustain discharge pulse is applied in the sustain period.

In the state where the switching element Yg is turned on and 0 V is applied to the panel capacitor Cp, the switching element Yg is turned off and the switching element Yr is turned on. Then, an LC resonance is formed in the path of the capacitor C1, the switching element Yr, the diode D1, the inductor L and the panel capacitor Cp so that the voltage of the scan electrode Y increases to near the Vs voltage. (Path ①). Next, the switching element Ys is turned on and the switching element Yr is turned off to apply the Vs voltage to the scan electrode Y (path ②).

Next, the switching element Ys is turned off and the switching element Yf is turned on. Then, an LC resonance is formed in the paths of the panel capacitor Cp, the inductor L, the diode D2, the switching element Yf, and the capacitor C1 so that the voltage of the panel capacitor Cp is reduced to near 0V voltage. (Path ③). Next, the switching element Yg is turned on and the switching element Yf is turned off to apply a 0 V voltage to the scan electrode Y (path ④).

This operation is repeated to apply the sustain discharge pulse having the 0V voltage and the Vs voltage to the scan electrode X alternately. At this time, when the first sustain discharge pulse is applied in the sustain period when the temperature of the plasma display panel is low, the period during which the switching element Ys is turned on is longer than before, and the temperature of the plasma display panel is high temperature. When the first sustain discharge pulse is applied in the sustain period, the period during which the switching element Ys is turned on may be shorter than before.

That is, according to the exemplary embodiment of the present invention, the pulse width of the first sustain discharge pulse is varied in the sustain period by adjusting the time that the switching element Y is turned on according to the temperature of the plasma display panel and the ambient temperature of the plasma display panel. You can do it.

In the embodiment of the present invention, the sustain discharge pulse is applied using the power recovery circuit 510. However, the sustain discharge pulse is generated through the path ② and the path ④ in the sustain period without using the power recovery circuit 510. May be authorized.

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

According to the present invention, at low temperatures lower than room temperature, the width of the sustain discharge pulses first applied in the sustain period is increased, and at high temperatures higher than normal temperature, the width of the sustain discharge pulses first applied in the sustain period is shortened, thereby causing low discharge in the sustain periods. Can be prevented.

Claims (14)

A method of driving a plasma display panel comprising a plurality of first electrodes, a plurality of second electrodes, and a plurality of third electrodes formed in a direction crossing the plurality of first electrodes and the plurality of second electrodes. One frame is divided into a plurality of subfields each of which includes a reset period, an address period, and a sustain period, and is driven. In the retention period, Applying a first voltage to the plurality of first electrodes during a first period, and Applying a sustain discharge pulse alternately having the first voltage and a second voltage lower than the first voltage to the plurality of second electrodes and the plurality of first electrodes in an opposite phase, And the first period of time at which the temperature of the plasma display panel is at a first temperature is shorter than the first period at a second temperature at which the temperature of the plasma display panel is lower than the first temperature. delete delete The method of claim 1, And the third electrodes are biased at a constant voltage during the sustain period. In the method of driving a plasma display panel comprising a plurality of first electrodes and a plurality of second electrodes, Applying a sustain discharge pulse having a high level voltage and a low level voltage alternately to the plurality of first electrodes and the plurality of second electrodes in a sustain period in an opposite phase, Sensing a temperature of the plasma display panel, and When the temperature of the plasma display panel is higher than a first reference temperature, a period of applying a first high level voltage among the plurality of high level voltages applied to the plurality of first electrodes to the plurality of first electrodes is determined. Setting a shorter period than a period during which the remaining high level voltages among the level voltages are applied to the plurality of first electrodes Method of driving a plasma display panel comprising a. The method of claim 5, When the temperature of the plasma display panel is lower than or equal to the first reference temperature, the period for applying the first high level voltage to the plurality of first electrodes is longer than the period for applying the remaining high level voltage to the plurality of first electrodes. Steps to set up The driving method of the plasma display panel further comprising. delete delete The method of claim 6, When the temperature of the plasma display panel is higher than the first reference temperature, the period of applying the first high level voltage to the plurality of first electrodes is due to the high level voltage. A method of driving a plasma display panel corresponding to a period before the space charges formed between the second electrodes are converted into wall charges. A plasma display panel including a plurality of first electrodes, a plurality of second electrodes, and a plurality of third electrodes formed in a direction crossing the plurality of first electrodes and the plurality of second electrodes; A temperature sensing unit sensing a temperature of the plasma display panel; In the sustain period, after applying a first voltage to the plurality of first electrodes for a first period, the first voltage and the first voltage to the plurality of second electrodes and the plurality of first electrodes during a second period. A driving circuit for applying a sustain discharge pulse having an alternate lower second voltage in an opposite phase, and A controller configured to set the first period at which the temperature of the plasma display panel is at a first temperature longer than the first period at a second temperature at which the temperature of the plasma display panel is higher than the first temperature; Plasma display device comprising a. delete delete delete The method of claim 10, The control unit, The temperature of the plasma display panel is set to be longer than the period during which the first voltage is applied to the plurality of second electrodes and the plurality of first electrodes in the second period. A plasma whose temperature of the plasma display panel is set to be shorter than a period during which the first voltage is applied to the plurality of second electrodes and the plurality of first electrodes in the second period; Display device.

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