KR20070090558A - Plasma display panel and driving method thereof - Google Patents

Abstract

A plasma display panel and a driving method thereof are provided to protect inner components of the plasma display panel, when the plasma display panel is overheated, by reducing a thermal stress on a switching element. A plasma display device includes a plasma display panel(100), an address electrode driver(300), a sustain electrode driver(500), a scan electrode driver(400), a temperature detector(600) and a controller(200). The temperature detector detects a temperature of the plasma display panel. When the detected temperature is higher than a reference temperature, the controller generates an ERC(Energy Recovery Control)-timing-controlled driving signal, which is generated when driving signals for the sustain and scan electrodes are generated. When the plasma display panel is overheated, the controller decreases an overall sustain pulse number corresponding to a load ratio of an input image signal.

Description

Plasma display device and driving method thereof

1 is a schematic conceptual diagram of a plasma display panel according to an exemplary embodiment of the present invention.

2 is a diagram conceptually showing a sustain discharge driving circuit of a plasma display panel including an power recovery circuit (ERC).

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

4 is a detailed block diagram of the control unit according to the first embodiment of the present invention.

5 is a flowchart illustrating a method of driving a plasma display device according to a first embodiment of the present invention.

6 is a sustain pulse waveform diagram corresponding to overheating according to an embodiment of the present invention.

7 is a detailed block diagram of the control unit according to the first embodiment of the present invention.

8 is a flowchart illustrating a method of driving a plasma display device according to a second embodiment of the present invention.

9 is a view showing a relationship with the total number of sustain pulses changed according to temperature according to an embodiment of the present invention.

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

A plasma display device is a display device that displays characters or an image by using plasma generated by gas discharge, and includes a plasma display panel in which tens to millions or more pixels (discharge cells) are arranged in a matrix form according to their size. .

The configuration of the plasma display panel is briefly shown in FIG. 1. 1 is a schematic conceptual diagram of a plasma display panel according to an exemplary embodiment of the present invention.

As shown in FIG. 1, the electrodes of the plasma display panel have a matrix form of n × m. Specifically, the address electrodes A1 to Am extend in the column direction and the scan electrodes Y1 to Yn in the row direction. ) And sustain electrodes X1 to Xn extend. The discharge space 11 at the intersection of the address electrode 8 and the paired scan electrode 4 and the sustain electrode 5 forms a discharge cell 12.

The plasma display panel is driven by dividing one frame into a plurality of subfields, and each subfield includes a reset period, an address period, and a sustain period.

In the reset period, the address period, and the sustain period, a driving signal of each electrode for a corresponding operation is provided by the driving unit. The driving unit of each electrode has a driving circuit composed of various semiconductor elements including a switch element, and the driving circuit recovers reactive power. An energy recovery circuit is included.

 Here, the sustain discharge driving circuit for applying the sustain discharge pulse in the sustain period will be briefly described with reference to FIG. 2 is a diagram conceptually showing a sustain discharge driving circuit of a plasma display panel including an power recovery circuit (ERC).

As shown in Fig. 2, the sustain discharge circuit proposed by LFWeber (US Pat. No. 4,866,349) includes switch elements Yr, Yf, Ys, and Yg, diodes D1, D2, D3, and D4, and inductor L1. ) And a power recovery capacitor (Cc). The sustain discharge circuit configured as described above applies the sustain discharge pulse voltage in four modes of operation in accordance with the switching sequence operation of the switch elements Yr, Yf, Ys, and Yg.

In the sustain discharge circuit, the switch element Yg is conducted at an initial stage, so that the voltage VP at both ends of the panel is maintained at 0V. At this time, the power recovery capacitor Cc is precharged with a voltage Vs / 2 equal to 1/2 of the externally applied voltage Vs.

Mode 1 is carried out in the period T1, and the switch element Yr is turned on while the voltage VP across the panel is kept at 0 V, and the remaining switch elements Yf, Ys, and Yg are turned off. turn-off to form a path of the power recovery capacitor Cc, the switch element Yr, the diode D1, the inductor L1, and the panel capacitor CP, by which the LC resonant circuit is formed. The output voltage VP of the panel is increased to the voltage Vs.

Mode 2 is performed in the period T2, and when mode 1 is completed, the switch element Ys is turned on and the remaining switch elements Yr, Yf, and Yg are turned off to turn the panel capacitor CP to Vs voltage. Keep it. At this time, hard switching occurs in which the instantaneous voltage is increased by ΔV when the switch element Ys is turned on.

Mode 3 is performed in the period T3, and when mode 2 is completed, the switch element Yf is turned on and the remaining switch elements Yr, Ys, and Yg are turned off, so that the path opposite to that in mode 1 And forms a path of the panel capacitor (CP), the inductor (L1), the diode (D2), the switch element (Yf), and the power recovery capacitor (Cc), by which the LC resonant circuit is formed to form the output voltage of the panel. Reduce (VP) to voltage 0V.

Mode 4 is performed in the period T4. When mode 3 is completed, the switch element Yg is turned on and the remaining switch elements Yr, Yf, and Ys are turned off, through the switch element Yg. Keep the output voltage (VP) of the panel at 0V. At this time, hard switching occurs in which the instantaneous voltage drops by ΔV when the switch element Yg is turned on.

In this state, when the switch element Yr is turned on, the cycle is repeated in the operation of the mode 1, thereby generating a sustain pulse (electrode driving signal) as shown in FIG. 2.

In the above, the highest voltage in the period T1 is increased to near the voltage Vs by the resonance operation of the inductor L1 and the capacitor Cc, and the lower the turn-on time of the switch element Ys, the lower the voltage of the hard switching voltage. (? V) becomes large, and when the turn-on time of the switch element Ys is delayed and coincides with the maximum peak time of the resonance frequency, the hard switching voltage (? V) becomes small in proximity to the Vs voltage. In this way, the lowest voltage of the T3 period becomes higher as the turn-on time of the switch element Yg becomes faster, and accordingly, the hard switching voltage ΔV becomes larger, and the turn-on time of the switch element Yg becomes the resonance frequency. Delaying to the minimum peak time is closer to OV, resulting in a smaller hard switching voltage [Delta] V.

As such, the current applied to the capacitor Cc increases according to the turn-on time of the Ys and Yg switch elements. Hereinafter, the turn-on time of these Ys and Yg switch elements is referred to as 'ERC timing'.

On the other hand, the current plasma display device has recently increased the Xe partial pressure in order to realize high brightness and high contrast, and accordingly, the discharge voltage is increased. However, as the discharge voltage increases, the breakdown voltage of the device also increases, thereby increasing the temperature problem of the device. In addition, since the switch element of the plasma display device has a high temperature characteristic, a problem of defect and thermal runaway occurs at a high temperature.

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve a conventional problem, and provides a plasma display device and a driving method thereof for preventing a failure of a switch element due to temperature overheating when the plasma display panel has a temperature higher than a predetermined temperature. will be.

According to an aspect of the present invention for solving this problem, a plasma display device including a plasma display panel, an address electrode driver, a sustain and a scan electrode driver, comprising: a temperature sensing unit for sensing a temperature; And a controller configured to generate an ERC (Energy Recovery Control) timing controlled drive signal set when generating a drive signal applied to the sustain and scan electrodes when the temperature sensed by the temperature sensor is higher than a set reference temperature.

According to one aspect of the invention, the control unit, the temperature of the panel detected by the temperature sensing unit compared with the set reference temperature, if the reference temperature is higher than the temperature control determination unit for notifying the temperature overheating state, from the input image signal An automatic power control unit for determining a screen load rate and a corresponding total number of sustain pulses; and in the case of a temperature overheating state, a driving signal applied to the sustain and scan electrodes according to the total number of sustain pulses received from the automatic power control unit; And a holding / injecting control unit for performing ERC timing control.

According to an aspect of the present invention, the ERC timing control is such that the hard switching voltage is small when the driving signal is generated. The ERC timing control may include a first interval for changing the second voltage to a second voltage in a first voltage state and a second interval for maintaining the second voltage. In the second section, when the third section that is changed to the first voltage in the second voltage state and the fourth section that maintains the second voltage are one period pulse of the driving signal, the first section and the third section It is to increase the time of at least one of the sections, or to reduce the time of at least one of the second section and the fourth section.

According to another aspect of the present invention for solving the above problems, a plasma display device including a plasma display panel, an address electrode driver, a sustain and scan electrode driver, the temperature sensing unit for sensing the temperature, and the temperature sensing unit When the sensed temperature is higher than the set reference temperature, the ERC (Energy Recovery Control) timing controlled drive signal set when generating the drive signal applied to the sustain and scan electrodes is provided and corresponds to the load ratio of the input image signal. And a control unit for reducing the number of sustain pulses.

According to another feature of the invention, the control unit, the temperature of the panel detected by the temperature sensing unit compared with the set reference temperature, the temperature control determination unit for notifying the temperature overheating state if the reference temperature or more, the temperature section and the load factor A lookup table memory including a plurality of corresponding overheat lookup tables, and determining a first total sustain pulse number corresponding to a load ratio of an input image signal, and corresponding to a load ratio and a temperature section of the image signal in a temperature overheat state. An automatic power control unit for determining a second total sustain pulse number lower than the first total sustain pulse number using an overheat-response lookup table; and in the case of a temperature overheating state, according to the second total sustain pulses received from the automatic power control unit A sustain / scan control unit configured to perform an ERC timing control set when generating a drive signal applied to the sustain and scan electrodes; It includes.

According to another feature of the present invention, the ERC timing control is such that the hard switching voltage is small when the driving signal is generated. The ERC timing control includes: a first period for changing the second voltage from the first voltage state to a second voltage; In the second section, when the third section that is changed to the first voltage in the second voltage state and the fourth section that maintains the second voltage are one period pulse of the driving signal, the first section and the third section It is to increase the time of at least one of the sections, or to reduce the time of at least one of the second section and the fourth section.

According to another feature of the present invention, the total sustain pulse number information is recorded or APC (Auto Power Circuit) level information to be adjusted is recorded in the overheat lookup table.

According to still another aspect of the present invention, there is provided a driving method of a plasma display device including a plasma display panel, an address electrode driver, a sustain and a scan electrode driver, wherein the temperature of the plasma display panel is detected and the detected temperature is a reference value. A first step of comparing whether the temperature is above; A second step of receiving a video signal and determining a load ratio; Determining a first total sustain pulse number corresponding to the load factor; And generating an ERC (Energy Recovery Control) timing controlled drive signal set when generating a drive signal applied to the sustain and scan electrodes when the sensed temperature is greater than or equal to the reference temperature.

DETAILED DESCRIPTION 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, and like reference numerals designate like parts throughout the specification.

A plasma display device and a driving method thereof according to an embodiment of the present invention will now be described in detail with reference to the drawings.

3 is a schematic diagram of a plasma display device according to an exemplary embodiment of the present invention. As shown in FIG. 3, the 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, and a scan electrode driver (hereinafter referred to as a “Y electrode driver”). 400, a sustain electrode driver (hereinafter, referred to as an “X electrode driver”) 500, and a temperature sensor 600.

The plasma display panel 100 includes a plurality of address electrodes A1-Am arranged in a column direction, a plurality of sustain electrodes (hereinafter referred to as 'X electrodes') (X1-Xn) and scans arranged in a row direction. Electrodes (hereinafter referred to as 'Y electrodes') Y1-Yn. The X electrodes X1-Xn are formed corresponding to the respective Y electrodes Y1-Yn, and generally have one end connected in common to each other. Here, the discharge space at the intersection of the address electrodes A1-Am and the X and Y electrodes X1-Xn, Y1-Yn forms a discharge cell.

The temperature detector 600 detects temperatures of the X electrode driver 500 and the Y electrode driver 400, and may detect other portions inside and outside the PDP as necessary.

The controller 200 receives an image signal from the outside and outputs an address driving signal, an X electrode driving signal, and a Y electrode driving signal according to the load ratio (or APC level) of the image signal. In particular, when the temperature sensed by the temperature sensing unit 600 is higher than the set reference temperature, the controller 200 adjusts the ERC timing to reduce the load of the switch element or lower the total power consumption in order to prevent breakage or failure of the switch elements. . In another operation, the controller 200 may control the ERC timing and control the number of pulses of the X electrode driving signal and the Y electrode driving signal to reduce the load of the switch element or lower the total power consumption.

The controller 200 divides and drives one frame into a plurality of subfields. In this case, each subfield includes a reset period, an address period, and a sustain period.

The address electrode driver 300 receives an address electrode driving signal from the controller 200 and applies a display data signal for selecting a discharge cell to be displayed to each address electrode A1-Am. The X electrode driver 500 receives an X electrode driving signal from the controller 200 and applies a driving voltage to the X electrodes X1 to Xn. The Y electrode driver 400 receives the Y electrode driving signal from the controller 200 and applies a driving voltage to the Y electrodes Y1-Yn.

4 is a detailed block diagram of the control unit according to the first embodiment of the present invention.

As shown in FIG. 4, the control unit 200 includes a gamma correction unit 210, an automatic power control unit 220, a temperature control determination unit 230, a subfield data generation unit 240, and an X / Y control unit ( 250).

The gamma correction unit 210 receives an image signal and corrects the gamma and outputs the gamma correction to the automatic power control unit 220. The temperature control determiner 230 notifies the X / Y controller 250 of the temperature overheating state when the temperature of the panel sensed by the temperature detector 600 is equal to or higher than the set reference temperature.

The automatic power controller 220 determines the number of sustain pulses by determining a load ratio and an APC (Auto Power Control) level corresponding to the input image signal.

The X / Y controller 250 outputs an X electrode and a Y electrode driving signal corresponding to the number of sustain pulses determined by the automatic power controller 220, and receives the temperature overheat state signal from the temperature control determination unit 230. In addition, the ERC timing information set corresponding to the temperature overheat state is applied to the sustain pulse number information determined by the automatic power control unit 220 to output the X electrode and the Y electrode driving signals for preventing overheating.

The ERC timing information set in response to the temperature overheating state is a control data for switching operation of the switch elements Yg and Ys to reduce the load of the switch element or reduce power loss, and the turn-on time of the switch elements Yg and Ys. Delay as much as possible so that the voltage applied to the panel is close to the Vs voltage or OV.

The subfield data generator 260 generates the error-diffused image signal as subfield data and outputs the address electrode driving signal.

Now, a driving method of the plasma display device according to the first embodiment of the present invention will be described with reference to FIGS. 5 and 6. FIG. 5 is a flowchart illustrating a method of driving a plasma display device according to a first embodiment of the present invention, in which the controller of FIG. 4 is used.

The temperature detector 600 detects the temperatures of the X electrode driver 500 and the Y electrode driver 400 and outputs the temperature to the temperature control determiner 230 (S501). In this case, the temperature detector 600 may detect other portions inside and outside the plasma display panel as necessary.

The temperature control determiner 230 compares the temperature received from the temperature sensor 600 with the set reference temperature (S502). The temperature control determination unit 230 maintains the normal operation when the temperature sensed in this comparison (S602) is less than the set reference temperature (S503).

On the other hand, the temperature control determination unit 230 outputs the X / Y control unit 250 if the detected temperature is greater than the set reference temperature. Then, the X / Y controller 250 knows that the temperature is overheated, and applies the ERC timing data set accordingly to the number of sustain pulses provided by the automatic power controller 220, so that the X electrode and the Y electrode as shown in FIG. The driving signal is output (S605).

Here, the X electrode and the Y electrode driving signals to which the overheat response ERC timing data is applied will be described with reference to FIG. 6. 6 is a sustain pulse waveform diagram corresponding to overheating according to an exemplary embodiment of the present invention.

As shown in FIG. 6, the X / Y control unit 250 switches the switching elements Yr, Yf, Ys, and Yg in the electrode driving circuit shown in FIG. In accordance with the four modes of operation, the sustain discharge pulse voltage is applied.

After charging half of the voltage (Vs / 2) of the externally applied voltage (Vs) to the power recovery capacitor (Cc) in advance, Mode 1 switches the switch while maintaining the voltage (VP) at both ends of the panel at 0V. The element Yr is turned on and the remaining switch elements Yf, Ys, and Yg are turned off. Then, the voltage Vp applied to the panel increases due to resonance caused by the power recovery capacitor Cc and the inductor L1. As the turn-on time of the switch element Ys is delayed by the overheat-response ERC timing data, the voltage Vp rises to the highest peak voltage after reaching the peak voltage and reaches near the Vs voltage. At this time, the mode 2 is started by turning on the switch element Ys according to the overheat-response ERC timing data.

Here, when the period of the mode 1 is referred to as the T10 period, the T10 period is longer than the conventional T1 period, and the panel voltage Vp at this time is relatively higher than the conventional period.

Mode 2 turns on the switch element Ys and turns off the remaining switch elements Yr, Yf, and Yg to maintain the panel capacitor CP at the voltage Vs. Mode 3 is started by turning on the switch element Yf in accordance with the normal switching sequence.

In this case, when the period of the mode 2 is referred to as the T20 period, the T20 period is shorter than the conventional T2 period, and the hard switching voltage ΔV1 generated at the start of the mode 2 is smaller than the conventional hard switching voltage ΔV. By reducing the hard switching voltage as described above, the stress of the switch element is reduced and the power consumption is reduced. Accordingly, the switch element is prevented from being burned and the panel temperature is lowered. In addition, the turn-on time of the switch element Ys is reduced, thereby reducing the stress of the element.

Mode 3 turns on the switch element Yf and turns off the remaining switch elements Yr, Ys, and Yg to reduce the output voltage VP of the panel. As the turn-on time of the switch element Ys is delayed by the overheat-response ERC timing data, the voltage Vp is lowered to the lowest peak voltage after reaching a voltage near the zero voltage in the steady state. At this time, the mode 4 is started by turning on the switch element Yg according to the overheat-responsive ERC timing data.

Here, when the period of the mode 3 is referred to as the T30 period, the T30 period is longer than the conventional T3 period, and the panel voltage Vp at this time is relatively lower than the conventional period.

Mode 4 turns on the switch element Yg and turns off the remaining switch elements Yr, Yf, and Ys to maintain the output voltage VP of the panel at 0 V through the switch element Yg. do. In this case, when the period of the mode 4 is referred to as the T40 period, the T40 period is shorter than the conventional T4 period, and the hard switching voltage ΔV2 generated at the start of the mode 4 is smaller than the conventional hard switching voltage ΔV. By reducing the hard switching voltage as described above, the stress of the switch element is reduced and the power consumption is reduced. Accordingly, the switch element is prevented from being burned and the panel temperature is lowered. In addition, the turn-on time of the switch element Yg is reduced, thereby reducing the stress of the element.

However, since the hard switching is not completely removed, the first embodiment of the present invention may not completely prevent burnout or thermal runaway of the device when the panel temperature is very high.

Therefore, the present invention proposes a second embodiment to cope with a high temperature situation that cannot be coped with in the first embodiment. The controller is configured as shown in FIG. 7 for the second embodiment of the present invention.

7 is a detailed block diagram of the control unit according to the second embodiment of the present invention, and the same reference numerals are assigned to the same components as those of the control unit of the first embodiment. Since the same configuration has been described through the first embodiment, it will not be described.

As shown in FIG. 7, the control unit 200 includes a gamma correction unit 210, an automatic power control unit 221, a temperature control determination unit 231, a subfield data generation unit 240, and an X / Y control unit 250. ) And a lookup table memory 260.

The lookup table memory 2600 stores a plurality of overheat lookup tables for responding to overheating of the panel.

The overheat lookup table can be classified into two types according to the type of recorded information. One is an overheat response lookup table in which sustain pulse number information corresponding to a combination of a load ratio (or APC level) and a temperature section is recorded, and the other is an overheat response lookup table in which APC level adjustment information for each temperature section is recorded. Level adjustment information is information that indicates how many steps of APC level should be adjusted according to the degree (temperature) of the temperature from the normal APC level determined according to the load rate of the input video signal. To reduce.

The temperature control determination unit 231 notifies the panel automatic power control unit 220 and the X / Y control unit 250 when the temperature of the panel sensed by the temperature detection unit 600 is greater than or equal to the set reference temperature.

The automatic power control unit 221 determines the number of sustain pulses by determining the load ratio and the corresponding APC (Auto Power Control) level from the input image signal, and the lookup table memory 260 determines the overheat response lookup table of the corresponding temperature section. Refer to this to determine the number of sustain pulses.

The X / Y controller 250 outputs an X electrode and a Y electrode driving signal corresponding to the number of sustain pulses provided by the automatic power controller 220, and when the temperature overheat state signal is received from the temperature control determination unit 231, ERC timing data is applied to the received sustain pulse information to output the X electrode and Y electrode driving signals to prevent overheating.

Now, a driving method of the plasma display device according to the second exemplary embodiment of the present invention will be described with reference to FIGS. 8 and 9. FIG. 8 is a flowchart illustrating a method of driving a plasma display device according to a second embodiment of the present invention, and FIG. 9 is a view showing a relationship with a total number of sustain pulses changed according to a temperature according to an embodiment of the present invention. to be.

The temperature detector 600 detects the temperature of the panel and outputs it to the temperature control determiner 231 (S801).

The temperature control determiner 230 compares the temperature received from the temperature sensor 600 with the set reference temperature (S802). If the sensed temperature is less than the set reference temperature to maintain the normal operation (S803).

On the other hand, the temperature control determination unit 231 compares the set first temperature (that is, the temperature section) when the detected temperature in the comparison (S802) is greater than the set reference temperature (S804), and the detected temperature is the first temperature. If less, the automatic power control unit 221 informs it. Then, the automatic power controller 221 determines the number of sustain pulses from the lookup table memory 260 using the overheat corresponding TB1 corresponding to the first temperature (lookup table 1) and provides the same to the X / Y controller 250.

When the sensed temperature is greater than the first temperature, the temperature control determination unit 231 sequentially starts the Nth temperature starting from the second temperature, which is the set temperature just above the first temperature, in order to find the set temperature greater than the sensed temperature. When the corresponding temperature is found during the comparison process, the automatic power control unit 221 and the X / Y control unit 250 notify the found temperature section (S806 or S808, or S810).

Then, the power control determination unit 221 performs the same operation as in step S805 to determine the number of sustain pulses corresponding to the temperature section and provides it to the X / Y control unit 250 (S807 or S809 or S811).

When the X / Y control unit 250 receives the sustain pulse number information from the power control determination unit 221 and receives the temperature overheat signal from the temperature control determination unit 231, the X / Y control unit 250 applies the ERC timing data set to the received sustain pulse. As shown in FIG. 6, the sustain pulse for overheating is output (S813).

Meanwhile, when the sensed temperature is higher than the N-th temperature, the temperature control determiner 231 outputs a control signal to a power supply device (not shown) to turn off the power (S812).

The embodiments of the present invention described above are not implemented only through the apparatus and the method, but may be implemented through a program for realizing a function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded. Implementation may be easily implemented by those skilled in the art from the description of the above-described embodiments.

Although the 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.

As described above, in the embodiment of the present invention, the circuit and the elements in the plasma display panel can be protected while reducing the temperature of the plasma display panel by reducing the driving temperature stress and lowering the power consumption during the overheating.

Claims (14)

A plasma display device comprising a plasma display panel, an address electrode driver, a sustain and scan electrode driver, A temperature sensing unit for sensing a temperature; And And a controller configured to generate an ERC (Energy Recovery Control) timing controlled drive signal set when generating a drive signal applied to the sustain and scan electrodes when the temperature sensed by the temperature sensor is higher than a set reference temperature. A plasma display device comprising a plasma display panel, an address electrode driver, a sustain and scan electrode driver, A temperature sensing unit for sensing a temperature; And When the temperature sensed by the temperature sensing unit is higher than the set reference temperature, an ERC (Energy Recovery Control) timing controlled drive signal is set when generating a drive signal applied to the sustain and scan electrodes, and the load ratio of the input image signal is applied. And a control unit for reducing the corresponding total sustain pulse number. The method according to claim 1 or 2, The ERC timing control is such that the hard switching voltage is small when the driving signal is generated. The method of claim 3, The ERC timing control is, A first section for varying from a first voltage state to a second voltage, a second section for maintaining the second voltage, a third section for varying to the first voltage in the second voltage state and a second section to maintain the second voltage And a time period of at least one of the first section and the third section is increased when the fourth section is a period pulse of the driving signal. The method according to claim 1 or 2, The ERC timing control includes: a first section for varying from a first voltage state to a second voltage; a second section for maintaining the second voltage; a third section for varying from the second voltage state to the first voltage; And a time period of at least one of the second section and the fourth section when the fourth section for holding the second voltage is one period pulse of the driving signal. The method of claim 1, The control unit, A temperature control determination unit for comparing the temperature of the panel sensed by the temperature detection unit with a set reference temperature, and informing the temperature overheating state if the temperature is higher than the reference temperature; An automatic power control unit for determining a screen load ratio and a corresponding total number of sustain pulses from an input video signal; In the case of the temperature overheat state, the X / Y control unit including a holding / scanning control unit for performing the ERC timing control set when generating a drive signal applied to the holding and scanning electrode according to the total number of sustain pulses received from the automatic power control unit Plasma display device comprising. The method of claim 2, The control unit, A temperature control determination unit for comparing the temperature of the panel sensed by the temperature detection unit with a set reference temperature, and informing the temperature overheating state if the temperature is higher than the reference temperature; A lookup table memory including a plurality of overheat-responsive lookup tables corresponding to temperature sections and load rates; The first total sustain pulse number corresponding to the load ratio of the input image signal is determined, and when the temperature is overheated, the first total sustain pulse number is reduced by using the overheat response lookup table corresponding to the load ratio of the video signal and the temperature section. An automatic power control unit to determine the number of second sustain pulses; A plasma display device including a maintenance / scanning control unit configured to perform an ERC timing control set when generating a driving signal applied to the sustaining and scanning electrodes according to the second total sustain pulses received from the automatic power control unit in a temperature overheating state; . The method of claim 2, And a total sustain pulse number information is recorded in the overheat lookup table. The method of claim 2, And an auto power circuit (APC) level information to be adjusted in the overheat lookup table. A driving method of a plasma display device comprising a plasma display panel, an address electrode driver, a sustain and a scan electrode driver, Detecting a temperature of the plasma display panel and comparing whether the detected temperature is equal to or greater than a reference temperature; A second step of receiving a video signal and determining a load ratio; Determining a first total sustain pulse number corresponding to the load factor; And And a fourth step of generating an ERC (Energy Recovery Control) timing controlled drive signal set when generating a drive signal applied to the sustain and scan electrodes when the sensed temperature is equal to or greater than the reference temperature. . The method of claim 10, The ERC timing control is such that the hard switching voltage is low when generating the drive signal. The method of claim 11, The ERC timing control is, A first section for varying from a first voltage state to a second voltage, a second section for maintaining the second voltage, a third section for varying to the first voltage in the second voltage state and a second section to maintain the second voltage And a time period of at least one of the first section and the third section is extended when the fourth section is a period pulse of the driving signal. The method of claim 10, The ERC timing control includes: a first section for varying from a first voltage state to a second voltage; a second section for maintaining the second voltage; a third section for varying from the second voltage state to the first voltage; 2. A method of driving a plasma display device according to claim 1, wherein a time period of at least one of the second section and the fourth section is reduced when the fourth section for maintaining two voltages is a period pulse of the driving signal. The method of claim 10, The fourth step, If the sensed temperature is equal to or greater than the reference temperature, determining a second total sustain pulse number less than the first total sustain pulse number using setting information, wherein the ERC is equal to the total number of second sustain pulses. A driving method of a plasma display device which generates a driving signal by timing control.

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