KR20060111223A - Plasma display apparatus and driving method therof - Google Patents

Abstract

A plasma display device and a driving method thereof are provided to stabilize address discharge by regulating the time difference from the end of a setdown period to the time point of applying scan pulse according to the scan order. A plasma display device includes a plasma display panel(700) having plural sustain electrode pairs including scan and sustain electrodes(Y1~Yn,Z); a driving unit(704) for driving plural sustain electrode pairs; and a driving pulse control unit(701) for making the length of a setup voltage sustain period of setup pulse supplied to the scan electrode of the sustain electrode pair during a reset period in at least one of plural sustain electrode groups, which includes at least one sustain electrode pair, according to the scan order, different from that in the other sustain electrode groups by controlling the driving unit.

Description

Plasma display device and driving method thereof {Plasma Display Apparatus and Driving Method therof}

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

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

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

4 is a view for explaining wall charges distributed in a discharge cell by driving pulses supplied in a reset period and an address period in a conventional drive waveform.

5 is a view for explaining in more detail the scan pulse applied to the scan electrode in the address period in the conventional drive waveform.

FIG. 6 is a view for explaining the distribution of wall charges in a discharge cell as the time from the end of the set down to the time when the scan pulse is supplied to the scan electrodes is different for each of the scan electrodes Y ₁ to Y n.

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

8 is a diagram illustrating a sustain electrode formed on a plasma display panel divided into four sustain electrode groups in order to explain a method of driving a plasma display panel according to the present invention.

9 is a view for explaining an example of dividing the sustain electrodes formed on the plasma display panel into a sustain electrode group including one or more different numbers of sustain electrodes.

Fig. 10 is a view for explaining a first embodiment of the method for driving a plasma display panel of the present invention.

11 is a view for explaining the length of the setup voltage holding period of the setup pulse adjusted according to the scanning order in more detail.

Fig. 12 is a view for explaining the difference in setup voltage holding periods between different setup pulses in the first embodiment of the method of driving a plasma display panel of the present invention.

FIG. 13 is a view illustrating distribution of wall charges in a discharge cell between a point in which the setdown ends for each of the scan electrodes (Y ₁ to Yn) of the sustain electrode according to the driving method of the present invention, and a time point at which a scan pulse is supplied to the scan electrode. Also for.

FIG. 14 is a diagram for explaining a method of adjusting the magnitude of the most recent voltage at the end of a setdown pulse to prevent erroneous discharge at the end of the setdown period. FIG.

Fig. 15 is a view for explaining a method of including a rest period having a predetermined length between scan pulses of each sustain electrode group to prevent erroneous discharge at the end of the setdown period.

FIG. 16 illustrates a method of adjusting a sustain reference voltage supplied to a sustain electrode corresponding to the slope of a setdown pulse supplied to a scan electrode; FIG.

FIG. 17 is a view for explaining the case where all of the sustaining electrode groups each include one sustaining electrode; FIG.

Fig. 18 is a view for explaining a second embodiment of the method for driving the plasma display panel of the present invention.

19 is a view for explaining in detail the length of the sustain period of the setup reference voltage adjusted according to the scanning order.

20 is a view for explaining a method of adjusting the magnitude of the most recent voltage at the end of the setdown pulse to prevent mis-discharge at the end of the setdown period.

21 is a view for explaining a method of including a rest period having a predetermined length between scan pulses of each sustain electrode group in order to prevent erroneous discharge at the end of the set-down period.

FIG. 22 is a diagram for describing a method of adjusting a sustain reference voltage supplied to a sustain electrode corresponding to a slope of a setdown pulse supplied to a scan electrode; FIG.

<Explanation of symbols for the main parts of the drawings>

700: plasma display panel 701: driving pulse control unit

702: data driver 703: scan driver

704: sustain driver 705: driving voltage driver

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel. More particularly, the present invention relates to a plasma display device and a method of driving the same, which stabilize address discharge by adjusting a time difference from an end of set down to a time point at which an address discharge occurs. will be.

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

1 illustrates a structure of a general plasma display panel.

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

The front panel 100 is made of a scan electrode 102 and a sustain electrode 103, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the bus electrode b are included in pairs. The scan electrode 102 and the sustain electrode 103 are covered by one or more upper dielectric layers 104 that limit the discharge current and insulate the electrode pairs, and to facilitate the discharge conditions on the upper dielectric layer 104 top surface. A protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

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

A method of implementing image gradation in a general plasma display panel having such a structure is shown in FIG. 2.

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

As shown in FIG. 2, in the conventional method of expressing a gray level of a plasma display panel, a frame is divided into several subfields having different number of emission times, and each subfield is a reset period (RPD) for initializing all cells again. ) Is divided into an address period APD for selecting a cell to be discharged and a sustain period SPD for implementing gradation according to the number of discharges. For example, when displaying an image with 256 gray levels, a frame period (16.67 ms) corresponding to 1/60 second is divided into eight subfields SF1 to SF8 as shown in FIG. 2, and eight subfields. Each of the SFs SF1 to SF8 is divided into a reset period, an address period, and a sustain period.

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

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

As shown in Fig. 3, the plasma display panel erases the reset period for initializing all the cells, the address period for selecting the cells to be discharged, the sustain period for maintaining the discharge of the selected cells, and the wall charges in the discharged cells. It is divided into an erase period for driving.

In the reset period, the rising ramp waveform Ramp-up is applied to all the scan electrodes at the same time in the setup period. This rising ramp waveform causes weak dark discharge within the full discharge cells. By this setup discharge, positive wall charges are accumulated on the address electrode and the sustain electrode, and negative wall charges are accumulated on the scan electrode.

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

In the address period, the negative scan pulses are sequentially applied to the scan electrodes, and the positive data pulses are applied to the address electrodes in synchronization with the scan pulses. As the voltage difference between the scan pulse and the data pulse and the wall voltage generated in the reset period are added, address discharge is generated in the discharge cell to which the data pulse is applied. In the cells selected by the address discharge, wall charges are formed such that a discharge can occur when the sustain voltage Vs is applied. The sustain electrode is supplied with a positive polarity voltage Vz during the set down period and the address period so as to reduce the voltage difference with the scan electrode so as to prevent mis-discharge with the scan electrode.

In the sustain period, a sustain pulse Su is applied to the scan electrode and the sustain electrodes alternately. In the cell selected by the address discharge, as the wall voltage and the sustain pulse in the cell are added, a sustain discharge, that is, a display discharge, occurs between the scan electrode and the sustain electrode every time the sustain pulse is applied.

After the sustain discharge is completed, in the erase period, a voltage of an erase ramp waveform Ramp-ers having a small pulse width and a low voltage level is supplied to the sustain electrode to erase the wall charge remaining in the cells of the full screen.

The wall charges distributed in the discharge cells by the driving pulses supplied in the reset period and the address period in the driving waveform will be described with reference to FIG. 4.

4 is a diagram for explaining wall charges distributed in discharge cells by driving pulses supplied in a reset period and an address period in a conventional driving waveform.

4, in the setup period of the reset period, a pulse of a positive rising ramp is supplied to the scan electrode Y, and the sustain electrode Z and the address electrode X are supplied to the scan electrode Y described above. A pulse of a relatively lower potential is supplied so that negative charges are positioned on the scan electrode Y as shown in (a), and positive charges are positioned on the sustain electrode Z and the address electrode X. Subsequently, in the set-down period, the pulse of the falling lamp is supplied to the scan electrode Y, and the sustain electrode Z and the address electrode X are supplied with a predetermined bias voltage, preferably a ground level GND. As shown in (b), the wall charges excessively accumulated in the discharge cells are partially erased during the setup period. Through this erasing process, the distribution of wall charges in each discharge cell is even. Subsequently, in the address period, an address discharge is generated as shown in (c) by the scan pulse supplied to the scan electrode Y and the data pulse supplied to the address electrode X.

On the other hand, in the address period, such address discharges are sequentially generated in accordance with the scanning order of the scan electrodes. For example, referring to the case of FIG. 4, the time difference from (b) to (c) is different for each scan electrode. As described above, the application time of the scan pulse for sequentially generating the address discharge is as shown in FIG. 5.

FIG. 5 illustrates a scan pulse applied to a scan electrode in an address period in a conventional driving waveform in more detail.

As shown in FIG. 5, in the conventional driving waveform, scan pulses are sequentially applied to each scan electrode according to the arrangement order of the scan electrodes Y ₁ to Yn. For example, as shown in Figure 5, the application of the scan pulse the first to the Y ₁ scan electrode is the fastest arrangement order on the plasma display panel is, and in the following order the Y ₂ scan electrode to the scan pulse of the Y ₁ and then is applied with the scanning pulse.

That is, (a) area in the Y ₁ scan a scan pulse applied to the electrodes is supplied after the amount of time t ₁ in the last in time of ending the set-down of the reset period and an address discharge is caused to occur, (b) area, the Y ₂ scan In the scan pulse applied to the electrode, a scan pulse is applied after a time t ₂ has elapsed from the end of the reset period, and in the area (c), the set pulse of the reset period is applied to the Y ₃ scan electrode. At the end of this time, a scan pulse is applied after a time elapsed by t ₃ to generate an address discharge. As described above, the scan pulses applied to all of the scan electrodes Y ₁ to Y n differ from each other in application time from the time when the set-down of the reset period ends.

On the other hand, as the time elapses from the end of the reset period to the time when the scan pulses are supplied to the scan electrodes (Y ₁ to Y n), the rate at which wall charges decrease in the discharge cells increases. 6 with reference to the following.

FIG. 6 is a view for explaining the distribution of wall charges in the discharge cells as the time from the end of the set down to the time when the scan pulse is supplied to the scan electrodes is different for each of the scan electrodes Y ₁ to Y n.

Referring to FIG. 6, first, as in the case of the Y ₁ scan electrode of FIG. 5, when the time difference from the time when the reset period is set to the Y ₁ scan electrode to the time when the scan pulse is supplied is relatively short t ₁ , for example, FIG. 6. As shown in (a), the wall charge in the discharge cell is advantageous for the sustain discharge. Here, (a) illustrates that 12 negative charges on the scan electrode Y, 8 positive charges on the sustain electrode Z, and 4 positive charges on the address electrode X are distributed as an example. do.

Next, when the time difference from when the set-down of the reset period ends to the time when the scan pulse is applied to the Y ₂ scan electrode as in the Y ₂ scan electrode of FIG. 5 is relatively longer than t ₁ , t ₂ , for example, FIG. As shown in (b) of FIG. 6, the wall charge in the discharge cell is reduced by a certain amount compared to (a).

In case of Figure 5 the Y ₃ scan electrode and as Y ₃ scan electrode reset period, a set-down the scan pulse from the time is long t ₃ than t ₂ by the time difference and the time above that end of the include, for example, in Fig. 6 As shown in (c), the wall charge in the discharge cell is reduced by a certain amount compared to (a) and (b).

Next, when the time difference from when the set-down of the reset period is completed to the time when the scan pulse is applied to the Yn scan electrode as in the Yn scan electrode of FIG. 5 is t ₄ longer than t ₃ described above, for example, FIG. In the discharge cell, wall charges are reduced by a certain amount compared to (a), (b) and (c).

As the time difference increases from the end of the setdown period to the time when the scan pulse is applied in the reset period, the amount of wall charges in the discharge cell decreases. This is because they are neutralized in combination with the space charges.

In this way, each other for each of the scan electrodes (Y ₁ ~ Yn) When, from the end of the set-down scan pulse is the time difference and the time each different from each other are supplied to the intensity of the address discharge, each of the scan electrodes (Y ₁ ~ Yn) in Will be different. For example, as shown in FIG. 6, when a scan pulse is applied to the Y ₁ scan electrode to generate a data pulse and an address discharge applied to the corresponding address electrode X, the wall charge distribution as shown in (a) is Yn. In the case of (a), it is assumed that the scan pulse is applied to the scan electrode to have a data charge applied to the corresponding address electrode X and the wall charge distribution as shown in (b) at the time of generating the address discharge. Strong address discharge occurs, and in (d), a relatively weak address discharge occurs.

Thus, the brightness difference caused by the intensity of the address discharge are different, the intensity of the sustain discharge in the sustain period after the addition is different from one another, each of the scan electrodes (Y ₁ ~ Yn) in accordance with each of the scan electrodes (Y ₁ ~ Yn) There is a possibility.

In addition, in the case of (d), when the time difference from the end of the set-down period of the reset period to the time when the scan pulse is applied increases excessively and the wall charge in the discharge cell is excessively lost, subsequent sustain is performed. There is a problem that no discharge occurs.

In order to solve this problem, the present invention stabilizes the address discharges by adjusting the time difference from the end of the set-down period to the time when the scan pulse is applied to the scan electrodes according to the scanning order, and further, each address discharge is assigned to each scan electrode. SUMMARY OF THE INVENTION An object of the present invention is to provide a plasma display device and a method of driving the same.

The plasma display apparatus of the present invention for achieving the above object is one in accordance with the scanning order by controlling a plasma display panel having a plurality of sustain electrodes including a scan electrode and a sustain electrode, a driving unit and a driving unit for driving the plurality of sustain electrodes One or more sustain electrode groups of the plurality of sustain electrode groups including the sustain electrodes may include a driving pulse controller configured to vary the length of the setup voltage sustain period of the setup pulse supplied to the scan electrodes of the sustain electrodes in the reset period from the other sustain electrode groups. It is characterized by including.

The driving pulse controller may be configured such that one or more sustain electrode groups of the plurality of sustain electrode groups include a plurality of sustain electrodes, and the scanning order of the scan electrodes of the plurality of sustain electrodes included in the sustain electrode group is continuous in time. It is characterized by.

In addition, the driving pulse control unit is characterized in that the number of the sustain electrode group is two or more, or less than the total number of the sustain electrodes.

In addition, the driving pulse controller is characterized in that each sustain electrode group includes the same number of sustain electrodes.

In addition, the driving pulse control unit is characterized in that at least one of each sustain electrode group includes a different number of sustain electrodes than the other sustain electrode groups.

The driving pulse controller may be configured to supply a positive bias voltage to the sustain electrode of the sustain electrode during a setdown period in which a setdown pulse is supplied to the scan electrode of the sustain electrode and an address period in which the scan reference voltage is supplied.

In addition, the period in which the set-down pulse is supplied to the scan electrodes of at least one of the plurality of sustain electrode groups may overlap with the address periods of the other sustain electrode groups.

The driving pulse controller may include a plurality of sustain electrode groups including a first sustain electrode group, a first sustain electrode group, and a second sustain electrode group in which a scan order is continuous and is slower in scanning order than the first sustain electrode group. The length of the setup voltage holding period of the setup pulse supplied to the scan electrode of the sustaining electrode group is shorter than the length of the setup voltage holding period of the setup pulse supplied to the scan electrode of the second sustaining electrode group.

The driving pulse controller may be configured such that the absolute value of the slope of the setdown pulse supplied to the scan electrode of the first sustaining electrode group is greater than the absolute value of the slope of the setdown pulse supplied to the scan electrode of the second sustaining electrode group. It is done.

The driving pulse control unit may further include a first sustain electrode group during a period in which the scan electrodes of the first sustain electrode group are supplied with a setdown pulse having a larger slope than an absolute value of the inclination of the setdown pulses supplied to the scan electrodes of the second sustain electrode group. The sustain reference voltage supplied to the sustain electrode of the second sustain electrode group has a higher potential than the sustain reference voltage supplied to the sustain electrode of the second sustaining electrode group.

The driving pulse controller may be configured to make the lowest voltage of the setdown pulse supplied to the scan electrodes of the first sustaining electrode group smaller than the lowest voltage of the setdown pulse supplied to the scan electrodes of the second sustaining electrode group.

Also, the driving pulse controller may include a rest period in which the scan pulse is not applied between a time point at which the scan pulse is supplied to the scan electrodes of the first sustain electrode group and a time point at which the scan pulse is supplied to the scan electrodes of the second sustain electrode group. Characterized in that.

In addition, the driving pulse controller is characterized in that the length of the rest period is set to 1 us (microsecond) or more and 50 us (microsecond) or less.

The driving pulse controller may be configured to apply a setup pulse having the same length of the setup voltage sustain period to scan electrodes of all sustain electrodes included in the same sustain electrode group.

Further, the driving pulse controller is such that the difference in the lengths of the setup voltage holding periods between two setup pulses which are continuous in time among the setup pulses applied to the plurality of sustain electrode groups and differ in length of the sustaining period of the setup voltages is the same. It is done.

Further, the driving pulse control unit allows the difference in the lengths of the setup voltage holding periods between two setup pulses which are continuous in time among the setup pulses applied to the plurality of sustaining electrode groups and differ in the length of the sustaining period of the setup voltages to be different from each other. It is done.

In addition, the driving method of the plasma display panel of the present invention for achieving the above object is a method of driving a plasma display panel having a plurality of sustain electrodes including a scan electrode and a sustain electrode, comprising one or more sustain electrodes in a scanning order In one or more sustain electrode groups of the plurality of sustain electrode groups, the length of the setup voltage sustain period of the setup pulse supplied to the scan electrodes of the sustain electrodes in the reset period is different from that of the other sustain electrode groups.

Here, at least one sustain electrode group of the plurality of sustain electrode groups may include a plurality of sustain electrodes, and the scanning order of the scan electrodes of the plurality of sustain electrodes included in the sustain electrode group may be continuous in time.

In addition, the number of sustain electrode groups is two or more, It is characterized by the below the total number of sustain electrodes.

Each sustain electrode group is characterized by including the same number of sustain electrodes.

In addition, at least one of each of the sustaining electrode groups may be characterized by including a different number of sustaining electrodes than the other sustaining electrode groups.

In addition, the sustain electrode of the sustain electrode may be supplied with a positive bias voltage during a setdown period in which a setdown pulse is supplied to the scan electrode and an address period in which the scan reference voltage is supplied.

The period in which the set-down pulse is supplied to the scan electrodes of at least one of the plurality of sustain electrode groups is overlapped with the address periods of the other sustain electrode groups.

The plurality of sustaining electrode groups may include a first sustaining electrode group, a first sustaining electrode group, and a second sustaining electrode group having a continuous scanning order and slower scanning order than the first sustaining electrode group. The length of the setup voltage holding period of the setup pulse supplied to the scan electrode is shorter than the length of the setup voltage holding period of the setup pulse supplied to the scan electrode of the second sustain electrode group.

The absolute value of the slope of the setdown pulse supplied to the scan electrode of the first sustaining electrode group may be greater than the absolute value of the slope of the setdown pulse supplied to the scan electrode of the second sustaining electrode group.

The sustain electrode of the first sustaining electrode group may be supplied to the scan electrode of the first sustaining electrode group during a period in which a setdown pulse having a slope greater than an absolute value of the inclination of the setdown pulse supplied to the scan electrode of the second sustaining electrode group is supplied. The sustain reference voltage supplied to is characterized by having a higher potential than the sustain reference voltage supplied to the sustain electrodes of the second sustain electrode group.

In addition, the lowest voltage of the setdown pulse supplied to the scan electrode of the first sustaining electrode group is smaller than the lowest voltage of the setdown pulse supplied to the scan electrode of the second sustaining electrode group.

In addition, a pause period during which the scan pulse is not applied may be included between a time point at which the scan pulse is supplied to the scan electrodes of the first sustain electrode group and a time point at which the scan pulse is supplied to the scan electrodes of the second sustain electrode group. .

In addition, the length of the rest period is characterized in that less than 1us (microseconds) 50us (microseconds).

In addition, a setup pulse having the same length of the setup voltage sustain period is applied to the scan electrodes of all the sustain electrodes included in the same sustain electrode group.

Further, the difference in the lengths of the setup voltage sustain periods between two setup pulses which are temporally continuous among the setup pulses applied to the plurality of sustain electrode groups and differ in lengths of the sustain periods of the setup voltages is the same.

The difference in the lengths of the setup voltage holding periods between two setup pulses which are continuous in time among the setup pulses applied to the plurality of sustain electrode groups and differ in length of the sustaining period of the setup voltages is different from each other.

Another plasma display apparatus for achieving the above object includes a plasma display panel in which a plurality of sustain electrodes including scan electrodes and sustain electrodes are formed, a driver for driving the plurality of sustain electrodes, and a driving unit for controlling the plurality of sustain electrodes to control one or more according to the scanning order. At least one sustain electrode group of the plurality of sustain electrode groups including the sustain electrode includes a driving pulse controller configured to vary the length of the sustain period of the setup reference voltage supplied to the scan electrode of the sustain electrode from the other sustain electrode group in the reset period. It is characterized by.

Here, the driving pulse controller is characterized in that the magnitude of the setup reference voltage is a sustain voltage (Vs).

The driving pulse controller may be configured such that one or more sustain electrode groups of the plurality of sustain electrode groups include a plurality of sustain electrodes, and the scanning order of the scan electrodes of the plurality of sustain electrodes included in the sustain electrode group is continuous in time. It is characterized by.

In addition, the driving pulse control unit is characterized in that the number of the sustain electrode group is two or more, or less than the total number of the sustain electrodes.

In addition, the driving pulse controller is characterized in that each sustain electrode group includes the same number of sustain electrodes.

In addition, the driving pulse control unit is characterized in that at least one of each sustain electrode group includes a different number of sustain electrodes than the other sustain electrode groups.

The driving pulse controller may be configured to supply a positive bias voltage to the sustain electrode of the sustain electrode during a setdown period in which a setdown pulse is supplied to the scan electrode of the sustain electrode and an address period in which the scan reference voltage is supplied.

In addition, the period in which the set-down pulse is supplied to the scan electrodes of at least one of the plurality of sustain electrode groups may overlap with the address periods of the other sustain electrode groups.

The driving pulse controller may include a plurality of sustain electrode groups including a first sustain electrode group, a first sustain electrode group, and a second sustain electrode group in which a scan order is continuous and is slower in scanning order than the first sustain electrode group. The length of the sustain period of the setup reference voltage supplied to the scan electrodes of the sustain electrode group is shorter than the length of the sustain period of the setup reference voltage supplied to the scan electrodes of the second sustain electrode group.

The driving pulse controller may be configured such that the absolute value of the slope of the setdown pulse supplied to the scan electrode of the first sustaining electrode group is greater than the absolute value of the slope of the setdown pulse supplied to the scan electrode of the second sustaining electrode group. It is done.

The driving pulse control unit may further include a first sustain electrode group during a period in which the scan electrodes of the first sustain electrode group are supplied with a setdown pulse having a larger slope than an absolute value of the inclination of the setdown pulses supplied to the scan electrodes of the second sustain electrode group. The sustain reference voltage supplied to the sustain electrode of the second sustain electrode group is characterized by having a higher potential than the sustain reference voltage supplied to the sustain electrode of the second sustain electrode group.

The driving pulse controller may be configured to make the lowest voltage of the setdown pulse supplied to the scan electrodes of the first sustaining electrode group smaller than the lowest voltage of the setdown pulse supplied to the scan electrodes of the second sustaining electrode group.

Also, the driving pulse controller may include a rest period in which the scan pulse is not applied between a time point at which the scan pulse is supplied to the scan electrodes of the first sustain electrode group and a time point at which the scan pulse is supplied to the scan electrodes of the second sustain electrode group. Characterized in that.

In addition, the driving pulse controller is characterized in that the length of the rest period is set to 1 us (microsecond) or more and 50 us (microsecond) or less.

The driving pulse controller may be configured to apply a reset pulse having the same length of the sustain period of the setup reference voltage to scan electrodes of all sustain electrodes included in the same sustain electrode group.

Further, the driving pulse control unit is configured such that the difference in the lengths of the sustain periods of the setup reference voltages between two reset pulses which are continuous in time among the reset pulses applied to the plurality of sustain electrode groups and differ in the lengths of the sustain periods of the setup reference voltages is the same. Characterized in that.

Further, the driving pulse control unit is configured such that the difference in the lengths of the sustain periods of the setup reference voltages between two reset pulses which are temporally continuous among the reset pulses applied to the plurality of sustain electrode groups and differ in the lengths of the sustain periods of the setup reference voltages are different from each other. Characterized in that.

A method of driving a plasma display panel of the present invention for achieving the above object is a method of driving a plasma display panel having a plurality of sustain electrodes including a scan electrode and a sustain electrode, comprising a plurality of sustain electrodes according to the scanning order In the sustain electrode group of one or more sustain electrode groups, the length of the sustain period of the setup reference voltage supplied to the scan electrode of the sustain electrode in the reset period is different from the other sustain electrode groups.

Here, the driving pulse controller is characterized in that the magnitude of the setup reference voltage is a sustain voltage (Vs).

In addition, one or more sustain electrode groups of the plurality of sustain electrode groups include a plurality of sustain electrodes, and the scanning order of the scan electrodes of the plurality of sustain electrodes included in the sustain electrode group is continuous in time.

In addition, the number of sustain electrode groups is two or more, It is characterized by the below the total number of sustain electrodes.

In addition, each of the sustain electrode groups is characterized by including the same number of sustain electrodes.

In addition, at least one of each of the sustaining electrode groups may be characterized by including a different number of sustaining electrodes than the other sustaining electrode groups.

The sustain electrode of the sustain electrode may be supplied with a positive bias voltage during a set down period in which a set down pulse is supplied to the scan electrode of the sustain electrode, and an address period in which the scan reference voltage is supplied.

In addition, the period in which the set-down pulse is supplied to the scan electrodes of at least one of the plurality of sustain electrode groups may overlap with the address periods of the other sustain electrode groups.

The plurality of sustaining electrode groups may include a first sustaining electrode group, a first sustaining electrode group, and a second sustaining electrode group having a continuous scanning order and slower scanning order than the first sustaining electrode group. The length of the sustain period of the setup reference voltage supplied to the scan electrodes is shorter than the length of the sustain period of the setup reference voltage supplied to the scan electrodes of the second sustain electrode group.

The absolute value of the slope of the setdown pulse supplied to the scan electrode of the first sustaining electrode group may be greater than the absolute value of the slope of the setdown pulse supplied to the scan electrode of the second sustaining electrode group.

The sustain electrode of the first sustaining electrode group may be supplied to the scan electrode of the first sustaining electrode group during a period in which a setdown pulse having a slope greater than an absolute value of the inclination of the setdown pulse supplied to the scan electrode of the second sustaining electrode group is supplied. The sustain reference voltage supplied to is characterized by having a higher potential than the sustain reference voltage supplied to the sustain electrodes of the second sustain electrode group.

In addition, the lowest voltage of the setdown pulse supplied to the scan electrode of the first sustaining electrode group is smaller than the lowest voltage of the setdown pulse supplied to the scan electrode of the second sustaining electrode group.

In addition, a pause period during which the scan pulse is not applied may be included between a time point at which the scan pulse is supplied to the scan electrodes of the first sustain electrode group and a time point at which the scan pulse is supplied to the scan electrodes of the second sustain electrode group. .

In addition, the length of the rest period is characterized in that less than 1us (microseconds) 50us (microseconds).

In addition, a reset pulse having the same length of the sustain period of the setup reference voltage is applied to the scan electrodes of all the sustain electrodes included in the same sustain electrode group.

In addition, the difference in the lengths of the sustain periods of the setup reference voltages between two reset pulses which are temporally continuous among the reset pulses applied to the plurality of sustain electrode groups and differ in the lengths of the sustain periods of the setup reference voltages is the same.

Further, the difference in the length of the sustain period of the setup reference voltage between two reset pulses which are temporally continuous among the reset pulses applied to the plurality of sustain electrode groups and differ in the length of the sustain period of the setup reference voltage is different from each other.

Hereinafter, exemplary embodiments of a driving apparatus and method of a plasma display panel of the present invention will be described in detail with reference to the accompanying drawings.

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

As shown in FIG. 7, the plasma display apparatus of the present invention includes scan electrodes Y ₁ to Yn and a sustain electrode Z, and a plurality of address electrodes X ₁ crossing the scan electrode and the sustain electrode Z. FIG. At least one subfield including X to Xm, wherein a driving pulse is applied to the address electrodes X ₁ to Xm, the scan electrodes Y ₁ to Yn, and the sustain electrode Z in the reset period, the address period, and the sustain period. A plasma display panel 700 representing an image made of a frame by the combination of the above, a data driver 702 for supplying data to the address electrodes X ₁ to Xm formed on the plasma display panel 700, and a scan. the electrodes (Y ₁ to Yn) and the sustain driver 704 for driving the scan driver 703 and the common electrode of the sustain electrode (Z) for driving a plasma display panel (700) A drive pulse controller 701 for controlling the simultaneous scan driver 703 and the sustain driver 704, and a drive voltage generator 705 for supplying driving voltages necessary for the respective drivers 702, 703, and 704; It includes.

Here, the aforementioned plasma display panel 700 is bonded to the front panel (not shown) and the rear panel (not shown) at regular intervals, and a plurality of electrodes, for example, scan electrodes (Y ₁ to Yn) and sustain. A plurality of sustain electrodes including the electrodes Z are formed, and address electrodes X ₁ to Xm are formed to cross the sustain electrodes including the scan electrodes Y ₁ to Yn and the sustain electrode Z.

The data driver 702 is subjected to inverse gamma correction and error diffusion by an inverse gamma correction circuit, an error diffusion circuit, and the like not shown, and then data mapped to each subfield is supplied by the subfield mapping circuit. The data driver 702 samples and latches data in response to a data timing control signal CTRX from a timing controller (not shown), and then supplies the data to the address electrodes X ₁ to Xm. do.

The scan driver 703 supplies the rising ramp waveform Ramp-up and the falling ramp waveform Ramp-down to the scan electrodes Y ₁ to Yn during the reset period under the control of the driving pulse controller 701. In addition, the scan driver 703 sequentially supplies the scan pulse Sp of the scan voltage (-Vy) to the scan electrodes Y1 to Yn during the address period under the control of the drive pulse controller 701, and during the sustain period. The sustain pulse SUS is supplied to the scan electrodes Y1 to Yn.

The sustain driver 704 supplies the bias voltage of the sustain voltage Vs to the sustain electrodes Z during a period in which a ramp ramp down occurs and an address period under the control of a timing controller (not shown). The sustain pulse SUS is supplied to the sustain electrodes Z by alternately operating with the scan driver 703 during the sustain period.

The driving pulse controller 701 generates timing control signals CTRY and CTRZ for controlling the operation timing and synchronization of the scan driver 703 and the sustain driver 704 in the reset period, the address period, and the sustain period, and controls the timing. The scan driver 703 and the sustain driver 704 are controlled by supplying the signals CTRY and CTRZ to the scan driver 703 and the sustain driver 704. In particular, the above-described driving pulse controller 701 controls the scan driver 703 and the sustain driver 704 described above, so that at least one sustain electrode group among the plurality of sustain electrode groups including at least one sustain electrode according to the scanning order. In the reset period, the length of the setup voltage sustain period of the setup pulse supplied to the scan electrode Y of the sustain electrode is different from that of the other sustain electrode groups.

The data control signal CTRX described above includes a sampling clock for latching data, a latch control signal, a switch control signal for controlling the on / off time of the energy recovery circuit and the driving switch element. The scan control signal CTRY includes an energy recovery circuit in the scan driver 703 and a switch control signal for controlling on / off time of the driving switch element, and the energy in the sustain driver 704 is included in the sustain control signal CTRZ. A switch control signal for controlling the on / off time of the recovery circuit and the drive switch element is included.

The driving voltage generator 705 generates a setup voltage Vsetup, a scan common voltage Vscan-com, a scan voltage -Vy, a sustain voltage Vs, a data voltage Vd, and the like. These driving voltages may vary depending on the composition of the discharge gas or the structure of the discharge cell.

Although not shown, another plasma display device of the present invention has the same structure as the plasma display device of the present invention shown in FIG. However, the driving pulse controller 701 generates a predetermined control signal for controlling the operation timing and synchronization of the scan driver 703 and the sustain driver 704 in the address period, and transmits the timing control signal to the scan driver 703 and In addition to controlling the scan driver 703 and the sustain driver 704 by supplying it to the sustain driver 704, in particular, in at least one sustain electrode group of the plurality of sustain electrode groups including at least one sustain electrode according to the scanning order. A predetermined control signal is supplied to the scan driver 703 and the sustain driver 704 so that the length of the sustain period of the setup reference voltage supplied to the scan electrode of the sustain electrode is different from that of the other sustain electrode groups in the reset period.

The function of the plasma display apparatuses of the present invention will be more apparent in the following description of the driving method.

Looking at the various embodiments of the driving method performed by the plasma display device of the present invention having such a structure as follows.

First, in the driving method of the plasma display panel of the present invention, the plurality of storage electrodes including the scan electrode and the sustain electrode on the plasma display panel are divided into a plurality of storage electrode groups including the one or more storage electrodes in the scanning order. In at least one of the sustain electrode groups, the length of the setup voltage sustain period of the setup pulse supplied to the scan electrode of the sustain electrode in the reset period is different from that of other sustain electrode groups, or one or more sustain electrodes in accordance with the scanning order. One or more sustain electrode groups of the plurality of sustain electrode groups including a different length of the sustain period of the setup reference voltage supplied to the scan electrode of the sustain electrode in the reset period are different from those of the other sustain electrode groups. Example of how to divide into sustain electrode group First, as shown in FIG. 8.

8 is a diagram illustrating a storage electrode formed on a plasma display panel divided into four storage electrode groups in order to explain a method of driving the plasma display panel according to the present invention.

As shown in FIG. 8, the sustain electrode including the scan electrode Y and the sustain electrode Z is disposed on the plasma display panel 800 by the A holding electrode group, the B holding electrode group, the C holding electrode group, and the D holding electrode. Divide into electrode groups.

For example, the sustaining electrodes, for example, the A holding electrode group include the sustaining electrode from the a ₁ sustaining electrode to the (a (n) / 4) holding electrode, that is, the A holding electrode group is (a ₁ (Ya ₁ , Za ₁ ) a (n) / 4 (Ya (n) / 4, Za (n) / 4)) 801, and the B holding electrode group is from (b (n + 1) / 4) holding electrode to b (2n) / Up to four holding electrodes, i.e., (b (n + 1) / 4 (Yb (n + 1) / 4, Zb (n + 1) / 4) to b (2n) / 4 (Yb ( 2n) / 4, Zb (2n) / 4)) 802. In this way, the C holding electrode group is (c (2n + 1) / 4 (Yc (2n + 1) / 4, Zc (2n + 1)). / 4) to c (3n) / 4 (Yc (3n) / 4, Zc (3n) / 4)) 803 and the D holding electrode group are (d (3n + 1) / 4 (Yd (3n + 1) ) / 4, Zd (3n + 1) / 4) to d (n) (Yd (n), Zd (n))) 804. Herein, the number of the above-described sustain electrode groups is set between 2 ?? N ?? (n-1) in a range of at least 2 to less than the total number of sustain electrodes, that is, the total number of sustain electrodes is n. Can be.

Here, all scan electrodes included in one sustaining electrode group have a continuous scan order. In other words, the sustain electrodes including the predetermined number of scan electrodes are bundled together and set as the sustain electrode group in the scanning order. For example, in the case of Fig. 8, the A holding electrode group includes scan electrodes from the Ya ₁ scan electrode to the Ya (n / 4) scan electrode, and sustains from the Za ₁ sustain electrode to the Za (n / 4) sustain electrode. The electrode holding group includes a scan electrode from the Yb ((n + 1) / 4) scan electrode to the Yb (2n / 4) scan electrode, and the Zb ((n + 1) / 4) sustain from electrode Zb (2n / 4) includes a sustain electrode to the sustain electrodes, wherein the scan order is the Ya scan electrode group Ya scan electrode ₁ is the fastest, followed by Ya _2, in this order scan order is Ya ₃ .. Ya ((n-1) / 4), Ya (n / 4), Yb ((n + 1) / 4) ...... Yb ((2n-1) / 4), Yb (2n / 4).

In FIG. 8, the number of sustain electrodes included in each of the sustain electrode groups 801, 802, 803, and 804 is the same, but at least one sustain electrode group among the sustain electrode groups 801, 802, 803, and 804 is identical. In the above, the number of sustain electrodes included may be set differently from other sustain electrode groups. The number of sustain electrode groups can also be adjusted. As described above, an example of changing the number of sustain electrodes included in the sustain electrode group or adjusting the number of sustain electrode groups is as follows.

9 is a view for explaining an example of dividing the sustain electrodes formed on the plasma display panel into a sustain electrode group including one or more different numbers of sustain electrodes.

As shown in FIG. 9, the sustain electrode including the scan electrode (Y) and the sustain electrode (Z) on the plasma display panel 900 includes an A holding electrode group, a B holding electrode group, a C holding electrode group, and a D holding electrode. Group and E holding electrode group.

For example, assuming that the total number of sustain electrodes is 100 as shown in FIG. 9, such sustain electrodes, for example, the A sustain electrode group include sustain electrodes from 1 sustain electrode to 10 sustain electrodes, that is, sustain A The electrode group is (1 (Y ₁ , Z ₁ ) 10 (Y ₁₀ , Z ₁₀ )) 901, the B holding electrode group includes sustain electrodes from the 11 holding electrodes to the 15 holding electrodes, that is, (11 (Y ₁₁ , Z ₁₁ ) to 15 (Y ₁₅ , Z ₁₅ )) 902, C holding electrode group is (16 (Y ₁₆ , Z ₁₆ ) (903), D holding electrode group is (17 (Y ₁₇ , Z ₁₇ ) to 60 (Y ₆₀ , Z) ₆₀ )) 904 and the E holding electrode group are divided to include (61 (Y ₆₁ , Z ₆₁ ) to 100 (Y ₁₀₀ , Z ₁₀₀ )). Thus, at least one of the scan electrode groups includes the sustain electrode. The number of s is different from that of the other storage electrode groups, in which the number of sustain electrodes included in each of all the storage electrode groups 901, 902, 903, 904, and 905 is different from each other.

In addition, the aforementioned C holding electrode group is a sustain electrode group including only one sustain electrode, that is, a ₁₆ sustain electrode including a Y ₁₆ scan electrode and a Z ₁₆ sustain electrode, unlike one of the other sustain electrode groups. This is the case of forming one storage electrode group.

As described above, except for the case where one storage electrode forms one storage electrode group, the scan electrodes of all the storage electrodes included in the storage electrode group have a continuous scanning order. In other words, when one storage electrode group includes a plurality of scan electrodes, for example, Y ₁ , Y ₂ , and Y ₃ scan electrodes, the Y ₁ scan electrode, the Y ₂ scan electrode, and the Y ₃ scan electrode in the storage electrode group The scan order is continuous.

Here, each of the storage electrode groups includes a different number of storage electrodes, but alternatively, only a predetermined number of storage electrode groups selected from the plurality of storage electrode groups may include a different number of storage electrodes from other storage electrode groups. For example, the A holding electrode group includes ten sustain electrodes, the B holding electrode group includes another ten sustain electrodes, and the following C holding electrode group, D holding electrode group, E holding electrode group, Each F holding electrode group includes 20 sustain electrodes.

As described above, a first embodiment of a method of driving a plasma display panel in which the sustain electrodes of the plasma display panel are divided into a plurality of sustain electrode groups and divided into four sustain electrode groups as shown in FIG. 8 will be described.

10 is a view for explaining a first embodiment of a method of driving a plasma display panel of the present invention.

As shown in Figure 10, the first embodiment of the driving method of the plasma display panel according to the present invention, the sustain electrodes 4, sustain electrodes group as the (a ₁ ~ dn) and FIG. 8, that is, A sustaining electrode group, B When divided into the sustain electrode group, the C sustain electrode group, and the D sustain electrode group, at least one of the sustain electrode groups of the plurality of sustain electrode groups includes the length of the setup voltage sustain period of the setup pulse supplied to the scan electrode of the sustain electrode in the reset period. Is different from other storage electrode groups. It is preferable that a setup pulse having the same length of the setup voltage sustain period is applied to the scan electrodes of all the sustain electrodes included in the same sustain electrode group at this time.

For example, assuming that sustain electrodes are arranged in the same order as in FIG. 8 on the plasma display panel, and scan pulses are sequentially applied according to the arrangement order as shown in FIG. 8, a relatively fast scan order is a _1. A holding electrode group including the sustain electrode from the sustain electrode to the a (n / 4) holding electrode, in other words, A holding electrode group including the scan electrode from the Ya ₁ scan electrode to the Ya (n / 4) scan electrode The length of the setup voltage holding period of the setup pulse supplied to is W _1, which is the smallest.

Next, the B holding electrode group including the scan electrodes from the Yb (n + 1/4) scan electrode to the Yb (2n / 4) scan electrode, which has a later scanning order than the scan electrodes included in the A holding electrode group, is included. The length of the setup voltage holding period of the supplied setup pulse is W _{2 which} is larger than W ₁ described above. In this manner, the length of the setup voltage holding period of the setup pulse supplied to the C holding electrode group is W ₃ larger than the above-described W ₂ , and the length of the setup voltage holding period of the setup pulse supplied to the D holding electrode group is W described above. W ₄ is greater than ₃ . In other words, the relationship W ₁ <W ₂ <W ₃ <W ₄ is established between the lengths of the setup voltage holding periods of the above-described setup pulse. That is, the plurality of sustain electrode groups include a second sustain electrode group in which the first sustain electrode group, the first sustain electrode group, and the scan order are continuous, and in which the scan order is slower than that of the first sustain electrode group, are scanned. The length of the setup voltage holding period of the setup pulse supplied to the electrode is preferably shorter than the length of the setup voltage holding period of the setup pulse supplied to the scan electrode of the second sustaining electrode group. When adjusting the length of the setup voltage sustain period of the setup pulse as described above, the period in which the setdown pulse is supplied to the scan electrodes of one or more sustain electrode groups among the plurality of sustain electrode groups preferably overlaps with the address periods of the other sustain electrode groups. Do. In other words, in the sustain electrode group of the plurality of sustain electrode groups, the length of the sustain period of the setup voltage of the setup pulse is relatively longer, the sustain electrode of which the reset period is relatively short in the duration of the setup voltage of the setup pulse. It is longer than the length of the reset period in the group. For example, in Fig. 10, the address period in the A holding electrode group and the set-down period in the D holding electrode group overlap.

In this case, it is preferable that a positive bias voltage is supplied to the sustain electrode of the sustain electrode during the setdown period in which the setdown pulse is supplied to the scan electrode and the address period in which the scan reference voltage is supplied.

In this manner, the sustaining electrode group including the scan electrodes having a relatively fast scan order is supplied with a setup pulse having a relatively small length of the sustain period of the setup voltage, and the sustaining electrode group including the scan electrodes having a relatively late scan order. The reason why the setup pulse is supplied with a relatively long length of the setup voltage is as follows.

The fact that the scan order is fast means that the address discharge occurs within a relatively fast time after the reset discharge occurring in the reset period. In other words, the time difference from the time when the set-down of the reset period is completed to the time when the address discharge is generated by the scan pulse supplied to the scan electrode and the data pulse supplied to the address electrode is relatively short. Immediately after the reset discharge, many priming particles generated by the reset discharge exist in the discharge cell. As a result, even when a setup pulse having a relatively short length of the setup voltage sustain period is supplied to the scan electrode of the sustain electrode having a fast scanning order, address discharge of sufficient intensity is generated.

On the other hand, the late scan order means that the address discharge occurs after a relatively long time after the reset discharge occurring in the reset period. In other words, the time difference from the time when the set-down of the reset period is completed to the time when the address discharge is generated by the scan pulse supplied to the scan electrode and the data pulse supplied to the address electrode is relatively long. Here, the number of the priming charges described above is neutralized by decreasing with the space charges in the discharge cell as time passes. Accordingly, the set-up pulse is supplied to the scan electrode of the sustain electrode where the address discharge is generated after a relatively long time has passed since the set-down time due to the relatively slow scan order. The time difference from this point of time to the point of time of address discharge is reduced. As a result, by reducing the time for the priming charges in the discharge cells generated by the reset discharge to decrease, the address discharge is prevented from becoming weak or even the address discharge does not occur due to the lack of the number of priming charges present in the discharge cells. It is.

When the length of the sustain period of the setup voltage of the setup pulse has at least three or more different values, it is possible to make the difference between the lengths of the two different sustain periods constant, as shown in FIG. 11.

FIG. 11 is a view for explaining the length of the setup voltage holding period of the setup pulse adjusted according to the scanning order in more detail.

As shown in FIG. 11, the difference in the lengths of the setup voltage sustain periods between two setup pulses which are temporally continuous among the setup pulses applied to the plurality of sustain electrode groups and differ in the length of the sustain periods of the setup voltages is set to be equal to each other. do. For example, assuming that the length of the setup voltage holding period of the setup pulse supplied to the scan electrode of the A holding electrode group including at least one sustain electrode including the scan electrode having a relatively fast scan order is shown in FIG. 11, Next, the length of the setup voltage holding period of the setup pulse supplied to the scan electrodes of the B holding electrode group whose scan order is later than that of the A holding electrode group described above is set to W + d which is larger than d described above. In this way, the length of the setup voltage holding period of the setup pulse supplied to the scan electrodes of the C holding electrode group is set to W + 2d which is 2d larger than W described above, and the setup pulse supplied to the scan electrodes of the D holding electrode group. The length of the setup voltage holding period of is set to W + 3d which is 3d larger than W described above. That is, the difference in the lengths of the sustain periods of the setup voltages of the two setup pulses which are temporally continuous and differ in the lengths of the sustain periods of the setup voltages are all equal to d.

Alternatively, the difference in the sustain periods of the setup voltages of two setup pulses which are continuous in time and differ in length of the sustain period of the setup voltage may be set differently from each other.

12 is a view for explaining a difference in setup voltage holding periods between different setup pulses in the first embodiment of the method of driving a plasma display panel of the present invention.

As shown in FIG. 12, the difference in the lengths of the setup voltage holding periods between two setup pulses which are temporally continuous among the setup pulses applied to the plurality of sustain electrode groups and differ in length of the sustaining period of the setup voltages is set to be different from each other. do. For example, assuming that the length of the setup voltage holding period of the setup pulse supplied to the scan electrode of the A holding electrode group including at least one sustain electrode including the scan electrode having a relatively fast scan order is shown in FIG. Next, the length of the setup voltage holding period of the setup pulse supplied to the scan electrodes of the B holding electrode group whose scan order is later than that of the A holding electrode group described above is set to W + 2d which is 2d larger than the above-described W. In this way, the length of the setup voltage holding period of the setup pulse supplied to the scan electrodes of the C holding electrode group is set to W + 3d which is 3d larger than W described above, and the setup pulse supplied to the scan electrodes of the D holding electrode group. The length of the setup voltage holding period of is set to W + 7d which is larger by 7d than W described above. That is, the difference in the lengths of the sustain periods of the setup voltages of the two setup pulses that are temporally continuous and differ in the length of the sustain periods of the setup voltages is different from each other by 2d, d, and 4d.

Looking at the distribution of the wall charge in the discharge cell according to the driving method as shown in FIG.

FIG. 13 is a view illustrating distribution of wall charges in a discharge cell between a point in which the setdown ends for each of the scan electrodes (Y ₁ to Yn) of the sustain electrode according to the driving method of the present invention, and a time point at which a scan pulse is supplied to the scan electrode. It is for the drawing.

Referring to FIG. 13, first, as shown in FIG. 13, when the time difference from the time when the reset period is set to the scan electrode to the time when the scan pulse is supplied to the scan electrode is relatively short, t ₁ , for example, as shown in FIG. As in a), the wall charge in the discharge cell is advantageous for the sustain discharge. For example, in (a), 12 negative charges on the scan electrode Y, 8 positive charges on the sustain electrode Z, and 4 positive charges on the address electrode X are distributed. .

In addition, when the scanning order is later than that of the A holding electrode group as shown in the B holding electrode group of FIG. When the time difference up to the point of time is set to t ₂ similar to the above-described t ₁ , the wall charges are distributed in the discharge cell to favor sustain discharge similarly to (a) as shown in FIG. 13 (b).

In addition, when the scanning order is later than that of the A holding electrode group and the B holding electrode group as in the C holding electrode group of FIG. 10, the length of the setup voltage holding period of the setup pulse is increased to be longer than that of the B holding electrode group, thereby increasing the scan electrode. In the case where the time difference from when the set-down period of the reset period ends to when the scan pulse is applied is set to t ₃ similar to t ₁ or t ₂ described above, for example, as shown in FIG. The charges are distributed to favor sustain discharges similarly to (a) or (b).

In addition, when the scanning order is slower than that of the A holding electrode group, the B holding electrode group, and the C holding electrode group as in the D holding electrode group of FIG. 10, the length of the setup voltage holding period of the setup pulse is longer than that of the C holding electrode group described above. By increasing the length, the time difference from when the set-down of the reset period ends to the time when the scan pulse is applied to the scan electrode is set to t ₄ similar to t ₁ , t ₂ , or t ₃ described above. As shown in (d), the wall charges are distributed in the discharge cell in favor of the sustain discharge similarly to (a), (b) or (c).

As a result, in all cases of FIGS. 13A, 13B, 13C, and 13D, the distribution of wall charges in the discharge cells at the time of the address discharge is equally even. As a result, the distribution of wall charges in the discharge cells after the address discharge is advantageous for the subsequent sustain discharge.

Further, the above-mentioned _{t 1, t 2, t 3} , t 4 of the 13 here is preferably set to the same. That is, the time difference (t ₁ , t ₂ , t) from the end of the set-down of the reset period in the scan electrodes of all sustain electrodes to the time when the address pulse is generated by applying a scan pulse to the scan electrode and applying a data pulse to the address electrode. _3, t ₄₎ are preferably all the same.

In the driving method of the present invention, as the length of the setdown period increases in the sustain electrode including the scan electrodes having a late scan order, due to the influence of the data pulses supplied to the address electrode lines of the other discharge cells adjacent to each other at the end of the setdown pulse. There is a possibility of false discharge. In order to prevent this, the setdown pulse is adjusted.

14 is a view for explaining a method of adjusting the magnitude of the most recent voltage at the end of the setdown pulse in order to prevent mis-discharge at the end of the setdown period.

As shown in FIG. 14, in the A holding electrode group including the sustain electrode including the scan electrodes having a relatively rapid scanning order, the lowest voltage of the setdown pulse applied to the scan electrode of the sustain electrode in the reset period is -Vy ₄ . In the B holding electrode group having a slower scanning order than the A holding electrode group described above, the lowest voltage of the set-down pulse applied to the scan electrode of the sustain electrode in the reset period is -Vy ₃ , and the scanning order is lower than that of the B holding electrode group described above. In the slow C holding electrode group, the lowest voltage of the set-down pulse applied to the scan electrode of the sustain electrode in the reset period is -Vy ₂ , and in the D holding electrode group in which the scanning order is slower than that of the C holding electrode group described above, The lowest voltage of the setdown pulse applied to the scan electrode is -Vy ₁ . Here, the relationship -Vy ₁ > -Vy ₁ > -Vy ₁ > -Vy ₁ holds. In other words, the lowest voltage of the set-down pulse supplied to the scan electrodes of the first sustain electrode group is the scan electrode of the second sustain electrode group which is in continuous scan order and slower in scanning order than the first sustain electrode group. It is desirable to be smaller than the lowest voltage of the setdown pulses supplied to.

As such, the reason for setting the lowest potential of the setdown pulse to be relatively larger in the sustain electrode group including the sustain electrode including the scan electrode having a relatively late scan order is provided by the address electrode to another adjacent discharge cell. This is to prevent erroneous discharge from occurring due to interaction with data pulses.

More specifically, for example, it is assumed that the discharge cell on the plasma display panel in which the aforementioned C holding electrode group is located is H, and the discharge cell on the plasma display panel in which the D holding electrode group is adjacent to the H discharge cell is located. Assume that I In this case, there is a possibility that the time point at which the data pulse is supplied to the H discharge cell through the address electrode and the time point at which the setdown pulse is supplied to the I discharge cell through the scan electrode are coincident with each other. As such, when the data pulse is supplied to the H discharge cell through the address electrode and the set down pulse is supplied to the I discharge cell through the scan electrode, the data pulse supplied to the H discharge cell and the I discharge cell are supplied. Due to the potential difference of the setdown pulses, an erroneous discharge occurs. The lowest voltage of the setdown pulse is adjusted to prevent this misdischarge.

It is also possible to include a rest period having a predetermined length between the scan pulse supplied to the scan electrode of one sustaining electrode group and the scan pulse supplied to the scan electrode of the sustaining electrode group in order to prevent such an error discharge. Looking at the same as Figure 15.

FIG. 15 is a view for explaining a method of including a rest period having a predetermined length between scan pulses of each sustain electrode group in order to prevent mis-discharge at the end of the set-down period.

Referring to FIG. 15, when the plurality of electrode groups include a first storage electrode group and a second storage electrode group in which the scan order is continuous with the first storage electrode group and the scanning order is later than that of the first storage electrode group. In the above-described sustain electrodes of the first sustaining electrode group, scan electrodes are supplied from the sustain electrodes including the scan electrodes having the latest scan order and the scan electrodes having the earliest scanning order among the sustain electrodes of the second sustain electrode group. A rest period of a predetermined length d is included between the time points at which the scan pulses are supplied from the sustain electrodes. In this case, the rest period is a period in which the scan pulses are not supplied, and is a difference between the application time points of the scan pulses of two sustain electrode groups in which the scan order is continuous in time.

In addition, the length of this rest period is more preferably 1 us (microsecond) or more and 50 us (microsecond) or less.

In this way, a predetermined time difference is provided between the scan pulses supplied from the two sustain electrode groups in which the scan order is continuous, thereby preventing the misdischarge as described above in FIG.

It is also possible to make the absolute value of the slope of the setdown pulse in the first sustain electrode group larger than the slope of the setdown pulse in the second sustain electrode group. The smaller the absolute value of the slope of the setdown pulse is, the smaller the scan order is, the more stable and weak setdown discharge is generated, thereby reducing the loss of wall charges compared to the case where the scan order is faster. You can make it even more even.

As such, when adjusting the slope of the setdown pulse supplied to the scan electrode of the sustain electrode, it is preferable to adjust the reference voltage supplied to the sustain electrode corresponding thereto.

FIG. 16 is a view for explaining a method of adjusting a sustain reference voltage supplied to a sustain electrode corresponding to a slope of a setdown pulse supplied to a scan electrode.

Referring to FIG. 16, when adjusting the slope of the setdown pulse supplied to the scan electrode, the sustain reference voltage supplied to the sustain electrode corresponding thereto is adjusted. For example, as shown in FIG. 16, as the absolute value of the slope of the setdown pulse supplied to the scan electrode of the sustain electrode decreases, the magnitude of the sustain reference voltage Vz supplied to the corresponding sustain electrode becomes smaller. That is, in the A holding electrode group, the sustain reference voltage V ₁ supplied to the sustain electrode is kept constant in the set down period in which the set down pulse is supplied to the scan electrode of the sustain electrode and in the address period in which the scan pulse is supplied. On the other hand, in the B holding electrode group, which has a slower scanning order than the A holding electrode group described above, the sustain reference voltage V ₂ having a lower voltage than V ₁ is supplied to the sustain electrode in the set down period in which the set down pulse is supplied to the scan electrode. In the address period, the same V ₁ sustain reference voltage as that of the A holding electrode group described above is supplied. In addition, in the C holding electrode group having a later scanning order than the B holding electrode group, the sustain electrode is supplied with the sustain reference voltage V ₃ having a lower voltage than V ₂ in the set down period in which the set down pulse is supplied to the scan electrode. In the address period, the same V ₁ sustain reference voltage as that of the A holding electrode group and the B holding electrode group described above is supplied. In other words, the scan electrodes of the first sustaining electrode group have a setdown pulse having a slope greater than the absolute value of the slope of the setdown pulses supplied to the scan electrodes of the second sustaining electrode group whose scan order is later than that of the first sustaining electrode group described above. It is preferable that the sustain reference voltage supplied to the sustain electrodes of the first sustaining electrode group has a higher potential than the sustain reference voltage supplied to the sustain electrodes of the second sustaining electrode group during the supplied period.

In the above description, the sustain electrode group includes a plurality of sustain electrodes, but it is most preferable that all of the sustain electrodes include one sustain electrode, which will be described with reference to FIG. 17.

17 is a diagram for explaining the case where all of the sustaining electrode groups each include one sustaining electrode.

Referring to FIG. 17, all of the sustain electrodes 1 to n have respective setup voltage sustain periods of different setup pulses. That is, when the concept of the electrode group is described with reference to FIG. 17, all of the plurality of storage electrode groups include one storage electrode.

As such, when the lengths of the sustain periods of the setup voltages of the setup pulses supplied to the scan electrodes of all the sustain electrodes are different from each other, between the time when the set-down of the reset period ends in the scan electrodes of all the sustain electrodes and when the address discharge occurs By being able to set all of the time differences in the same, the distribution of wall charges in the discharge cells can be made even.

In the first embodiment of the driving method of the plasma display panel according to the present invention, the length of the sustain period of the setup voltage of the setup pulse of the reset period is adjusted. Alternatively, the length of the sustain period of the setup reference voltage is adjusted within the discharge cell. You can evenly distribute the wall charges. This method is the same as the second embodiment of the method of driving the plasma display panel of the present invention.

18 is a view for explaining a second embodiment of the method of driving the plasma display panel of the present invention.

As shown in Figure 18, the second embodiment of the driving method of the plasma display panel according to the present invention, the sustain electrodes 4, sustain electrodes group as the (a ₁ ~ dn) and FIG. 8, that is, A sustaining electrode group, B When divided into the sustain electrode group, the C sustain electrode group, and the D sustain electrode group, at least one of the sustain electrode groups of the plurality of sustain electrode groups has a length of the sustain period of the setup reference voltage supplied to the scan electrode of the sustain electrode in the reset period. It is different from other sustaining electrode groups. The scan electrodes of all sustain electrodes included in the same sustain electrode group at this time are preferably supplied with a setup reference voltage having the same length of sustain period. Here, the above-mentioned setup reference voltage is a positive voltage of a predetermined magnitude which is supplied to the scan electrode to supply the rising ramp pulse in the setup period of the reset period. Also preferably, this setup reference voltage is a sustain voltage (Vs).

For example, assuming that sustain electrodes are arranged in the same order as in FIG. 8 on the plasma display panel, and scan pulses are sequentially applied according to the arrangement order as shown in FIG. 8, a relatively fast scan order is a _1. A holding electrode group including the sustain electrode from the sustain electrode to the a (n / 4) holding electrode, in other words, A holding electrode group including the scan electrode from the Ya ₁ scan electrode to the Ya (n / 4) scan electrode The length of the sustain period of the setup reference voltage supplied to W ₁ is the smallest W ₁ .

Next, the B holding electrode group including the scan electrodes from the Yb (n + 1/4) scan electrode to the Yb (2n / 4) scan electrode, which has a later scanning order than the scan electrodes included in the A holding electrode group, is included. The length of the sustain period of the supplied setup reference voltage is W _{2, which} is larger than W ₁ described above. In this way, the length of the setup reference voltage holding period supplied to the C holding electrode group is W ₃ larger than the above-described W ₂ , and the length of the setup reference voltage holding period supplied to the D holding electrode group is W larger than the above-described W _{3. 4} In other words, a relationship of W ₁ <W ₂ <W ₃ <W ₄ is established between the lengths of the sustain periods of the above-described setup reference voltage. That is, the plurality of sustain electrode groups include a second sustain electrode group in which the first sustain electrode group, the first sustain electrode group, and the scan order are continuous, and in which the scan order is slower than that of the first sustain electrode group, are scanned. The length of the sustain period of the setup reference voltage supplied to the electrode is preferably shorter than the length of the sustain period of the setup reference voltage supplied to the scan electrode of the second sustain electrode group.

When the length of the sustain period of the setup reference voltage is adjusted in this manner, the period in which the setdown pulse is supplied to the scan electrodes of one or more sustain electrode groups among the plurality of sustain electrode groups preferably overlaps with the address periods of the other sustain electrode groups. . In other words, in the sustain electrode group of the plurality of sustain electrode groups, the length of the sustain period of the setup voltage of the setup pulse is relatively longer, the sustain electrode of which the reset period is relatively short in the duration of the setup voltage of the setup pulse. It is longer than the length of the reset period in the group.

In this case, it is preferable that a positive bias voltage is supplied to the sustain electrode of the sustain electrode during the setdown period in which the setdown pulse is supplied to the scan electrode and the address period in which the scan reference voltage is supplied.

The magnitude of the above-described setup reference voltage is preferably the magnitude of the sustain voltage Vs. That is, in one or more sustain electrode groups of the plurality of sustain electrode groups, the length of the sustain period of the sustain voltage Vs supplied to the scan electrodes of the sustain electrodes in the reset period is different from that of other sustain electrode groups.

In this way, the sustain electrode group including the scan electrodes having a relatively fast scan order is supplied with a setup reference voltage having a relatively small length of the sustain period, and the sustain period is included in the sustain electrode group including the scan electrodes having a relatively late scan order. The reason for supplying a relatively long setup reference voltage for is as follows.

That is, the scan electrode of the sustain electrode where the address discharge occurs after a relatively long time has passed since the set-down time due to the relatively slow scan order is supplied to the setup reference voltage having a relatively long sustain period. Time difference from to the time point at which the address discharge occurs. As a result, by reducing the time for the priming charges in the discharge cells generated by the reset discharge to decrease, the address discharge is prevented from becoming weak or even the address discharge does not occur due to the lack of the number of priming charges present in the discharge cells. It is.

When the length of the sustain period of the setup reference voltage has at least three or more different values, it is possible to make the difference between the lengths of the two different sustain periods constant, as shown in FIG. 19.

FIG. 19 is a diagram for describing the length of the sustain period of the setup reference voltage adjusted according to the scanning order in more detail.

As shown in Fig. 19, the difference in the length of the sustain period between two setup reference voltages that are temporally continuous among the setup reference voltages applied to the plurality of sustain electrode groups and differ in the length of the sustain period is set to be equal to each other. For example, assuming that the length of the sustain period of the setup reference voltage supplied to the scan electrodes of the A holding electrode group including one or more sustain electrodes including scan electrodes having a relatively quick scan order is shown as W, Next, the length of the sustain period of the setup reference voltage supplied to the scan electrodes of the B holding electrode group whose scan order is later than that of the A holding electrode group described above is set to W + d which is larger than d described above. In this way, the length of the sustain period of the setup reference voltage supplied to the scan electrodes of the C holding electrode group is set to W + 2d, which is 2d larger than W described above, and the setup reference voltage supplied to the scan electrodes of the D holding electrode group. The length of the holding period of is set to W + 3d which is 3d larger than W described above. That is, the difference in the lengths of the sustain periods of the two setup reference voltages which are continuous in time and differ in the length of the sustain periods is all the same as d.

Alternatively, the difference between the sustain periods of two setup reference voltages which are continuous in time and differ in length of the sustain period may be set differently from each other.

In this way, by adjusting the length of the sustain period of the setup reference voltage, the time discharge from the end of the set-down to the time of the occurrence of the address discharge is uniform in the plurality of sustain electrode groups to stabilize the address discharge.

In the driving method of the present invention, as the length of the setdown period increases in the sustain electrode including the scan electrodes having a late scan order, due to the influence of the data pulses supplied to the address electrode lines of the other discharge cells adjacent to each other at the end of the setdown pulse. There is a possibility of false discharge. In order to prevent this, the setdown pulse is adjusted.

20 is a view for explaining a method of adjusting the magnitude of the most recent voltage at the end of the setdown pulse to prevent mis-discharge at the end of the setdown period.

Referring to FIG. 20, in the A holding electrode group including the sustain electrode including the scan electrodes having a relatively rapid scanning order, the lowest voltage of the setdown pulse applied to the scan electrode of the sustain electrode in the reset period is -Vy ₄ . In the B holding electrode group, which has a slower scanning order than the A holding electrode group, the lowest voltage of the set-down pulse applied to the scan electrode of the sustaining electrode during the reset period is -Vy ₃ , and the C holding electrode having a slower scanning order than the aforementioned B holding electrode group. In the group, the lowest voltage of the set-down pulse applied to the scan electrode of the sustain electrode in the reset period is -Vy ₂ , and in the D sustain electrode group in which the scan order is slower than that of the C sustain electrode group described above, the scan electrode of the sustain electrode is applied in the reset period. The lowest voltage of the set down pulse is -Vy ₁ . Here, the relationship -Vy ₁ > -Vy ₁ > -Vy ₁ > -Vy ₁ holds. As shown in FIG. 20, the method of adjusting the magnitude of the lowest voltage of the set-down pulse to prevent the occurrence of erroneous discharge is the same as that of FIG. 14 of the first embodiment of the method of driving the plasma display panel of the present invention. do.

Further, in order to prevent the above-mentioned misdischarge, it is also possible to include a rest period having a predetermined length between the scan pulses supplied to the scan electrodes of one sustain electrode group and the scan pulses supplied to the scan electrodes of the next sustain electrode group. Looking at these methods, it looks like Figure 21 below.

21 is a view for explaining a method of including a rest period having a predetermined length between scan pulses of each sustain electrode group in order to prevent erroneous discharge at the end of the set-down period.

Referring to FIG. 21, when the plurality of electrode groups include a first storage electrode group and a second storage electrode group in which the scan order is continuous with the first storage electrode group and the scanning order is later than that of the first storage electrode group. In the above-described sustain electrodes of the first sustaining electrode group, scan electrodes are supplied from the sustain electrodes including the scan electrodes having the latest scan order and the scan electrodes having the earliest scanning order among the sustain electrodes of the second sustain electrode group. A rest period of a predetermined length d is included between the time points at which the scan pulses are supplied from the sustain electrodes. The length of this rest period is more preferably 1 us (microsecond) or more and 50 us (microsecond) or less. As shown in FIG. 21, the method of using the rest period having a predetermined length in order to prevent the occurrence of erroneous discharge is the same as that of FIG. 15 of the first embodiment of the method of driving the plasma display panel of the present invention.

As such, when adjusting the slope of the setdown pulse supplied to the scan electrode of the sustain electrode, it is preferable to also adjust the reference voltage supplied to the sustain electrode corresponding thereto.

FIG. 22 is a diagram for describing a method of adjusting a sustain reference voltage supplied to a sustain electrode corresponding to a slope of a setdown pulse supplied to a scan electrode.

Referring to FIG. 22, when adjusting the slope of the setdown pulse supplied to the scan electrode, the sustain reference voltage supplied to the sustain electrode corresponding thereto is adjusted. For example, as the absolute value of the slope of the setdown pulse supplied to the scan electrode of the sustain electrode decreases as shown in FIG. 22, the magnitude of the sustain reference voltage Vz supplied to the corresponding sustain electrode becomes smaller. As shown in FIG. 22, the method of controlling the magnitude of the sustain reference voltage supplied to the sustain electrode of the sustain electrode is the same as that of FIG. 16 of the first method of driving the plasma display panel of the present invention. .

As such, the technical configuration of the present invention described above can be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the foregoing detailed description, and the meaning and scope of the claims are as follows. And all changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above in detail, the present invention adjusts the length of the setup voltage holding period of the setup pulse or at least one of the sustaining electrode groups including one or more sustaining electrodes, or sets the length of the holding period of the setup reference voltage by adjusting the down time. By adjusting the time difference from the end of the period to the time point at which the address discharge occurs, by preventing the loss of wall charges required at the address discharge, the address discharge is stabilized, thereby improving the image quality.

Claims (54)

A plasma display panel including a plurality of sustain electrodes including scan electrodes and sustain electrodes; A driving unit for driving the plurality of sustain electrodes; And One or more sustain electrode groups of the plurality of sustain electrode groups including one or more sustain electrodes according to the scanning order by controlling the driving unit may have different lengths of setup voltage sustain periods of the setup pulses supplied to the scan electrodes of the sustain electrodes in the reset period. A driving pulse controller different from the sustain electrode group; Plasma display device comprising a. The method of claim 1, The driving pulse controller The plurality of storage electrode groups include a first storage electrode group, a second storage electrode group in which a scan order is continuous with the first storage electrode group, and a scan order is slower than that of the first storage electrode group. Wherein the length of the setup voltage holding period of the setup pulse supplied to the scan electrodes of the group is shorter than the length of the setup voltage holding period of the setup pulse supplied to the scan electrodes of the second sustaining electrode group; . The method of claim 2, The driving pulse controller Characterized in that the absolute value of the slope of the setdown pulse supplied to the scan electrodes of the first sustaining electrode group is greater than the absolute value of the slope of the setdown pulse supplied to the scan electrodes of the second sustaining electrode group. Device. The method of claim 3, wherein The driving pulse controller The sustain electrode of the first sustaining electrode group during the period in which the scan electrode of the first sustaining electrode group is supplied with the setdown pulse having a slope greater than the absolute value of the inclination of the setdown pulse supplied to the scan electrode of the second sustaining electrode group. The sustain reference voltage supplied to And a potential higher than the sustain reference voltage supplied to the sustain electrodes of the second sustain electrode group. The method of claim 2, The driving pulse controller And the lowest voltage of the setdown pulse supplied to the scan electrodes of the first sustain electrode group is smaller than the lowest voltage of the setdown pulse supplied to the scan electrodes of the second sustain electrode group. The method of claim 2, The driving pulse controller And a pause period during which a scan pulse is not supplied between a time point at which a scan pulse is supplied to the scan electrodes of the first sustain electrode group and a time point at which the scan pulse is supplied to the scan electrodes of the second sustain electrode group. Plasma display device. The method of claim 6, The driving pulse controller And a length of the pause period is 1 us (microsecond) or more and 50 us (microsecond) or less. The method of claim 1, The driving pulse controller And a setup pulse having the same length of the setup voltage sustain period is applied to the scan electrodes of all the sustain electrodes included in the same sustain electrode group. The method of claim 1, The driving pulse controller Plasma display device characterized in that the difference in the length of the set-up voltage holding period between the two set-up pulses that are continuous in time among the set-up pulses applied to the plurality of sustain electrode groups and the length of the holding period of the set-up voltage is different from each other. . The method of claim 1, The driving pulse controller Plasma display device characterized in that the difference in the length of the set-up voltage holding period between two set-up pulses that are temporally continuous among the set-up pulses applied to the plurality of sustaining electrode groups and differ in length of the holding period of the set-up voltage are different from each other. . A driving method of a plasma display panel in which a plurality of sustain electrodes including scan electrodes and sustain electrodes are formed, In one or more sustain electrode groups of the plurality of sustain electrode groups including one or more sustain electrodes according to the scanning order, the length of the setup voltage sustain period of the setup pulse supplied to the scan electrodes of the sustain electrodes in the reset period is different from that of other sustain electrode groups. A driving method of a plasma display panel, characterized in that. The method of claim 11, The plurality of storage electrode groups include a first storage electrode group, a second storage electrode group in which a scan order is continuous with the first storage electrode group, and a scan order is slower than that of the first storage electrode group. The length of the setup voltage holding period of the setup pulse supplied to the scan electrodes of the group is shorter than the length of the setup voltage holding period of the setup pulse supplied to the scan electrodes of the second sustain electrode group. Way. The method of claim 12, The absolute value of the slope of the setdown pulse supplied to the scan electrode of the first sustaining electrode group is greater than the absolute value of the slope of the setdown pulse supplied to the scan electrode of the second sustaining electrode group. Driving method. The method of claim 13, The sustain electrode of the first sustaining electrode group during the period in which the scan electrode of the first sustaining electrode group is supplied with the setdown pulse having a slope greater than the absolute value of the inclination of the setdown pulse supplied to the scan electrode of the second sustaining electrode group. The sustain reference voltage supplied to And a potential higher than the sustain reference voltage supplied to the sustain electrodes of the second sustain electrode group. The method of claim 12, And the lowest voltage of the setdown pulse supplied to the scan electrodes of the first sustain electrode group is smaller than the lowest voltage of the setdown pulse supplied to the scan electrodes of the second sustain electrode group. The method of claim 12, And a pause period in which the scan pulse is not supplied between a time point at which the scan pulse is supplied to the scan electrodes of the first sustain electrode group and a time point at which the scan pulse is supplied to the scan electrodes of the second sustain electrode group. Driving method of plasma display panel. The method of claim 16, And the length of the pause period is not less than 1 us (microseconds) and less than 50 us (microseconds). The method of claim 11, And a setup pulse having the same length of the setup voltage sustain period is supplied to the scan electrodes of all the sustain electrodes included in the same sustain electrode group. The method of claim 11, The difference in the lengths of the setup voltage holding periods between two setup pulses which are continuous in time among the setup pulses applied to the plurality of sustain electrode groups and differ in lengths of the sustaining periods of the setup voltages is the same. Way. The method of claim 11, The difference in the lengths of the setup voltage holding periods between two setup pulses which are continuous in time among the setup pulses applied to the plurality of sustain electrode groups and differ in length of the sustaining period of the setup voltages is different from each other. Way. A plasma display panel in which a plurality of sustain electrodes including scan electrodes and sustain electrodes are formed; A driving unit for driving the plurality of sustain electrodes; And One or more sustain electrode groups of the plurality of sustain electrode groups including one or more sustain electrodes according to the scanning order by controlling the driving unit maintain different lengths of sustain periods of the setup reference voltages supplied to the scan electrodes of the sustain electrodes in the reset period. A drive pulse controller different from the electrode group; Plasma display device comprising a. The method of claim 21, The driving pulse controller And the setup reference voltage has a sustain voltage (Vs). The method of claim 1 or 21, The driving pulse controller At least one sustain electrode group of the plurality of sustain electrode groups includes a plurality of sustain electrodes, and the scanning order of the scan electrodes of the plurality of sustain electrodes included in the sustain electrode group is continuous in time. Device. The method according to any one of claims 1 to 21 or 22, The driving pulse controller And the number of the storage electrode groups is two or more and less than or equal to the total number of the storage electrodes. The method according to any one of claims 1 to 21 or 22, The driving pulse controller And each sustain electrode group includes the same number of sustain electrodes. The method according to any one of claims 1 to 21 or 22, The driving pulse controller And at least one of each of the storage electrode groups includes a different number of the storage electrodes than the other storage electrode groups. The method according to any one of claims 1 to 21 or 22, The driving pulse controller The sustain electrodes of the sustain electrodes of all the sustain electrode groups may be supplied with a positive sustain reference voltage during a set down period during which a set down pulse is supplied to the scan electrodes of the sustain electrodes and an address period during which a scan reference voltage is supplied. Plasma display device. The method of claim 27, The driving pulse controller And a period in which a set-down pulse is supplied to scan electrodes of at least one of the plurality of storage electrode groups is overlapped with an address period of another storage electrode group. The method of claim 21 or 22, The driving pulse controller The plurality of storage electrode groups include a first storage electrode group, a second storage electrode group in which a scan order is continuous with the first storage electrode group, and a scan order is slower than that of the first storage electrode group. And the length of the sustain period of the setup reference voltage supplied to the scan electrodes of the group is shorter than the length of the sustain period of the setup reference voltage supplied to the scan electrodes of the second sustain electrode group. The method of claim 29, The driving pulse controller Characterized in that the absolute value of the slope of the setdown pulse supplied to the scan electrodes of the first sustaining electrode group is greater than the absolute value of the slope of the setdown pulse supplied to the scan electrodes of the second sustaining electrode group. Device. The method of claim 30, The driving pulse controller The sustain electrode of the first sustaining electrode group during the period in which the scan electrode of the first sustaining electrode group is supplied with the setdown pulse having a slope greater than the absolute value of the inclination of the setdown pulse supplied to the scan electrode of the second sustaining electrode group. The sustain reference voltage supplied to And a potential higher than the sustain reference voltage supplied to the sustain electrodes of the second sustain electrode group. The method of claim 29, The driving pulse controller And the lowest voltage of the setdown pulse supplied to the scan electrodes of the first sustain electrode group is smaller than the lowest voltage of the setdown pulse supplied to the scan electrodes of the second sustain electrode group. The method of claim 29, The driving pulse controller And a pause period during which a scan pulse is not supplied between a time point at which a scan pulse is supplied to the scan electrodes of the first sustain electrode group and a time point at which the scan pulse is supplied to the scan electrodes of the second sustain electrode group. Plasma display device. The method of claim 33, wherein The driving pulse controller And a length of the pause period is 1 us (microsecond) or more and 50 us (microsecond) or less. The method of claim 21 or 22, The driving pulse controller And a reset pulse having the same length of the sustain period of the setup reference voltage is supplied to the scan electrodes of all the sustain electrodes included in the same sustain electrode group. The method of claim 21 or 22, The driving pulse controller The difference in the lengths of the sustain periods of the setup reference voltages between two reset pulses which are temporally continuous among the reset pulses supplied to the plurality of sustain electrode groups and differ in lengths of the sustain periods of the setup reference voltages may be the same. Plasma display device. The method of claim 21 or 22, The driving pulse controller The difference in the length of the sustain period of the setup reference voltage between two reset pulses which are temporally continuous among the reset pulses supplied to the plurality of sustain electrode groups and differ in the length of the sustain period of the setup reference voltage is different from each other. Plasma display device. A driving method of a plasma display panel in which a plurality of sustain electrodes including scan electrodes and sustain electrodes are formed, In one or more sustain electrode groups of the plurality of sustain electrode groups including one or more sustain electrodes in the scanning order, the length of the sustain period of the setup reference voltage supplied to the scan electrode of the sustain electrode is different from that of the other sustain electrode groups. A method of driving a plasma display panel. The method of claim 38, And the magnitude of the setup reference voltage is a sustain voltage (Vs). The method of claim 11 or 38, At least one sustain electrode group of the plurality of sustain electrode groups includes a plurality of sustain electrodes, and the scanning order of the scan electrodes of the plurality of sustain electrodes included in the sustain electrode group is continuous in time. Method of driving. The method according to any one of claims 11 to 38 or 39, And the number of the sustain electrode groups is two or more and less than the total number of the sustain electrodes. The method according to any one of claims 11 to 38 or 39, And each sustain electrode group includes the same number of sustain electrodes. The method according to any one of claims 11 to 38 or 39, And at least one of each of the sustain electrode groups includes a different number of sustain electrodes than other sustain electrode groups. The method according to any one of claims 11 to 38 or 39, The sustain electrodes of the sustain electrodes of all the sustain electrode groups are supplied with a positive sustain reference voltage during a set down period during which a set down pulse is supplied to the scan electrodes of the sustain electrodes and an address period during which a scan reference voltage is supplied. How to drive the display panel. The method of claim 44, And a period in which a set-down pulse is supplied to scan electrodes of at least one of the plurality of storage electrode groups is overlapped with address periods of other storage electrode groups. The method according to any one of claims 11 to 38 or 39, The plurality of storage electrode groups include a first storage electrode group, a second storage electrode group in which a scan order is continuous with the first storage electrode group, and a scan order is slower than that of the first storage electrode group. The length of the sustain period of the setup reference voltage supplied to the scan electrodes of the group is shorter than the length of the sustain period of the setup reference voltage supplied to the scan electrodes of the second sustain electrode group. The method of claim 46, The absolute value of the slope of the setdown pulse supplied to the scan electrode of the first sustaining electrode group is greater than the absolute value of the slope of the setdown pulse supplied to the scan electrode of the second sustaining electrode group. Driving method. The method of claim 47, The sustain electrode of the first sustaining electrode group during the period in which the scan electrode of the first sustaining electrode group is supplied with the setdown pulse having a slope greater than the absolute value of the inclination of the setdown pulse supplied to the scan electrode of the second sustaining electrode group. The sustain reference voltage supplied to And a potential higher than the sustain reference voltage supplied to the sustain electrodes of the second sustain electrode group. The method of claim 46, And the lowest voltage of the setdown pulse supplied to the scan electrodes of the first sustain electrode group is smaller than the lowest voltage of the setdown pulse supplied to the scan electrodes of the second sustain electrode group. The method of claim 46, And a pause period in which the scan pulse is not supplied between a time point at which the scan pulse is supplied to the scan electrodes of the first sustain electrode group and a time point at which the scan pulse is supplied to the scan electrodes of the second sustain electrode group. Driving method of plasma display panel. 51. The method of claim 50, And a length of the pause period is 1 us (microsecond) or more and 50 us (microsecond) or less. The method according to any one of claims 38 to 40, And a reset pulse having the same length of the sustain period of the setup reference voltage is supplied to the scan electrodes of all the sustain electrodes included in the same sustain electrode group. The method according to any one of claims 38 to 40, The difference in the length of the sustain period of the setup reference voltage between two reset pulses which are temporally continuous among the reset pulses supplied to the plurality of sustain electrode groups and differ in the length of the sustain period of the setup reference voltage is the same. How to drive the panel. The method according to any one of claims 38 to 40, The difference in the lengths of the sustain periods of the setup reference voltages between two reset pulses which are temporally continuous among the reset pulses supplied to the plurality of sustain electrode groups and differ in the lengths of the sustain periods of the setup reference voltages is different from each other. How to drive the panel.

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