KR20070107338A - Plasma display apparatus - Google Patents

Abstract

A plasma display apparatus is provided to reduce noise of the plasma display apparatus by adjusting an applying time of a sustain signal, which is supplied to electrodes. A plasma display apparatus includes a plasma display panel(200) and a driver(210). The plasma display panel includes plural electrodes. The driver applies a first sustain signal to the electrodes during a sustain period for generating display discharge and a second sustain signal, which has the same sequence at a different time from other electrode groups, to at least one of plural electrode groups including one or more electrodes. A difference time between applying times of the first and second sustain signals is more than 100ns and less than 1000ns.

Description

Plasma Display Apparatus {Plasma Display Apparatus}

1 is a diagram for explaining a sustain signal used in a conventional plasma display device.

2 is a view for explaining the configuration of the plasma display device of the present invention.

3A to 3B are views for explaining an example of the structure of a plasma display panel included in the plasma display device of the present invention.

FIG. 4 is a diagram for explaining a frame for implementing gradation of an image in the plasma display device of the present invention; FIG.

5 is a view for explaining an example of the operation of the plasma display device of the present invention;

6 is a view for explaining a method of applying a sustain signal in the plasma display device of the present invention.

7A to 7B are diagrams for explaining a method of differently applying a sustain signal at only one of a scan electrode and a sustain electrode;

8A to 8B are diagrams for explaining the case where the difference between the application time points of the sustain signals is differential;

9 is a diagram for explaining a case in which a sustain signal is applied to only one of a scan electrode and a sustain electrode.

10 is a diagram for explaining a first method for dividing a plurality of electrodes into a plurality of scan electrode groups.

FIG. 11 is a diagram for explaining a second method of dividing a plurality of electrodes into a plurality of scan electrode groups. FIG.

FIG. 12 is a diagram for explaining a third method of dividing a plurality of electrodes into a plurality of scan electrode groups. FIG.

FIG. 13 is a view for explaining an example of a method of differently applying a sustain signal for each of a plurality of electrode groups including one or more electrodes. FIG.

FIG. 14 is a view for explaining an example of a method of differently applying a sustain signal for each electrode group when there are three or more electrode groups; FIG.

FIG. 15 is a diagram for explaining a method of differently applying a sustain signal in consideration of line load; FIG.

FIG. 16 is a diagram for explaining the reason why a sustain signal in the same order is applied to two electrode groups having different line loads among a plurality of electrode groups at different points in time; FIG.

FIG. 17 is a diagram for explaining another example of a method of varying the application time of the sustain signal in consideration of the line load. FIG.

FIG. 18 is a view for explaining an example of a method for adjusting a difference between application points of a sustain signal when line loads are different between two electrode groups; FIG.

19 is a view for explaining an example of a method of adjusting the difference between the visible points of the sustain signal when the line load is different between the four electrode groups.

<Explanation of symbols for main parts of the drawings>

200: plasma display panel 210: driver

The present invention relates to a plasma display device (Plasma Display Apparatus).

The plasma display apparatus includes a plasma display panel having electrodes formed thereon, and a driving unit supplying predetermined driving signals to the electrodes of the plasma display panel.

In a plasma display panel, a phosphor layer is formed in a discharge cell divided by a partition wall, and a plurality of electrodes, for example, a scan electrode Y, a sustain electrode Z, and an address electrode X are formed. Is formed.

The driving unit applies a driving signal to the discharge cell through the electrode.

Then, the discharge is generated by the driving voltage applied in the discharge cell. Here, when discharged by the driving voltage in the discharge cell, the discharge gas filled in the discharge cell generates vacuum ultraviolet rays, and the vacuum ultraviolet light emits the phosphor formed in the discharge cell to emit visible light. Generate. The visible light displays an image on the screen of the plasma display panel.

The discharges generated in the discharge cells of the plasma display panel include reset discharges, address discharges, sustain discharges, and the like.

Herein, a sustain signal for generating sustain discharge, that is, display discharge in a conventional plasma display apparatus will be described below.

1 is a view for explaining a sustain signal used in a conventional plasma display device.

Referring to FIG. 1, the conventional plasma display device alternately applies a sustain signal to the scan electrode Y and the sustain electrode Z in the sustain period.

In addition, among the sustain signals applied to the scan electrode Y and the sustain electrode Z, the sustain signals in the same order are substantially the same.

For example, the time point of applying the first sustain signal applied to the Y ₁ scan electrode and the first sustain signal applied to the Y ₂ scan electrode is the same as t1. In this way, the sustain signal applied to the Y _n scan electrode is also Y. _The popular time point is t1 similarly to the _one scan electrode and the Y ₂ scan electrode.

In addition, the point of application of the first sustain signal applied to the Z ₁ sustain electrode and the first sustain signal applied to the Z ₂ sustain electrode is the same as t2. In this manner, the sustain signal applied to the Z _n sustain electrode is also Z ₁ sustain. The popular point of time is t2, similarly to the electrode and the Z ₂ sustain electrode.

As such, when the sustain signal is applied at the same time, noise occurs.

Such noise is generated due to coupling through capacitance of the plasma display panel between adjacent electrodes, and this noise causes a problem of reducing the driving efficiency of the plasma display apparatus by making the discharge unstable.

In addition, such noise causes the occurrence of electromagnetic interference (EMI).

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a plasma display device in which generation of noise is reduced by different application time of a sustain signal between electrodes.

A plasma display device of the present invention for achieving the above object is a plurality of electrode groups including a plasma display panel having a plurality of electrodes, a sustain signal is applied to the electrode in the sustain period for generating display discharge, and at least one electrode At least one of the electrode groups preferably includes a driver for applying a sustain signal in the same order at a different time point than the other electrode groups.

The difference between the application timing of the sustain signal applied to at least one electrode group of the plurality of electrode groups and the application timing of the sustain signal of the same order applied to another electrode group is 100 ns or more and 1000 ns (nanoseconds). It is characterized by the following.

The difference between the application time of the sustain signal applied to at least one electrode group of the plurality of electrode groups and the application time of the sustain signal of the same order applied to other electrode groups is 400 ns (nanoseconds) to 600 ns (nanoseconds). It is characterized by the following.

In addition, another plasma display device of the present invention for achieving the above object is a plasma display panel having a plurality of electrodes, a sustain signal is applied to the electrode in the sustain period for generating a display discharge, and comprises at least one electrode Two electrode groups having different line loads among the plurality of electrode groups may include a driving unit configured to apply a sustain signal in the same order at different time points.

In addition, the difference between the application time point of the sustain signal of the same order that the line load is applied to two different electrode groups of the plurality of electrode groups is characterized in that more than 100ns (nanoseconds) or less than 1000ns (nanoseconds).

In addition, the difference between the application time point of the sustain signal of the same order that is applied to two different electrode groups of the line rod of the plurality of electrode groups is characterized in that more than 400ns (nanoseconds) or less than 600ns (nanoseconds).

In addition, another plasma display device of the present invention for achieving the above object is to apply a sustain signal to the electrode in the sustain period for generating a display discharge, the plasma display panel having a plurality of electrodes, and at least any of the electrodes The sustain signal is applied to one electrode at a different point of time than the other electrode, and a difference between the time points at which the sustain signals are applied in the same order is applied to at least one of the plurality of electrode groups including one or more electrodes. It is desirable to include a drive that makes it different.

In addition, the difference between the application time of the sustain signal applied to at least one electrode of the plurality of electrodes and the application time of the sustain signal in the same order applied to the other electrode is 100ns (nanoseconds) to 1000ns (nanoseconds) or less. It is done.

In addition, the difference between the application time of the sustain signal applied to at least one electrode of the plurality of electrodes and the application time of the sustain signal of the same order applied to the other electrode is 400ns (nanoseconds) to 600ns (nanoseconds) or less. It is done.

The plurality of electrode groups may include a first electrode group and a second electrode group having a larger line load than the first electrode group, and applying the sustain signal in the same order in the second electrode group. The difference between the viewpoints is larger than the first electrode group.

In addition, two or more electrode groups of the plurality of electrode groups may be characterized by including the same number of electrodes.

The number of electrode groups may be two or more and eight or less.

In addition, the electrodes included in at least one electrode group of the plurality of electrode groups may be continuously adjacent to each other.

Hereinafter, a plasma display device of the present invention will be described in detail with reference to the accompanying drawings.

2 is a view for explaining the configuration of the plasma display device of the present invention.

Referring to FIG. 2, the plasma display apparatus of the present invention includes a plasma display panel 200 and a driver 210.

Here, the plasma display panel 200 includes an electrode. Preferably, it includes a scan electrode (Y) and a sustain electrode (Z) and an address electrode (X) intersecting the scan electrode (Y) and the sustain electrode (Z). The discharge cell is formed at a point where the scan electrode Y, the sustain electrode Z, and the address electrode X cross each other.

The driver 210 supplies a driving signal to discharge cells of the plasma display panel 200 in a plurality of subfields included in a frame.

In particular, the driving unit 210 applies a sustain signal to the electrodes in the sustain period for generating the display discharge, and at least one electrode group among the plurality of electrode groups including the one or more electrodes has the same order at different times as the other electrode groups. Apply a sustain signal of.

The driving unit 210, which is a main feature of the plasma display device of the present invention, will be more clearly described later.

Here, an example of the structure of the plasma display panel 200 will be described in detail with reference to FIGS. 3A to 3B.

3A to 3B are views for explaining an example of the structure of the plasma display panel included in the plasma display device of the present invention.

First, referring to FIG. 3A, a plasma display panel according to the present invention includes a front panel including an electrode, preferably a front substrate 301 on which scan electrodes 302 and Y and sustain electrodes 303 and Z are formed. A back panel including a back substrate 311 on which an electrode, preferably an address electrode 313 and X, intersects the scan electrodes 302 and Y and the sustain electrodes 303 and Z described above. 310 is affixed.

Here, the electrodes formed on the front substrate 301, preferably the scan electrodes 302 and Y and the sustain electrodes 303 and Z, generate a discharge in a discharge space, that is, a discharge cell, and at the same time Maintain the discharge.

The dielectric layer, preferably on the upper surface of the front substrate 301 on which the scan electrodes 302 and Y and the sustain electrodes 303 and Z are formed, covers the scan electrodes 302 and Y and the sustain electrodes 303 and Z. Upper dielectric layer 304 is formed.

This upper dielectric layer 304 limits the discharge current of the scan electrodes 302 and Y and the sustain electrodes 303 and Z and insulates the scan electrodes 302 and Y from the sustain electrodes 303 and Z.

A protective layer 305 is formed on the top surface of the upper dielectric layer 304 to facilitate a discharge condition. The protective layer 305 is formed through a method of depositing a material such as magnesium oxide (MgO) over the upper dielectric layer 304.

On the other hand, the electrodes formed on the rear substrate 311, preferably the address electrodes 313 and X, are electrodes for supplying a data signal to the discharge cells.

A dielectric layer, preferably a lower dielectric layer 315 is formed on the rear substrate 311 on which the address electrodes 313 and X are formed to cover the address electrodes 313 and X.

This lower dielectric layer 315 insulates the address electrodes 313, X.

A discharge space, that is, a partition 312 such as a stripe type or a well type for partitioning the discharge cells is formed on the lower dielectric layer 315. Accordingly, discharge cells such as red (R), green (G), and blue (B) are formed between the front substrate 301 and the rear substrate 311.

Here, a predetermined discharge gas is filled in the discharge cell partitioned by the partition 312.

In addition, a phosphor layer 314 is formed in a discharge cell partitioned by the partition 312 to emit visible light for image display during address discharge. For example, red (R), green (G), and blue (B) phosphor layers may be formed.

In the plasma display panel of the present invention described above, the driving signal is driven by the driving unit 210 of FIG. 2 with at least one of the scan electrodes 302, Y, the sustain electrodes 303, Z, and the address electrodes 313, X. When is supplied, discharge occurs in the discharge cell partitioned by the partition 312.

Then, vacuum ultraviolet rays are generated in the discharge gas filled in the discharge cells, and the vacuum ultraviolet rays are applied to the phosphor layer 314 formed in the discharge cells. Then, a predetermined visible light is generated in the phosphor layer 314, and the visible light is emitted to the outside through the front substrate 301 on which the upper dielectric layer 304 is formed, and thus the front substrate 301. A predetermined image is displayed on the outer surface of the.

Meanwhile, in the description of FIG. 3A, only the case where the scan electrodes 302 and Y and the sustain electrodes 303 and Z are formed of one layer each has been illustrated and described. Alternatively, the scan electrodes 302 and Y or It is also possible that at least one of the sustain electrodes 303 and Z consists of a plurality of layers. This will be described with reference to FIG. 3B.

Referring to FIG. 3B, the scan electrodes 302 and Y and the sustain electrodes 303 and Z may be formed of two layers, respectively.

In particular, in consideration of light transmittance and electrical conductivity, the scan electrodes 302 and Y and the sustain electrodes 303 and Z are opaque silver (Ag) in order to emit light generated in the discharge cell to the outside and to secure driving efficiency. Bus electrodes 302b and 303b and transparent electrodes 302a and 303a made of transparent indium tin oxide (ITO).

As such, the reason why the scan electrodes 302 and Y and the sustain electrodes 303 and Z include the transparent electrodes 302a and 303a is that when visible light generated in the discharge cells is emitted to the outside of the plasma display panel. To be released effectively.

In addition, the reason why the scan electrodes 302 and Y and the sustain electrodes 303 and Z include the bus electrodes 302b and 303b is that the scan electrodes 302 and Y and the sustain electrodes 303 and Z are transparent electrodes. In the case of including only 302a and 303a, the driving efficiency can be reduced because the electrical conductivity of the transparent electrodes 302a and 303a is relatively low, so that the transparent electrodes 302a and 303a can cause such a reduction in the driving efficiency. To compensate for the low electrical conductivity.

3A to 3B, only one example of the plasma display panel of the present invention is shown and described, and the present invention is not limited to the plasma display panel having the structure shown in FIGS. 3A to 3B. For example, the plasma display panel of FIGS. 3A to 3B shows only the case where the upper dielectric layer 304 and the lower dielectric layer 315 are one layer each, but the upper dielectric layer 304 and At least one or more of the lower dielectric layers 315 may be formed of a plurality of layers.

An example of the operation of the plasma display apparatus of the present invention including the plasma display panel will be described with reference to FIGS. 4 to 5.

FIG. 4 is a diagram for explaining a frame for implementing gray levels of an image in the plasma display apparatus of the present invention.

5 is a view for explaining an example of the operation of the plasma display device of the present invention in detail.

First, referring to FIG. 4, in the plasma display apparatus of the present invention, a frame for implementing gray levels of an image is divided into several subfields having different emission counts. Although not shown, each subfield has a reset period for initializing all discharge cells, an address period for selecting discharge cells to be discharged, and a sustain period for implementing gradation according to the number of discharges. It can be divided into (Sustain Period).

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

Meanwhile, the gray scale weight of the corresponding subfield may be set by adjusting the number of sustain pulses supplied in the sustain period. That is, a predetermined gray scale weight can be given to each subfield using the sustain period. For example, the gray scale weight of each subfield is 2 ⁿ by setting the gray scale weight of the first subfield to 2 ⁰ and the gray scale weight of the second subfield to 2 ¹ (where n = 0, 1). , 2, 3, 4, 5, 6, and 7) to increase the gray scale weight of each subfield. As such, by adjusting the number of sustain pulses supplied in the sustain period of each subfield according to the gray scale weight in each subfield, gray levels of various images are realized.

The plasma display device of the present invention uses a plurality of frames to display an image of one second. For example, 60 frames are used to display an image of 1 second.

In FIG. 4, only one frame is composed of eight subfields. However, the number of subfields forming one frame may be variously changed. For example, one frame may be configured with 12 subfields from the first subfield to the twelfth subfield, or one frame may be configured with 10 subfields.

The image quality of the image implemented by the plasma display apparatus implementing the gray level of the image using the frame may be determined according to the number of subfields included in the frame. That is, when 12 subfields are included in a frame, gray levels of 2 ¹² images may be expressed. When 8 subfields are included in a frame, gray levels of 2 ⁸ images may be realized.

In addition, in FIG. 4, subfields are arranged in increasing order of gray scale weight in one frame. Alternatively, subfields may be arranged in order of decreasing gray scale weight in one frame, or gray scale. Subfields may be arranged regardless of the weight.

Next, referring to FIG. 5, an example of an operation of the plasma display apparatus of the present invention in any one of a plurality of subfields included in a frame as shown in FIG. 4 is illustrated.

Referring to FIG. 5, in the plasma display apparatus of FIG. 2, the driver 210 may apply a ramp-up signal in which a voltage gradually increases to the scan electrode Y in a setup period of a reset period. have.

Due to this rising ramp signal, a weak dark discharge, that is, a setup discharge, occurs in the discharge cell. This setup discharge causes a certain amount of wall charges to accumulate in the discharge cell.

In addition, in the set-down period after the setup period, a ramp-down that ramps down gradually from a predetermined positive voltage lower than the peak voltage of the ramp-up signal after applying the ramp lamp signal to the scan electrode Y. Signal can be applied.

As a result, weak erase discharge, that is, set-down discharge, occurs in the discharge cell. This set-down discharge erases a part of the wall charges accumulated in the discharge cell by the previous setup discharge, and the wall charges such that the address discharge can be stably generated in the discharge cell remain uniformly.

In the address period after the reset period including the set-up period and the set-down period, a scan signal Scan falling from the scan reference voltage Vsc may be applied to the scan electrode Y. Such a scan signal preferably has a negative scan voltage (-Vy).

In addition, the driver 210 may apply a data signal to the address electrode X when the scan signal Scan is applied to the scan electrode Y.

In addition, the sustain bias signal Vzb may be applied to the sustain electrode Z in the address period in order to prevent the occurrence of an erroneous discharge due to the interference of the sustain electrode Z in the address period.

In the address period, the voltage difference between the negative scan voltage (-Vy) of the scan signal Scan and the data voltage Vd of the data signal and the wall voltage generated by the wall charges generated in the reset period are added to the data signal. An address discharge is generated in the discharge cell applied.

In this discharge cell selected by the address discharge, wall charges are formed such that the discharge can occur when the sustain signal SUS of the sustain pulse is applied.

In this sustain period after the address period, display discharge occurs. That is, sustain discharge occurs.

For this purpose, the driving unit 210 applies a sustain signal SUS to the scan electrode Y and / or the sustain electrode Z.

Then, the discharge cell selected by the address discharge has the scan electrode (Y) and the sustain electrode when the sustain voltage (S) is applied while the wall voltage in the discharge cell and the voltage of the sustain signal (SUS), that is, the sustain voltage (Vs) are added. Sustain discharge, that is, display discharge, occurs between (Z). Accordingly, a predetermined image is implemented on the plasma display panel.

Herein, a method of applying the sustain signal to the scan electrode Y and / or the sustain electrode Z in the sustain period in which the display discharge occurs as described above will be described in detail.

6 is a view for explaining a method of applying a sustain signal in the plasma display device of the present invention.

Referring to FIG. 6, the driving unit 210 of FIG. 2 applies a sustain signal in the same order to two electrodes, for example, the Y ₁ scan electrode and the Y ₂ scan electrode, at different points in time.

For example, the first sustain signal Y-SUS1 applied to the Y ₁ scan electrode and the first sustain signal Y-SUS1 ′ applied to the Y ₂ scan electrode are different from each other by the time?

In addition, the second sustain signal (Y-SUS2) applied to the Y ₁ scan electrode and the second sustain signal (Y-SUS2 ') applied to the Y ₂ scan electrode are also different from each other by Δt1 and the Y ₁ scan electrode is applied. It is preferable that the third sustain signal (Y-SUS3) applied to the third sustain signal (Y-SUS3 ') applied to the Y ₂ scan electrode is also different from the application point by? T1.

In addition, the driving unit 210 of FIG. 2 applies the sustain signals in the same order to two electrodes, for example, the Z ₁ sustain electrode and the Z ₂ sustain electrode, at different points in time.

For example, the first sustain signal Z-SUS1 applied to the Z ₁ sustain electrode and the first sustain signal Z-SUS1 ′ applied to the Z ₂ sustain electrode are different from each other by Δt 2.

In addition, the second sustain signal (Z-SUS2) applied to the Z ₁ sustain electrode and the second sustain signal (Z-SUS2 ') applied to the Z ₂ sustain electrode are also different from each other by Δt2, and the Z ₁ sustain electrode is applied. It is preferable that the third sustain signal Z-SUS3 applied to the third sustain signal Z-SUS3 'applied to the Z ₂ sustain electrode is also different from the application point by? T2.

Here, the difference Δt1 of the application point of the sustain signal between the scan electrodes and the difference Δt2 of the application point of the sustain signal between the sustain electrodes may be substantially the same or may be different.

6 illustrates only a case in which the sustain signal is a type in which the sustain signal rises from the voltage at the ground level GND to the sustain voltage Vs. However, the sustain signal is determined from the predetermined positive bias voltage Vx. The type of rising to the sum of Vs) and the bias voltage Vx, that is, the voltage of Vs + Vx is also possible, and the difference between the sustain voltage Vs and the bias voltage Vx from a predetermined negative bias voltage (-Vx). That is, the type of rising to the voltage of Vs-Vx is also possible.

That is, the sustain signal used by the plasma display device of the present invention can be changed into various types.

As such, when the application time of the sustain signal is different from each other, the coupling effect is reduced through the capacitance of the plasma display panel between adjacent electrodes when the sustain signal is applied. As a result, generation of noise is reduced. This stabilizes the overall driving of the plasma display device.

In addition, as the occurrence of noise is reduced, the occurrence of electromagnetic interference (EMI) is reduced.

In addition, when the application time of the sustain signal is different from one electrode to another, the center of discharge of the sustain discharge generated by the sustain signal is dispersed, thereby increasing the overall luminance.

Here, it is preferable that the difference between the timings of applying the sustain signals in the same order is 100 ns (nanoseconds) or more and 1000 ns (nanoseconds) or less in consideration of reduction of noise generation and efficiency of sustain discharge. More preferably, the difference between the application time points of the sustain signals in the same order is 200 ns (nanoseconds) or more and 600 ns (nanoseconds) or less.

The reason why the difference between the application time points of the sustain signals in the same order is 100 ns (nanoseconds) or more than 1000 ns (nano second) is, for example, when the difference between the application time points of the sustain signals is less than 100 ns (nanoseconds). When the coupling effect is not sufficiently weakened, the possibility of noise is relatively increased may increase, whereas when the difference between the time points of the sustain signal application exceeds 1000 ns (nanoseconds), the time difference between the sustain signals, that is, the sustain discharge This is because the possibility of reducing the overall brightness may increase by excessively increasing the time difference between them.

In FIG. 6, the application time of the sustain signal is different between the scan electrodes Y, and the application time of the sustain signal is different between the sustain electrodes Z. It is also possible to change the application time of the sustain signal only in one of the scan electrode Y and the sustain electrode Z.

This will be described with reference to FIGS. 7A to 7B.

7A to 7B are diagrams for explaining a method of differently applying a sustain signal at only one of a scan electrode and a sustain electrode.

First, referring to FIG. 7A, the driving unit 210 of FIG. 2 applies sustain signals of the same order to two scan electrodes Y, for example, the Y ₁ scan electrode and the Y ₂ scan electrode at different time points.

For example, the first sustain signal Y-SUS1 applied to the Y ₁ scan electrode and the first sustain signal Y-SUS1 ′ applied to the Y ₂ scan electrode are different from each other by the time?

On the other hand, the driving unit 210 of FIG. 2 applies the same sustain signals in the same order to _two sustain electrodes Z, for example, Z ₁ sustain electrode and Z ₂ sustain electrode.

In other words, changing the application time of the sustain signal is applied only to the scan electrode (Y).

Next, referring to FIG. 7B, the driving unit 210 of FIG. 2 applies sustain signals of the same order to two sustain electrodes Z, for example, the Z ₁ sustain electrode and the Z ₂ sustain electrode, at different points in time.

For example, Z ₁ sustain electrodes the first sustain signal (SUS1-Z) and Z ₂ the first sustain signal (SUS1-Z ') applied to the sustain electrode is applied to the point I is the difference of Δt1.

On the other hand, the driving unit 210 of FIG. 2 applies the sustain signals in the same order to _two scan electrodes Y, for example, the Y ₁ scan electrode and the Y ₂ scan electrode, at substantially the same time.

In other words, a different application point of the sustain signal is applied only to the sustain electrode (Z).

On the other hand, it is also possible to differentially set the difference between the application time of the sustain signal, which will be described with reference to Figures 8a to 8b attached.

8A to 8B are diagrams for explaining the case where the difference between the application time points of the sustain signals is differential.

First, referring to FIG. 8A, the driving unit 210 of FIG. 2 applies a sustain signal in the same order to two electrodes, for example, the Y ₁ scan electrode and the Y ₂ scan electrode at different points in time. Here, the difference between the application time points is set differentially.

For example, the first sustain signal Y-SUS1 applied to the Y ₁ scan electrode and the first sustain signal Y-SUS1 ′ applied to the Y ₂ scan electrode are set to be different from each other by Δt 1.

On the other hand, Y ₁ second sustain signal (Y-SUS2) and Y ₂ the second sustain signal (Y-SUS2 ') applied to the scan electrode is applied to the time applied to the scan electrode is set until it difference of Δt2, and Y _one scan electrode is the third sustain signals (SUS3-Y) and Y ₂ is the third sustain signals (SUS3-Y ') is the scan electrodes to which is applied a time difference by Δt3 nadorok set.

The sustain signal applied to the sustain electrode Z may be different or the same at the time of application.

Next, referring to FIG. 8B, the driving unit 210 of FIG. 2 applies sustain signals in the same order to two electrodes, for example, a Z ₁ sustain electrode and a Z ₂ sustain electrode, at different points in time. Here, the difference between the application time points is set differentially.

For example, the first sustain signal Z-SUS1 applied to the Z ₁ sustain electrode and the first sustain signal Z-SUS1 ′ applied to the Z ₂ sustain electrode are set to be different from each other by Δt1.

On the other hand, Z ₁ is the second sustain signal (Z-SUS2) and Z ₂ the second sustain signal (Z-SUS2 ') applied to the sustain electrode is applied to the sustain electrode point, the difference of Δt2 nadorok set, and Z _The third sustain signal Z-SUS3 applied to the first sustain electrode and the third sustain signal Z-SUS3 'applied to the Z ₂ sustain electrode are set to be different from each other by Δt3.

The sustain signal applied to the scan electrode Y may be different or the same at the time of application.

In this way, it is also possible to change the application time of the sustain signal only in one of the scan electrode Y and the sustain electrode Z.

Meanwhile, although only the case where the sustain signal is alternately applied to the scan electrode Y and the sustain electrode Z has been illustrated and described above, the sustain signal is only applied to either the scan electrode Y or the sustain electrode Z. It is also possible to apply. This will be described with reference to FIG. 9.

9 is a diagram for explaining a case in which a sustain signal is applied to only one of a scan electrode and a sustain electrode.

Referring to FIG. 9, a sustain signal is applied only to the scan electrode Y among the scan electrode Y or the sustain electrode Z. Referring to FIG. Such a sustain signal may be of a type that rises from the ground level GND to the positive sustain voltage (+ Vs) and decreases from the ground level GND to the negative sustain voltage (-Vs) as shown in FIG. 9.

At this time, it is preferable that the sustain electrode Z maintain the voltage of the ground level GND.

In this case, even when the sustain signal is applied to only one of the scan electrode Y and the sustain electrode Z, the application time of the sustain signal is different.

For example, Y ₁ sustain signal (Y-SUS1) and Y ₂ the first amount of the sustain signal (Y-SUS1 ') applied to the scan electrode of the first positive (+) applied to the scan electrode is applied to the time Δt1 Set to make a difference.

In addition, Y ₁ first sound applied to the scan electrode - sustain signal (Y-SUS2) and Y ₂ sustain signal (Y-SUS2 ') of the first sound applied to the scan electrode is applied to the time difference by Δt2 of () Set to appear.

In this way, even when the sustain signal is applied to only one of the scan electrode (Y) and the sustain electrode (Z), it is possible to change the application time of the sustain signal.

As such, different application points of the sustain signal may be applied to all electrodes. For example, the point of applying the sustain signal may be different from each other in all scan electrodes Y from the Y ₁ scan electrode to the Yn scan electrode, or the point of applying the sustain signal may be all the sustain electrodes from the Z ₁ sustain electrode to the Zn sustain electrode. It is possible to differ from each other in (Z).

On the other hand, it is also possible to divide the plurality of electrodes into a plurality of electrode groups and to vary the application time of the sustain signal for each of the divided electrode groups. This is as follows.

In order to facilitate understanding of the present invention, a method of dividing a plurality of electrodes into a plurality of electrode groups will be described with reference to FIGS. 10 to 12.

FIG. 10 is a diagram for describing a first method of dividing a plurality of electrodes into a plurality of scan electrode groups.

11 is a diagram for explaining a second method of dividing a plurality of electrodes into a plurality of scan electrode groups.

12 is a diagram for explaining a third method of dividing a plurality of electrodes into a plurality of scan electrode groups.

First, referring to FIG. 10, in the first method of dividing a plurality of electrodes of the plasma display panel into a plurality of electrode groups, the plasma display panel 1000 includes a total of 100 scan electrodes Y and 100 sustain electrodes Z. Assuming that the plurality of scan electrodes Y and the sustain electrodes Z are divided into the A electrode group 1010 and the B electrode group 1020.

Here, an electrode pair including a Y ₁ scan electrode and a Z ₁ sustain electrode is called a first electrode, and an electrode pair including a Y ₂ scan electrode and a Z ₂ sustain electrode is called a second electrode. In this way, a Y ₁₀₀ scan electrode And an electrode pair including a Z ₁₀₀ sustain electrode is called a 100th electrode.

For example, the A electrode group 1010 includes the Y ₁ scan electrode and the Z ₁ sustain electrode, that is, the first electrode to the Y ₅₀ scan electrode and the Z ₅₀ sustain electrode, that is, the 50th electrode, and the B electrode group 1020. ) May be divided to include the Y ₅₁ scan electrode and the Z ₅₁ sustain electrode, that is, the 51 st electrode to the Y ₁₀₀ scan electrode and the Z ₁₀₀ sustain electrode, ie, the 100 th electrode.

Here, it is preferable that all the electrodes included in at least one electrode group of the plurality of electrode groups are continuously adjacent to each other. In other words, a predetermined number of spatially continuous scan electrodes Y and sustain electrodes Z are bundled together and set as an electrode group.

Meanwhile, although the plurality of electrodes formed in one plasma display panel are divided into two electrode groups in FIG. 10, the number of electrode groups may be different from that in FIG. 10. This will be described with reference to FIG. 11.

Referring to FIG. 11, a plurality of electrodes are divided into an A electrode group 1110, a B electrode group 1120, a C electrode group 1130, and a D electrode group 1140.

For example, the A electrode group 1110 includes the Y ₁ scan electrode and the Z ₁ sustain electrode, that is, the first electrode to the Y ₂₅ scan electrode and the Z ₂₅ sustain electrode, that is, the 25 th electrode, and the B electrode group 1120. ) Includes a Y ₂₆ scan electrode and a Z ₂₆ sustain electrode, that is, a 26th electrode to a Y ₅₀ scan electrode and a Z ₅₀ sustain electrode, that is, a 50th electrode, and the C electrode group 1130 includes a Y ₅₁ scan electrode and a Z ₅₁ electrode. The sustain electrode, i.e., the 51st electrode to the Y ₇₅ scan electrode and the Z ₇₅ sustain electrode, i.e., the 75th electrode, and the D electrode group 1140 includes the Y ₇₆ scan electrode and the Z ₇₆ sustain electrode, i.e., the 76th electrode to Y _It may be divided to include ₁₀₀ scan electrodes and Z ₁₀₀ sustain electrodes, that is, up to the 100th electrode.

Herein, when the number of electrode groups described above is at least two and smaller than the total number of electrode pairs, that is, the total number of electrode pairs including one scan electrode Y and one sustain electrode Z is n. It can be set between 2 ≦ N ≦ (n−1).

In FIG. 11, the number of electrodes included in each electrode group 1110, 1120, 1130, and 1140 is the same, but the number of electrodes included in at least one or more electrode groups among the plurality of electrode groups is different from that of other electrode groups. It can also be set. This will be described with reference to FIG. 12.

Referring to FIG. 12, a plurality of electrodes are formed on the plasma display panel 1200 by using the A electrode group 1210, the B electrode group 1220, the C electrode group 1230, the D electrode group 1240, and the E electrode group 1250. Divide by.

For example, the A electrode group 1210 includes the Y ₁ scan electrode and the Z ₁ sustain electrode, that is, the first electrode to the Y ₁₀ scan electrode and the Z ₁₀ sustain electrode, that is, the tenth electrode, and the B electrode group 1220. ) Includes a Y ₁₁ scan electrode and a Z ₁₁ sustain electrode, that is, an eleventh electrode to a Y ₁₅ scan electrode and a Z ₁₅ sustain electrode, that is, a 15th electrode, and the C electrode group 1230 includes a Y ₁₆ scan electrode and a Z ₁₆ electrode. A sustain electrode, that is, a sixteenth electrode, and the D electrode group 1240 includes a Y ₁₇ scan electrode and a Z ₁₇ sustain electrode, ie, a seventeenth electrode, to a Y ₆₀ scan electrode and a Z ₆₀ sustain electrode, that is, a sixtieth electrode. In addition, the E electrode group 1250 may be divided to include the Y ₆₁ scan electrode and the Z ₆₁ sustain electrode, that is, from the 61st electrode to the Y ₁₀₀ scan electrode and the Z ₁₀₀ sustain electrode, that is, the 100th electrode.

As described above, in at least one of the plurality of electrode groups, the number of electrodes included is different from other electrode groups. 12 illustrates a case where the number of electrodes included in all of the electrode groups 1210, 1220, 1230, 1240, and 1250 are all different.

In addition, the above-described C electrode group 1230 is an electrode group including only one electrode, that is, a Y ₁₆ scan electrode and a Z ₁₆ sustain electrode, that is, a sixteenth electrode. Unlike the other electrode groups, one electrode is one electrode. This is the case of forming an electrode group.

As such, it is preferable that all the electrodes included in the electrode group are continuously adjacent to each other, except that one electrode forms one electrode group.

Here, each electrode group includes a different number of electrodes. Alternatively, only a predetermined number of electrode groups selected from the plurality of electrode groups may include a different number of electrodes than the other electrode groups. For example, the A electrode group includes 10 electrodes, the B electrode group includes another 10 electrodes, and the subsequent C electrode group, D electrode group, E electrode group, and F electrode group are each 20 pieces. It is also possible to include an electrode of.

Looking at the method of changing the application time of the sustain signal for each electrode group divided by this method as follows.

FIG. 13 is a view for explaining an example of a method of differently applying a sustain signal when a plurality of electrode groups including one or more electrodes are included.

Referring to FIG. 13, the driving unit 210 of FIG. 2 applies a sustain signal in the same order to at least one electrode group among a plurality of electrode groups including one or more electrodes at different time points from another electrode group.

For example, when the plurality of electrodes are divided into the A electrode group and the B electrode group as shown in FIG. 10, the sustain signals in the same order are applied to the A electrode group and the B electrode group at different points in time. For example, the sustain signal applied to the A electrode group and the sustain signal applied to the B electrode group are different from each other by? T.

On the other hand, in one electrode group, it is preferable to apply the sustain signals in the same order to all the electrodes at substantially the same time point.

For example, a sustain signal is applied to all the electrodes included in the A electrode group, that is, the first electrode to the 50th electrode at substantially the same time point, and all the electrodes included in the B electrode group, that is, the 51th electrode to the 100th electrode. It is preferable that the sustain signal is applied to the electrode at substantially the same point in time.

If the concept of the electrode group described above with reference to FIGS. 10 to 13 is applied to FIG. 6, FIG. 6 illustrates that the Y ₁ scan electrode and the Z ₁ sustain electrode, that is, the first electrode form one electrode group, and the Y ₂ scan electrode and Z _{The second} sustain electrode, that is, the second electrode is substantially the same as when forming another electrode group.

As described above, the application time of the sustain signal from at least one electrode group among the plurality of electrode groups including at least one electrode and the application time of the sustain signal from the other electrode group are different from those of FIGS. 7A to 7B. As shown in FIG. 8A to FIG. 8B, the difference between the time points of applying the sustain signal is differentially applied to only one of the scan electrode Y and the sustain electrode Z as shown in FIG. Alternatively, as shown in FIG. 9, the present invention may be applied to a method of applying a sustain signal to only one of the scan electrode (Y) and the sustain electrode (Z). However, since the content has already been described in detail above, further description will be omitted.

Next, FIG. 14 is a view for explaining an example of a method of differently applying a sustain signal for each electrode group when there are three or more electrode groups.

Referring to FIG. 14, when the plurality of electrodes are divided into an A electrode group, a B electrode group, a C electrode group, and a D electrode group as in FIG. 11, the A electrode group, the B electrode group, the C electrode group, and the D electrode group are described. Each group is supplied with the same sustain signal at different points in time.

For example, the sustain signal applied to the A electrode group and the sustain signal applied to the B electrode group are different from each other by Δt1.

In addition, the sustain signal applied to the B electrode group and the sustain signal applied to the C electrode group differ by Δt2, and the sustain signal applied to the C electrode group and the sustain signal applied to the D electrode group are applied. Difference by Δt3.

As a result, the difference between the application time points of the sustain signals of the A electrode group and the B electrode group is Δt1, and the difference between the application time points of the sustain signals of the A electrode group and the C electrode group is Δt1 + Δt2. The difference between the time points at which the sustain signals are applied is Δt1 + Δt2 + Δt3.

As such, when the application time of the sustain signal is changed for each electrode group, not only noise is reduced as described in detail above, but the entire driving can be prevented from being excessively complicated.

For example, in the case where the total number of electrodes is 100, if the application time of the sustain signal is different for each electrode, a total of 100 control types are required.

On the other hand, in the case of FIG. 13, since the number of electrode groups is two, the application time of the sustain signal applied to the A electrode group and the B electrode group can be changed only by two types of control.

In addition, in the case of FIG. 14, since the number of electrode groups is four, the application time of the sustain signal applied to the A electrode group, the B electrode group, the C electrode group, and the D electrode group can be different from each other only by controlling the four types. It can be.

Here, in consideration of preventing the entire drive from becoming complicated and reducing the occurrence of noise, the number of electrode groups is preferably two or more and eight or less.

In addition, the difference between the application time points of the sustain signals in the two electrode groups among the plurality of electrode groups is preferably 100 ns (nanoseconds) or more and 1000 ns (nanoseconds) or less in consideration of reduction of noise generation and efficiency of sustain discharge. More preferably, the difference between the application time points of the sustain signals in the same order is 200 ns (nanoseconds) or more and 600 ns (nanoseconds) or less.

On the other hand, it is also possible to change the application time of the sustain signal in consideration of the line load (Line Load). This is as follows.

FIG. 15 is a view for explaining a method of differently applying a sustain signal in consideration of line load.

Referring to FIG. 15, an image of a window pattern 1540 may be displayed on the plasma display panel 1500. Such an image may be displayed when a portion of the window pattern 1540 is turned off on the plasma display panel 1500.

In the case where such an image is displayed, the number of discharge cells that are turned on in the region of 1510 and the region of 1520 is different from each other. In more detail, the number of discharge cells which are turned on in the region of 1510 is larger than in the region of 1520.

Accordingly, the line load value of the region 1520 is relatively larger than the region 1510. Of course, the line load value of the region 1530 is relatively larger than the region 1510.

The region 1510 may be defined as an A electrode group, the region 1520 as a B electrode group, and the region 1530 as a C electrode group.

Here, the line load value of the region is preferably the average line load value of the electrodes included in the region. For example, the line load value of the region 1510 is an average line load value of the electrodes included in the region 1510.

Thus, when the line load of the region 1510 and the line load of 1520 are different, the application of the sustain signal applied to the region 1510 and the region 1520 using the method described in detail above. It is desirable to change the application time of the sustain signal.

In this way, the application time of the sustain signal applied to the region 1510 and the application time of the sustain signal applied to the region 1520 are different from each other, i.e., two electrode groups having different line loads among the plurality of electrode groups. The reason for applying the sustain signal in the same order will be described with reference to FIG. 16.

FIG. 16 is a diagram for explaining a reason why a sustain signal in the same order is applied to two electrode groups having different line loads among a plurality of electrode groups at different time points.

Referring to FIG. 16, when the line load value is different for each electrode group, a step may occur in an image displayed on the plasma display panel 1500.

For example, as shown in FIG. 15, when the window pattern 1540 is displayed on the plasma display panel 1500, the line load value of the region 1510 is greater than the line load value of the region 1520.

Then, even if the same driving signal is supplied to the region of 1510 and the region of 1520, the intensity of the discharge occurring in the region of 1510 and the intensity of the discharge occurring in the region of 1520 are different. For example, even when the same voltage of 100V is supplied, the intensity of the discharge generated in the region of the reference numeral 1510 is 90 and the intensity of the discharge generated in the region of the reference numeral 1520 may be 100.

Therefore, a relatively high brightness image, that is, a bright image, is displayed in an area of 1520 where the line load is relatively small, and a relatively low brightness image is displayed in an area of 1510 and 1530 where a line load is relatively large. A dark image may be displayed. As a result, a screen step occurs on the screen.

On the other hand, as in the present invention, when the application time of the sustain signal applied to the region 1510 and the application time of the sustain signal applied to the region 1520 are different, that is, the line load of the plurality of electrode groups When the sustain signals in the same order are applied to the other two electrode groups at different points of time, the sustain discharges are shaken to have a certain pattern such that the centers of the sustain discharges are dispersed, thereby compensating the luminance for each electrode group.

Accordingly, the screen difference is reduced by compensating for the luminance difference between the image of the region of 1510 and the image of the region of 1520.

Next, FIG. 17 is a view for explaining another example of a method of changing the application time of the sustain signal in consideration of the line load.

Referring to FIG. 17, a plurality of electrodes are divided into an A electrode group 1710, a B electrode group 1720, a C electrode group 1730, and a D electrode group 1740, as shown in FIG. 11, and a plasma display panel. The line rods of the A electrode group 1710, the line rod of the B electrode group 1720, the line rod of the C electrode group 1730, and the line rod of the D electrode group 1740 are different from each other on the 1700. Assume that the tower-shaped image 1750 is displayed.

In these cases. Preferably, the same sustain signals are applied to the A electrode group 1710, the B electrode group 1720, the C electrode group 1730, and the D electrode group 1740 at different times.

For example, as shown in FIG. 14, the sustain signal applied to the A electrode group and the sustain signal applied to the B electrode group are different from each other by Δt1, and the sustain signal and the C electrode group applied to the B electrode group. The sustain signal to be applied is such that the point of application is different by Δt2, and the sustain signal to be applied to the C electrode group and the sustain signal to the D electrode group are to be different by Δt3.

That is, sustain signals of the same order are applied to two electrode groups having different line loads among a plurality of electrode groups including one or more electrodes.

As described above, the application time of the sustain signal may be changed in consideration of the line load.

In addition, in the two electrode groups having different line loads among the plurality of electrode groups, the difference between the timings of applying the sustain signals in the same order is 100 ns or more and 1000 ns or less, considering noise reduction and sustain discharge efficiency. desirable. More preferably, the difference between the application time points of the sustain signals in the same order is 200 ns (nanoseconds) or more and 600 ns (nanoseconds) or less.

On the other hand, in addition to the method described above, it is also possible to change the application time of the sustain signal in consideration of the line load. This will be described with reference to FIGS. 18 through 19.

FIG. 18 is a diagram for explaining an example of a method of adjusting a difference between application points of a sustain signal when a line load is different between two electrode groups.

19 is a view for explaining an example of a method of adjusting the difference between application point of the sustain signal when the line load is different between the four electrode groups.

First, in FIG. 18, it is assumed that a plurality of electrodes are divided into two electrode groups, that is, an A electrode group and a B electrode group, as shown in FIG. 10, and line load values of the A electrode group and the B electrode group are different from each other.

Here, in each electrode group, a sustain signal is applied to at least one of the plurality of electrodes at a different point in time from the other electrode.

The difference between the application time of the sustain signal in the A electrode group and the application time of the sustain signal in the B electrode group is different.

In addition, when the line load value of the B electrode group is larger than the line load value of the A electrode group, the difference between the time points at which the sustain signals are applied in the B electrode group is greater than the difference between the time points at which the sustain signals are applied in the B electrode group. I can make it big.

For example, the A electrode group includes a Y ₁ scan electrode and a Z ₁ sustain electrode, that is, a first electrode, a Y ₂ scan electrode, and a Z ₂ sustain electrode, that is, a second electrode, and the B electrode group includes a Y _a scan electrode and Suppose _a Z _a sustain electrode, that is, _{a first} electrode, a Y _{a + 1} scan electrode, and a Z _{a + 1} sustain electrode, that is, a a + 1 electrode.

Then, as in (a), the sustain signal (Y-SUS1) applied to the Y ₁ scan electrode of the A electrode group and the sustain signal (Y-SUS2) applied to the Y ₂ scan electrode are different from each other by Δt1. can do.

On the other hand, as in (b), the sustain signal (Y-SUS1) applied to the Y ₁ scan electrode of the B electrode group and the sustain signal (Y-SUS2) applied to the Y ₂ scan electrode are larger than Δt1. The difference can be made by Δt2.

As described above, if the difference between the application time points of the sustain signals in the electrode group having a relatively large line load is larger than that in the electrode group having a relatively small line load, the screen step as shown in FIG. 16 can be more effectively reduced.

Next, in FIG. 19, a plurality of electrodes are divided into an A electrode group, a B electrode group, a C electrode group, and a D electrode group, as shown in FIG. 11, and the line rod of the B electrode group on the plasma display panel is defined as Assume that it is larger than the line rod, the line rod of the C electrode group is larger than the line rod of the B electrode group, and the line rod of the D electrode group is larger than the line rod of the C electrode group.

In these cases. Between the time of application of the sustain signal in the A electrode group, the time of application of the sustain signal in the B electrode group, the time of application of the sustain signal in the C electrode group, and the time of application of the sustain signal in the D electrode group The difference is preferably different from each other.

More preferably, the difference between application points of the sustain signals in the B electrode group is greater than the difference between application points of the sustain signals in the A electrode group, and the C electrode group than the difference between application points of the sustain signals in the B electrode group. The difference between the time points at which the sustain signal is applied is greater than that, and the difference between the time points at which the sustain signal is applied to the D electrode group is larger than the difference between the time points at which the sustain signal is applied to the C electrode group.

For example, as shown in FIG. 14, the sustain signal is applied to all the electrodes at the substantially same time point in the A electrode group, that is, the difference between the time points at which the sustain signals are applied is substantially zero, and the sustain signal is applied to the B electrode group. The difference between the points of application of is? T1, the difference between the points of application of the sustain signal applied in the C electrode group is Δt2 greater than Δt1, and the difference between the points of application of the sustain signal applied in the D electrode group is Δt3 greater than Δt2.

As described above, the time point of applying the sustain signal may be different in one electrode group in consideration of the line load.

In addition, it is preferable that the difference between the time points of applying the sustain signals in the same order is 100 ns (nanoseconds) or more and 1000 ns (nanoseconds) or less in consideration of the reduction of noise generation and the efficiency of the sustain discharge. More preferably, the difference between the application time points of the sustain signals in the same order is 200 ns (nanoseconds) or more and 600 ns (nanoseconds) or less.

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 plasma display device of the present invention has an effect of reducing the generation of noise by controlling the application time of the sustain signal applied to the electrode, and thereby driving stability.

In addition, the present invention has the effect of reducing the occurrence of electromagnetic interference (EMI).

In addition, the present invention has the effect of reducing the occurrence of the screen step.

Claims (13)

A plasma display panel having a plurality of electrodes formed thereon; A sustain signal is applied to the electrode in a sustain period for generating display discharge, and a sustain signal of the same order is applied to at least one electrode group among a plurality of electrode groups including at least one electrode at a different time point than the other electrode groups. Driving part Plasma display device comprising a. The method of claim 1, The difference between the application time of the sustain signal applied to at least one electrode group of the plurality of electrode groups and the application time of the sustain signal of the same order applied to another electrode group is 100 ns or more and 1000 ns or less. Plasma display device, characterized in that. The method of claim 2, The difference between the application timing of the sustain signal applied to at least one electrode group of the plurality of electrode groups and the application timing of the sustain signal of the same order applied to another electrode group is 400 ns (nanoseconds) to 600 ns (nanoseconds) or less. Plasma display device, characterized in that. A plasma display panel having a plurality of electrodes formed thereon; A sustain signal is applied to the electrode in the sustain period for generating display discharge, and the sustain signals in the same order are applied to two electrode groups having a different line load among a plurality of electrode groups including one or more electrodes. Drive unit for applying Plasma display device comprising a. The method of claim 4, wherein And a difference between the application time points of the sustain signals in the same order in which the line rods are applied to two different electrode groups among the plurality of electrode groups is 100 ns or more and 1000 ns or less. The method of claim 5, And a difference between the application time points of the sustain signals in the same order to which the line rods are applied to two different electrode groups among the plurality of electrode groups is 400 ns (nanoseconds) to 600 ns (nanoseconds) or less. A plasma display panel having a plurality of electrodes formed thereon; A sustain signal is applied to the electrode in a sustain period for generating display discharge, and the sustain signal is applied to at least one of the electrodes at a different time from another electrode, and among the plurality of electrode groups including at least one electrode. At least one electrode group is a driving unit that makes the difference between the time of applying the sustain signal in the same order different from the other electrode group Plasma display device comprising a. The method of claim 7, wherein The difference between the application time of the sustain signal applied to at least one electrode of the plurality of electrodes and the application time of the sustain signal in the same order applied to the other electrode is 100ns (nanoseconds) to 1000ns (nanoseconds) or less Plasma display device. The method of claim 8, The difference between the application time of the sustain signal applied to at least one electrode of the plurality of electrodes and the application time of the sustain signal in the same order applied to the other electrode is 400ns (nanoseconds) to 600ns (nanoseconds) or less Plasma display device. The method of claim 7, wherein The plurality of electrode groups include a first electrode group and a second electrode group having a larger line load than the first electrode group. And the difference between the application time points of the sustain signals in the same order in the second electrode group is larger than the first electrode group. The method according to claim 1 or 4 or 7, And at least two electrode groups of the plurality of electrode groups comprise the same number of electrodes. The method according to claim 1 or 4 or 7, And the number of electrode groups is two or more and eight or less. The method according to claim 1 or 4 or 7, And at least one electrode group among the plurality of electrode groups is continuously adjacent to each other.

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