KR20090126536A - Plasma display apparatus - Google Patents

Abstract

PURPOSE: A plasma display apparatus is provided to reduce black brightness by supplying first to third reset pulses to a scan electrode for a reset period continuously. CONSTITUTION: A scan electrode and a sustain electrode are arranged in a plasma display panel. A driving unit supplies a first reset pulse(rp1), a second reset pulse(rp2), and a third reset pulse(rp3) to a scan electrode for a reset period. In the first reset pulse, the highest voltage is the second voltage and the lowest voltage is the fourth voltage. In the second reset pulse, the highest voltage is a reference voltage and the lowest voltage is the fourth voltage. In the third reset pulse, the highest voltage is the seventh voltage and the lowest voltage is the eighth voltage.

Description

Plasma Display Apparatus {Plasma Display Apparatus}

The present invention relates to a display device, and more particularly, to a plasma display device.

In general, a plasma display apparatus is formed by attaching a plasma display panel for displaying an image and a driving unit for driving the plasma display panel to a rear surface of the plasma display panel.

In general, a plasma display panel is a partition wall formed between a front panel and a rear panel to form a unit discharge cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He). An inert gas containing a main discharge gas such as and a small amount of xenon is filled. A plurality of unit discharge cells described above are gathered to form one pixel. For example, a red (R) cell, a green (G) cell, and a blue (B) cell may form one pixel.

When a high frequency voltage is applied to such a unit discharge cell to discharge, an inert gas generates vacuum ultra violet rays and emits phosphors formed between the partition walls to realize an image.

The plasma display panel includes a plurality of electrodes, for example, a scan electrode (Y), a sustain electrode (Z), and an address electrode (X), each of which has driving parts for supplying a driving voltage to the electrodes of the plasma display panel. Is connected to.

Each driving unit implements an image by supplying driving pulses, such as a reset pulse in a reset period, a scan pulse in an address period, and a sustain pulse in a sustain period, to the electrodes of the plasma display panel when driving the plasma display panel. will be. Such a plasma display device has been spotlighted as a display device because of its thin and light configuration.

The driving unit for driving such a plasma display panel is a field in which research is being actively conducted based on cost reduction and reliability of circuit operation.

An object of the present invention is to provide a plasma display device capable of reducing black brightness.

In addition, an object of the present invention is to provide a plasma display device that can prevent bright spots and blinking discharge.

The technical problem of the present invention is not limited to the above-mentioned thing, and another technical problem to be achieved by the present invention will be clearly understood by those skilled in the art by the effect of the configuration of the present invention.

According to an embodiment of the present invention, a plasma display device includes a plasma display panel in which a scan electrode and a sustain electrode are disposed, and a highest voltage is a second voltage and a lowest voltage is a fourth voltage at a scan electrode during a reset period. A first reset pulse, a second reset pulse having a highest voltage as a reference voltage, a fourth voltage, and a third reset pulse having a highest voltage as a seventh voltage and a lowest voltage as an eighth voltage.

In addition, the driver supplies a tenth voltage to the sustain electrode while the first reset pulse falls from the second voltage to the fourth voltage, and supplies the eleventh voltage to the sustain electrode while the second reset pulse is supplied, Supplying a twelfth voltage to the sustain electrode while the reset pulse falls from the seventh voltage to the eighth voltage.

In addition, the second voltage may include a voltage higher than the seventh voltage.

In addition, the fourth voltage, the sixth voltage, and the eighth voltage may include the same voltage.

In addition, the period during which the second reset pulse is supplied to the scan electrode may include a period shorter than the period during which the eleventh voltage is supplied to the sustain electrode.

In addition, the period during which the second reset pulse is supplied to the scan electrode may include 10 μm or more and 50 μm or less.

In addition, the tenth voltage or the eleventh voltage may include a voltage higher than the twelfth voltage.

In addition, the driving unit may include supplying the sustain electrode with a voltage gradually decreasing from the twelfth voltage to a thirteenth voltage, which is lower than the twelfth voltage, while the third reset pulse falls from the seventh voltage to the eighth voltage. have.

In addition, the second reset pulse includes a fifth voltage that is lower than the reference voltage and higher than the sixth voltage, and includes rapidly descending from the reference voltage to the fifth voltage and gradually descending from the fifth voltage to the sixth voltage. can do.

As described above, the plasma display apparatus according to an embodiment of the present invention has the effect of reducing the black brightness by continuously supplying the first reset pulse to the third reset pulse to the scan electrode during the reset period.

In addition, the plasma display apparatus according to an embodiment of the present invention has the effect of preventing the bright point and the flashing erroneous discharge by continuously supplying the first reset pulse to the third reset pulse to the scan electrode during the reset period.

1 is for explaining a plasma display device according to an embodiment of the present invention.

Referring to FIG. 1, a plasma display apparatus according to an exemplary embodiment includes a plasma display panel 100 including an electrode, a scan driver 200, a sustain driver 300, and a data driver 400.

The plasma display panel 100 is bonded to the front panel (not shown) and the rear panel (not shown) at regular intervals, and scan electrodes Y1 to Yn, sustain electrodes Z1 to Zn, and address electrodes X1 to Xm. ).

The scan driver 200 supplies reset pulses to the scan electrodes Y1 to Yn in the reset period so that wall charges are uniformly formed in the discharge cells. The scan driver 200 supplies a scan pulse for selecting a discharge cell to be discharged in the address period and a sustain pulse for generating sustain discharge in the discharge cell selected in the sustain period to the scan electrodes Y1 to Yn.

The sustain driver 300 supplies a sustain bias voltage to the sustain electrodes Z1 to Zn during a partial period and an address period of the reset period, and supplies a sustain pulse to the sustain electrodes Z1 to Zn during the sustain period.

In the data driver 400, inverse gamma correction and error diffusion are performed by an inverse gamma correction circuit, an error diffusion circuit, and the like, and then data mapped to each subfield is supplied by a subfield mapping circuit.

In addition, the data driver 400 supplies data pulses to the address electrodes X1 to Xm during the address period in correspondence with the scan electrodes Y1 to Yn in response to a data timing control signal from a timing controller (not shown).

The structure of the plasma display panel included in the plasma display apparatus is as follows.

2 illustrates a structure of a plasma display panel according to an exemplary embodiment of the present invention.

Referring to FIG. 2, a plasma display panel according to an embodiment of the present invention includes a front panel 110 including a front substrate 111 on which a scan electrode 112 and a sustain electrode 113 are formed, and the aforementioned scan electrode ( The rear panel 120 including the rear substrate 121 on which the address electrode 123 intersects the 112 and the sustain electrode 113 is formed is bonded to each other at a predetermined interval.

The scan electrode 112 and the sustain electrode 113 formed on the front substrate 111 are formed in parallel with each other to generate a discharge in the discharge cell and maintain the discharge of the discharge cell.

The scan electrode 112 and the sustain electrode 113 formed on the front substrate 111 need to consider light transmittance and electrical conductivity in order to emit light generated in the discharge cell to the outside and to secure driving efficiency. Accordingly, each of the scan electrode 112 and the sustain electrode 113 may be a bus electrode 112b or 113b made of metal such as silver and a transparent electrode 112a made of transparent indium tin oxide (ITO). , 113a).

An upper dielectric layer 114 may be formed on the front substrate 111 on which the scan electrode 112 and the sustain electrode 113 are formed to cover the scan electrode 112 and the sustain electrode 113.

The upper dielectric layer 114 limits the discharge current of the scan electrode 112 and the sustain electrode 113 and insulates the scan electrode 112 and the sustain electrode 113.

A protective layer 115 may be formed on the upper dielectric layer 114 to facilitate discharge conditions. The protective layer 115 may be made of magnesium oxide (MgO), which is a material having a high secondary electron emission coefficient.

On the other hand, the address electrode 123 formed on the rear substrate 121 is an electrode for supplying a data pulse to the discharge cell.

The lower dielectric layer 125 may be formed on the rear substrate 121 on which the address electrode 123 is formed to cover the address electrode 123.

In the upper portion of the lower dielectric layer 125, a discharge space, that is, a partition wall 122 for partitioning the discharge cells is formed. In the discharge cells partitioned by the partition wall 122, a phosphor layer 124 is formed that emits 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 according to the exemplary embodiment described above, when a driving pulse is supplied to the scan electrode 112, the sustain electrode 113, and the address electrode 123, the plasma display panel may be disposed in the discharge cell partitioned by the partition wall 122. Discharge occurs in the image to realize the image.

In FIG. 2, only the plasma display panel according to the exemplary embodiment is illustrated and described, but it is not limited thereto.

The operation of the plasma display device according to the exemplary embodiment of the present invention including the plasma display panel will be described with reference to FIGS. 3 and 4.

3 is a view for explaining a frame for implementing grayscale of an image in a method of driving a plasma display device according to an embodiment of the present invention, and FIG. 4 is a view of a method for driving a plasma display device according to an embodiment of the present invention. To explain the operation.

Referring to FIG. 3, a frame for implementing gray levels of an image in a plasma display device according to an embodiment of the present invention is divided into several subfields having different emission counts.

Although not shown, each subfield may further include a reset period for initializing all discharge cells, an address period for selecting discharge cells to be discharged, and a sustain period for implementing gray levels according to the number of discharges. Sustain Period).

For example, in the case of 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, for example, 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). , Gray scale weight of each subfield may be determined to increase at a ratio of 2, 3, 4, 5, 6, and 7). 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 according to an embodiment of the present invention uses a plurality of frames to display an image of 1 second. For example, 60 frames are used to display an image of 1 second.

In FIG. 3, only one frame is composed of eight subfields. However, the number of subfields constituting 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 plasma display apparatus that implements 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 can be expressed. When 10 subfields are included in a frame, gray levels of 2 ¹⁰ images can be realized.

In addition, in FIG. 3, the subfields are arranged in the order of increasing magnitude of the gray scale weight in one frame. Alternatively, the subfields may be arranged in the order of decreasing gray scale weight in one frame. Subfields may be randomly arranged irrespective of gray scale weights in order to prevent contour noise occurring when displaying.

Next, referring to FIG. 4, the operation of the plasma display apparatus according to an exemplary embodiment of the present invention is shown in any one sub-field of a plurality of subfields included in the same frame as in FIG. 3. Each of the scan driver 200, the sustain driver 300, and the data driver 400 described above with reference to FIG. 1 includes the scan electrode Y and the sustain electrode Z in at least one of a reset period, an address period, and a sustain period. And a driving pulse to the address electrode X.

The scan driver 200 may supply a reset rising pulse to the scan electrode Y during the reset period. Weak discharge occurs in the discharge cells of the entire screen by the reset rising pulse. The positive wall charges are accumulated on the address electrode X and the sustain electrode Z by the setup discharge, and the negative wall charges are accumulated on the scan electrode Y.

Thereafter, the scan driver 200 supplies a reset rising pulse to the scan electrode Y, and then starts to fall from the positive voltage lower than the maximum voltage of the reset rising pulse to fall to a specific voltage level below the reference voltage GND. A reset falling pulse can be supplied. As a result, a weak erase discharge is caused in the discharge cell, thereby sufficiently erasing wall charges excessively formed in the discharge cell. By this set down discharge, wall charges such that the address discharge can stably occur remain uniformly in the discharge cell.

In addition, the reset pulse including the reset rising pulse and the reset falling pulse described above includes the first reset pulse rp1 to the third reset pulse rp3.

The first reset pulse rp1 and the third reset pulse rp3 include a reset rising pulse and a reset falling pulse, and the second reset pulse rp2 includes a reset falling pulse. A detailed description thereof will be described with reference to FIG. 5.

The sustain driver 300 supplies the tenth voltage V10 and the eleventh voltage V11 to the sustain electrode Z during the reset period, and supplies the sustain bias voltage Vzb to the sustain electrode Z during the address period. . The tenth voltage V10, the eleventh voltage V11, and the sustain bias voltage Vzb may generate a voltage difference between the scan electrode Y and the sustain electrode Z to prevent erroneous discharge.

In addition, the scan driver 200 may supply a scan pulse Scan that falls from the scan bias voltage to the scan electrode Y in the address period.

In addition, the data driver 400 supplies the data pulse Dp to the address electrode X in response to the scan pulse Scan. As the voltage difference between the scan pulse Scan and the data pulse Dp and the wall voltage generated in the reset period are added, an address discharge is generated in the discharge cell to which the data pulse Dp is applied. In the discharge cells selected by the address discharge, wall charges are formed such that a discharge can occur when the sustain voltage Vs is applied.

In the sustain period after the address period, the scan driver 200 and the sustain driver 300 supply the sustain pulse SUS to the scan electrode Y and the sustain electrode Z. FIG. Accordingly, the discharge cell selected by the address discharge is sustained between the scan electrode Y and the sustain electrode Z every time the sustain pulse SUS is supplied while the wall voltage and the sustain pulse SUS are added to the discharge cell. Discharge occurs.

Such a driving method has been described according to an embodiment, and an erase period for removing the wall charge remaining after the sustain discharge after the sustain period may be further added, and the wall charges may be stably formed on the electrodes before the reset period. A pre reset period may be further added.

1 to 4, the scan driver 200 and the sustain driver 300 operate independently, but the scan driver 200 and the sustain driver 300 may operate in an integrated manner.

FIG. 5 illustrates an example in which the driving unit supplies a reset pulse during a reset period. Referring to FIG.

Referring to FIG. 5, in the reset period for initialization, the first to third reset pulses may be supplied to the scan electrodes. The first to third reset pulses may include a reset rising pulse and a reset falling pulse.

For example, after the first reset pulse rp1 rises rapidly from the reference voltage GND to the first voltage V1 with the scan electrode, the voltage gradually increases from the first voltage V1 to the second voltage V2. The first reset rising pulse may be supplied. Here, the reference voltage GND may be a ground level voltage GND.

After the first reset rising pulse, the first reset falling pulse in the opposite polarity direction to the first reset rising pulse may be supplied to the scan electrode Y.

Here, the first reset falling pulse may gradually fall from the peak voltage of the first reset rising pulse, that is, the third voltage V3 lower than the second voltage V2 to the fourth voltage V4.

Thereafter, the second reset pulse rp2 is suddenly lowered from the reference voltage to the fifth voltage V5 by the scan electrode Y, and then the voltage gradually decreases from the fifth voltage V5 to the sixth voltage V6. A second reset falling pulse can be supplied.

Thereafter, the third reset pulse rp3 may be supplied to the scan electrode Y with a third reset rising pulse gradually rising from the reference voltage to the seventh voltage V7.

After the third reset rising pulse, the third reset falling pulse in the opposite polarity direction to the third reset rising pulse may be supplied to the scan electrode Y.

Here, the third reset falling pulse may gradually fall from the peak voltage of the third reset rising pulse, that is, the reference voltage GND lower than the seventh voltage V7 to the eighth voltage V8.

As described above, by continuously supplying the first reset pulse rp1 to the third reset pulse rp3 during the reset period, two weak setups of weak discharge (weak discharge) occur in the discharge cell. . Wall charges can be stably accumulated in the discharge cells by the setup discharges generated twice during the reset period.

In addition, a set down discharge, which is a weak erase discharge, occurs three times in the discharge cell. By the three set-down discharges that occur three times, the wall charges enough to cause the address discharge to stably remain in the discharge cells remain more uniform.

That is, even if the setup up discharge and the set down discharge are generated by the first reset pulse rp1, the wall charge may remain unevenly in the discharge cell. Then, the wall charge that remains unevenly by supplying the second reset pulse rp2 may be maintained. May remain uniformly. In this way, by supplying the third reset pulse rp3 to the uniformly remaining wall charges, the wall charges such that the address discharges can be stably generated in the discharge cells can be more uniformly retained.

Accordingly, the present invention is different from the conventional invention in which the double reset pulse is supplied to the reset period of at least two subfields of one frame formed of a plurality of subfields in order to improve the bright spot and the flashing discharge. By continuously supplying the first reset pulse rp1 to the third reset pulse rp3 in the reset period of one subfield, not only the black brightness is reduced but also the address discharge is generated by the wall charge remaining more stably. Bright / Flashing Misleading margins can be improved.

As such, the first reset pulse rp1 to the third reset pulse rp3 supplied to the scan electrode during the reset period are preferably supplied to the low gradation subfield among the plurality of subfields, and in particular, among the plurality of subfields. It is preferable to be supplied in the reset period of the first subfield disposed first. That is, by supplying the first reset pulse rp1 to the third reset pulse rp3 in the reset period of the first subfield, the wall charge is uniformly and stably formed in the discharge cell, until all the frames are operated. This is because a stable discharge can be maintained.

In this case, the second voltage V2 that is the highest voltage of the first reset pulse rp1 may be higher than the seventh voltage V7 that is the highest voltage of the third reset pulse rp3. This is because the first reset pulse rp1 causes the wall charges to be accumulated unevenly in the discharge cell, but the third reset pulse rp3 accumulates evenly the wall charges uniformly accumulated in the discharge cell. This is to generate stable address discharge.

In addition, while the first reset falling pulse is supplied to the scan electrode Y, the tenth voltage V10 is supplied to the sustain electrode Z, and while the second reset pulse rp1 is supplied to the scan electrode Y. The eleventh voltage V11 may be supplied to the sustain electrode Z, and the twelfth voltage V12 may be supplied to the sustain electrode Z while the third reset falling pulse is supplied to the scan electrode Y. As such, the first voltage falling voltage V10, the voltage voltage V11, and the voltage voltage V12 are sustained while the first reset falling pulse to the third reset falling pulse are supplied to the scan electrode Y in the reset period. By supplying to the electrode Z, the voltage difference between the scan electrode Y and the sustain electrode Z can be generated more effectively. As a result, more stable address discharge can be generated by more uniformly retaining wall charges in the discharge cells.

The tenth voltage V10 and the eleventh voltage V11 supplied to the sustain electrode Z during the reset period are substantially the same as the sustain voltage Vs supplied to the scan electrode Y or the sustain electrode Z during the sustain period. It may be the same voltage. In this way, by using a voltage substantially the same as the sustain voltage Vs, the same voltage source as the sustain voltage source supplying the sustain voltage Vs can be used, so that the wall charge is more stably in the discharge cell without increasing the manufacturing cost. It can remain.

In addition, the twelfth voltage V12 may be substantially the same voltage as the sustain bias voltage Vzb supplied to the sustain electrode Z during the address period. In this manner, by using a voltage substantially equal to the sustain bias voltage Vzb, not only can the wall charge remain more stably in the discharge cell during the reset period, but also the scan electrode Y and the address electrode X during the address period. The address discharge occurring in the liver can be more effectively generated. Accordingly, the twelfth voltage V12 may be a voltage lower than the tenth voltage V10 or the eleventh voltage V11.

6 and 7 illustrate a second reset pulse according to an embodiment of the present invention.

In FIG. 6 and FIG. 7, portions already described with reference to FIGS. 1 to 5 will be omitted. Referring to FIG. 6, a fourth voltage V4, which is the lowest voltage of the first reset pulse rp1, a sixth voltage V6, which is the lowest voltage of the second reset pulse rp2, and a third reset are applied to the scan electrode during the reset period. The eighth voltage V8, which is the lowest voltage of the pulse rp3, may be substantially the same.

That is, the first voltage gradually descending from the third voltage V3 to the fourth voltage V4 is gradually lowered from the lowest voltage of the first reset pulse rp1 and the fifth voltage V5 to the sixth voltage V6. By supplying the lowest voltage of the second reset pulse rp2 and the lowest voltage of the third reset pulse rp3 gradually decreasing from the reference voltage GND to the eighth voltage V8 to the scan electrodes during the reset period substantially the same. The same voltage source can be used. As a result, not only the circuit configuration can be simplified, but also the manufacturing cost can be reduced.

Referring to FIG. 7, the period W1 during which the second reset pulse rp2 is supplied to the scan electrode Y may be shorter than the period W2 when the eleventh voltage V11 is supplied to the sustain electrode Z. Referring to FIG. That is, the second reset pulse rp2 may be supplied to the scan electrode Y such that the eleventh voltage V11 overlaps the period W2 when the eleventh voltage V11 is supplied to the sustain electrode Z.

In this manner, the scan electrode (B2) is made longer than the period W1 during which the second reset pulse rp2 is supplied to the scan electrode Y by supplying the period W2 to which the eleventh voltage V11 is supplied to the sustain electrode Z. Strong set-down discharges can be prevented between Y) and the sustain electrode Z. This is because the black luminance can be increased if the set down discharge is strongly generated in the reset period.

In addition, the second reset pulse rp2 gradually decreases from the fifth voltage V5 to the sixth voltage V6 in order to prevent strong set-down discharge between the scan electrode Y and the sustain electrode Z. can do. At this time, if the second reset pulse rp2 falls too gradually, the reset period may be long and the sustain period may be relatively short. As such, when the sustain period is shortened, it may be difficult to implement gradation of various images. Accordingly, the period during which the second reset pulse rp2 is supplied to the scan electrode Y may be 10 μm or more and 50 μm or less.

FIG. 8 is for explaining that the driving unit supplies a reset pulse during a reset period according to another embodiment of the present disclosure.

In FIG. 8, portions already described with reference to FIGS. 1 to 7 will be omitted. Referring to FIG. 8, while the third reset falling pulse of the third reset pulse rp3 is supplied to the scan electrode Y during the reset period, the twelfth voltage V12 to the thirteenth voltage are applied to the sustain electrode Z correspondingly. The voltage can be supplied gradually down to V13.

That is, while the third reset pulse rp3 is gradually lowered and supplied from the reference voltage GND to the eighth voltage V8 to the scan electrode Y, the sustain electrode Z is applied from the twelfth voltage V12 to the eighth voltage. By supplying a voltage that gradually drops to 13 voltages V13, the voltage difference between the scan electrode Y and the sustain electrode Z is reduced to generate a weak set down discharge between the scan electrode Y and the sustain electrode Z. Can be. Accordingly, the wall charges in the discharge cell can be more uniformly formed so that the wall charges can remain stably. Since the wall charges remain stable, the address discharge can stably occur during the address period.

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 following claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

1 is for explaining a plasma display device according to an embodiment of the present invention.

2 illustrates a structure of a plasma display panel according to an exemplary embodiment of the present invention.

FIG. 3 illustrates a frame for implementing grayscale of an image in a method of driving a plasma display device according to an embodiment of the present invention.

4 is a view illustrating an operation of a method of driving a plasma display device according to an embodiment of the present invention.

FIG. 5 illustrates an example in which the driving unit supplies a reset pulse during a reset period. Referring to FIG.

6 and 7 illustrate a second reset pulse according to an embodiment of the present invention.

FIG. 8 is for explaining that the driving unit supplies a reset pulse during a reset period according to another embodiment of the present disclosure.

Claims (9)

A plasma display panel on which scan electrodes and sustain electrodes are disposed; and The first reset pulse having the highest voltage as the second voltage and the lowest voltage as the fourth voltage, the second reset pulse having the highest voltage as the reference voltage and the lowest voltage as the fourth voltage, and the seventh voltage during the reset period. A driver configured to supply a third reset pulse having a lowest voltage of an eighth voltage; Plasma display device comprising a. According to claim 1, The driving unit supplies a tenth voltage to the sustain electrode while the first reset pulse falls from the second voltage to the fourth voltage, Supplying an eleventh voltage to the sustain electrode while the second reset pulse is supplied, And supplying a twelfth voltage to the sustain electrode while the third reset pulse falls from the seventh voltage to the eighth voltage. According to claim 1, And the second voltage is higher than the seventh voltage. According to claim 1, And the fourth voltage, the sixth voltage, and the eighth voltage are the same voltage. According to claim 1, And a period in which the second reset pulse is supplied to the scan electrode is shorter than a period in which the eleventh voltage is supplied to the sustain electrode. The method of claim 5, And a period in which the second reset pulse is supplied to the scan electrode is 10 µm or more and 50 µm or less. The method of claim 2, And the tenth voltage or the eleventh voltage is higher than the twelfth voltage. The method of claim 2, The driving unit supplies a voltage gradually decreasing from the twelfth voltage to a thirteenth voltage, which is lower than the twelfth voltage, to the sustain electrode while the third reset pulse falls from the seventh voltage to the eighth voltage. Plasma display device characterized in that. According to claim 1, The second reset pulse includes a fifth voltage that is lower than the reference voltage and higher than the sixth voltage, and rapidly drops from the reference voltage to the fifth voltage, and gradually increases from the fifth voltage to the sixth voltage. The plasma display device, characterized in that descending.

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