KR20080040472A - Plasma display apparatus - Google Patents

Abstract

A plasma display apparatus is provided to enhance driving efficiency by supplying ramp-down and ramp-up signals to third electrodes during a reset period. A plasma display apparatus includes a plasma display panel(100) and a driver(110). The plasma display panel includes first and second electrodes which are formed in parallel with each other, and third electrodes across the first and second electrodes. The driver supplies a ramp-down signal whose voltage is gradually decreased, and a ramp-up signal whose voltage is gradually increased, to third electrodes during a reset period of image frames. The driver supplies the ramp-up signal after the supplement of the ramp-down signal to the third electrodes.

Description

Plasma Display Apparatus {Plasma Display Apparatus}

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

2 is a view for explaining an example of the structure of a plasma display panel that can be included in the plasma display device according to an embodiment of the present invention.

3 is a view for explaining an example where at least one of the first electrode or the second electrode is a plurality of layers;

4 is a view for explaining an example in the case where at least one of the first electrode or the second electrode is a single layer;

FIG. 5 is a diagram for describing an image frame for implementing gray levels of an image in a plasma display device according to an embodiment of the present invention. FIG.

6 is a view for explaining an example of the operation of the plasma display device according to an embodiment of the present invention.

7A to 7B are views for explaining the reason why the falling ramp signal and the rising ramp signal are supplied to the third electrode in the reset period.

8 is a diagram for explaining another example of the second signal or the third signal.

<Description of the numbers for the main parts of the drawings>

100: plasma display panel 110: driver

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

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

In general, a phosphor layer is formed in a discharge cell (Cell) partitioned by a partition, and a plurality of electrodes are formed in the plasma display panel.

The driver supplies a driving signal to the discharge cell through the electrode.

Then, the discharge is generated by the drive signal supplied in the discharge cell. Here, when discharged by a drive signal in the discharge cell, the discharge gas filled in the discharge cell generates light such as ultraviolet rays, and the light such as ultraviolet light emits phosphors formed in the discharge cell. Generates visible light The visible light displays an image on the screen of the plasma display panel.

One embodiment of the present invention is to provide a plasma display device having improved driving efficiency by supplying a ramp-down signal and a ramp-up signal to a third electrode in a reset period.

Plasma display device according to an embodiment of the present invention for achieving the above object includes a first electrode and a second electrode parallel to each other, and a plasma display panel including a third electrode crossing the first electrode and the second electrode And a driving unit supplying the third electrode with a ramp-down signal in which the voltage gradually falls in the reset period of the image frame and a ramp-up signal in which the voltage gradually rises. Include.

In addition, the driver supplies the rising ramp signal after the falling ramp signal is supplied to the third electrode in the reset period.

In addition, the driver supplies the data signal to the third electrode in the address period after the reset period, and the magnitude of the voltage of the rising ramp signal is less than or equal to the magnitude of the voltage of the data signal.

The driver supplies the first signal to the first electrode in the reset period, and the scan signal to the first electrode in the address period after the reset period.

Further, the first signal is a signal that substantially maintains the first voltage, and the magnitude of the first voltage is substantially equal to the magnitude of the voltage of the sustain signal supplied in the sustain period after the address period.

The driving unit supplies a second signal to the second electrode in the reset period, and supplies a third signal to the second electrode in the address period after the reset period.

Further, the second signal is a signal that substantially holds the second voltage, the third signal is a signal that substantially holds the third voltage, and the magnitude of the second voltage is greater than or equal to the magnitude of the third voltage.

Further, the magnitude of the second voltage is substantially the same as the magnitude of the voltage of the sustain signal supplied in the sustain period after the address period.

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

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

1, a plasma display apparatus according to an embodiment of the present invention includes a plasma display panel 100 and a driver 110.

The plasma display panel 100 includes first electrodes Y1 to Yn and second electrodes Z1 to Zn that are parallel to each other, and further includes third electrodes X1 to Xm that cross the first and second electrodes. Include.

The driver 110 may output a ramp-up signal in which the voltage gradually rises in the reset period of the image frame and a ramp-down signal in which the voltage gradually falls in the plasma display panel 100. Supply to the third electrode.

Here, in FIG. 1, only the case in which the driving unit 110 is formed as one board is illustrated, but in the present invention, the driving unit 110 is divided into a plurality of boards according to electrodes formed on the plasma display panel 100. It is also possible to lose.

For example, the driver 110 may include a first driver (not shown) for driving the first electrode of the plasma display panel 100, a second driver for driving the second electrode, and a third for driving the third electrode. It can be divided into a driving unit (not shown).

The driving unit 110 of the plasma display device of the present invention will be more clearly described later.

Next, FIG. 2 is a view for explaining an example of a structure of a plasma display panel that may be included in a plasma display device according to an embodiment of the present invention.

Referring to FIG. 2, a plasma display panel that may be included in a plasma display apparatus according to an exemplary embodiment of the present invention has a front substrate 201 in which first electrodes 202 and Y and second electrodes 203 and Z are parallel to each other. ) And the back substrate 111 on which the third electrodes 213 and X intersecting the first electrodes 202 and Y and the second electrodes 203 and Z are formed.

The first electrodes 202 and Y and the second electrodes 203 and Z may generate a discharge in a discharge space, that is, a discharge cell, and maintain the discharge of the discharge cell.

The front substrate 201 in which the first electrodes 202 and Y and the second electrodes 203 and Z are formed has a dielectric layer, for example, to cover the first electrodes 202 and Y and the second electrodes 203 and Z. Upper dielectric layer 204 may be formed.

This upper dielectric layer 204 limits the discharge current of the first electrode 202, Y and the second electrode 203, Z and between the first electrode 202, Y and the second electrode 203, Z. Can be insulated.

A protective layer 205 may be formed on the front substrate 201 in which the upper dielectric layer 204 is formed to facilitate discharge conditions. The protective layer 205 may include magnesium oxide (MgO) material. The protective layer 205 may be formed, for example, by depositing a magnesium oxide (MgO) material over the upper dielectric layer 204.

Meanwhile, electrodes, for example, third electrodes 213 and X are formed on the rear substrate 211, and third electrodes 213 and X are formed on the rear substrate 211 on which the third electrodes 213 and X are formed. A dielectric layer, such as lower dielectric layer 215, may be formed to cover the gap.

The lower dielectric layer 215 may insulate the third electrodes 213 and X.

On top of the lower dielectric layer 215, a partition 112, such as a stripe type, a well type, a delta type, a honeycomb type, for partitioning a discharge cell, that is, a discharge cell, is formed. Can be formed. Accordingly, red (R), green (G), and blue (B) discharge cells may be formed between the front substrate 101 and the rear substrate 111.

In addition to the red (R), green (G), and blue (B) discharge cells, it is also possible to further form a white (W) or yellow (Yellow: Y) discharge cell.

Meanwhile, although the widths of the red (R), green (G), and blue (B) discharge cells in the plasma display panel that can be applied to the plasma display device according to an embodiment of the present invention may be substantially the same, red ( The width of at least one of the R), green (G), and blue (B) discharge cells may be different from that of the other discharge cells.

For example, the width of the red (R) discharge cell is the smallest, and the width of the green (G) and blue (B) discharge cells can be made larger than the width of the red (R) discharge cell.

Here, the width of the green (G) discharge cell may be substantially the same as or different from the width of the blue (B) discharge cell.

As such, when formed, the width of the phosphor layer 214 to be described later formed in the discharge cell is also changed in relation to the width of the discharge cell. For example, the width of the blue (B) phosphor layer formed in the blue (B) discharge cell is wider than the width of the red (R) phosphor layer formed in the red (R) discharge cell, and at the same time in the green (G) discharge cell. The width of the green (G) phosphor layer formed may be wider than the width of the red (R) phosphor layer formed in the red (R) discharge cell.

Then, color temperature characteristics of the image to be implemented may be improved.

In addition, the plasma display panel that may be applied to the plasma display apparatus according to the exemplary embodiment of the present invention may have not only the structure of the partition wall 212 illustrated in FIG. 2, but also the structure of the partition wall having various shapes. For example, the partition 212 includes a first partition 212b and a second partition 212a, where the height of the first partition 212b and the height of the second partition 212a are different from each other. At least one of the first barrier rib 212b and the second barrier rib 212a, and a channel type barrier rib structure having a channel usable as an exhaust passage, at least one of the first barrier rib 212b and the second barrier rib 212a. Grooved partition wall structure having a groove formed in the groove will be possible.

Here, in the case of the differential partition structure, the height of the first partition 212b of the first partition 212b or the second partition 212a may be lower than the height of the second partition 212a. In addition, in the case of the channel-type partition wall structure, a channel may be formed in the first partition wall 212b.

On the other hand, in the plasma display panel applicable to the plasma display device according to an embodiment of the present invention, although the red (R), green (G), and blue (B) discharge cells are illustrated and described as being arranged on the same line, It may be possible to arrange them in other shapes. For example, a delta type arrangement in which red (R), green (G) and blue (B) discharge cells are arranged in a triangular shape may be possible. In addition, the shape of the discharge cell may also be a variety of polygonal shapes, such as pentagonal, hexagonal, as well as rectangular.

In addition, in FIG. 2, only the case where the barrier rib 212 is formed on the rear substrate 211 is illustrated, but the barrier rib 212 may be formed on at least one of the front substrate 201 and the rear substrate 211.

A predetermined discharge gas may be filled in the discharge cell partitioned by the partition wall 212.

In addition, a phosphor layer 214 that emits visible light for image display may be formed in the discharge cells partitioned by the partition wall 212. For example, red (R), green (G), and blue (B) phosphor layers may be formed.

In addition to the red (R), green (G), and blue (B) phosphors, it is also possible to further form a white (W) and / or yellow (Y) phosphor layer.

In addition, the thickness of the phosphor layer 214 in at least one of the red (R), green (G), and blue (B) discharge cells may be different from other discharge cells. For example, the thickness of the phosphor layer of the green (G) discharge cell, ie the phosphor layer in the green (G) phosphor layer or the blue (B) discharge cell, ie the blue (B) phosphor layer, is It may be thicker than the thickness of the phosphor layer, ie the red (R) phosphor layer. Here, the thickness of the green (G) phosphor layer may be substantially the same as or different from the thickness t3 of the blue (B) phosphor layer.

Meanwhile, only the example of the plasma display panel which can be applied to the plasma display apparatus according to the exemplary embodiment of the present invention is shown and described, and the present invention is not limited to the plasma display panel having the above-described structure. . For example, the description hereinabove illustrates only the case where the top dielectric layer at number 204 and the bottom dielectric layer at number 215 are each one layer, but one or more of these top dielectric layers and bottom dielectric layers are a plurality of layers. It can also be layered.

In addition, another black layer (not shown) may be further formed on the top of the partition 212 to prevent reflection of the external light due to the partition 212.

In addition, another black layer (not shown) may be further formed at a specific position on the front substrate 201 corresponding to the partition 212.

In addition, the width or thickness of the third electrode 213 formed on the rear substrate 211 may be substantially constant, but the width or thickness inside the discharge cell may be different from the width or thickness outside the discharge cell. will be. For example, the width or thickness inside the discharge cell may be wider or thicker than that outside the discharge cell.

Next, FIG. 3 is a figure for explaining an example in the case where at least one of a 1st electrode or a 2nd electrode is a some layer.

Referring to FIG. 3, at least one of the first electrode 202 or the second electrode 203 may be formed of a plurality of layers, for example, two layers.

For example, in consideration of light transmittance and electrical conductivity, at least one of the first electrode 202 or the second electrode 203 is made of silver (silver) to emit light generated in the discharge cell to the outside and to secure driving efficiency. Bus electrodes 202b and 203b including a substantially opaque material such as Ag) and transparent electrodes 202a and 203a including a transparent material such as transparent indium tin oxide (ITO). .

As such, when the first electrode 202 and the second electrode 203 include the transparent electrodes 202a and 203a, visible light generated in the discharge cell can be effectively emitted when emitted to the outside of the plasma display panel. .

In addition, when the first electrode 202 and the second electrode 203 include the bus electrodes 202b and 203b, the first electrode 202 and the second electrode 203 include only the transparent electrodes 202a and 203a. In this case, the driving efficiency can be reduced because the electrical conductivity of the transparent electrodes 202a and 203a is relatively low, and it is possible to compensate for the low electrical conductivity of the transparent electrodes 202a and 203a which can cause such a reduction in the driving efficiency. Can be.

Thus, when the first electrode 202 and the second electrode 203 include the bus electrodes 202b and 203b, the transparent electrode 202a to prevent reflection of external light by the bus electrodes 202b and 203b. A black layer 320 and 321 may be further provided between the first and second 203a and the bus electrodes 202b and 203b.

Next, FIG. 4 is a figure for explaining an example in the case where at least one of a 1st electrode or a 2nd electrode is a single layer.

Referring to FIG. 4, the first electrodes 202 and Y and the second electrodes 203 and Z are one layer. For example, the first electrodes 202 and Y and the second electrodes 203 and Z may be electrodes (ITO-Less) in which the transparent electrode of numeral 202a or 203a is omitted in FIG. 3.

At least one of the first electrode 202 and Y or the second electrode 203 and Z may include a substantially opaque electrically conductive metal material. For example, it may include a material having excellent electrical conductivity such as silver (Ag), copper (Cu), aluminum (Al), and the like, and a material having a lower cost than a transparent material such as indium tin oxide (ITO). .

In addition, at least one of the first electrode 202 and the second electrode 203 and Z may be darker in color than the upper dielectric layer of FIG. 2.

As such, when at least one of the first electrode 202 and the second electrode 203 and Z is a single layer, the manufacturing process is simpler than in the case of FIG. 3. For example, in the case of FIG. 3, the bus electrodes 202b and 203b are formed after the transparent electrodes 202a and 203a are formed in the process of forming the first electrodes 202 and Y and the second electrodes 203 and Z. 4 again, the first electrode 202 and Y and the second electrode 203 and Z can be formed in one process because the single layer structure of FIG.

In addition, as shown in FIG. 4, when the first electrodes 202 and Y and the second electrodes 203 and Z are formed in a single layer, the manufacturing process is simplified and relatively expensive indium-tin-oxide (ITO) or the like. Since it is not necessary to use a transparent material of the manufacturing cost can be reduced.

Meanwhile, discoloration of the front substrate 201 is prevented between the first electrodes 202 and Y and the second electrodes 203 and Z and the front substrate 201, and the first electrode 202 or Y or the second electrode ( Black layers 400a and 400b having a darker color than at least one of 203 and Z) may be further provided. That is, when the front substrate 201 and the first electrode 202, Y or the second electrode 203, Z are in direct contact, the first electrode 202, Y or the second electrode 203, Z is directly in contact with each other. Migration phenomenon may occur in which a predetermined area of the front substrate 201 that is in contact with the yellow color is changed. The black layers 400a and 400b may prevent the migration of the front substrate 201 by preventing the migration phenomenon. It can be.

The black layers 400a and 400b may include a black material having a substantially dark color, for example, ruthenium (Ru).

As such, when the black layers 400a and 400b are provided between the front substrate 201 and the first electrodes 202 and Y and the second electrodes 203 and Z, the first electrodes 202 and Y may be provided. Even if the second electrodes 203 and Z are made of a material having high reflectance, generation of reflected light can be prevented.

As such, the structure of the plasma display panel which may be included in the plasma display apparatus according to the exemplary embodiment may be variously changed.

Next, FIG. 5 is a diagram for describing an image frame for implementing gradation of an image in a plasma display device according to an embodiment of the present invention.

Referring to FIG. 5, an image frame for implementing gray levels of an image in a plasma display device according to an embodiment of the present invention may be divided into a plurality of subfields having different emission counts.

Although not shown, one or more subfields among the plurality of subfields may be grayed out according to a reset period for initializing discharge cells, an address period for selecting discharge cells to be discharged, and the number of discharges. It can be divided into the sustain period to implement.

For example, when an image is to be displayed with 256 gray scales, for example, one image frame is divided into eight subfields SF1 to SF8 as shown in FIG. 5, and each of the eight subfields SF1 to SF8, respectively. Can be subdivided into a reset period, an address period and a sustain period.

The gray scale weight of the corresponding subfield may be set by adjusting the number of the sustain signals 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 described above, the number of sustain signals supplied in the sustain period of each subfield is adjusted according to the gray scale weight in each subfield, thereby implementing gray levels of various images.

A plasma display panel according to an embodiment of the present invention uses a plurality of image frames to implement an image, for example, to display an image of 1 second. For example, 60 image frames are used to display an image of 1 second. In this case, the length T of one image frame may be 1/60 second, that is, 16.67 ms.

In FIG. 5, only one image frame is composed of eight subfields. However, the number of subfields constituting one image frame may be variously changed. For example, one video frame may be configured with 12 subfields from the first subfield to the twelfth subfield, or one video frame may be configured with 10 subfields.

In addition, in FIG. 5, subfields are arranged in increasing order of gray scale weight in one image frame. Alternatively, subfields may be arranged in order of decreasing gray scale weight in one image frame. Alternatively, subfields may be arranged regardless of the gray scale weight.

The operation of the plasma display apparatus according to an embodiment of the present invention in the subfield of the image frame described above will be described with reference to FIGS. 6, 7A, 7B, 8, and 9 as follows.

6 is a view for explaining an example of the operation of the plasma display device according to an embodiment of the present invention.

7A to 7B are diagrams for explaining the reason why the falling ramp signal and the rising ramp signal are supplied to the third electrode in the reset period.

8 is a figure for explaining another example of a 2nd signal or a 3rd signal.

First, referring to FIG. 6, an example of an operation of the plasma display apparatus according to an exemplary embodiment of the present invention in at least one subfield among a plurality of subfields included in the image frame as shown in FIG. 5 is shown. . It will be appreciated that the driving signal to be described below is supplied by the driving unit 110 of FIG. 1.

First, in a set-up period of a reset period for initialization, a ramp-down signal in which the voltage is gradually lowered is supplied to the third electrode. This falling ramp signal may have a gradual drop in voltage to V _SD .

In addition, the first signal may be supplied to the first electrode while the falling ramp signal is supplied to the third electrode in the setup period. This first signal is a signal that substantially maintains the first voltage V1. In addition, the magnitude of the first signal, that is, the magnitude of the first voltage V1 may be substantially the same as the magnitude of the voltage of the sustain signal supplied in the sustain period after the address period.

In this setup period, a weak dark discharge, that is, setup discharge, occurs between the first electrode and the third electrode in the discharge cell by the falling ramp signal. By this setup discharge, some wall charges can be accumulated in the discharge cells.

In the set-down period after the set-up period, after the falling ramp signal, a ramp-up signal in the opposite polarity direction to that of the falling ramp signal is supplied to the third electrode. The rising ramp signal may gradually increase the voltage up to V _ST .

The magnitude (VV _ST ) of the voltage of the rising ramp signal may be smaller than or equal to the magnitude (VD) of the data signal supplied to the third electrode in the address period after the reset period.

In this set down period, a weak erase discharge, that is, a set down discharge, occurs in the discharge cell. By this set-down discharge, wall charges such that address discharge can be stably generated in the discharge cells remain uniformly.

In the setup period and the set-down period described above, the second signal is supplied to the second electrode in order to suppress the occurrence of erroneous discharge between the first electrode and the second electrode or the first electrode and the third electrode. The second signal is a signal for substantially maintaining the second voltage V2, and the magnitude of the second voltage Vs is the magnitude of the voltage of the sustain signal supplied in the sustain period after the address period Vs. Is substantially the same as

As described above, the reason for supplying the falling ramp signal and the rising ramp signal to the third electrode in the reset period will be described with reference to FIGS. 7A to 7B.

First, referring to FIG. 7A, the interval W1 between the first electrode 202 and the second electrode 203 formed on the front substrate 201 may be defined by the first electrode 202, the second electrode 203, and the third electrode. It is relatively larger than the spacing W2 between the electrodes 213. In addition, when the plasma display panel is large, the distance W1 between the first electrode 202 and the second electrode 203 formed on the front substrate 201 also increases.

Accordingly, a phenomenon in which discharge generated between the first electrode 202 and the second electrode 203 is attracted toward the third electrode 213 may occur.

Meanwhile, suppose that the rising ramp signal and the falling ramp signal are supplied to the first electrode in the reset period in the reset period as shown in FIG. 7B.

In the case of FIG. 7B, a discharge occurs between the first electrode and the second electrode by the rising ramp signal and the falling ramp signal supplied to the first electrode in the reset period, and initialization may be performed by the discharge.

Meanwhile, in the case of FIG. 7B, the discharge generated between the first electrode and the second electrode is attracted to the third electrode, so that initialization may not be smoothly performed in the reset period. As a result, the discharge in the address period and the sustain period after the reset period becomes unstable, and as a result, the driving efficiency may be lowered and the image quality of the image to be implemented may be deteriorated.

In addition, in the case of FIG. 7B, the amount of wall charges accumulated on the third electrode to which the data signal is supplied in the address period may not be sufficient. As a result, the address discharge may become unstable.

On the other hand, when the initialization is performed by supplying the falling ramp signal and the rising ramp signal to the third electrode in the reset period as shown in FIG. Since the discharge for initialization occurs between the electrode and the third electrode, it is possible to generate a discharge for sufficiently strong initialization even with a relatively small voltage. Accordingly, the driving efficiency can be improved. In addition, in the case of FIG. 6, a sufficient amount of wall charges are accumulated on the third electrode in the reset period, and thus address discharge can be stabilized.

In the address period after the reset period, a scan reference signal that substantially maintains a voltage lower than the first voltage V1 of the first signal may be supplied to the first electrode.

In addition, a scan signal falling from the scan reference signal may be supplied to the first electrode.

For example, the first scan signal Scan 1 is supplied to the first first electrode of the plurality of first electrodes, and then the second scan signal Scan 2 is supplied to the second first electrode, and the nth The n th scan signal Scan n may be supplied to the first electrode.

Meanwhile, the width of the scan signal may vary in units of subfields. That is, the width of the scan signal in at least one subfield may be different from the width of the scan signal in another subfield. For example, the width of the scan signal in the subfield located later in time may be smaller than the width of the scan signal in the preceding subfield. In addition, the reduction of the scan signal width according to the arrangement order of the subfields may be made gradually, such as 2.6 ms (microseconds), 2.3 ms (microseconds), 2.1 ms (microseconds), 1.9 ms (microseconds), or 2.6. ㎲ (microseconds), 2.3 ㎲ (microseconds), 2.3 ㎲ (microseconds), 2.1 ㎲ (microseconds) ... 1.9 ㎲ (microseconds), 1.9 ㎲ (microseconds), etc. will be.

As such, when the scan signal is supplied to the first electrode, a data signal rising by ㅿ Vd may be supplied to the third electrode to correspond to the scan signal.

As the scan signal and the data signal are supplied, an address discharge may be generated in the discharge cell to which the data signal is supplied while the voltage difference between the scan signal and the data signal and the wall voltage generated by the wall charges generated in the reset period are added. have.

Here, the third signal may be supplied to the second electrode to prevent the address discharge from becoming unstable due to interference of the second electrode in the address period. Here, the third signal is a signal for substantially maintaining the third voltage V3.

The third signal and the second signal will be described with reference to FIG. 8 as follows.

Referring to FIG. 8, in FIG. 6, although the second voltage V2 of the second signal and the third voltage V3 of the third signal are shown to be substantially the same, the third voltage V3 of the third signal may not be the same. It may be smaller than the second voltage V2 of the second signal.

In this way, the address discharge can be sufficiently stabilized.

Thereafter, in the sustain period for displaying an image, a sustain signal may be supplied to at least one of the first electrode and the second electrode. For example, a sustain signal may be alternately supplied to the first electrode and the second electrode.

When such a sustain signal is supplied, the discharge cell selected by the address discharge has a sustain discharge, i.e., between the first electrode and the second electrode when the sustain signal is supplied while the wall voltage in the discharge cell and the voltage Vs of the sustain signal are added. Display discharge may occur. Accordingly, an image may be implemented.

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 apparatus according to the exemplary embodiment of the present invention has the effect of stabilizing the discharge and improving the driving efficiency by supplying the falling ramp signal and the rising ramp signal to the third electrode in the reset period.

Claims (8)

A plasma display panel including a first electrode and a second electrode parallel to each other, and a third electrode intersecting the first electrode and the second electrode; The driver supplying a ramp-down signal in which the voltage gradually falls and a ramp-up signal in which the voltage gradually increases in the reset period of the image frame to the third electrode. Plasma display device comprising a. The method of claim 1, The driving unit And supplying the rising ramp signal after the falling ramp signal is supplied to the third electrode in the reset period. The method of claim 1, The driving unit A data signal is supplied to the third electrode in the address period after the reset period, And the magnitude of the voltage of the rising ramp signal is less than or equal to the magnitude of the voltage of the data signal. The method of claim 1, The driving unit And a first signal is supplied to the first electrode in the reset period, and a scan signal is supplied to the first electrode in the address period after the reset period. The method of claim 4, wherein And the first signal is a signal for substantially maintaining a first voltage, and the magnitude of the first voltage is substantially the same as the magnitude of the voltage of the sustain signal supplied in the sustain period after the address period. The method of claim 1, The driving unit And a second signal to the second electrode in the reset period, and a third signal to the second electrode in the address period after the reset period. The method of claim 6, The second signal is a signal for substantially maintaining the second voltage, the third signal is a signal for substantially maintaining the third voltage, and the magnitude of the second voltage is greater than or equal to the magnitude of the third voltage. Plasma display device. The method of claim 6, And the magnitude of the second voltage is substantially the same as the magnitude of the voltage of the sustain signal supplied in the sustain period after the address period.

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