KR20090043311A - Plasma display apparatus - Google Patents

Abstract

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

According to an embodiment of the present invention, a plasma display apparatus includes a plasma display panel on which scan electrodes and sustain electrodes are disposed, and a driver supplying driving signals to the scan electrodes and the sustain electrodes, wherein the driver includes a plurality of subfields of the frame. Supplying a reset signal to the scan electrode including a first rising ramp signal rising from a first voltage to a second voltage and a second rising ramp signal rising from a second voltage to a third voltage during a reset period for initialization; And a flat-period in which a constant voltage is maintained between the first rising ramp signal and the second rising ramp signal.

Plasma display device according to an embodiment of the present invention includes the flat period in the reset signal, it is effective to uniformly distribute the wall charge to prevent the mis-discharge and to ensure the stable discharge.

Description

Plasma Display Apparatus {Plasma Display Apparatus}

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 the plasma display panel, a phosphor layer is formed in a discharge cell divided by a partition, and a plurality of electrodes are formed.

When the drive signal is supplied to the electrode of the plasma display panel, 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 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.

One embodiment of the present invention is to provide a plasma display device having improved driving signal and improved discharge efficiency by improving a reset signal.

According to an embodiment of the present invention, a plasma display apparatus includes a plasma display panel on which scan electrodes and sustain electrodes are disposed, and a driver supplying driving signals to the scan electrodes and the sustain electrodes, wherein the driver includes a plurality of subfields of the frame. Supplying a reset signal to the scan electrode including a first rising ramp signal rising from a first voltage to a second voltage and a second rising ramp signal rising from a second voltage to a third voltage during a reset period for initialization; And a flat-period in which a constant voltage is maintained between the first rising ramp signal and the second rising ramp signal.

In addition, the length of the flat period is characterized in that more than 2㎛ 300㎛.

In addition, the length of the flat period is characterized in that the 10㎛ not more than 100㎛.

In addition, the first voltage is characterized in that the ground (GND) voltage.

In addition, the second voltage is characterized in that the sustain voltage (Vs).

The reset signal may be supplied to at least one of the plurality of subfields.

The driving unit may supply a first signal, which is a negative signal, to the scan electrode and a second signal, which is a positive signal, to the sustain electrode during the pre-reset period before the reset period.

In addition, the plasma display panel is filled with a discharge gas containing xenon (Xe), the xenon content is characterized in that 10% or more and 20% or less.

In addition, the content of xenon is characterized in that 12% or more and 15% or less.

Plasma display device according to an embodiment of the present invention includes the flat period in the reset signal, it is effective to uniformly distribute the wall charge to prevent the mis-discharge and to ensure the stable discharge.

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

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

Referring to FIG. 1, a plasma display apparatus according to an embodiment of the present invention includes a plasma display panel 100 for implementing an image using plasma discharge and a driver 110.

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

For example, the plasma display apparatus of the present invention includes a scan driver (not shown) for driving the scan electrode (Y), a sustain driver (not shown) for driving the sustain electrode (Z), and an address electrode (X). It can be divided into a data driver (not shown) for driving.

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

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

2, the plasma display panel 200 according to an embodiment of the present invention includes a front substrate 201 and a front substrate 20 on which scan electrodes 202 and Y and sustain electrodes 203 and Z which are parallel to each other are disposed. A rear substrate 211 on which the address electrode 213 intersects with the scan electrode 202 and the sustain electrode 203 is disposed opposite to 201 may be bonded to each other by a seal layer (not shown). have.

An upper dielectric layer 204 filling the scan electrode 202 and the sustain electrode 203 is disposed on the front substrate 201 where the scan electrode 202 and the sustain electrode 203 are disposed.

The upper dielectric layer 204 limits the discharge current of the scan electrode 202 and the sustain electrode 203 and can insulate the scan electrode 202 and the sustain electrode 203.

A protective layer 205 may be disposed over the upper dielectric layer 204 to facilitate discharge conditions. The protective layer 205 may include a material having a high secondary electron emission coefficient such as magnesium oxide (MgO).

In addition, an electrode, for example, an address electrode 213 is disposed on the rear substrate 211, and an address electrode 213 is covered on the rear substrate 211 on which the address electrode 213 is disposed to insulate the address electrode 213. A dielectric layer, such as lower dielectric layer 215, may be disposed.

Discharge spaces, that is, partition 112 partitioning the discharge cells, that is, a partition type (Wipe Type, Well Type, Delta Type, Honeycomb type, etc.) may be disposed on the lower dielectric layer 215. Can be. The barrier rib 212 may be provided with a red (R), green (G), and blue (B) discharge cell between the front substrate 201 and the rear substrate 211. In addition, in addition to the red (R), green (G), and blue (B) discharge cells, white (W) or yellow (Yellow: Y) discharge cells may be further provided.

In the discharge cells partitioned by the partition walls 212, a discharge gas such as xenon (Xe), neon (Ne), or the like may be filled.

In addition, a phosphor layer 214 that emits visible light for image display may be disposed in the discharge cell partitioned by the partition wall 212. For example, a first phosphor layer emitting red (R) light, a second phosphor layer emitting blue (B) light, and a third phosphor layer emitting green (G) light are disposed. Can be. In addition to the red (R), green (G), and blue (B) light, it is also possible to further arrange other phosphor layers emitting white (W) light or yellow (Yellow: Y) light.

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, a phosphor layer of a green (G) discharge cell, that is, a phosphor layer in a third phosphor layer or a blue (B) discharge cell, that is, a thickness of a second phosphor layer, may have a phosphor layer in a red (R) discharge cell. That is, it may be thicker than the thickness of the first phosphor layer. Here, the thickness of the third phosphor layer may be substantially the same or different from the thickness of the second phosphor layer.

In addition, in the plasma display panel 200 according to an embodiment of the present invention, the widths of the red (R), green (G), and blue (B) discharge cells may be substantially the same, but the red (R) and green (G) colors may be substantially the same. And at least one of the blue (B) discharge cells may be different from the widths 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.

The width of the phosphor layer 214 disposed in the discharge cell is then changed in relation to the width of the discharge cell. For example, the width of the second phosphor layer disposed in the blue (B) discharge cell is wider than the width of the first phosphor layer disposed in the red (R) discharge cell, and the third disposed in the green (G) discharge cell. The width of the phosphor layer may be wider than the width of the first phosphor layer disposed in the red (R) discharge cell, thereby improving the color temperature characteristics of the image implemented.

In addition, the plasma display panel 200 according to an embodiment of the present invention may have not only the structure of the partition 212 illustrated in FIG. 2 but also the structure of the partition 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. Etc. are possible.

In the case of such a differential partition structure, the height of the first partition 212b among the first partition 212b or the second partition 212a may be lower than the height of the second partition 212a.

In addition, although the red (R), green (G), and blue (B) discharge cells are each shown and described as being arranged on the same line in FIG. 2, they may be arranged 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 is also possible. In addition, the shape of the discharge cell is not only rectangular but also various polygonal shapes such as pentagon and hexagon.

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

In the above description, only one example of the plasma display panel 200 according to the exemplary embodiment of the present invention is illustrated and described, and the present invention is not limited to the plasma display panel 200 having the above-described structure. For example, the above description only shows the case where the lower dielectric layer 215 and the upper dielectric layer 204 are one layer, but at least one of the lower dielectric layer or the upper dielectric layer is not composed of a plurality of layers. It is also possible.

In addition, although the width and thickness of the address electrode 213 disposed on the rear substrate 211 may be substantially constant, the width or thickness inside the discharge cell may be different from the width or thickness outside the discharge cell. For example, the width or thickness inside the discharge cell may be wider or thicker than that outside the discharge cell.

FIG. 3 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.

Referring to FIG. 3, 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. 3, 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.

The plasma display apparatus according to an exemplary embodiment 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. 3, 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. 3, subfields are arranged in the order of increasing magnitude 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.

4 is a view for explaining an example of the operation of the plasma display device according to an embodiment of the present invention. 4 is a view illustrating an example of a method of operating a plasma display panel according to an embodiment of the present invention. The present invention is not limited to FIG. 4, and the plasma display panel according to an embodiment of the present invention is described. The method of operation may be variously changed.

Referring to FIG. 4, in the set-up period of the reset period for initialization, the driving unit applies a ramp-up signal to the scan electrode Y. That is, a signal in which the voltage gradually rises is applied to the scan electrode (Y).

Here, the rising ramp signal is a first rising ramp signal that gradually rises from the first voltage V1 to the second voltage V2, and a rising ramp signal that gradually rises from the second voltage V2 to the third voltage V3. It may include a two rising ramp signal.

In addition, a flat period may be included between the first rising ramp signal and the second rising ramp signal.

In this setup period, a weak dark discharge, that is, setup discharge, occurs in the discharge cell by the rising ramp signal. By this setup discharge, some wall charges can be accumulated in the discharge cells.

The first rising ramp signal, the second rising ramp signal, and the flat period will be described in detail with reference to FIG. 5.

Here, it is preferable that the magnitude of the second voltage V2 is substantially the same as the magnitude Vsc of the voltage of the scan bias signal applied to the scan electrode Y in the address period after the reset period.

The magnitude of the third voltage V3 is the magnitude Vsc of the voltage of the scan bias signal applied to the scan electrode Y in the address period after the reset period and the scan electrode Y and / or in the sustain period after the address period. Alternatively, the sum of the magnitudes of the voltages Vs of the sustain signal applied to the sustain electrode Z may be substantially the same.

In the set-down period after the set-up period, the voltage drops from the third voltage V to the fourth voltage V4 and then drops from the fourth voltage V4 to the fifth voltage V5, and then the setup period. A ramp-down signal in a direction opposite to that of the rising ramp signal of may be supplied to the scan electrode.

Here, the falling ramp signal is preferably lowered from the fourth voltage V4 to the fifth voltage V5.

As the falling ramp signal is supplied, a weak erase discharge, that is, a setdown 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 address period after the reset period, a scan bias signal that substantially maintains the lowest voltage of the falling ramp signal, that is, a voltage higher than the fifth voltage V5, for example, the sixth voltage V6, is supplied to the scan electrode.

Here, the rising ramp signal may be supplied from the fifth voltage V5 to the sixth voltage V6, and the rising ramp signal may rise at substantially the same slope as the first rising ramp signal of the reset period.

Thereafter, a scan signal falling from the scan bias signal may be supplied to the scan electrode.

Meanwhile, the pulse width of the scan signal Scan supplied to the scan electrode in the address period of at least one subfield may be different from the pulse width of the scan signal of 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 can be made gradually, such as 2.6 Hz (microseconds), 2.3 Hz, 2.1 Hz, 1.9 Hz, or 2.6 Hz, 2.3 Hz, 2.3 Hz, 2.1 Hz. .... 1.9 ㎲, 1.9 ㎲ and so on.

As such, when the scan signal is supplied to the scan electrode, the data signal may be supplied to the address electrode corresponding to the scan signal.

When 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. .

Here, the sustain bias signal may be supplied to the sustain electrode in order to prevent the address discharge from becoming unstable due to the interference of the sustain electrode in the address period.

The sustain bias signal can keep the sustain bias voltage Vz smaller than the voltage of the sustain signal supplied in the sustain period and larger than the voltage of the ground level GND.

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

When such a sustain signal is supplied, the discharge cell selected by the address discharge is added with the wall voltage in the discharge cell and the sustain voltage Vs of the sustain signal, and a sustain discharge, i.e., display between the scan electrode and the sustain electrode when the sustain signal is supplied. Discharge may occur.

Meanwhile, in the at least one subfield, a plurality of sustain signals are supplied in the sustain period, and the pulse width of at least one sustain signal of the plurality of sustain signals may be different from the pulse widths of other sustain signals. For example, the pulse width of the sustain signal that is supplied first of the plurality of sustain signals may be larger than the pulse width of other sustain signals. Then, the sustain discharge can be more stabilized.

5 is a view for explaining a reset signal of the plasma display device according to an embodiment of the present invention.

Referring to FIG. 5, the scan electrode is supplied with a first rising ramp signal that gradually rises from the first voltage V1 to the second voltage V2 during the reset period for initializing the subfield, and the second voltage V2. The flattened period h and the second rising ramp signal rising from the second voltage V2 to the third voltage V3 may be supplied.

In addition, a falling ramp signal in which the voltage decreases from the third voltage V3 to the fourth voltage V4 and the voltage gradually decreases from the fourth voltage V4 to the fifth voltage V5 may be further supplied. .

Here, the set-up discharge occurs in the discharge cell by the rising ramp signal while rising from the first voltage V1 to the third voltage V3. By this setup discharge, wall charges can accumulate in the discharge cells.

In this process, as the voltage rises, the wall charge distribution may not be uniform, so that wall charges may be collected in a specific part or may be in a state in which wall charges are not distributed in a particular part.

Therefore, the planar period h having the second voltage V2 is inserted between the first voltage V1 and the third voltage V3 to serve as a breaker between discharges.

This makes it possible to redistribute wall charges which are not uniformly distributed, thereby reducing the occurrence of erroneous discharge and making the discharge stable.

Here, the slope of the first rising ramp signal rising from the first voltage V1 to the second voltage V2 and the slope of the second rising ramp signal rising from the second voltage to the third voltage may be equal to each other, It may be different.

However, it may be desirable for the slope of the first rising ramp signal to be greater than the slope of the second rising ramp signal.

If the slope of the first rising ramp signal is greater than the slope of the second rising ramp signal, the effect of rapidly raising the voltage before the flat period h and increasing the voltage relatively slowly after the flat period h is obtained. It is possible to further stabilize the setup discharge.

As a result, the duration of the setup discharge becomes relatively long, and the setup discharge is stabilized, so that the distribution of the wall charges can be made uniform.

In addition, the second voltage V2 may be any voltage as long as it is a voltage level between the first voltage V1 and the third voltage V3.

However, the second voltage V2 may be easy to use a voltage supplied from a voltage source applied in a circuit included in the driver.

For example, the sustain voltage Vs supplied to the scan electrode in the sustain period after the address period may be preferable, and the scan bias voltage Vsc supplied to the scan electrode in the address period after the reset period.

In addition, the second voltage V2 and the fourth voltage V4 may be the same or different.

For convenience of driving, the second voltage V2 and the fourth voltage V4 may be preferably at the same voltage level, but various types of applications may be applied at different voltage levels regardless of the magnitude of the voltage.

In addition, it is preferable that the length of the flat period h is 2 mW or more and 300 mW or less, and more preferably 10 mW or more and 100 mW or less.

In this case, when the length of the planar period h is excessively short, there may be a lack of time for uniformly distributing the wall charges, and thus, there is a high possibility of false discharge.

In addition, when the length of the flat period h is excessively long, the length of the reset period including the flat period h becomes excessively long, so that the length of subsequent address periods or sustain periods becomes relatively short. This can adversely affect sustain discharge.

For this reason, it may be preferable that the length of the flat period h is 2 mW or more and 300 mW or less, more preferably 10 mW or more and 100 mW or less.

6 is a diagram for explaining a pre-reset signal.

Referring to FIG. 6, a pre-reset period may be further included before the reset period of the first subfield. In this pre-reset period, the scan electrode may be supplied with a first signal that is negative from the reset signal supplied to the scan electrode in the reset period.

In addition, while the first signal is supplied to the scan electrode, a second signal that is positive from the reset signal may be supplied to the sustain electrode.

The magnitude of the voltage of the second signal may be approximately equal to the voltage of the sustain signal supplied in the sustain period, that is, the sustain voltage Vs.

As such, when the first signal is supplied to the scan electrode and the second signal is supplied to the sustain electrode in the pre-reset period, wall charges of a predetermined polarity are accumulated on the scan electrode, and the polarity opposite to the scan electrode is on the sustain electrode. Wall charges accumulate. For example, a positive wall charge may be accumulated on the scan electrode, and a negative wall charge may be accumulated on the sustain electrode.

Accordingly, it is possible to generate a setup discharge of sufficient intensity in the reset period after the pre-reset period, and thus, the initialization can be sufficiently stable.

In addition, even if the voltage of the rising ramp signal supplied to the scan electrode becomes smaller in the reset period, it is possible to generate the setup discharge of sufficient intensity.

From the viewpoint of securing the driving time, the pre-reset period may be included before the reset period in the first subfield among the subfields of the frame or the pre-reset period before the reset period in the two or three subfields. Do.

7A to 7B are diagrams for explaining another example of the reset signal.

First, the reset signal of FIG. 7A may include a rising ramp signal that gradually rises from the ground voltage to the flat period h, and then maintains a constant voltage, including the flat period h, of the additional rising ramp signal. After the voltage drops without supply, it may include a ramp signal in which the voltage gradually falls.

In this case, the length of the flat period h may be preferably 2 μm or more and 300 μm or less, and more preferably 10 μm or more and 100 μm or less as in FIG. 5.

Next, the reset signal of FIG. 7B may include a rising ramp signal that gradually rises up to a flat period h after the voltage rises rapidly from the ground voltage to a predetermined voltage, and then includes a constant voltage including the flat period h. It may include a ramp signal that maintains and after the voltage falls without the supply of additional rising ramp signal, the voltage gradually falls.

Also in this case, the flat period h may be preferably 2 µm or more and 300 µm or less, and more preferably 10 µm or more and 100 µm or less.

As described above, in the reset signal of FIGS. 7A and 7B, the rising ramp signal that may be supplied after the flat period h may be omitted.

7A and 7B, the voltage of the flat period may be any voltage level regardless of the magnitude of the voltage as in FIG. 5, but the scan bias voltage Vsc supplied to the scan electrode in the address period after the reset period may be used. Or scan voltage Vs supplied to the scan electrodes in the sustain period after the address period.

As such, the form of the reset signal is not limited to the form of the reset signal described with reference to FIG. 5, and the reset signal described with reference to FIGS. 7A to 7B as well as other types of reset signals not described herein may be used for the flat period h. ) Can be changed and applied in various forms.

Meanwhile, xenon (Xe) may be included in the discharge gas of the plasma display panel, and when the xenon content is increased, the luminance may be increased by increasing the generation amount of vacuum ultraviolet rays in the discharge cell.

On the other hand, if the xenon content is increased, the wall charge is not uniformly distributed, and a lot of phenomenon may occur more frequently in a certain part.

Accordingly, an excessively strong discharge may occur in a place where the wall charges are aggregated, or the probability of occurrence of an erroneous discharge may be further increased.

Therefore, when a reset signal including a flat period is supplied to a plasma display panel containing a large amount of xenon, as the xenon content is increased, wall charges that may be collected in a specific portion may be uniformly distributed, thereby preventing mis-discharge. You can do it.

Accordingly, the phenomenon that the wall transfer due to the increase of the xenon content is agglomerated in a specific portion can be more effectively prevented by supplying a reset signal including a flat period.

Looking at the content of such xenon with reference to the accompanying Figures 8a to 8b as follows.

8A to 8B are diagrams for explaining the content of xenon contained in the discharge gas.

8A to 8B, xenon (Xe) is included in the discharge gas while the glass substrate of the image filter contains a blue pigment of cobalt material, and the content of xenon (Xe) is changed from 5% to 25%. Data showing luminance when the 25% window pattern image is displayed on the screen, and measuring a discharge start voltage (Firing Voltage) between the scan electrode and the sustain electrode are shown.

Referring to FIG. 8A, when the content of xenon (Xe) in the discharge gas is about 5%, the luminance of the implemented image is 328 [cd / m ² ], and when 9% is about 345 [cd / m ² ]. , Relatively small.

On the other hand, when the content of xenon (Xe) is 10%, the luminance increases to approximately 351 [cd / m ² ]. As such, as the content of xenon (Xe) is increased, the brightness is increased. Xenon (Xe) has a characteristic of increasing the generation of vacuum ultraviolet rays during discharge, and thus xenon (Xe) of the discharge gas filled in the discharge cell. This is because the amount of light generated in the discharge cell increases as the content increases.

In addition, when the content of xenon (Xe) is 11%, the luminance is about 353 [cd / m ² ], and when the content of xenon (Xe) is about 12% or more and 15% or less, the brightness is 371 [cd / m ^2]. ] And higher than 391 [cd / m ² ].

In addition, when the content of xenon (Xe) is 16% or more, the luminance is approximately 395 [cd / m ² ] or more.

Referring to the data of FIG. 8A, when the xenon (Xe) content is in the range of 10% or more and 20% or less, as the xenon (Xe) content is increased, the luminance of the implemented image is gradually increased.

If the content of xenon (Xe) is more than 25% it can be seen that the effect of improving the brightness is insignificant.

Next, referring to FIG. 8B, when the content of xenon (Xe) in the discharge gas is about 5%, the discharge start voltage between the scan electrode and the sustain electrode is about 135V, and when it is 9%, it is about 136V, which is relatively small.

On the other hand, when the content of xenon (Xe) is 10%, the discharge start voltage increases to approximately 137V.

In addition, when the content of xenon (Xe) is 11%, the discharge start voltage is about 137V, and when the content of xenon (Xe) is about 12% or more and 15% or less, the discharge start voltage is about 138V or more and 140V or less.

In addition, when the content of xenon (Xe) is 16% or more and 20% or less, the discharge start voltage is approximately 141V or more and 143V or less, and when the content of xenon (Xe) is 25% or more, the discharge start voltage rapidly rises to approximately 153V or more. can do.

As described above, even when iron is included in the glass substrate of the image filter, when the content of xenon (Xe) is increased, the luminance of the image is increased, and conversely, the discharge start voltage between the scan electrode and the sustain electrode is increased. It can be seen.

Therefore, in order to increase the UV blocking rate and improve the luminous efficiency of the plasma display panel while maintaining the luminance of the image sufficiently high, the discharge gas filled between the front substrate and the rear substrate contains 10% or more of xenon (Xe) to 20% or less. It may be preferable, and more preferably may comprise 12% or more and 15% 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.

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

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

FIG. 3 is a diagram illustrating an image frame for implementing grayscale of an image in a plasma display device according to an embodiment of the present invention. FIG.

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

5 is a view for explaining a reset signal of the plasma display device according to an embodiment of the present invention.

6 is a diagram for explaining a pre-reset signal;

7A to 7B are views for explaining another example of the reset signal.

8A to 8B are views for explaining the content of xenon contained in the discharge gas.

Claims (9)

A plasma display panel in which scan electrodes and sustain electrodes are disposed; A driver supplying a driving signal to the scan electrode and the sustain electrode Including, The driving unit includes a first rising ramp signal rising from a first voltage to a second voltage and a second rising ramp from a second voltage to a third voltage to the scan electrode during a reset period for initializing a plurality of subfields of a frame. Supply a reset signal comprising a ramp signal, Flat-Period in which a constant voltage is maintained between the first rising ramp signal and the second rising ramp signal. Plasma display device comprising a. The method of claim 1, And the flat period has a length of 2 m or more and 300 m or less. The method of claim 2, And the flat period has a length of 10 µm or more and 100 µm or less. The method of claim 1, And the first voltage is a ground (GND) voltage. The method of claim 1, And said second voltage is a sustain voltage (Vs). The method of claim 1, And the reset signal is supplied to at least one subfield of the plurality of subfields. The method of claim 1, And the driver supplies a first signal, which is a negative signal, to the scan electrode and a second signal, which is a positive signal, to the sustain electrode during the pre-reset period before the reset period. The method of claim 1, The plasma display panel is filled with a discharge gas including xenon (Xe), The xenon content is 10% or more 20% or less plasma display device. The method of claim 8, The xenon content is 12% or more and 15% or less plasma display device.

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