KR100784526B1 - Plasma Display Apparatus - Google Patents

Abstract

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

A plasma display apparatus according to an embodiment of the present invention includes a plasma display panel for displaying an image in a frame including a plurality of subfields and a driving unit for increasing one frame to a plurality of frames in a no signal mode .

A plasma display apparatus according to another embodiment of the present invention includes a plasma display panel having a plurality of scan electrodes formed therein and a driver for scanning a plurality of scan electrodes in a plurality of frames in a no signal mode, .

The plasma display apparatus according to an embodiment of the present invention further improves the stability of the plasma display panel and the circuit using the improved interlace method in the no signal mode.

Description

[0001] Plasma Display Apparatus [0002]

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

2A and 2B are views for explaining a structure of a plasma display panel included in a plasma display apparatus according to an embodiment of the present invention.

FIG. 3 is a diagram for explaining a frame for implementing gradation of an image in a plasma display apparatus according to an embodiment of the present invention. Referring to FIG.

4 is a view for explaining the operation of the plasma display apparatus according to an embodiment of the present invention in detail.

FIG. 5A is a view illustrating a first embodiment of a variation of a frame in a no-signal mode in a plasma display apparatus according to an embodiment of the present invention.

FIG. 5B is a view illustrating a second embodiment of a variation of a frame in a no-signal mode in a plasma display apparatus according to an embodiment of the present invention.

FIG. 5C is a view illustrating a third embodiment of a variation of a frame in the no-signal mode in the plasma display apparatus according to an embodiment of the present invention.

FIG. 6 is a view illustrating a fourth embodiment of a variation of a frame in the no-signal mode in the plasma display apparatus according to an embodiment of the present invention.

7 is a view illustrating a fifth embodiment of a variation of a frame in the no-signal mode in the plasma display apparatus according to an embodiment of the present invention.

FIGS. 8A and 8B are views for explaining a first embodiment of a variation of scanning in a no-signal mode in a plasma display apparatus according to another embodiment of the present invention.

FIGS. 9A and 9B are views for explaining a second embodiment of a variation of scanning in a no-signal mode in a plasma display apparatus according to another embodiment of the present invention.

FIGS. 10A and 10B are views for explaining a third embodiment of the non-signal mode scanning change in the plasma display apparatus according to another embodiment of the present invention.

Description of the Related Art

100: plasma display panel 110:

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

2. Description of the Related Art Generally, a plasma display apparatus includes a plasma display panel having a plurality of electrodes formed thereon and a driver for driving electrodes of the plasma display panel.

The plasma display panel includes a front panel including a front substrate and a rear panel including a rear substrate.

A discharge cell is formed between the front substrate and the rear substrate.

The driving unit supplies a predetermined driving voltage to the discharge cells of the plasma display panel in a plurality of subfields of a frame. Then, a discharge such as a reset discharge, an address discharge, and a sustain discharge occurs in the discharge cell of the plasma display panel by the driving voltage.

Thus, when a predetermined driving voltage is supplied to discharge in the discharge cell, the discharge gas filled in the discharge cell generates high frequency light such as vacuum ultraviolet rays.

This high-frequency light emits a phosphor formed in the discharge cell, wherein the phosphor layer generates visible light, thereby realizing an image.

Such a plasma display device can be configured with a thin and light structure, and thus it is attracting attention as a next generation display device.

In this plasma display apparatus, a predetermined driving voltage is supplied to the electrodes formed on the plasma display panel to generate a discharge such as a reset discharge, an address discharge, and a sustain discharge. As a result, Lt; / RTI >

For example, when a video signal inputted from outside is blocked when the video is implemented by such a discharge, for example, when a predetermined video signal is supplied from a sky wave broadcasting station to a video receiver through a fixed channel, Or when a predetermined video signal is supplied from a sky wave broadcasting station to a video receiver at a fixed time.

When such a video signal is continuously supplied to the plasma display device for a long time, the plasma display panel judges the video signal as data and operates the data switching. Such data switching generates a lot of heat and increases the temperature. When the temperature is increased, the load on the circuit is increased, which causes many problems in protecting the plasma display panel and the circuit.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a plasma display device capable of preventing afterimage and protecting a circuit using an improved interlace method in a non-signal mode.

According to an aspect of the present invention, there is provided a plasma display apparatus including a plasma display panel for displaying an image in a frame including a plurality of subfields, And a driving unit which extends the frame in the frame.

In the non-signal mode, the driving unit may extend one frame into a plurality of frames each having one or more subfields.

The driving unit is characterized in that one frame is divided into two consecutive frames each having the same number of subfields in the non-signal mode.

According to another aspect of the present invention, there is provided a plasma display apparatus including a plasma display panel having a plurality of scan electrodes and a plurality of scan electrodes in a no signal mode, And a driving unit that scans the input image.

The driving unit may scan at least one of the plurality of scan electrode groups including at least one of the plurality of scan electrodes in another frame.

Further, the driving unit scans the same number of scan electrodes in each of a plurality of frames.

The driving unit scans the odd-numbered scan electrodes among the plurality of scan electrodes in the a-th frame, and the even-numbered scan electrodes receive the a + And scanning is performed in one frame.

 In the non-signal mode, the input of a video signal from the outside is blocked or the voltage of the video signal is lower than a threshold voltage.

The threshold voltage is 40dB or less.

Hereinafter, a plasma display apparatus 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 a 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 and a driving unit 110.

The plasma display panel 100 includes a front panel (not shown) and a rear panel (not shown) that are attached to each other with a predetermined gap therebetween, and a plurality of electrodes (e.g., a scan electrode Y and a sustain electrode Z) do. In addition, it is preferable that the address electrodes X are formed so as to cross the scan electrodes Y and the sustain electrodes Z. The structure of such a plasma display panel 100 will be described in more detail with reference to FIGS. 2A and 2B.

The driving unit 110 supplies a predetermined driving voltage to the electrodes of the plasma display panel 100. The plasma display panel 100 includes a scan electrode Y and a sustain electrode Z arranged in parallel with the scan electrode Y. An address crossing the scan electrode Y and the sustain electrode Z When the electrode X is formed, the driving unit 110 includes a data driver, a scan driver, and a sustain driver.

The data driver drives the address electrodes X of the plasma display panel 100. For example, data of the data voltage (Vd) is supplied to the address electrode (X).

The scan driver drives the scan electrodes Y of the plasma display panel 100. For example, in at least one of subfields of a frame, an address period after a reset period (-Vy) of the negative scan pulse falling from the scan reference voltage (Vsc) to the scan electrode (Y) in the address period.

The sustain driver drives the sustain electrode Z of the plasma display panel 100. [ For example, the sustain pulse of the sustain voltage (Vs) is supplied to the sustain electrode (Z) during the sustain period after the address period.

In addition, the driving unit 110 may increase one frame to a plurality of frames in a no signal mode, increase one frame into a plurality of frames each having one or more subfields, The number of subfields is increased to two consecutive frames having the divided subfields.

In addition, the driving unit 110 scans a plurality of scan electrodes in a plurality of frames in a no signal mode. For example, one or more of the plurality of scan electrode groups including at least one scan electrode among the plurality of scan electrodes may scan in another frame or scan the same number of scan electrodes in a plurality of frames.

In addition, the driving unit 110 scans the odd-numbered scan electrodes among the plurality of scan electrodes in the a-th frame and the even-numbered scan electrodes in the (a + 1) -th frame.

The driving unit 110, which is a main feature of the plasma display apparatus according to the embodiment of the present invention described so far, will be clarified through the following description.

The plasma display panel included in the plasma display apparatus according to an embodiment of the present invention will be described in detail with reference to FIGS. 2A and 2B.

2A and 2B are views for explaining a structure of a plasma display panel included in a plasma display apparatus according to an embodiment of the present invention.

2A, a plasma display panel according to an exemplary embodiment of the present invention includes a front substrate 201 on which an electrode, preferably a scan electrode 202 and a sustain electrode 203, and a sustain electrode 203 are formed. And a rear substrate 211 on which electrodes, preferably address electrodes 213, X, which intersect the above-described scan electrodes 202, Y and the sustain electrodes 203, And the rear panel 210 including the rear panel 210 are joined together.

Here, the electrodes formed on the front substrate 201, preferably the scan electrodes 202 and the sustain electrodes 203 and the sustain electrodes 203 and Z, generate a discharge in a discharge space, that is, a discharge cell, The discharge is maintained.

The upper surface of the front substrate 201 on which the scan electrodes 202 and the sustain electrodes 203 and the sustain electrodes Z are formed is covered with a dielectric layer such as a scan electrode 202 and a sustain electrode 203, A dielectric layer 204 is formed.

The upper dielectric layer 204 limits the discharge current of the scan electrodes 202 and the sustain electrodes 203 and the sustain electrodes 203 and Z and isolates the sustain electrodes 203 and Z from the scan electrodes 202 and Y.

A protective layer 205 is formed on the upper surface of the upper dielectric layer 204 to facilitate discharge conditions. The protective layer 205 is formed by depositing a material containing magnesium oxide (MgO) or the like on the upper dielectric layer 204 or the like.

On the other hand, the electrodes formed on the rear substrate 211, preferably the address electrodes 213 and X, supply data Data to the discharge cells.

A dielectric layer 215, preferably a lower dielectric layer 215, is formed on the rear substrate 211 on which the address electrodes 213 and the address electrodes 213 are formed.

The lower dielectric layer 215 insulates the address electrodes 213 (X).

A barrier rib 212 such as a stripe type or a well type for partitioning a discharge space, that is, a discharge cell, is formed on the lower dielectric layer 215.

Accordingly, a discharge cell is formed between the front substrate 201 and the rear substrate 211.

Here, a predetermined discharge gas is filled in the discharge cells partitioned by the barrier ribs 212.

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

When the driving voltage is supplied to at least one of the scan electrodes 202 and the sustain electrodes 203 and the sustain electrodes 203 and the address electrodes 213 and X, Discharge occurs in the discharge cells partitioned by the discharge cells.

Then, a vacuum ultraviolet ray is generated in the discharge gas filled in the discharge cell, and this vacuum ultraviolet ray is applied to the phosphor layer 214 formed in the discharge cell. A predetermined visible light is generated in the phosphor layer 214 and the visible light is emitted to the outside through the front substrate 201 on which the upper dielectric layer 204 is formed, A predetermined image is displayed on the surface.

2A, only the case where the scan electrode 202 and the sustain electrode Y and the sustain electrode 203 and Z are formed as one layer is shown and described. Alternatively, the scan electrode 202 and the sustain electrode 203, It is also possible that at least one of the electrodes 203 and Z is composed of a plurality of layers. Referring to FIG. 2B, it is as follows.

Referring to FIG. 2B, each of the scan electrodes 202 and the sustain electrodes 203 and the sustain electrodes Z may be formed of two layers.

In particular, considering the light transmittance and the electric conductivity, the scan electrode 202 and the sustain electrode 203 and the sustain electrode 203 and Z are opaque silver (Ag And transparent electrodes 202a and 203a made of transparent indium tin oxide (ITO).

The reason why the scan electrodes 202 and the sustain electrodes 203 and the sustain electrodes 203 and Z include the transparent electrodes 202a and 203a is that when visible light generated in the discharge cells is emitted to the outside of the plasma display panel So as to be effectively discharged.

The reason for including the scan electrodes 202 and Y and the sustain electrodes 203 and Z includes the bus electrodes 202b and 203b is that the scan electrodes 202 and Y and the sustain electrodes 203 and Z are connected to the transparent electrodes 203 and Z, The driving efficiency may be reduced because the electric conductivity of the transparent electrodes 202a and 203a is relatively low in the case of including only the transparent electrodes 202a and 203a and the transparent electrodes 202a and 203a, In order to compensate for the low electrical conductivity.

2A and 2B show only a plasma display panel according to an embodiment of the present invention, and the present invention is not limited to the plasma display panel having the structure as shown in FIGS. 2A and 2B. 2A and 2B, the upper dielectric layer 204 and the lower dielectric layer 215 are each a single layer. However, the upper dielectric layer 204 and the lower dielectric layer 215 may be formed of the same material, At least one of the dielectric layers 215 may be formed of a plurality of layers.

The operation of the plasma display apparatus according to an embodiment of the present invention including such a plasma display panel will be described with reference to FIGS. 3 and 4 attached hereto.

FIG. 3 is a diagram for explaining a frame for implementing gradation of an image in a plasma display apparatus according to an embodiment of the present invention. Referring to FIG.

4 is a view for explaining the operation of the plasma display apparatus according to an embodiment of the present invention in detail.

Referring to FIG. 3, a frame for implementing a gray level of an image in a plasma display device according to an exemplary embodiment of the present invention is divided into several subfields having different emission counts. Although not shown, each subfield includes a reset period for initializing all the discharge cells, an address period for selecting a discharge cell to be discharged, and a sustain period for implementing gradation 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 8 subfields (SF1 to SF8), for example, as shown in FIG. 3, Each of the subfields SF1 to SF8 is divided into a reset period, an address period, and a sustain period.

On the other hand, the number of sustain pulses supplied in the sustain period may be adjusted to set the gray level weight of the corresponding subfield. That is, it is possible to apply predetermined gradation weighting to each subfield using the sustain period. For example, in a method of setting the gray scale weight of the first sub-field to 20 and the gray-scale weight of the second sub-field to 21, the gray-scale weight of each sub-field is 2n (n = 0, 3, 4, 5, 6, 7) of the subfields. Thus, by adjusting the number of sustain pulses supplied in the sustain period of each subfield according to the gray level weight in each subfield, the gray levels of various images are realized.

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

In FIG. 3, only one frame is composed of eight subfields. However, the number of subfields forming one frame can be changed variously. For example, one frame may be composed of 12 sub-fields from the first sub-field to the 12th sub-field, or one frame may be composed of 10 sub-fields.

The image quality of the image implemented by the plasma display device implementing the gradation of the image in the frame may be determined according to the number of the subfields included in the frame. That is, if the number of subfields included in the frame is 12, the gradation of 212 images can be expressed. If the number of subfields included in the frame is 8, the gradation of 28 images can be implemented.

In FIG. 3, although the subfields are arranged in the order of increasing the gray level weight in one frame, the subfields may be arranged in the order of decreasing the gray level weight in one frame, The subfields may be arranged regardless of the subfields.

Referring to FIG. 4, the operation of a plasma display device according to an exemplary embodiment of the present invention in any one of a plurality of subfields included in a frame as shown in FIG. 3 is shown.

Referring to FIG. 4, in the plasma display apparatus according to the embodiment of FIG. 1, the driving unit supplies a ramp-up waveform in which the voltage gradually rises in the scan electrode Y in the setup period of the reset period .

Due to such a rising ramp waveform, a weak dark discharge (i.e., setup discharge) occurs in the discharge cell. This set-up discharge accumulates a certain amount of wall charges in the discharge cells.

In a set-down period after the set-up period, a ramp-up waveform is supplied to the scan electrode Y, and then a ramp-down waveform in which the voltage gradually decreases from a predetermined positive voltage lower than the peak voltage of the ramp- The waveform can be supplied.

As a result, a weak erase discharge (i.e., a setdown discharge) occurs in the discharge cell. Due to the set-down discharge, part of the wall charges accumulated in the discharge cells due to the previous set-up discharge are erased, so that the wall charges uniformly remain in the discharge cells such that the address discharge can be stably generated.

In the address period after the reset period including the set-up period and the set-down period, the scan reference voltage Vsc and the voltage -Vy of the negative scan pulse Scan descending from the scan reference voltage Vsc, (Y).

In addition, when the voltage (-Vy) of the negative polarity scan pulse of the driving unit is supplied to the scan electrode Y, the data signal is supplied to the address electrode X corresponding thereto.

In order to prevent erroneous discharge due to interference of the sustain electrode Z in the address period, the sustain bias voltage Vzb may be supplied to the sustain electrode Z in the address period.

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

In the discharge cells selected by the address discharge, a wall charge is formed to such an extent that a discharge can occur when the sustain voltage (Vs) of the sustain pulse is supplied.

In this manner, the sustain pulse (SUS) can be supplied to the scan electrode Y or the sustain electrode Z in the sustain period after the address period.

As a result, the wall voltage in the discharge cell and the sustain voltage (Vs) of the sustain pulse (SUS) are added to the discharge cells selected by the address discharge, so that the scan electrodes Y and the sustain electrodes Z, that is, a display discharge occurs. Accordingly, a predetermined image is realized on the plasma display panel.

The plasma display apparatus described above will be described below in detail with respect to various embodiments in which one frame is increased to at least two frames in a non-signal mode on a plasma display panel displaying an image in a frame including a plurality of subfields.

FIG. 5A is a view illustrating a first embodiment of a variation of a frame in a no-signal mode in a plasma display apparatus according to an embodiment of the present invention.

First, in the non-signal mode, the non-signal mode is when the input of the video signal from the outside is interrupted. In other words, noise is generated on the screen because no video signal is supplied. For example, when a predetermined video signal is supplied from the over-the-air broadcasting station to the video receiver through a fixed channel, a signal generated when the video signal is out of the fixed channel or a predetermined video signal from the over- And the signal that occurs outside of this fixed time is referred to as a non-signal mode.

Or when the voltage of the video signal is equal to or less than the threshold voltage. This is because if the voltage of the video signal is less than the threshold voltage and supplied to the video receiver, the video is not clearly seen and the video is collapsed. The preferable threshold voltage is formed to be 40 dB or less. Here, the unit of the threshold voltage is represented by [dB], and the voltage of the video signal may have a frequency. In other words, the nature of a signal with frequency is not proportional to the measured value in the natural state, but is quantitatively proportional to its [dB] scale.

FIG. 5A shows the change of the frame of the plasma display device in the no-signal mode. FIG. 5A is a general frame shown to more clearly show the change of the frame shown in FIG. 5A. In FIG. 5A, the subfield may be represented by X when the signal is not supplied.

5A can supply signals to the first, third, fifth, and seventh subfields of the first frame, and can supply signals to the second, fourth, sixth, and eight subfields of the second frame. In the first frame, signals can be supplied only to odd-numbered subfields, and signals can not be supplied to even-numbered subfields. On the contrary, in the second frame, signals can be supplied only to even-numbered subfields, and signals can not be supplied to odd-numbered subfields. When a signal is supplied in an interlace manner as described above, the number of sustain pulses of one frame can be reduced because a subfield constituted by one frame can be composed of two frames. As a result, the number of sustain pulses is reduced, thereby reducing data switching. Thus, the heat generated by the data switching can be reduced to protect the circuit and the plasma display panel.

In FIG. 5A, when a sub-field consisting of one frame in the no-signal mode is composed of two frames, the sub-field is divided into the same number of sub-fields to form two frames. However, . A detailed description thereof is shown in FIG.

FIG. 5B is a view illustrating a second embodiment of a variation of a frame in a no-signal mode in a plasma display apparatus according to an embodiment of the present invention.

In FIG. 5B, a description overlapping with FIG. 5A will be omitted. 5B can supply a signal to one subfield of the first frame and supply signals to the second, third, fourth, fifth, sixth, seventh and eighth subfields of the second frame. In the first frame, signals may be supplied only to the first subfield, and signals may not be supplied to the remaining subfields except for the first subfield. On the contrary, in the second frame, signals can be supplied only to the remaining sub-fields except for the first sub-field, and signals may not be supplied to the first sub-field. When a signal is supplied in an interlace manner as described above, the number of sustain pulses of one frame can be reduced because a subfield constituted by one frame can be composed of two frames.

Also, although not shown, the case opposite to Fig. 5B is also possible. A signal can be supplied to the 2, 3, 4, 5, 6, 7, 8 subfields of the first frame and a signal can be supplied to one subfield of the second frame.

Therefore, the same effect as that shown in FIG. 5A may be obtained though it will be slightly different depending on the characteristics of the panel.

Next, as shown in FIG. 5A, the subfields constituting one frame may be divided into a low gray level and a high gray level of a subfield without dividing the odd and even number of subfields. A detailed description thereof is shown in FIG.

FIG. 5C is a view illustrating a third embodiment of a variation of a frame in the no-signal mode in the plasma display apparatus according to an embodiment of the present invention.

In FIG. 5C, a description overlapping with FIG. 5A will be omitted. FIG. 5C can supply signals to the first, second, third, and fourth subfields of the first frame and supply signals to the fifth, sixth, seventh, and eighth subfields of the second frame. In an embodiment of the present invention, a low gray level subfield is defined as 1, 2, 3, and 4 subfields and a high gray level subfield is defined as 5, 6, 7, and 8 subfields. Accordingly, subfields divided into a low gray level and a high gray level may be different. In the first frame, the signal can be supplied only to the low gray level subfield, and the signal can not be supplied to the high gray level subfield. On the other hand, in the second frame, signals can be supplied only to the high gray level subfields, and signals can not be supplied to the low gray level subfields.

Although not shown in the drawing, it is also possible to supply signals to all of the first, second, third, fourth, fifth, sixth, seventh and eighth subfields in the first frame and not supply the signals to the second frame. 5C may be slightly different depending on the characteristics of the panel, but the same effects as those of FIG. 5A can be obtained.

Although the subfield having one frame has been described as being composed of two frames, the present invention is not limited to this, and the following description will be made with respect to various embodiments of the present invention.

6 is a view for explaining a fourth embodiment of a variation of a non-signal mode frame in a plasma display apparatus according to an embodiment of the present invention. Referring to FIG.

First, FIG. 6B shows a change of the plasma display device frame in the no-signal mode. Fig. 6 (a) is a general frame shown to more clearly show the change of the frame shown in Fig. 6 (b). In Fig. 6, the number of subfields constituting one frame is nine, and one embodiment of the present invention will be described.

6 (b) can supply signals to the first, fourth, and seventh subfields of the first frame and supply signals to the second, fifth, and eighth subfields of the second frame, and finally, 6, and 9 subfields. In other words, in the first frame, the signals may be supplied only to the first, fourth, and seventh subfields, that is, the subfields where the difference between the subfields is increased by three, and the signals may not be supplied to the remaining subfields. In the second frame, signals may be supplied only to the 2, 5, and 8 subfields, and no signals may be supplied to the remaining subfields. Finally, signals can be supplied only to the 3, 6, and 9 subfields of the third frame, and no signals may be supplied to the remaining subfields.

When a signal is supplied with a slight change in the interlace scheme, the subfield composed of one frame can be composed of three frames, so that the number of sustain pulses of one frame can be further reduced. Since the number of sustain pulses is further reduced, data switching can be further reduced. Therefore, the heat generated by the data switching can be reduced and the circuit and the plasma display panel can be protected.

FIG. 7 is a view illustrating a fifth embodiment of a variation of a non-signal mode frame in a plasma display apparatus according to an embodiment of the present invention. Referring to FIG.

First, FIG. 7 (b) shows a change in frame when a silent signal is supplied to the plasma display device. 7 (a) is a general frame shown to more clearly show the change of the frame shown in Fig. 7 (b). In Fig. 6, the number of subfields constituting one frame is eight, and one embodiment of the present invention will be described.

7B can supply a signal to the first and fifth subfields of the first frame and supply signals to the second and sixth subfields of the second frame and supplies signals to the third and seventh subfields of the third frame And finally supply signals to the 4, 8 subfields of the fourth frame. In other words, in the first frame, signals can be supplied only to the subfields in which the difference between the first and fifth subfields, that is, the subfields is increased by four, and no signal is supplied to the remaining subfields. In the second frame, signals can be supplied only to the 2 < 6 > sub-fields and no signals are supplied to the remaining sub-fields. A signal can be supplied only to the third and seventh subfields of the third frame, and no signal may be supplied to the remaining subfields. Finally, signals can be supplied only to the 4th and 8th subfields of the fourth frame, and no signal may be supplied to the remaining subfields.

When a signal is supplied with a slight change in the interlace scheme, a subfield composed of one frame can be composed of four frames, so that the number of sustain pulses of one frame can be remarkably reduced. As a result, the number of sustain pulses is significantly reduced, and data switching can be further reduced. Therefore, the heat generated by the data switching can be reduced and the circuit and the plasma display panel can be protected.

In FIGS. 5A to 7, only a case where eight sub-fields or nine sub-fields are included in one frame has been described. However, the number of sub-fields may be 10, 12, and so on.

Although the present invention has been described above with respect to a method of increasing a frame by changing a subfield of a frame, a scanning method will be described as follows.

FIGS. 8A and 8B are views for explaining a first embodiment of a variation of scanning in a no-signal mode in a plasma display apparatus according to another embodiment of the present invention.

First, in the first embodiment of dividing the plurality of scan electrodes of the plasma display panel according to another embodiment of the present invention, the plasma display panel 400 includes a total of 2n-1 (n is a natural number) scan electrodes Y A plurality of scan electrodes Y may be divided into an odd scan electrode and an even scan electrode.

For example, the odd scan electrodes Y ₁ From the scan electrode Y _2n The odd-numbered scan electrodes may include odd-numbered scan electrodes to the scan electrodes, and the even-numbered scan electrodes may include Y ₁ From the scan electrode Y _2n The scan electrodes can be divided to include even-numbered ones.

Here, it is preferable that all the scan electrodes Y included in one scan electrode have a continuous scan sequence. For example, in the case of FIG. 8A, the odd scan electrode is Y ₁ May comprise the scan electrodes Y _{2n -1} from the scan electrode, wherein a scan sequence may be the faster the scan electrode in the odd-numbered scan electrodes Y _1, Y _3, followed by The scan electrode, in this order, is the scan order Y ₅ ..... Y ₂₅ .Y ₂₇ .Y ₂₉ ..... Y _2n-1 . The even scan electrodes may be the same.

In this manner, signals can be supplied according to the odd scan electrodes and the even scan electrodes. Next, FIG. 8B shows a frame to which a silent call is supplied.

In FIG. 8B, the duplicated description that has been described so far will be omitted. The non-signal is supplied to all the frames, and the second frame will be described in FIG. 8B.

First, in FIG. 8B, odd scan electrodes can be scanned in the first subfield of the first frame, and even scan electrodes can be scanned in the second subfield of the first frame. Subsequently, odd scan electrodes can be scanned in the odd subfields of the first frame, and even scan electrodes can be scanned in the even subfields of the first frame. In the second frame, even-numbered scan electrodes can be scanned in the odd sub-field, and odd scan electrodes can be scanned in the even-numbered sub-fields in the second frame.

In addition to this method, the odd scan electrodes can be scanned in the first frame and the even scan electrodes can be scanned in the second frame as shown in (b). In other words, odd scan electrodes can be scanned in the odd frame, and even scan electrodes can be scanned in the even frame.

As described above, when the signals are divided into the odd-numbered scan electrodes and the even-numbered scan electrodes and the signals are supplied in an interlace manner, the number of times of scanning on one screen, that is, the number of times of scanning the scan electrodes, can be reduced by half. Reducing scanning in half can also reduce data switching. Therefore, the heat generated by the data switching can be reduced and the circuit and the plasma display panel can be protected.

In FIGS. 8A and 8B, odd-numbered scan electrodes are divided into even-numbered scan electrodes, but it is also possible to scan the scan electrodes by group. This is shown in FIGS. 9A and 9B.

FIGS. 9A and 9B are views for explaining a second embodiment of a variation of scanning in a no-signal mode in a plasma display apparatus according to another embodiment of the present invention.

Referring to FIG. 9A, a second embodiment of dividing a plurality of scan electrodes of a plasma display panel according to another embodiment of the present invention into scan electrode groups will be described.

First, a second embodiment of dividing a plurality of scan electrodes of a plasma display panel according to another embodiment of the present invention into a plurality of scan electrode groups may include a structure in which the plasma display panel 500 includes a total of 100 scan electrodes Y A plurality of scan electrodes Y can be divided into an A scan electrode group 510 and a B scan electrode group 520.

For example, the A scan electrode group may include Y ₁ scan electrodes to Y ₅₀ scan electrodes, and the B scan electrode group may include Y ₅₁ scan electrodes to Y ₁₀₀ scan electrodes.

Here, it is preferable that all the scan electrodes Y included in one scan electrode group have a continuous scan sequence. In other words, a predetermined number of scan electrodes Y are grouped according to the scan sequence to set the scan electrode group. For example, in the case of FIG. 9A, the A scan electrode group may include Y ₁ scan electrodes to Y ₅₀ scan electrodes, where the Y ₁ scan electrodes of the A scan electrode group may be the fastest and the Y ₂ scan electrodes, the scan sequence in this order is Y ₃ ..... Y ₂₄ .Y ₂₅ .Y _{26 ...} Y ₅₀ .

Thus, signals are supplied according to the A scan electrode group and the B scan electrode group. Next, Fig. 9B shows a frame in which no signal is supplied.

In FIG. 9B, the duplicated description that has been described so far will be omitted. The signal is supplied to all the frames, and the second frame will be described in FIG. 9B as well.

First, in FIG. 9A, the A scan electrode group can be scanned in the first subfield of the first frame, and the B scan electrode group can be scanned in the second subfield of the first frame. Thereafter, the A scan electrode group can be scanned in the odd subfield of the first frame, and the B scan electrode group can be scanned in the even subfield of the first frame. In the second frame, the B scan electrode group can be scanned in the odd subfield, and the A scan electrode group can be scanned in the odd subfield in the second frame.

In addition to this method, the A scan electrode group can be scanned in the first frame and the B scan electrode group can be scanned in the second frame as shown in (b). In other words, the A scan electrode group can be scanned in the odd frame, and the B scan electrode group can be scanned in the even frame.

As described above, when the signals are divided into the A scan electrode group and the B scan electrode group and the signals are supplied in an interlace manner, the number of times of scanning on one screen, that is, the number of times of scanning on the scan electrodes, 8b. ≪ / RTI >

9A and 9B, a plurality of scan electrodes formed on one plasma display panel is divided into two scan electrode groups. However, it is also possible to make the number of the scan electrode groups different from those shown in FIG. 9A. 10A.

FIGS. 10A and 10B are views for explaining a third embodiment of the non-signal mode scanning change in the plasma display apparatus according to another embodiment of the present invention.

Referring to FIG. 10A, a plurality of scan electrodes Y can be divided into an A scan electrode group 610, a B scan electrode group 620, a C scan electrode group 630, and a D scan electrode group 640.

For example, the A scan electrode group 610 may include scan electrodes from the Y ₁ scan electrode to the Y ₂₅ scan electrode, and the B scan electrode group 620 may include scan electrodes from the Y ₂₆ scan electrode to the Y ₅₀ scan electrode The C scan electrode group 630 may include Y ₅₁ scan electrodes to Y ₇₅ scan electrodes and the D scan electrode group 640 may include Y ₇₆ scan electrodes to Y _It can be divided into up to ₁₀₀ scan electrodes. When the total number of the scan electrodes Y is k (k is a natural number), the number of the scan electrode groups is 2? K? (k + 1).

Here, it is preferable that the scan order of all the scan electrodes Y included in one scan electrode group is continuous.

In FIG. 10B, the duplicated description that has been described so far will be omitted. A signal is supplied to all the frames, and the fourth frame will be described in Fig. 10B.

10 (a), the A scan electrode group can be scanned in the first sub-field of the first frame, the B scan electrode group can be scanned in the second sub-field of the first frame, The C scan electrode group can be scanned in the third subfield, and finally the D scan electrode group can be scanned in the fourth subfield of the first frame. The same procedure can be repeated thereafter.

In the second frame, the B scan electrode group can be scanned in the first subfield, the C scan electrode group can be scanned in the second subfield, the D scan electrode group can be scanned in the third subfield, And the A scan electrode group can be scanned in the fourth subfield. The same procedure can be repeated thereafter.

In the third frame, the C scan electrode group can be scanned in the first subfield, the D scan electrode group can be scanned in the second subfield, the A scan electrode group can be scanned in the third subfield, And the B scan electrode group can be scanned in the fourth subfield. The same procedure can be repeated thereafter.

In the fourth frame, the D scan electrode group can be scanned in the first subfield, the A scan electrode group can be scanned in the second subfield, the B scan electrode group can be scanned in the third subfield, And the C scan electrode group can be scanned in the fourth subfield. The same procedure can be repeated thereafter.

In addition to this method, the A scan electrode group can be scanned in the first frame, the B scan electrode group can be scanned in the second frame, the C scan electrode group can be scanned in the third frame, , And scan the D scan electrode group in the fourth frame. In other words, the frame can be scanned in the order of dividing the scan electrode group.

As described above, when a signal is supplied to the plurality of scan electrode groups in an interlace manner, the number of times of scanning on one screen, that is, the number of times of scanning the scan electrodes, can be further reduced. .

In the meantime, although the number of the scan electrodes Y included in each scan electrode group is the same as the number of the scan electrodes Y, the present invention is not limited thereto. The scan electrodes Y included in at least one of the plurality of scan electrode groups Y may be different from the other scan electrode groups.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

It should be understood, therefore, that the embodiments described above are to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than the foregoing description, And all changes or modifications derived from equivalents thereof should be construed as being included within the scope of the present invention.

As described above, the plasma display apparatus according to an embodiment of the present invention further improves the stability of the plasma display panel and the circuit using the improved interlace method in the no-signal mode.

In addition, the plasma display device according to an embodiment of the present invention has an effect of alleviating a component stress test problem by using an improved interlace method in a non-signal mode.

Claims (9)

A plasma display panel for displaying an image in a frame including a plurality of subfields; A driving unit for increasing one frame to a plurality of frames in a no signal mode; And a plasma display panel. The method according to claim 1, The driving unit Wherein the plurality of frames are divided into a plurality of frames each having one or more subfields divided in the non-signal mode. The method according to claim 1, The driving unit And wherein one of the frames is divided into two consecutive frames having the same number of subfields in the non-signal mode. A plasma display panel having a plurality of scan electrodes; A driving unit for scanning a plurality of scan electrodes in a plurality of frames in a no signal mode, And a plasma display panel. 5. The method of claim 4, The driving unit Wherein at least one scan electrode group of the plurality of scan electrode groups including at least one scan electrode among the plurality of scan electrodes scan in another frame. 5. The method of claim 4, The driving unit And scanning the same number of scan electrodes in each of the plurality of frames. 5. The method of claim 4, Wherein the frame includes a < th > frame and a < th > The driving unit Wherein the even-numbered scan electrodes among the plurality of scan electrodes are scanned in the a-th frame, and odd-numbered scan electrodes are scanned in the a + 1 frame. 5. The method according to any one of claims 1 to 4, Wherein the non-signal mode is a mode in which the input of a video signal from the outside is blocked or a voltage of a video signal is lower than a threshold voltage. 9. The method of claim 8, Wherein the threshold voltage is 40 dB or less.

Images