KR20110041845A - Multi plasma display panel device - Google Patents

Abstract

PURPOSE: A multi-plasma display device is provided to reduce the brightness variation on an image by setting different sustain numbers of a sustain signal applied to one or more of plasma display panels. CONSTITUTION: A plurality of driving units(310,320,330,340) drive a plurality of plasma display panels(210,220,230,240), respectively. The plasma display panels are located in contact with each other and display an image by dividing the image using a plurality of subfields including a reset period, an address period, and a sustain period. The driving units output brightness values(APL1~APL4) on the divided images, share and compare the brightness values, and apply a driving signal based on a different brightness value to one or more of the plasma display panels.

Description

Multi plasma display panel device

The present invention relates to a multi-plasma display device, and more particularly, to a multi-plasma display device that is easy to prevent deterioration of image quality of one image displayed on a plurality of plasma display panels.

In general, a plasma display device (hereinafter referred to as a “PDP”) is a flat panel display device that displays an image using plasma discharge, and has a high response speed and is suitable for displaying a large area image. And indoor / outdoor advertising displays.

In the plasma display apparatus, first and second electrodes formed on the effective area of the upper substrate and a third electrode intersecting the first and second electrodes are formed on the lower substrate, and one partition wall is formed between the upper substrate and the lower substrate. And a plasma display panel constituting a discharge cell of which contains a main discharge gas such as neon (Ne), helium (He), or a mixture of neon and helium (Ne + He) and a small amount of xenon. Inert gas is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because a thin and light configuration is possible.

In recent years, a multi-plasma display apparatus is under study for preventing a large luminance deviation from occurring in each of a plurality of plasma display panels when displaying the same luminance.

An object of the present invention is to provide a multi-plasma display device that is easy to prevent the deterioration of the image quality of one image displayed in a plurality of plasma display panels.

The multi-plasma display apparatus of the present invention includes a plurality of plasma display panels connected to each other and a plurality of driving units for driving the plurality of plasma display panels, respectively, wherein the plurality of plasma display panels include a reset period, an address period, One image is divided and displayed by a plurality of subfields including a sustain period, and a sustain signal applied to at least one of the plurality of plasma display panels is different in at least one sustain period.

In the multi-plasma display apparatus of the present invention, by varying the number of sustain signals of the sustain signals applied to at least one of the plurality of plasma display panels, the luminance variation with respect to one image displayed in the plurality of plasma display panels can be reduced, thereby improving image quality. This has the advantage of being improved.

In addition, the multi-plasma display device of the present invention stabilizes wall charges accumulated by reset discharge by varying the maximum voltage of the reset signal or the number of reset signals applied to at least one of the plurality of plasma display panels. There is an advantage that can prevent erroneous discharge.

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

1 is a schematic view showing a multi-plasma display device according to the present invention.

Referring to FIG. 1, in the multi-plasma display apparatus 100, the first to fourth plasma display apparatuses A, B, C, and D are connected to each other in the first and second core regions seam1 to seam2. You will implement a large screen.

Here, each of the first to fourth plasma display apparatuses A, B, C, and D constitutes a split screen through individual operations when an image is implemented, and the first to fourth plasma display apparatuses A, B, C, and D are configured. ) Controls the other plasma display device.

That is, each of the first to fourth plasma display devices A, B, C, and D constitutes an individual driver (not shown).

The seam areas seam1 to seam2 are formed to have the same width, and it is preferable that the seam areas seam1 to seam2 do not exist as much as possible.

FIG. 2 is a perspective view illustrating a structure of a plasma display panel included in the first to fourth plasma display devices shown in FIG. 1.

Referring to FIG. 2, the plasma display panel includes a scan electrode 11, a sustain electrode 12, and an address electrode 22 formed on the lower substrate 20, which are pairs of sustain electrodes formed on the upper substrate 10. It includes.

The sustain electrode pairs 11 and 12 typically include transparent electrodes 11a and 12a and bus electrodes 11b and 12b formed of indium tin oxide (ITO), and the bus electrodes 11b and 12b. ) May be formed of a metal such as silver (Ag), chromium (Cr) or a stack of chromium / copper / chromium (Cr / Cu / Cr) or a stack of chromium / aluminum / chromium (Cr / Al / Cr). The bus electrodes 11b and 12b are formed on the transparent electrodes 11a and 12a to serve to reduce voltage drop caused by the transparent electrodes 11a and 12a having high resistance.

Meanwhile, according to the first embodiment of the present invention, the sustain electrode pairs 11 and 12 have not only a structure in which the transparent electrodes 11a 12a and the bus electrodes 11b and 12b are stacked, but also without the transparent electrodes 11a and 12a. Only the bus electrodes 11b and 12b may be constituted. This structure does not use the transparent electrodes (11a, 12a), there is an advantage that can lower the cost of manufacturing the panel. The bus electrodes 11b and 12b used in this structure may be various materials such as photosensitive materials in addition to the materials listed above.

Light between the scan electrodes 11 and the sustain electrodes 12 between the transparent electrodes 11a and 12a and the bus electrodes 11b and 11c to absorb external light generated outside the upper substrate 10 to reduce reflection. Black stripes (black matrix, BM, 15) are arranged that serve to block and to improve the purity and contrast of the upper substrate 10.

The black stripe 15 according to the present invention is formed on the upper substrate 10. The first black stripe 15, the transparent electrodes 11a and 12a and the bus electrode are formed at positions overlapping the partition wall 21. It may be composed of second black stripes 11c and 12c formed between 11b and 12b. Here, the first black stripes 15 and the second black stripes 11c and 12c, which are also referred to as black layers or black electrode layers, may be simultaneously formed and physically connected in the formation process, or may not be simultaneously connected to each other. .

In addition, when physically connected and formed, the first black stripes 15 and the second black stripes 11c and 12c may be formed of the same material, but may be formed of different materials when they are physically separated.

The upper dielectric layer 13 and the passivation layer 14 are stacked on the upper substrate 10 having the scan electrode 11 and the sustain electrode 12 side by side. Charged particles generated by the discharge are accumulated in the upper dielectric layer 13, and the protective electrode pairs 11 and 12 may be protected. The protective film 14 protects the upper dielectric layer 13 from sputtering of charged particles generated during gas discharge, and increases emission efficiency of secondary electrons.

In addition, magnesium oxide (MgO) may be generally used for the protective film 14, and Si-MgO to which silicon (Si) is added may be used.

Here, the content of silicon (Si) added to the protective film 14 may be 60PPM to 200PPM based on the weight percent.

On the other hand, the address electrode 22 is formed in the direction crossing the scan electrode 11 and the sustain electrode 12. In addition, the lower dielectric layer 23 and the partition wall 21 are formed on the lower substrate 20 on which the address electrode 22 is formed.

In addition, the phosphor layer 23 is formed on the surfaces of the lower dielectric layer 24 and the partition wall 21. The partition wall 21 has a vertical partition wall 21a and a horizontal partition wall 21b formed in a closed shape, and physically distinguishes discharge cells, and prevents ultraviolet rays and visible light generated by the discharge from leaking into adjacent discharge cells.

In addition to the structure of the partition wall 21 shown in FIG. 2 of the present invention, the structure of the partition wall 21 of various shapes will be possible. For example, a channel in which a channel usable as an exhaust passage is formed in at least one of the differential partition structure, the vertical partition 21a, or the horizontal partition 21b having different heights of the vertical partition 21a and the horizontal partition 21b. A grooved partition structure having a groove formed in at least one of the type partition wall structure, the vertical partition wall 21a, or the horizontal partition wall 21b may be possible.

Here, in the case of the differential partition wall structure, the height of the horizontal partition wall 21b is more preferable, and in the case of the channel partition wall structure or the groove partition wall structure, it is preferable that a channel is formed or the groove is formed in the horizontal partition wall 21b. something to do.

In the present invention, although the R, G and B discharge cells are shown and described as being arranged on the same line, it may be arranged in other shapes. For example, a Delta type arrangement in which R, G, and B discharge cells are arranged in a triangular shape may be possible. In addition, the shape of the discharge cell may be not only rectangular, but also various polygonal shapes such as a pentagon and a hexagon.

In addition, the phosphor layer 23 emits light by ultraviolet rays generated during gas discharge to generate visible light of any one of red (R), green (G), and blue (B). Here, an inert mixed gas such as He + Ze, Ne + Ze, and He + Ne + Ze for discharging is injected into the discharge space provided between the upper / lower substrates 10 and 20 and the partition wall 21.

FIG. 3 is a schematic diagram showing an electrode arrangement of the plasma display panel shown in FIG. 2.

Referring to FIG. 3, the plurality of discharge cells constituting the plasma display panel are preferably arranged in a matrix form as shown in FIG. 2. The plurality of discharge cells are provided at the intersections of the scan electrode lines Y1 to Ym, the sustain electrode lines Z1 to Zm, and the address electrode lines Z1 to Zn, respectively. The scan electrode lines Y1 to Ym may be driven sequentially or simultaneously, and the sustain electrode lines Z1 to Zm may be driven simultaneously. The address electrode lines Z1 to Zn may be driven by being divided into odd-numbered lines and even-numbered lines, or sequentially driven.

Since the electrode arrangement shown in FIG. 3 is only a first embodiment of the electrode arrangement of the plasma panel according to the present invention, the present invention is not limited to the electrode arrangement and driving method of the plasma display panel shown in FIG. 3. For example, a dual scan method in which two scan electrode lines among the scan electrode lines Y1 to Ym are simultaneously scanned is possible. In addition, the address electrode lines Z1 to Zn may be driven by being divided up and down or left and right in the center portion of the panel.

FIG. 4 is a timing diagram for a method of time division driving by dividing one frame into a plurality of subfields for driving the plasma display panel shown in FIG. 2.

The unit frame may be divided into a predetermined number, for example, eight subfields SF1, ..., SF8 to realize time division gray scale display. Each subfield SF1, ... SF8 is divided into a reset section (not shown), an address section A1, ..., A8 and a sustain section S1, ..., S8.

According to the present invention, the reset period may be omitted in at least one of the plurality of subfields. For example, the reset period may exist only in the first subfield or may exist only in a subfield about halfway between the first subfield and all the subfields.

In each address section A1, ..., A8, a display data signal is applied to the address electrode Z, and a scan pulse corresponding to each scan electrode Y is sequentially applied.

In each of the sustain periods S1, ..., S8, a sustain pulse is alternately applied to the scan electrode Y and the sustain electrode Z to form wall charges in the address periods A1, ..., A8. Sustain discharge occurs in the discharge cells.

The luminance of the plasma display panel is proportional to the number of sustain discharge pulses in the sustain discharge periods S1, ..., S8 occupied in the unit frame. When one frame forming one image is represented by eight subfields and 256 gradations, each subfield in turn has different sustains at a ratio of 1, 2, 4, 8, 16, 32, 64, and 128. The number of pulses can be assigned. In order to obtain luminance of 133 gradations, cells may be sustained by addressing the cells during the subfield 1 section, the subfield 3 section, and the subfield 8 section.

The number of sustain discharges allocated to each subfield may be variably determined according to weights of the subfields according to the APC (Automatic Power Control) step. That is, in FIG. 3, a case in which one frame is divided into eight subfields has been described as an example. However, the present invention is not limited thereto, and the number of subfields forming one frame may be variously modified according to design specifications. Do. For example, a plasma display panel may be driven by dividing one frame into eight or more subfields, such as 12 or 16 subfields.

The number of sustain discharges allocated to each subfield can be variously modified in consideration of gamma characteristics and panel characteristics. For example, the gray level assigned to subfield 4 may be lowered from 8 to 6, and the gray level assigned to subfield 6 may be increased from 32 to 34.

FIG. 5 is a timing diagram illustrating a drive signal for driving the plasma display panel shown in FIG. 2.

The subfield is a wall formed by a pre-reset section and a pre-reset section for forming positive wall charges on the scan electrodes Y and negative wall charges on the sustain electrodes Z. It may include a reset section for initializing the discharge cells of the entire screen by using the charge distribution, an address section for selecting the discharge cells, and a sustain section for maintaining the discharge of the selected discharge cells. have.

The reset section includes a setup section and a setdown section. In the setup section, rising ramp waveforms (Ramp-up) are simultaneously applied to all scan electrodes to generate fine discharges in all discharge cells. Thus, wall charges are generated. In the set down period, a falling ramp waveform (Ramp-down) falling at a positive voltage lower than the peak voltage of the rising ramp waveform (Ramp-up) is simultaneously applied to all the scan electrodes (Y), thereby erasing and discharging the discharge cells. Is generated, thereby eliminating unnecessary charges during wall charges and space charges generated by the setup discharges.

In the address period, a scan signal having a negative scan voltage Vsc is sequentially applied to the scan electrode, and a positive data signal is simultaneously applied to the address electrode Z. The address discharge is generated by the voltage difference between the scan signal and the data signal and the wall voltage generated during the reset period, thereby selecting the cell. On the other hand, in order to increase the efficiency of the address discharge, a sustain bias voltage Vzb is applied to the sustain electrode during the address period.

During the address period, the plurality of scan electrodes Y may be divided into two or more groups, and scan signals may be sequentially supplied to each group, and each of the divided groups may be further divided into two or more subgroups and sequentially by the subgroups. Scan signals can be supplied. For example, the plurality of scan electrodes Y is divided into a first group and a second group, and scan signals are sequentially supplied to scan electrodes belonging to the first group, and then scan electrodes belonging to the second group Scan signals may be supplied sequentially.

The plurality of scan electrodes Y according to the present invention may be divided into a first group located at an even number and a second group located at an odd number according to a position formed on a panel. In another embodiment, the panel may be divided into a first group located above and a second group located below the center of the panel.

The scan electrodes belonging to the first group divided by the above method are further divided into a first subgroup located at an even number and a second subgroup located at an odd number, or the first group. The first subgroup positioned above and the second group positioned below may be divided based on the center of the.

In the sustain period, a sustain pulse having a sustain voltage Vs is alternately applied to the scan electrode and the sustain electrode to generate sustain discharge in the form of surface discharge between the scan electrode and the sustain electrode.

The width of the first sustain signal or the last sustain signal among the plurality of sustain signals alternately supplied to the scan electrode and the sustain electrode in the sustain period may be greater than the width of the remaining sustain pulses.

After the sustain discharge occurs, an erase period for erasing the wall charge remaining in the scan electrode or the sustain electrode of the selected ON cell in the address period by generating a weak discharge may be further included after the sustain period.

The erase period may be included in all or some of the plurality of subfields, and the erase signal for the weak discharge is preferably applied to the electrode to which the last sustain pulse is not applied in the sustain period.

The cancellation signal is a ramp-type signal that gradually increases, a low-voltage wide pulse, a high-voltage narrow pulse, an eZponential signal, or half. Sinusoidal pulses can be used.

In addition, a plurality of pulses may be sequentially applied to the scan electrode or the sustain electrode to generate the weak discharge.

The driving waveforms shown in FIG. 5 are a first embodiment of signals for driving the plasma display panel according to the present invention. The present invention is not limited to the waveforms shown in FIG. 5. For example, the pre-reset period may be omitted, and the polarity and the voltage level of the driving signals illustrated in FIG. 5 may be changed as necessary. After the sustain discharge is completed, an erase signal for erasing wall charge may be applied to the sustain electrode. May be authorized. In addition, the single sustain driving may be performed by applying the sustain signal to only one of the scan electrode (Y) and the sustain (Z) electrode to generate a sustain discharge.

The driving section of the plasma display panel may be divided into a power-on sequence section and a normal operation section. The waveforms of the driving signals supplied from the power-on sequence section and the normal operation section may be the same or different as necessary.

That is, when power is supplied to the plasma display device (Power ON), a power-on for preparing a normal operation of the device without displaying an image on the panel for a predetermined time or until the driving voltage to be supplied to the panel reaches a normal level. A power on sequence is performed. Thereafter, the image is displayed by the driving signals supplied to the panel in the normal operation section.

In addition, even before the power supply to the plasma display device is cut off, a power on sequence similar to the power on sequence exists to smoothly terminate the power supply to the driving circuit or the panel.

For example, during a predetermined time after power is supplied to the plasma display device, the data signal is not applied to the panel because the display enable signal has a value of "0" which is a low level. , No image is displayed on the panel. After the predetermined time has elapsed, if the disabling enable signal has a value of "1" which is a high level, the data signal is applied to the panel, and the image is displayed on the panel. In addition, during a predetermined time before the power supply to the plasma display device is terminated, the disabling enable signal again has a low level of "0", and thus no image is displayed on the panel.

6 is a control block diagram illustrating an embodiment of a configuration of a multi-plasma display apparatus according to the present invention.

Referring to FIG. 6, the multi-plasma display device drives the first to fourth plasma display panels 210, 220, 230, and 240 and the first to fourth plasma display panels 210, 220, 230, and 240, respectively. The first to fourth driving unit 310, 320, 330, 340 is included.

Here, the first to fourth plasma display panels 210, 220, 230, and 240 display the first to fourth divided images obtained by dividing one image.

The first to fourth driving units 310, 320, 330, and 340 calculate first to fourth luminance values APL1 to APL4 for the first to fourth divided images, respectively, to be input to the first to fourth drivers. The first to fourth driving signals are applied to the first to fourth plasma display panels 210, 220, 230, and 240 according to the luminance values APL1 to APL4.

Here, the first to fourth driving units 310, 320, 330, and 340 may share and compare the first to fourth luminance values APL1 to APL4 through communication with each other.

That is, when the first to fourth driving units 310, 320, 330, and 340 represent one image with the same gray level, the first to fourth driving units 310, 320, 330, and 340 may have the highest luminance value and the lowest luminance value among the first to fourth luminance values APL1 to APL4. If the deviation is greater than or equal to the set value, either the highest luminance value or the lowest luminance value is changed to the fifth luminance value APL5.

Herein, the first to fourth driving units 310, 320, 330, and 340 are fifth based on at least one of the first to fourth plasma display panels 210, 220, 230, and 240 based on the fifth luminance value APL5. Apply the drive signal.

For example, the first to fourth luminance values APL1 to APL4 of the first to fourth divided images input from the first to fourth driving units 310, 320, 330, and 340 may be 350, 400, If the set value is 400, the first driver 310 receives the second to fourth luminance values APL2 to APL4 from the second to fourth drivers 320, 330, and 340. The deviation between the third luminance value APL3 that is the maximum luminance value and the first luminance value APL1 that is the minimum luminance value is compared.

In this case, the first driver 310 has a deviation of 450 between the first luminance value APL1 and the third luminance value APL3. Here, the first driver 310 sets the set value to 400 so that the deviation between the first luminance value APL1 and the third luminance value APL3 is higher than the set value, so that the first luminance value APL1 or the third luminance value is increased. Any one of the luminance values APL3 is changed to the fifth luminance value APL5.

In this case, the first driver 310 generates the second and fourth driving signals by the second and fourth drivers 320 and 340 according to the second luminance value APL2 and the fourth luminance value APL. It is applied to the plasma display panels 220 and 340.

The first driver 310 converts the first luminance value APL1 having a small deviation from the second and fourth luminance values APL2 and APL4 into a fifth luminance value APL5 to the third driver 330. To pass.

Accordingly, the third driver 330 varies the third luminance value APL3 to the fifth luminance value APL5 and applies the fifth driving signal to the third plasma display panel 230.

However, when the deviation of the first to fourth luminance values APL1 to APL4 is less than the set value, the first driver 310 calculates the number of sustain signals according to the first to fourth luminance values APL1 to APL4, respectively. The first and fourth plasma display panels 210, 220, 230, and 240 are applied to the first to fourth plasma display panels.

Here, the first to fourth luminance values APL1 to APL4 are average image levels APL, and the number of sustain signals included in the first to fourth driving signals varies according to the average image level APL.

In this case, the fifth luminance value APL5 is any one of a maximum value, a minimum value, and an average value of the first to fourth luminance values APL1 to APL4.

That is, the first to fourth plasma display panels 210, 220, 230, and 240 may implement at least one sustain period in realizing one image by a plurality of subfields including a reset period, an address period, and an address period. Since luminance deviations of the first to fourth divided images are generated according to the number of sustain signals applied to the plurality of sustain signals, the same number of sustain signals are applied to at least two plasma display panels so that the luminance deviation does not occur above the set value. As a result, the image quality of the image may be reduced by reducing the flicker of the image quality of the luminance variation of each of the first to fourth plasma display panels 210, 220, 230, and 240, or the generation of the dark or light plasma display panel in the form of a checkerboard. Will improve.

In addition, the first to fourth driving units 310, 320, 330, and 340 may display the first to fourth driving signals in which the maximum voltage or number of reset signals applied in at least one reset period is varied. By applying to (210, 220, 230, 240), the light by the reset discharge can be adjusted, and the amount of accumulated charge can be adjusted.

As such, the first to fourth driving units 310, 320, 330, and 340 calculate the fifth luminance value APL5 when the deviation of the first to fourth luminance values APL1 to APL4 is greater than or equal to the set value. The same luminance is generated by applying a fifth driving signal including the number of the sustain signals for the fifth luminance value APL5 to at least one of the first to fourth plasma display panels 210, 220, 230, and 240. The luminance deviation between the first to fourth plasma display panels 210, 220, 230, and 240 may be reduced.

In the present embodiment, at least one of the first to fourth driving units has been described as comparing the first to fourth luminance values calculated by each, but there may be a configuration for comparing the first to fourth luminance values.

7 is a timing diagram illustrating a first embodiment of a drive signal applied to a multi-plasma display device according to the present invention.

FIG. 7A illustrates a first driving signal applied to the first plasma display panel 210 in the sustain period S of the Nth subfield when the first luminance value APL1 illustrated in FIG. 6 is 350. FIG. .

FIG. 7B illustrates the second driving signal applied to the second plasma display panel 220 in the sustain period S of the Nth subfield when the second luminance value APL2 illustrated in FIG. 6 is 400. FIG. .

FIG. 7C illustrates a third driving signal applied to the third plasma display panel 230 in the sustain period S of the Nth subfield when the third luminance value APL3 illustrated in FIG. 6 is 800. FIG. .

FIG. 7D illustrates a fourth driving signal applied to the fourth plasma display panel 240 in the sustain period S of the Nth subfield when the fourth luminance value APL4 illustrated in FIG. 6 is 380. .

Here, when the first driver 310 is described as a reference, the first driver 310 compares whether the deviation between the maximum luminance value and the minimum luminance value among the first to fourth luminance values APL1 to APL4 is equal to or greater than a set value.

That is, the first driving unit 310 calculates the fifth luminance value APL5 by comparing the first and third luminance values APL1 and APL3 with a deviation greater than the set value 400.

In this case, the first driver 310 varies the first luminance value APL1 to the fifth luminance value APL5, and transfers the fifth luminance value APL5 to the third driver 330, thereby driving the fifth driving signal. Is applied to the third plasma display panel 230.

7E illustrates a fifth driving signal in which the fifth luminance value APL5 equal to the first luminance value APL1 is 350, and replaces the third driving signal shown in FIG. 7C with the fifth driving signal. The driving signal is applied to the third plasma display panel 330.

In the present embodiment, the fifth luminance value is described as the lowest luminance value among the first to fourth luminance values, and the maximum luminance value is changed to the lowest luminance value, but the whole may be varied.

In addition, it is preferable that the number of sustain signals applied to each of the first to fourth plasma display panels 210, 220, 230, and 240 be maintained below a set threshold.

That is, the first to fourth plasma display panels 210, 220, 230, and 240 may have at least one sustain signal having a different number of sustains corresponding to the first to fourth luminance values APL1 to APL4 at the same luminance. When the sustain number difference of each sustain signal is applied below the threshold value, the luminance difference between the first to fourth divided images may be minimized to improve the quality of the first to fourth divided images.

8 is a timing diagram illustrating various embodiments of a fifth driving signal according to the present invention.

FIG. 8 illustrates a fifth driving signal in which at least one signal width among the sustain signals according to the fifth luminance value APL5 shown in FIG. 7 is different.

That is, FIG. 8 (a) shows that the widths of the plurality of sustain signals may have a value of 2 or more, for example, the signal width w1 of the first sustain signal among the plurality of sustain signals, and the signal of the remaining sustain signals. It may be larger than the width w2.

8 (a) shows that the signal width w1 of the first sustain signal is larger than the signal width w2 of the second sustain signal, thereby stably performing the sustain discharge of the first sustain signal even when the positive wall charge is lost before the sustain period. can do. In addition, when the first sustain discharge is stably performed, subsequent sustain discharges may also be stably performed.

FIG. 8 (b) shows that when the maximum voltage Vst_1 of the reset signal applied in the reset period is smaller than the previous maximum voltage Vst, erroneous discharge due to reset discharge can be prevented, and wall charges accumulated by reset discharge are prevented. Stabilization of can be achieved.

8 (c) applies a sustain signal between the first sustain signal and the second sustain signal. At this time, the signal width w1 of the first sustain signal is larger than the signal width w2 of the second and subsequent sustain signals, which has the characteristics as shown in FIG.

However, a sustain signal is applied between the first sustain signal and the second sustain signal, and the signal width w1 of the sustain signal is equal to the signal width w1 of the first sustain signal, thereby applying a sustain signal to the neighboring electrode. Sustain erroneous discharge caused by interference can be prevented, and wall charges caused by the first sustain discharge can be stabilized.

8 (d) shows that the signals of FIG. 8 (b) and 8 (c) are mixed.

Although not shown in FIG. 8, the number of reset signals may vary.

In addition, although the preferred embodiment of the present invention has been shown and described above, the present invention is not limited to the specific embodiments described above, but the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

1 is a schematic view showing a multi-plasma display device according to the present invention.

FIG. 2 is a perspective view illustrating a structure of a plasma display panel included in the first to fourth plasma display devices shown in FIG. 1.

FIG. 3 is a schematic diagram showing an electrode arrangement of the plasma display panel shown in FIG. 2.

FIG. 4 is a timing diagram for a method of time division driving by dividing one frame into a plurality of subfields for driving the plasma display panel shown in FIG. 2.

FIG. 5 is a timing diagram illustrating a drive signal for driving the plasma display panel shown in FIG. 2.

6 is a control block diagram illustrating an embodiment of a configuration of a multi-plasma display apparatus according to the present invention.

7 is a timing diagram illustrating a first embodiment of a drive signal applied to a multi-plasma display device according to the present invention.

8 is a timing diagram illustrating various embodiments of a fifth driving signal according to the present invention.

Claims (7)

And a plurality of driving units for driving the plurality of plasma display panels and the plurality of plasma display panels which are connected to each other. The plurality of plasma display panels divide and display one image by a plurality of subfields including a reset period, an address period, and a sustain period. And a sustain signal applied to at least one of the plurality of plasma display panels in at least one sustain period is different. The method of claim 1, wherein the sustain signal, A multi-plasma display device, characterized in that the signal width is different. The method of claim 2, wherein the sustain signal, And at least one of the signal width of the first sustain signal or the signal width of the last sustain signal is longer than the signal width of the remaining sustain signal. The method of claim 1, wherein the sustain signal, A multi-plasma display device, characterized in that the number of sustains is different. The method of claim 1, wherein at least one of the sustain signals, A multi-plasma display device, characterized in that the maximum voltage is different. The method of claim 1, In at least one of the reset periods, at least one of the plurality of plasma display panels, And a maximum voltage of the reset signal or the number of the reset signals is different. The method of claim 1, The number of sustain differences between the plurality of sustain signals applied to the plurality of plasma display panels is A multi-plasma display device, characterized in that less than the set threshold.

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