KR20040050976A - Driving method for decreasing address period in plasma display panel - Google Patents

Abstract

PURPOSE: A method for reducing write period in driving PDP is provided to realize a PDP such as a high definition television(HDTV) at a high resolution by drastically reducing the time for addressing. CONSTITUTION: A method for driving a plasma display panel for reducing the write period includes the steps of: dividing one frame of the image information into a plurality of sub-frames so as to display a predetermined image information on an AC-PDP; and inserting the initialization period, a writing period and a sustain period into each of the sub-frames. The AC-PDP is provided with a plurality of sustain electrodes, a plurality of address electrodes perpendicular to the sustain electrodes and a plurality of discharge cells formed at the cross points between the sustain electrodes and the address electrodes.

Description

A method of driving a plasma display panel for shortening the writing period {DRIVING METHOD FOR DECREASING ADDRESS PERIOD IN PLASMA DISPLAY PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of driving an AC plasma display panel (PDP) for shortening a writing period, and more particularly, to generate a priming discharge between a scan electrode and a sustain electrode corresponding thereto. In addition, since the priming effect of the space charge generated through the priming discharge in the discharge cells connected to the scan electrode adjacent to the scan electrode can speed up the generation of the address discharge, the scan time can be shortened and the scan that caused the priming discharge is generated. Disclosed is a method of driving a plasma display panel in which discharge cells connected to electrodes can write data through erasing discharge, thereby enabling stable writing while shortening the writing period as a whole.

The present invention relates to a method of driving an AC type PDP. First, the panel structure of the AC type PDP is shown in a perspective view in FIG. As shown in the figure, a panel of an AC-type PDP has a plurality of scan electrodes Y and a discharge sustain electrode X placed on a plate glass in parallel with each other, a top dielectric layer 8 is formed thereon, and a protective layer 9 thereon. A reflective layer is formed on the lower electrode dielectric layer 5 on the address electrode A and the address electrode A formed in a direction perpendicular to the upper plate 1 and the scan electrode Y and the discharge sustain electrode X. In order to distinguish each cell, the partition wall 3 is formed in parallel with the address electrode A, and the lower plate 2 is formed with a fluorescent film 4 emitting visible light on the side and bottom surfaces of the partition wall 3. After evacuating between the upper plate 1 and the lower plate 2, the discharge space between the upper plate 1 and the lower plate 2 is filled with a binary or ternary inert gas containing xenon gas, The scan electrode Y of the upper plate 1 and the discharge sustain electrode X and the address electrode A of the lower plate 2 cross each other. One cell is formed at the site, and three cells of red, green, and blue are combined to form one pixel for displaying a color image.

In the case of the AC PDP, as shown in FIG. 2, eight subfields having different brightnesses are provided for one TV field (= 16.7 ms) representing an image for 256-gradation representation, and each subfield is again initialized and an address period. (Or writing period) and discharge sustain period. That is, each of the subfields has a length of discharge sustaining periods corresponding to 2 ⁰ , 2 ¹ , 2 ² , 2 ³ , 2 ⁴ , 2 ⁵ , 2 ⁶ , 2 ⁷ , and a combination of these subfields. 256 (= 2 ⁸ ) gray scales can be expressed.

The initialization period is a process of equalizing the wall charge states of all cells, and in addition to erasing the information of the previous image, the initial conditions of all cells are made the same so that subsequent address discharges can occur under the same conditions. . In the subsequent address period, a discharge is generated between the scan electrodes Y and the address electrodes A that are orthogonal to each other in each of the cells in order to select cells to be turned on and cells to be turned off to display an image according to an image signal. Positive wall charges are formed on the electrode Y, and negative wall charges are formed on the address electrode A, respectively. In the subsequent sustain period, sustain discharge is continued only for the cells turned on in the address period. The discharge sustain voltage lower than the discharge start voltage is applied between the scan electrode (Y) and the discharge sustain electrode (X) so that the wall charge is discharged through the discharge between the scan electrode (Y) and the address electrode (A) in the address period. Only the formed cells are allowed to sustain discharge.

In the driving process, the address period is usually larger than the time taken by the discharge sustain period in the time occupied by one TV field, which is a major cause of decreasing the brightness of the PDP, considering that the actual PDP luminance is proportional to the discharge sustain period. It has been. In particular, in the case of high resolution, such as in HD TV, the number of scan electrodes (Y) is increased, so that the time required for the address becomes longer, and the discharge sustain period is relatively decreased, and thus the luminance is significantly reduced.

In order to solve the above problem, the conventional technology has used a so-called double scan method in which the address electrode A of the lower plate is divided into two top and bottom and input image signals separately as shown in FIG. 3. However, in the dual scan method, since the image signal must be input to the upper and lower address electrodes A, the driver IC required to drive the address electrodes A needs to be doubled, which leads to a price increase. have.

As another conventional technique for solving such a problem, as shown in FIG. 4, wall charges are transferred onto the scan electrode (Y) and the address electrode (A) by using a ramp type voltage that gradually changes the applied voltage during the initialization period. Although there is a method to accumulate as much as possible to discharge the address quickly, this method is still not satisfactory to achieve an address time of less than 1us per line suitable for driving a PDP of HD resolution.

The present invention has been made to solve the above problems, and unlike the conventional driving method of the PDP, a priming discharge is generated between one scan electrode and a sustain electrode corresponding thereto, and a discharge connected to the scan electrode adjacent to the scan electrode. The priming effect of the space charge generated through the priming discharge in the cells can speed up the generation of the address discharge, thereby shortening the writing time, and in the discharge cells connected to the scan electrode which generated the priming discharge, the data is erased through the erase discharge. The present invention provides a method of driving a plasma display panel which enables writing to be performed so that stable writing can be performed while shortening the writing period as a whole.

1 is a view illustrating a structure of an AC plasma display panel (PDP) applied to the present invention.

2 is an illustration of a time division diagram of a drive waveform of an AC PDP.

3 is an example showing the arrangement of a scan electrode and a sustain electrode of the prior art.

4 is an example of a prior art drive waveform.

5A is a view schematically showing a driving waveform to explain a driving method according to an embodiment of the present invention.

FIG. 5B illustrates the waveforms applied to each scan line during the even line scan write process in FIG. 5A.

FIG. 6 is an example of electrode placement on a panel for driving using the drive waveforms of the embodiment of FIG. 5.

7 is a diagram for explaining a discharge delay time.

8 is a result of measuring a discharge delay time according to an address voltage in a conventional driving method.

9 is a result of measuring address discharge delay time for each scan line according to a conventional driving method.

10 is a schematic diagram of wall charge behavior analysis for understanding panel operation when a driving method according to an exemplary embodiment of the present invention is applied.

11A is a schematic diagram showing that the result of shortening the discharge delay time of the even lines was measured while changing the priming time of the odd lines.

FIG. 11B shows the effect of shortening the discharge delay time by the secondary discharge of the odd lines in the even lines measured as shown in FIG. 11A in the embodiment of the present invention.

12A shows the discharge delay time distribution of even lines in the above embodiment of the present invention.

12B shows the discharge delay time distribution of odd lines in the above embodiment of the present invention.

Fig. 13 shows a schematic view of panel electrode arrangement according to another modified embodiment of the present invention.

14 is a schematic view showing a panel electrode arrangement according to another modified embodiment of the present invention.

15 shows a panel electrode arrangement schematic according to another modified embodiment of the present invention.

16 is a schematic diagram showing a case where the contrast ratio is improved by applying an active filter to the panel.

<Explanation of symbols for the main parts of the drawings>

1: top plate 8: top dielectric layer

2: lower plate 9: protective layer

3: bulkhead 4: fluorescent film

5: lower dielectric layer Y: scan electrode

X: discharge sustain electrode A: address electrode

A driving method of a plasma display panel according to an aspect of the present invention includes a plurality of scan electrodes and a plurality of sustain electrodes corresponding to each of the scan electrodes, and a plurality of address electrodes orthogonal to the scan electrodes and the scan electrodes. And dividing one frame of the image information into a plurality of subframes in order to display predetermined image information on an AC plasma display panel including a plurality of discharge cells formed at respective points orthogonal to the address electrodes. Each subframe is a driving method of an AC plasma display including an initialization period, a writing period, and a sustain period, wherein the scan electrodes are divided into a first group and a second group, and one or more subframes of the subframes. In one of the first groups A priming step of causing a priming discharge between the sustain electrode and the sustain electrode corresponding thereto; A discharge pulse is selected by applying a scan pulse to one scan electrode adjacent to the scan electrode in which the priming discharge is generated among the scan electrodes of the second group, and emits light during the sustain period among the discharge cells connected to the scan electrode. A normal writing step of writing data between the address electrode of the cells and the scan electrode by generating a high speed write discharge using the priming effect by the priming discharge; And a scan pulse is applied to the scan electrodes in which the priming discharges are generated in the first group to select the scan electrodes, and among the discharge cells connected to the scan electrodes, the address electrodes of the discharge cells that do not emit light during the sustain period, and the And an erase write step of writing data by generating an erase discharge between the scan electrodes.

Preferably, the driving method of the plasma display according to the present invention includes an inversion step of inverting the polarities of the wall charges of the discharge cells connected to the scan electrodes of the first group and the scan electrodes of the second group after the normal writing step. It may further include.

A driving method of a plasma display according to another aspect of the present invention includes a plurality of scan electrodes and a plurality of sustain electrodes corresponding to each of the scan electrodes, a plurality of address electrodes orthogonal to the scan electrodes, and the scan. In order to display predetermined image information on an AC plasma display panel including a plurality of discharge cells formed at respective points orthogonal to the electrodes and the address electrodes, one frame of the image information is divided into a plurality of subframes. And each subframe includes an initialization period, a writing period, and a sustain period, wherein the scan electrodes are divided into a first group and a second group, and one or more sub-frames of the subframes. In the writing period of a frame, (i) any of the first groups A priming step of causing a priming discharge between the can electrode and a sustain electrode corresponding thereto, and (ii) a scan pulse is applied to one scan electrode adjacent to the scan electrode in which the priming discharge is generated among the second group of scan electrodes to scan the scan electrode; Selecting an electrode and writing data by generating a fast write discharge using the priming effect by the priming discharge between the scan electrode and the address electrode of the discharge cells which should emit light during the sustain period among the discharge cells connected to the scan electrode (A) a second group writing step of performing a normal writing step sequentially for all the scan electrodes of the second group; And (i) applying a scan pulse to the scan electrodes in which the priming discharges are generated in the first group to select the scan electrodes, and the addresses of the discharge cells that should not emit light during the sustain period of the discharge cells connected to the scan electrodes. (B) a first group writing step of sequentially performing an erase writing step of writing data by generating an erasing discharge between an electrode and the scan electrode for all the scan electrodes of the first group, respectively.

Preferably, the driving method of the plasma display of the present invention, after the second group write step, inverts the polarity of the wall charge of the discharge cells connected to the scan electrode of the first group and the scan electrode of the second group. A reversal step may be further included.

Preferably, in the inverting step of the driving method of the plasma display of the present invention, the potentials of the scan electrodes of the first group and the scan electrodes of the second group are made to be more positive than the potentials of the sustain electrodes corresponding to the scan electrodes. It is done.

Preferably, in the priming step of the method of driving a plasma display, the potential of the sustain electrode corresponding to the scan pulse is applied to the scan electrodes of the first group, more than the potential at the time when the initialization period ends. A positive discharge is caused to rise between the scan electrode and the sustain electrode, and in the normal writing step, a scan pulse is applied to the scan electrode of the second group while the potential of the sustain electrode corresponding thereto is changed. It is characterized by maintaining the potential at the end of the point.

Preferably, in the erase writing step of the driving method of the plasma display of the present invention, the scan electrode of the second group is maintained at a constant potential without applying a scan pulse, and the sustain electrode of the first group has a ground potential. The erase discharge may occur in the selected discharge cell according to the data to be applied and written.

Preferably, the driving method of the plasma display according to the present invention is characterized in that the first discharge sustain pulse is applied to the sustain electrode at the beginning of the sustain period after the end of the write period.

Preferably, the driving method of the plasma display according to the present invention is characterized in that the pulse voltage applied to the address electrode in the normal writing step has a different voltage value from the pulse voltage applied to the address electrode in the erase writing step. It is done.

Preferably, in the driving method of the plasma display of the present invention, the first group consists of odd-numbered scan lines, and the second group consists of even-numbered scan lines.

In still another aspect of the present invention, there is provided a plasma display driving apparatus including a plurality of scan electrodes and a plurality of sustain electrodes corresponding to the scan electrodes, and a plurality of address electrodes orthogonal to the scan electrodes. In order to display predetermined image information on an AC plasma display panel including a plurality of discharge cells formed at respective points perpendicular to the scan electrode and the address electrode, one frame of the image information is divided into a plurality of subframes. And each subframe includes an initialization period, a writing period, and a sustain period, wherein the scan electrodes are divided into a first group and a second group, and one or more of the subframes. During the writing period of the sub-frame, the first group of words. Priming means for causing a priming discharge between a scan electrode and a sustain electrode corresponding thereto; A discharge pulse is selected by applying a scan pulse to one scan electrode adjacent to the scan electrode in which the priming discharge is generated among the scan electrodes of the second group, and emits light during the sustain period among the discharge cells connected to the scan electrode. Normal writing means for writing data between the address electrode of the cells and the scan electrode by generating a high speed write discharge using the priming effect by the priming discharge; And a scan pulse is applied to the scan electrodes in which the priming discharges are generated in the first group to select the scan electrodes, and among the discharge cells connected to the scan electrodes, the address electrodes of the discharge cells that do not emit light during the sustain period, and the Erase writing means for writing data by generating an erase discharge between the scan electrodes.

According to still another aspect of the present invention, a plasma display device includes a plurality of scan electrodes and a plurality of sustain electrodes corresponding to each of the scan electrodes, a plurality of address electrodes orthogonal to the scan electrodes, and the scan electrodes. And an AC plasma display panel including a plurality of discharge cells formed at respective points at which the address electrodes are perpendicular to each other, and a plurality of frames of the image information for displaying predetermined image information on the plasma display panel. An AC plasma display device including a driving device which is divided into sub-frames and each sub-frame is driven to include an initialization period, a writing period, and a sustain period, wherein the scan electrodes are divided into a first group and a second group. The driving device is one of the sub-frames. In or during the address period of the sub-frame or more, the priming means to cause priming discharge between the first sustain electrode to be any one of scan and a corresponding group of electrodes; A discharge pulse is selected by applying a scan pulse to one scan electrode adjacent to the scan electrode in which the priming discharge is generated among the scan electrodes of the second group, and emits light during the sustain period among the discharge cells connected to the scan electrode. Normal writing means for writing data between the address electrode of the cells and the scan electrode by generating a high speed write discharge using the priming effect by the priming discharge; And a scan pulse is applied to the scan electrodes in which the priming discharges are generated in the first group to select the scan electrodes, and among the discharge cells connected to the scan electrodes, the address electrodes of the discharge cells that do not emit light during the sustain period, And erase write means for writing data by generating erase discharge between the scan electrodes.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

In this embodiment, the address period (or write period) is divided into two parts as shown in Fig. 5A, and the periods for the addresses of the even lines and the odd lines are set separately. First, when an even line is addressed, priming discharge is first generated between the scan electrode (Y) and the discharge sustaining electrode (X) at an odd line on one of the even lines to be scanned first to generate charged particles. When the corresponding even lines are addressed due to charged particles, address discharge occurs quickly. In addition, when the odd lines are addressed, the address is erased selectively to only the cells to which data is to be erased by using the odd lines pre-discharged for the address of the even numbered lines. Present a technique to shorten. Waveforms applied to even and odd lines during the addressing of even lines are illustrated in detail in FIG. 5B. In the scan waveform of odd lines for priming, the width and timing of the applied pulses can be controlled to optimize the address discharge of even lines.

For this driving, as shown in FIG. 5, the discharge sustaining electrode X is divided into two types as shown in FIG. 5A shows a waveform inducing a discharge between the scan electrode (Y) and the discharge sustain electrode (X) for an odd line directly above the even line to be scanned to obtain a priming effect by charged particles when scanning the even line. And as shown in Figure 5b.

When scanning odd lines, unlike the scanning of even lines above, addressing is performed through erasing discharge, not addressing through normal write discharge, in order to shorten the scan time. In the case of the odd lines, since all the discharge cells connected to the odd lines have already been discharged once in order to cause the priming discharge at the address of the even lines, the part where the video signal is not supplied according to the data (that is, the OFF cells). By selectively performing the address through erasing discharge only, the time required for the address can be drastically reduced, so that an address time suitable for driving a high resolution HD PDP can be satisfied.

In order to understand the operation of the embodiment of the present invention, first, the discharge delay time of the address discharge, which is an important factor in determining the address time, will be described. In all discharges, the discharge phenomenon is statistical. That is, even when a voltage higher than the discharge start voltage is applied from the outside, the discharge is not always started at a predetermined time, but the timing at which the discharge is started depends on the initial state of the cell.

In general, when the discharge start voltage is applied, if the charged particles are sufficiently present in the cell, the charged particles are accelerated by the electric field, collide with nearby neutral particles, and ionization occurs again due to the collision. Finally, discharge occurs through a series of processes called electron avalanches where newly generated and newly created charged particles are accelerated back into the electric field and cause ionization again.

However, if sufficient charged particles do not exist inside the cell when the discharge start voltage is applied, the discharge does not start even after a certain time. That is, a difference occurs in the time taken from the time of applying a voltage externally to the time of starting the discharge, depending on the amount of charged particles required for the discharge to occur. This time is called the discharge delay time. If you look at this time again, it can be divided into two types as follows.

The first is the discharge formation delay time (t _f ). As described above, when a voltage above the discharge start voltage is applied from the outside and sufficient charged particles are present, the charged particles are accelerated by this electric field, cause ionization, and this process is repeated. In the end, it refers to the time taken to start discharging. The second is the time it takes for the charged particles to exist in the cell to generate a discharge. This is called the statistical delay time (t _s ) of the discharge. That is, as shown in FIG. 7, the sum of the discharge formation delay time t _f and the statistical delay time t _s of the discharge is a discharge delay time t _{d generally} described.

This discharge delay time t _d determines the time required to scan one line, and therefore, it is possible to shorten this discharge delay time t _d in order to shorten the address period. The discharge formation delay time t _f constituting this discharge delay time t _d and the statistical delay time t _s of the discharge depend on the intensity of the electric field and the amount of charged particles applied from the outside, and the correlation between them Experimental results showing the effect of the electric field strength and the priming effect of the charged particles on the discharge delay time confirming the results are shown in FIGS. 8 and 9, respectively.

8 illustrates the change in the discharge delay time due to the address voltage applied from the outside, and it can be seen that the discharge delay time decreases as the applied voltage increases. However, in this case, as the voltage is increased, the saturation characteristics of the delay time are slowed down. Therefore, this method alone has a limit in reducing the discharge delay time.

9 is a measurement of the delay time of the address discharge according to the time from the initialization discharge to the scan. As shown in the figure, the discharge delay is short for several decades immediately after the initialization, but as the scan time is delayed, the discharge delay time is delayed. You can see that this is getting longer. This is due to the effect of charged particles, and there are many charged particles inside the cell immediately after the initialization discharge, which helps the discharge to occur quickly when the address discharge occurs even for the same address voltage. Is considered to be because it does not help address discharge. Thus, the discharge promoting effect of space charge is called a priming effect.

Therefore, it can be seen that the address period can be significantly reduced if the charged particles that assist the generation of the address discharge can be continuously supplied during the address period as a method for reducing the discharge delay time of the address discharge. To this end, in the related art, an additional auxiliary electrode is added to generate charged particles in advance, and a method of generating address discharge at a high speed by using a priming effect by the charged particles has been selected. In this case, as the number of electrodes increases due to the addition of a separate auxiliary electrode, the panel manufacturing process is complicated, and due to the increase in manufacturing price due to a circuit added to drive the auxiliary electrode, it is difficult to be applied to actual products. I had a problem.

Accordingly, in the present invention, in the method of continuously supplying the charged particles during the address period in order to reduce the discharge delay time of the address discharge, the same effect is achieved by utilizing the existing electrode without adding a separate auxiliary electrode to generate the charged particles. It was intended to be shown. To this end, the scan line is divided into one or more groups, so that one group serves to supply priming particles to the scan lines of the other one or more groups. For example, as in the case of FIGS. 5A and 5B, the scan lines are divided into even lines and odd lines, so that the scan of the even lines and the odd lines is performed separately and the even lines are different from the conventional continuous scan method. Before the scan of, the charge is generated by generating discharge in advance through the odd line on the top of the even line.

FIG. 10 illustrates the behavior of the wall charges to understand the operation of the discharge cell when the driving waveform is applied to the panel in the embodiment of FIG. 5. The angle of the driving waveform of FIG. 5 is divided into even and odd lines. Each operation situation at the time will be described.

First, all the cells have a wall charge state as shown in Fig. 10 (1) immediately after the initialization discharge. That is, negative charges are accumulated on the scan electrodes Y, and positive charges are accumulated on the discharge sustain electrodes X and the address electrodes A, respectively. In this state, before even-numbered lines are scanned in the address period, even-numbered lines can be scanned by generating a discharge as shown in Fig. 10 (2) between the scan electrodes Y and the discharge sustain electrodes X of the corresponding odd-numbered lines. At this time, the charged particles necessary for the start of the address discharge are supplied in advance. Next, as shown in FIG. 10 (3), an address discharge occurs between the scan electrode Y and the address electrode A in the even lines. Subsequently, in FIG. 10 (4), both even and odd lines generate a discharge between the scan electrode Y and the discharge sustain electrode X so that the wall charge is in the state shown in FIG. This process of (4) inverts the polarity of the wall charge for the next odd line scan.

In this way, when the address of the even line ends, the address of the odd line starts, and as described above, since the odd line has already been discharged once for the purpose of priming discharge during the even line scan, the cell to be turned off for the address In other words, so-called erase addressing for selectively erasing discharge is performed on a line-by-line basis only (discharge cells that are OFF cells, depending on the data to be written). In the case of erasure addressing, the wall charge state between cells is relatively the same compared to the write addressing, and the wall voltage due to the wall charge is added to the externally applied voltage, so that the time required for the address is short.

In the case of the even lines, since no scan pulse is applied in the scan of the odd lines, no discharge occurs as shown in the figure, and the wall charge state previously formed is maintained as it is. As described above, when the address period ends, the discharge sustain period begins. At this time, an initial pulse is applied to the discharge sustain electrode X as shown in FIG. Since the pulse for inverting the wall charge state was applied to the scan electrode Y between the scan lines of the even and odd lines during the address period, the initial pulse of the discharge sustain period must be applied to the discharge sustain electrode X. It matches the wall charge state formed inside. Subsequent discharge sustain operations are the same as those in the conventional drive waveform.

Next, when the driving waveform of the present invention is actually applied, the shortening effect of the actual discharge delay time is shown in FIGS. 11A and 11B due to the priming effect of the charged particles during scanning of even lines. As can be seen in FIG. 11B, the time for generating priming discharge between the scan electrode Y and the discharge sustain electrode X in the odd lines, that is, the pulse width of the even lines is significantly reduced by appropriately adjusting the pulse width. It can be seen that.

12A and 12B show an address discharge delay time when addressing even and odd lines according to the present invention, and it can be seen that the address discharge delay time is significantly reduced compared to the conventional address discharge delay time. This result is due to the two effects that the address discharge is accelerated by the priming discharge in the even lines, and the address time is shortened by the selective erase discharge in the odd lines. Therefore, when the driving method of the present invention is used, since the address time per scan line can be shortened to 1 us or less as shown in Fig. 12, the driving method of the present invention is particularly suitable for driving high resolution TVs.

In addition, in the case of using the driving method of the present invention, in addition to the advantages of high-speed driving, as the time required for the address period in one TV field is drastically reduced, the time allotted to the discharge sustain period is relatively increased, thereby increasing the luminance. In addition, the number of subfields can be increased as compared with the conventional case, which can greatly contribute to reducing moving picture contour noise, thereby providing a high quality image.

Although one specific embodiment has been described in order to facilitate understanding of the technical idea of the present invention, this is merely exemplary and various modifications are possible without departing from the scope of the technical idea of the present invention. to be. For example, the scan electrodes must be classified into even lines and odd lines, among which the odd lines are used for the priming effect, the even lines are first scanned, and the odd lines are then scanned using erase discharge. Alternatively, as shown in FIG. 13, an odd scan line may be first modified by installing an extra scan line at the top (Y0) and supplying priming particles to the first scan line using the same scan line. . In the case of the first scan line, the priming effect due to the initialization action remains because the interval is not large in time with the initialization period, so there is no problem even if a separate odd electrode is not provided as shown in FIG. In the exemplary embodiment, there may be no problem even without adding the extra redundant scan line Y0. However, in order to ensure a more priming effect, a separate odd line may be provided as shown in FIG.

One alternative embodiment is shown in FIG. 14. In the case of Fig. 14, the 3n-1 &lt; th &gt; scan line such as 2, 5, ..., 242, ..., 479 is used as an electrode for causing a priming effect, and priming discharge is generated using this electrode. In this case, the upper and lower scan lines are first addressed using the priming particles generated therefrom, and then the upper and lower scan lines are addressed. In this case, the addressing process may be performed on the 3n-th scan line after performing an address process on the 3n-2th scan line while generating a priming discharge on the center 3n-1th scan line. In this case, since the priming discharge is generated once and the effect is used in the two scan lines, the number of priming discharges can be reduced, and the contrast ratio of the screen can be expected to be improved as compared to the embodiment of FIG. 5.

In addition, it can be classified into 4n-3, 4n-2, 4n-1, and 4n, and one of the scan lines can be used to generate a priming discharge, and can be used to speed up the addressing process on the remaining scan lines. Subdivision is possible as much as possible.

The principle of subdivision can be any number of ways other than those listed above. For example, some of the panels may be classified as odd lines and even lines, others as multiples of three, or may be classified as a mixture of various principles. Eventually, the scan line is classified into one or more groups and one of the scan lines is used for supplying priming particles for speeding up the address discharge of the other one or more groups to perform an addressing process on the scan lines of the other group, It is reasonable to consider that the scan lines that have generated the priming discharges are included in the scope of the technical idea of the present invention as long as the address process by the selective erase discharge is performed thereafter.

In the case of FIG. 15, as another modification, relatively early address discharge can be expected due to the priming effect caused by the initialization discharge for the scan line which is first scanned after the initialization process is completed. This is a modification in the case where the driving method of the present invention is applied only to the lines scanned after a time elapses.

FIG. 16 is another embodiment of the present invention. As a problem that may be caused in the application of the driving method of the present invention, the contrast ratio may be lowered due to light emission by the auxiliary discharge of the odd lines for causing the priming effect. In order to prevent this, an active filter is installed in front of the panel in synchronization with the driving pulse to transmit only the light emission in the discharge sustain period and to block the light emission in the other period.

The configuration of the active filter is schematically shown in FIG. In the active filter, light incident to the filter is blocked when there is a voltage applied by using the photoelectric effect of the liquid crystal material, and light incident on the filter is transmitted as it is when no voltage is applied. Therefore, the voltage ratio applied to the filter is applied only to the initialization period and the address period in synchronization with the driving waveform, and the voltage is not applied during the discharge sustain period, so that unnecessary light is blocked during the initialization period and the address period, thereby improving the contrast ratio. can do.

In addition to the various embodiments described above, many other modifications may exist, and it is obvious that the technical elements constituting the modifications may be regarded as equivalent means as long as they have the same function as the contents disclosed in the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by the equivalents of the claims.

By using the driving method of the present invention, it is possible to drastically reduce the time required for addressing, which enables high-resolution PDP driving such as HDTV. It is easy to allocate the driving time, thereby realizing high quality PDP.

Claims (12)

A plurality of scan electrodes and a plurality of sustain electrodes corresponding to each of the scan electrodes, a plurality of address electrodes orthogonal to the scan electrodes, and a plurality of scan electrodes formed at respective points orthogonal to the scan electrodes In order to display predetermined image information on an AC plasma display panel including discharge cells, one frame of the image information is divided into a plurality of subframes, each subframe including an initialization period, a writing period, and a sustaining period. In the drive method of the AC plasma display, The scan electrodes are divided into a first group and a second group, In a writing period of one or more subframes of the subframes, A priming step of causing a priming discharge between the scan electrode of the first group and the sustain electrode corresponding thereto; A discharge pulse is selected by applying a scan pulse to one scan electrode adjacent to the scan electrode in which the priming discharge is generated among the scan electrodes of the second group, and emits light during the sustain period among the discharge cells connected to the scan electrode. A normal writing step of writing data between the address electrode of the cells and the scan electrode by generating a high speed write discharge using the priming effect by the priming discharge; And A scan pulse is applied to the scan electrodes in which the priming discharges are generated in the first group to select the scan electrodes, and among the discharge cells connected to the scan electrodes, the address electrodes and the scan electrodes of the discharge cells that should not emit light during the sustain period. And an erase writing step of writing data by generating an erase discharge between the electrodes. The method of claim 1, And reversing the polarity of wall charges of the discharge cells connected to the scan electrodes of the first group and the scan electrodes of the second group after the normal writing step. A plurality of scan electrodes and a plurality of sustain electrodes corresponding to each of the scan electrodes, a plurality of address electrodes orthogonal to the scan electrodes, and a plurality of scan electrodes formed at respective points orthogonal to the scan electrodes In order to display predetermined image information on an AC plasma display panel including discharge cells, one frame of the image information is divided into a plurality of subframes, each subframe including an initialization period, a writing period, and a sustaining period. In the drive method of the AC plasma display, The scan electrodes are divided into a first group and a second group, In a writing period of one or more subframes of the subframes, (i) a priming step of causing a priming discharge between the scan electrodes of the first group and the sustain electrodes corresponding thereto; (ii) selecting a scan electrode by applying a scan pulse to a scan electrode adjacent to the scan electrode in which the priming discharge is generated among the scan electrodes of the second group, and emitting light during the sustain period among the discharge cells connected to the scan electrode; A normal writing step of writing data by generating a high-speed write discharge using the priming effect by the priming discharge between the address electrodes of the discharge cells to be performed and the scan electrodes is sequentially performed for all the scan electrodes of the second group, respectively. Performing (A) a second group writing step; And (i) address electrodes of discharge cells that apply a scan pulse to the scan electrodes in which the priming discharges are generated in the first group to select the scan electrodes, and which do not emit light during the sustain period among the discharge cells connected to the scan electrodes; Performing an erase write step of writing data by generating an erase discharge between the scan electrodes and the scan electrodes, sequentially for all the scan electrodes of the first group, respectively. (B) including a first group write step Driving method of plasma display. The method of claim 3, wherein And reversing the polarity of wall charges of the discharge cells connected to the scan electrodes of the first group and the scan electrodes of the second group after the second group writing step. The method according to claim 2 or 4, And in the inverting step, the potentials of the scan electrodes of the first group and the scan electrodes of the second group are more positive than the potentials of the sustain electrodes corresponding to the scan electrodes of the first group. The method according to claim 1 or 3, In the priming step, while applying a scan pulse to the scan electrode of the first group, the potential of the sustain electrode corresponding to the scan electrode is increased more positively than the potential at the time when the initialization period ends, thereby between the scan electrode and the sustain electrode. Causing priming discharge on And in the normal writing step, a scan pulse is applied to the scan electrodes of the second group, and the potential of the sustain electrode corresponding thereto is maintained at the potential at the end of the initialization period. The method according to claim 1 or 3, In the erase write step, the scan electrodes of the second group are maintained at a constant potential without a scan pulse applied thereto. And the sustain electrode of the first group is configured to cause erasing discharge in a selected discharge cell according to data to be written with a ground potential applied thereto. The method according to claim 1 or 3, And a first discharge sustain pulse is applied to a sustain electrode at the beginning of the sustain period after the writing period ends. The method according to claim 1 or 3, And the pulse voltage applied to the address electrode in the normal writing step has a different voltage value from the pulse voltage applied to the address electrode in the erasing writing step. The method according to claim 1 or 3, The first group consists of odd scan lines. And wherein said second group is of even-numbered scan lines. A plurality of scan electrodes and a plurality of sustain electrodes corresponding to each of the scan electrodes, a plurality of address electrodes orthogonal to the scan electrodes, and a plurality of scan electrodes formed at respective points orthogonal to the scan electrodes In order to display predetermined image information on an AC plasma display panel including discharge cells, one frame of the image information is divided into a plurality of subframes, each subframe including an initialization period, a writing period, and a sustaining period. In a drive device of an alternating current plasma display, The scan electrodes are divided into a first group and a second group, During a writing period of one or more subframes of the subframes, Priming means for causing priming discharge between any one of the scan electrodes of the first group and a sustain electrode corresponding thereto; A discharge pulse is selected by applying a scan pulse to one scan electrode adjacent to the scan electrode in which the priming discharge is generated among the scan electrodes of the second group, and emits light during the sustain period among the discharge cells connected to the scan electrode. Normal writing means for writing data between the address electrode of the cells and the scan electrode by generating a high speed write discharge using the priming effect by the priming discharge; And A scan pulse is applied to the scan electrodes in which the priming discharges are generated in the first group to select the scan electrodes, and among the discharge cells connected to the scan electrodes, the address electrodes and the scan electrodes of the discharge cells that should not emit light during the sustain period. And erasing writing means for writing data by generating an erasing discharge between the electrodes. A plurality of scan electrodes and a plurality of sustain electrodes corresponding to each of the scan electrodes, a plurality of address electrodes orthogonal to the scan electrodes, and a plurality of scan electrodes formed at respective points orthogonal to the scan electrodes An alternating current plasma display panel including discharge cells, In order to display predetermined image information on the plasma display panel, a drive device is divided into one frame of the image information into a plurality of subframes, and each subframe includes an initialization period, a writing period, and a sustain period. In the AC plasma display device comprising: The scan electrodes are divided into a first group and a second group, The driving device may further include: during the writing period of one or more of the sub-frames, Priming means for causing priming discharge between any one of the scan electrodes of the first group and a sustain electrode corresponding thereto; A discharge pulse is selected by applying a scan pulse to one scan electrode adjacent to the scan electrode in which the priming discharge is generated among the scan electrodes of the second group, and emits light during the sustain period among the discharge cells connected to the scan electrode. Normal writing means for writing data between the address electrode of the cells and the scan electrode by generating a high speed write discharge using the priming effect by the priming discharge; And A scan pulse is applied to the scan electrodes in which the priming discharges are generated in the first group to select the scan electrodes, and among the discharge cells connected to the scan electrodes, the address electrodes and the scan electrodes of the discharge cells that should not emit light during the sustain period. And erasing-writing means for writing data by generating an erasing discharge between the electrodes.