JP2000066635A - Driving method of plasma display device - Google Patents

Abstract

(57) [Problem] To provide a plasma display device capable of displaying a bright image with little noise. SOLUTION: In a three-electrode surface discharge type plasma display device provided with an X sustain electrode and a Y sustain electrode, an X voltage to be supplied to the X sustain electrode is applied to the Y sustain electrode at time points T1, T2, T3 and T4. These are supplied as pulses in accordance with the application timing of the scan pulse. [Effect] Since crosstalk due to address discharge is suppressed, noise can be reduced and the area of the sustain electrode can be increased, so that a brighter image can be displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a three-electrode surface discharge type plasma display device, and more particularly to a plasma display device suitable for displaying a color image.

[0002]

2. Description of the Related Art A plasma display device is a PDP (plasma display).
It is also called a (display panel), which literally has a panel shape and can easily respond to a large screen.Therefore, in recent years, it has attracted attention as a wall-mounted television receiver and a multimedia display device. , There is a lot of hope.

Therefore, an example of this PDP will be described below with reference to FIGS. 4 to 6 of the drawings. First, in these figures, 1 is a front glass substrate, 2 is a rear glass substrate, and 1 is a front glass substrate. Is on the image display surface side.

First, a front glass substrate 1 has an inner surface,
That is, on the lower surface in FIG. 4 and FIG. 5, the X sustain electrode (X sustain electrode) 3 and the Y sustain electrode (Y sustain electrode) 4 in the form of a stripe formed of a thin film of a transparent conductive material are provided. Are formed in pairs. Further, bus electrodes 20 made of a metal material are added to the X sustaining electrode 3 and the Y sustaining electrode 4 along their longitudinal directions, respectively. It is intended to make up for the shortage.

The X sustain electrode 3 and the Y sustain electrode 4
The following may be simply referred to as an X electrode and a Y electrode, or may be simply referred to as a sustain electrode. The surfaces of the X sustaining electrode 3 and the Y sustaining electrode 4 are
A dielectric layer 5 made of a predetermined material is provided so as to be entirely covered.

The back glass substrate 2 has an inner surface,
That is, the stripe-shaped address electrode 6 made of a thin film of a conductive material is provided on the upper surface in FIGS.
However, a plurality of the storage electrodes are provided so as to be perpendicular to the extension direction of the sustain electrodes. Note that these address electrodes 6 may be simply referred to as A electrodes hereinafter. Partition walls 8 are provided between the respective address electrodes 6, whereby the respective address electrodes 6 are individually partitioned. Then, the upper surfaces of the address electrodes 6, including the side surfaces of the partition walls 8, are formed of a fluorescent material. A dielectric layer 7 is provided.

As shown in FIG. 5, the front glass substrate 1 and the rear glass substrate 2 are overlapped and combined at an interval of about 100 μm determined by the height of the partition 8, and a discharge space therebetween. 9 is formed, and a mixed gas mainly containing neon (Ne), xenon (Xe), or the like is sealed therein. Therefore, when viewed from the front glass substrate 1 side, the arrangement state of each electrode is as shown in FIG.
It is shown as follows.

That is, the two X sustaining electrodes 3 and the Y sustaining electrodes 4 are arranged parallel to each other and alternately and horizontally from the upper panel to the lower panel, and the address electrodes 6 are arranged vertically. Then, a cell serving as a display pixel is formed at the intersection of the pair of the X sustain electrode 3 and the Y sustain electrode 4 and the address electrode 6. A PD having such an electrode structure
P is called a three-electrode surface-discharge type PDP, and such a PDP is described in, for example, Japanese Patent Application Laid-Open No. 7-3255.
No. 52 discloses this.

Next, a method of driving the three-electrode surface discharge type PDP will be described. In addition, also about this drive method,
There is a description in the above publication. First, in this PDP, as shown in FIG. 7, a display frame period 10 is divided into a plurality of subfields and driven. FIG. 7 shows an example in which the frame period 10 is 16.7 m.
In seconds, this frame period is divided into six subfields 11,
The subfields 11 to 16 are divided into 12, 13, 14, 15, and 16, respectively, and each of the subfields 11 to 16 includes a reset discharge period 17 and an address discharge period 1 as shown in the figure.
8, a sustain discharge period (sustain discharge period) 19.

Next, a waveform of a voltage applied to each electrode in one subfield period in this PDP will be described with reference to FIG. In this specification, the A voltage indicates a voltage applied to the A electrode, and hereinafter, the Y voltage indicates a voltage applied to the Y electrode, and the X voltage indicates a voltage applied to the X electrode. Express.

First, the reset discharge period 17 is a period for performing processing for preventing the influence of the discharge in the immediately preceding subframe. In this period, the reset discharge period 17 starts at a predetermined time point b after the start time point a and ends at a time point c. 340 V is applied to the X electrode, 0 V is applied to the Y electrode, and 70 V is applied to the A electrode.

As a result, a discharge occurs between the X and Y electrodes on the front surface of the panel, and a space charge is generated in the discharge space 9. Then, of the generated space charges, positive charges are attracted to the low-voltage Y electrode side and negative charges are attracted to the high-voltage X electrode side, and wall charges are formed on the dielectric layer 5.

When no voltage is applied at time point c, an electric field appears between the X and Y electrodes due to the wall charges on the dielectric layer 5, and as a result, a discharge occurs again and until the end time d of the period. Then, the wall charges on all the X electrodes and the Y electrodes are neutralized, and the reset discharge of the entire panel is completed.

Next, an address discharge period 18 is a period in which a process for selecting a pixel portion to be displayed, that is, a cell, is performed. In this period, the entire period from the start time d to the end time f, the X electrode and the For example, 70V and -70V are applied to the Y electrode.
Are applied respectively. In the meantime, at a predetermined time point e, according to the display information for each cell, a scan pulse (scan pulse) of, for example, -140 V is applied to the Y electrode in order from the top to the bottom of the panel, and 7
An address pulse of 0 V is applied.

As a result, at time point e, a voltage of 210 V is applied between the A electrode and the Y electrode, a discharge occurs, and wall charges are formed. Then, the voltage value and the width of the pulse applied at this time are made smaller than the voltage value and the width applied during the reset period so that the discharge does not occur again when the application of the pulse is completed. Accordingly, when wall charges are formed, the wall charges remain so as to remain after the time point f when the address discharge period 18 has elapsed.

The sustain discharge period 19 is a period in which a process for causing a selected portion to emit light is performed.
For example, 70 A is applied to the A electrode during the entire period from
Is applied to the X and Y electrodes, for example, 17
A rectangular wave sustaining voltage of 0 V is applied alternately while shifting the period. For this reason, it is called an AC drive type.

As a result, if a wall charge has been formed during the immediately preceding address discharge period 18, a discharge occurs due to the wall charge, which continues until the time point g when the sustain discharge period 19 ends. The phosphor constituting the dielectric layer 7 is excited, and a light-emitting display is obtained.

That is, a discharge occurs in a cell having a wall charge between the X and Y electrodes, but a sustain voltage having an appropriate voltage value is applied so that a discharge does not occur in a cell having no wall charge. In a cell in which wall charges are formed during the address discharge period, discharge is alternately repeated between the X and Y electrodes, and the display brightness of each cell, that is, the brightness, can be controlled according to the number of pulses of this discharge. it can.

Therefore, a multi-gradation display can be obtained by repeating the weighted subfields a required number of times during the sustain discharge period, and further, the discharges of the cells coated with the red, green, and blue phosphors are combined. As a result, color display with various colors can be obtained.

The control of the luminance at this time, that is, the gradation control will be described in more detail. As shown in FIG. 7, each of the subfields 11 to 16 has a length of the sustain discharge period 19.
(Time) is changed, and assuming that the length of the sustain discharge period 19 in the subfield 11 is 1, 2 in the subfield 12, 4 in the subfield 13, 8 in the subfield 14, 16 in the subfield 15, and In the subfield 16, it is set to 32.

Therefore, if the selection of subfields within one frame period is changed and the combination is changed, 64 (= 2 ⁶ ) types of light emission times can be selected in one frame period. When only the subfield 13 is selected, the luminance 1 is obtained. When the subfield 13 and the subfield 14 are selected, the luminance becomes 12 (4 + 8). Arbitrary brightness can be obtained up to 64, and multi-tone display can be obtained.

The prior art relating to the PDP is disclosed in JP-A-6-29811, JP-A-7-295506, JP-A-8-110513, JP-A-9-31661 and JP-A-9-31661. 9-31932
No. 8 can be mentioned.

[0023]

SUMMARY OF THE INVENTION The above prior art is based on PD
In P, sufficient consideration was not given to crosstalk (mutual interference) occurring between cells adjacent to each other along the address electrode direction at the time of address discharge, and there was a problem in improving display quality. As is well known, in a PDP, if the display screen size and the resolution (the number of pixels) are constant, the larger the area of the sustain electrode (sustain electrode), the greater the total amount of visible light generated, and the better the display luminance characteristics.

However, in the prior art, the length in the address electrode direction,
That is, when the electrode width is increased, the distance between the electrodes of adjacent cells, that is, the adjacent gap length is reduced, and the frequency of occurrence of crosstalk between cells is increased. The crosstalk between the cells is accompanied by a defective address discharge, generates noise, and significantly lowers the display quality.
As the brightness and definition of P have been increased, the problem has essentially become apparent as an essential problem for performance improvement.

Here, the details of the crosstalk between cells in the prior art will be described in each of two types of address discharge systems conventionally used. First,
The first address discharge method will be described. In this method, a voltage is commonly applied to the X electrodes, and address discharge is performed simultaneously in all cells along the address electrodes. In this case, FIG. As described above, during the address discharge period, all of the voltage A and the voltage X are set to a constant voltage of, for example, 70V.

As for the Y voltage, the Y1 voltage, the Y voltage
As shown as two voltages, a Y3 voltage, a Y4 voltage,..., A scan pulse whose voltage changes from -70V to -140V is applied in order from the top to the bottom of the panel. An address discharge is performed in the cell.

FIG. 10 shows the state in the cell at a certain time point T2 in FIG. 9. At this time, the address discharge ends up to the leftmost cell in the figure, and the next cell, ie, the left cell in the figure, Is in a state where an address discharge is occurring in the second cell from. At this time, in the leftmost cell of FIG.
Positive wall charges 21 are formed on the Y electrode 4 (Y1) of the dielectric layer 5,
Negative wall charges 22 are formed on the X electrode 3 (X1) and on the address electrode 6 of the dielectric layer 7 in the previous address discharge period.

In the second cell from the left, an address discharge 25 occurs, and the space charge 23,
The state where 24 occurs is shown. The potential of the plasma at this time is determined by the X voltage and the Y voltage, the A voltage, the work function of the material constituting the dielectric layers 5 and 6, and the reaction cross-sectional area of the sealed gas. Is approximately 40 to 50V.

Then, the voltage is applied to the electrode of the cell adjacent to the cell that is performing the address discharge, that is, the X electrode 3 (X1) of the leftmost cell in FIG. 7 and the Y electrode 4 (Y3) of the cell adjacent to the right. Assuming that the sum of the applied voltage and the voltage due to the wall charges is E, when this voltage E is lower than the potential of the plasma when the plasma density is maximized, the space charges 23 and 24 due to the plasma are addressed. No problem arises because it remains in the discharging cell.

Assuming that the above-mentioned sum voltage E becomes higher than the above-mentioned potential of the plasma, at this time, the plasma spreads to the adjacent cell, and the wall charge formed by the previous discharge is removed. This causes an effect such as cancellation, and as a result, crosstalk may occur.

At this time T2, the X electrode 3 (X
Since the voltage applied to 1), that is, the voltage X1 is 70 V, as is apparent from FIG. 9, if the wall voltage by the previous address discharge is approximately −20 V, the sum voltage E is the plasma potential. As a result, the plasma spreads to the position of the X electrode 3 (X1) in the left cell, and the negative wall charges 22 formed on the dielectric layers 5 and 7 are canceled out and become insufficient. Resulting in.

On the other hand, as is clear from FIG. 9, the voltage of the Y electrode (Y3) of the cell adjacent to the right at this time, that is, the Y3 voltage is -70 V, so that it is sufficiently lower than the plasma potential, and the space by the plasma of the address discharge. The charge does not spread to this cell. Such a mechanism of generating crosstalk in the PDP is considered to be a new finding by the present inventor, and therefore, the crosstalk by the above-described generating mechanism will be hereinafter referred to as first crosstalk. .

By the way, in the in PDP plasma made various excited atoms, in which, excited atoms of xenon Xe ^{* (3} P _1), the release of the ultraviolet 147nm by a transition from the excited state to the ground state Then, it is known that this ultraviolet light is absorbed by a nearby xenon atom and excites the xenon atom again, which causes a so-called self-absorption phenomenon.

Then, due to this phenomenon, the excited atom Xe ^* (
³ P ₁ ) diffuses slowly as an atom itself, but rapidly diffuses in an excited state. When the excited state is reached, it quickly diffuses into an adjacent cell. The excited atoms excited by adjacent cells Xe ^{* (3} P ₁₎ emits secondary electrons at the surface of the dielectric layer. At this time, a voltage of -70 V is applied as a Y voltage to the cells on both sides adjacent to the cell undergoing the address discharge,
Since a voltage of 70 V is applied to the A voltage, YA
The voltage between the electrodes is approximately equal to the firing voltage.

As a result, a weak discharge may be generated by using the voltage between the YA electrodes in the adjacent cells as a discharge seed. In FIG. 10, the weak discharge 26 is applied to the third cell from the left. The occurrence of is shown. When such a weak discharge 26 occurs, when the cell is to be subjected to an address discharge thereafter, the address discharge is not normally performed due to the wall charges due to the weak discharge 26 already generated, and the sustain discharge is stably performed. Crosstalk occurs in such a way that wall charges required for generation cannot be formed.

The frequency of occurrence of this crosstalk is not so high as compared with the first crosstalk described above. However, the mechanism of occurrence of such crosstalk in the PDP is a new finding by the present inventors. Therefore, this crosstalk will be hereinafter referred to as a second crosstalk.

Next, the case of the second address discharge method will be described. In this method, the X electrodes are divided into odd-numbered and even-numbered electrodes, the applied voltages are made common, and from the upper part of the panel to the lower part, By scanning the odd-numbered cells first and then scanning the even-numbered cells, the address discharge applied voltage waveform is as shown in FIG. Also in this case, as in the first address discharge method, address discharge is performed simultaneously in all cells along the address electrode. Therefore, during the address discharge period, the address voltage is constant at 70 V as shown in the figure. Value.

In the first half of the address discharge period, only the odd-numbered cells are subjected to address discharge. Therefore, the X voltage of the odd-numbered cells is set to, for example, 70 V, and the X voltage of the even-numbered cells is set to, for example, 0 V. Next, in the latter half of the address discharge period, only the even-numbered cells are subjected to the address discharge. Therefore, the X voltage of the odd-numbered cells is set to, for example, 0 V, and the X voltage of the even-numbered cells is set to, for example, 70 V.

Then, sequentially from a certain time T1, a time Tn
Until −1, the Y1 voltage and Y3
As shown as voltages,..., A scan pulse whose voltage changes from −70 V to −140 V in order from the top to the bottom of the panel is applied, and address discharge is performed in each cell. Next, after the time point Tn, as shown as Y2 voltage, Y4 voltage,... On the Y electrodes of the even-numbered cells, the voltages are sequentially reduced from the top of the panel to the bottom.
A scan pulse that changes from 70V to -140V is applied, and an address discharge is performed in each cell.

FIG. 12 shows a state in the cell at a certain time point T2 in FIG. 11. In this case, at the left end of the figure,
The address discharge ends at a certain odd-numbered cell, and the address discharge occurs in the next odd-numbered cell, that is, the third cell from the left in the figure. The voltage of the electrodes at both ends adjacent to the current cell, that is, the voltage of the X electrode 3 (X2) of the left adjacent cell, ie, X2
Since the voltage is 0 V and the voltage of the Y electrode 4 (Y4) of the right adjacent cell, that is, the Y4 voltage is -70V, it is sufficiently lower than the plasma potential. Therefore, in the case of the second address discharge method, the first crosstalk does not occur.

However, in the case of the second address discharge method, since the address discharge has not yet occurred in the cells on both sides of the cell that is performing the address discharge, the weak discharge 26 is generated in these two cells as described above. Occurs, and a second crosstalk occurs. However, as described above, the frequency of occurrence of the second crosstalk is not so high as compared with that of the first crosstalk.

Therefore, according to the second address discharge method, there are two types, that the first crosstalk does not occur and that the frequency of occurrence of the second crosstalk is lower than the frequency of occurrence of the first crosstalk. For this reason, better results can be obtained as compared with the first address discharge method described above.

However, as the definition of the PDP advances, the problem of image quality degradation due to the second crosstalk cannot be ignored. Therefore, in the prior art, even if the PDP is driven by using the second address discharge method, Even so, there is a problem in improving the display quality.

An object of the present invention is to provide a driving method of a plasma display device in which crosstalk is suppressed and display quality is sufficiently improved.

[0045]

An object of the present invention is to provide a three-electrode surface discharge system in which a plurality of sustain electrodes are formed by two electrodes, an X sustain electrode and a Y sustain electrode, which are arranged in parallel. In the plasma display device, at the time of address discharge, the X sustain electrodes and the Y sustain electrodes are driven at the same timing by scanning pulses having the same time width.

As a result, the voltage of the sustain electrodes on both sides closest to the cell that performs the address discharge between the address electrode and the Y sustain electrode can be made smaller than the plasma potential at the time when the plasma density is maximized by the address discharge. ,As a result,
Crosstalk can be suppressed.

[0047]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a driving method of a plasma display device according to the present invention will be described in detail with reference to the illustrated embodiments. FIG. 1 shows a first embodiment of the present invention.
A voltage applied to each electrode of the PDP during the address discharge is shown. The PDP itself to be applied and other driving methods are the same as those in the prior art described with reference to FIGS. Therefore, the detailed description is omitted.

As already described with reference to FIG. 9, in the first address discharge method according to the prior art, a voltage is commonly applied to the X electrodes, and the address discharge is simultaneously performed in all the cells along the address electrodes. During the address discharge period, the A voltage and all the X voltages are set to a constant voltage of, for example, 70 V, and only the Y voltage is, for example, from −70 V to −140 V in order from the top to the bottom of the panel.
, A scan pulse is applied so that an address discharge occurs in each cell.

However, in the first embodiment of the present invention, as shown in FIG. 1, during the address discharge period, the voltage A is kept at a constant voltage of 70 V, but the voltage X is kept at a constant voltage. Instead, it is changed by a scan pulse at the same timing as the Y voltage. That is, in this embodiment, during the address discharge period, like the Y voltage,
The X voltage is also configured to be changed by the scan pulse.

Therefore, for example, at a certain point in time T1, the Y1 voltage is changed from -70V to -140V by the scan pulse.
, The X1 voltage is simultaneously changed from the voltage 0 V to the voltage 70 V by the scan pulse, and this is sequentially performed at the time points T2, T3, T4 and all of the X voltage.

FIG. 2 shows the state in the PDP cell at time T2 in FIG. 1. At this time T2, the address discharge is completed up to the leftmost cell in the figure, and the next cell, that is, the second cell from the left, is discharged. It is assumed that the address discharge has started in the cell. At this time, the Y electrode 4 (Y1) of the leftmost cell
A positive wall charge 21 is applied to the surface of the dielectric layer 5 above the X electrode 3.
It is assumed that the negative wall charges 22 are formed on the upper surface of (X1) by the already completed address discharge.

Therefore, at this time, in the second cell from the left, plasma is generated by the address discharge 25, and space charges 23 and 24 are generated by this. In the case of this embodiment, the voltage of the X electrode 3 (X1) of the left cell adjacent to the cell that is performing the address discharge at the time T2 has already become 0, as is clear from FIG.
V, while the voltage on the Y electrode (Y3) of the right cell is still left at -70 V, so that both of these voltages are well below the plasma potential described above. ing.

As a result, even if space charges 23 and 24 are generated by the address discharge 25, they remain in the cells to which the address discharge has been performed. Talk can be prevented in principle. Further, in this case, since the cell on the left side of the cell undergoing the address discharge has already completed the address discharge, the possibility of the second crosstalk occurring in the cell on the left side can be eliminated.

On the other hand, in this case, since the address discharge has not yet been performed in the cell adjacent to the cell on the right side of the address discharge cell, there is a possibility that a weak discharge 26 (R) is generated as shown in FIG. , The second crosstalk due to this is inevitable. However, the frequency of occurrence of the second crosstalk in the right cell is considerably lower than the frequency of occurrence in the left cell as described below. Even if only the right side of the PDP remains, there is no possibility that a particular problem will occur in a high-definition PDP.

That is, this is also considered to be a new finding by the present inventor, but the address discharge of the PDP mainly occurs between the Y electrode and the A electrode, and the generated plasma is generated by the Y electrode and the X electrode. The Y electrode side of the cell comprising
That is, in FIG. 2, the center of the density distribution is on the left side of the cell, and as a result, as shown in the prior art of FIG. 12, for example, the intensity of the fine discharge is smaller than that of the right fine discharge 26 (R). 26 (L) is stronger.

As a result, the second crosstalk is also considered to be a new finding by the inventor of the present invention, but the frequency of occurrence differs between adjacent left and right cells, and relatively easily occurs in the adjacent cell on the left. However, in the cell to the right, this is not so much, but only a fairly low frequency. Also, as described above, the second crosstalk itself has a considerably lower frequency of occurrence than the first crosstalk itself, and therefore has a lower frequency of occurrence on the right side and is almost ignored. It will be about to gain.

Therefore, according to this embodiment, the occurrence of crosstalk is suppressed only to the right side of the second crosstalk, which is extremely infrequent, and as a result,
The occurrence of crosstalk can be sufficiently suppressed, and the PDP
Can easily cope with high definition.

According to this embodiment, suppression of crosstalk can be easily obtained only by changing the scan pulse waveform at the time of address discharge. Therefore, a PDP having excellent display quality, which is hardly affected by crosstalk, can be obtained. Can be easily provided. Furthermore, according to this embodiment, since the crosstalk is easily suppressed, the electrode width of the X electrode and the Y electrode can be made sufficiently large, and as a result, a brighter image can be displayed.

Next, another embodiment of the present invention will be described. FIG. 3 shows an address discharge applied voltage waveform according to the second embodiment of the present invention.
The X electrodes are divided into two groups, odd-numbered and even-numbered, so that scan pulses supplied to the X electrodes can be shared in each group.

That is, as shown in FIG. 3, the second embodiment is the same as the embodiment of FIG. 1 in that the X voltage and the Y voltage are scan pulses having the same timing. Further, the second embodiment of FIG. 3 differs from the embodiment of FIG. 1 in that the scan pulse indicated by the X voltage is also generated at the timing when the scan pulse indicated by the Y voltage does not appear. Thus, the scan pulse for the X voltage is shared by the odd group and the even group.

For example, FIG. 3 shows only four types of X voltages, but at time T1 when the X1 voltage rises, the Y3 voltage does not rise at the odd-numbered X3 voltage. , The scan pulse has risen. At the time T2 when the even-numbered X2 voltage rises, similarly, at the even-numbered time, Y2
Although the four voltages have not risen, the scan pulse has also risen at the X4 voltage.

As is apparent from FIG. 3, the waveforms of the respective X voltages are all the same at the odd-numbered and all the same at the even-numbered. Therefore, according to this embodiment, As the scan pulse to be applied to the X electrode, only two kinds of pulses for odd-numbered and even-numbered scans are required. For the X-electrode, odd-numbered and even-numbered scans are commonly connected, and two types of scan pulses are respectively used. One and the other should be supplied.

Therefore, according to the second embodiment shown in FIG. 3, the same effect as that of the embodiment described with reference to FIG. 1 is obtained, and the scan pulse for the X electrode is independent of the number of X electrodes. In addition, since only two types are required, the configuration of the circuit device for generating the scan pulse can be simplified, and the number of lead lines from the X electrode can be reduced, so that the cost can be greatly reduced. Obtainable.

[0064]

According to the present invention, crosstalk can be suppressed only by changing the scan pulse waveform at the time of address discharge, so that a PDP with excellent display quality, which is hardly affected by crosstalk, can be easily provided. can do. As a result, noise due to crosstalk is reduced, and a high-quality, high-definition PDP free of noise can be easily obtained.

Furthermore, since the area of the X electrode and the Y electrode can be sufficiently increased without increasing the frequency of occurrence of crosstalk due to the address discharge, an image having a high display luminance can be obtained without fail. A high-quality PDP can be easily provided.

[Brief description of the drawings]

FIG. 1 is a waveform diagram illustrating an embodiment of a driving method of a plasma display device according to the present invention.

FIG. 2 is an explanatory diagram illustrating a driving state of the plasma display device according to the embodiment of the present invention.

FIG. 3 is a waveform diagram showing another embodiment of the driving method of the plasma display device according to the present invention.

FIG. 4 is an exploded view showing an example of a plasma display device.

FIG. 5 is a cross-sectional view illustrating an example of a plasma display device.

FIG. 6 is a perspective plan view showing an example of a plasma display device.

FIG. 7 is an explanatory diagram of a subfield in driving the plasma display device.

FIG. 8 is a waveform diagram showing an example of a subfield driving method of the plasma display device.

FIG. 9 is a waveform diagram illustrating an example of a driving method of a plasma display device according to the related art.

FIG. 10 is an explanatory diagram illustrating an example of a driving state of a plasma display device according to the related art.

FIG. 11 is a waveform diagram showing another example of a driving method of a plasma display device according to the related art.

FIG. 12 is an explanatory diagram showing another example of a driving state of the plasma display device according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Front glass substrate 2 Back glass substrate 3 X sustain electrode 4 Y sustain electrode 5 Dielectric layer 6 Address electrode 7 Dielectric layer (phosphor) 8 Partition wall 9 Discharge space 10 1 frame period 11 1st subfield 12 2nd subfield 13 Third subfield 14 Fourth subfield 15 Fifth subfield 16 Sixth subfield 17 Reset discharge period 18 Address discharge period 19 Sustain discharge period 20 Bus electrode 21 Positive wall charge 22 Negative wall charge 23 Positive space charge 24 Negative space charge 25 Address discharge 26 Weak discharge (discharge by self-absorption)

Continued on the front page (72) Inventor Eiji Fukumoto 7-1-1, Omika-cho, Hitachi City, Ibaraki Prefecture Inside the Hitachi Research Laboratory, Hitachi, Ltd. (72) Keizo Suzuki 1-280, Higashi-Koikekubo, Kokubunji-shi, Tokyo Hitachi, Ltd. Inside the Central Research Laboratory (72) Inventor Shoji Ishigaki 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside the Information Media Business Unit of Hitachi, Ltd. (72) Takeo Masuda Inventor 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi, Ltd. Information Media Business Division

Claims (3)

[Claims] 1. A three-electrode surface discharge type plasma display device in which a plurality of sustaining electrodes are formed of two electrodes, an X sustaining electrode and a Y sustaining electrode, which are arranged in parallel with each other. And driving the X sustaining electrode and the Y sustaining electrode at the same timing by scanning pulses having the same time width. 2. The method according to claim 1, wherein the scan pulse is applied at an independent timing for each of the X sustain electrode and the Y sustain electrode. 3. The invention according to claim 1, wherein the X sustain electrodes are divided into two groups, and the scan pulse is applied to one and the other of the two groups of X sustain electrodes at the same timing. A method for driving a plasma display device, comprising: