JP2008015058A - Driving method of plasma display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain stable write-in discharge by generating write-in discharge surely separately by a difference of voltages applied to respective data electrode groups without setting a difference of timing for applying write-in pulse voltage, and by sufficiently suppressing a peak value of a discharge current flowing to a scanning electrode in discharging during a write-in period and thereby stabilizing an application voltage to each discharge cell. <P>SOLUTION: In a driving method of a plasma display panel constituted so that a substrate in which a plurality of pairs of scanning electrodes and maintaining electrodes are arranged, and a substrate in which a plurality of data electrodes are arranged so as to lie at right angles to the scanning electrodes and the maintaining electrodes are oppositely arranged, the data electrodes are divided into at least two data electrode groups, and the data voltages applied to the respective data electrode groups are set to be different from each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for driving a plasma display panel.

  A general plasma display panel (hereinafter referred to as PDP) includes a front plate made of a glass substrate formed by arranging scan electrodes and sustain electrodes for performing surface discharge, and a glass substrate formed by arranging data electrodes. The back plate and the back plate are arranged in parallel so that both electrodes form a matrix and form a discharge space in the gap, and the outer periphery is sealed with a sealing material such as glass frit. . Discharge cells partitioned by barrier ribs are provided between the substrates, and a phosphor layer is formed in the cell space between the barrier ribs. In the PDP having such a configuration, ultraviolet light is generated by gas discharge, and phosphors of each color of red (R), green (G), and blue (B) are excited by the ultraviolet light to emit light, thereby performing color display. Is going.

  In this PDP, one field period is divided into a plurality of subfields, and is driven by a combination of subfields that emit light to perform gradation display. Each subfield includes an initialization period, a writing period, and a sustain period. In order to display image data, different signal waveforms are applied to each electrode in the initialization period, the writing period, and the sustain period.

  In the initialization period, for example, a positive pulse voltage is applied to all the scan electrodes, and necessary wall charges are accumulated on the protective layer and the phosphor layer on the dielectric layer covering the scan electrodes and the sustain electrodes. In addition, it has a function of generating priming (priming for discharge = excited particles) for reducing the discharge delay and stably generating the write discharge.

  In the writing period, scanning is performed by sequentially applying a negative scanning pulse to all the scanning electrodes. Then, while scanning the scan electrode, a positive write pulse voltage is applied to the data electrode based on the display data. Thus, a write discharge is generated between the scan electrode and the data electrode, and a wall charge is formed on the surface of the protective layer on the scan electrode. At this time, since the write voltage is simultaneously applied to all the data electrodes constituting the display cell for generating the write discharge, all the write discharges to be generated are generated at one time on one scan electrode.

  In the subsequent sustain period, a voltage sufficient to maintain the discharge is applied between the scan electrode and the sustain electrode for a certain period. Thereby, discharge plasma is generated between the scan electrode and the sustain electrode, and the phosphor layer is excited to emit light for a certain period. At this time, in the discharge space where the write pulse voltage is not applied in the write period, no discharge occurs and excitation light emission of the phosphor layer does not occur.

  In such a PDP, there is a problem that a large discharge delay occurs in the writing discharge in the writing period, and the writing operation may become unstable.

  In order to solve these problems, a technique is proposed in which a data electrode is divided into at least two data electrode groups and a time difference is provided between the data electrode groups at the timing of application of the write voltage to the data electrodes in the write period. (For example, refer to Patent Document 1).

In this technique, a time difference is provided in the timing of application of the write pulse voltage to the data electrode in the write period, and a time difference is given to the generation of the write discharge in each data electrode group, whereby the discharge generated in the scan electrode during the write discharge. The current is distributed. By doing so, the peak value of the discharge current flowing through the scan electrode can be suppressed as compared with the case where all the write discharges are generated at one time on one scan electrode. Therefore, it is possible to stabilize the voltage applied to each discharge cell by suppressing the voltage effect generated by the impedance existing in the circuit that drives the scan electrode, the metal line that forms the scan electrode, and the like, thereby realizing stable discharge.
JP-A-8-305319

  However, in the above-described prior art, in order to sufficiently reduce the peak value of the discharge current, the writing discharge must be reliably separated and generated. For this purpose, a sufficient time difference must be provided in the timing of application of the write pulse voltage to each data electrode group, so that there is a problem that the write time is set long and the time spent in the write period is increased. .

  In particular, in a high-definition PDP, the time spent in the writing period becomes longer due to the increase in the number of scanning electrodes, and the time spent in the maintenance period has to be reduced correspondingly, resulting in a problem that it is difficult to ensure luminance. Therefore, in such a PDP, it is necessary to shorten the writing time as much as possible and secure the time spent in the sustain period.

  In order to solve such a problem, the PDP driving method according to the present invention includes a substrate on which a plurality of pairs of scan electrodes and sustain electrodes are arranged and a substrate on which a plurality of data electrodes are arranged. A method of driving a PDP in which an electrode, the sustain electrode, and the data electrode are arranged so as to be orthogonal to each other, wherein the data electrode is divided into at least two data electrode groups, and data applied to each data electrode group The voltage is set differently.

  The data voltage applied to each of the data electrode groups may be set higher from the side closer to the scanning electrode lead line.

  Further, the ratio of subfields to which the scan electrodes are lit is detected, and the data electrodes are divided into at least two data electrode groups according to the ratio of the subfields to be lit, and the data voltages applied to the respective data electrode groups. May be set differently.

  According to the present invention, when the data electrode is divided into at least two data electrode groups and driven in the PDP, the data voltage applied to each data electrode group is set to be different so that the write pulse voltage can be reduced. Without providing a time difference in the application timing, the write discharge can be reliably generated by the difference in voltage applied to each data electrode group, and the peak of the discharge current flowing through the scan electrode during the discharge in the write period The value can be sufficiently suppressed to stabilize the voltage applied to each discharge cell, and a stable write discharge can be realized.

  Hereinafter, a PDP driving method according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a perspective view showing a main part of a PDP used in Embodiment 1 of the present invention. The PDP 1 is configured so that a glass front substrate 2 and a back substrate 3 are disposed to face each other and a discharge space is formed therebetween.

  On the front substrate 2, a plurality of scanning electrodes 4 and sustaining electrodes 5 constituting display electrodes are formed in parallel with each other. A dielectric layer 6 is formed so as to cover the scan electrode 4 and the sustain electrode 5, and a protective layer 7 is formed on the dielectric layer 6. The protective layer 7 is preferably made of a material having a large secondary electron emission coefficient and high sputtering resistance in order to generate a stable discharge, and a magnesium oxide (MgO) thin film is used.

  A plurality of data electrodes 9 covered with an insulating layer 8 are provided on the back substrate 3, and a partition wall 10 is provided in parallel with the data electrodes 9 on the insulating layer 8 between the data electrodes 9. In addition, phosphors 11 are provided on the surface of the insulator layer 8 and the side surfaces of the partition walls 10. The front substrate 2 and the rear substrate 3 are arranged to face each other so that the scan electrode 4 and the sustain electrode 5 and the data electrode 9 cross each other, and for example, neon as a discharge gas is formed in the discharge space formed therebetween. A mixed gas of xenon is enclosed.

  FIG. 2 is an electrode array diagram of the PDP 1 shown in FIG. In the row direction (or horizontal direction), n scan electrodes SCN1 to SCNn (scan electrode 4 in FIG. 1) and n sustain electrodes SUS1 to SUSn (sustain electrode 5 in FIG. 1) are alternately arranged in the column direction ( Alternatively, (k + m) columns of data electrodes D11 to D1k and D21 to D2m (data electrode 9 in FIG. 1) are arranged in the vertical direction.

  A discharge cell Cij including a pair of scan electrodes SCNi, sustain electrodes SUSi (i = 1 to n) and one data electrode Dj (Dj = D11 to D1k, D21 to D2m) is formed in the discharge space. The total number of cells C is ((k + m) × n). In the PDP having such a configuration, color display is performed by generating ultraviolet rays by gas discharge and exciting the phosphors of R, G, and B colors with the ultraviolet rays to emit light.

  FIG. 3 is a circuit configuration diagram of a plasma display device configured using the PDP 1 shown in FIGS. This plasma display device includes a PDP 1, a data electrode drive circuit 12, a scan electrode drive circuit 13, a sustain electrode drive circuit 14, a timing generation circuit 15, an A / D (analog / digital) conversion unit 16, a scan line conversion unit 17, an SF A (subfield) converter 18 and a power supply circuit (not shown) are provided, and a first data electrode voltage circuit 19 and a second data electrode voltage circuit 20 are provided in the data electrode drive circuit 12.

  In FIG. 3, the video signal sig is input to the A / D converter 16. In addition, the horizontal synchronization signal H and the vertical synchronization signal V are input to the timing generation circuit 15, the A / D conversion unit 16, the scanning line conversion unit 17, and the SF conversion unit 18. The A / D converter 16 converts the video signal sig into digital signal image data, and outputs the image data to the scanning line converter 17. The scanning line conversion unit 17 converts the image data into image data corresponding to the number of pixels of the PDP 1 and outputs the image data to the SF conversion unit 18.

  The SF converter 18 divides the image data of each pixel into a plurality of bits corresponding to a plurality of subfields, and outputs the image data for each subfield to the data electrode drive circuit 12 and the timing generation circuit 15. The data electrode drive circuit 12 converts the image data for each subfield into signals corresponding to the data electrodes D11 to D1k and D21 to D2m, and drives the data electrodes D11 to D1k and D21 to D2m. At this time, the data electrode group of the data electrodes D11 to D1k and the data electrode group of the data electrodes D21 to D2m are obtained by the first data electrode voltage circuit 19 and the second data electrode voltage circuit 20 in the data electrode drive circuit 12, respectively. Can be driven with different data voltages.

  The timing generation circuit 15 generates a timing signal based on the image data for each subfield, the horizontal synchronization signal H, the vertical synchronization signal V, and the set value of the final pulse interval, and drives the scan electrode drive circuit 13 and the sustain electrode, respectively. Output to the circuit 14. Scan electrode drive circuit 13 supplies a drive waveform to scan electrodes SCN1 to SCNn based on the timing signal, and sustain electrode drive circuit 14 supplies a drive waveform to sustain electrodes SUS1 to SUSn based on the timing signal.

  Next, a drive waveform for driving the PDP 1 and its operation will be described. FIG. 4 is a drive waveform diagram applied to the data electrode, scan electrode, and sustain electrode of PDP 1 in the first exemplary embodiment of the present invention. As shown in FIG. 4, one field period is divided into a plurality of (here, 10) subfields (1SF, 2SF,..., 10SF), and each subfield of 1SF to 10SF is (1, 2, 3, 6, 11, 18, 30, 44, 60, 80). As described above, the luminance weight is increased in the subfield arranged behind in one field period. However, the number of subfields and the luminance weight of each subfield are not limited to the above values.

  Each subfield includes an initialization period for initializing the charge state of the discharge cell, an address period for performing an address discharge for selecting a discharge cell (display cell) to be displayed, and a discharge cell selected in the address period. A sustain period during which sustain discharge is performed.

  Further, in the initialization period, all cell initialization operations for performing an initializing discharge on all discharge cells, or an initial operation for a discharge cell (predetermined discharge cell) that has undergone a sustain discharge in the immediately preceding subfield. Any initializing operation of the selective initializing operation that causes the discharge is performed. By performing the initializing discharge, the charge state of the discharge cell is initialized. In the drive waveform of FIG. 4, the all-cell initialization operation is performed in the initialization period of 1SF, and the selective initialization operation is performed in the initialization period of 2SF to 10SF.

  First, in the initializing period of 1SF, initializing discharge is simultaneously performed in all the discharge cells, the wall charge history in each of the previous discharge cells is erased, and the wall charge necessary for performing the next address discharge is performed. Form. In addition, it has a function of generating priming for reducing the discharge delay and stably generating the write discharge. That is, all the data electrodes and all the sustain electrodes are held at 0 (ground potential), and gradually rises from the voltage Vp less than the discharge start voltage to the voltage Vr exceeding the discharge start voltage for all the scan electrodes. Apply the ramp voltage.

  As a result, weak discharge occurs in all the discharge cells, positive wall charges are stored on the sustain electrodes and the data electrodes, and negative wall charges are stored on the scan electrodes. After that, all the sustain electrodes are maintained at the voltage Vh, and by applying a ramp voltage that gradually decreases from Vg to Va to all the scan electrodes, a weak discharge is caused in all the discharge cells, Decreases stored wall charge. By such an all-cell initialization operation, the voltage in the discharge cell becomes close to the discharge start voltage.

  In the 1SF write period, scan pulses are sequentially applied from the scan electrode SCN1 in the first row to the scan electrode SCNn in the nth row, and a write pulse corresponding to the video signal to be displayed is applied to the predetermined data electrode Dj. Then, write discharge is selectively caused between the scan electrode and the data electrode in the display cell, and selective wall charge formation is performed.

  In the sustain period following the writing period, first, the first sustain pulse is applied to all scan electrodes SCN1 to SCNn, and then the second sustain pulse is applied to all sustain electrodes SUS1 to SUSn. Then, by applying a predetermined number of sustain pulses according to the luminance weight to scan electrodes SCN1 to SCNn and sustain electrodes SUS1 to SUSn, a sustain discharge is selectively generated in the discharge cells in which wall charges are formed by the write discharge. To emit light. Video display is performed by this light emission. In 1SF of FIG. 4, one sustain pulse is applied to each of the scan electrode and the sustain electrode. That is, a total of two sustain pulses are applied to the scan electrode and the sustain electrode.

  In the initialization period of 2SF, all the sustain electrodes SUS1 to SUSn are held at the voltage Vh, all the data electrodes D11 to D1k and D21 to D2m are held to 0, and all the scan electrodes SCN1 to SCNn are changed from the voltage Vb to the voltage Va. A ramp voltage that gradually falls toward is applied. While the lamp voltage is decreasing, in the discharge cells that have undergone the sustain discharge in the immediately preceding sustain period (sustain period of 1SF), the wall charges formed on the respective electrodes are weakened due to the occurrence of weak discharge, and the discharge cell. The voltage inside is close to the discharge start voltage.

  On the other hand, the discharge cells that did not perform the address discharge and the sustain discharge at 1SF are not weakly discharged during the 2SF initialization period, and the wall charge state at the end of the 1SF initialization period is maintained.

  In the 2SF writing period and sustain period, the same waveform as in 1SF is applied to generate a sustain discharge in the discharge cell corresponding to the video signal. In addition, for 3SF to 10SF, video display is performed by applying the same drive waveform as that of 2SF to each electrode.

  Here, in the first embodiment, as shown in FIG. 4, in the write period, the write pulse of the voltage Vk is applied to the data electrode group of the data electrodes D21 to D2m in the data electrode group of the data electrodes D11 to D1k. Applies a write pulse of voltage Vm. In this way, the data electrodes are divided into two groups, and the data voltage timing is changed for each of these electrode groups, so that the timing of the write discharge in the data electrode group of the data electrodes D11 to D1k and the data electrode group of the data electrodes D21 to D2m. Can be different. Here, the higher the data voltage value, the faster the write discharge.

  Therefore, in the same scan electrode, the write discharge can be reliably generated for each data electrode, and the peak value of the discharge current flowing through the scan electrode during the discharge in the write period can be sufficiently suppressed to each discharge cell. The applied voltage can be stabilized, and stable write discharge can be realized.

  In order to further improve the above effect, it is more effective to set the data voltage applied to each data electrode group higher from the side closer to the scanning electrode lead line. Next, the effect and the setting method of the write pulse will be described. Note that the lead-out line referred to here indicates a terminal portion for connecting to a drive circuit provided at the end of the PDP 1, and in this case, indicates a terminal portion connected to the scan electrode drive circuit 13.

  As described above, (k + m) data electrodes Dj intersect with one scan electrode SCNi. That is, one scan electrode SCNi has (k + m) intersecting regions across the discharge space with the data electrode Dj. However, the distances from the scan electrode driving circuit 13 are different in each intersection region.

  Therefore, the impedance from the scan electrode drive circuit 13 on the scan electrode SCNi to each crossing region is the internal capacitance of the parasitic capacitance generated between the scan electrode SCNi and the other electrode or the metal line itself forming the scan electrode SCNi. Due to the resistance or the like, the intersection region farther from the scan electrode drive circuit 13 becomes larger. In other words, the voltage drop due to the discharge current generated during the write discharge tends to increase as the crossing region is farther from the scan electrode driving circuit 13. If the voltage drop increases, the voltage applied to the discharge cell decreases, the discharge becomes unstable, and the discharge delay also increases.

  Therefore, by setting the write pulse voltage of the data electrode group higher from the side closer to the scan electrode lead portion, the timing of the write discharge of the data electrode group closer to the scan electrode lead portion can be made earlier, Conversely, the timing of the write discharge of the data electrode group far from the scanning electrode lead-out portion can be delayed because of the low write pulse voltage and the voltage drop of the discharge current of the write discharge.

  In this way, by setting the write pulse voltage of the data electrode group higher from the side closer to the lead-out portion of the scan electrode, the write discharge can be reliably and efficiently separated and generated.

  As described above, when the data electrodes are divided into at least two data electrode groups for driving, the data voltages applied to the respective data electrode groups are set differently, and the voltage settings are set for the extraction of the scan electrodes. By setting the data voltage higher from the side closer to the part, the write discharge can be reliably separated by the difference in the voltage applied to each data electrode group without causing a difference in the timing of applying the write pulse voltage. It is possible to stabilize the voltage applied to each discharge cell by sufficiently suppressing the peak value of the discharge current flowing through the scan electrode during the discharge in the write period, thereby realizing a stable write discharge.

  In the above example, the data electrodes are two data electrode groups D11 to D1k and D21 to D2m, and the voltage of the write pulse is set to two types Vk and Vm. However, the data electrodes are set to two or more groups, Even if different write pulse voltages are set for each, the same effect can be obtained.

  Further, in this embodiment, by setting the difference between the voltage Vk and Vm of the write pulse to about 5 V, the write discharge can be reliably generated and the peak value of the discharge current can be suppressed. However, the set value of this difference needs to be appropriately set according to the size of the image display area and the resistance value of each electrode.

(Embodiment 2)
Next, the second embodiment will be described. FIG. 5 is a configuration diagram of the plasma display device in accordance with the second exemplary embodiment of the present invention. This plasma display device includes the panel 1, the data electrode drive circuit 12, the scan electrode drive circuit 13, the sustain electrode drive circuit 14, the timing generation circuit 15, and the A / D (analog / digital) converter 16 shown in the first embodiment. In addition to the scanning line conversion unit 17, the SF (subfield) conversion unit 18, the power supply circuit (not shown), the first data electrode voltage circuit 19 and the second data electrode voltage circuit 20 in the data electrode drive circuit 12, A scanning line direction lighting SF detection unit 21 is provided for detecting a subfield that is lit in the scanning line direction.

  In the second embodiment, the scanning line direction lighting SF detection unit 21 detects the ratio of subfields that are lit in a certain scanning electrode SCNi, and when this threshold is exceeded or this ratio increases. Accordingly, the data electrodes are divided into two or more data electrode groups for driving, and the data voltages applied to the respective data electrode groups can be set differently.

  That is, when the ratio of the subfields to be lit in the same scan electrode is large, there are many cells that perform write discharge in the write period in one field of the scan electrode. The peak value of the flowing discharge current also increases. In such a case, by applying different data voltages to the respective data electrode groups, the write discharge can be reliably generated and the peak current and the amount of voltage drop can be suppressed.

  On the other hand, when the percentage of subfields to be lit is small, that is, when there are few cells that perform write discharge, it is not necessary to separate the write discharge by applying different data voltages to each data electrode group, and the data voltage set to be low Only one type needs to be applied. As a result, power consumption can be reduced.

  That is, the scanning line direction lighting SF detection unit 21 detects the ratio of subfields to be lit for each scanning electrode and each field, and changes the writing voltage. This will be described with reference to FIGS.

  FIG. 6 shows a driving waveform applied to the scanning electrode in which the ratio of the subfields lit by the scanning line direction lighting SF detector 21 is detected. FIG. 7 shows an example of an image display pattern in which the data voltage needs to be changed in each data electrode group.

  In FIG. 6, a scan electrode having a large ratio of the subfield to be lit is SCNr, and a scan electrode having a small ratio of the subfield to be lit is SCNs. FIG. 7A shows an example of an image display pattern that is lit by the scan electrode SCNr having a large ratio of the subfield to be lit and an example of an image display pattern that is lit by the scan electrode SCNs having a small ratio.

  As described above, in the scan electrode SCNr in which the ratio of the subfield to be lit is large, this ratio is detected by the scan line direction lighting SF detection unit 21, and the voltage Vkr is applied to the data electrodes D11 to D1k, and the data electrodes D21 to D2m. A voltage Vm is applied to. On the other hand, in scan electrodes SCNs having a small proportion of lighted subfields, voltage Vks is applied to data electrodes D11 to D1k, and voltage Vm is applied to data electrodes D21 to D2m. Here, the magnitude relationship among the values of the voltage Vkr, the voltage Vks, and the voltage Vm is Vkr> Vks = Vm, and the voltage value difference between Vkr, Vks, and Vm is 5V.

  Thereby, by changing the voltage applied to each data electrode group according to the size of the image display pattern, that is, the ratio of the subfield to be lit, the write discharge can be reliably generated separately. A stable write discharge can be realized by sufficiently suppressing the peak value of the discharge current flowing through the scan electrode during the discharge in the write period to stabilize the voltage applied to each discharge cell.

  As shown in FIG. 5, each scan electrode is wired to the scan electrode drive circuit 13 at a time. For this reason, the peak current and the voltage drop amount are not only the ratio of the ratio of the subfields to be lit in the wiring direction of each scan electrode as described in this embodiment, but also the ratio of the subfields to be lit in all the scan electrodes. That is, it also changes depending on the size of the subfield to be lit in the entire image display area.

  FIG. 7B shows an example of an image display pattern in which the data voltage needs to be changed for each data electrode group in the present embodiment. As described above, in each scan electrode, the ratio of the subfield to be lit is small, and even when there is no need to change the data voltage for each data electrode group, all the scan electrodes have the same image display pattern. The peak current in the electrode drive circuit 13 becomes larger because of the integration of each scan electrode, and the peak current value and voltage drop amount also increase. Therefore, even in such an image display pattern, the data voltage is set to change for each data electrode group.

  Therefore, the scanning line direction lighting SF detector 21 measures the proportion of subfields that are lit at each scanning electrode, and also measures the proportion of subfields that are lit at all the scanning electrodes. Whether to change the data voltage for each electrode group is determined. When the threshold voltage is equal to or higher than a certain threshold value, the data voltage is changed for each data electrode group to suppress the peak current generated in the scan electrode driving circuit 13.

  As described above, according to the second embodiment, it is possible to sufficiently suppress the peak value of the discharge current flowing through the scan electrode during the discharge in the write period, stabilize the voltage applied to each discharge cell, and realize a stable write discharge. At the same time, when the ratio of the subfields to be lit is small in the same scan electrode, a high data voltage is not applied unnecessarily, and power consumption can be suppressed.

  Similar to the first embodiment, in the second embodiment, the same effect can be obtained by setting the data electrodes to two or more groups and setting different write pulse voltages.

  As described above, as described in the first and second embodiments, the peak current and the voltage drop amount depend on the resistance value of each display electrode, the number of discharges in the writing period, and the magnitude of each discharge. That is, as the panel size (image display area) increases, and the same panel size becomes higher definition (the number of discharge cells increases), the peak current value and voltage drop amount at each display electrode increase. Become. For this reason, when the panel size is larger and the resolution is higher, the effect of the present invention can be further utilized by setting the number of divisions of the data electrode group to 2 or more.

  As described above, the peak value of the discharge current flowing through the scan electrode during discharge during the writing period is sufficiently suppressed to stabilize the voltage applied to each discharge cell, realizing stable writing discharge, and displaying images with good quality. This is a useful invention capable of providing a PDP to be performed.

The perspective view which shows a part of plasma display panel as Embodiment 1 of this invention in a cross section Electrode arrangement of the plasma display panel Configuration diagram of plasma display device as embodiment 1 of the present invention Operation drive timing chart showing a method of driving a plasma display panel as Embodiment 1 of the present invention Configuration of Plasma Display Device as Embodiment 2 of the Present Invention Operation driving timing chart showing a driving method of the plasma display panel as the second embodiment of the present invention The figure which shows the example of an image display pattern in the plasma display apparatus as Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Panel 12 Data electrode drive circuit 13 Scan electrode drive circuit 14 Sustain electrode drive circuit 15 Timing generation circuit 16 A / D conversion part 17 Scan line conversion part 18 SF conversion part 19 1st data electrode voltage circuit 20 2nd data electrode voltage circuit

Claims (3)

A substrate in which a plurality of pairs of scan electrodes and sustain electrodes are arranged and a substrate in which a plurality of data electrodes are arranged are arranged so as to face each other so that the scan electrodes, the sustain electrodes, and the data electrodes are orthogonal to each other In the plasma display panel driving method, the data electrodes are divided into at least two data electrode groups, and the data voltages applied to the data electrode groups are set differently. 2. The method of driving a plasma display panel according to claim 1, wherein the data voltage applied to each of the data electrode groups is set higher from the side closer to the lead line of the scan electrode. The ratio of the subfield to which the scanning electrode is lit is detected, and the data electrode is divided into at least two data electrode groups according to the ratio of the lit subfield, and the data voltage applied to each data electrode group is different. 3. The method of driving a plasma display panel according to claim 1, wherein the driving method is set as follows.

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