JP4639579B2 - Driving method of plasma display panel - Google Patents

Description

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

  A plasma display panel (hereinafter abbreviated as PDP or panel) is a display device with excellent visibility characterized by a large screen, a thin shape, and a light weight. PDP discharge methods include AC and DC types, and electrode structures include a three-electrode surface discharge type and a counter discharge type. However, at present, AC type three-electrode PDPs, which are AC type and surface discharge type, are mainstream because they are suitable for high definition and easy to manufacture.

  The AC type three-electrode PDP is generally formed by forming a large number of discharge cells between a front plate and a back plate arranged to face each other. The front plate is formed with a plurality of pairs of display electrodes composed of scan electrodes and sustain electrodes on the front glass substrate in parallel with each other, and a dielectric layer and a protective layer are formed so as to cover the display electrodes. The back plate has a plurality of parallel data electrodes on the back glass substrate, a dielectric layer so as to cover them, and a plurality of partition walls formed in parallel to the data electrodes on each of the dielectric layers. A phosphor layer is formed on the side surface of the partition wall. The front plate and the back plate are opposed and sealed so that the display electrode and the data electrode cross three-dimensionally, and a discharge gas is sealed in the internal discharge space. In the panel having such a configuration, ultraviolet light is generated by gas discharge in each discharge cell, and phosphors of RGB colors are excited and emitted by the ultraviolet light to perform color display.

  As a method for driving the panel, a so-called subfield method is generally used in which one field period is divided into a plurality of subfields, and gradation display is performed by a combination of subfields that emit light. Here, each subfield has an initialization period, an address period, and a sustain period.

  In the initializing period, initializing discharge is simultaneously performed in all the discharge cells, the history of wall charges for the individual individual discharge cells is erased, and wall charges necessary for the subsequent address operation are formed. In addition, it has a function of generating priming (priming for discharge = excited particles) for stably generating address discharge.

  In the address period, a scan pulse is sequentially applied to the scan electrodes, an address pulse corresponding to an image signal to be displayed is applied to the data electrodes, and an address discharge is selectively generated between the scan electrodes and the data electrodes. Selective wall charge formation is performed.

  In the subsequent sustain period, a predetermined number of sustain pulses are applied between the scan electrodes and the sustain electrodes, and the discharge cells in which the wall charges are formed by the address discharge are selectively discharged to emit light.

  On the other hand, as a method of driving the panel, a driving method for improving the contrast ratio by reducing the number of times of the light emission of the initialization discharge not related to the gradation expression as much as possible, the so-called high contrast driving method has been proposed and put into practical use ( For example, see Patent Document 1).

  In the above-described high contrast driving method, one field is composed of a plurality of subfields each having an initialization period, an address period, and a sustain period. In the initialization operation in the initialization period, all discharge cells are used. There is an all-cell initializing operation to be initialized, and a selective initializing operation for selectively initializing only discharged discharge cells. The all-cell initializing operation is performed only in the initializing period of the first subfield, for example. In the sub-field, selective initialization operation is performed.

As described above, the initialization operation in the majority of the subfields among the plurality of subfields is a selective initialization operation in which discharge is generated only to the discharge cells in which the sustain discharge has occurred. Therefore, initialization light emission not related to gradation display is performed only once per field, that is, only the initializing operation for all cells in the first subfield, and the light emission is also weak light emission with a ramp waveform voltage, so that the contrast is high. Image display is possible.
JP 2000-242224 A

  However, by reducing the number of all-cell initializations, the amount of priming of discharge cells that do not emit light also decreases, and the stability of the initialization discharge itself tends to decrease. Furthermore, PDP tends to have smaller and smaller discharge cells with higher definition. As the discharge cell becomes finer, the discharge probability also decreases, and the initialization discharge itself, which is the key to PDP discharge control, may become more unstable. In particular, the discharge that forms positive wall charges on the data electrode in the initialization operation is a discharge in which the data electrode side is a cathode and the scan electrode side is an anode, but the discharge in which the data electrode is a cathode tends to be unstable. As a result, there is a possibility that a discharge cell that should emit light during the sustain period does not emit light, or conversely, a discharge cell that should not emit light emits light.

  The driving method of the plasma display of the present invention has been made in view of these problems, and an object thereof is to provide a driving method of a plasma display panel capable of stable initializing discharge in the initializing period.

  In the driving method of the plasma display panel of the present invention, one field is composed of a plurality of subfields having an initialization period, an address period, and a sustain period, and the initialization period of at least one subfield among the plurality of subfields is the first. The first initialization period, the second initialization period, and the third initialization period. In the first initialization period, a discharge is generated with the scan electrode as a cathode and the sustain electrode as an anode. In the initialization period 2, a discharge is generated with the sustain electrode and the data electrode as the cathode and the scan electrode as the anode, and in the third initialization period, a discharge with the scan electrode as the cathode and the sustain electrode and the data electrode as the anode is generated. The discharge generated and generated in the second initialization period is characterized by starting discharge with the sustain electrode as the cathode and then starting discharge with the data electrode as the cathode.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the drive method of the plasma display panel which enables the stable initializing discharge in the initializing period.

According to the first aspect of the present invention, there is provided a plasma display having a plurality of scan electrodes and a plurality of sustain electrodes arranged in parallel to each other, and a plurality of data electrodes arranged in a direction crossing the scan electrodes. A panel driving method, wherein one field includes a plurality of subfields having an initialization period, an address period, and a sustain period, and an initialization period of at least one subfield of the plurality of subfields is a first period There are an initializing period, a second initializing period, and a third initializing period . In the first initializing period, the data electrode is held at 0 (V) and the sustain electrode is In the state where the voltage Vq is applied, the scan electrode is changed from a voltage not exceeding the discharge start voltage between the data electrode and the sustain electrode to a voltage exceeding the discharge start voltage between the sustain electrode. By applying a downward ramp waveform voltage that gradually falls, a discharge is generated with the scan electrode as a cathode and the sustain electrode as an anode. During the second initialization period, the data electrode and the sustain electrode are With each held at 0 (V), the scan electrode is changed from a voltage not exceeding the discharge start voltage between the data electrode and the sustain electrode to a voltage exceeding the discharge start voltage between the data electrode and the sustain electrode. By applying an upward ramp waveform voltage that gradually rises toward the discharge, a discharge is generated with the sustain electrode and the data electrode serving as a cathode and the scan electrode serving as an anode. In the third initialization period, the data The electrode is held at 0 (V) and a positive voltage Ve lower than the positive voltage Vq is applied to the sustain electrode, and the data electrode and the sustain electrode are applied to the scan electrode. By applying a downward ramp waveform voltage that gradually falls from the voltage that is equal to or lower than the discharge start voltage to the electrode to a voltage that exceeds the discharge start voltage between the data electrode and the sustain electrode, the scan electrode is The discharge that uses the sustain electrode as the cathode and the data electrode as the anode, and the discharge that occurs during the second initialization period starts the discharge that uses the sustain electrode as the cathode, It is characterized in that it is configured to start discharge as a cathode .

(Embodiment)
Hereinafter, a method for driving a plasma display panel according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is an exploded perspective view showing the structure of a plasma display panel used in an embodiment of the present invention. The plasma display panel 1 has a front plate 2 and a back plate 3 that are arranged to face each other. The front plate 2 has a plurality of pairs of scan electrodes 5 and sustain electrodes 6 formed on the front glass substrate 4 in parallel with each other. A dielectric layer 7 is formed so as to cover the scan electrodes 5 and the sustain electrodes 6, and a protective layer 8 is formed so as to cover the surface of the dielectric layer 7. In the back plate 3, a plurality of data electrodes 10 are formed in parallel to each other on a back glass substrate 9, and a dielectric layer 11 is formed so as to cover the data electrodes 10. A plurality of barrier ribs 12 are formed on the dielectric layer 11 in parallel with the data electrodes 10, and a phosphor layer 13 is formed on the surface of the dielectric layer 11 and the side surfaces of the barrier ribs 12. Further, a discharge gas is sealed in the discharge space sandwiched between the front plate 2 and the back plate 3.

FIG. 2 is an electrode array diagram of the plasma display panel used in the embodiment of the present invention. Data electrodes D _{1 to} D _m (data electrodes 10 in FIG. 1) in the column direction are arranged, and n rows of scan electrodes SC _{1 to} SC _n (scan electrodes 5 in FIG. 1) and n rows in the row direction are arranged. Sustain electrodes SU _{1 to} SU _n (sustain electrodes 6 in FIG. 1) are alternately arranged. In addition, m × n discharge cells 15 including a pair of scan electrodes SC _i , sustain electrodes SU _i (i = 1 to n) and one data electrode D _j (j = 1 to m) are included in the discharge space. Is formed.

  Next, driving waveforms and timings for driving the plasma display panel will be described.

  FIG. 3 is a drive waveform diagram of the plasma display panel drive method according to the embodiment of the present invention. In the embodiment of the present invention, one field period is composed of a plurality of subfields having an initialization period, an address period, and a sustain period, and the first subfield includes substantially all discharge cells related to image display. The subfield has an all-cell initializing period for initializing operation, and the subfield after the second subfield is a subfield having a selective initializing period for selectively initializing discharge cells that have undergone sustain discharge. It will be explained as a thing. As shown in FIG. 3, the all-cell initializing period of the first subfield is divided into three periods of a first initializing period, a second initializing period, and a third initializing period.

In a first initialization period, the data electrodes D ₁ to D _m kept 0 (V), applying a positive voltage Vq to the sustain electrodes SU ₁ to SU _n. Then, a downward ramp waveform voltage that gently falls from voltage V _i5 to voltage V _i6 is applied to scan electrodes SC _{1 to} SC _n . Here, voltage V _i5 is a voltage that does not exceed the discharge start voltage between scan electrodes SC ₁ -SC _n and sustain electrodes SU ₁ -SU _n and data electrodes D ₁ -D _m, and in the embodiment of the present invention. Is 0 (V). Voltage V _i6 is a voltage exceeding the discharge start voltage between scan electrodes SC _{1 to} SC _n and sustain electrodes SU _{1 to} SU _n . While this downward ramp waveform voltage drops from voltage V _i5 to voltage V _i6 , a weak discharge occurs between scan electrodes SC _{1 to} SC _n and sustain electrodes SU _{1 to} SU _n, and upper portions of sustain electrodes SU _{1 to} SU _n. Stores a negative wall voltage. Here, the wall voltage on the electrode indicates a voltage generated by wall charges accumulated on the dielectric layer covering the electrode. At this time, the absolute value of the negative wall voltage is accumulated on sustain electrode SU ₁ to SU _n and increasing the voltage Vq to be applied to the sustain electrodes SU ₁ to SU _n increases.

In the second initialization period, the data electrodes D _{1 to} D _m and the sustain electrodes SU _{1 to} SU _n are held at 0 (V), respectively. Then, the voltage V _i1 that does not exceed the discharge start voltage with respect to the scan electrodes SC ₁ to SC _n sustain electrodes SU ₁ to SU _n and the data electrodes D ₁ to D _m, sustain electrodes SU ₁ to SU _n and the data electrodes An upward ramp waveform voltage that gradually rises toward voltage V _i2 exceeding the discharge start voltage is applied to D _{1 to} D _m . While this rising ramp waveform voltage rises, a weak initializing discharge is generated with scan electrodes SC _{1 to} SC _n as anodes and sustain electrodes SU _{1 to} SU _n and data electrodes D _{1 to} D _m as cathodes. Negative wall voltage is accumulated on scan electrodes SC _{1 to} SC _n, and positive wall voltage is accumulated on data electrodes D _{1 to} D _m and sustain electrodes SU _{1 to} SU _n .

At this time first to start discharge of the sustain electrodes SU ₁ to SU _n side, then setting the voltage to be applied to the respective electrodes so as to start discharge of the data electrodes D ₁ to D _m side. In the embodiment of the present invention realizes the above conditions by setting higher also than the voltage Ve to be described later applied voltage Vq to the sustain electrodes SU ₁ to SU _n in the first initialization period. That is, when the high voltage settings Vq, since the large negative wall voltage on sustain electrodes SU ₁ to SU _n are accumulated in the first initialization period, at the time of performing the second initialization period, a second larger than the difference between the potential difference scan electrodes SC ₁ to SC _n and data electrodes D ₁ to D _m during the initialization period and the scan electrodes SC ₁ to SC _n and sustain electrodes SU ₁ to SU _n of it can, thereby, compared to the discharge between the scan electrodes SC ₁ to SC _n and data electrodes D ₁ to D _m, the start of discharge between the sustain electrodes SU ₁ to SU _n and scan electrodes SC ₁ to SC _n Can be expedited. The discharge at this time is very important for stable operation of the plasma display as will be described later.

In the third initialization period, the data electrodes D ₁ to D _m kept 0 (V), keeping the sustain electrodes SU ₁ to SU _n to a positive voltage Ve. Then, the scan electrodes SC ₁ to SC _n, toward the sustain electrodes SU ₁ to SU _n and the data electrodes D ₁ voltage V _i3 which is a discharge start voltage or less with respect to D _m to the voltage V _i4 exceeding the discharge start voltage Apply a descending ramp waveform voltage that gradually falls. During this time, a weak initializing discharge occurs between scan electrodes SC _{1 to} SC _n , sustain electrodes SU _{1 to} SU _n , and data electrodes D _{1 to} D _m . Then, the negative wall voltage above scan electrodes SC ₁ -SC _n and the positive wall voltage above sustain electrodes SU ₁ -SU _n are weakened, and the positive wall voltage above data electrodes D ₁ -D _m is used for the write operation. It is adjusted to a suitable value. Thus, the all-cell initialization operation for initializing all the discharge cells involved in image display is completed.

In the address period, scan electrodes SC _{1 to} SC _n are temporarily held at Vc. Next, scan pulse voltage Va is applied to the first row to the scan electrodes SC _1. At the same time, a positive write pulse voltage Vd is applied to the data electrode D _k (k represents an integer of 1 to _m ) corresponding to the image signal to be displayed in the first row among the data electrodes D _{1 to} D _m. . Then, discharge occurs at the intersection of the write pulse voltage Vd data electrode D _k of applying the scan electrodes SC _1, between the corresponding discharge cell C _1, sustain electrodes SU ₁ to _k and the scan electrodes SC ₁ Progresses to discharge. Then, a positive voltage is accumulated on the scan electrode SC _{1 of} the discharge cell C _{1, k} , and a negative voltage is accumulated on the sustain electrode SU ₁ , thereby completing the address operation in the first row. Thereafter, the same address operation is performed until the discharge cell C _{n, k} in the _n- th row _, and the address operation is completed.

In the sustain period, scan electrodes SC _{1 to} SC _n and sustain electrodes SU _{1 to} SU _n are once returned to 0 (V). Thereafter, positive sustain pulse voltage Vs is applied to scan electrodes SC _{1 to} SC _n . At this time, the voltage between the upper portion of scan electrode SC _{i and} upper portion of sustain electrode SU _i in discharge cell C _{i, j} in which the address discharge has occurred is accumulated on upper portion of scan electrode SC _{i and} upper portion of sustain electrode SU _i in the address period. In addition to the wall voltage, the sustain pulse voltage Vs is added so that the discharge start voltage is exceeded and a sustain discharge occurs. Then, a negative voltage is accumulated on scan electrode SC _{i of} discharge cell C _{i, j} , and a positive voltage is accumulated on sustain electrode SU _i . Hereinafter, similarly, by applying a sustain pulse alternately to the scan electrodes SC ₁ to SC _n and sustain electrodes SU ₁ to SU _n, discharge cells C _i having generated the address _discharge, the number of times of sustain pulses to _j The sustain discharge is continuously performed.

  Here, in order to explain the reason why the initialization discharge is stabilized, the operation in the second initialization period will be described again, focusing on the data electrode.

The discharge between the scan electrodes SC _{1 to} SC _n and the data electrodes D _{1 to} D _m in the second initialization period is the data electrode D _{1 to} D _m side, that is, the phosphor layer (phosphor layer 13 in FIG. 1). The side becomes the cathode. However, since the phosphor has a small secondary electron emission coefficient, if the priming is insufficient, the discharge delay tends to increase. If the discharge delay is too large, no discharge occurs even if the upward ramp waveform voltage applied to scan electrodes SC _{1 to} SC _n exceeds the discharge start voltage, and the discharge is generated only when the discharge start voltage is greatly exceeded. To do. The discharge at this time does not become a weak discharge but becomes a strong discharge with a large charge transfer, and the subsequent address operation and sustain operation cannot be controlled, and normal image display cannot be performed. In addition, the state in which no discharge is generated even when the discharge start voltage is exceeded is very unstable, and it is strongly affected by interference from slight priming that cannot be controlled due to discharge between neighboring cells and other electrodes. It may induce a discharge. As described above, the discharge in which the data electrodes D _{1 to} D _m serve as the cathode generally tends to be unstable.

However, according to the driving method of the plasma display panel of the embodiment of the present invention, in order to stabilize the initializing discharge of the unstable data electrodes D _{1 to} D _m , the secondary electron emission coefficient of the phosphor is changed. The drive which supplies sufficient priming which can compensate for smallness is performed. It first generates discharge in the second initialization period, i.e. sustain electrodes SU ₁ to SU _n is priming with initializing discharge becomes a cathode. The protective layer (protective layer 8 in FIG. 1) covering scan electrodes SC ₁ -SC _n or sustain electrodes SU ₁ -SU _n is an MgO thin film, and MgO has a large secondary electron emission coefficient and a small discharge delay. It is known to produce a stable discharge. Thus even with a small though priming discharge to the cathode sustain electrodes SU ₁ to SU _n in the second initialization period is relatively stable discharge. And because subsequent initializing discharge data electrodes D ₁ to D _m is the discharge of the sustain electrodes SU ₁ to SU _n are generated while continuing, priming generated becomes a discharge in which continue to be supplied, fluorescent Despite the discharge of the body serving as the cathode, the discharge is stable. Here, the discharge of the first initialization period is intended for starting earlier than discharge discharge sustain electrodes SU ₁ to SU _n-side of the data electrodes D ₁ to D _m side second initialization period .

FIG. 4 is another driving waveform diagram of the plasma display panel driving method according to the embodiment of the present invention. Thus, after the first initialization discharge, when the second initialization discharge is started without taking a rest period, the initialization discharge can be further stabilized. Since the discharge generated in the first initialization period uses the scan electrodes SC _{1 to} SC _n having the MgO thin film as cathodes, the discharge is relatively stable even if the priming is small. The priming generated by this discharge becomes the priming for the initializing discharge of the sustain electrodes SU _{1 to} SU _n in the second initializing period, and this discharge is further stabilized. And because subsequent initializing discharge data electrodes D ₁ to D _m is the discharge of the sustain electrodes SU ₁ to SU _n are generated while continuing, a stable discharge as described above.

As described above, the initialization discharge of the data electrodes D _{1 to} D _m , which generally has a large discharge delay and the discharge tends to become unstable, in particular, precedes the initialization discharge in which the phosphor layer side becomes the cathode in the second initialization period. and by generating priming by initializing discharge sustain electrodes SU ₁ to SU _n are, it is possible to supply sufficient priming between the scan electrodes SC ₁ to SC _n and data electrodes D ₁ to D _m, The discharge delay of the initializing discharge of the data electrodes D _{1 to} D _m can be reduced and the discharge can be stabilized. Therefore, the wall charge adjustment in the subsequent third initialization period is also stable, leading to stable address operation and sustain operation, and good image display without erroneous discharge becomes possible.

In the description above, in order to first to initiate the discharge of the sustain electrodes SU ₁ to SU _n side, then allowed to start discharging of the data electrodes D ₁ to D _m-side in the second initialization period, first the voltage Vq to be applied to the sustain electrodes SU ₁ to SU _n in the initialization period is set higher than the voltage Ve applied to the sustain electrodes SU ₁ to SU _n to a third initialization period. However other than this, as a discharge to be generated in the second initialization period, after starting the discharge of a cathode sustain electrodes SU ₁ to SU _n, start discharge to the cathode of data electrodes D ₁ to D _m Can be made. For example, by further lowering the voltage (0 (V) in the embodiment of the present invention) applied to sustain electrodes SU ₁ -SU _n in the second initialization period, scan electrodes SC ₁ -SC _n and sustain electrodes The potential difference between SU _{1 to} SU _n is increased, and the start of discharge on the sustain electrodes SU _{1 to} SU _n side can be accelerated. Or (in the embodiment of the present invention 0 (V)) voltage applied to the data electrodes D ₁ to D _m in the second initialization period scan electrodes SC ₁ by raising to SC _n and data electrodes D ₁ ~ can delay the discharge start potential difference is small it becomes data electrodes D ₁ to D _m side between D _m. Of course, a driving waveform may be designed by combining any of these methods.

  Further, since each electrode of the AC type PDP is surrounded by a dielectric layer and insulated from the discharge space, the direct current component does not contribute to the discharge itself. Therefore, it goes without saying that the same effect can be obtained even if a waveform obtained by adding a DC component to the drive waveform described in the embodiment of the present invention is used.

  Further, in the embodiment of the present invention, one field period is composed of a plurality of subfields having an initialization period, an address period, and a sustain period, and the initialization period of the first subfield is an all discharge cell related to image display. The second subfield is a subfield having a selective initializing period for selectively initializing discharge cells that have undergone a sustain discharge. . However, the present invention is similarly applied to a subfield configuration in which only a subfield having an all-cell initializing period or a subfield having an all-cell initializing period and a subfield having a selective initializing period are arbitrarily combined. can do.

  FIG. 5 is a circuit block diagram of an example of a driving apparatus using the plasma display panel driving method according to the embodiment of the present invention. The driving device 100 according to the embodiment of the present invention includes an image signal processing circuit 101, a data electrode driving circuit 102, a timing control circuit 103, a scan electrode driving circuit 104, and a sustain electrode driving circuit 105. The image signal and the synchronization signal are input to the image signal processing circuit 101. The image signal processing circuit 101 outputs to the data electrode driving circuit 102 a subfield signal for controlling whether or not each subfield is lit based on the image signal and the synchronization signal. The synchronization signal is also input to the timing control circuit 103. The timing control circuit 103 outputs a timing control signal to the data electrode driving circuit 102, the scan electrode driving circuit 104, and the sustain electrode driving circuit 105 based on the synchronization signal.

The data electrode driving circuit 102 applies the driving waveform shown in FIG. 3 to the data electrodes 10 (data electrodes D _{1 to} D _m in FIG. 3) in accordance with the subfield signal and the timing control signal. Scan electrode drive circuit 104 applies the drive waveform shown in FIG. 3 to scan electrodes 5 (scan electrodes SC _{1 to} SC _n in FIG. 3) in response to the timing control signal, and sustain electrode drive circuit 105 receives the timing control signal. Accordingly, the drive waveforms shown in FIG. 3 are applied to the sustain electrodes 6 (SU ₁ to SU _n in FIG. 3) of the panel. The data electrode driving circuit 102, the scan electrode driving circuit 104, and the sustain electrode driving circuit 105 are supplied with necessary power from a power supply circuit (not shown).

  By providing the above circuit block, a driving device using the panel driving method in the embodiment of the present invention can be configured.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the drive method of the plasma display panel which enables the stable initializing discharge in the initializing period.

1 is an exploded perspective view showing a structure of a plasma display panel used in an embodiment of the present invention. Electrode arrangement diagram of plasma display panel used in the embodiment of the present invention Driving waveform diagram of driving method of plasma display panel in accordance with exemplary embodiment of the present invention Other driving waveform diagrams of the plasma display panel driving method according to the embodiment of the present invention FIG. 1 is a circuit block diagram of an example of a driving apparatus using a plasma display panel driving method according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plasma display panel 2 Front plate 3 Back plate 4 Front glass substrate 5 Scan electrode 6 Sustain electrode 7 Dielectric layer 8 Protective layer 9 Back glass substrate 10 Data electrode 11 Dielectric layer 12 Partition 13 Phosphor layer 15 Discharge cell 100 Drive device

Claims (1)

A method of driving a plasma display panel, comprising: a plurality of scan electrodes and a plurality of sustain electrodes arranged in parallel to each other; and a plurality of data electrodes arranged in a direction crossing the scan electrode.
One field is composed of a plurality of subfields having an initialization period, an address period, and a sustain period,
An initialization period of at least one subfield of the plurality of subfields includes a first initialization period, a second initialization period, and a third initialization period,
In the first initialization period, the data electrode is held at 0 (V) and a positive voltage Vq is applied to the sustain electrode, and the scan electrode is connected to the data electrode and the sustain electrode. By applying a downward ramp waveform voltage that gradually falls from the voltage not exceeding the discharge start voltage to the voltage exceeding the discharge start voltage between the sustain electrode and the sustain electrode, To generate an anode discharge,
In the second initialization period, a voltage that does not exceed a discharge start voltage between the data electrode and the sustain electrode while the data electrode and the sustain electrode are held at 0 (V), respectively. By applying an upward ramp waveform voltage that gradually increases toward the voltage exceeding the discharge start voltage between the data electrode and the sustain electrode, the sustain electrode and the data electrode are used as a cathode, and the scan electrode is used as an anode. Causing a discharge,
In the third initialization period, the data electrode is held at 0 (V), and a positive voltage Ve lower than the positive voltage Vq is applied to the sustain electrode, and the data is applied to the scan electrode. By applying a downward ramp waveform voltage that gradually falls from the voltage that is equal to or lower than the discharge start voltage between the electrode and the sustain electrode toward the voltage that exceeds the discharge start voltage between the data electrode and the sustain electrode, Generating a discharge with the scan electrode as a cathode and the sustain electrode and the data electrode as an anode;
In addition, the discharge generated in the second initialization period is configured to start discharge using the sustain electrode as a cathode and then start discharge using the data electrode as a cathode. Panel drive method.

Images