JP2006171181A - Plasma display panel driving method and image display device - Google Patents

Abstract

Provided are a plasma display panel driving method and an image display device which improve luminous efficiency by stably generating two continuous discharges.
A plasma display panel driving method including a sustain pulse generator having a power recovery unit and a clamp unit, wherein a voltage is applied to one of display electrodes using a power recovery unit corresponding to the display electrode. In addition, a voltage is applied to the other display electrode using a power recovery unit corresponding to the display electrode, and a voltage is applied to one of the display electrodes using a clamp unit corresponding to the display electrode to perform the first discharge. After the first discharge, a voltage is applied to the other display electrode using a clamp portion corresponding to the display electrode to generate a second discharge.
[Selection] Figure 6

Description

  The present invention relates to a method for driving a plasma display panel and an image display device that display an image by selectively discharging a plurality of discharge cells.

  2. Description of the Related Art In recent years, a plasma display panel (hereinafter abbreviated as “panel”), which has rapidly expanded the market scale, is a display device with excellent visibility characterized by a large screen, a thin shape, and a light weight. However, its luminous efficiency is still low, and various techniques for improving luminous efficiency and reducing power consumption have been proposed.

As a method of increasing the light emission efficiency and reducing the power consumption by the panel driving method, for example, the first driving for generating the first discharge in the discharge cells in the display panel by applying the driving pulse to the plurality of discharge cells. And, after the first discharge is started and the voltage of the drive pulse is decreased, the current from the power source is supplied to the discharge cell to increase the voltage of the decreased drive pulse and continue to the first discharge. There has been proposed a display device (see Patent Document 1) including a second driving unit that generates two discharges. According to this display device, since only the minimum electric power necessary for the discharge is input in the first discharge, the saturation of ultraviolet rays is alleviated by the current limitation from the moment when the first discharge starts to weaken, and the first discharge The luminous efficiency of the discharge is improved. As a result, the first discharge with high luminous efficiency is performed in all the discharge cells to be lit, and the second discharge is also performed, so that the luminous efficiency of all the discharge cells to be lit can be improved.
Japanese Patent No. 3420296

  However, these two continuous discharges, in particular the first discharge, are easily affected by the discharge characteristics and discharge conditions of the individual discharge cells, variations in the circuit components of the drive circuit, and the like. It was not easy to generate a discharge.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a panel driving method and an image display device that have improved luminous efficiency by stably generating two continuous discharges. .

  The present invention includes a panel including a plurality of discharge cells having a pair of display electrodes, and a pair of sustain pulse generators for applying a sustain pulse to each of the display electrodes, each of the sustain pulse generators being a display electrode. Driving a panel having a power recovery unit that applies a voltage by charging and discharging a display electrode by resonance between a capacitance between the capacitor and a power recovery inductor, and a clamp unit that applies a voltage by connecting to a predetermined power source or ground potential A method of applying a voltage to one of the display electrodes using a power recovery unit corresponding to the display electrode and applying a voltage to the other display electrode using a power recovery unit corresponding to the display electrode, A voltage is applied to one of the display electrodes using a clamp portion corresponding to the display electrode to generate a first discharge, and after the first discharge, a clamp corresponding to the display electrode is applied to the other display electrode. And wherein the generating the second discharge by applying a voltage using a. By this method, it is possible to provide a panel driving method in which two continuous discharges are stably generated and the light emission efficiency is improved.

  In the panel driving method of the present invention, it is desirable that the time interval from the generation of the first discharge to the generation of the second discharge be 50 ns or more and 400 ns or less. By this method, the luminous efficiency of the first discharge can be improved and the second discharge can be generated at a low voltage.

  In the panel driving method of the present invention, it is more preferable that the time interval from the generation of the first discharge to the generation of the second discharge is 100 ns or more and 250 ns or less. With this method, the light emission efficiency by the first discharge can be increased to the maximum, and the light emission efficiency by the second discharge can be sufficiently increased.

  Moreover, the image display apparatus of this invention is an image display apparatus characterized by displaying an image using the panel drive method in any one of Claims 1-3. With this configuration, it is possible to provide an image display device that stably generates two continuous discharges and improves the light emission efficiency.

  According to the present invention, it is possible to provide a panel driving method and an image display device with improved luminous efficiency by stably generating two continuous discharges.

  Hereinafter, an image display device according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment)
FIG. 1 is an exploded perspective view showing a structure of a panel used in an image display apparatus according to an embodiment of the present invention. The panel 1 is configured such 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. A plurality of data electrodes 9 covered with an insulator layer 8 are formed on the back substrate 3, and a partition wall 10 is provided in parallel with the data electrodes 9 on the insulator layer 8 between the data electrodes 9. Yes. A phosphor layer 11 is 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 in the direction in which the scan electrodes 4 and the sustain electrodes 5 and the data electrodes 9 intersect, and in the discharge space formed between them, for example, neon And a mixed gas of xenon.

  FIG. 2 is an electrode array diagram of the panel. N scan electrodes SC1 to SCn (scan electrode 4 in FIG. 1) and n sustain electrodes SU1 to SUn (sustain electrode 5 in FIG. 1) are alternately arranged in the row direction, and m data electrodes in the column direction. D1 to Dm (data electrodes 9 in FIG. 1) are arranged. A discharge cell is formed at a portion where a pair of scan electrode SCi and sustain electrode SUi (i = 1 to n) and one data electrode Dj (j = 1 to m) intersect, and the discharge cell is in the discharge space. m × n are formed. As shown in FIGS. 1 and 2, since the scan electrode 4 and the sustain electrode 5 are formed in parallel with each other, a large interelectrode capacitance is formed between the scan electrode 4 and the sustain electrode 5. Exists.

  FIG. 3 is a circuit block diagram of the image display apparatus according to the embodiment of the present invention. The image display device includes a panel 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 image signal processing circuit 18, and a power supply circuit (not shown).

  The image signal processing circuit 18 converts the image signal sig into image data for each subfield. The data electrode driving circuit 12 converts the image data for each subfield into signals corresponding to the data electrodes D1 to Dm, and drives the data electrodes D1 to Dm. The timing generation circuit 15 generates various timing signals based on the horizontal synchronization signal H and the vertical synchronization signal V and supplies them to each circuit block. Scan electrode drive circuit 13 supplies drive voltage waveforms to scan electrodes SC1 to SCn based on timing signals, and sustain electrode drive circuit 14 supplies drive voltage waveforms to sustain electrodes SU1 to SUn based on timing signals. Here, scan electrode drive circuit 13 includes sustain pulse generation unit 100 for generating a sustain pulse, which will be described later, and sustain electrode drive circuit 14 also includes sustain pulse generation unit 200. As will be described in detail later, the sustain pulse generators 100 and 200 are provided with power recovery means in order to recover the electric power associated with the charge / discharge of the interelectrode capacitance between the scan electrode 4 and the sustain electrode 5.

  Next, a driving voltage waveform for driving the panel and its operation will be described. In the embodiment of the present invention, one field is divided into a plurality of subfields, and each subfield has an initialization period, an address period, and a sustain period. FIG. 4 is a waveform diagram of driving voltage applied to each electrode of the panel according to the embodiment of the present invention.

  In the initializing period of the first subfield, the data electrodes D1 to Dm and the sustain electrodes SU1 to SUn are held at 0 (V), and from the voltage Vi1 (V) that is lower than the discharge start voltage with respect to the scan electrodes SC1 to SCn. A ramp voltage that gradually increases toward the voltage Vi2 (V) exceeding the discharge start voltage is applied. Then, the first weak initializing discharge is caused in all the discharge cells, negative wall voltages are stored on scan electrodes SC1 to SCn, and positive walls on sustain electrodes SU1 to SUn and data electrodes D1 to Dm. The voltage is stored. Here, the wall voltage on the electrode refers to a voltage generated by wall charges accumulated on a dielectric layer or a phosphor layer covering the electrode. Thereafter, sustain electrodes SU1 to SUn are maintained at positive voltage Vh (V), and a ramp voltage that gradually decreases from voltage Vi3 (V) to voltage Vi4 (V) is applied to scan electrodes SC1 to SCn. Then, the second weak initializing discharge is caused in all the discharge cells, the wall voltage on scan electrodes SC1 to SCn and the wall voltage on sustain electrodes SU1 to SUn are weakened, and the wall voltage on data electrodes D1 to Dm is reduced. Is also adjusted to a value suitable for the write operation.

  In the subsequent address period, scan electrodes SC1 to SCn are temporarily held at Vr (V). Next, a positive address pulse voltage Vd (V) is applied to the data electrode Dk (k = 1 to m) of the discharge cell to be displayed in the first row among the data electrodes D1 to Dm, and the first row is scanned. Scanning pulse voltage Va (V) is applied to electrode SC1. At this time, the voltage at the intersection between the data electrode Dk and the scan electrode SC1 is obtained by adding the wall voltage on the data electrode Dk and the wall voltage on the scan electrode SC1 to the externally applied voltage (Vd−Va) (V). And the discharge start voltage is exceeded. Then, an address discharge occurs between data electrode Dk and scan electrode SC1 and between sustain electrode SU1 and scan electrode SC1, and a positive wall voltage is accumulated on scan electrode SC1 of this discharge cell, and on sustain electrode SU1. And a negative wall voltage is also accumulated on the data electrode Dk. In this manner, an address operation is performed in which address discharge is caused in the discharge cells to be displayed in the first row and wall voltage is accumulated on each electrode. On the other hand, since the voltage at the intersection of data electrodes D1 to Dm and scan electrode SC1 to which positive address pulse voltage Vd (V) is not applied does not exceed the discharge start voltage, address discharge does not occur. The above address operation is sequentially performed until the discharge cell in the nth row, and the address period ends.

  In the subsequent sustain period, sustain pulse voltage Vs (V) is applied between scan electrodes SC1 to SCn and sustain electrodes SU1 to SUn, and the discharge cells in which wall charges are formed by address discharge are selectively discharged to emit light. However, the details of the sustain pulse voltage Vs (V) and the discharge at this time will be described later, and an outline will be described here. First, 0 (V) is applied to sustain electrodes SU1 to SUn, and positive sustain pulse voltage Vs (V) is applied to scan electrodes SC1 to SCn. In the discharge cell in which the address discharge has occurred at this time, the voltage between scan electrode SCi and sustain electrode SUi is the sustain pulse voltage Vs (V), the wall voltage on scan electrode SCi and the wall voltage on sustain electrode SUi. Exceeds the discharge start voltage. Then, a sustain discharge occurs between scan electrode SCi and sustain electrode SUi, and phosphor layer 11 emits light by the ultraviolet rays generated at this time. Then, a negative wall voltage is accumulated on scan electrode SCi, and a positive wall voltage is accumulated on sustain electrode SUi. At this time, a positive wall voltage is also accumulated on the data electrode Dk. In the discharge cells in which no address discharge has occurred during the address period, no sustain discharge occurs, and the wall voltage state at the end of the initialization period is maintained. Subsequently, 0 (V) is applied to scan electrodes SC1 to SCn, and positive sustain pulse voltage Vs (V) is applied to sustain electrodes SU1 to SUn. Then, in the discharge cell in which the sustain discharge has occurred, since the voltage between sustain electrode SUi and scan electrode SCi exceeds the discharge start voltage, a sustain discharge occurs again between sustain electrode SUi and scan electrode SCi, and the sustain cell is maintained. Negative wall voltage is accumulated on electrode SUi, and positive wall voltage is accumulated on scan electrode SCi. Thereafter, similarly, by applying sustain pulses of the number corresponding to the luminance weight alternately to scan electrodes SC1 to SCn and sustain electrodes SU1 to SUn, the sustain discharge continues in the discharge cells that have caused the address discharge in the address period. Done. Thus, the maintenance operation in the maintenance period is completed.

  The operations in the initialization period, address period, and sustain period in the subsequent subfield are the same as those in the first subfield, and thus description thereof is omitted.

  Here, sustain pulse generators 100 and 200 of scan electrode drive circuit 13 and sustain electrode drive circuit 14 generate the sustain pulses described above during the sustain period and apply them to scan electrode 4 and sustain electrode 5, respectively.

  FIG. 5 is a circuit diagram of sustain pulse generating units 100 and 200 of the image display apparatus according to the embodiment of the present invention. Sustain pulse generation unit 100 includes power recovery unit 110 and clamp unit 120. The power recovery unit 110 includes a power recovery capacitor C10, switching elements Q11 and Q12, backflow prevention diodes D11 and D12, and a power recovery inductor L10. The clamp unit 120 includes a power source VS having a voltage value of Vs (V), and switching elements Q13 and Q14. The power recovery unit 110 and the clamp unit 120 are connected to the scanning electrode 4 that is one end of the interelectrode capacitance Cp of the panel 1. The capacitor C10 has a sufficiently large capacity compared to the interelectrode capacity Cp, and functions as a power source for the power recovery unit 110. Sustain pulse generator 200 has the same circuit configuration as sustain pulse generator 100, and includes power recovery capacitor C20, switching elements Q21 and Q22, backflow prevention diodes D21 and D22, and power recovery inductor L20. A recovery unit 210 and a clamp unit 220 having a power source VS and switching elements Q23 and Q24 are provided.

  FIG. 6 is a timing chart for explaining the operation of sustain pulse generating units 100 and 200 of the image display apparatus according to the embodiment of the present invention. One period of the sustain pulse is divided into eight periods indicated by T1 to T8 in FIG. 6, and each period will be described. Since the sustain pulse applied to scan electrode 4 and the sustain pulse applied to sustain electrode 5 have the same waveform but different phases, the operation from period T5 to period T8 is the operation from period T1 to period T4. This is equivalent to the operation in which the scan electrode 4 and the sustain electrode 5 are interchanged.

(Period T1)
At time t1, switching element Q12 is turned on. Then, the charge on the scan electrode 4 side starts to flow to the capacitor C10 through the inductor L10, the diode D12, and the switching element Q12, and the voltage of the scan electrode 4 starts to decrease. Here, since the inductor L10 and the interelectrode capacitance Cp form a resonance circuit, the voltage of the scan electrode 4 decreases to near 0 (V) at time t3 after the time ½ of the resonance period has elapsed.

(Period T2)
At time t2, switching element Q21 is turned on. Then, a current starts to flow from the power recovery capacitor C20 through the switching element Q21, the diode D21, and the inductor L20, and the voltage of the sustain electrode 5 starts to rise. Again, since the inductor L20 and the interelectrode capacitance Cp form a resonance circuit, the voltage of the sustain electrode 5 rises to near Vs (V) at time t4 after the lapse of half the resonance period.

(Period T3)
As described above, at time t3, the voltage of scan electrode 4 drops to near 0 (V). However, due to the power loss due to the resistance component of the resonance circuit, the voltage of the sustain electrode 5 cannot be lowered to 0 (V). At time t3, switching element Q14 is turned on. Then, since scan electrode 4 is directly grounded through switching element Q14, the voltage of scan electrode 4 is forcibly lowered to 0 (V). At this time, the voltage of the sustain electrode 5 also rises sufficiently and exceeds the discharge start voltage in the discharge cell in which the address discharge has occurred. Therefore, the first discharge is generated by the decrease in the voltage of the scan electrode 4 as a trigger. When the first discharge becomes large to a certain extent and the amount of ultraviolet light emission accompanying the discharge begins to saturate, the current required for the discharge exceeds the current supply capability of the power recovery unit 210 on the sustain electrode 5 side, and the first discharge starts to weaken. As a result, the amount of emitted ultraviolet light with respect to the discharge current is not saturated, and the luminous efficiency is improved.

(Period T4)
Switching element Q23 is turned on at time t4. Then, since sustain electrode 5 is directly connected to power supply VS through switching element Q23, the voltage of sustain electrode 5 is forcibly increased to Vs (V). Then, the voltage rise at this time becomes a trigger, and the second discharge is generated. Since the second discharge is generated while sufficient priming due to the first discharge remains, the second discharge becomes a stable discharge. Further, at the time of the second discharge, the scan electrode 4 is connected to the ground potential, and the sustain electrode 5 is connected to the power source VS, so that the discharge current is not limited and becomes a sufficiently strong discharge, which is necessary for continuing the sustain discharge. Can store a large wall voltage. In the second discharge, since the effective voltage applied to the discharge space is relaxed by the first discharge, that is, in a state where the voltage is relatively low, the light emission efficiency is improved.

  Switching element Q12 may be turned off after time t3 and before time t6, and switching element Q21 may be turned off after time t4 and before time t5. In order to lower the output impedance of sustain pulse generating units 100 and 200, switching element Q14 is preferably turned off immediately before time t6 and switching element Q23 is turned off immediately before time t5.

(Period T5)
At time t5, switching element Q22 is turned on. Then, the charge on the sustain electrode 5 side starts to flow to the capacitor C20 through the inductor L20, the diode D22, and the switching element Q22, and the voltage of the sustain electrode 5 starts to decrease. Here, since the inductor L20 and the interelectrode capacitance Cp form a resonance circuit, the voltage of the sustain electrode 5 decreases to near 0 (V) at time t7 after a time ½ of the resonance period has elapsed.

(Period T6)
At time t6, switching element Q11 is turned on. Then, current starts to flow from the power recovery capacitor C10 through the switching element Q11, the diode D11, and the inductor L10, and the voltage of the scan electrode 4 starts to rise. Also here, since the inductor L10 and the interelectrode capacitance Cp form a resonance circuit, the voltage of the scan electrode 4 rises to near Vs (V) at time t8 after a time ½ of the resonance period has elapsed.

(Period T7)
Switching element Q24 is turned on at time t7. Then, since sustain electrode 5 is directly grounded through switching element Q24, the voltage of sustain electrode 5 is forcibly reduced to 0 (V). Then, the decrease in the voltage of the sustain electrode 5 is triggered to generate a first discharge. When the first discharge becomes large to some extent and the amount of ultraviolet rays emitted due to the discharge begins to saturate, the current required for the discharge exceeds the current supply capability of the power recovery unit 110 on the scan electrode 4 side, and the first discharge starts to weaken. As a result, the amount of emitted ultraviolet light with respect to the discharge current is not saturated, and the luminous efficiency is improved.

(Period T8)
Switching element Q13 is turned on at time t8. Then, since scan electrode 4 is directly connected to power supply VS through switching element Q13, the voltage of scan electrode 4 is forcibly increased to Vs (V). Then, the voltage rise at this time becomes a trigger, and the second discharge is generated. Since the second discharge is generated while sufficient priming due to the first discharge remains, the second discharge is a stable discharge. In the second discharge, the sustain electrode 5 is connected to the ground potential, and the scan electrode 4 is connected to the power source VS, so that the discharge is sufficiently strong to store the necessary wall voltage. In addition, the second discharge is a discharge with a relatively low effective voltage applied to the discharge space and high luminous efficiency.

  Note that the switching element Q22 may be turned off after time t7 and before time t2, and the switching element Q11 may be turned off after time t8 and before time t1. Further, it is desirable that the switching element Q24 is turned off immediately before time t2, and the switching element Q13 is turned off immediately before time t1.

  Although the mechanism by which the light emission efficiency is improved by the sustain discharge in the embodiment of the present invention has not been completely elucidated, the ultraviolet discharge amount is not saturated in the first discharge, and the second discharge is effective. It is considered that the light emission efficiency is improved because the discharge is generated at an extremely low voltage.

  In order to improve the light emission efficiency of the first discharge, it is desirable to raise the output voltage again to generate the second discharge after the first discharge is weakened, and this is used in this embodiment. In the case of a panel, the time interval between the first discharge peak and the second discharge peak is preferably 50 ns or more. Further, in order to generate the second discharge at a low voltage, it is desirable to increase the voltage applied to the electrode while the priming effect by the first discharge is obtained, thereby generating the second discharge. In the case of the panel used in this embodiment, the time interval between the first discharge peak and the second discharge peak is preferably 400 ns or less.

  Therefore, it is desirable that the time interval between the first discharge peak and the second discharge peak be 50 ns or more and 400 ns or less. Furthermore, when the time interval between the peaks of the two discharges is set to 100 ns or more and 250 ns or less, the light emission efficiency by the first discharge can be almost maximized and the light emission efficiency by the second discharge can be sufficiently increased. Can do. In the present embodiment, the sustain pulse repetition period is set to 5.4 μs, the time interval between the peaks of the two discharges is set to 150 ns, and half of the resonance period of the power recovery units 110 and 210 is set to about 900 ns. .

  FIG. 7 is a diagram showing an applied voltage waveform of a sustain pulse and an actual measurement value of light emission intensity at that time in the image display device according to the embodiment of the present invention. Thus, the actual measurement values of the applied voltage waveforms at the electrode terminal portions of scan electrode 4 and sustain electrode 5 are different from the voltage waveforms shown in FIG. In particular, the rise time of the sustain pulse seems to be greatly delayed from t2 or t6. This is because the interelectrode capacitance Cp is driven from both sides of the scan electrode 4 side and the sustain electrode 5 side at the same time, so that it is pulled by the drive waveform on the electrode side where the voltage changes first, and the drive waveform on the electrode side where the voltage changes later. This is because the change in the image appears delayed. However, the voltage difference between the voltage applied to scan electrode 4 and the voltage applied to sustain electrode 5 (the voltage indicated by “scan electrode-sustain electrode” in FIG. 7) is between scan electrode 4 and sustain electrode 5. A sufficient voltage is applied to the discharge cell, and the first discharge is stably generated at time t3 or t7 after the discharge start voltage is exceeded in the discharge cell in which the address discharge has occurred. As described above, the first discharge is generated after the voltage between the display electrodes of the discharge cells to be sustained discharge exceeds the discharge start voltage between the display electrodes. Therefore, in the so-called erase discharge generated between the data electrode and the scan electrode. It can be seen that the sustain discharge occurs between the display electrodes. Then, the second discharge is stably generated after 150 ns.

  Thus, it is desirable that the luminous efficiency is stably set to an optimal value for the time interval between the two discharge peaks. In particular, the first discharge, which is the first discharge, is easily affected by individual discharge characteristics, and is also easily affected by driving conditions such as the lighting rate, so that the first discharge can be generated accurately at a desired time. Although it is not easy, in the embodiment of the present invention, a voltage is applied to one of the display electrodes using the power recovery unit corresponding to the display electrode in the periods T2 and T6 and the display is also displayed on the other display electrode. By applying a voltage using the power recovery unit corresponding to the electrode and applying a voltage to one of the display electrodes using the clamp unit corresponding to the display electrode at time t3 and t7 to generate the first discharge The first discharge can be stably generated at a desired time. Then, after the first discharge, at time t4 and t8, the second discharge is generated by applying a voltage to the other of the display electrodes using the clamp portion corresponding to the display electrode to generate the second discharge. As a result, the time interval between the two discharges can be stably generated at a desired time interval.

  Thus, since the light emission efficiency can be improved by performing the first and second discharges continuously, the light emission efficiency with respect to the input power can be improved and the power consumption can be reduced. Alternatively, the power saved by improving the light emission efficiency can be used to improve display luminance by increasing the number of times of light emission.

  In the embodiment of the present invention, first, the voltage of one display electrode is forcibly reduced to 0 (V) to generate a first discharge, and then the voltage of the other display electrode is forcibly set. Although it has been described that the second discharge is generated by increasing the voltage to Vs (V), first, the voltage of one display electrode is forcibly increased to Vs (V) to generate the first discharge, and then Even if the voltage of the other display electrode is forcibly lowered to 0 (V) to generate the second discharge, the same effect as in the present invention can be obtained.

  The panel driving method and the image display apparatus of the present invention can improve luminous efficiency by stably generating two continuous discharges, and display an image by selectively discharging a plurality of discharge cells. It is useful as a panel driving method and an image display device.

1 is an exploded perspective view showing a structure of a panel used in an image display device in an embodiment of the present invention. Electrode array diagram of panel used in the image display device Circuit block diagram of the image display device Drive voltage waveform diagram applied to each electrode of the panel used in the image display device Circuit diagram of sustain pulse generator of image display device Timing chart for explaining the operation of the sustain pulse generator of the image display device The figure which shows the applied voltage waveform of the sustain pulse of the image display apparatus, and the measured value of the emitted light intensity at that time

Explanation of symbols

1 Panel 2 Front substrate 3 Back substrate 4 Scan electrode (display electrode)
5 Maintenance electrode (display electrode)
DESCRIPTION OF SYMBOLS 9 Data electrode 12 Data electrode drive circuit 13 Scan electrode drive circuit 14 Sustain electrode drive circuit 100,200 Sustain pulse generation part 110,210 Power recovery part 120,220 Clamp part

Claims (4)

A plasma display panel having a plurality of discharge cells having a pair of display electrodes, and a pair of sustain pulse generators for applying a sustain pulse to each of the display electrodes, each of the sustain pulse generators, A power recovery unit that charges and discharges the display electrodes by resonance between a capacitance between the display electrodes and a power recovery inductor and applies a voltage; and a clamp unit that applies a voltage by connecting to a predetermined power supply or ground potential A plasma display panel driving method comprising:
Applying a voltage to one of the display electrodes using a power recovery unit corresponding to the display electrode and applying a voltage to the other display electrode using a power recovery unit corresponding to the display electrode,
A voltage is applied to one of the display electrodes using a clamp portion corresponding to the display electrode to generate a first discharge,
A method of driving a plasma display panel, wherein after the first discharge, a voltage is applied to the other of the display electrodes using a clamp portion corresponding to the display electrode to generate a second discharge. 2. The method of driving a plasma display panel according to claim 1, wherein a time interval from when the first discharge is generated to when the second discharge is generated is not less than 50 ns and not more than 400 ns. 2. The method of driving a plasma display panel according to claim 1, wherein a time interval from the generation of the first discharge to the generation of the second discharge is 100 ns or more and 250 ns or less. An image display apparatus that displays an image using the method for driving a plasma display panel according to claim 1.

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