JP2002366090A - Driving method of plasma display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overcome the problem in which sustaining electric discharging is not sustained in a succeeding subfield by the electric discharge generated while transitioning to a writing interval following a sustaining interval. SOLUTION: Prior to a writing interval, a pulse 1 is applied to make the potential of a sustain side electrode 32 higher than the potential of a scan side electrode 31 and an electric discharging 10 is conducted prior to the transition to the writing interval. Due to the discharging, negative electric charges are gathered in the vicinity of the electrode 32 having a higher potential than the potential of the electrode 31 and accumulated on a protective film. Thus, no unnecessary electric discharging is generated by the negative electric charges even though the potential of the electrode 32 is made higher than the potential of the electrode 31 during a writing interval.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a surface discharge AC type plasma display driving method.

[0002]

2. Description of the Related Art FIG. 7 is a schematic view of a cell structure of a general conventional AC discharge type plasma display. On the surface of the front glass substrate 40, scan-side electrodes 31a and 31b and a sustain-side electrode 32 are arranged in parallel.
And the protective film 42. The data-side electrode 30 is disposed on the surface of the back glass substrate 44 in a direction perpendicular to the scan-side electrode 31 and the sustain-side electrode 32, and is covered by the dielectric 45, the cell partition 43, and the phosphor 46. A cell 48 is formed where the scan-side electrode 31 and the sustain-side electrode 32 intersect with the data-side electrode 30, and a discharge gas 47 is sealed in the space.

FIG. 8 shows a driving waveform of a general conventional AC discharge type plasma display.

First, by applying an initialization pulse Pset to all scan-side electrodes 31 during the initialization period, a preliminary discharge 20 is generated in all cells 48, and the subsequent write discharge is promoted.

Next, in the writing period, the scanning pulse Pscn
Are sequentially applied to the scan-side electrodes 31a and 31b, and a write pulse Pw corresponding to a video signal is applied to the data-side electrode 30. The write discharge 21 is generated in the cell 48 to which the scan pulse Pscn and the write pulse Pw are simultaneously applied, and the wall charges are accumulated on the surface of the protective film 42.

Next, in the sustain period, the scan side electrode 31 is
When the sustain pulse Vsus is applied to the sustain electrode 32, the sustain discharge 22 is generated by the wall charges accumulated during the writing period, and the phosphor 46 emits light. However, since the write discharge 21 does not occur in the cell 48 to which the write pulse Pw has not been applied simultaneously with the scan pulse Pscn during the write period, no wall charge is accumulated by the write discharge. Therefore, even if the sustain pulse Vsus is applied, the sustain discharge 22 is not performed and no light is emitted.

Finally, in the erasing period, the erasing discharge Pe is performed by the erasing pulse Pe in the sustaining period to reduce wall charges accumulated in the sustaining period, and the sustaining discharge 22 is not generated even if the sustaining pulse Psus is applied next. I do.

By repeating the initialization period, the writing period, the sustaining period and the erasing period for each subfield, an image is displayed in one field.

In the above-described plasma display driving method, when the sustain discharge is performed in all subfields in one field, the write pulse P is applied in all subfields.
The write discharge 21 must be performed by applying w. Therefore, the number of times of applying the write pulse Pw increases, and power consumption increases.

Next, a description will be given of a driving method of a plasma display for reducing power consumption by the writing pulse Pw when sustain discharge is continuously performed in a plurality of continuous subfields.

FIG. 9 shows a driving waveform of the plasma display at this time.

This waveform has the same effects as the waveforms in the initialization period, the writing period / sustain period, and the erasing period as in the above-described example, but differs from the driving method of FIG. And no erasure period,
It is characterized in that a transition is made directly from the sustain period to the write period. In this driving method, the wall charge generated by the sustain discharge 22 is maintained until the sustain period of the subsequent subfield by eliminating the initialization period and the erase period,
When the sustain pulse is applied, the sustain discharge 22 is generated at any time. Thus, the sustain discharge 24 can be performed in the subsequent sustain period without performing the write discharge.

[0013]

However, in the above-described driving method, the sustain-side electrode 3 is not used during the writing period.
Unnecessary discharge occurs when the potential of 2 is increased. This will be described with reference to FIG.

FIG. 6 is a diagram showing the drive waveforms during the transition from the sustain period to the write period and the waveform of the potential difference between the sustain electrode 32 and the scan electrode 31 when the initialization period and the erase period are eliminated.

In the sustain period, the sustain pulse Psus is applied and the sustain discharge 12 is performed, so that charges are accumulated on the surface of the protective film 42. When the waveform of the potential difference between the sustain electrode 32 and the scan electrode 31 is in the positive direction,
That is, if the sustain discharge 12 occurs when the potential of the sustain electrode 32 is higher than the potential of the scan electrode 31, negative charges are accumulated on the surface of the protective film 42 near the sustain electrode 32 so as to cancel the potential difference, Conversely, when the waveform of the potential difference between the sustain side electrode 32 and the scan side electrode 31 is in the negative direction, that is, when the potential of the sustain side electrode 32 is lower than the potential of the scan side electrode 31, the sustain discharge 12 occurs. If so, the protective film 42 near the sustain-side electrode 32
Positive charges are accumulated on the surface.

In FIG. 6, the last sustain pulse Psus
Accordingly, the sustain discharge 12 is generated when the waveform of the potential difference between the sustain-side electrode 32 and the scan-side electrode 31 is in the negative direction, so that positive charges are accumulated on the surface of the protective film 42 near the sustain-side electrode 32.

After that, since the process proceeds to the writing period while the positive charges are accumulated, when the voltage V1 is applied to the sustain electrode 32, an unnecessary discharge 11 may be generated.

When the voltage V1 is low, the discharge 11 occurs in a state where the potential difference between the sustain side electrode 32 and the scan side electrode 31 is small.
The wall charges accumulated on the surface of the protective film 42 near 2 are reduced, and even if a sustain pulse is applied in the sustain period of the subsequent subfield, the sustain discharge is not sufficiently performed and the discharge is interrupted or weak. Therefore, the lighting display state is significantly deteriorated.

Next, a driving method for performing write / erase discharge will be described. In this driving, when the writing pulse Pw and the scanning pulse Pscn are applied in the writing period and a discharge occurs, the voltage V1 is lowered, and the potential difference between the sustain-side electrode 32 and the scan-side electrode 31 is reduced. And the sustain discharge is stopped. In this driving method as well, the sustain discharge 12 is generated when the waveform of the potential difference between the sustain electrode 32 and the scan electrode 31 is in the negative direction by the last sustain pulse Psus in the sustain period. Positive charges are accumulated on the surface 42. Thereafter, since the process proceeds to the writing period while the positive charges are accumulated, when the voltage V1 is applied to the sustain electrode 32, an unnecessary discharge 11 may be generated. Therefore, similarly to the case of performing the above-described write discharge, wall charges accumulated on the surface of the protective film 42 near the sustain-side electrode 32 become insufficient, and even if a sustain pulse is applied during the sustain period of the subsequent subfield. The sustain discharge is not sufficiently performed, and the discharge is interrupted or weak. Therefore, the lighting display state is significantly deteriorated. Therefore, even the driving method for performing the writing / erasing discharge has the same problem as the driving method for performing the writing discharge.

[0020]

In order to solve the above problems, a plasma display driving method according to the present invention comprises a plurality of first column electrodes and a plurality of second column electrodes. And a sustain period in which a sustain pulse is applied to the first column electrode and the second column electrode to emit sustain light by applying a sustain pulse to the first column electrode and the second column electrode. A method for driving a plasma display, comprising: maintaining a potential of the first column electrode at a higher potential than a potential of the second column electrode in a last portion of the sustain period or a portion subsequent to the sustain period,
A transition is made to the writing period.

Further, in the plasma display driving method according to the present invention, lighting is performed in a plurality of continuous subfields within one field period, and one of the plurality of continuous subfields in which the writing discharge is not performed is one.
After maintaining the potential of the first column electrode higher than the potential of the second column electrode at the end of the sustain period or a portion subsequent to the sustain period, the process proceeds to the write period. It is characterized by the following.

Further, in the plasma display driving method according to the present invention, the lighting is maintained over a plurality of subfields until the writing / erasing discharge is performed during the writing period, and the lighting is continued after the last part of the sustaining period or the sustaining period. After the potential of the first column electrode is maintained at a higher potential than the potential of the second column electrode in a portion, the writing period is started.

Further, in the plasma display driving method according to the present invention, the potential of the first column electrode is higher than the potential of the second column electrode at the end of the sustain period or a portion subsequent to the sustain period. The first that occurs when maintained
The first voltage difference between the column electrode and the second column electrode is larger than the potential difference between the first electrode and the second electrode when the scan pulse is not applied during the writing period. It is characterized by.

Further, in the plasma display driving method according to the present invention, the time during which the first voltage difference is generated is at least １ ／ of the period of the sustain pulse.

Also, in the plasma display driving method according to the present invention, when the first voltage difference is generated between the first column electrode and the second column electrode, the first voltage difference may be reduced to the first voltage difference. The amount of change in the potential difference between the first column electrode and the second column electrode is 15 V / μs or more.

Further, in the plasma display driving method according to the present invention, after the sustain pulse is applied to the first column electrode, the operation shifts to the writing period.

Further, a plasma display driving apparatus according to the present invention uses one or more of the plasma display driving methods according to the first to seventh aspects.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A plasma display driving method according to the present invention (claim 1) includes a scan-side electrode and a sustain-side electrode, and applies a scan pulse to the scan-side electrode to perform a write discharge or a write-erase discharge. What is claimed is: 1. A method for driving a plasma display, comprising: a writing period to be performed; and a sustain period in which a sustain pulse is applied to a sustain electrode and a scan electrode to perform sustain light emission. , The sustain-side electrode is maintained at a higher potential than the potential of the sustain-side electrode. Therefore, the sustain discharge in the subsequent subfield can be continued without changing the wall charges accumulated in the sustain period by unnecessary discharges other than the write discharge in the write period.

In the plasma display driving method according to the present invention (claim 2), when lighting is performed in a plurality of continuous subfields within one field period, a subfield in which writing discharge is not performed among a plurality of continuous subfields is performed. At least one is provided, and the potential of the sustain-side electrode is maintained at a higher potential than the potential of the scan-side electrode in the last part of the sustain period or a part subsequent to the sustain period. Therefore, the sustain discharge in the subsequent subfield can be continued without changing the wall charges accumulated in the sustain period by unnecessary discharges other than the write discharge in the write period.

According to the plasma display driving method of the present invention (claim 3), the lighting is maintained over a plurality of subfields until the writing / erasing discharge is performed during the writing period, and the last part of the sustaining period or the part following the sustaining period is maintained. , The sustain-side electrode is maintained at a higher potential than the scan-side electrode. Therefore, the wall charges accumulated in the sustain period are not changed by unnecessary discharges other than the write discharge in the write period,
The sustain discharge in the subsequent subfield can be maintained.

According to the plasma display driving method of the present invention (claim 4), the scan that occurs when the potential of the sustain-side electrode is maintained at a higher potential than the potential of the scan-side electrode at the end of the sustain period or a portion subsequent to the sustain period. The first voltage difference between the electrode and the sustain electrode is larger than the potential difference between the scan electrode and the sustain electrode when the scan pulse is not applied during the writing period. Therefore, the sustain discharge in the subsequent subfield can be continued without changing the wall charges accumulated in the sustain period by unnecessary discharges other than the write discharge in the write period.

In the plasma display driving method according to the present invention (claim 5), the time during which the first voltage difference is generated is at least half the period of the sustain pulse.
Therefore, the charge generated by the discharge by applying the first voltage is accumulated on the surface of the protective film near the sustain-side electrode, and the sustain discharge in the subsequent subfield can be continued.

According to the plasma display driving method of the present invention (claim 6), when the first voltage difference is generated between the scan side electrode and the sustain side electrode, the amount of change in the potential difference between the sustain side electrode and the scan side electrode is It is 15 V / μs or more. Therefore, it is possible to prevent a discharge from occurring in a state where the potential difference between the scan-side electrode and the sustain-side electrode at the rising of the first voltage is low, and to sustain the sustain discharge in the subsequent subfield.

The driving method of the plasma display according to the present invention (claim 7) is characterized in that, after a sustain pulse is applied to the sustain-side electrode, the operation shifts to a writing period. Therefore, the sustain discharge in the subsequent subfield can be sustained without changing the wall charges accumulated in the sustain period by unnecessary discharges other than the write discharge in the write period, and a circuit for using the sustain pulse can be provided. An increase in scale can be suppressed.

A plasma display driving apparatus according to the present invention (claim 8) uses at least one of the plasma display driving methods described in claims 1 to 7. Therefore, the sustain discharge in the subsequent subfield can be continued without changing the wall charges accumulated in the sustain period by unnecessary discharges other than the write discharge in the write period.

(Embodiment 1) Embodiment 1 of the present invention will be described below with reference to FIGS. 1, 5, 6, and 7. FIG.

FIG. 7 is a schematic view of a cell structure of a general conventional AC discharge type plasma display. Scan-side electrodes 31 a and 31 b and a sustain-side electrode 32 are arranged in parallel on the surface of the front glass substrate 40, and are covered with a dielectric 41 and a protective film 42. The data-side electrode 30 is disposed on the surface of the back glass substrate 44 in a direction perpendicular to the scan-side electrode 31 and the sustain-side electrode 32, and is covered by the dielectric 45, the cell partition 43, and the phosphor 46. Scan-side electrode 31 and sustain-side electrode 3
A cell 48 is formed where the data electrode 2 and the data-side electrode 30 intersect, and a discharge gas 47 is sealed in the space.

FIG. 6 is a diagram showing driving waveforms of a general conventional plasma display.

By shifting from the sustain period to the write period of the subsequent subfield in the continuous subfields, the wall charges generated by the sustain discharge 12 are maintained until the sustain period of the subsequent subfield, and the write discharge is not performed. In the subsequent subfield, sustain discharge 12 is continuously generated. However, when the sustain period shifts to the writing period, since the positive charge remains accumulated on the surface of the protective film 42 near the sustain-side electrode 32, when the voltage V1 is applied to the sustain-side electrode 32, an unnecessary discharge 11 is generated. Occurs. When the voltage V1 is low, the discharge 11 occurs in a state where the potential difference between the sustain-side electrode 32 and the scan-side electrode 31 is small, so that the wall charges accumulated after the discharge are insufficient and the discharge 11 occurs during the sustain period of the subsequent subfield. Even if the sustain pulse is applied, the sustain discharge is not sufficiently performed, and the discharge is interrupted or weakened, and the lighting display state is significantly deteriorated.

FIG. 1 is a timing chart of driving waveforms during a transition from a sustain period to a writing period, showing the driving method according to the first embodiment of the present invention.

In the sustain period, the sustain pulse Psus is alternately applied to the scan side electrode 31 and the sustain side electrode 32.
To perform sustain discharge.

In the writing period, a DC voltage is applied to the sustain-side electrode 32, and a scan pulse Pscn is applied to the scan-side electrode 31 to perform a writing discharge. Further, pulse 1 is applied to the sustain-side electrode before the transition to the writing period.

FIG. 5 is a diagram for explaining a driving method according to the first embodiment of the present invention.

In the sustain period, the last sustain pulse Psu
Due to s, a sustain discharge is generated in a state where the potential of the scan side electrode 31 is higher than the potential of the sustain side electrode 32, so that positive charges are accumulated on the surface of the protective film 42 near the sustain side electrode 32.

Thereafter, a pulse 1 for increasing the potential of the sustain-side electrode 32 compared to the potential of the scan-side electrode 31 is applied, and a discharge 10 is performed before the transition to the writing period.
Due to the discharge 10, negative charges are collected near the sustain-side electrode 32 having a higher potential than the scan-side electrode 31, and the negative charges are accumulated on the surface of the protective film 42. Even if the potential of the sustain-side electrode 32 becomes higher than the potential of the scan-side electrode 31 during the writing period due to the negative charge, unnecessary discharge does not occur. In addition, since the negative charges continue to be accumulated over successive subfields, when a sustain pulse is applied to the scan-side electrode in a subsequent subfield, discharge starts, and the sustain discharge can be sustained.

Further, by increasing the voltage of the pulse 1, the potential of the sustain side electrode 32 is changed to the scan side electrode 3.
Since the state is higher than the potential of No. 2, a large amount of negative charges can be accumulated, and a stable sustain discharge can be obtained in the subsequent subfield.

Although the driving method in the case where the writing discharge is performed has been described above, even in the case where the writing and erasing discharge is performed, the potential of the sustain-side electrode 32 is higher than the potential of the scan-side electrode 31 as described above. By applying the pulse 1 to generate a negative charge near the sustain-side electrode 32, the sustain discharge can be continued in the subsequent subfield.

(Embodiment 2) Embodiment 2 of the present invention will be described below with reference to FIG. 1, FIG. 2 and FIG.

FIG. 7 is a schematic diagram of a cell structure of a general conventional AC discharge type plasma display, which is the same as that described in the first embodiment.

FIG. 1 is a time chart of driving waveforms during a transition from a sustain period to a writing period, showing the driving method according to the first embodiment of the present invention.

The effect of this waveform is the same as that described in the first embodiment. However, when the pulse width of pulse 1 is narrow, the negative charges generated by the discharge generated when pulse 1 is applied cause the negative charges to sustain. Since the voltage applied to the sustain-side electrode 32 drops to the voltage V1 before moving to the surface of the protective film 42 near the side electrode 32 and being accumulated, the amount of charge moving to the surface of the protective film 42 is reduced, and negative charges are sufficiently accumulated. Not done. As a result, the sustain discharge cannot be sustained even if the sustain pulse Psus is applied in the subsequent subfield.

FIG. 2 is a timing chart of driving waveforms during a transition from a sustain period to a writing period, showing the driving method according to the second embodiment of the present invention.

The effect of the pulse 2 in this waveform is to make the voltage of the sustain-side electrode 32 higher than V1 before the transition to the writing period, so that the sustain discharge can be performed without writing even in the subsequent subfield. The possible point is the same as the effect of the pulse 1 described in the first embodiment, but is characterized in that the width of the pulse 2 is equal to or larger than the sustain pulse width.

By setting the width of the pulse 2 to be equal to or larger than the sustain pulse width, the voltage applied to the sustain-side electrode 32 is maintained until the negative charge generated by the discharge moves to the surface of the protective film 42 near the sustain-side electrode 32. It is maintained at a voltage higher than the voltage of V1. As a result, the sustain-side electrode 32
Since many negative charges are accumulated on the surface of the protective film 42 in the vicinity, a discharge occurs when the sustain pulse Psus is applied in the subsequent subfield, and the sustain discharge can be sustained.

(Embodiment 3) Embodiment 3 of the present invention will be described below with reference to FIGS. 1, 3 and 7.

FIG. 7 is a schematic diagram of a cell structure of a general conventional AC discharge type plasma display, which is the same as that described in the first embodiment.

FIG. 1 is a time chart of driving waveforms during the transition from the sustain period to the writing period, showing the driving method according to the first embodiment of the present invention.

The effect of this waveform is the same as that described in the first embodiment. However, when the rising of the pulse 1 has a gentle slope, the discharge occurs in the middle of the rising. -The potential difference between the sustain-side electrodes becomes insufficient, and the negative charges accumulated on the surface of the protective film 42 near the sustain-side electrodes 32 decrease. Therefore, even if the sustain pulse Psus is applied in the subsequent subfield, the discharge becomes weak, and the sustain discharge cannot be sustained.

FIG. 3 is a timing chart of driving waveforms during a transition from a sustain period to a writing period, showing a driving method according to the third embodiment of the present invention.

The effect of the pulse 3 in this waveform is to make the voltage of the sustain side electrode 32 higher than V1 before the transition to the writing period, so that the sustain discharge can be performed without writing even in the subsequent subfield. The possible point is the same as the effect of the pulse 1 described in the first embodiment, but is characterized in that the voltage change amount of the slope 4 at the rising edge of the pulse 3 is set to 15 V / μs or more.

By making the rising slope portion 4 steep, the occurrence of a discharge in the middle of the rising of the pulse 3 is suppressed, and the discharge occurs at a high applied voltage. As a result, a large amount of negative charges are accumulated on the surface of the protective film 42 near the sustain-side electrode 32. Therefore, when the sustain pulse Psus is applied in the subsequent subfield, a discharge occurs, and the sustain discharge can be sustained.

(Embodiment 4) Embodiment 4 of the present invention will be described below with reference to FIG. 1, FIG. 4, FIG. 6, and FIG.

FIG. 7 is a schematic diagram of a cell structure of a general conventional AC discharge type plasma display, and FIG. 6 is a diagram showing driving waveforms of a general conventional plasma display. It is the same as that described above.

In FIG. 6, when the period shifts from the sustain period to the write period, since the positive charge remains accumulated on the surface of the protective film 42 near the sustain electrode 32, the voltage V1 is applied to the sustain electrode 32. And unnecessary discharge 1
1 results. When the voltage V1 is low, the discharge 11 occurs in a state in which the potential difference between the sustain-side electrode 32 and the scan-side electrode 31 is small. Even if the sustain pulse is applied, the sustain discharge is not sufficiently performed, and the discharge is interrupted or weakened, and the lighting display state is significantly deteriorated.

FIG. 4 is a timing chart of driving waveforms during a transition from a sustain period to a writing period, showing a driving method according to the fourth embodiment of the present invention.

The pulse 5 in this waveform is a sustain pulse Psu
s, and the sustain pulse Psus at the end of the sustain period is applied to the sustain electrode 32.

The pulse 5 is applied, and the discharge is performed in a state where the potential of the sustain side electrode 32 is higher than the potential of the scan side electrode 31 before the transition to the writing period. Due to this discharge, negative charges are collected near the sustain electrode 32 having a higher potential than the scan electrode 31 and accumulated on the surface of the protective film 42. Even if the potential of the sustain-side electrode 32 becomes higher than the potential of the scan-side electrode 31 during the writing period due to the negative charge, no discharge occurs and the negative charge remains stored. Therefore, unnecessary discharge does not occur.

Since the pulse 5 is the same pulse as the sustain pulse Psus, the conventional drive circuit can be used as it is, and the increase in circuit scale can be suppressed.

[0069]

According to a first aspect of the present invention, there is provided a method for driving a plasma display, comprising a scan-side electrode and a sustain-side electrode, and applying a scan pulse to the scan-side electrode to perform a write discharge or a write-erase discharge. A driving method of a plasma display having a sustain period in which a sustain pulse is applied to a sustain side electrode and a scan side electrode to perform sustain light emission, wherein the potential of the scan side electrode is at the end of the sustain period or a portion following the sustain period. It is characterized in that the potential of the sustain-side electrode is maintained at a higher potential than that of the first embodiment. Therefore, the sustain discharge in the subsequent subfield can be continued without changing the wall charges accumulated in the sustain period by unnecessary discharges other than the write discharge in the write period.

In the plasma display driving method according to the present invention (claim 2), when lighting is performed in a plurality of continuous subfields within one field period, a subfield in which writing discharge is not performed among a plurality of continuous subfields is performed. At least one is provided, and the potential of the sustain-side electrode is maintained at a higher potential than the potential of the scan-side electrode in the last part of the sustain period or a part subsequent to the sustain period. Therefore, the sustain discharge in the subsequent subfield can be continued without changing the wall charges accumulated in the sustain period by unnecessary discharges other than the write discharge in the write period.

According to the plasma display driving method of the present invention (claim 3), the lighting is maintained over a plurality of sub-fields until the writing / erasing discharge is performed during the writing period, and the last part of the sustaining period or the part following the sustaining period is maintained. , The sustain-side electrode is maintained at a higher potential than the scan-side electrode. Therefore, the wall charges accumulated in the sustain period are not changed by unnecessary discharges other than the write discharge in the write period,
The sustain discharge in the subsequent subfield can be maintained.

According to the plasma display driving method of the present invention (claim 4), the scan which occurs when the potential of the sustain side electrode is maintained at a higher potential than the potential of the scan side electrode in the last part of the sustain period or the portion subsequent to the sustain period. The first voltage difference between the electrode and the sustain electrode is larger than the potential difference between the scan electrode and the sustain electrode when the scan pulse is not applied during the writing period. Therefore, the sustain discharge in the subsequent subfield can be continued without changing the wall charges accumulated in the sustain period by unnecessary discharges other than the write discharge in the write period.

In the plasma display driving method according to the present invention (claim 5), the time during which the first voltage difference is generated is at least half the period of the sustain pulse.
Therefore, the charge generated by the discharge by applying the first voltage is accumulated on the surface of the protective film near the sustain-side electrode, and the sustain discharge in the subsequent subfield can be continued.

According to the plasma display driving method of the present invention (claim 6), when the first voltage difference is generated between the scan side electrode and the sustain side electrode, the amount of change in the potential difference between the sustain side electrode and the scan side electrode is It is 15 V / μs or more. Therefore, it is possible to prevent a discharge from occurring in a state where the potential difference between the scan-side electrode and the sustain-side electrode at the rising of the first voltage is low, and to sustain the sustain discharge in the subsequent subfield.

The driving method of the plasma display according to the present invention (claim 7) is characterized in that a sustain pulse is applied to the sustain-side electrode, and then the writing period is started. Therefore, the sustain discharge in the subsequent subfield can be sustained without changing the wall charges accumulated in the sustain period by unnecessary discharges other than the write discharge in the write period, and a circuit for using the sustain pulse can be provided. An increase in scale can be suppressed.

A plasma display driving apparatus according to the present invention (claim 8) uses at least one of the plasma display driving methods described in claims 1 to 7. Therefore, the sustain discharge in the subsequent subfield can be continued without changing the wall charges accumulated in the sustain period by unnecessary discharges other than the write discharge in the write period.

[Brief description of the drawings]

FIG. 1 is a time chart of driving waveforms during a transition from a sustain period to a writing period, showing the driving method according to the first embodiment of the present invention;

FIG. 2 is a time chart of driving waveforms during a transition from a sustain period to a writing period, showing the driving method according to the second embodiment of the present invention;

FIG. 3 is a time chart of driving waveforms during a transition from a sustain period to a writing period, showing the driving method according to the third embodiment of the present invention;

FIG. 4 is a time chart of a driving waveform during a transition from a sustain period to a writing period, showing the driving method according to the fourth embodiment of the present invention;

FIG. 5 is a diagram for explaining a driving method according to the first embodiment of the present invention;

FIG. 6 is a diagram for explaining a conventional driving method when a general initialization period and an erasing period are eliminated.

FIG. 7 is a schematic diagram of a cell structure of a general conventional AC discharge type plasma display.

FIG. 8 is a diagram showing a driving waveform of a general conventional AC discharge type plasma display.

FIG. 9 is a diagram showing a conventional driving waveform when a general initialization period and an erasing period are eliminated.

[Explanation of symbols]

1 pulse for increasing the applied voltage of the sustain-side electrode group Pscn scanning pulse Psus sustain pulse V1 Voltage applied to the sustain-side electrode during the writing period

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5C058 AA11 BA01 BA07 BA28 BB03 5C080 AA05 BB05 DD09 HH04 HH05 JJ04 JJ06

Claims (8)

[Claims] 1. A writing period in which a plurality of first column electrodes and a plurality of second column electrodes are provided, and a scanning pulse is applied to the second column electrodes to perform a writing discharge or a writing / erasing discharge. A method of driving a plasma display having a sustaining period in which a sustaining pulse is applied to the first column electrode and the second column electrode to perform sustaining light emission, wherein the sustaining period is a last part of the sustaining period or a part following the sustaining period. The second
A method of driving the plasma display, wherein the potential of the first column electrode is maintained at a higher potential than the potential of the column electrode, and then the writing period is started. 2. The method according to claim 1, wherein lighting is performed in a plurality of continuous subfields within one field period, and one or more subfields in which the write discharge is not performed are provided in the plurality of continuous subfields. 2. The method for driving a plasma display according to 1. 3. The plasma display driving method according to claim 1, wherein the lighting is maintained over a plurality of sub-fields until the writing / erasing discharge is performed during the writing period. 4. The first column generated when the potential of the first column electrode is maintained at a higher potential than the potential of the second column electrode at the end of the sustain period or a portion subsequent to the sustain period. A first voltage difference between an electrode and the second column electrode is larger than a potential difference between the first electrode and the second electrode when the scan pulse is not applied during the writing period. The plasma display driving method according to any one of claims 1 to 3. 5. The plasma display driving method according to claim 1, wherein a time during which the first voltage difference is generated is equal to or longer than a half of a period of the sustain pulse. . 6. When the first voltage difference is generated between the first column electrode and the second column electrode, the first column electrode and the first column electrode are connected until the first voltage difference is reached. 4. The method according to claim 1, wherein the amount of change in the potential difference between the second column electrodes is 15 V / μs or more. 7. The plasma display driving method according to claim 1, wherein after the sustain pulse is applied to the first column electrode, the operation shifts to the writing period. 8. A plasma display driving apparatus using the plasma display driving method according to any one of claims 1 to 7.