JP2003098994A - Plasma display panel driving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plasma display panel driving method which can reduce a flickering to improve the picture quality. SOLUTION: When sub-fields SF7 and SF8 are selected, the length of an off-duty period R provided in the leading sub-field SF7 is set to a value longer than that for non-simultaneous selection of the two sub-fields SF7 and SF8. Concretely, the length of the off-duty period R of the leading sub-field SF7 is set to a value proportional to the number of support cycles in a support period S of the leading sub-field SF7. For example, when the number of support cycles of a sub-field SFn (n is a natural number equal to or larger than 9) is 2<n-1> , the length of the off-duty period R of the sub-field SF7 at the time of selection of sub-fields SF7 and SF8 is (2<7-1> /2<1-1> ) times, namely, 64 times as long as the length of the off-duty period R of a sub-field SF1 at the time of selection of sub-fields SF1 and SF2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of driving a plasma display panel by a subfield method, and more particularly to a method of driving a plasma display panel which can realize high display quality without flicker.

[0002]

2. Description of the Related Art As a driving method of a plasma display panel, there is a subfield method for expressing gradation. In this subfield method, one field is divided into a plurality of subfields (S
F), and it is possible to express an intermediate gradation by combining these subfields.

A driving method employing such a subfield method is disclosed in, for example, Japanese Patent Application Laid-Open Nos. 10-207419 and 11-242459. Japanese Unexamined Patent Publication No. 10-207419 discloses a sub-field immediately after the end of the sustain period in an arbitrary sub-field for the purpose of reducing the charge generated in the discharge space by the sustain discharge and generating sufficient wall charge. It is described that an idle period is provided between the entire writing and erasing discharge periods of the field, and a potential difference is provided between the scan electrode and the sustain electrode during this idle period. Further, in Japanese Patent Application Laid-Open No. 11-242459, each sub sub-unit is expanded for the purpose of expanding the operation margin by stably performing the sustaining and erasing even when the pre-discharge period is thinned to improve the contrast. Adjusting the shape of the sustain erase pulse in the field is described.

[0004]

However, no matter which of these driving methods is adopted, if continuous subfields are selected when displaying gray levels, the subfields in the rear of the selected continuous subfields are selected. There is a problem that writing discharge is less likely to occur in the field. When such a writing discharge is less likely to occur, the transition to the sustaining discharge is stopped after that, so that the displayed image may flicker and the display quality may be significantly deteriorated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a driving method of a plasma display panel capable of reducing flicker and improving image quality.

[0006]

According to a first plasma display panel driving method of the present invention, one field is formed from a plurality of subfields having different weightings, and one of the plurality of subfields is formed. In the method for driving a plasma display panel, wherein one or more subfields are selected based on display data from the above, when two temporally consecutive subfields are selected for emission of one display cell, Of the two subfields, the length of the period from the end of the sustain period of the temporally earlier subfield to the start of the write period of the later subfield is defined as the number of sustain cycles in the sustain period. It is characterized by setting so as to be proportional.

In a second plasma display panel driving method according to the present invention, one field is composed of a plurality of subfields having different weightings, and based on display data from the plurality of subfields. In a driving method of a plasma display panel for selecting one or more subfields, when two temporally consecutive subfields are selected for light emission of one display cell, the two subfields of the two subfields are selected. The length of the period from the end of the sustain period of the temporally earlier subfield to the start of the write period of the later subfield is defined as the number of sustain cycles in the sustain period and the earlier subfield. The setting is to be proportional to the product of the total number of display cells in the entire plasma display panel selected in. To.

In a third plasma display panel driving method according to the present invention, one field is composed of a plurality of subfields having different weightings, and based on display data among the plurality of subfields. In the driving method of the plasma display panel for selecting one or more subfields, the length of the period from the end of the sustain period of any subfield to the start of the writing period of the subfield immediately after that. Is set to be proportional to the number of sustain cycles in the sustain period.

In a fourth plasma display panel driving method according to the present invention, one field is composed of a plurality of subfields having different weightings, and based on display data from the plurality of subfields. In the driving method of the plasma display panel for selecting one or more subfields, the length of the period from the end of the sustain period of any subfield to the start of the writing period of the subfield immediately after that. Is set to be proportional to the product of the number of sustain cycles in the sustain period and the total number of display cells in the entire plasma display panel selected in the arbitrary subfield.

A fifth method for driving a plasma display panel according to the present invention comprises one field from a plurality of subfields having different weightings, and based on display data from the plurality of subfields. In a driving method of a plasma display panel for selecting one or more subfields, the plurality of subfields are configured such that upper subfields and lower subfields alternate with each other. .

In a sixth plasma display panel driving method according to the present invention, one field is constructed from a plurality of subfields having different weightings, and based on display data from the plurality of subfields. In the driving method of the plasma display panel for selecting one or more subfields, the lowest subfield is placed between the highest subfield and the next highest subfield among the plurality of subfields. It is characterized in that the lowermost subfield next to the lowermost subfield is set between the uppermost subfield next to the uppermost subfield and the next higher upper subfield.

According to a seventh plasma display panel driving method of the present invention, one field is constructed from a plurality of subfields having different weightings, and one of the plurality of subfields is selected based on display data. In the driving method of the plasma display panel, which selects one or more subfields, when selecting two subfields having continuous weighting for light emission of one display cell, the two subfields among the two subfields are selected. It is characterized in that the lowest subfield of the plurality of subfields is set between a subfield which is earlier in time and a subfield which is later in time.

In this case, when two sets of two consecutively weighted subfields are selected for the emission of light from one display cell, in the group of the two subfields having the larger weighting, two sets are weighted. And setting the lowest subfield between a subfield that is earlier in time and a subfield that is later in the number of subfields.
In the set with the larger weighting among the subfields of the set, between the subfield that is earlier in time and the subfield that is later in time among the two subfields, the next subfield next to the lowest subfield is placed next. The driving method of the plasma display panel according to claim 7, wherein a subfield is set.

When two temporally consecutive subfields are selected for the light emission of one display cell, the sustain period of the temporally earlier subfield among the two subfields is selected. Set the length of the period from the end to the start of the writing period of the subsequent subfield to 100 μ
It is preferable that the time is at least seconds.

The inventors of the present invention have conducted extensive studies to solve the above problems, and as a result, even when continuous subfields are selected, the number of sustain cycles of the front subfields is reduced or the number of front subfields is reduced. It has been found that the writing discharge can be performed in the rear subfield by setting the subfield idle period to be long. FIG. 1A is a graph showing the relationship between the number of sustain cycles in the front subfield and the write voltage, and FIG. 1B is a graph showing the relationship between the idle period length of the front subfield and the write voltage. Is. As shown in FIG. 1A, when the number of sustain cycles in the front subfield (SF) of the selected continuous subfield is small, the influence of the sustain discharge in the front subfield is small, and the positive discharge on the data electrode side is small. Since wall charges are less likely to be accumulated, the write voltage is lowered and writing becomes possible. In addition, as shown in FIG. 1B, when the pause period of the front subfield of the selected continuous subfield is long, the positive wall charges accumulated on the data electrode side are diffused and disappear. The writing voltage drops and writing becomes possible. The present invention has been made based on such knowledge.

When two temporally consecutive subfields are selected for the light emission of one display cell, the sustain period of the subfield that is temporally ahead of the two subfields ends. It is preferable to set the length of the period (pause period) from the start of the writing period of the subsequent subfield to 100 μsec or more since the amount of positive wall charges accumulated in the sustain period is significantly reduced.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a method of driving a plasma display panel according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. FIG. 2 is a schematic diagram showing a driving method of the plasma display panel according to the first embodiment of the present invention. 2A shows the structure of one field in the conventional driving method, and FIG.
The structure of the field in which the subfields SF7 and SF8 are selected in the first embodiment is shown.

In the first embodiment and the conventional driving method, one field is composed of, for example, nine subfields SF1 to SF9. Each subfield is composed of, for example, a write period W, a sustain period S, and a rest period R. The length of the sustain period S of each subfield is set longer in the upper subfield, and the number of sustain light emission increases in the upper subfield. Weighting is performed in this way. Further, the rest period R is composed of, for example, four periods of a sustain erasing period, a priming period, a priming erasing period, and a blank period. The blank period is the maintenance erase period,
It may be provided before or after any of the priming period and the priming erasing period, and may be distributed and arranged during each period.

Further, in the conventional driving method, FIG.
As shown in (a), the length of the rest period R is common and invariable in each subfield.

On the other hand, in the present embodiment, when there is no selection of consecutive subfields in one field, for example, when only odd-numbered subfields or only even-numbered subfields are selected, FIG. As shown in a), as in the conventional driving method, the idle period R of each subfield has the same length and is invariable.

On the other hand, when continuous subfields within one field are selected, for example, when subfields SF7 and SF8 are selected, the continuous subfields are detected and shown in FIG. As shown, the length of the rest period R provided in the front subfield SF7 set earlier in time among the consecutive subfields SF7 and SF8, that is, the last sustain pulse of the front subfield SF7. These two subfields SF7 and SF8 are not selected at the same time as the length of the period until the writing period W provided in the rear subfield SF8 which is set later in time from the application is started. Set longer than the case. Specifically, the length of the rest period R of the front subfield SF7 is
The length is set to be proportional to the number of sustain cycles in the sustain period S of the front subfield. For example, the number of sustain cycles of the subfield SFn (n is a natural number of 9 or less) is 2
subfields SF7 and SF if ^{n- 1.}
The length of the rest period R of the subfield SF7 when 8 is selected is (2 ^7-1 / 2 ^1- of the length of the rest period R of the subfield SF1 when the subfields SF1 and SF2 are selected. ¹ ) times, that is, 64 times.

However, since the length of one field does not change, the rest period R of other subfields is shortened by the length of the rest period R set. Such adjustment of the length of the rest period R can be performed, for example, by adjusting the length of the blank period provided therein.

Next, the effect of the first embodiment will be described in comparison with the conventional driving method. FIG. 3A is a timing chart showing a conventional driving method, and FIG.
3 is a timing chart showing a driving method according to the example of the above. 4A to 4E are schematic diagrams showing the distribution of wall charges at time points A to E in FIG. 3, respectively. 3 and 4 show the display cells in which the subfields SF7 and SF8 are selected in one field.

As shown in FIG. 4A, at the end point A of the sustain period S of the front subfield SF7, the sustain discharge between the scan electrode 12 and the sustain electrode 13 is generated as compared with the unselected display cells. A large amount of positive wall charges are accumulated on the data electrode 11 side.

In the conventional driving method, the length of the rest period R of the front subfield SF7 is constant regardless of the selection of consecutive subfields SF7 and SF8 in a certain display cell. Therefore, a large amount of positive wall charges accumulated on the data electrode 11 remain,
As shown in FIG. 4B, a weak counter discharge between the scan base pulse Sb and the data pulse (not shown) in the period in which the scan pulse Ss is not applied in the writing period W of the rear subfield SF8. Occurs. The scan base pulse Sb is applied to prevent the problem of IC breakdown voltage and to prevent self-erasure from occurring due to the scan pulse Ss. When such an erroneous discharge occurs, positive wall charges are accumulated on the scan electrode 12 side. Therefore, even if a predetermined scan pulse Ss and a data pulse are applied, the potential difference between the scan electrode 12 and the data electrode 11 is discharged. The start voltage could not be reached, and Fig. 4
As shown in (c), writing discharge for writing may not occur.

On the other hand, in the first embodiment,
As shown in FIG. 3B, consecutive subfields SF
In the display cells in which No. 7 and SF8 are selected, the idle period R of the front subfield SF7 is set to be longer than that in the case where these are not simultaneously selected. ), The positive wall charges accumulated on the data electrode 11 side diffuse and disappear during the sustain period S of the front subfield SF7. Therefore, the erroneous discharge between the scan base pulse Sb and the data pulse, which occurs conventionally, does not occur. As a result, by applying the predetermined scan pulse Ss and the data pulse, the scan electrode 12
The potential difference between the data electrode 11 and the data electrode 11 surely reaches the discharge start voltage, and the write discharge is reliably generated as shown in FIG.

The amount of wall charges accumulated on the data electrode 11 side due to the sustain discharge that causes the above-mentioned erroneous discharge is
Although it increases in proportion to the number of sustain pulses in the front subfield, in the first embodiment, when the continuous subfield is selected, the length of the rest period R is set in proportion to the number of sustain pulses. Therefore, the occurrence of erroneous discharge can be effectively prevented.

If the amplitude of the scan base pulse Sb is reduced or the scan base pulse Sb is removed in order to prevent the above-mentioned erroneous discharge, it is necessary to significantly increase the breakdown voltage of the scan IC. However, a self-erasing discharge is likely to occur at the pulse end portion, which causes a new problem.

Next, a second embodiment of the present invention will be described. FIG. 5 is a schematic diagram showing a driving method of the plasma display panel according to the second embodiment of the present invention. In addition,
FIG. 5A shows the structure of one field in the conventional driving method, and FIG. 5B shows the structure of fields in which the subfields SF7 and SF8 are selected in the second embodiment.

Also in the second embodiment, when there is no selection of consecutive sub-fields in one field, FIG.
As shown in (a), as in the conventional driving method, the rest period R of each subfield has the same length and is unchanged.
When continuous subfields are selected in the field, for example, when subfields SF7 and SF8 are selected, the continuous subfields are detected, and as shown in FIG. The length of the rest period R provided in the sub-fields is set longer than the length when the two subfields SF7 and SF8 are not simultaneously selected. However, the method of setting this length is different from the first embodiment, and in the second embodiment,
The length of the rest period R of the front subfield SF7 is set to a length proportional to the product of the number of sustain cycles in the sustain period S of the front subfield and the total number of display cells selected on the entire panel surface in the front subfield. Set.
For example, subfield SFn (n is a natural number of 9 or less)
When the number of sustain cycles of the subfield SF2 is 2 ^{n− 1} , the subfields SF7 and SF8 are selected, and the idle period R of the subfield SF7 when the total number of display cells selected in the subfield SF7 is 100. The length is
Subfields SF1 and SF2 are selected, and the total number of display cells selected in the subfield SF1 is 1
(2 ^7-1 × ^{100/2 1-1} × 1) times the length of the idle period R of the subfield SF1 when
It becomes 0 times.

The total number of display cells can be easily detected from the display data.

Also in such a second embodiment, the first
The same effect as that of the embodiment can be obtained.

In the first and second embodiments,
In the entire plasma display panel, a plurality of display cells having different continuous subfields, such as a display cell selecting subfields SF3 and SF4 and a display cell selecting subfields SF7 and SF8, are included in one field. It may exist. Even in such a case, the length of the rest period R according to these embodiments can be set for any display cell.

Next, a third embodiment of the present invention will be described. FIG. 6 is a schematic diagram showing a driving method of a plasma display panel according to a third embodiment of the present invention. In addition,
FIG. 6A shows the structure of one field in the conventional driving method, and FIG. 6B shows the structure of one field in the third embodiment.

In the third embodiment, the idle period R of each subfield is irrespective of whether or not a continuous subfield is selected in one field and which subfield is the continuous subfield. Is set to a length proportional to the product of the number of sustain cycles in the sustain period S of the subfield and the total number of display cells selected on the entire panel surface in this subfield. That is, the length of the total rest period R allocated to one field is distributed to each subfield in proportion to the product of the number of sustain cycles of each subfield and the selected total number of display cells. Assign.

Next, a fourth embodiment of the present invention will be described. FIG. 7 is a schematic diagram showing a driving method of a plasma display panel according to a fourth embodiment of the present invention. In addition,
FIG. 7A shows the structure of one field in the conventional driving method, and FIG. 7B shows the structure of one field in the fourth embodiment.

In the fourth embodiment, the idle period R of each subfield is irrespective of whether or not a continuous subfield is selected in one field and which subfield is the continuous subfield. Is set to a length proportional to the number of sustain cycles in the sustain period S of the subfield. That is, the length of the total rest period R assigned to one field is distributed and assigned to each subfield in proportion to the number of sustain cycles of each subfield.

For example, subfield SFn (n is 9 or more)
The number of maintenance cycles (lower natural number) is 2 ^n-1If
Is a list of consecutive subfields
Regardless of which subfield the subfield is
The length of the rest period R of the subfield SF7 is
The length of the rest period R of the field SF1 ((2^7-1/ 2
^1-1) Times, that is, 64 times.

Next, a fifth embodiment of the present invention will be described. FIG. 8 is a schematic diagram showing a driving method of a plasma display panel according to a fifth embodiment of the present invention. In addition,
FIG. 8A shows the structure of one field in the conventional driving method, and FIG. 8B shows the structure of one field in the fifth embodiment.

In the fifth embodiment, the upper subfield and the lower subfield are irrespective of whether or not a continuous subfield is selected in one field and which subfield is the continuous subfield. And are provided alternately. Here, the upper sub-field and the lower sub-field are, respectively, those sub-fields that are higher than the middle and lower when the plurality of sub-fields forming one field are arranged in order from the one having the largest number of sustain pulses. Say. When a plurality of subfields forming one field are odd numbers, they are located exactly in the middle, but the temporal position is not particularly limited, but it is preferable to provide them at the beginning or the end of one field.

For example, as shown in FIG. 8B, when continuous subfields are selected, the number of sustain cycles of the subfield SFn (n is a natural number of 9 or less) is 2
subfields SF5, SF4, SF as ^{n- 1}
6, SF3, SF7, SF2, SF8, SF1 and SF
Nine subfields can be arranged in the order of 9 to form one subfield.

According to the fifth embodiment, there is a lower subfield having a relatively small number of sustain cycles between an upper subfield having a relatively larger number of sustain cycles,
Data electrode 1 in sustain period S of lower subfield
Since the amount of accumulated wall charges on the first side is small, write discharge is likely to occur in the subsequent upper subfield. Further, even if writing is not possible in the lower subfield, the flicker becomes less visible because the subfield that follows is an upper subfield with strong sustaining emission intensity.

Next, a sixth embodiment of the present invention will be described. FIG. 9 is a schematic view showing the driving method of the plasma display panel according to the sixth embodiment of the present invention. In addition,
FIG. 9A shows the structure of one field in the conventional driving method, and FIG. 9B shows the structure of one field in the sixth embodiment.

In the sixth embodiment, immediately before the highest subfield SF9, regardless of whether or not a continuous subfield is selected in one field and which subfield is the continuous subfield. , The lowest subfield SF1 is provided, and immediately before the highest subfield SF8 after the highest subfield SF9, the lowest subfield SF2 is provided next to the lowest subfield SF1.

Next, a seventh embodiment of the present invention will be described. FIG. 10 is a schematic view showing the driving method of the plasma display panel according to the seventh embodiment of the present invention. 10A shows the structure of one field in the conventional driving method, and FIG. 10B shows the structure of the field in which the subfields SF6, SF7 and SF8 are selected in the seventh embodiment. .

In the seventh embodiment, as in the first and second embodiments, when there is no selection of consecutive subfields in one field, as shown in FIG.
As in the conventional driving method, the rest period R of each subfield
Shall have the same length and be invariant.

On the other hand, when subfields having consecutive weighting in one field are selected, for example, when subfields SF6, SF7 and SF8 are selected,
The continuous subfields are detected, and as shown in FIG. 10B, one subfield SF1 and one subfield SF2 are provided between them in order from the lowest. At this time, it is preferable to preferentially provide a lower subfield between subfields having a large weight.

In these embodiments, the rest period R is within the one subfield after the sustain period S. However, the rest period R is changed to the writing period W by changing the view of the partition between the subfields. It can be taken in front of.

[0049]

As described in detail above, according to the present invention,
Since the length of the rest period or the arrangement of the subfields is appropriately adjusted, even if a large amount of wall charge is accumulated on the data electrode side in the sustain period of a certain subfield,
Do you surely perform the write discharge in the next subfield?
Alternatively, the next subfield can be set so as not to affect the image quality even if the writing discharge is not reliably generated.
As a result, good image quality with less flicker can be obtained.

[Brief description of drawings]

FIG. 1A is a graph showing a relationship between the number of sustain cycles in a front subfield and a write voltage, and FIG. 1B is a graph showing a relationship between a pause period in the front subfield and a write voltage. It is a graph figure.

FIG. 2 is a schematic diagram showing a driving method of the plasma display panel according to the first embodiment of the present invention.

FIG. 3A is a timing chart showing a conventional driving method, and FIG. 3B is a timing chart showing a driving method according to the first embodiment.

4A to 4E are schematic diagrams showing wall charge distributions at time points A to E in FIG. 3, respectively.

FIG. 5 is a schematic diagram showing a driving method of a plasma display panel according to a second embodiment of the present invention.

FIG. 6 is a schematic diagram showing a driving method of a plasma display panel according to a third embodiment of the present invention.

FIG. 7 is a schematic diagram showing a driving method of a plasma display panel according to a fourth embodiment of the present invention.

FIG. 8 is a schematic diagram showing a driving method of a plasma display panel according to a fifth embodiment of the present invention.

FIG. 9 is a schematic diagram showing a driving method of a plasma display panel according to a sixth embodiment of the present invention.

FIG. 10 is a schematic diagram showing a driving method of a plasma display panel according to a seventh embodiment of the present invention.

[Explanation of symbols]

11; data electrode 12; scanning electrode 13; sustain electrode

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Manabu Ide             5-7 Shiba 5-1, Minato-ku, Tokyo NEC Corporation             Inside the company F-term (reference) 5C080 AA05 BB05 DD06 FF12 HH05                       JJ04 JJ06

Claims (9)

[Claims] 1. A plasma display panel in which one field is constructed from a plurality of subfields having different weightings, and one or more subfields are selected from the plurality of subfields based on display data. In the driving method of, when selecting two temporally consecutive subfields for light emission of one display cell,
The number of sustain cycles in the sustain period is defined as the length of the period from the end of the sustain period of the subfield that is earlier in time among the two subfields to the start of the write period of the subsequent subfield. A method for driving a plasma display panel, wherein the driving method is set so as to be proportional to. 2. A plasma display panel in which one field is composed of a plurality of subfields having different weightings, and one or more subfields are selected from the plurality of subfields based on display data. In the driving method of, when selecting two temporally consecutive subfields for light emission of one display cell,
The number of sustain cycles in the sustain period is defined as the length of the period from the end of the sustain period of the subfield that is earlier in time among the two subfields to the start of the write period of the subsequent subfield. And a driving method of the plasma display panel, which is set so as to be proportional to a product of the total number of display cells in the entire plasma display panel selected in the subfield. 3. A plasma display panel in which one field is composed of a plurality of subfields having different weightings, and one or more subfields are selected from the plurality of subfields based on display data. In the driving method described above, the length of the period from the end of the sustain period of any subfield to the start of the write period of the subfield immediately after that is set to be proportional to the number of sustain cycles in the sustain period. A method of driving a plasma display panel, characterized by setting. 4. A plasma display panel in which one field is constructed from a plurality of subfields having different weightings, and one or more subfields are selected from the plurality of subfields based on display data. In the above driving method, the length of the period from the end of the sustain period of any subfield to the start of the write period of the subfield immediately after that is defined as the number of sustain cycles in the sustain period and the arbitrary subfield. A driving method of a plasma display panel, which is set in proportion to a product of the total number of display cells in the entire plasma display panel selected in the field. 5. A plasma display panel in which one field is formed from a plurality of subfields having different weightings, and one or more subfields are selected from the plurality of subfields based on display data. 2. The driving method for a plasma display panel according to claim 1, wherein the plurality of subfields are formed by alternating upper subfields and lower subfields. 6. A plasma display panel in which one field is constructed from a plurality of subfields having different weightings, and one or more subfields are selected from the plurality of subfields based on display data. In the driving method, the lowest subfield is set between the highest subfield and the next highest subfield of the plurality of subfields, and the highest next subfield is set next to the highest subfield. A method of driving a plasma display panel, wherein a subfield next to the lowest subfield is set between the subfield and the next higher subfield. 7. A plasma display panel in which one field is composed of a plurality of subfields having different weightings, and one or more subfields are selected from the plurality of subfields based on display data. In the driving method described above, when selecting two subfields having continuous weighting for light emission of one display cell, the subfield that is earlier in time and the subfield that is later in time among the two subfields are selected. And a lowermost subfield of the plurality of subfields is set between the first and second subfields. 8. When selecting two sets of two consecutively weighted subfields for emission of one display cell, two of the two subfields having the largest weighting are selected. Of the two subfields, the lowest subfield is set between a subfield that is earlier in time and a subfield that is later in the subfield of
8. The subfield next to the lowest subfield is set between a subfield which is earlier in time and a subfield which is later in the two subfields. Driving method for plasma display panel of. 9. When selecting two temporally consecutive subfields for emission of one display cell, a sustain period of a temporally earlier subfield of the two subfields is selected. 9. The length of a period from the end to the start of a writing period of a subfield that follows is 100 μsec or more, and the period is 100 μsec or more.
6. A method for driving a plasma display panel according to item.