JP2000322026A - Plasma display drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure writing when the writing period is shortened by setting the electric charge quantities formed between data electrodes and scanning electrodes during the writing period to different values of the same polarity between luminescent cells and nonluminescent cells. SOLUTION: Pulses 100, 101, 103 are applied to data electrodes during the period when pulses 110, 111, 113 are applied to scanning electrodes of non- writing cells. These pulses 100, 101, 103 are shorter in width than the pulses applied to the data electrodes at the time of writing. Pulses 102 with a long pulse width are applied to writing cells for writing in the period when pulses 112 are applied to the scanning electrodes as before. Since the said voltage is applied to nonluminescent cells during the writing period, the electric charge quantities formed between the data electrodes and scanning electrodes are set to different values of the same polarity between luminescent cells and nonluminescent cells.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cell which is generated when a writing failure occurs when a writing period for writing information in a cell to be lit and a light emitting period for causing the cell in which information is written to be driven separately. The present invention relates to a plasma display driving device capable of suppressing poor lighting and improving image quality.

[0002]

2. Description of the Related Art As a conventional method of driving a three-electrode surface discharge type plasma display panel, a writing period in which information is written in a cell to be lit and a light emitting period in which a cell in which the information is written are lit are driven separately. So-called "address / sustain discharge separation type" is known,
This is disclosed in JP-A-7-271325.
A method for writing data to the plasma display in the writing period of this method will be described below with reference to FIGS.

In FIG. 8, reference numeral 1 denotes a plasma display panel, 2 denotes a cell which is a minimum light-emitting unit, of which cells indicated by oblique lines emit light, and 3 denotes a data electrode arranged in a vertical direction. -1, Xm, Xm +
Scan electrodes arranged in the horizontal direction are arranged in the order of 1, and Y0, Y1,..., Yn-1, Y
n, Yn + 1, and Yn + 2. Scan electrode Y
A cell existing at the intersection of n and the data electrode Xm emits light,
The other cells do not emit light.

FIG. 9 shows a voltage waveform applied to each electrode of the plasma display panel shown in FIG. Scan electrode Y
Writing is performed in order from 0 in the following manner.

First, a scan pulse is applied to the scan electrode Y0, and a pulse having a polarity opposite to that of the pulse applied to the scan electrode is applied to the data electrodes corresponding to the cells to be made to emit light among all the data electrodes. , A write discharge is performed. Hereinafter, the same operation is performed sequentially from Y1.
Data is written in all display lines. In addition, no pulse is applied to the scanning electrode and the data electrode of the cell that does not emit light at the same time.

[0006]

However, in a plasma display in which the writing period and the light emission period are driven separately, the probability of writing failure increases as the time allocated to writing per line is shortened. As a result, the number of lighting failures resulting therefrom increases, so that the image quality deteriorates.

The present invention provides a technique for reliably performing writing when the writing time is shortened.

[0008]

In order to solve the above-mentioned problems, a plasma display driving apparatus according to the present invention comprises a sustain electrode, a scan electrode arranged in parallel with the sustain electrode, and a scan electrode arranged in a direction orthogonal to the scan electrode. Data electrode,
One field period is divided into a plurality of subfield periods having a predetermined luminance weight, a gradation is expressed by a combination of ON or OFF of light emission for each of the subfields, and a writing period for writing information in a cell to emit light and a writing period. An apparatus for driving a cell in which the information is written during a writing period separately from a light emitting period in which light is emitted, wherein an amount of charge formed between the data electrode and the scanning electrode during the writing period is reduced. It is characterized in that cells having light emission and cells not emitting light have the same polarity and different values.

A plasma display driving apparatus according to the present invention has a sustain electrode, a scan electrode arranged in parallel with the sustain electrode, and a data electrode arranged in a direction perpendicular to the scan electrode, and has a predetermined one-field period. Divided into a plurality of subfield periods having a luminance weight, expresses a gray scale by a combination of ON or OFF of light emission for each of the subfields, and writes a write period for writing information in a cell to emit light and the write period. An apparatus in which a cell in which information is written is driven separately from a light emitting period in which light is emitted, and a binary voltage waveform applied to the data electrode during a writing period of a predetermined pixel is pulsed with respect to the cell in which light is emitted. It is characterized in that the pulse width is made shorter for cells that are long and do not emit light.

A plasma display driving device according to the present invention includes a sustain electrode, a scan electrode arranged in parallel with the sustain electrode, and a data electrode arranged in a direction orthogonal to the scan electrode, and has a one-field period. It is divided into a plurality of sub-field periods having a predetermined luminance weight, expresses a gradation by a combination of ON or OFF of light emission for each of the sub-fields, and a writing period for writing information in a cell to emit light and a writing period. A device for driving the cell in which the information is written separately from a light emitting period in which light is emitted, wherein a binary voltage waveform applied to the data electrode during a writing period of a predetermined pixel is set to a value corresponding to a cell not emitting light. Is characterized by a low voltage and a high voltage for cells that emit light.

A plasma display driving apparatus according to the present invention has a sustain electrode, a scan electrode arranged in parallel with the sustain electrode, and a data electrode arranged in a direction orthogonal to the scan electrode, and has one field period. It is divided into a plurality of sub-field periods having a predetermined luminance weight, expresses a gradation by a combination of ON or OFF of light emission for each of the sub-fields, and a writing period for writing information in a cell to emit light and a writing period. An apparatus in which the cell in which the information is written is driven separately from a light emitting period in which light is emitted, and an average value of a voltage waveform applied to the data electrode during a writing period of a predetermined pixel is compared with a cell in which light is not emitted. It is characterized in that it is set higher for cells that emit light at a lower level.

In addition, the formation of electric charge between the data electrode and the scanning electrode during the writing period in the cell which does not emit light is performed only in one or more subfield periods having a luminance weighting of a predetermined value. It is characterized by.

[0013] Further, the charge formation between the data electrode and the scan electrode in the cell not emitting light during the writing period is performed only when the number of cells lit in one field period exceeds a preset threshold value. It is characterized by performing.

[0014] Further, the invention is characterized in that electric charge is formed between the data electrode and the scan electrode during the writing period in a cell which does not emit light only when the cell exists near a cell which emits light.

Further, voltage application to the data electrode of a cell which does not emit light during a writing period of a predetermined pixel is performed only in one or more subfield periods having a luminance weighting of a predetermined value. I do.

Further, voltage application to the data electrode of a cell which does not emit light during a writing period of a predetermined pixel is performed only when the number of cells to be lit within one field period exceeds a predetermined threshold value. Features.

Further, a voltage is applied to the data electrode of a cell which does not emit light during a writing period of a predetermined pixel only when the cell exists near a cell which emits light.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A plasma display driving apparatus according to the present invention comprises a sustain electrode, a scan electrode arranged in parallel with the sustain electrode, and a data electrode arranged in a direction perpendicular to the scan electrode. Writing, in which one field period is divided into a plurality of subfield periods having a predetermined luminance weight, gradation is expressed by a combination of ON or OFF of light emission for each of the subfields, and information is written in a cell to emit light. A device for driving the cell in which the information is written during the writing period separately from a light emitting period during which the information is written, wherein the device is formed between the data electrode and the scanning electrode during the writing period. The cell is characterized by having the same polarity and different values between cells that emit light and cells that do not emit light. It occurs no write discharge, preliminary discharge of about does not reach occurs before the write information in not emit light cell.

The priming particles generated by the preliminary discharge flow into the cell where writing is performed, so that the space in the cell is in a state where discharge is likely to occur and the writing discharge is assisted. It becomes possible. As a result, it is possible to suppress a lighting failure during a light emission period that occurs due to a writing failure and improve image quality.

According to a second aspect of the present invention, there is provided a plasma display driving apparatus comprising: a sustain electrode; a scan electrode arranged in parallel with the sustain electrode; and a data electrode arranged in a direction perpendicular to the scan electrode. A field period is divided into a plurality of subfield periods having a predetermined luminance weight, a gradation is expressed by a combination of ON or OFF of light emission for each of the subfields, and a write period and a write period for writing information in a cell to emit light. An apparatus for separately driving a light emitting period in which a cell in which the information is written in a period emits light, wherein a binary voltage waveform applied to the data electrode during a writing period of a predetermined pixel includes a cell to emit light. The pulse width is shortened for cells that do not emit light with a long pulse width. It occurs write discharge for writing the information, the preliminary discharge of about does not reach occurs before the write information in not emit light cell.

Since the priming particles generated by the preliminary discharge flow into the cell to be written, the space in the cell is easily discharged and the writing discharge is assisted. It becomes possible. As a result, it is possible to suppress a lighting failure during a light emission period that occurs due to a writing failure and improve image quality.

According to a third aspect of the present invention, there is provided a plasma display driving apparatus comprising: a sustain electrode; a scan electrode arranged in parallel with the sustain electrode; and a data electrode arranged in a direction perpendicular to the scan electrode. A field period is divided into a plurality of subfield periods having a predetermined luminance weight, a gradation is expressed by a combination of ON or OFF of light emission for each of the subfields, and a write period and a write period for writing information in a cell to emit light. A device for separately driving a light emitting period in which a cell in which the information is written in a period emits light, wherein a binary voltage waveform applied to the data electrode during a writing period of a predetermined pixel includes a cell in which no light is emitted. Is characterized by a low voltage, and a high voltage is applied to a cell that emits light. Write discharge occurs, the preliminary discharge of about does not reach occurs before the write information in not emit light cell.

The priming particles generated by the preliminary discharge flow into the cell where writing is performed, so that the space in the cell is in a state where discharge is likely to occur and the writing discharge is assisted. It becomes possible. As a result, it is possible to suppress a lighting failure during a light emission period that occurs due to a writing failure and improve image quality.

A plasma display driving apparatus according to the present invention has a sustain electrode, a scan electrode arranged in parallel with the sustain electrode, and a data electrode arranged in a direction perpendicular to the scan electrode. A writing period in which one field period is divided into a plurality of subfield periods having a predetermined luminance weight, a gradation is expressed by a combination of ON or OFF of light emission for each of the subfields, and information is written in a cell to emit light; An apparatus that separately drives a light emitting period in which a cell in which the information is written during the writing period and emits light, wherein an average value of a voltage waveform applied to the data electrode during a writing period of a predetermined pixel is: It is characterized by the fact that it is set low for cells that do not emit light and high for cells that emit light, until information is written in the cells that do not emit light. Although occurs preliminary discharge of about does not result, it is possible to suppress the minute light emission when the preliminary discharge is generated, does not deteriorate the contrast.

In addition, the priming particles generated by the preliminary discharge flow into the cell to be written, so that the space in the cell is in a state where discharge is likely to occur and the writing discharge is assisted to assist the writing discharge. It becomes possible. As a result, it is possible to suppress a lighting failure during a light emission period that occurs due to a writing failure and improve image quality.

In the plasma display driving device according to the present invention, the charge formation between the data electrode and the scan electrode during the writing period in the cell which does not emit light has a luminance weight of a preset value. It is performed only in one or more sub-field periods.

For this reason, the number of times of the preliminary discharge can be reduced as compared with the case where the preliminary discharge is performed in all the subfields, and the influence of minute light emission accompanying the preliminary discharge on the contrast can be suppressed. Also, by reducing the number of times of the preliminary discharge, the number of times of charging and discharging between the data electrode and the scanning electrode serving as a capacitive load is reduced, so that an increase in power consumption can be suppressed.

In the plasma display driving device according to the present invention (claim 8), the charge formation between the data electrode and the scanning electrode during the writing period in the cell which does not emit light is performed by the number of cells lit in one field period. Is performed only when the value exceeds a preset threshold.

For this reason, if there are many cells having a luminance level of 0 within one field period and a high contrast is required, the preliminary discharge is not performed, so that the influence of the minute light emission accompanying the preliminary discharge on the contrast is suppressed. can do. In addition, since the number of times of preliminary discharge is reduced in any image compared to the case of performing preliminary discharge, the number of times of charge / discharge between the data electrode and the scan electrode serving as a capacitive load is reduced, so that power consumption is increased. Can be held down.

In the plasma display driving apparatus according to the present invention (claim 9), the charge formation between the data electrode and the scan electrode during the writing period in the cell which does not emit light exists in the vicinity of the cell where the cell emits light. It is characterized in that it is performed only when

For this reason, since the preliminary discharge is not performed except in the vicinity of the cell to be lit, the influence of the minute light emission accompanying the preliminary discharge on the contrast can be suppressed, and the preliminary discharge is performed in the vicinity of the cell to be lit. Therefore, writing can be reliably performed, and lighting failure can be suppressed. In addition, since the number of cells performing the preliminary discharge is reduced as compared with the case where the preliminary discharge is performed in all the cells in the screen, the charge / discharge current between the data electrode and the scan electrode serving as a capacitive load is reduced. An increase in power consumption can be suppressed.

In the plasma display driving apparatus according to the present invention (claim 10), the voltage application to the data electrode of the cell which does not emit light during the writing period of the predetermined pixel has one of the brightness weighting of a predetermined value. The operation is performed only in the above-described subfield period.

Therefore, the number of times of the preliminary discharge can be reduced as compared with the case where the preliminary discharge is performed in all the subfields, and the influence of the minute light emission accompanying the preliminary discharge on the contrast can be suppressed. it can. Also, by reducing the number of times of the preliminary discharge, the number of times of charging and discharging between the data electrode and the scanning electrode serving as a capacitive load is reduced, so that an increase in power consumption can be suppressed.

In the plasma display driving apparatus according to the present invention (claim 11), the voltage application to the data electrode of the cell which does not emit light during the writing period of the predetermined pixel is performed by setting the number of cells to be lit within one field period in advance. It is characterized in that it is performed only when the set threshold value is exceeded.

For this reason, when there are many cells having a luminance level of 0 within one field period and a high contrast is required, the preliminary discharge is not performed, so that the influence of the minute light emission accompanying the preliminary discharge on the contrast is suppressed. can do. Also, in any image, the number of pre-discharges is reduced as compared with the case where pre-discharge is performed, so that the number of times of charging and discharging between the data electrode and the scanning electrode serving as a capacitive load is reduced, thereby increasing power consumption. Can be held down.

In the plasma display driving apparatus according to the present invention (claim 12), the voltage application to the data electrode of the cell which does not emit light during the writing period of the predetermined pixel is performed in the case where the cell exists near the cell which emits light. Is performed only for

For this reason, since the preliminary discharge is not performed except in the vicinity of the cell to be lit, it is possible to suppress the influence of minute light emission accompanying the preliminary discharge on the contrast, and to perform the preliminary discharge in the vicinity of the cell to be lit. Therefore, writing can be reliably performed, and lighting failure can be suppressed. In addition, since the number of cells performing the preliminary discharge is reduced as compared with the case where the preliminary discharge is performed in all the cells in the screen, the charge / discharge current between the data electrode and the scan electrode serving as a capacitive load is reduced. An increase in power consumption can be suppressed.

(Embodiment 1) The present invention (Claim 1)
The embodiments 3) to 3) will be described below with reference to FIGS.

In FIG. 8, 1 is a plasma display panel,
Numeral 2 denotes a cell which is a minimum light emitting unit, of which cells indicated by diagonal lines emit light, and 3 denotes data electrodes arranged in the vertical direction, arranged in the order of Xm-1, Xm, Xm + 1 from the left end to the right end. Are scanning electrodes arranged in the horizontal direction, and are arranged in the order of Y0, Y1,..., Yn-1, Yn from the upper end to the lower end. This name will be used hereinafter. It is assumed that the cell existing at the intersection of the scanning electrode Yn and the data electrode Xm emits light, and the other cells do not emit light.

FIG. 9 shows a voltage waveform applied to each electrode of the plasma display panel shown in FIG. 8 in the conventional driving method. 910, 911, 912,
A pulse is applied like 913. Further, no voltage is applied to the data electrode during a period in which a pulse is applied to the scan electrode of a cell where writing is not performed (a period in which the pulses 910, 912, and 913 are applied).

FIG. 1 shows a voltage waveform applied to each electrode of the plasma display panel shown in FIG. 8 in the present invention. In the present invention, as shown in FIG. 1, the period (110, 111,
A pulse (100, 101, 103) is applied to the data electrode during the period when the 113 pulse is applied. However, this pulse is a pulse shorter in width than the pulse applied to the data electrode at the time of writing. To the cell where writing is to be performed, writing is performed by applying the pulse 102 having a long pulse width during a period in which a pulse is applied to the scan electrode (a period in which the 112 pulse is applied) as in the related art.

The electrode configuration of the plasma display according to the present invention is exactly the same as the conventional one shown in FIG. 8, but the following effects can be obtained by making the input voltage waveform as described above.

By applying the above-described voltage to the cell not emitting light during the writing period, the amount of charge formed between the data electrode and the scanning electrode is the same between the cell emitting light and the cell not emitting light. Polarity and different values can be used.

As a result, a write discharge in which writing is performed occurs in a cell that emits light, and a preliminary discharge that does not write is generated in a cell that does not emit light. The priming particles generated by this preliminary discharge flow into the cell to be written, so that the space inside the cell is in a state where discharge is likely to occur, and writing is reliably performed in a short writing time to assist the writing discharge. Becomes possible. Therefore, it is possible to suppress a light emission failure during a light emission period that occurs due to a writing failure, and to obtain a high-quality display.

As shown in FIG. 2, a period (21) in which a pulse is applied to the scan electrode of a cell where writing is not performed.
In the case where the pulse applied to the data electrode during the period when the pulse of 0, 211, 213 is applied) is a lower voltage pulse (200, 201, 203) than the pulse applied to the data electrode at the time of writing, the data electrode and the scanning electrode Since the amount of charge formed between the cells can be made to have the same polarity and different values between the cell that emits light and the cell that does not emit light, the same effect as described above can be obtained.

(Embodiment 2) The present invention (Claim 4)
Embodiments 6) will be described below with reference to FIGS. 3, 8, and 9. FIG.

In FIG. 8, it is assumed that the cell existing at the intersection of the scanning electrode Yn and the data electrode Xm emits light and the other cells do not emit light.

FIG. 9 shows a voltage waveform applied to each electrode of the plasma display panel shown in FIG. 8 in the conventional driving method. 910, 911, 912,
A pulse is applied like 913. Further, no voltage is applied to the data electrode during a period in which a pulse is applied to the scan electrode of a cell where writing is not performed (a period in which the pulses 910, 912, and 913 are applied).

FIG. 3 shows a voltage waveform applied to each electrode of the plasma display panel shown in FIG. 8 in the present invention. In the present invention, as shown in FIG. 3, a period (310, 311, 313) during which a pulse is applied to the scan electrode of a cell where writing is not performed.
Is applied to the data electrodes during the period when the pulse is applied. The period during which a pulse is applied to the scan electrode as in the past for the cell to be written
Pulse 3 with a long width (during the period when pulse 312 is applied)
02 is applied to write.

The electrode configuration of the plasma display according to the present invention is exactly the same as the conventional one shown in FIG.

By applying the above-described voltage to the cells that do not emit light during the writing period, the amount of charge formed between the data electrode and the scanning electrode is changed between the cells that emit light and the cells that do not emit light. The same polarity and different values can be used.

As a result, a write discharge for writing is generated in a cell where light is emitted, and a preliminary discharge is generated in a cell where light is not emitted so that writing is not performed. Since the applied voltage is a triangular wave, a discharge is gradually generated, and it is possible to suppress minute light emission due to the preliminary discharge, thereby preventing deterioration in contrast.

Further, the priming particles generated by the preliminary discharge flow into the cell to be written, so that the space in the cell is in a state where discharge is likely to occur and the writing discharge is assisted. Can be written to. Therefore, it is possible to suppress a light emission failure during a light emission period that occurs due to a writing failure, and to obtain a high-quality display.

As shown in FIG. 4, a period (41) in which a pulse is applied to the scan electrode of a cell where writing is not performed.
The pulse applied to the data electrode during the period when the 0,411,413 pulses are applied) is a pulse train composed of short width pulses.
In the case of (400, 401, 402), similarly to the above, the amount of charge formed between the data electrode and the scan electrode may be the same polarity and different in value between the cell that emits light and the cell that does not emit light. it can.

As a result, a write discharge in which writing is performed occurs in a cell where light is emitted, and a preliminary discharge is generated in a cell where light is not emitted so that writing is not performed. Since the voltage is a pulse train, a discharge is gradually generated, and it is possible to suppress minute light emission due to the preliminary discharge, thereby preventing deterioration in contrast.

(Embodiment 3) An embodiment of the present invention (claims 7 and 10) will be described below with reference to FIGS. In the plasma display panel shown in FIG. 8, it is assumed that a cell existing at the intersection of the scanning electrode Yn and the data electrode Xm emits light, and other cells on the data electrode Xm do not emit light. One subfield is composed of eight subfields, and the higher the subfield, the heavier the luminance weight. This cell is assumed to emit light in all subfields.

FIG. 5 shows a waveform of a voltage applied to each electrode of the plasma display panel shown in FIG. 8 in the present invention. Pulses are applied to the respective scanning electrodes in the order of 510, 511, 512, 513 from the upper end.

In the writing period from the sixth subfield to the eighth subfield, a voltage waveform is simultaneously applied to the scan electrodes and the data electrodes of all the cells. However, as shown in FIG. 5, the pulse width of the pulse (500, 501, 503) applied to the data electrode is short for a cell where writing is not performed, and long (502) for a cell where writing is performed. Further, in the writing period from the first subfield to the fifth subfield, a voltage is not simultaneously applied to the data electrode and the scanning electrode of the cell where writing is not performed, and the conventional writing pulse 504 is applied.

The electrode configuration of the plasma display according to the present invention is exactly the same as the conventional one shown in FIG.

By applying a short pulse to the data electrode while the pulse is being applied to the scan electrode, a preliminary discharge is generated to the extent that writing is not performed in the cell. In the period, this discharge does not occur, so that it is possible to reduce minute light emission due to the preliminary discharge, and to suppress the influence on the contrast.

Since the number of times of preliminary discharge is reduced as compared with the case of performing preliminary discharge in all subfields, the number of times of charging / discharging between the data electrode and the scanning electrode serving as a capacitive load is reduced, and power consumption is reduced. The increase can be suppressed. Priming particles generated by the preliminary discharge generated in the upper subfield period flow into the cell to be written, thereby making the space in the cell easy to discharge, and assisting the write discharge. Writing can be performed reliably even in time, and high-quality display without lighting failure can be obtained in the upper subfield having a large visual influence.

(Embodiment 4) An embodiment of the present invention (claims 8 and 11) will be described below with reference to FIGS. In FIG. 8, it is assumed that a cell existing at the intersection of the scanning electrode Yn and the data electrode Xm emits light, and other cells on the data electrode Xm do not emit light.

FIG. 6 shows a voltage waveform applied to each electrode of the plasma display panel shown in FIG. 8 in the present invention, and pulses are applied to each scanning electrode in the order of 610, 611, 612, 613 from the upper end.

Assuming that the number of cells corresponding to 10% of the total number of cells is n, if the number of cells emitting light in one field exceeds n, a voltage waveform is applied to the scan electrodes and data electrodes of all cells simultaneously. You.

However, as shown in FIG. 6, in a cell where writing is not performed, the pulse applied to the data electrode has a short pulse width (600, 601, 603), and in a cell where writing is performed, the pulse width is long (602). When the number of cells that emit light in one field is less than n, no voltage is simultaneously applied to the data electrode and the scan electrode of the cell where writing is not performed as shown in FIG.

The electrode configuration of the plasma display according to the present invention is exactly the same as the conventional one shown in FIG.

By the above operation, in the case of a relatively bright image in which the number of lit cells is 10% or more of the screen,
A preliminary discharge is generated to such an extent that writing is not performed in a cell that does not emit light. In the case of a relatively dark image in which the number of lit cells is less than 10%, the preliminary discharge is not generated.

Therefore, in a dark image requiring a high contrast, it is possible to prevent the deterioration of the contrast due to minute light emission due to the preliminary discharge. In addition, since the number of times of pre-discharge is reduced compared to the case where pre-discharge is performed for any image, the number of times of charging and discharging between the data electrode and the scanning electrode, which is a capacitive load, is reduced, thereby suppressing an increase in power consumption. Can be.

In the case of a relatively bright image in which the number of lit cells is 10% or more of the screen, the priming particles generated by the preliminary discharge flow into the cells to be written, thereby reducing the space in the cells. Since discharge is likely to occur and writing discharge is assisted, writing can be performed reliably even in a short writing time, and high-quality display without lighting failure can be obtained.

(Embodiment 5) Embodiments of the present invention (claims 9 and 12) will be described below with reference to FIGS. In FIG. 8, the cell existing at the intersection of the scanning electrode Yn and the data electrode Xm emits light, and the other cells on the data electrode Xm and all the cells on the data electrode Xm-1 and the data electrode Xm + 1 do not emit light. .

FIG. 7 shows a voltage waveform applied to each electrode of the plasma display shown in FIG. 8 in the present invention. Pulses are applied to the respective scanning electrodes in order from the upper end, such as 710, 711, 712, 713, and a non-light emitting cell near the light emitting cell is simultaneously applied with a short pulse to the data electrode (700 to 705, 707) to emit light. , A pulse (706) having a long width is applied at the same time. Further, no voltage is applied to the scanning electrode and the data electrode at the same time in a cell that does not emit light away from the cell that emits light.

The electrode configuration of the plasma display according to the present invention is exactly the same as the conventional one shown in FIG.

By the above operation, a preliminary discharge is generated in the non-light emitting cell near the light emitting cell to the extent that writing is not performed, and a preliminary discharge is generated in the non-light emitting cell away from the light emitting cell. Do not let. For this reason, the influence of the minute light emission accompanying the preliminary discharge on the contrast can be suppressed only in the vicinity of the cell to emit light.

Further, since the number of cells subjected to the preliminary discharge is reduced as compared with the case where the preliminary discharge is performed in all the cells, the charge / discharge current between the data electrode and the scan electrode serving as a capacitive load is reduced, and the power consumption is reduced. Increase can be suppressed.

Further, the priming particles generated by the preliminary discharge generated in the cell near the light emitting cell flow into the cell to be written, thereby making the space in the cell easily dischargeable, and assisting the write discharge. Therefore, writing can be performed reliably even in a short writing time, and a high-quality display without lighting failure can be obtained.

[0076]

According to the plasma display driving device of the present invention (claims 1 to 3), the amount of electric charge formed between the data electrode and the scanning electrode during the writing period depends on the cell that emits light and the cell that does not emit light. Is characterized by having the same polarity and different values between cells, so that a preliminary discharge that does not reach the point where information is written in a cell that does not emit light occurs, and the priming particles generated thereby assist writing. In addition, writing can be performed reliably, lighting failure in a light emitting period caused by writing failure can be prevented, and image quality can be improved.

In the plasma display driving device according to the present invention (claims 4 to 6), the average value of the voltage waveform applied between the data electrode and the scanning electrode during the writing period is high in a cell that emits light, and does not emit light. Since the cell is characterized by a low discharge, a preliminary discharge that does not reach the point where information is written occurs in the cell that does not emit light, but suppresses the minute light emission generated by this preliminary discharge. And deterioration of the contrast can be prevented. In addition, the priming particles generated by the preliminary discharge assist writing, so that writing can be performed reliably, lighting failure during the light emitting period caused by writing failure can be prevented, and image quality can be improved. it can.

In the plasma display driving device according to the present invention (claims 7 and 10), the charge formation between the data electrode and the scanning electrode during the writing period in the cell that does not emit light has a predetermined value of luminance. 1 with weight
Since the discharge is performed only in one or more subfield periods, the number of times of the preliminary discharge can be reduced, and the influence of minute light emission accompanying the preliminary discharge on the contrast can be suppressed. Also, by reducing the number of times of the preliminary discharge, the number of times of charging and discharging between the data electrode and the scanning electrode serving as a capacitive load is reduced, so that an increase in power consumption can be suppressed.

In the plasma display driving device according to the present invention (claims 8 and 11), the charge formation between the data electrode and the scanning electrode during the writing period in the cell that does not emit light is turned on within one field period. Since the operation is performed only when the number of cells exceeds a preset threshold value, the luminance level becomes 0 within one field period.
When there is a large number of cells and a high contrast is required, the preliminary discharge is not performed, so that the influence of minute light emission accompanying the preliminary discharge on the contrast can be suppressed. Also, by reducing the number of times of the preliminary discharge, the number of times of charging and discharging between the data electrode and the scanning electrode serving as a capacitive load is reduced, so that an increase in power consumption can be suppressed.

In the plasma display driving device according to the present invention (claims 9 and 12), the electric charge formation between the data electrode and the scanning electrode during the writing period in the cell which does not emit light is performed in the cell where the cell emits light. Since the pre-discharge is not performed except in the vicinity of the cell to be lit, the effect of small light emission due to the pre-discharge on the contrast can be suppressed because the pre-discharge is not performed near the cell to be lit. Pre-discharge is performed in the vicinity of the cell to be written, so that writing can be performed reliably and lighting failure can be suppressed. In addition, the reduction in the number of cells to be subjected to the preliminary discharge reduces the charge / discharge current between the data electrode and the scan electrode serving as a capacitive load, thereby suppressing an increase in power consumption.

[Brief description of the drawings]

FIG. 1 is a waveform diagram of a voltage applied to each electrode when a short pulse is applied to a data electrode according to the first embodiment of the present invention;

FIG. 2 is a waveform diagram of a voltage applied to each electrode when a low voltage pulse is applied to a data electrode according to the first embodiment of the present invention;

FIG. 3 is a voltage waveform diagram applied to each electrode when a triangular wave is applied to a data electrode according to the second embodiment of the present invention.

FIG. 4 is a waveform diagram of a voltage applied to each electrode when a pulse train is applied to a data electrode according to the second embodiment of the present invention;

FIG. 5 is a diagram showing voltage waveforms applied to respective electrodes during a writing period according to the third embodiment of the present invention.

FIG. 6 is a voltage waveform diagram applied to each electrode during a writing period according to the fourth embodiment of the present invention.

FIG. 7 is a diagram showing voltage waveforms applied to respective electrodes during a writing period according to the fifth embodiment of the present invention.

FIG. 8 is an arrangement diagram of each electrode of a conventional plasma display panel.

FIG. 9 is a diagram of a voltage waveform applied to each electrode during a conventional writing period.

[Explanation of symbols]

 100 pulses (short width pulse) 101 pulses (short width pulse) 102 pulses (long width pulse) 103 pulses (short width pulse)

Claims (12)

[Claims] A plurality of storage electrodes, each of which includes a sustain electrode, a scan electrode arranged in parallel with the sustain electrode, and a data electrode arranged in a direction orthogonal to the scan electrode, and in which one field period is given a predetermined luminance weight. Are divided into sub-field periods, and gradation is expressed by a combination of ON or OFF of light emission for each sub-field, and a writing period in which information is written in a cell to emit light and a cell in which the information is written in the writing period emit light. A plasma display driving device that is driven separately during a light emitting period, wherein an amount of charge formed between the data electrode and the scanning electrode during the writing period is between a cell that emits light and a cell that does not emit light. A driving device having the same polarity and different values. A plurality of sustain electrodes, scan electrodes arranged in parallel with the sustain electrodes, and data electrodes arranged in a direction orthogonal to the scan electrodes, wherein one field period is given a predetermined luminance weight. Are divided into sub-field periods, and gradation is expressed by a combination of ON or OFF of light emission for each sub-field, and a writing period in which information is written in a cell to emit light and a cell in which the information is written in the writing period emit light. A plasma display driving device that is driven separately from a light emitting period in which a binary voltage waveform applied to the data electrode during a writing period of a predetermined pixel has a long pulse width for a cell to emit light and does not emit light. A plasma display driving device, wherein a pulse width of a cell is reduced. A plurality of sustain electrodes, scan electrodes arranged in parallel with the sustain electrodes, and data electrodes arranged in a direction orthogonal to the scan electrodes, wherein one field period is given a predetermined luminance weight. Are divided into sub-field periods, and gradation is expressed by a combination of ON or OFF of light emission for each sub-field, and a writing period in which information is written in a cell to emit light and a cell in which the information is written in the writing period emit light. A plasma display driving device that is driven separately from a light emitting period to be applied, wherein a binary voltage waveform applied to the data electrode during a writing period of a predetermined pixel is a low voltage for a cell that does not emit light, A plasma display driving device wherein a high voltage is applied to a cell to be driven. 4. A plurality of sustain electrodes, scan electrodes arranged in parallel with the sustain electrodes, and data electrodes arranged in a direction perpendicular to the scan electrodes, wherein one field period is given a predetermined luminance weight. Are divided into sub-field periods, and gradation is expressed by a combination of ON or OFF of light emission for each sub-field, and a writing period in which information is written in a cell to emit light and a cell in which the information is written in the writing period emit light. A plasma display driving device that is driven separately from a light emitting period in which the voltage is applied to the data electrode during a writing period of a predetermined pixel, the average value of the voltage waveform applied to the data electrode is low, and the cell that does not emit light emits light. A plasma display driving device characterized in that the height is set higher for a cell. 5. The plasma display driving device according to claim 4, wherein a voltage waveform applied to the data electrode of a cell that does not emit light during a writing period of a predetermined pixel is a triangular wave. 6. The plasma display driving device according to claim 4, wherein a voltage waveform applied to said data electrode of a cell which does not emit light during a writing period of a predetermined pixel is a pulse train. 7. The formation of electric charge between the data electrode and the scan electrode during the writing period in a cell that does not emit light is performed only in one or more subfield periods having a luminance weight of a preset value. The plasma display driving device according to claim 1, wherein: 8. The electric charge formation between the data electrode and the scanning electrode during the writing period in a cell which does not emit light is performed only when the number of cells turned on in one field period exceeds a preset threshold value. 2. The plasma display driving device according to claim 1, wherein the driving is performed. 9. The method according to claim 9, wherein charge formation between the data electrode and the scan electrode in the cell not emitting light during the writing period is performed only when the cell exists in the vicinity of the light emitting cell. The plasma display driving device according to claim 1. 10. A voltage application to the data electrode of a cell which does not emit light during a writing period of a predetermined pixel is performed only in one or more subfield periods having a luminance weighting of a preset value. Claim 2
7. The plasma display driving device according to any one of 6. 11. A voltage application to the data electrode of a cell which does not emit light during a writing period of a predetermined pixel is performed only when the number of cells turned on within one field period exceeds a preset threshold value. Claims 2 to 6
The plasma display driving device according to any one of the above. 12. A voltage application to the data electrode of a cell which does not emit light during a writing period of a predetermined pixel is performed only when the cell exists near a cell which emits light. 7. The plasma display driving device according to any one of items 1 to 6.