CN103229226A

CN103229226A - Method for driving plasma display panel, and plasma display apparatus

Info

Publication number: CN103229226A
Application number: CN2012800037946A
Authority: CN
Inventors: 坂井雄一; 盐崎裕也; 折口贵彦; 斋藤鲇彦; 坂田一朗
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2011-01-28
Filing date: 2012-01-26
Publication date: 2013-07-31
Also published as: WO2012102043A1; JPWO2012102043A1

Abstract

A stable write operation is performed during driving of a high-definition large-screen plasma display panel. Provided, therefore, is a drive method for driving a plasma display panel in which a single field is composed of subfields having an initialization period for performing a selective initialization operation in which a downwardly inclined waveform voltage that decreases toward a negative voltage is applied to a scanning electrode, a write period, and a sustain period in which sustain pulses the number of which corresponds to luminance weights are applied to a pair of display electrodes, wherein an upwardly inclined waveform voltage for generating an erase discharge in a discharge cell is applied to the scanning electrode after the final sustain pulse is generated in the sustain period. In a subfield having a relatively high luminance weight generated immediately before a subfield where the luminance weight is relatively low and where the selective initialization operation is performed in the initialization period, the maximum voltage of the upwardly inclined waveform voltage is set to a high voltage greater than the maximum voltage of the upwardly inclined waveform voltage generated in the subfield having the relatively low luminance weight.

Description

The driving method of Plasmia indicating panel and plasma display system

Technical field

The plasma display system of the Plasmia indicating panel that exchanges surface discharge type and the driving method of Plasmia indicating panel have been the present invention relates to adopt.

Background technology

As Plasmia indicating panel (below, abbreviate " panel " as) and representative interchange surface discharge type panel is formed with a plurality of discharge cells between by the front substrate of arranged opposite and back substrate.

Front substrate be formed with in parallel to each other on the glass substrate of side in front many to by 1 pair of scan electrode with to keep the show electrode that electrode constitutes right.Then, be formed with dielectric layer and protective seam according to covering the right mode of these show electrodes.

Back substrate forms a plurality of parallel data electrodes on the glass substrate of side overleaf, forms dielectric layer according to the mode that covers these data electrodes, further is formed with a plurality of next doors abreast with data electrode thereon.Then, be formed with luminescent coating on the surface of dielectric layer and the side in next door.

Then, according to show electrode pair and the clover leaf mode of data electrode, with front substrate and back substrate arranged opposite and seal.In the discharge space of sealed inside, enclose and to comprise the discharge gas that intrinsic standoff ratio for example is 5% xenon, pair form discharge cell at show electrode with the opposed part of data electrode.In the panel of this formation, in each discharge cell, produce ultraviolet ray by gas discharge, undertaken luminously by the fluorophor of all kinds of this ultraviolet ray exited redness (R), green (G) and blue (B), carry out colored image and show.

As the luminous and non-luminous 2 value controls in the combined discharge unit and in the method for the image display area display image of panel, the general son method that adopts.

In a son method, be divided into the different mutually a plurality of sons field of luminosity with 1.In addition, in each discharge cell, with desirable gray-scale value make up accordingly control each the son luminous/not luminous.Thus 1 luminosity is made as desirable gray-scale value and makes each discharge cell luminous,, show the image that constitutes by various gray-scale values in the image display area of panel.

In son method, during each son field has an initialization, write during and keep during.

During initialization, each scan electrode is applied waveform of initialization, in each discharge cell, produce the initialization action of initialization discharge.Thus, in each discharge cell, form the required wall electric charge of ensuing write activity, and generation is used for the stable initiation particle (being used to produce the excitation particle of discharge) that writes discharge that produces.

During writing, scan electrode is applied scanning impulse successively, and based on the picture signal that should show the data electrode is optionally applied and to write pulse.Thus, between scan electrode that should carry out luminous discharge cell and data electrode, produce and write discharge, formation wall electric charge in this discharge cell (below, these action general designations also note are done " writing ").

During keeping, to by scan electrode with to keep the show electrode that electrode constitutes right, alternately apply based on number of sustain pulses by each son luminance weights of determining.Thus, in having produced the discharge cell that writes discharge, produce and keep discharge, make the luminescent coating of this discharge cell luminous (below, will make the luminous situation of discharge cell remember that also work " lights " by keeping discharge, will not make the luminous situation of discharge cell remember that also work " do not light ").Thus, in each son field, make each discharge cell with luminous with the corresponding brightness of luminance weights.So, to make each discharge cell of panel luminous, at the image display area display image of panel with the corresponding brightness of the gray-scale value of picture signal.

The raising of contrast is arranged in one of factor important aspect the image display quality that improves panel.And, as one of son method, disclose and done one's utmost to reduce to show the irrelevant luminous driving method (for example, with reference to patent documentation 1) that improves the contrast ratio with gray scale.

In this driving method, force a certain initialization action in initialization action and the selection initialization action in during initialization, in described pressure initialization action, the tilt waveform voltage that adopts voltage slowly to rise produces the initialization discharge to whole discharge cells, in described selection initialization action, optionally produce the initialization discharge to having produced the discharge cell of keeping discharge in during the keeping of last son.And, will force the number of times of initialization action in 1, be made as 1 time, select initialization action in during initialization of other sons.

Show the brightness do not produce the black zone of keeping discharge (below, note by abridging be " shiny black degree ") according to the demonstration of image irrelevant luminous, for example change by the luminous etc. of initialization discharge generation.In addition, in above-mentioned driving method, show the luminous Weak-luminescence that becomes when carrying out in whole discharge cells, producing the pressure initialization action of initialization discharge in the black zone.Thus, thus can reduce shiny black degree shows the high image of contrast.

In addition, following driving method is also disclosed: by with show electrode to being divided into a plurality of group, and will force the number of times of initialization action in a plurality of, to be made as 1 time, show that thereby irrelevant luminous further reduction further reduces shiny black degree thereby make with gray scale, make contrast further improve (for example, with reference to patent documentation 2).

But, in forcing initialization action, have and will produce the effect of required wall electric charge accumulation in the discharge cell of discharging that write in during ensuing writing.In addition, the effect that produce to cause particle is arranged also, this initiations particle be used to shorten discharge delay time and reliably generation write discharge.This discharge delay time is meant that the voltage that discharge cell is applied surpasses discharge ionization voltage and produces the time that needs till the discharge to actual, and discharge delay time is long more, and it is unstable more that the generation of discharge becomes.

Therefore, if reduce the generation frequency of forcing initialization action, then have following worry: to write the required wall electric charge of discharge or cause the particle deficiency in order to produce, the discharge delay time that writes discharge is elongated, produces write activity and becomes unstable or do not produce the bad action that writes discharge etc.Particularly, do not produce in showing black discharge cell and keep discharge, so it is not enough easily to cause particle, it is unstable that write activity becomes easily.And, more in the panel of miniaturization, be easy to generate such phenomenon by the structure of high-finenessization and discharge cell.

And, unstable if write activity becomes, in discharge cell that should be luminous, do not produce and keep discharge, then normal image can't be shown on the panel.

[technical literature formerly]

[patent documentation]

Patent documentation 1:JP spy opens the 2000-242224 communique

Patent documentation 2:JP spy opens the 2006-091295 communique

Summary of the invention

The driving method of panel of the present invention, in 1, be equipped with the son field and drive panel, above-mentioned panel possesses a plurality of discharge cells, each discharge cell have by scan electrode and keep show electrode that electrode constitutes to and data electrode, above-mentioned son field have carry out scan electrode applied the initialization of selection initialization action of the descending tilt waveform voltage that descends towards negative voltage during, write during and to show electrode to apply with the keeping of the corresponding number of sustain pulses of luminance weights during.In this driving method, after last in during keeping kept pulse and produced, scan electrode applied be used for producing the up tilt waveform voltage of eliminating discharge at discharge cell.And, less relatively and during initialization, select in the relatively large son of the luminance weights that produces before son tight of initialization action in luminance weights, the maximum voltage of above-mentioned up tilt waveform voltage is set at the also high voltage of maximum voltage than the above-mentioned up tilt waveform voltage of generation in the less relatively son of luminance weights.

Thus, even when driving, also can carry out stable write activity, can be shown on the panel by the image that quality is high by the panel of the big picture of high-finenessization.

In addition, in the driving method of panel of the present invention, also can be provided with during the discrete cell initialization, mix to exist in during this discrete cell initialization scan electrode is applied with the pressure initialization action of line tilt waveform voltage and descending tilt waveform voltage and scan electrode is applied the selection system initialization action of descending tilt waveform voltage, be made as during the discrete cell initialization during the initialization of the sub-field that luminance weights is less relatively.

In addition, in the driving method of panel of the present invention, also can in same, produce the relatively large son of an above-mentioned luminance weights relative less sub-field continuously with above-mentioned luminance weights.

In addition, in the driving method of panel of the present invention, also can the voltage that scan electrode is applied temporarily be descended by before the voltage that scan electrode is applied rises to maximum voltage, and the voltage that scan electrode is applied is risen, produce above-mentioned up tilt waveform voltage.

In addition, plasma display system of the present invention, it possesses: panel, it possesses a plurality of discharge cells, each discharge cell have by scan electrode and keep show electrode that electrode constitutes to and data electrode; And driving circuit, it is equipped with son field and drives panel in 1, above-mentioned son field have carry out scan electrode applied the initialization of selection initialization action of the descending tilt waveform voltage that descends towards negative voltage during, write during and to show electrode to apply with the keeping of the corresponding number of sustain pulses of luminance weights during.In this plasma display device, after driving circuit, last in during keeping are kept pulse and produced, scan electrode applied be used for producing the up tilt waveform voltage of eliminating discharge at discharge cell.And, less relatively and during initialization, select in the relatively large son of the luminance weights that produces before son tight of initialization action in luminance weights, the maximum voltage of the tilt waveform voltage that rises is set at the also high voltage of maximum voltage than the above-mentioned up tilt waveform voltage of generation in the less relatively son of luminance weights.

In addition, in the plasma display system of the present invention, driving circuit also can be provided with during the discrete cell initialization, mix to exist in during this discrete cell initialization scan electrode is applied with the pressure initialization action of line tilt waveform voltage and descending tilt waveform voltage and scan electrode is applied the selection system initialization action of descending tilt waveform voltage, be made as during the discrete cell initialization during the initialization of the sub-field that above-mentioned luminance weights is less relatively.

In addition, in the plasma display system of the present invention, driving circuit also can produce the relatively large son of an above-mentioned luminance weights relative less sub-field with above-mentioned luminance weights continuously in same.

In addition, in the plasma display system of the present invention, driving circuit also can be by before the voltage that scan electrode is applied rises to maximum voltage, the voltage that scan electrode is applied is temporarily descended, and the voltage that scan electrode is applied is risen, produce above-mentioned up tilt waveform voltage.

Description of drawings

Fig. 1 is the exploded perspective view of the structure of the panel that uses in the plasma display system of expression in the embodiments of the present invention 1.

Fig. 2 is the electrode spread figure of the panel that uses in the plasma display system in the embodiments of the present invention 1.

The figure of Fig. 3 driving voltage waveform that to be expression apply each electrode of the panel that uses in the plasma display system in the embodiments of the present invention 1.

Fig. 4 is the circuit block diagram of the plasma display system in the embodiments of the present invention 1.

Fig. 5 is the circuit diagram of formation that schematically shows the scan electrode driving circuit of the plasma display system in the embodiments of the present invention 1.

Fig. 6 is used for the time diagram that the action to the driving circuit of the plasma display system of embodiments of the present invention 1 describes.

The figure of Fig. 7 driving voltage waveform that to be expression apply each electrode of the panel that uses in the plasma display system in the embodiments of the present invention 2.

Embodiment

Below, use accompanying drawing that the plasma display system in the embodiments of the present invention is described.

(embodiment 1)

Fig. 1 is the exploded perspective view of the structure of the panel 10 that uses in the plasma display system of expression in the embodiments of the present invention 1.

On the front substrate 21 of glass, form a plurality of by scan electrode 22 with keep show electrode that electrode 23 constitutes to 24.Then, form dielectric layer 25 with the mode of keeping electrode 23, on this dielectric layer 25, form protective seam 26 according to covering scan electrode 22.

Protective seam 26 is in order to be easy to generate the discharge in the discharge cell, and by with the high material of electronics release performance, be that magnesium oxide (MgO) is that the material of major component forms.

Protective seam 26 can be made of 1 layer, perhaps also can be made of a plurality of layers.In addition, also can be the formation that on layer, has particle.

Form a plurality of data electrodes 32 overleaf on the substrate 31, form dielectric layer 33, further form the next door 34 of groined type thereon according to the mode of covers data electrode 32.Then, the side of next door 34 and dielectric layer 33 are provided with the luminous luminescent coating 35 that carries out of all kinds with red (R), green (G) and blue (B).

With these front substrates 21 and back substrate 31, according to clipping small discharge space and show electrode to the 24 mode arranged opposite of intersecting with data electrode 32, the gap of substrate 21 and back substrate 31 is provided with discharge space in front.Then, with of the encapsulant sealing of its peripheral part with frit etc.Then, the discharge space of portion within it, the mixed gas of for example enclosing neon (Ne) and xenon (Xe) is as discharge gas.

Discharge space is divided into a plurality of zones by next door 34, to 24 parts of intersecting with data electrode 32, forms the discharge cell that constitutes pixel at show electrode.And, by in these discharge cells, discharge, luminous (lighting), thereby on panel 10 image of display color.

In addition, in panel 10, by 3 continuous discharge cells of on the directions of show electrode, arranging to 24 extensions, that is, carry out luminous discharge cell, carry out luminous discharge cell and carry out these 3 discharge cells of luminous discharge cell constituting 1 pixel with blue (B) with green (G) with red (R).

In addition, the structure of panel 10 is not limited to above-mentioned structure, also can be the structure that for example possesses the next door of striated.

Fig. 2 is the electrode spread figure of the panel 10 that uses in the plasma display system in the embodiments of the present invention 1.

In panel 10, arranged along continuous straight runs (line direction, the line direction) n root scan electrode SC1～scan electrode SCn (scan electrode 22 of Fig. 1) of Yan Changing and n root are kept electrode SU1～keep electrode SUn (Fig. 1 keep electrode 23), have arranged m single data electrode D1～data electrode Dm (data electrode 32 of Fig. 1) that vertically (column direction) prolongs.

And, at 1 couple of scan electrode SCi (i=1～n) and keep electrode SUi and 1 data electrode Dj (zone of j=1～m) intersect forms 1 discharge cell.That is, form m discharge cell on to 24, form m/3 pixel at 1 pair of show electrode.And, in discharge space, forming m * n discharge cell, the zone that has formed m * n discharge cell becomes the image display area of panel 10.For example, in pixel count is 1920 * 1080 panel, m=1920 * 3, n=1080.In addition, in the present embodiment, though n=1080, the present invention at all is not limited to this numerical value.

Next, the driving method to the panel 10 of the plasma display system in the present embodiment describes.In addition, the plasma display system in the present embodiment carries out the gray scale demonstration by a son method.In son method, on time shaft, be divided into a plurality of sons with 1, each son field is set luminance weights respectively.During each height field has an initialization, write during and keep during.And, by by each the son control each discharge cell luminous/not luminous, thus at panel 10 display images.

Luminance weights is the parameter that is illustrated in the ratio of the size of the brightness of demonstration in each son field, in each son field, produces and the corresponding number of sustain pulses of luminance weights during keeping.Therefore, for example, luminance weights is that the son of " 8 " is luminous for about 8 times brightness of the son of " 1 " with luminance weights, be that about 4 times brightness of son field of " 2 " is luminous with luminance weights.Therefore, by making each son optionally luminous various gray scales, energy display image of showing to make up accordingly with picture signal.

In the present embodiment, following Example is described: be divided into 10 sons (a son SF1, a son SF2 1,, a son SF10), according to the big more mode of sub-field brightness weight after leaning in time, each son field has (1,2,3 respectively, 6,11,18,30,44,60,80) luminance weights.

In the present embodiment, constitute, can be respectively show red image signal (R signal), green video signal (G signal), blue image signal (B signal) with 0 to 255 256 gray scales by this.

During initialization, produce the initialization discharge, on each electrode, form the ensuing initialization action that writes the required wall electric charge of discharge.In the initialization action at this moment, exist in whole discharge cell and produce the pressure initialization action of initialization discharge and in during the keeping of last son, produced the selection initialization action that the discharge cell of keeping discharge optionally produces the initialization discharge.

During writing, carry out in discharge cell that should be luminous, optionally producing and write discharge, form the write activity of keeping the required wall electric charge of discharge.

In addition, keep action in during keeping, keep in the action, show electrode is alternately applied and the corresponding number of sustain pulses of luminance weights that is predetermined by each son field 24 at this, in having produced the discharge cell that writes discharge, produce and keep discharge, make this discharge cell luminous.

In addition, in the present embodiment, during the initialization of 1 son among constituting a plurality of sons of 1 in, carry out " discrete cell initialization action ", during initialization of other sons in, in whole discharge cells, select initialization action.

The discrete cell initialization action is meant, forces initialization action in specific discharge cell, selects the initialization action of initialization action in other discharge cells.Therefore, during the initialization of carrying out the discrete cell initialization action in, specific discharge cell is applied the waveform of initialization that is used to force initialization action, other discharge cells are applied the waveform of initialization that is used to select initialization action.

Below, will be used to force the waveform of initialization of initialization action to be called " pressure waveform of initialization ", will be used to select the waveform of initialization of initialization action to be called " selection waveform of initialization ".In addition, will carry out being called " during the discrete cell initialization " during the initialization of discrete cell initialization action, the son field that will have during the discrete cell initialization is called " the initial beggar of discrete cell field ".In addition, will in whole discharge cells, select to be called during the initialization of initialization action " selecting during the initialization ", will have the son field of selecting during the initialization and be called " selecting initial beggar field ".

In addition, in the present embodiment, each initial son (a son SF1) is made as the initial beggar of discrete cell field, (a son SF2 is to a son SF10) is made as the initial beggar of selection field with other sons.

In addition, in the present embodiment, the son that back produces on the time in the field is just established luminance weights big more.

In the present embodiment, 11 son group that comprises that a plurality of sons field of being gone up sub-field brightness weight that the back produces and increased more by time constitutes.

But in the present embodiment, quantity, each luminance weights of sub of constituting 1 son field are not limited to above-mentioned value.In addition, also can be based on picture signal and wait the structure of switching a son formation.

The figure of Fig. 3 driving voltage waveform that to be expression apply each electrode of the panel 10 that uses in the plasma display system in the embodiments of the present invention 1.

In Fig. 3, represent: respectively to carry out the scan electrode SC1 of write activity at first in during writing, during writing in the 2nd scan electrode SC2 that carries out write activity, keep electrode SU1～keep electrode SUn and driving voltage waveform that data electrode D1～data electrode Dm applies.

In addition, in Fig. 3, represent: as the son field SF1 of the initial beggar of discrete cell field, as sub later driving voltage waveform of a son SF2 who selects initial beggar field.The initial beggar of discrete cell field with select in the initial beggar field, during initialization to the waveform shape difference of the driving voltage that scan electrode SC1～scan electrode SCn applies.

In addition, 2 fields of expression in Fig. 3.In 1 field, during the initialization of son the SF1 of initial beggar field as discrete cell (during the discrete cell initialization) scan electrode SC1 is applied the pressure waveform of initialization, scan electrode SC2 is applied the selection waveform of initialization.In other 1 field, scan electrode SC2 is applied the pressure waveform of initialization in during the initialization of son SF1, scan electrode SC1 is applied the selection waveform of initialization.

In addition, the driving voltage waveform in the later son of son SF3, the generation of keeping pulse in during keeping is counted the difference, with the driving voltage waveform of a son SF2 much at one.

But about son SF10, it is different that being used to produce of the waveform shape that is used for producing the up tilt waveform voltage of eliminating discharge and other sons eliminated the up tilt waveform voltage that discharges.This details aftermentioned.

In addition, following scan electrode SCi, keep electrode Sui, data electrode Dk and represent the electrode selected among each electrode based on view data (represent each son data of lighting/not lighting).

At first, the son SF1 as the initial beggar of discrete cell field is described.

In the present embodiment, in the initial beggar of the discrete cell field of the 1st field (a son SF1), from configuration according to from the 1st of last beginning, the 3rd, the 5th ... such order, (individual (N is the integer more than the 0) scan electrode SC (1+2 * N), apply the pressure waveform of initialization that is used to force initialization action of 1+2 * N) to.Then, from configuration, according to from the 2nd of last beginning, the 4th, the 6th ... such order, (individual (N is the integer more than the 0) scan electrode SC (2+2 * N), apply the selection waveform of initialization that is used to select initialization action of 2+2 * N) to.

In the initial beggar of the discrete cell field of the 2nd field (a son SF1), from configuration, according to from the 2nd of last beginning, the 4th, the 6th ... order, (the scan electrode SC of individual (N is the integer more than the 0) (2+2 * N), apply the pressure waveform of initialization that is used to force initialization action of 2+2 * N) to.In addition, from configuration, according to from the 1st of last beginning, the 3rd, the 5th ... such order, (individual (N is the integer more than the 0) scan electrode SC (1+2 * N), apply the selection waveform of initialization that is used to select initialization action of 1+2 * N) to.

Fig. 3 represents that (the scan electrode SC1 of the typical example of 1+2 * N), expression is as scan electrode SC (the scan electrode SC2 of the typical example of 2+2 * N) as scan electrode SC.

The first half of Ti1 applies voltage 0 (V) to data electrode D1～data electrode Dm during the initialization of son the SF1 that carries out the discrete cell initialization action, to keeping electrode SU1～keep electrode SUn also to apply voltage 0 (V).To applying the scan electrode SC that forces waveform of initialization (1+2 * N) (for example, scan electrode SC1), apply the after-applied voltage Vi1 of voltage 0 (V), applying from voltage Vi1 towards voltage Vi2 the slowly up tilt waveform voltage of (for example, the gradient of about 5V/ μ sec) rising.

At this moment, voltage Vi1 is with respect to keeping electrode SU (1+2 * N) be set at the voltage lower than discharge ionization voltage (promptly, do not produce the voltage of discharge at discharge cell), (1+2 * N) is set at voltage above discharge ionization voltage (that is, no matter former discharge have or not the voltage that produces discharge at discharge cell) to voltage Vi2 with respect to keeping electrode SU.

During this up tilt waveform voltage rising, the scan electrode SC of each discharge cell (1+2 * N) and keep electrode SU (between the 1+2 * N) and scan electrode SC (1+2 * N) and between data electrode D1～data electrode Dm continues to produce faint initialization discharge respectively.At this moment, the luminescent coating 35 of discharge cell is luminous a little.

Then, (accumulate the wall voltage of negative polarity on the 1+2 * N), in that (data electrode D1～data electrode Dm of 1+2 * N) intersect goes up and keeps electrode SU and (on the 1+2 * N), accumulates the wall voltage of positive polarity with scan electrode SC at scan electrode SC.And, also produce the initiation particle that shortens the discharge delay time (it is long to the time that produces till discharging at discharge cell to surpass discharge ionization voltage from the voltage that discharge cell is applied) that writes discharge.

In addition, the wall voltage on the electrode represent on the dielectric layer 25 by coated electrode, on the protective seam 26, the voltage of the luminescent coating 35 first-class wall charge generation of accumulating.

Ti1's is latter half of during the initialization of son SF1, to keeping electrode SU1～keep electrode SUn to apply positive voltage Ve, data electrode D1～data electrode Dm is applied voltage 0 (V).To scan electrode SC (1+2 * N) (and for example, scan electrode SC1, scan electrode SC3, scan electrode SC5 ...), apply from voltage Vi3 towards negative voltage Vi4 the slowly descending tilt waveform voltage of (for example, the gradient of pact-2.5V/ μ sec) decline.

(1+2 * N) is set at the voltage that is lower than discharge ionization voltage to voltage Vi3, and (1+2 * N) is set at the voltage above discharge ionization voltage to voltage Vi4 with respect to keeping electrode SU with respect to keeping electrode SU.

Will this descending tilt waveform voltage impose on scan electrode SC (1+2 * N) during, at the scan electrode SC of each discharge cell (1+2 * N) and keep electrode SU (between the 1+2 * N), and scan electrode SC (1+2 * N) and between data electrode D1～data electrode Dm produces faint initialization discharge respectively.

Thus, scan electrode SC (wall voltage of the negative polarity on the 1+2 * N), keep electrode SU (wall voltage of the positive polarity on the 1+2 * N) and with scan electrode SC (wall voltage of the positive polarity on data electrode D1～data electrode Dm of 1+2 * N) intersect, the voltage of the write activity in being adjusted to during being suitable for writing.And, also produce the initiation particle that shortens the discharge delay time that writes discharge.

Above voltage waveform is no matter how the action of last son field all produces the pressure waveform of initialization of initialization discharge at discharge cell.In addition, be to force initialization action with the action of forcing waveform of initialization to impose on scan electrode 22.In addition, in a son SF1 of the 1st field, from configuration, ((initialization action the discharge cell of 1+2 * N) form becomes no matter how the action of last son all produces the pressure initialization action of initialization discharge at discharge cell the individual scan electrode SC of 1+2 * N) from last beginning the.

On the other hand, the first half of Ti1 during the initialization of a son SF1, to scan electrode SC (2+2 * N) (for example, scan electrode SC2, scan electrode SC4, scan electrode SC6 ...) do not apply voltage Vi1, and apply the up tilt waveform voltage that slowly rises from voltage 0 (V) towards voltage Vi5.This up tilt waveform voltage be with impose on scan electrode SC (the identical gradient of up tilt waveform voltage of 1+2 * N), the voltage waveform of the identical time that continued to rise.Therefore, voltage Vi5 becomes the voltage that the voltage that deducts voltage Vi1 with voltage Vi2 and obtain equates.

At this moment, become according to voltage Vi5 that not enough (mode of the voltage of the discharge ionization voltage of 2+2 * N) is set each voltage with respect to keeping electrode SU.Thus, in the discharge cell that has applied this up tilt waveform voltage, do not produce discharge in fact.

Ti1's is latter half of during the initialization of son SF1, and (2+2 * N) applies and imposes on scan electrode SC (the identical descending tilt waveform voltage of descending tilt waveform voltage of 1+2 * N) to scan electrode SC.

Will this descending tilt waveform voltage impose on scan electrode SC (2+2 * N) during, during the keeping of last son (being a son SF10 among Fig. 3), produced in the discharge cell of keeping discharge, produces faint initialization and discharges.Then, by this initialization discharge, the voltage of the write activity in during the wall voltage of the positive polarity on the wall voltage of the negative polarity of scan electrode 22, the wall voltage of keeping the positive polarity on the electrode 23 and the data electrode 32 is adjusted to and is suitable for writing.

So, the wall voltage in the discharge cell is adjusted to the wall voltage that is suitable for write activity.And, also produce the initiation particle that shortens the discharge delay time that writes discharge.

On the other hand, during the keeping of last son (a son SF10), not have to produce and keep in the discharge cell of discharge, do not produce the initialization discharge, keep wall voltage in the past.

Above voltage waveform is the selection waveform of initialization that Tw has carried out optionally producing in the discharge cell of write activity the initialization discharge during the writing of last son.In addition, be to select initialization action with the action of selecting waveform of initialization to impose on scan electrode 22.In addition, in a son SF1 of the 1st field, from configuration, from last beginning the (the individual scan electrode SC of 2+2 * N) (initialization action the discharge cell of 2+2 * N) form, the selection initialization action of having carried out optionally producing in the discharge cell of write activity the initialization discharge in becoming during the writing of last son.

By above-mentioned, the discrete cell initialization action during the initialization of the initial beggar of discrete cell field (a son SF1) among the Ti1 finishes.Then, during the initialization of the initial beggar of discrete cell field, among the Ti1, force the discharge cell of initialization action to mix existence with the discharge cell of selecting initialization action.

Next, Tw during writing is described.

During the writing of son SF1 among the Tw, during initialization, after Ti1 latter half of, data electrode D1～data electrode Dm is applied voltage 0 (V), to keeping electrode SU1～keep electrode SUn to apply voltage Ve.And, scan electrode SC1～scan electrode SCn is applied voltage Vc.

Next, to carrying out the 1st scan electrode SC1 that goes of write activity at first, apply the scanning impulse of negative voltage Va.Then, to answering the data electrode Dk of luminous discharge cell in the 1st row among data electrode D1～data electrode Dm, apply the pulse that writes of positive voltage Vd.At this moment, the voltage difference of the cross part of data electrode Dk and scan electrode SC1 surpasses discharge ionization voltage, produces discharge between data electrode Dk and scan electrode SC1.

In addition, because to keeping electrode SU1～keep electrode SUn to have applied voltage Ve, be unlikely to discharge but be easy to generate the state of discharge so keep to become between electrode SU1 and the scan electrode SC1.

Thus, under the effect of the discharge that produces between data electrode Dk and the scan electrode SC1, producing discharge between electrode SU1 and the scan electrode SC1 keeping of the zone that intersects with data electrode Dk.So, produce at discharge cell that should be luminous and to write discharge, on scan electrode SC1, accumulate positive wall voltage, accumulate negative wall voltage on the electrode SU1 keeping, on data electrode Dk, also accumulate negative wall voltage.

So, carry out in the 1st row, in discharge cell that should be luminous, producing the write activity that writes discharge and on each electrode, accumulate wall voltage.On the other hand, do not surpass discharge ionization voltage, do not write discharge so do not produce owing to apply the voltage of the data electrode 32 that writes pulse and the cross part of scan electrode SC1.

Next, the 2nd scan electrode SC2 that carries out write activity applied scanning impulse, and to the 2nd row that carries out write activity should the luminous pairing data electrode Dk of discharge cell, apply and write pulse.Be applied at the same time to produce in scanning impulse and the discharge cell that writes pulse and write discharge, carried out write activity.

Above write activity is proceeded to the capable discharge cell of n successively, and Tw finishes during writing.So, during writing among the Tw, write discharge should luminous discharge cell optionally producing,, forms to produce among the Ts1 during ensuing the keeping and keep the required wall electric charge that discharges at this discharge cell.

Next, Ts1 during keeping is described.

During the keeping of son SF1, among the Ts1, data electrode D1～data electrode Dm is applied voltage 0 (V).Then, to keeping electrode SU1～keep electrode SUn to apply voltage 0 (V), and scan electrode SC1～scan electrode SCn is applied the pulse of keeping of positive voltage Vs.

In having produced the discharge cell that writes discharge, scan electrode SCi surpasses discharge ionization voltage with the voltage difference of keeping electrode SUi, scan electrode SCi with keep between the electrode SUi generation and keep discharge.Then, by the ultraviolet ray by this discharge generation, luminescent coating 35 carries out luminous.

In addition,, on scan electrode SCi, accumulate negative wall voltage, accumulate positive wall voltage on the electrode SUi keeping by this discharge.And, on data electrode Dk, also accumulate positive wall voltage.Positive wall voltage on this data electrode Dk is to produce to write the required wall voltage of discharge in ensuing son field.

Tw does not have to produce and writes in the discharge cell of discharge during writing, and does not produce and keeps discharge, the wall voltage the during end that keeps Ti1 during the initialization.

Then, scan electrode SC1～scan electrode SCn is applied voltage 0 (V), to keeping electrode SU1～the keep pulse of keeping that electrode SUn applies voltage Vs.Produced in the discharge cell of keeping discharge before tight, the voltage difference of keeping electrode SUi and scan electrode SCi surpasses discharge ionization voltage.

Thus, keep discharge keeping between electrode SUi and the scan electrode SCi to produce once more, by the ultraviolet ray by this discharge generation, luminescent coating 35 carries out luminous.Then, accumulate negative wall voltage on the electrode SUi keeping, on scan electrode SCi, accumulate positive wall voltage.

Below same, to scan electrode SC1～scan electrode SCn with keep electrode SU1～keep electrode SUn, apply alternately that luminance weights multiply by the brightness multiplying power of regulation and the number of sustain pulses that obtains.Thus, during writing, produced in the discharge cell that writes discharge, continued to produce and keep discharge.

Then, during keeping, produced among the Ts1 whole keep pulse after, promptly, after last during keeping among the Ts1 kept pulse and produced, to keeping electrode SU1～keep electrode SUn and data electrode D1～data electrode Dm has applied under the state of voltage 0 (V), scan electrode SC1～scan electrode SCn is applied with the line tilt waveform voltage, this up tilt waveform voltage be from reference potential, promptly be lower than discharge ionization voltage voltage 0 (V) slowly (gradient of for example about 5V/ μ sec) rise to voltage till the voltage Vr1.

By voltage Vr1 being made as voltage, thereby, produce faint discharge having produced the keeping between electrode SUi and the scan electrode SCi of the discharge cell of keeping discharge above discharge ionization voltage.This faint discharge scan electrode SC1～scan electrode SCn is applied apply voltage surpass discharge ionization voltage and rise during, produce constantly.

By the charged particle of this faint discharge generation, accumulated keeping on the electrode SUi and on the scan electrode SCi, become the wall electric charge, accumulate the voltage difference of keeping between electrode SUi and the scan electrode SCi with mitigation.That is, the discharge that produces by this up tilt waveform voltage plays a role as eliminating discharge.Thus, in having produced the discharge cell of keeping discharge, residual under the state of the positive wall voltage on the data electrode Dk, eliminate scan electrode SCi and keep part or all of wall voltage on the electrode SUi.

In addition, in the present embodiment, voltage Vr1 is set at than the low voltage of voltage Vs of keeping pulse.

And, after the voltage that rises reaches the voltage Vr1 that is predetermined, will be reduced to voltage 0 (V) to the voltage that applies that scan electrode SC1～scan electrode SCn applies.So, keep release among the Ts1 during keeping.

During the initialization of son SF2, among the Ti2, data electrode D1～data electrode Dm is applied voltage 0 (V), to keeping electrode SU1～keep electrode SUn to apply voltage Ve.

To scan electrode SC1～scan electrode SCn, apply the descending tilt waveform voltage that slowly descends from the voltage Vi3 ' that the is lower than discharge ionization voltage voltage 0 (V) of reference potential (for example, as) towards the negative voltage Vi4 that surpasses discharge ionization voltage.

The gradient of this descending tilt waveform voltage can be identical with the gradient of the descending tilt waveform voltage of Ti1 generation during the initialization of a son SF1, as its 1 example, for example can enumerate the such numerical value of pact-2.5V/ μ sec.

Thus, Ts1 has produced in the discharge cell of keeping discharge during the keeping of last son (being a son SF1 among Fig. 3), and produces faint initialization and discharges.And the wall voltage that scan electrode SCi goes up and keeps on the electrode SUi is weakened, and the wall voltage on the data electrode Dk also is adjusted to the value that is suitable for write activity.

On the other hand, Ts1 has produced and has not produced the initialization discharge in the discharge cell of keeping discharge during the keeping of last son, the wall electric charge when keeping Ti1 end during the initialization of last son.So the initialization action among the son SF2 finishes.

Like this, the initialization action among son the SF2 becomes following selection initialization action: only during the writing of last son Tw produce write discharge and keeping during Ts1 produced and produced the initialization discharge in the discharge cell of keeping discharge.

The selection waveform of initialization that produces among the Ti1 during the initialization of son SF1, with the initialization of son field SF2 during the waveform shape of the selection waveform of initialization that produces among the Ti2 different mutually.But, about the selection waveform of initialization that produces among the Ti1 during the initialization of a son SF1, the first half of Ti1 does not produce discharge during initialization, during the initialization during the initialization of the latter half of action of Ti1 and son SF2 the selection initialization action essence among the Ti2 identical.Therefore, in the present embodiment, among the Ti1, the waveform of initialization that will apply the discharge cell of not forcing initialization action is made as the selection waveform of initialization during the initialization of a son SF1.

During the writing of son SF2 among the Tw, to each electrode apply with the writing of son field SF1 during the identical driving voltage waveform of Tw.

During the keeping of son SF2 Ts1 also with the keeping of a son SF1 during Ts1 identical, will with the corresponding number of sustain pulses of luminance weights, alternately impose on scan electrode SC1～scan electrode SCn and keep electrode SU1～keep electrode SUn.And, after last during keeping among the Ts1 kept pulse and produced, produce and slowly rise to the up tilt waveform voltage of voltage Vr1, and be applied to scan electrode SC1～scan electrode SCn from voltage 0 (V), produce and eliminate discharge.

Among each sub, the quantity of keeping pulse that in Ts1 during keeping, produces, each electrode is applied and a son identical driving voltage waveform of SF2 from a son SF3 to a son SF9.

During as the initialization of the son SF10 of 1 final son Ti2 and write during among the Tw, each electrode is applied the identical driving voltage waveform with son field SF2.In addition, during the keeping of son SF10 among the Ts2, except the generation number of keeping pulse, to show electrode to 24 alternately apply with the keeping of a son SF2 during among the Ts1 keep pulsion phase with keep pulse.

But, be used for the up tilt waveform voltage of the elimination discharge that Ts2 produces during the keeping of son SF10, compare the waveform shape difference with the up tilt waveform voltage that is used for the elimination discharge that Ts1 produces during the keeping of a son SF2.

During the keeping of son SF10 among the Ts2, after last during keeping among the Ts2 kept pulse and produced, generation rises to the up tilt waveform voltage of voltage Vr2 from voltage 0 (V) slow (for example, the gradient of about 5V/ μ sec), and is applied to scan electrode SC1～scan electrode SCn.In the present embodiment, voltage Vr2 is set at the voltage higher than voltage Vr1.

That is, during the keeping of son SF10, among the Ts2, produce and rise to the up tilt waveform voltage of the voltage Vr2 that is higher than voltage Vr1, and be applied to scan electrode SC1～scan electrode SCn from voltage 0 (V).So, in having produced the discharge cell of keeping discharge, produce to eliminate discharge, with scan electrode SCi and part or all elimination of keeping the wall voltage on the electrode SUi.

In addition, in the present embodiment, voltage Vr2 is set at than the high voltage of voltage Vs of keeping pulse.

More than be in the present embodiment to the summary of the driving voltage waveform of each electrode of imposing on panel 10 when the display image.

In addition, the size of the voltage that in the present embodiment each electrode is applied for example is: voltage Vi1=147 (V), voltage Vi2=362 (V), voltage Vi3=215 (V), voltage Vi4=-180 (V), voltage Vi5=215 (V), voltage Vc=-58 (V), voltage Va=-205 (V), voltage Vs=215 (V), voltage Vr1=203 (V), voltage Vr2=255 (V), voltage Ve=155 (V), voltage Vd=58 (V).

In addition, for example, the gradient of the up tilt waveform voltage that scan electrode SC1～SCn is applied is 5 (V/ μ sec), and the gradient of descending tilt waveform voltage is-2.5 (V/ μ sec).

But the concrete numerical value of above-mentioned magnitude of voltage or time, gradient etc. is 1 example only, and among the present invention, each magnitude of voltage or time, gradient etc. are not limited to above-mentioned numerical value.Each magnitude of voltage or time, gradient etc. are preferably set best according to the flash-over characteristic of panel, the specification of plasma display system etc.For example, also can be voltage Vi5=voltage Vi3.

In the present embodiment, (an a son SF1～son SF10) constitutes 1 by 10 sons, in each son, goes up the big more mode of sub-field brightness weight of back generation according to time and sets luminance weights.

Therefore, if the big more so continuous in time a plurality of sons field of the sub-field brightness weight of back generation in time is made as 1 son field group, then in the present embodiment, can regard 11 son group that is made of 10 sub-places of a son SF1～son SF10 as constitutes.

And, in the present embodiment, less relatively and during initialization, select in the relatively large son field of the luminance weights that produces before son tight of initialization action in luminance weights, the maximum voltage of the up tilt waveform voltage that will produce in order to eliminate discharge is set at the high voltage of maximum voltage of the up tilt waveform voltage of the elimination discharge usefulness that produces in the less relatively son of specific luminance weight.

In the present embodiment, above-mentioned, luminance weights is less relatively and select the son of initialization action during initialization, is a son SF1 who has luminance weights " 1 " and carry out the discrete cell initialization action during initialization.In addition, the above-mentioned relatively large son field of luminance weights is the son SF10 with luminance weights " 80 ".

In other words, in the present embodiment, during the keeping of the son of the last generation of 1 son group in, the maximum voltage of the up tilt waveform voltage that will produce in order to eliminate discharge be made as voltage Vr2.And, with voltage Vr2, be set at maximum voltage, be the also high voltage of voltage Vr1 than the up tilt waveform voltage that produces in order to eliminate discharge in during the keeping of other sons.

Promptly, in the present embodiment, the maximum voltage of the up tilt waveform voltage that produces in order to eliminate discharge in will be during the keeping of son SF10 is made as voltage Vr2, and the maximum voltage of the up tilt waveform voltage of generation is made as voltage Vr1 in order to eliminate discharge in will be during the keeping of each son of a son SF1～son SF9.And, voltage Vr2 is set at the voltage higher than voltage Vr1.

It is the reasons are as follows.

In the present embodiment, each discharge cell carries out 1 time in continuous a plurality of (for example, continuous in the present embodiment 2 fields) forces initialization action.Thus, with each discharge cell 1 constituent ratio of carrying out forcing for 1 time initialization action, reduced the generation frequency of forcing initialization action, reduced and shown irrelevant luminous with gray scale.So, the plasma display system 40 in the present embodiment has reduced the shiny black degree in the display image, and the image that degree of comparing is high shows.

But, as described above, if the generation frequency of initialization action is forced in reduction, then there is following worry: be used to produce write and discharge required wall electric charge and cause the particle deficiency, make write activity become unstable, perhaps produce and be not easy to produce the bad action that writes discharge etc.

In having produced the discharge cell of keeping discharge, during the initialization of ensuing son field, produce the initialization discharge.And the wall electric charge that is accumulated in discharge cell is adjusted to the wall voltage that is suitable for write activity by the initialization discharge.Therefore, in having produced the discharge cell of keeping discharge, during the writing of ensuing son, can carry out stable write activity.

But, there be not generation to keep in the discharge cell of discharge, if ensuing son field is the initial beggar of selection field, then during selecting initialization, it does not produce the initialization discharge.And, in such discharge cell, write discharge or keep discharge as if producing at adjacent discharge cell, then the wall electric charge in the discharge cell reduces and the unsettled phenomenon of generation write activity.This phenomenon is known as " electric charge is escaped phenomenon ".In addition, electric charge is escaped phenomenon and more is easy to generate in the panel of miniaturization at the structure of high-finenessization and discharge cell.

For this reason, the application's inventor has investigated electric charge and has escaped phenomenon.And, to have confirmed do not carrying out write activity, the son that initialization discharge does not produce produces in the discharge cell more than 2 continuously, produces to write bad probability and uprise.

And as the result behind the further probe, following phenomenon becomes clear.

Wherein, below, will not carry out write activity, the sub-script holder that the initialization discharge does not also produce does " not sending out photon field ".In addition, following " concern unit " is not send out the photon field discharge cell of generation more than 2 continuously.

Do not send out in the photon field at the 1st that pays close attention to the unit, write discharge if produce at the discharge cell adjacent with this concerns unit, then sometimes in this concerns unit regardless of the discharge that writes that does not also apply a little less than writing pulse and all producing.The discharge that writes that should be weak writes discharge for mistake.

If produce mistake and write discharge paying close attention to the unit, also produce discharge in then during ensuing keeping.But this discharge is weak discharge, keeps discharge and does not grow and disappear.And, by producing this discharge, thereby on data electrode 32, accumulate positive wall voltage.But this wall voltage is owing to being to produce by weak discharge, so it is little to compare the regular wall voltage of accumulating when generation is normal keeps discharge.

In ensuing son field, carry out in the discharge cell of write activity, write pulse, so the normal probability height that writes discharge that produces owing to data electrode 32 is applied.

But, in ensuing son field, do not carry out write activity even pay close attention to the unit yet.Therefore, if write discharge, then there is following worry: in this concern unit, be subjected to the influence that it writes discharge, produce once more and write discharge by mistake in this discharge cell generation adjacent with paying close attention to the unit.But it is to write the more weak discharge of discharge than last time mistake that this mistake writes discharge.Therefore, write discharge, also can not produce discharge in during ensuing keeping even produced this mistake.

Its result, residual negative wall voltage on data electrode 32.Therefore, after, till forcing initialization action, existence can not produce the possibility that writes discharge.

Based on above reason, do not carrying out write activity, the photon field of not sending out that does not also produce initialization discharge produces in the discharge cell more than 2 continuously, produces to write bad probability and uprise.

In the plasma display system 40 in the present embodiment, each discharge cell among the Ti1, is forced certain initialization action of initialization action or selection initialization action during the initialization of a son SF1 of the initial beggar field as discrete cell.And, in a plurality of sub of 1 of formation, luminance weights is set in each sub-field according to the mode that the sub-field brightness weight of back generation in time is big more.

Therefore, the last son field with sub SF1 of minimum luminance weights " 1 " is 1 final son field, is the son field with maximum luminance weights " 80 ".

When general dynamic image is shown in panel 10, confirmed son that luminance weights is little, it is high more to carry out luminous probability, the son that luminance weights is big, it is low more to carry out luminous probability.

Therefore, if the son of representing as 1 an example in the present embodiment formation, it is relatively low that then a relatively large son SF9 of luminance weights and a son SF10 carry out luminous probability, and it is higher relatively that the less relatively son SF1 of luminance weights carries out luminous probability.Therefore, a son SF9 and a son SF10 become do not send out photon field and a son SF1 to become the probability of sending out photon field higher relatively.

And, if becoming with a son SF10, a son SF9 do not send out photon field continuously, then Ti1 selects in the discharge cell of initialization action during the initialization of the son field of the initial beggar field as discrete cell SF1, do not produce the initialization discharge, based on above-mentioned reason, existence can not produce the possibility that writes discharge.

For this reason, in the present embodiment, the last son field in the initial beggar of discrete cell field, promptly, in during the keeping of 1 final son (in the present embodiment, being a son SF10), the maximum voltage of the up tilt waveform voltage that will produce in order to eliminate discharge be made as voltage Vr2.In addition, Vr2 is set at voltage: than in during the keeping of other sons (in the present embodiment, for each son of son SF1～son SF9) for the maximum voltage of eliminating the up tilt waveform voltage that produces of discharging, be the high voltage of voltage Vr1.

Thus, for example, do not send out photon field continuously even become with a son SF10 at son SF9, exist to produce among the ensuing son SF1 and write in the discharge cell of bad worry, also can make negative wall voltage counter-rotating residual on data electrode 32, in an ensuing son SF1, prevent to write bad generation.

That is,, can stably produce and write discharge even in each discharge cell, a plurality of fields are only carried out forcing for 1 time also preventing to write bad generation in the plasma display system 40 of initialization action.

As shown above, in the plasma display system 40 in the present embodiment, less relatively in luminance weights, and the son of selecting initialization action during initialization (in the present embodiment, for having luminance weights " 1 ", during initialization, carry out son the SF1 of discrete cell initialization action) tight before the relatively large son field of the luminance weights that produces (in the present embodiment, for having a son SF10 of luminance weights " 80 ") in, the maximum voltage of the up tilt waveform voltage that will produce in order to eliminate discharge, be voltage Vr2, be set at the maximum voltage of the up tilt waveform voltage of the elimination discharge usefulness that produces in the less relatively son field of specific luminance weight, be the also high voltage of voltage Vr1.

In other words, will be (in the present embodiment in a son last son field of organizing, be a son SF10) keep during among the Ts2 for the maximum voltage of eliminating the up tilt waveform voltage that discharge produces, be voltage Vr2, be set at than among the Ts1 during the keeping of other sons (in the present embodiment, for each son of son SF1～son SF9) for the maximum voltage of eliminating the up tilt waveform voltage that produces of discharging, be the also high voltage of voltage Vr1.

Thus, in plasma display system 40, can stably produce and write discharge, can on panel 10, show contrast height and the high image of image display quality.

In addition, based on above-mentioned reason, about applying the discharge cell of selecting waveform of initialization among the Ti1 (during the discrete cell initialization) during the initialization of a son SF1, will be during last the keeping of this child field SF1 Ts2 (for example, the maximum voltage of the up tilt waveform voltage that produces in order to eliminate discharge Ts2 during the keeping of son SF10) is made as voltage Vr2.But, about applying the discharge cell of forcing waveform of initialization among the Ti1 (during the discrete cell initialization) during the initialization of a son SF1, owing to produce the initialization discharge forcibly, so the maximum voltage of the up tilt waveform voltage that produces in order to eliminate discharge in Ts2 during last the keeping of this child field SF1 (for example, Ts2 during the keeping of son SF10) also can not be voltage Vr2.For example, the maximum voltage of this up tilt waveform voltage can be voltage Vr1.

The maximum voltage of the up tilt waveform voltage that will produce in order to eliminate discharge in addition, not wishing during the keeping of whole son be made as voltage Vr2.It is the reasons are as follows: if the maximum voltage of up tilt waveform voltage uprises, then eliminate action and become excessively, the wall electric charge in the guiding discharge unit is excessively eliminated.Therefore, be difficult to write discharge in during ensuing writing, the voltage of the driving voltage waveform during write activity is set the difficulty that becomes.

Next, the formation to the plasma display system in the present embodiment describes.In addition, in the following description, will make the action note of on-off element conducting do " connection ", the action that will end note be done " disconnection ".

Fig. 4 is the circuit block diagram of the plasma display system 40 in the embodiments of the present invention 1.

Plasma display system 40 possesses panel 10 and drives the driving circuit of panel 10.The power circuit (not shown) that driving circuit possesses imaging signal processing circuit 41, data electrode driver circuit 42, scan electrode driving circuit 43, keeps electrode drive circuit 44, timing generation circuit 45 and supply with the required power supply of each circuit module.

Imaging signal processing circuit 41 distributes gray-scale value based on the picture signal that is transfused to each discharge cell.And, with this gray-scale value, be transformed to luminous/non-luminous view data of each son field of expression.

For example, when the picture signal sig of input comprises R signal, G signal, B signal,, each discharge cell is distributed each gray-scale value (gray-scale value of performance in 1) of R, G, B based on this R signal, G signal, B signal.Perhaps, picture signal sig in input comprises luminance signal (Y-signal) and carrier chrominance signal (C signal, perhaps R-Y signal and B-Y signal, perhaps u signal and V signal etc.) time, calculate R signal, G signal, B signal based on this luminance signal and carrier chrominance signal, thereafter, each gray-scale value that each discharge cell is distributed R, G, B.And, will distribute to R, the G of each discharge cell, the gray-scale value of B, be transformed to luminous/non-luminous view data of each son field of expression.

Timing generation circuit 45 produces the various timing signals of the action of each circuit module of control based on horizontal-drive signal and vertical synchronizing signal.And, the timing signal that produces is offered each circuit module (imaging signal processing circuit 41, data electrode driver circuit 42, scan electrode driving circuit 43 and keep electrode drive circuit 44 etc.).

Scan electrode driving circuit 43 has that waveform of initialization produces circuit, keeps pulse-generating circuit, scanning impulse produces circuit (not shown).Waveform of initialization produces circuit and is created in during the initialization waveform of initialization to scan electrode SC1～scan electrode SCn applies.Keeping pulse-generating circuit is created in and keeps pulse to what scan electrode SC1～scan electrode SCn applied during keeping.Scanning impulse produces circuit and possesses a plurality of scan electrode drive IC (scans I C), is created in during writing the scanning impulse to scan electrode SC1～scan electrode SCn applies.Then, scan electrode driving circuit 43 is distinguished driven sweep electrode SC1～scan electrode SCn based on the timing signal of supplying with from timing generation circuit 45.

Data electrode driver circuit 42 is transformed to the write pulse corresponding with each data electrode D1～data electrode Dm with the data of each son field of composing images data.Then, based on the timing signal of supplying with from timing generation circuit 45, each data electrode D1～data electrode Dm applied write pulse.

Keep electrode drive circuit 44 and possess the circuit (not shown) of keeping pulse-generating circuit and producing voltage Ve, drive based on the timing signal of supplying with from timing generation circuit 45 and keep electrode SU1～keep electrode SUn.

Fig. 5 is the circuit diagram of formation that schematically shows the scan electrode driving circuit 43 of the plasma display system 40 in the embodiments of the present invention 1.

Scan electrode driving circuit 43 possesses the pulse-generating circuit of keeping 50, tilt waveform voltage generation circuit 60 and scanning impulse and produces circuit 70.In addition, each circuit module moves based on the timing signal of supplying with from timing generation circuit 45, but in Fig. 5, has omitted the detailed content in the path of timing signal.In addition, the voltage note that is input to scanning impulse generation circuit 70 is made " reference potential A ".

Keep pulse-generating circuit 50 and have power recovery circuit 51, on-off element Q55, on-off element Q56 and on-off element Q59.Power recovery circuit 51 has the capacitor that power recovery uses, a plurality of on-off element, a plurality of diode that adverse current uses, inductor that a plurality of resonance is used of preventing.

Power recovery circuit 51 makes the interelectrode capacitance of panel 10 and inductor carry out LC resonance and reclaim the electric power that is accumulated in the panel 10 from panel 10, and the electric power that reclaims is accumulated in the capacitor.Then, make the interelectrode capacitance of panel 10 and inductor carry out LC resonance, the electric power that reclaims is supplied to panel 10 once again from capacitor, and the electric power during as driven sweep electrode SC1～scan electrode SCn and utilizing again.

On-off element Q55 is clamped at voltage Vs with scan electrode SC1～scan electrode SCn, and on-off element Q56 is clamped at voltage 0 (V) with scan electrode SC1～scan electrode SCn.On-off element Q59 is a separating switch, prevents that electric current is via the parasitic diode of the on-off element that constitutes scan electrode driving circuit 43 etc. and adverse current.

So, keep the pulse of keeping that pulse-generating circuit 50 produces voltage Vs that scan electrode SC1～scan electrode SCn is applied.

Scanning impulse produce circuit 70 and have on-off element Q71H1～on-off element Q71Hn, on-off element Q71L1～on-off element Q71Ln, on-off element Q72, produce negative voltage Va power supply, produce the power supply E71 of voltage Vp.And reference potential A by scanning impulse being produced circuit 70 and voltage Vp superpose and produce voltage Vc (Vc=Va+Vp), impose on scan electrode SC1～scan electrode SCn in the time of switched voltage Va and voltage Vc, produce scanning impulse thus.For example, if voltage Va=-205 (V), voltage Vp=147 (V), then voltage Vc=-58 (V).

In addition, scanning impulse produces circuit 70 respectively to scan electrode SC1～scan electrode SCn each, applies scanning impulse successively with timing shown in Figure 3.In addition, scanning impulse produces circuit 70 and will keep the output voltage of pulse-generating circuit 50 directly export during keeping.That is, the voltage with reference potential A outputs to scan electrode SC1～scan electrode SCn.

Tilt waveform voltage generation circuit 60 possesses Miller integrating circuit 61, Miller integrating circuit 62, Miller integrating circuit 63, produces tilt waveform voltage shown in Figure 3.

Miller integrating circuit 61 has transistor Q61, capacitor C61 and resistance R 61.And, by input terminal IN61 being applied constant voltage (to providing constant voltage difference between illustrated 2 circles), thereby produce the up tilt waveform voltage that slowly rises towards voltage Vt as input terminal IN61.

In addition, in the present embodiment, voltage Vi2 is set equal to voltage Vt and voltage Vp stack and the voltage that obtains.Promptly, when making Miller integrating circuit 61 actions, on-off element Q72 and on-off element Q71L1～on-off element Q71Ln are disconnected, on-off element Q71H1～on-off element Q71Hn is connected, the voltage Vp of stack power supply E71 produces the up tilt waveform voltage of forcing waveform of initialization on the up tilt waveform voltage that is produced by Miller integrating circuit 61.

Miller integrating circuit 62 has transistor Q62, capacitor C62, resistance R 62 and prevents the diode Di62 that adverse current is used.And, by input terminal IN62 being applied constant voltage (to providing constant voltage difference between illustrated 2 circles), thereby produce the up tilt waveform voltage that slowly rises towards voltage Vr1 as input terminal IN62.

Miller integrating circuit 63 has transistor Q63, capacitor C63 and resistance R 63.And, by input terminal IN63 being applied constant voltage (to providing constant voltage difference between illustrated 2 circles), thereby produce the descending tilt waveform voltage that slowly descends towards voltage Vi4 as input terminal IN63.

In addition, on-off element Q69 is a separating switch, prevents that electric current is via the parasitic diode of the on-off element that constitutes scan electrode driving circuit 43 etc. and adverse current.

In addition, these on-off elements and transistor can adopt the general known semiconductor element of MOSFET, IGBT etc. to constitute.In addition, these on-off elements and transistor are by the timing signal control corresponding with each on-off element and transistor that produces in timing generation circuit 45.

Next, to the driving circuit in the present embodiment, mainly be that the action of scan electrode driving circuit 43 describes.

In the present embodiment, in driving voltage waveform shown in Figure 3, voltage Vi1 equals voltage Vp, and voltage Vi2 equals voltage (Vt+Vp), and voltage Vi3 equals voltage Vs, and voltage Vc equals voltage (Va+Vp).

But these voltages are not limited to above-mentioned numerical value, preferably suitably set according to the characteristic of panel 10, the specification of plasma display system etc.

Fig. 6 is the time diagram of action of driving circuit that is used for illustrating the plasma display system 40 of embodiments of the present invention 1.

In addition, in Fig. 6, during initialization, among the Ti1, force the scan electrode 22 of waveform of initialization to be made as scan electrode SC1, select the scan electrode 22 of waveform of initialization to be made as scan electrode SC2 applying with applying.

In addition, in Fig. 6, on-off element corresponding with scan electrode SC1 among on-off element Q71H1～on-off element Q71Hn is made as on-off element Q71H1, the on-off element corresponding with scan electrode SC1 is made as on-off element Q71H1.Equally, on-off element corresponding with scan electrode SC1 among on-off element Q71L1～on-off element Q71Ln is made as on-off element Q71L1, the on-off element corresponding with scan electrode SC1 is made as on-off element Q71L1.

In addition, in driving voltage waveform shown in Figure 6, maximum voltage is made as the waveform shape of the up tilt waveform voltage of voltage Vr2, different with the waveform shape of the up tilt waveform voltage that maximum voltage is made as voltage Vr2 shown in Figure 3.But, in the present embodiment, no matter be which kind of up tilt waveform voltage, can both obtain effect same as described above.

For example because of the problem on the formation of circuit etc., exist to be difficult to produce as shown in Figure 3 from voltage 0 (V) to voltage Vr2 with the up tilt waveform voltage condition of constant gradient increase.Even Fig. 6 shows the example that also can obtain the up tilt waveform voltage of effect same as described above under these circumstances.

The first half of Ti1 during the initialization of a son SF1, at first the on-off element Q56 with scan electrode driving circuit 43 connects, and scan electrode SC1, scan electrode SC1 are applied voltage 0 (V).

Next, on-off element Q56 is disconnected, and for applying the scan electrode SC1 that forces waveform of initialization, on-off element Q71L1 is disconnected, on-off element Q71H1 is connected, apply voltage Vp.On the other hand,, apply the scan electrode SC2 that selects waveform of initialization, keep applying voltage 0 (V) for not forcing initialization action.

Next, the input terminal IN61 of Miller integrating circuit 61 is applied constant voltage, make the voltage of reference potential A slowly rise to voltage Vt.Because to applying the scan electrode SC1 that forces waveform of initialization, be applied to the voltage behind the voltage Vp that superposeed on the reference potential A, so can apply the up tilt waveform voltage that slowly rises to voltage (Vt+Vp) from voltage Vp to this scan electrode SC1.

On the other hand, owing to do not force the scan electrode SC2 of waveform of initialization to apply reference potential A to applying, so can apply the up tilt waveform voltage that slowly rises to voltage Vt from voltage 0 (V) to this scan electrode SC2.

Ti1's is latter half of during the initialization of an ensuing son SF1, the on-off element Q71H1 of scan electrode driving circuit 43 is disconnected, on-off element Q71L1 is connected, and on-off element Q55 and on-off element Q59 are connected, scan electrode SC1, scan electrode SC2 are applied voltage Vs.

Thereafter, on-off element Q69 disconnected and the input terminal IN63 of Miller integrating circuit 63 is applied constant voltage, make Miller integrating circuit 63 actions, scan electrode SC1, scan electrode SC2 are applied the descending tilt waveform voltage that slowly drops to voltage Vi4 from voltage Vs.

During the writing of son SF1 among the Tw, the transistor Q63 of the Miller integrating circuit 63 of scan electrode driving circuit 43 is disconnected, on-off element Q72 is connected, the voltage of reference potential A is made as voltage Va.And, on-off element Q71L1 and on-off element Q71L2 are disconnected, on-off element Q71H1 and on-off element Q71H2 are connected, scan electrode SC1 and scan electrode SC2 are applied voltage (Va+Vp), are voltage Vc.

Next, on-off element Q71H1 is disconnected, on-off element Q71L1 is connected, scan electrode SC1 is applied the scanning impulse that changes to voltage Va from voltage Vc.

(write activity of the 1st row finishes the back) connects on-off element Q71H1 after the constant time, and on-off element Q71L1 is disconnected, and will turn back to voltage Vc to the voltage that applies of scan electrode SC1.So, scan electrode SC1 is applied scanning impulse.

Next, on-off element Q71H2 is disconnected, on-off element Q71L2 is connected, scan electrode SC2 is applied the scanning impulse that is changed to voltage Va from voltage Vc.

(write activity of the 2nd row finishes the back) connects on-off element Q71H2 after the constant time, and on-off element Q71L2 is disconnected, and will turn back to voltage Vc to the voltage that applies of scan electrode SC2.So, scan electrode SC2 is applied scanning impulse.

Below same, until scan electrode SCn, scanning impulse is imposed on scan electrode 22 successively.

Thereafter, respectively on-off element Q72, on-off element Q71H1, on-off element Q71H2 are disconnected, respectively on-off element Q56, on-off element Q69, on-off element Q71L1, on-off element Q71L2 are connected, scan electrode SC1, scan electrode SC2 are applied voltage 0 (V).So, finish during writing.

Ts1 during the keeping of son SF1, that utilizes scan electrode driving circuit 43 keeps pulse-generating circuit 50, to scan electrode SC1～scan electrode SCn, applies and the corresponding number of sustain pulses of luminance weights.

And, after whole in during having produced this and keeping keep pulse, the on-off element Q56 of scan electrode driving circuit 43 is disconnected.Meanwhile, the input terminal IN62 of Miller integrating circuit 62 is applied constant voltage make Miller integrating circuit 62 actions, scan electrode SC1～scan electrode SCn is applied the up tilt waveform voltage that slowly rises to voltage Vr1.In addition, this voltage Vr1 is the voltage (for example, voltage Vr1=voltage Vs-12 (V)) lower than voltage Vs.

Ti2 during the initialization of a son SF2, under the state of the on-off element Q71L1 of scan electrode driving circuit 43～on-off element Q71Ln being connected, on-off element Q71H1～on-off element Q71Hn being disconnected, the input terminal IN63 of Miller integrating circuit 63 is applied constant voltage.Make Miller integrating circuit 63 actions like this,, apply the descending tilt waveform voltage that slowly drops to voltage Vi4 scan electrode SC1～scan electrode SCn.

Ts2 during the keeping of son SF10, that utilizes scan electrode driving circuit 43 keeps pulse-generating circuit 50, to scan electrode SC1～scan electrode SCn, applies and the corresponding number of sustain pulses of luminance weights.

And, after whole in during having produced this and keeping keep pulse, the on-off element Q56 of scan electrode driving circuit 43 is disconnected.Meanwhile, the input terminal IN62 of Miller integrating circuit 62 is applied constant voltage make Miller integrating circuit 62 actions,, apply the up tilt waveform voltage that slowly rises to voltage Vr1 scan electrode SC1～scan electrode SCn.In addition, this voltage Vr1 is the voltage (for example, voltage Vr1=voltage Vs-12 (V)) that is lower than voltage Vs.

Then, on-off element Q56 connection is applied voltage 0 (V) to scan electrode SC1～scan electrode SCn.On-off element Q56 disconnected thereafter.

Next, on-off element Q71L1～on-off element Q71Ln is disconnected, on-off element Q71H1～on-off element Q71Hn is connected, scan electrode SC1～scan electrode SCn is applied voltage Vp.

Then, the input terminal IN62 of Miller integrating circuit 62 is applied constant voltage and make Miller integrating circuit 62 actions.Thus, scan electrode SC1～scan electrode SCn is applied the up tilt waveform voltage that slowly rises from voltage Vp.

Then, scan electrode SC1～voltage that scan electrode SCn applies is reached the moment of voltage Vr2, the voltage of the input terminal IN62 of Miller integrating circuit 62 is disconnected, stopping the action of Miller integrating circuit 62.

So, scan electrode SC1～scan electrode SCn is applied with the up tilt waveform voltage that is raised to the voltage Vr2 higher than voltage Vr1.

, on-off element Q71H1～on-off element Q71Hn disconnected, on-off element Q71L1～on-off element Q71Ln is connected thereafter.

So, in the present embodiment, utilize data electrode driver circuit 42, scan electrode driving circuit 43 and keep electrode drive circuit 44 to produce driving voltage waveform shown in Figure 3, impose on data electrode D1～data electrode Dm, scan electrode SC1～scan electrode SCn respectively and keep electrode SU1～keep electrode SUn.

That is, during keeping in, produce the corresponding number of sustain pulses of luminance weights with regulation, and it alternately imposed on scan electrode 22 and keeps electrode 23.

In the son field except final son field (in the present embodiment, during the keeping each the son field for son SF1～son SF9) among the Ts1, produced keep during in last keep pulse after, produce and rise to the up tilt waveform voltage of voltage Vr1 and impose on scan electrode 22.

Then, be 1 final son and luminance weights maximum son (in the present embodiment, be a son SF10) keep during among the Ts2, produced keep during in last keep pulse after, at first produce to rise to the up tilt waveform voltage of voltage Vr1 and impose on scan electrode 22 and apply.After up tilt waveform voltage reaches voltage Vr1, will temporarily turn back to voltage 0 (V) to the voltage that applies of scan electrode 22.Thereafter, positive voltage (for example, voltage Vp) is imposed on scan electrode 22, generation rises to the up tilt waveform voltage of voltage Vr2 and imposes on scan electrode 22 from this positive voltage.

If for example because of the problem on the formation of circuit etc., make and be difficult to produce the up tilt waveform voltage that increases with constant gradient from voltage 0 (V) to voltage Vr2 as shown in Figure 3, then also can be as shown in Figure 6, voltage rise from voltage 0 (V) to voltage Vr2 during, temporarily drop to the such waveform shape of 0 (V) with the voltage that applies, produce up tilt waveform voltage scan electrode 22.Even under these circumstances, also can obtain effect same as described above.

As implied above, in the present embodiment, each discharge cell only carries out 1 time in continuous a plurality of (for example, continuous in the present embodiment 2 fields) forces initialization action.Thus, in plasma display system 40, with 1 constituent ratio of carrying out forcing for 1 time initialization action, can reduce the generation frequency of forcing initialization action, reduction shows have nothing to do luminous with gray scale, reduces the shiny black degree in the display image, can the high image demonstration of degree of comparing.

In addition, in the present embodiment, be 1 final son and luminance weights maximum son (in the present embodiment, be a son SF10) keep during among the Ts2, the maximum voltage of the up tilt waveform voltage that will produce in order to eliminate discharge is made as voltage Vr2, be made as voltage Vr1 for the maximum voltage of eliminating the up tilt waveform voltage that produces of discharging in will be during the keeping of other sons (in the present embodiment, for each son of son SF1～son SF9).And, voltage Vr2 is made as the voltage higher than voltage Vr1.

Thus, even in continuous a plurality of, only carry out forcing for 1 time a son formation of initialization action, also can stably produce and write discharge.

Promptly, in each discharge cell, when driving panel 10 by the driving method that only carries out 1 pressure initialization action in continuous a plurality of fields, even 2 last son fields of 1 (for example, a son SF9 and a son SF10) be not send out photon field continuously, also can during the initialization of the son field of initial beggar field SF1, select in the discharge cell of initialization action by Ti1, stably produce and write discharge as discrete cell.

In addition, in the present embodiment, (an a son SF1～son SF10) constitutes 1 by 10 sons, and goes up the big more mode of sub-field brightness weight that the back produces according to time each son has been set luminance weights.Therefore, if will be the time go up the big more so continuous in time a plurality of sons field of sub-field brightness weight that the back produces and be made as 1 son group, then in the present embodiment, field, 1 ground can be regarded as 1 son group that 10 sub-places by SF1～son SF10 constitute.Therefore, son field SF10 also can be the final son field of 1 son group.

(embodiment 2)

In embodiment 1, to in each discharge cell, when driving panel 10 by the driving method that in continuous a plurality of, only carries out 1 pressure initialization action, even 2 last son fields of 1 (for example, a son SF9 and a son SF10) be not send out photon field continuously, Ti1 selects in the discharge cell of initialization action during the initialization of the son field of the initial beggar field as discrete cell SF1, is used for stably producing the driving voltage waveform that writes discharge and is illustrated.

But the present invention at all is not limited to this formation.The present invention is so long as the big son field of luminance weights produces the little son field of luminance weights after producing continuously, and not producing the such son field of initialization discharge in the little son field of this luminance weights constitutes, by formation same as described above, just can obtain effect same as described above.

In such son constitutes, except the son shown in the embodiment 1 constitutes, for example also exist following son to constitute: to carry out suppressing flicker by every means when image shows at panel 10 in the picture signal by the PAL mode.

In the present embodiment, in the son formation that suppresses flicker of carrying out on panel 10 by the picture signal of PAL mode trying every means when image shows, the example that is suitable for the formation shown in the embodiment 1 describes.

In addition, in the present embodiment, the formation of plasma display system is identical with the formation of the plasma display system 40 shown in the embodiment 1, so omit explanation.

In the present embodiment, the formation of son field is different from the formation of the son field shown in the embodiment 1.

In the present embodiment, to constituting 1 by 14 sons (an a son SF1～son SF14), the example that each son field has the luminance weights of (1,2,4,8,20,32,56,4,12,16,16,20,32,32) respectively describes.

Like this, in the present embodiment, constitute 1 a plurality of son, luminance weights increases when a son SF1～son SF7, and a SF8 luminance weights temporarily diminishes from a son SF7 to son, increases once again to a son field SF14 luminance weights from a son SF8.

Therefore, if the big more so continuous in time a plurality of sons field of the sub-field brightness weight of back generation in time is made as 1 son field group, then in the present embodiment, the son group that constitutes of 17 sub-place that can be regarded as by son SF1～son SF7, these 2 sons of a son group that 7 sub-places from a son SF8 to a son SF14 constitute are organized and to be constituted.

The picture signal of the like PAL mode of son configuration example like this is such, is effective in the generation that field frequencies range (quantity of the field that produces in 1 second) is suppressed flicker (flicker of image) when low picture signal is shown in panel 10.

Fig. 7 is the figure of the driving voltage waveform that applies of each electrode of the panel that uses in the plasma display system of expression in the embodiments of the present invention 2.

In Fig. 7, represent, respectively to carry out the scan electrode SC1 of write activity at first in during writing, during writing in the 2nd scan electrode SC2 that carries out write activity, keep electrode SU1～keep electrode SUn and driving voltage waveform that data electrode D1～data electrode Dm applies.

In addition, in Fig. 7, be illustrated in during the initialization driving voltage waveform to different 2 sons of the waveform shape of scan electrode SC1～driving voltage that scan electrode SCn applies.These 2 sub is meant the later sub-field of a sub SF2 of selecting initial beggar field as the son field SF1 and the conduct of whole initial beggar fields, unit.

All initial beggar field, unit is meant, during initialization whole scan electrode SC1～scan electrode SCn is applied the pressure waveform of initialization, produces the son field of initialization discharge cell at whole discharge cell of the image display area that is arranged in panel 10.Below, do " all during the unit initialization " with also remembering during the initialization of initial beggar field, whole unit.

In addition, the generation of keeping pulse of the driving voltage waveform in the later son of son SF3 in during keeping counted the difference, with the driving voltage waveform of a son SF2 much at one.

But about son SF7, it is different that being used to produce of the waveform shape that is used for producing the up tilt waveform voltage of eliminating discharge and other sons eliminated the up tilt waveform voltage that discharges.

At first, the son SF1 as whole initial beggar fields, unit is described.

During the initialization of a son SF1, among the Ti1, whole scan electrode SC1～scan electrode SCn is applied the pressure waveform of initialization shown in the embodiment 1.

That is, the first half of Ti1 during initialization is to data electrode D1～data electrode Dm, keep electrode SU1～keep electrode SUn to apply voltage 0 (V) respectively.Scan electrode SC1～scan electrode SCn is applied voltage Vi1.Voltage Vi1 is with respect to keeping electrode SU1～keep electrode SUn and be set at the voltage that is lower than discharge ionization voltage.

And,, apply the up tilt waveform voltage that slowly rises from voltage Vi1 towards voltage Vi2 to scan electrode SC1～scan electrode SCn.

During this up tilt waveform voltage rising, scan electrode SC1～scan electrode SCn and keep electrode SU1～keep between the electrode SUn and scan electrode SC1～scan electrode SCn and data electrode D1～data electrode Dm between, produce faint initialization discharge respectively constantly.Then, on scan electrode SC1～scan electrode SCn, accumulate negative wall voltage, on data electrode D1～data electrode Dm and keep electrode SU1～keep and accumulate positive wall voltage on the electrode SUn.And also generation helps to produce the initiation particle of later discharge.

Ti1's is latter half of during initialization, to keeping electrode SU1～keep electrode SUn to apply positive voltage Ve, data electrode D1～data electrode Dm is applied the 1st voltage voltage 0 (V).Scan electrode SC1～scan electrode SCn is applied the descending tilt waveform voltage that slowly descends towards negative voltage Vi4 from voltage Vi3.

Voltage Vi3 is with respect to keeping electrode SU1～keep electrode SUn and be set at the voltage that is lower than discharge ionization voltage, and voltage Vi4 is set to the voltage above discharge ionization voltage.

Scan electrode SC1～scan electrode SCn is applied descending tilt waveform voltage during, scan electrode SC1～scan electrode SCn and keep electrode SU1～keep between the electrode SUn and scan electrode SC1～scan electrode SCn and data electrode D1～data electrode Dm between, produce faint initialization discharge respectively.

Then, negative wall voltage on scan electrode SC1～scan electrode SCn and the positive wall voltage of keeping electrode SU1～keep on the electrode SUn are weakened, and the positive wall voltage on data electrode D1～data electrode Dm is adjusted to the value that is suitable for write activity.And also generation helps to produce the initiation particle of later discharge.

By above-mentioned, the whole unit initialization action that produces the initialization discharge in whole discharge cells finishes.

During the writing of son SF1 among the Tw, to each electrode apply with writing shown in the embodiment 1 during the identical driving voltage waveform of Tw.That is, scan electrode SC1～scan electrode SCn is applied scanning impulse successively, and the data electrode Dk corresponding with luminous discharge cell applied the pulse that writes of voltage Vd.So, answer luminous discharge cell generation to write discharge, forming the ensuing required wall electric charge of discharge of keeping.

Ts1 during the keeping of son SF1, to each electrode apply with keeping shown in the embodiment 1 during the identical driving voltage waveform of Ts1.Promptly, produce and the corresponding number of sustain pulses of luminance weights, and it is alternately imposed on scan electrode SC1～scan electrode SCn and keep electrode SU1～keep electrode SUn, causing the discharge cell that writes discharge, produce the discharge of keeping with the corresponding number of times of luminance weights.

Then, having produced after last among the Ts1 keep pulse during keeping, produce and rise to the up tilt waveform voltage of voltage Vr1, and impose on scan electrode SC1～scan electrode SCn from voltage 0 (V).Thus, produce in having produced the discharge cell of keeping discharge and eliminate discharge, wall voltage on the scan electrode SCi and the wall voltage of keeping on the electrode SUi are weakened.

During the initialization of a son SF2, among the Ti2, the selection waveform of initialization shown in the embodiment 1 is imposed on whole scan electrode SC1～scan electrode SCn.

That is, Ti2 during initialization applies voltage 0 (V) to data electrode D1～data electrode Dm, to keeping electrode SU1～keep electrode SUn to apply voltage Ve.Then, to scan electrode SC1～scan electrode SCn, apply the descending tilt waveform voltage that slowly descends from the voltage Vi3 ' that the is lower than discharge ionization voltage voltage 0 (V) of reference potential (for example, as) towards the negative voltage Vi4 that surpasses discharge ionization voltage.

Thus, produced in the discharge cell of keeping discharge in during the keeping of last son (among Fig. 7, being a son SF1), has produced faint initialization and discharge.Then, the wall voltage that scan electrode SCi goes up and keeps on the electrode SUi is weakened, and the wall voltage on the data electrode Dk also is adjusted to the value that is suitable for write activity.

On the other hand, not have to produce in during the keeping of last son and do not produce the initialization discharge in the discharge cell of keeping discharge, the wall electric charge when keeping end during the initialization of last son field.So the initialization action among the son SF2 finishes.

Like this, produce during the initialization action among son the SF2 only becomes during the writing of last son write discharge and keeping during in produced and produced the selection initialization action that initialization is discharged in the discharge cell of keeping discharge.

During the writing of son SF2 Tw and keep during Ts1, except the generation number of keeping pulse, to each electrode apply with the writing of son field SF1 during and keep during identical driving voltage waveform.

Among each sub, the quantity of keeping pulse that during keeping, produces among the Ts1, each electrode is applied and a son identical driving voltage waveform of SF2 from a son SF3 to a son SF6.

During as the initialization of the son SF7 of the final son of the 1st a son group Ti2 and write during Tw, each electrode is applied the identical driving voltage waveform with son field SF2.In addition, during the keeping of son SF7 among the Ts2, except the generation number of keeping pulse, to show electrode to 24 alternately apply with the keeping of a son SF2 during among the Ts1 keep pulsion phase with keep pulse.

But the up tilt waveform voltage of the elimination discharge usefulness that produces among the Ts2 during the keeping of son SF7 is compared the waveform shape difference with the up tilt waveform voltage of the elimination discharge usefulness that produces among the Ts1 during the keeping of a son SF2.

Ts2 during the keeping of son SF7 after the last generation of keeping pulse during keeping among the Ts2, produces and slowly rises to the up tilt waveform voltage of voltage Vr2 and impose on scan electrode SC1～scan electrode SCn from voltage 0 (V).And, voltage Vr2 is set at the voltage that is higher than voltage Vr1.

Each son field, the quantity of keeping pulse that during keeping, produces among the Ts1, each electrode is applied and a son identical driving voltage waveform of SF2 from a sub SF8 to a son SF14 as the 2nd a son group.

In such son field formation, during the initialization of the sub-field SF8 of the sub-field of beginning of sub-field group as the 2nd, among the Ti1, select initialization action.

In addition, in the 1st a son group, go up the big more mode of sub-field brightness weight that the back produces according to time, luminance weights has been set in each son field.

Therefore, the last son field of a son SF8 is the final son field of the 1st sub group, is sub of luminance weights maximum in this child field group.

As mentioned above, when general dynamic image was shown in panel 10, it was high more to have confirmed that luminous probability is carried out in son field that luminance weights is little, and it is low more that luminous probability is carried out in the son field that luminance weights is big.

Therefore, if the son of representing as 1 example constitutes in the present embodiment, it is relatively low that then a relatively large son SF6 of luminance weights and a son SF7 carry out luminous probability, and it is higher relatively that the son SF8 that luminance weights is little carries out luminous probability.Therefore, a son SF6 and a son SF7 become do not send out photon field, that a son SF8 becomes the probability of sending out photon field is higher relatively.

Then, if a son SF6 does not send out photon field continuously with a son SF7, then as not producing the initialization discharge among the Ti2 during the initialization of a son SF8 who selects initial beggar field, based on above-mentioned reason, existence can not produce the possibility that writes discharge.

For this reason, in the present embodiment, select during the less relatively and initialization in luminance weights in the relatively large son field of the luminance weights that produces before son tight of initialization action, the maximum voltage of the up tilt waveform voltage that will produce, be voltage Vr2, be set at maximum voltage, be the also high voltage of voltage Vr1 than the up tilt waveform voltage of the elimination discharge usefulness that in the less relatively son of luminance weights, produces in order to eliminate discharge.

In the present embodiment, above-mentioned, luminance weights is less relatively and be a son SF8 who has luminance weights " 4 " and select initialization action during initialization at the son of selecting initialization action during the initialization.In addition, the above-mentioned relatively large son field of luminance weights is the son SF7 with luminance weights " 56 ".

In other words, in the present embodiment, in the last son field of the 2nd a son group, promptly, in during the keeping of the final son of the 1st a son group (in the present embodiment, being a son SF7), the maximum voltage of the up tilt waveform voltage that will produce in order to eliminate discharge be made as voltage Vr2.Then, with voltage Vr2, be set at than in during the keeping of other sons (in the present embodiment, being son SF1～son SF6 and a son SF8 each son field) to a son SF14 for the maximum voltage of eliminating the up tilt waveform voltage that produces of discharging, be the also high voltage of voltage Vr1.

Thus, even for example at son SF6 and a son SF7 for not sending out photon field continuously, exist to produce among the ensuing son SF8 and write in the discharge cell of bad worry, also can make negative wall voltage counter-rotating residual on the data electrode 32, in an ensuing son SF8, can prevent to write bad generation.

In addition, in Fig. 7, illustrated in a last son SF7 of the 1st a son group and produced the formation that maximum voltage is made as the up tilt waveform voltage of voltage Vr2.But the present invention is not limited to this formation.For example, also can in a last son SF14 of the 2nd a son group, also produce the up tilt waveform voltage that maximum voltage is made as voltage Vr2.This is effective especially in a son formation that a son SF1 is made as the initial beggar of discrete cell field in order only to carry out 1 pressure initialization action in continuous a plurality of fields.

In addition, among the present invention, constitute the quantity of 1 son field, the son field that is made as the initial beggar of pressure field, each son luminance weights that has etc. and be not limited to above-mentioned numerical value.In addition, also can be based on picture signal etc. and switch a son structure that constitutes.

In addition, Fig. 3, Fig. 6, driving voltage waveform shown in Figure 7 have only been represented 1 example in the embodiments of the present invention, and the present invention at all is not limited to this driving voltage waveform.

In addition, the formation of Fig. 4, driving circuit shown in Figure 5 has only been represented 1 example in the embodiments of the present invention, and the present invention at all is not limited to these circuit and constitutes.

In addition, each circuit module shown in the embodiment among the present invention also can constitute the circuit of each action of carrying out shown in the embodiment, perhaps, also can adopt the microcomputer that carries out program design according to the mode of carrying out identical action to wait and constitute.

In addition, in the embodiment in the present invention, to being illustrated by 10 son fields or 14 sub examples that constitute 1 field.But among the present invention, the quantity that constitutes 1 son field at all is not limited to above-mentioned quantity.For example, be provided with manyly by quantity, thereby can further increase the quantity of the gray scale that can be shown in panel 10 the son field.Perhaps, be provided with still less by quantity, thereby can shorten the required time of driving of panel 10 the son field.

In addition, in embodiments of the present invention, the example that constitutes 1 pixel by discharge cell red, green, blue 3 looks is illustrated, even but constitute in the panel of 1 pixel at discharge cell by 4 looks or the color more than 4 looks, also can be suitable for the formation shown in the embodiment among the present invention, can obtain identical effect.

In addition, the concrete numerical value shown in the embodiments of the present invention is be 50 inches, show electrode to 24 quantity according to picture dimension is that the characteristic of 1024 panel 10 is set, and has only represented 1 example in the embodiment.The present invention at all is not limited to these numerical value, and each numerical value is preferably set best according to specification or the characteristic of panel and the specification of plasma display system etc. of panel.In addition, these each numerical value allow the deviation in the scope that can obtain above-mentioned effect.In addition, the luminance weights etc. that constitutes 1 the quantity of son or each son is not limited to the value shown in the embodiment among the present invention, in addition, also can be based on picture signal and wait and switch a son structure that constitutes.

Industrial applicibility

The present invention also can carry out stable write activity when the panel of the big picture that drives high-finenessization, can be shown on the panel by the image that quality is high, and be useful as the driving method and the plasma display system of panel.

-symbol description-

10 panels

21 front substrates

22 scan electrodes

23 keep electrode

24 show electrodes are right

25,33 dielectric layers

26 protective seams

31 back substrates

32 data electrodes

34 next doors

35 luminescent coatings

40 plasma display systems

41 imaging signal processing circuits

42 data electrode driver circuits

43 scan electrode driving circuits

44 keep electrode drive circuit

45 timing generation circuits

50 keep pulse-generating circuit

51 power recovery circuits

60 tilt waveform voltage generation circuits

61,62,63 Miller integrating circuits

70 scanning impulses produce circuit

The Di62 diode

Q55, Q56, Q59, Q69, Q72, Q71H1～Q71Hn, Q71L1～Q71Ln on-off element

C61, C62, C63 capacitor

R61, R62, R63 resistance

Q61, Q62, Q63 transistor

IN61, IN62, IN63 input terminal

The E71 power supply

During Ti1, the Ti2 initialization

During Tw writes

During Ts1, Ts2 keep

Claims

1. the driving method of a Plasmia indicating panel, in 1, be equipped with the son field and drive Plasmia indicating panel, above-mentioned Plasmia indicating panel possesses a plurality of discharge cells, each discharge cell have by scan electrode and keep show electrode that electrode constitutes to and data electrode, above-mentioned son field have carry out above-mentioned scan electrode applied the initialization of selection initialization action of the descending tilt waveform voltage that descends towards negative voltage during, during writing, with to above-mentioned show electrode to apply with the keeping of the corresponding number of sustain pulses of luminance weights during, wherein

After last in during above-mentioned keeping kept pulse and produced, above-mentioned scan electrode applied be used for producing the up tilt waveform voltage of eliminating discharge at above-mentioned discharge cell,

Less relatively and during above-mentioned initialization, carry out in the relatively large son of the luminance weights that produces before son tight of above-mentioned selection initialization action in luminance weights, the maximum voltage of above-mentioned up tilt waveform voltage is set at the also high voltage of maximum voltage than the above-mentioned up tilt waveform voltage of generation in the less relatively son of above-mentioned luminance weights.

2. the driving method of Plasmia indicating panel according to claim 1 is characterized in that,

Be provided with during the discrete cell initialization, mix the selection system initialization action that existence is applied with the pressure initialization action of line tilt waveform voltage and above-mentioned descending tilt waveform voltage to above-mentioned scan electrode and above-mentioned scan electrode is applied above-mentioned descending tilt waveform voltage in during this discrete cell initialization

Be made as during the above-mentioned discrete cell initialization during the initialization of the son field that above-mentioned luminance weights is less relatively.

3. the driving method of Plasmia indicating panel according to claim 1 is characterized in that,

The continuous relatively large son of the above-mentioned luminance weights relative less son field that produces in same with above-mentioned luminance weights.

4. the driving method of Plasmia indicating panel according to claim 1 is characterized in that,

By before the voltage that above-mentioned scan electrode is applied rises to maximum voltage, the voltage that above-mentioned scan electrode is applied is temporarily descended, and the voltage that above-mentioned scan electrode is applied is risen, produce above-mentioned up tilt waveform voltage.

5. plasma display system, it possesses:

Plasmia indicating panel, it possesses a plurality of discharge cells, each discharge cell have by scan electrode and keep show electrode that electrode constitutes to and data electrode; With

Driving circuit, it is equipped with the son field and drives above-mentioned Plasmia indicating panel in 1, above-mentioned son field have carry out above-mentioned scan electrode applied the initialization of selection initialization action of the descending tilt waveform voltage that descends towards negative voltage during, write during and to above-mentioned show electrode to apply with the keeping of the corresponding number of sustain pulses of luminance weights during

Above-mentioned driving circuit,

6. plasma display system according to claim 5 is characterized in that,

Above-mentioned driving circuit,

7. plasma display system according to claim 5 is characterized in that,

Above-mentioned driving circuit,

8. plasma display system according to claim 5 is characterized in that,

Above-mentioned driving circuit,