CN101271662B - Driving method of grooved plasma body metal net plate electrode during initialization - Google Patents
Driving method of grooved plasma body metal net plate electrode during initialization Download PDFInfo
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- CN101271662B CN101271662B CN2008100237505A CN200810023750A CN101271662B CN 101271662 B CN101271662 B CN 101271662B CN 2008100237505 A CN2008100237505 A CN 2008100237505A CN 200810023750 A CN200810023750 A CN 200810023750A CN 101271662 B CN101271662 B CN 101271662B
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Abstract
The invention relates to a drive method of an electrode of a groove type plasma metal screen plate during initializing period; when a groove type plasma scanning electrode comes into the initializing period, a drive circuit exerts a voltage controlled waveform on the electrode of the metal screen plate so as to guarantee that the electrode of the metal screen plate does not produce a weak discharging process against the scanning electrode and an addressing electrode during the weak discharging process produced between the scanning electrode and the addressing electrode in a first half of the initializing period; and in the first part and the rear part of the initializing period, the constant voltage controlled waveform exerted by the drive circuit on electrode of the metal screen plate is utilized to lead the scanning electrode and the electrode of the metal screen plate to generate the weak discharge; a positive wall charge on the surface of a dielectric layer on the addressing electrode is kept unchanged so as to guarantee that the positive wall charge accumulated on the surface of the dielectric layer on the addressing electrode approximates to the positive wall charge starting up a voltage level, thereby being helpful to improve the addressing speed, reduce the luminance of back side, improve the consistency of the addressing of the entire screen, reduce the occurrence of a wrong discharging and increase the contrast ratio of a SMPDP greatly.
Description
Technical field
The present invention relates to be applied to the slot type plasma display drive method.The specifically a kind of driving method that can avoid mis-ignition, improve a kind of groove type plasma display panel of contrast.
Background technology
The plasma panel display (PDP) that early 1990s rises, with its digitizing, giant-screen, high resolving power, high definition, wide visual angle and thin thickness, advantage such as in light weight is subjected to extensive concern.
Groove type plasma display panel (SMPDP) is faster a kind of new display spare of development in recent years, what adopt is two electrode structures, be respectively the scan electrode (SCN electrode) on the prebasal plate, the interchange of the addressing electrode on the metacoxal plate (D electrode) is to the phase discharge pattern.In the driving process of groove type plasma display panel, SCN electrode and D electrode quadrature.For the SMPDP that solves under the bipolar electrode structure can normally show, the inventor invents and has proposed a kind of bipolar energy recovering and keeps drive unit (the open No of Chinese patent application.200410014442.8), in the phase of keeping, only on the SCN electrode, add the positive and negative high pressure that replaces and make address period gather the unit generation discharge of enough wall electric charges, thereby realize that image shows.In order to solve the asymmetric problem of discharge, the inventor invents and has proposed asymmetric pulse driving circuit and driving method (the open No of Chinese patent application thereof of keeping of a kind of bipolarity.200610038283.4), be under the suspended state during this shows at metal otter board electrode in the groove type plasma display panel always, and cause because the difference of video data, in addressing period, induced potential on the metal otter board electrode will have greatly changed, to the bigger influence of wall charge generation of all unit of display screen in during the initialization in the eraser, cause the instability and the heterogeneity of wall electric charge, produce the mis-ignition phenomenon.Have a strong impact on the problem of the image displaying quality of groove type plasma display panel, the inventor invents and has proposed a kind of three-electrode driving method of slot plasm display plate (open No of Chinese patent application.200710025095.2), to being in metal otter board electrode under the suspended state originally at address period Loading Control signal.By this control signal be controlled at initialization during, the phase of keeping still keeps metal otter board to be in work under the suspended state, and in address period, by to applying a voltage signal on the metal otter board, produce a metastable electric field, make all discharge cells be in stable critical discharge condition in during the initialization of maintenance discharge cell in erasing period, make full frame after finishing during the initialization, how the discharge condition of each unit does not guarantee that the unit of not lighted a fire is not subjected to be lighted a fire to carry out the influence of discharge cell in the pipe yard.
In above-mentioned driving method, because metal otter board is worked still being under the suspended state during the initialization, make when each end, because the influence of factors such as illuminating state, sometimes it is clean to fail a wall charge erasure, at part and the oblique wave sloping portion that initialization pulse voltage sharply descends, fails to wipe those clean discharge cells for those wall electric charges, non-expectation discharge will take place, and promptly misplaces.And, in the unit that electricity was taking place to misplace for the first time, also can take place in frequent succession for the second time, chain misplacing for the third time.This electricity that misplaces, can play with initialization during after write the same effect of discharge with data that address period takes place, therefore, in this case, will bring out misplacing during keeping.Promptly there is not the discharge of keeping that discharge cell that data write takes place.Though this electricity that misplaces is not every and all can takes place that it is different from the weak discharge that takes place usually during the initialization, human eye is easy to identification, so it is the major reason that picture quality degenerates.Need a kind of method that addresses these problems.
Simultaneously owing to be under the suspended state at metal otter board during the initialization, make the potential change of metal otter board during whole initialization change along with the variation on the scan electrode, and between this induced potential on the metal otter board electrode and the voltage of scan electrode and all can form voltage difference between the addressing electrode, when the potential difference (PD) when between the two reaches sparking voltage, just can form and misplace, make the darkroom brightness of entire display panel increase, thereby make SMPDP complete machine contrast descend, therefore, need a kind of method that addresses these problems.
In addition since metal otter board work being in during the initialization under the suspended state, make and weaken the positive wall electric charge that scan electrode accumulates on the negative wall electric charge that accumulates that is produced by initialization pulse during the initialization and addressing electrode upper dielectric layer surface on dielectric surface on the scan electrode because of the instability of the induction suspending current potential on the metal otter board electrode.The minimizing of wall electric charge will cause discharge delay in the addressing period, produce unsettled address discharge and screen flicker.This also needs the problem that solves.
Summary of the invention
The present invention be directed to existing driving method and have the problem that shows shakiness and be prone to screen flicker, invent a kind of new driving method, make it can be in initialization cycle according to the waveform of scan electrode in initialization cycle, give former voltage control signal of metal otter board electrode that is in suspended state, suppress to fail to wipe clean wall electric charge and keeping misplacing of phase generation, solution causes discharge delay in the addressing period, produces problems such as unsettled address discharge and screen flicker.
Technical scheme of the present invention is:
The driving method of a kind of slot type plasma metal otter board electrode during initialization is characterized in that: at first, with the metal gate web plate as electrode and make it form and exchange respectively with between scan electrode and the addressing electrode to the phase discharge pattern; Secondly, each frame that need are shown is divided into son, during each son field comprises initialization, address period, keep during and between erasing period; The 3rd, in the driving process of groove type plasma display panel, to the metal otter board electrode Loading Control signal that is in originally under the suspended state, during keeping by being controlled at of this control signal and still make metal otter board be in the suspension duty between erasing period, and during initialization and in the address period, by to applying different voltage pulse signals on the metal otter board, improve the accumulation of all discharge cell wall electric charges, guarantee the positive wall electric charge that gathers on the protective seam surface on the addressing electrode wall electric charge, reduce the generation that misplacing electricity near initiation voltage level; And in address period, how the discharge condition of each unit does not guarantee that the unit of not lighted a fire is not subjected to be influenced by the discharge of igniting unit in the pipe yard.
The voltage waveform of metal otter board electrode of the present invention during corresponding to initialization has three parts, and they are: do not reach producing the first of the voltage V1 of faint discharge between scan electrode and the addressing electrode; Before descending in rain in order to ensure scan electrode voltage, the metal otter board electrode voltage is risen to the second portion of V2 from V1; When the scan electrode ramped shaped descends, keep the constant third part of metal otter board electrode voltage V2.
It is variable being applied to voltage V1 on the metal otter board electrode and the potential difference (PD) between the V2 in during initialization; Voltage V1 and V2 or equate, or V1 is greater than V2, or V1 is less than V2.
In the first of described voltage waveform, second portion and the third part, select wherein at least one part, make this voltage waveform include the ramped shaped waveform.
In the first of described voltage waveform, second portion and the third part, select wherein at least one part, the voltage waveform that above-mentioned driving circuit is added includes the exponential function waveform.
In the first of described voltage waveform, second portion and the third part, select wherein at least one part, make its voltage waveform include the waveform that forms by the mutually different ramped shaped waveform combination of a plurality of voltage change ratios.
It is synchronous being applied to the zero-time that the zero-time of the voltage V1 on the metal otter board electrode and the initialization pulse waveform in the scan electrode apply in initialization cycle.Be applied on the metal otter board electrode before also can reaching scan electrode and metal otter board electrode formation discharge in the potential difference (PD) between the voltage on initialization pulse voltage and the metal otter board electrode.
The voltage that is applied in initialization cycle on the metal otter board electrode both can be synchronous from the zero-time that V1 changes to the zero-time of V2 and the rapid drop-out voltage of initialization pulse the scan electrode, also can be before the zero-time of the rapid drop-out voltage of initialization pulse, to guarantee again the voltage drop on the scan electrode to be got off under the smaller state of potential difference (PD) between metal otter board electrode and the scan electrode, prevent from during initialization, to bring out misplacing.
The first half of metal otter board electrode during corresponding to initialization, driving circuit imposes on the metal otter board electrode and is operated in the V1 voltage status; Guarantee that the metal otter board electrode produces between scan electrode and addressing electrode in the faint discharge process, the metal otter board electrode does not participate in the faint discharge between scan electrode and the addressing electrode, reduces the generation that misplaces electricity; Center section during initialization, driving circuit changes to the V2 voltage status with the operating voltage on the metal otter board electrode from V1, and guarantees that V2 voltage does not participate in faint discharge between scan electrode and the addressing electrode at the center section during the initialization; And the latter half during initialization, utilize driving circuit to be applied to the constant voltage V2 of metal otter board electrode, between the decline ramp voltage of scan electrode and metal otter board electrode, produce faint discharge, and faint discharge no longer takes place between scan electrode and the addressing electrode; Originally accumulate in by producing faint discharge between scan electrode and the metal otter board electrode, making that the lip-deep negative wall electric charge of protective seam and the lip-deep positive wall electric charge of protective seam that accumulates on the metal otter board electrode all can weaken on the scan electrode; The lip-deep positive wall electric charge of protective seam on addressing electrode then remains unchanged, and guarantees the positive wall electric charge that gathers on the protective seam surface on the addressing electrode wall electric charge near initiation voltage level.
The voltage waveform combination that the voltage waveform of metal otter board electrode during corresponding to initialization said more than three forms, consider the waveform that the control waveform on the metal otter board electrode has at least the voltage waveform of a part to include oblique wave shape waveform, exponential function waveform or formed by the mutually different a plurality of oblique wave shape waveform combination of voltage change ratio from prevent the angle that mis-ignition takes place during initialization.
What the type of drive of plasma display panel adopted usually is that shades of colour is divided into a plurality of sons field to one, is partitioned into the time of lighting with the time partitioning scheme, shows all middle gray by this kind combination.At this moment in order on display panel, to demonstrate image, in this each height field, have the addressing period that writes and keep keeping the cycle of discharge, a kind of like this display mode is called as ADS (AddressDisplay-period Separation, the address demonstration-time is cut apart) driving method.Adopt this driving method, normally an initialization cycle that adds initialization pulse is set, stably write with this one initial or in each height field initial.Initialization pulse is square wave, oblique wave, exponential wave normally; Also can adopt the waveform that sharply descends the ascending part branch to combine with rapid rising part of voltage and voltage by ramp waveform.
Fig. 4 is common combination waveform of initialization, and here the work schedule with Fig. 4 describes the working condition of former groove type plasma display panel at initialization cycle in detail.
As shown in Figure 4, at whole initialization cycle, driving circuit makes addressing electrode remain on 0 (V), and the metal otter board electrode is in suspended state.Because the metal otter board electrode is a suspended state, its current potential in whole initialization cycle is to change along with the variation of the waveform of initialization of scan electrode in initialization cycle, promptly is to produce along with scan electrode changes and the induction voltage waveform of variation.
First half at initialization cycle, be added in voltage on the scan electrode since 0 (V), skyrocket to the voltage Va (V) that addressing electrode is not discharged, subsequently, voltage slowly rises to the voltage Vb (V) (hereinafter to be referred as ramp voltage) that discharges towards to the generation to addressing electrode.During ramp voltage, all discharge cells, for the first time faint initialization discharge takes place between scan electrode and addressing electrode, for the metal otter board electrode that is in suspended state, the current potential Vb ' that responds on the metal otter board electrode (V) will be less than the voltage Vb (V) on the scan electrode, when the potential difference (PD) of the current potential Vb ' that responds on voltage Vb (V) on the scan electrode and the metal otter board electrode between (V) reaches sparking voltage between them, the situation of for the first time faint initialization discharge also will take place between scan electrode and metal otter board electrode.So, the protective seam surface on scan electrode will accumulate negative wall electric charge.Then can accumulate positive wall electric charge in dielectric layer surface on the addressing electrode and the protective seam surface on the metal otter board electrode.Owing to had more between scan electrode and the metal otter board electrode and produced discharge, made back of the body end brightness increase to some extent.
At the latter half of initialization cycle, driving circuit suddenly descends the voltage that is added on the scan electrode, the voltage Vc (V) that land vertically scan electrode and addressing electrode do not discharge.Because the metal otter board electrode still is in suspended state, the current potential Vc ' that responds on the metal otter board electrode (V) will be less than the voltage Vc (V) on the scan electrode.
Subsequently, driving circuit makes the voltage that is added on the scan electrode get oblique wave shape waveform from voltage Vc (V) to descend, land vertically the current potential Vd ' that responds to the metal otter board electrode (V) and the potential difference (PD) between the voltage on the scan electrode greater than the voltage Vd (V) that begins to discharge between scan electrode and the metal otter board electrode.For the second time faint initialization discharge all can take place between scan electrode and metal otter board electrode in all discharge cells.So, accumulating in lip-deep negative wall electric charge of protective seam on the scan electrode and the lip-deep positive wall electric charge of protective seam that accumulates on the metal otter board electrode originally all can weaken; Positive wall electric charge on the dielectric layer surface on the addressing electrode then remains unchanged.
From the structure of Fig. 1 groove type plasma display panel as can be seen, the row electrode 22 of groove type plasma display panel, column electrode 12 and metal otter board electrode 30 are in vertical distribution, and metal otter board electrode 30 is between row electrode 22 and column electrode 12.Because in initialization cycle, addressing electrode remains on 0 (V) state always, when latter half at initialization cycle, for the second time faint initialization discharge (V) and the potential difference (PD) between the addressing electrode when taking the lead in reaching sparking voltage can take place in the current potential Vd ' that responds on the metal otter board electrode between addressing electrode and the metal otter board electrode.So, accumulated in the lip-deep positive wall electric charge of protective seam on the metal otter board electrode originally and the positive wall electric charge that accumulates on the dielectric layer surface on the addressing electrode all can weaken.Make that the positive wall electric charge on the dielectric layer surface on the addressing electrode can't be near the wall electric charge of initiation voltage level.Influenced addressing speed.
Though simultaneously owing to when each finishes, be provided with between the erasing period of wiping the wall electric charge that is gathered, but because the influence of factors such as illuminating state, sometimes can not be clean between erasing period the wall charge erasure, various piece at above-mentioned initialization pulse voltage, fail to wipe those clean discharge cells for those wall electric charges, will occur among Fig. 4 E1 and partly take place to misplace for the first time.And chain misplacing also can partly take place at E2 and E3 in unit in that electricity took place to misplace for the first time E1 in frequent succession.
What take place at above-mentioned E3 place misplaces electricity, can play with initialization during after to write the effect of discharge the same with data that address period takes place, therefore, in this case, will bring out misplacing during keeping.Promptly there is not the discharge of keeping that discharge cell that data write takes place.
This electricity that misplaces all can not take place though be not every, and it is different from the weak discharge that takes place usually during the initialization, and human eye is easy to identification, is the major reason that picture quality degenerates therefore.
Because during this initialization; the metal otter board electrode is in suspended state always; from the structure of SMPDP shown in Figure 1 as can be seen; the metal otter board electrode is between scan electrode and the addressing electrode; the metal otter board electrode that is in suspended state will produce harmful effect to the electric field of scan electrode and addressing electrode formation; and As time goes on, also can slacken and accumulate in the lip-deep negative wall electric charge of protective seam and the positive wall electric charge on the dielectric layer surface on the addressing electrode on the scan electrode.The minimizing of wall electric charge will cause discharge delay in the addressing period, produce unsettled address discharge and screen flicker.
The present invention puts forward just in view of the above problems, purpose is owing to fail to wipe clean so that all residual wall electric charge that remnants are arranged on part or all electrode at erasing period partition electric charge, mis-ignition takes place during can being suppressed at and keeping in metal otter board electrode control device in this slot type plasma display device provided by the invention and driving method, improves addressing speed.Solve problems such as screen flicker.
Beneficial effect of the present invention:
The present invention proposes a kind of slot type plasma metal otter board electrode control device and driving method during initialization, exactly during the slot type plasma scan electrode enters initialization, driving circuit imposes on a kind of Control of Voltage waveform of metal otter board electrode, make first half during initialization, guarantee that the metal otter board electrode produces in the faint discharge process between scan electrode and addressing electrode, can not and scan electrode and addressing electrode between produce faint discharge, reduce the generation that misplacing electricity.And the front and rear part during initialization, utilize driving circuit to be applied to the constant voltage control waveform of metal otter board electrode, make and produce faint discharge between scan electrode and the metal otter board electrode, and faint discharge no longer takes place between scan electrode and the time electrode, originally accumulate in by producing faint discharge between scan electrode and the metal otter board electrode, making that the lip-deep negative wall electric charge of protective seam and the lip-deep positive wall electric charge of protective seam that accumulates on the metal otter board electrode all can weaken on the scan electrode; Positive wall electric charge on the dielectric layer surface on the addressing electrode then remains unchanged.Guarantee positive wall electric charge that the dielectric layer surface on the addressing electrode gathers wall electric charge near initiation voltage level, simultaneously, because the metal otter board electrode no longer is in suspended state during whole initialization, the stability of the positive wall electric charge that the negative wall electric charge that accumulates that produced by initialization pulse and addressing electrode upper dielectric layer surface accumulate is guaranteed in utilization on dielectric surface on the scan electrode, improved addressing speed, reduce back of the body end brightness, improve the consistance of the addressing of whole screen, reduce the generation that misplaces electricity, made the contrast of SMPDP be largely increased.
Description of drawings
Fig. 1 is the structural representation of groove type plasma display panel of the present invention.
Fig. 2 is the block scheme of the display device structure of groove type plasma display panel of the present invention.
Fig. 3 is the scheduling synoptic diagram of a field when showing 265 gray shade scales with ADS driving method of the present invention
Fig. 4 is a voltage oscillogram during the initialization of SMPDP display board metal otter board electrode of the present invention when being in suspended state.
Fig. 5 is that present embodiment of the present invention is in the oscillogram that is added in pulse on the web plate electrode during the initialization.
Fig. 6 is in the oscillogram that is added in pulse on the web plate electrode during the initialization in the example 1 of the present invention.
Fig. 7 is in the oscillogram that is added in pulse on the web plate electrode during the initialization in the example 2 of the present invention.
Fig. 8 is added in pulse combined circuit block diagram on the web plate electrode in formation during the initialization in the embodiments of the invention.
Fig. 9 is forming the combination be added in first pulse and second pulse on the web plate electrode among the embodiment during the initialization.
Figure 10 is first pulse-generating circuit of the present invention.
Figure 11 is second pulse-generating circuit of the present invention.
Figure 12 is a kind of optional driving method working example voltage oscillogram of groove type plasma display panel of the present invention.
Figure 13 is that groove type plasma display panel metal otter board electrode S of the present invention is at optional drive unit of address period.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Fig. 1 is the major part oblique view of the structure of the groove type plasma display panel (to call SMPDP in the following text) that is used for representing present embodiment.
The structure of groove type plasma display panel mainly by prebasal plate 11 aperture plate plates 30 and metacoxal plate 21, constitute.Metacoxal plate 21 comprises back substrate glass substrate 20, film first electrode 22 (row electrode, addressing electrode) that forms on back substrate glass substrate 40, the insulation course 23 and the diaphragm 24 that form on back substrate glass substrate 20; Prebasal plate 11 comprises preceding substrate glass substrate 10, form on preceding substrate glass substrate 10 lower surfaces with metacoxal plate 21 on second electrode 12 (column electrode, scan electrode) of 22 one-tenth spatial vertical quadratures of first electrode, the dielectric layer 13 that on the lower surface of second electrode 12, forms, the diaphragm 14 that on preceding substrate glass substrate 11 and dielectric layer 12, forms; Column electrode and row electrode are in vertical distribution after forward and backward substrate assembling is finished; The aperture plate plate 30 that is clipped between the front- back baseboard 11,21 is current-carrying plates (metal otter board electrode) that comprise the grid hole array, and it can be a sheet metal, can also be the dielectric-slab that the surface plates metal conducting layer.It is corresponding one by one with the position, point of crossing of column electrode and row electrode that mesh on the aperture plate plate constitutes discharge space 40, discharge gas is closed in the discharge space 40, phosphor powder layer 31 is formed on side in discharge space 40 and bottom, and phosphor powder layer 31 is made up of the red, green, blue fluorophor according to isosceles triangle.
Make the material of scan electrode group and address electrodes of address electrode group, can use gold (Au), silver (Ag), copper (Cu), chromium (Cr), nickel (Ni), platinum metals such as (Pt), but, in order to ensure bigger machining area is arranged in the discharge cell, for scan electrode group, had better adopt by ITO, SnO
2, ZnO and so on the transparency electrode of the ratio broad that constitutes of conducting metal oxide on the compound electrode of stacked one deck silver (Ag) electrode.And, having the panel of the SMPDP of this structure, scan electrode and addressing electrode those parts of intersecting at it have just formed the luminescence unit that can send red (R), green (G), blue (B) each coloured light.
Because SMPDP adopts aperture plate plate 30 to replace traditional PD P to make the technology of barrier on metacoxal plate, SMPDP is a sandwich structure, and the manufacture craft of its front-back baseboard is except electrode is made, and other manufacture crafts are duplicate.
The manufacturing of preceding substrate.
Preceding substrate 10 forms in the following manner: form electrode group 12 on front glass panel 11, and coat layer of lead glass at its top and fire then to form dielectric layer 13.On the surface of dielectric layer 13, form protective seam 14.In the surface of protective seam 14, form small indenture and projection then.
Can form electrode group 12 by conventional method, in described method, form ito thin film and by etching away the unwanted part of film by sputter.Then, using serigraphy to coat silver electrode sticks with paste and gains is fired.Perhaps, can easily obtain the accurate electrode of making by scanning coating (ink) that spray, that comprise the material that forms electrode.
The lead mixture that is used for dielectric layer 13 contains 70% massicot (PbO), 15% diboron trioxide (B
2O
3) and 15% silicon dioxide (SiO
2), and can and fire by serigraphy and form.As a kind of specific process, apply by serigraphy and to mix the potpourri that obtains with organic bond (the dissolved α-terpilenol wherein of 10% ethyl cellulose) and it was fired ten minutes at 580 ℃.
The manufacturing of back substrate.
Back substrate is made with the following methods: come the silver coating electrode paste and fire the gained result, calculated address electrode group 22 on upper glass plates 21 by adopting serigraphy.On this, use and carry out serigraphy with the used same way as of dielectric layer 13 and fire, make dielectric layer 23 by lead glass.Then, use with the used same way as of protective seam 14 and form protective seam 24.
The manufacturing of aperture plate plate.
The aperture plate plate is made with the following methods: the general CRT shadow mask aperture plate plate that adopts by the special construction design of aperture plate plate can also be the dielectric-slab that the surface plates metal conducting layer.Mesh on the aperture plate plate 30 constitutes discharge space 40.At first, at aperture plate plate surface spraying one deck titanium valve, again the red, green and blue fluorophor is sprayed to respectively in the aperture plate plate corresponding aperture of precognition, also can adopt the method for serigraphy that the red, green and blue fluorophor is printed onto each corresponding space respectively, fire then.Form fluorescence coating 31.Can use routine to be used for the versicolor fluorophor of PDP.Below be the specific example of this fluorophor:
Red-emitting phosphors: (Y
xGd
1-x) BO
3: Eu
3+
Green-emitting phosphor: BaAL
12O
19: Mn
Blue emitting phophor: BaMgAl
14O
23: Eu
2+
SMPDP makes with following method: at first, aperture plate plate 30 and back substrate 21 are positioned placement, the sandwich structure of substrate, aperture plate plate and back substrate before forming, with seal glass preceding substrate and back substrate are fixed together, to be evacuated by the discharge space 40 that aperture plate plate 30 forms simultaneously, formation is about 1 * 10
-4The high vacuum of Pa (handkerchief).Then, the gas of specific mixture is sealed in the discharge space 40 with specified pressure.
The pressure of described sealing discharge gas conventionally is not higher than atmospheric pressure, usually about 1 * 10
4Pa to 7 * 10
4In the scope of Pa.But, be provided with and be higher than atmospheric pressure (promptly 8 * 10
4Pa or more than) improved brightness of glass screen and luminescence efficiency.
Fig. 2 is expressed as grooved plasma display screen drive unit configuration schematic diagram.
Grooved plasma display screen 110 (SMPDP) is included in the scan electrode SCN that is parallel to each other 1 to the SCN n on the prebasal plate 11 among Fig. 2, the addressing electrode D1 to Dm that is parallel to each other on the metacoxal plate 21, and the metal otter board electrode S that forms by metal gate web plate 30, scan electrode 12 (SCN electrode) and the orthogonal thereto shape distribution of addressing electrode 22 (D electrode), metal otter board electrode (S electrode) is between front- back baseboard 11,21, and separately adjacent discharge cell, prevent discharge diffusion, form interchange the phase discharge pattern in adjacent discharge minizone.So that can obtain high-resolution demonstration.
Fig. 3 represents when the gray scale of performance 256 grades the division methods of a field.
The drive unit of SMPDP drives by time-division gray scale display mode in the field. one by during the initialization and following closely each son (address period, keep during, between erasing period) form, repeat to belong to the work of a son by repeatedly (for example 8 times), the image that carries out shows.Drive unit 100 is made up of six parts, they are: to the pretreater of handling from the input image data of external image follower 101, store the frame memory 102 of treated view data, produce the clock-pulse generator 103 of synchronizing pulse in each and each son field, add the scanner driver 104 of pulse to scan electrode SCN, on metal otter board electrode S, add the metal otter board driver 105 of pulse control signal, and the data driver 106 that on data electrode D, adds pulse.
Pretreater 101 is extracted every view data (field picture data) out from the view data of input, constitute the view data (image in sub-fields data) of respectively giving the field from the field picture data of being extracted out again, and they are deposited in the frame memory 102.
In addition, pretreater 101 also according to the current image in sub-fields data run of frame memory 102 stored to data driver 106 output datas, and from the view data of input, pick signal synchronously such as horizontal-drive signal and vertical synchronizing signal, carry synchronizing signal according to each or each son field to clock-pulse generator 103.
Frame memory 102 is provided with two memory blocks (storing 8 width of cloth image in sub-fields) that belong to for each, is one two port frame storer.So just can one towards one of them memory block write field view data, one side is read the field picture data that are written in it from another memory block, so hocketing writes and reads action.
Clock-pulse generator 103 produces indication setting, scanning, web plate control and eliminates the trigger pip of each timing that should occur in the pulse.These trigger pips are to produce on every the basis with the synchronizing signal of each son field that is used for of receiving from pretreater 101, make initialization pulse, scanning impulse, keep pulse, the trigger pip of erasing pulse and the work of web plate gating pulse, and deliver to driver 104,105 and 106.
Scanner driver 104 has initialization pulse generator 111, scanning impulse to send device 112, keeps pulse producer 113 and eliminates pulse producer 114, they produce initialization pulse, scanning impulse, keep pulse and eliminate pulse corresponding to the trigger pip of sending here from clock-pulse generator 103, are added on the scan electrode SCN.
Web plate electrode driver 105 has to suspend isolates generator 115, initialization phase pulse producer 116 and address period pulse producer, they produce the web plate suspension corresponding to the trigger pip of sending here from clock-pulse generator 103 and isolate pulse, web plate initialization pulse and the pulse of web plate address period, are added on the web plate electrode S.
In addition, for the time on the forward position of all negative pulses and edge, back, also be to determine according to the trigger pip that clock-pulse generator 103 is sent here.
The pulsion phase of announcing in open No. 00/30065 communique of WO in this initialization pulse and the above-mentioned world (day is than wild) does not elaborate together here.Ramp waveform part on the initialization pulse produces with Miller integrator.Here do not elaborate.
This keeps a kind of " bipolar energy recovering maintenance drive unit " (open No of Chinese patent application that pulse and the applicant formerly propose.200410014442.8) the middle pulsion phase of announcing together.At the asymmetric problem of discharge, can adopt the applicant to be called " asymmetric pulse driving circuit and the driving method thereof kept of bipolarity " (open No of Chinese patent application in the name of first to file.200610038283.4) patent of invention solve.Here do not elaborate.
Pulsion phase that this scanning impulse and eliminate is announced in " the image display driver circuit and the driving method of slot plasma display board " (the Chinese patent application publication number 200410064870.1) or " driving circuit and driving method thereof are kept in the high voltage scanning of flute profile plasma display panel " (Chinese patent application publication number 200410064950.7) that pulse and applicant formerly propose together.Here do not elaborate.
The pulsion phase of announcing in " three-electrode driving method of slot plasm display plate " (Chinese patent application publication number 200710025095.2) that this web plate suspension isolation and the pulse of web plate address period and applicant formerly propose together.Here do not elaborate.
The driving method of the SMPDP display device web plate initialization pulse during initialization with said structure is described below again.
Fig. 5 is that present embodiment is in the oscillogram that is added in pulse on the metal otter board electrode during the initialization.
As shown in Figure 5, during initialization, be added on web plate initialization pulse waveform by web plate electrode driver 105 and be split into four parts of B1-B4, the pulse waveform that is added on scan electrode SCN by scanner driver 104 is split into seven parts of A1-A7 (Fig. 6).
And during this period, data electrode D is owing to remained on the 0V current potential by data driver 106 always, and the potential difference (PD) between scan electrode SCN and the data electrode D also has same waveform with the pulse of the scan electrode SCN that is added on Fig. 5.Equally, the potential difference (PD) between web plate electrode S and the data electrode D also with Fig. 5 in the pulse of web plate electrode S same waveform is arranged.
When asking beginning (t0) in the initialization phase, web plate electrode driver 105 is a benchmark with 0 (V), and the web plate electrode applies a positive pulse that rises to V1 (V) from suspended state to web plate electrode S.What the rising edge of this positive pulse was positioned at constantly t0 and t1 asks that the voltage (to call web plate voltage Vs in the following text) that is added on web plate electrode S is placed in V1 (V) (B1 part), and the voltage that is added on scan electrode SCN is (to call scanning voltage V in the following text
SCN) rise to Va (V) from O (V).The beautiful Va of this electricity (V) is than little to the voltage of web plate electrode S and data electrode D generation discharge from scan electrode SCN.
From moment t0 to t1, this section period, scanning voltage V
SCNShown in A2 part among the figure, rise to voltage Vb (V) from voltage Va (V), present the ramped shaped waveform.This voltage Vb (V) has surpassed the voltage that begins to discharge to data electrode D from scan electrode SCN.
Ask that in this phase web plate voltage V is maintained V1 (V) current potential (B2 part) by web plate electrode driver 106 always.And guarantee that potential difference (PD) between web plate electrode voltage and scan electrode voltage and the addressing electrode voltage is less than the voltage that begins to discharge.
The slope of the ramped shaped waveform of this A2 part, that is voltage change ratio [(Vb-Va)/(t1-t0)] gather the angle of wall electric charge and consider from the surface of the protective seam 14,24 that covers each electrode, be advisable with smaller.Therefore, ask, in all discharge cells, for the first time faint initialization discharge can take place all between scan electrode SCN and the data electrode D in this phase.Because this initialization discharge, the surface of protective seam 14 just accumulates negative wall electric charge on scan electrode SCN, and the surface of protective seam 24 just accumulates positive wall electric charge on data electrode D.
Then, during from moment t1 to t4, scanning voltage V
SCNBe maintained at Vb (V) (A3 part).Keep this state, from clock-pulse generator 103 trigger pip is delivered to web plate electrode driver 105, web plate voltage Vs (V) rises to V2 (V) (B3 part) with the ramped shaped waveform from V1 (V).Voltage V2 (V) can not produce the voltage of discharge from web plate electrode S to scan electrode SCN and data electrode D.And web plate electrode voltage Vs is from just maintaining voltage V2 (V) by web plate electrode driver 105 after the t3 constantly.
As shown in Figure 5, this constantly t3 be before moment t4. in other words, web plate electrode voltage Vs is at scanning voltage V
SCNMaintain Vb (V) constant during rise to V2 (V) from V1 (V).
Then, at moment t4, scanning voltage V
SCNSharply drop to Vc (V) (A4 part) from Vb (V).The voltage change ratio of A4 part gets final product greater than 2V/ μ sec, but, from shortening the angle of initialization time, even preferably be set in more than the 10V/ μ sec. web plate electrode voltage Vs is maintained the state of V2 (V), and voltage Vc (V) can not cause the value to web plate electrode S and data electrode D discharge from scan electrode SCN.
And, be used for shortening (Vc-Vb) of the part A 4 of initialization time, preferably can be greater than 150 (V).After this, before t6, scanning voltage V
SCNMaintain voltage Vc (V) (A5 part).
Again, from moment t5 to t6, scanning voltage V
SCNGet the ramped shaped waveform and drop to the voltage Vd (V) (A6 part) that begins to discharge above to the metal otter board electrode from Vc (V).The absolute value of voltage change ratio at this moment [(Vd-Vc)/(t6-t5)] is less than the absolute value of A4 part voltage change ratio.In this A6 part, in all discharge cells, faint initialization discharge can take place between scan electrode SCN and metal otter board electrode S all.And faint discharge no longer takes place between scan electrode and the addressing electrode.Because this faint initialization discharge; all can slacken at 13 lip-deep negative wall electric charges of the protective seam on the scan electrode SCN and the 13 lip-deep positive wall electric charges of the protective seam on metal otter board electrode S. on the other hand, the dielectric layer 23 lip-deep positive wall electric charges on the data electrode D still remain unchanged.
A7 part last makes scanning voltage V
SCNRise to 0 (V), finish during the initialization.Have again, above-mentioned voltage after above-mentioned A7 partly rises is set at 0 (V) in the present embodiment, but also not necessarily must be 0 (V), as long as this voltage is set at the voltage that when data electrode D is applied data pulse, can not discharge between the data electrode D and scan electrode SCN.
In above-described driving method, A2 and A6 partly are used for gathering the wall electric charge, A1 and A4 partly are used to shorten initialization time, therefore, A2 and A6 part are used as initialization pulse with the waveform that A1 and A4 partly combine, the initialization phase asks just and can not extend, and can accumulate enough wall electric charges.
Above saidly can gather wall electric charge this point, be the same with the situation of above-mentioned Fig. 4, still, the driving method of present embodiment also has following effect.
In this driving method, because before moment t3, made metal otter board electrode voltage Vs rise to V2 (V) from V1 (V), so, even fail between erasing period, fully to be eliminated at the wall electric charge that previous field gathers, in a part and even during all just having changed initialization under the still residual situation that residual charge arranged on the electrodes, in this occasion, scan electrode SCN can not misplace with asking of metal otter board electrode S at A4 and A6 part yet.
This be because, with have between scan electrode SCN and the metal otter board electrode S in descending very big potential difference (PD) (Vb-Vb ') (V) different at A4 part voltage among above-mentioned Fig. 4, the situation of Fig. 5 in the present embodiment, potential difference (PD) (V2-Vb) are (V) (V) little than (Vb-Vb ').
This shows, in the SMPDP display device that drives in this way, can not bring out the electricity that misplaces during keeping, thereby can not produce one by write the starting point that causes by mistake.
And the foregoing description is used for illustrating the driving method of one embodiment of the invention, but is not limited to this. for example, in the above-described embodiments, (the B3 part that v) rises to V2 (V) is with scanning voltage V from V1 for metal otter board voltage Vs
SCNThe A3 part that maintains Vb (V) is overlapping in time, but in fact, if the B3 part begin to be arranged in after for the first time faint initialization discharge of beginning just passable, also can be arranged in before the moment t1.
In addition, the voltage change ratio of ramped shaped waveform of A2, A6 and B3 part among Fig. 5 under the condition of the time-consuming permission of initialization institute, from preventing to misplace the angle of electricity, still is smaller relatively good.
Example 1.
In the driving method of this example 1, the initialization phase ask be added in the pulse on each electrode oscillogram as shown in Figure 6.
In the description of Fig. 5, scanning voltage V
SCNIn A2 and the B3 part of A6 part and metal otter board electrode voltage Vs all get the ramped shaped waveform, and in this example 1, as shown in Figure 6, corresponding part all is the index function waveform.The voltage waveform of other parts except vexed above-mentioned A2 of initialization phase, A6 and B3 part is all identical with counterpart among above-mentioned Fig. 5.
Adopt this driving method, gather the wall electric charge by the voltage that adds A8 and A9 part, Fujian when utilizing A1 and A4 partly to shorten initialization, that is used two kinds of waveform combination combined waveform together as initialization pulse, initialization time just can not extend, and can accumulate enough wall electric charges.
And, in the driving method of this example, be before moment t3, just to have made to make metal otter board electrode voltage Vs rise to V2 (V) from V1 (V), therefore, even fail between erasing period, to eliminate clean at the wall electric charge that previous field gathers, in a part and even during all just changing initialization under all residual situation that residue wall electric charge arranged on the electrodes, in this occasion, scan electrode SCN still can not misplace between A4 and A9 part and metal otter board electrode S.
Though the situation of above-mentioned advantage and above-mentioned Fig. 5 is sample basically, but, in the driving method of this example,, compare with the above-mentioned situation that applies the ramped shaped waveform voltage because what use is the waveform of above-mentioned exponential function, the relatively simple for structure easy row of driving circuit, thus manufacturing cost can be reduced.
Have, as long as within the initialization time that is allowed, the time constant value of setting is the smaller the better again.
And, in this driving method,, in fact, also can only rise to lower voltage than V2 (V) though just make metal otter board electrode voltage Vs rise to V2 (V) in B5 part, treat last during the initialization, step rises to V2 (V) and gets final product again.
Example 2.
Fig. 7 is in the oscillogram that is added in the pulse on each electrode during the initialization in this example 2.
As shown in Figure 7, the waveform of the voltage that applies in this example 2 is characterized in that in above-mentioned change example 1 original those intervals of using the exponential function waveform have made the combined waveform that is got up by a plurality of ramped shaped waveform combination into.
During from moment t0 to t2, scanning voltage V
SCNWaveform form by two ramped shaped waveform combination.In other words, the phase from moment t0 to t7 asks it is ramped shaped waveform 1 (A10 part), is ramped shaped waveform 2 (A11 part) during from moment t7 to t2.In addition, at moment t7, there is not the gap between waveform 1 and the waveform 2.
The voltage change ratio of two ramped shaped waveforms, their maximal value all are set in below the 10V/ μ sec. and the same with above-mentioned situation, this also is to misplace in order to prevent.
In like manner, the scanning voltage VSCN from moment t5 to this section of t6 also has the metal otter board electrode voltage Vs from moment t2 and this section of t3, also all has the waveform that is formed by two ramped shaped waveform combination.It is following with below the 10V/ μ sec that the voltage change ratio of these two sections time waveforms, their maximal value are set in 200V/ μ sec respectively.
In addition, the voltage waveform of other parts all with above-mentioned driving method in identical.
Top this driving method, be by adding partly that at A11 and A13 voltage gathers the wall electric charge, utilize A10, A4, A12 and B6 partly to shorten initialization time, that is a combined waveform that is got up by two kinds of waveform combination is used as initialization pulse, just can not extend during the initialization, and can accumulate enough wall electric charges.
And, the driving method of example 2, be before moment t3, just to make metal otter board voltage Vs rise to V2 (V) from V1 (V), therefore, even it is clean that the wall electric charge that previous field gathers fails between erasing period to eliminate, in a part and even during all just changing initialization under all residual situation that residue wall electric charge arranged on the electrodes, in this occasion, when adding the voltage of A4, A12, A13 part, can not misplace between scan electrode SCN and the metal otter board electrode S yet.
This above-mentioned advantage is the same with the situation among Fig. 5, still, and in the driving method of this example, owing to further set the waveform that forms by a plurality of ramped shaped waveform combination, make and select the degree of freedom of initialization pulse waveform to greatly increase, in other words, in this driving method.Just misplacing electric possibility than the higher smaller waveform of position ability setting voltage rate of change, the bigger waveform of setting voltage rate of change then at other positions, so just both can prevent from effectively to misplace again so that take time unlikely longly during the initialization.
Have again, in above-mentioned driving method,, yet use three or more ramped shaped waveform combination also can together though the ramped shaped waveform that is used for making up is two.
And, only need use the ramped shaped waveform of combining in the part of necessity.
Have again, in this driving method, though just make metal otter board electrode voltage Vs rise to V2 (V) in the B7 part, also can only rise to than V2 (V) is low voltage [for example 50-100 (V)], treat during the initialization at last, rise to step V2 (V) again.
Also the present invention is fully described in conjunction with the accompanying drawings by example above, yet must be pointed out, for the people who is skillful in this technology, they can make many variations and distortion undoubtedly. therefore, about changing and being out of shape the short of scope of the present invention that departs from, they must belong to category of the present invention.
Form the circuit of metal otter board electrode pulse waveform during the initialization.
Pulse-generating circuit, the sort of shown in Fig. 8 can be used for the initialization phase pulse producer 116 shown in Fig. 2, so that the waveform with above-mentioned feature is added on the metal otter board electrode 30 as the gating pulse of metal otter board electrode in the initialization phase.
Pulse-generating circuit shown in Fig. 8 is by the pulse-generating circuit U1 that is used to produce first pulse that has gradually the slope of rising and the second pulse-generating circuit U2 that is used to produce rect.p. constitutes.The first pulse-generating circuit U1 is connected by the mode of floating ground with the second pulse-generating circuit U2.
The first pulse-generating circuit U1 and second pulse-generating circuit U2 response produce first and second pulses from the trigger pip of clock-pulse generator 103.
Here, as shown in Figure 9, pulse-generating circuit U1 produces first pulse on the slope of rising gradually, and pulse-generating circuit U2 produces second pulse of rectangle.And, time-delay t1-t0 time rise time of the starting point of first pulse rise time and second pulse.By the voltage of these two pulses is added together form the output pulse produce have with Fig. 5 in the pulse waveform of the same characteristics of metal otter board waveform electrode.
Figure 10 A and Figure 11 A are the block schemes that the difference indicating impulse produces the structure of circuit U 1 and pulse-generating circuit U2.
Pulse-generating circuit U1 and U2 have following array structure.
As shown in Figure 10 A, pulse-generating circuit U1 is the push-pull circuit that is connected to IC1 (for example IR-2113 that is made by InternationalRecitier).IC1 is the field effect transistor chip for driving, and push-pull circuit comprises and draws FET Q1 (field effect transistor) and drop-down FET Q2.Capacitor C 1 is connected between the grid that draws FET Q1 and the drain electrode, and current limiting element R1 be connected on IC1 terminal H0 and on draw between the grid of FET Q1.Constant voltage Vset1 is added on the push-pull circuit.This voltage Vset1 has the value that equals voltage V2-voltage V1, and voltage V1 and V2 are described in Fig. 5.
Formation comprises the Miller integrator that draws FET Q1, capacitor C 1 and current-limiting resistance R1 in pulse-generating circuit U1, and the waveform of the rise time with mild slope is formed.
Figure 10 B represents the part by the pulse-generating circuit U1 generation that forms first pulse.
Shown in Figure 10 B, when pulse signal VHin1 is input to terminal Hi.And when the pulse signal VLin1 with opposite polarity was input to the terminal Lin of IC1, push-pull circuit was driven under the control of IC1, exported first pulse from lead-out terminal OUT1.First pulse is the slope pulse that rises to the mild slope of voltage Vset1.
Here, the electric capacity C of mild slope rise time t20 and capacitor C 1 in first pulse
1,, the Ha terminal of voltage Vset1, IC1 and the resistance value R of potential difference (PD) VH between the Vs terminal and current-limiting resistance R1
1Have following relationship:
T20＝(C
1×Vset1)/[(Vsec1-VH)/R
1]
＝C
1×R
1×Vset1/(Vset1-VH)
Therefore, by changing the electric capacity C of capacitor C 1
1And the resistance value R of current limiting element R1
1, can adjust rise time t20.
Shown in Figure 11 A, pulse-generating circuit U2 is the push-pull circuit that is connected to IC2 (for example IR2113 that is made by InternationalRecifier).IC2 is the field effect transistor chip for driving, and push-pull circuit comprises and draws FET Q3 and drop-down FETQ4..Constant voltage Vset2 is added on the push-pull circuit.This voltage Vset2.Has the value that equals the V1 of voltage shown in Fig. 5.
Figure 11 B represents the part by the pulse-generating circuit U2 generation that forms second pulse.
Shown in Figure 13 B, as pulse signal VHin: be input to terminal Hi.And when the pulse signal VLin2 with opposite polarity was input to the terminal Lin of IC2, push-pull circuit was driven under the control of IC2, exported second pulse from output terminal OUT2.Second pulse is to rise to voltage Vset2 rect.p..
The height of metal otter board and the requirement of spacing
This is because can guarantee that less than the height of 110 μ m addressing pulse addressing within 1.5 μ s can stably take place, and the height that is less than 80um will make discharge space too narrow, and having increased that addressing is instable may.
When metal otter board 30 height are 80 μ m to 110 μ m, when addressing pulse is the extremely short pulse of about 1.2 μ s, guaranteed stabilizing address.
The suitable spacing of metal otter board 30 is at (especially between 140 μ m to 200 μ m) between 100 μ m and the 200 μ m.Because surpass that the spacing of 200 μ m means bigger glass screen and, make to obtain strong discharge consistently and become because of difficulty for the higher resistance value of every strip electrode line.Simultaneously, make discharge space narrower less than the spacing of 140 μ m (especially less than 100 μ m spacing), thereby address discharge is more unstable.
The thickness of fluorescence coating 31 parts on the substrate preferably should be made as at the thickness between 15 μ m to the 30 μ m (especially between 15 μ m to 25 μ m).Reason be if the thickness of this part less than 15 μ m, then the ultraviolet light efficient that changes visible light into has reduced, and if thickness surpasses 25 μ m (and even surpass 30 μ m), then discharge space becomes narrower, has reduced the ultraviolet light quantity that produces.
Reason is, if the thickness that dielectric layer 13,23 has less than 25 μ m, then electric charge is tending towards dissipating, and makes unstable addressing more likely.Simultaneously, the thickness above 45 μ m has increased driving voltage.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Also the present invention is fully described in conjunction with the accompanying drawings by example above, must be pointed out that for the people who is proficient in this technology, they can make many variations and distortion undoubtedly.Therefore, about changing and distortion, short ofly depart from scope of the present invention, still should belong to category of the present invention.
Claims (8)
1. the driving method of a slot type plasma metal otter board electrode during initialization, at first, with metal otter board as electrode and make it form and exchange respectively with between scan electrode and the addressing electrode to the phase discharge pattern; Secondly, each frame that need are shown is divided into son, during each son field comprises initialization, address period, keep during and between erasing period; The 3rd, in the driving process of groove type plasma display panel, to the metal otter board electrode Loading Control signal that is in originally under the suspended state, during keeping by being controlled at of this control signal and still make metal otter board be in the suspension duty between erasing period, and during initialization and in the address period, by to applying different voltage pulse signals on the metal otter board, improve the accumulation of all discharge cell wall electric charges, guarantee the positive wall electric charge that gathers on the protective seam surface on the addressing electrode wall electric charge, reduce the generation that misplacing electricity near initiation voltage level; And in address period, the discharge condition of each unit is not how in the pipe yard, guarantee that the unit of not lighted a fire is not subjected to be influenced by the discharge of igniting unit, it is characterized in that the voltage waveform during described metal otter board electrode is corresponding to initialization has three parts, they are: do not reach producing the first of the voltage V1 of faint discharge between scan electrode and the addressing electrode; Before descending in rain in order to ensure scan electrode voltage, the metal otter board electrode voltage is risen to the second portion of V2 from V1; When the scan electrode ramped shaped descends, keep the constant third part of metal otter board electrode voltage V2.
2. driving method according to claim 1 is characterized in that: it is variable being applied to voltage V1 on the metal otter board electrode and the potential difference (PD) between the V2 in during initialization; Voltage V1 and V2 or equate, or V1 is greater than V2, or V1 is less than V2.
3. driving method according to claim 1 is characterized in that: in the first of described voltage waveform, second portion and the third part, select wherein at least one part, make this voltage waveform include the ramped shaped waveform.
4. driving method according to claim 1 is characterized in that: in the first of described voltage waveform, second portion and the third part, select wherein at least one part, the voltage waveform that above-mentioned driving circuit is added includes the exponential function waveform.
5. driving method according to claim 1, it is characterized in that: in the first of described voltage waveform, second portion and the third part, select wherein at least one part, make its voltage waveform include the waveform that forms by the mutually different ramped shaped waveform combination of a plurality of voltage change ratios.
6. driving method according to claim 1 is characterized in that: it is synchronous being applied to the zero-time that the zero-time of the voltage V1 on the metal otter board electrode and the initialization pulse waveform in the scan electrode apply during the initialization groove; Be applied on the metal otter board electrode before also can reaching scan electrode and metal otter board electrode formation discharge in the potential difference (PD) between the voltage on initialization pulse voltage and the metal otter board electrode.
7. driving method according to claim 1, it is characterized in that: the voltage that is applied to during initialization on the metal otter board electrode both can be synchronous from the zero-time that V1 changes to the zero-time of V2 and the rapid drop-out voltage of initialization pulse the scan electrode, also can be before the zero-time of the rapid drop-out voltage of initialization pulse, to guarantee again the voltage drop on the scan electrode to be got off under the smaller state of potential difference (PD) between metal otter board electrode and the scan electrode, prevent from during initialization, to bring out misplacing.
8. driving method according to claim 1 is characterized in that: the first half of metal otter board electrode during corresponding to initialization, and driving circuit imposes on the metal otter board electrode and is operated in the V1 voltage status; Guarantee that the metal otter board electrode produces between scan electrode and addressing electrode in the faint discharge process, the metal otter board electrode does not participate in the faint discharge between scan electrode and the addressing electrode, reduces the generation that misplaces electricity; Center section during initialization, driving circuit changes to the V2 voltage status with the operating voltage on the metal otter board electrode from V1, and guarantees that V2 voltage does not participate in faint discharge between scan electrode and the addressing electrode at the center section during the initialization; And the latter half during initialization, utilize driving circuit to be applied to the constant voltage V2 of metal otter board electrode, between the decline ramp voltage of scan electrode and metal otter board electrode, produce faint discharge, and faint discharge no longer takes place between scan electrode and the addressing electrode; Originally accumulate in by producing faint discharge between scan electrode and the metal otter board electrode, making that the lip-deep negative wall electric charge of protective seam and the lip-deep positive wall electric charge of protective seam that accumulates on the metal otter board electrode all can weaken on the scan electrode; The lip-deep positive wall electric charge of protective seam on addressing electrode then remains unchanged, and guarantees the positive wall electric charge that gathers on the protective seam surface on the addressing electrode wall electric charge near initiation voltage level.
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| CN1499464A (en) * | 2002-11-11 | 2004-05-26 | ����Sdi��ʽ���� | Driving device of plasma display panel, and its method |
| CN101086813A (en) * | 2007-07-12 | 2007-12-12 | 南京华显高科有限公司 | Three-electrode driving method of slot plasm display plate |
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| CN1499464A (en) * | 2002-11-11 | 2004-05-26 | ����Sdi��ʽ���� | Driving device of plasma display panel, and its method |
| CN101086813A (en) * | 2007-07-12 | 2007-12-12 | 南京华显高科有限公司 | Three-electrode driving method of slot plasm display plate |
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