CN101021990A - Driving method for plasma display - Google Patents
Driving method for plasma display Download PDFInfo
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- CN101021990A CN101021990A CN 200610023881 CN200610023881A CN101021990A CN 101021990 A CN101021990 A CN 101021990A CN 200610023881 CN200610023881 CN 200610023881 CN 200610023881 A CN200610023881 A CN 200610023881A CN 101021990 A CN101021990 A CN 101021990A
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Abstract
This invention relates to a drive method for plasma displays, in which, one picture of the display includes more than one sub-fields containing the following parts: an initialized period distributing wall charges uniformly on all discharge units, an addressing period generating addressing discharge in order to select the above mentioned discharge units, a maintenance period arousing the discharge unit of the above addressing discharge to generate maintaining discharge of stipulated times decided by the brightness value and an eliminating period utilizing the first elimination waveform of a first polarity and a second elimination waveform of a second polarity different from the first to let the discharge unit generate elimination discharge, which can reduce the unnecessary wall charges left in the unit to the minimum to increase the rest drive of displays and prevent error discharge.
Description
Technical field
The present invention relates to a kind of plasma display dirving method, refer more particularly to: can make through residual unnecessary wall electric charge after eliminating discharge to reach minimized, thereby can prevent to produce a kind of plasma display dirving method that misplaces electricity.
Background technology
Plasma display (Plasma Display Pane1: hereinafter to be referred as " PDP ") is by utilizing He+Xe, Ne+Xe, and the ultraviolet ray that produces during the inert mixed gas discharge of He+Xe+Ne etc. makes light-emitting phosphor, thereby image is shown.For this PDP, it not only is easy to realize ultra-thinization and maximization, and along with the continuous development of present science and technology, can also improve the quality of shown image greatly.
Fig. 1 is the structural representation according to the discharge cell of the three-electrode surface discharge type PDP of prior art.
With reference to Fig. 1 as can be seen, the discharge cell according to the three-electrode surface discharge type PDP of prior art comprises: be arranged side by side the scan electrode 30Y on above-mentioned upper substrate 10 and keep electrode 30Z; Be positioned on the lower basal plate 18 with above-mentioned scan electrode 30Y with keep the addressing electrode 20X that electrode 30Z becomes the orthogonal state.Above-mentioned scan electrode 30Y and keep electrode 30Z and comprise respectively: transparency electrode 12Y, 12Z; A side that is positioned at transparency electrode is along last, metal bus electrode 13Y, 13Z that its width is narrower than the width of transparency electrode 12Y, 12Z respectively.
On the lower basal plate 18 that is provided with addressing electrode 20X, be provided with lower dielectric layer 22 and spaced walls 24.Surface coated in lower dielectric layer 22 and spaced walls 24 has fluorescer, forms one deck fluorophor 26.Addressing electrode 20X is positioned at above-mentioned scan electrode 30Y and keeps on the direction that electrode 30Z intersects.Spaced walls 24 is arranged side by side with addressing electrode 20X, and its effect is exactly to prevent to be revealed to putting contiguous discharge cell by the ultraviolet ray and the visible light of discharge generation.The ultraviolet ray that luminescent coating 26 produces during by plasma discharge can be emitted any one visible light in redness, green or the blueness.In the discharge space between last/lower basal plate 10,18 and the spaced walls 24, be injected with He+Xe, Ne+Xe, the inert mixed gas of He+Xe+Ne etc.
For PDP, for the gray scale to image shows, just a frame is divided into the mutually different a plurality of sons of number of light emission times field, then, again they are carried out the time-division driving.Above-mentioned each height field can be divided into: the initialization phase that the wall electric charge on all discharge cells is distributed equably; Scan line is selected, then the address period of in selected scan line, discharge cell being selected; According to discharge time and to keeping the phase that the gray scale of image shows.
Here, the initialization phase can be divided into again: supply with the starting period of rising oblique line waveform and supply with closing the phase of decline oblique line waveform.For example: when wanting under the situation about image being shown by 256 grades of gray scales, then as shown in Figure 2, the picture interval (16.67ms) that just will be equivalent to 1/40 second is divided into 8 sons (SF1 to SF8).As previously mentioned, above-mentioned 8 sons (SF1 to SF8) can be divided into respectively: the initialization phase; Address period; Keep the phase.The initialization phase of each height field and the situation of address period are identical.On the contrary, the phase of keeping then increases according to the ratio of 2n (n=0,1,2,3,4,5,6,7) in each height field.
Fig. 3 is the synoptic diagram that the drive waveforms to the PDP of foundation prior art shows.As shown in Figure 3, Y is the expression scan electrode, and Z is that electrode is kept in expression, and X is the expression addressing electrode.
With reference to Fig. 3 as can be seen, being divided into the following period according to the driving method of the PDP of prior art drives: the initialization phase that the wall electric charge on all discharge cells is distributed equably; The address period that discharge cell is selected; Make selected discharge cell keep keeping the phase of discharge; And will remain in the elimination phase that the wall electric charge on the discharge cell eliminates.
For the above-mentioned initialization phase, in the starting period (SU), all scan electrode Y all discern rising oblique line waveform (Ramp-up) simultaneously.Just can cause the inner generation discharge of discharge cell of last picture according to the oblique line waveform (Ramp-up) of this rising.Will and keep the wall electric charge of assembling positive polarity on the electrode Z at above-mentioned addressing electrode X by this startup discharge.The wall electric charge that on scan electrode Y, then can assemble negative polarity.
In the phase of closing (SD), after supplying with the oblique line waveform (Ramp-up) that rises, the decline oblique line waveform (Ramp-down) that begins to reduce from the low positive polarity voltage of ceiling voltage than the oblique line waveform (Ramp-up) that rises can be scanned electrode Y identification simultaneously.Here, for above-mentioned decline oblique line waveform (Ramp-down), it can cause that producing faint elimination in the discharge cell discharges.Like this, just the too much wall electric charge that is produced can be eliminated a part.Close the wall electric charge that discharge just can allow to produce stable address discharge and be evenly distributed in the discharge cell by this.
In address period, the scanning impulse of negative polarity (scan) can be approved by scan electrode Y successively.Meanwhile, synchronous with scanning impulse (scan), addressing electrode X can approve the data pulse (data) of positive polarity.Here, the voltage difference of scanning impulse (scan) and data pulse (data) is added the wall voltage that is produced in the initialization phase, just can cause to produce address discharge in the discharge cell that data pulse (data) is approved.By in the selected discharge cell of this address discharge, when keeping voltage and approved, just be illustrated in to have assembled in the above-mentioned discharge cell and can cause the wall electric charge that produces discharge.
For the above-mentioned phase Z that keeps, in phase of closing and address period, can supply with the DC voltage (Zdc) of positive polarity.For above-mentioned DC voltage (Zdc), it in the phase of closing can above-mentioned keep between electrode Z and the scan electrode Y to produce close discharge.Simultaneously, do not produce big discharge between the electrode Z in order to guarantee in address period at scan electrode Y and to keep, just can be with the voltage difference of keeping between electrode Z and the scan electrode Y, or the voltage difference of keeping between electrode Z and the addressing electrode X is set.
In the phase of keeping, scan electrode Y and keep electrode Z and can discern keeping pulse (sus) in turn.For the discharge cell of selecting by address discharge, with the wall voltage in the discharge cell with keep pulse (sus) addition, in this case, when each keeps pulse (sus) when being approved, the then above-mentioned discharge cell of selecting by address discharge will and be kept at each scan electrode Y and cause between the electrode Z to produce and keep discharge, just causes to produce to show discharge., keep pulse (sus) for above-mentioned here, the pulse height that can make the discharge process stabilization is about 2～3us.Simultaneously, above-mentionedly keep pulse (sus) and can keep 180～200[V] about keep voltage.In the above-mentioned scope of keeping the about 0.3～1.0us of pulse (sus) after producing, will cause to produce and discharge.Then, keep keeping voltage during in, in discharge cell, can assemble the wall electric charge that causes that generation is discharged next time again.
After keeping the discharge end, in the elimination phase, the pulse elimination waveform (ep) that pulse height and voltage standard are little will be kept electrode Z and be approved.Eliminate waveform (ep) for the pulse in this elimination phase, it can will eliminate by space charge in the discharge cell that remains in last picture of keeping discharge generation and wall electric charge.
But, as mentioned above, in the elimination phase, eliminate waveform (ep) to keeping the pulse that electrode Z supplies with for the drive waveforms of the PDP of foundation prior art, it does not consider the flash-over characteristic deviation.But the voltage of being supplied with after the elimination discharge is finished can append again and produce the wall electric charge, and remains in the discharge cell.This is its existing problem.Specifically, exactly when pulse eliminate waveform (ep) from ground voltage (GND) beginning to keeping in the rising stage that voltage rises to, most discharge cell can not produce eliminates discharge.But, since its to keep voltage higher, and its to keep the phase long again.Therefore, after the elimination discharge was finished, the space charge in the discharge cell will be converted into the wall electric charge, accumulated in then on the dielectric in the discharge cell.Like this, after the elimination discharge was finished, the wall electric charge that is produced can produce bigger influence to next height field again.In other words, exactly after the elimination discharge is finished, the wall electric charge that is produced will make interior sparking voltage of the initialization phase of next height field raise, thereby just makes the wall electric charge that can not form abundance in the initialization phase.Therefore, the state of each space charge of discharge cell will change, thereby just makes can not produce stable address discharge in address period.This unsettled address discharge will cause misplacing under hot conditions electricity and mistake such as writes at problem.
Summary of the invention
The present invention proposes for addressing the above problem just, the object of the present invention is to provide a kind of plasma display dirving method, so that residual unnecessary wall electric charge reaches minimized after the elimination discharge is finished, thereby just can prevent to misplace the generation of electrical phenomena.
To achieve these goals, plasma display dirving method of the present invention, at least the plasma display dirving method that comprises son field more than 1 for a picture, it is characterized in that above-mentioned each height field comprises: the initialization phase that the wall electric charge on all discharge cells is distributed equably; For above-mentioned discharge cell being selected to produce the address period of address discharge; The discharge cell that causes above-mentioned address discharge produces keeps keeping the phase of discharge by the stipulated number of gray-scale value decision; Utilizing the 1st of the 1st polarity to eliminate the 2nd of waveform and 2nd polarity different with the 1st polarity eliminates waveform and makes above-mentioned discharge cell produce the elimination phase of eliminating discharge.
Plasma display dirving method of the present invention, it is characterized in that, the above-mentioned the 1st to eliminate waveform can be to begin the pulse waveform that the voltage to positive polarity rises from reference potential, and the above-mentioned the 2nd to eliminate waveform can be to begin the oblique line waveform that the voltage to negative polarity descends from reference potential.
Plasma display dirving method of the present invention, it is characterized in that, in order to produce the above-mentioned discharge of keeping, the above-mentioned the 1st to eliminate waveform can be towards last is kept the electrode electrode of opposite that pulse approves supplying with supplying with the scan electrode of keeping pulse in turn and keep in the electrode.
Plasma display dirving method of the present invention, it is characterized in that, the above-mentioned the 1st to eliminate waveform can be to begin the pulse waveform that the voltage to negative polarity descends from reference potential, and the above-mentioned the 2nd to eliminate waveform can be to begin the oblique line waveform that the voltage to positive polarity rises from reference potential.
Plasma display dirving method of the present invention, it is characterized in that, in order to produce the above-mentioned discharge of keeping, the above-mentioned the 1st to eliminate waveform can be last is kept the electrode that pulse approves to supply with towards supplying with the scan electrode of keeping pulse in turn and keeping in the electrode.
Plasma display dirving method of the present invention is characterized in that, the above-mentioned the 1st pulse height of eliminating waveform is approximately below the 1 μ s.
Plasma display dirving method of the present invention is characterized in that, the above-mentioned the 2nd pulse height of eliminating waveform is approximately about 40 μ s to 60 μ s, and the above-mentioned the 2nd absolute value of eliminating waveform is approximately below the 100V.
Effect of the present invention:
As mentioned above, has following effect according to plasma display dirving method of the present invention:, also can make the unnecessary wall electric charge that remains in the discharge cell reach minimized degree even it utilizes pulse to eliminate waveform and oblique line is eliminated waveform after producing the elimination discharge.Like this, just can improve the driving surplus of display, can also prevent that generation from misplacing simultaneously.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
Description of drawings
Fig. 1 is the structural representation according to the discharge cell of the three-electrode surface discharge type plasma display of prior art;
Fig. 2 is a synoptic diagram that picture shows to common plasma display;
Fig. 3 is the synoptic diagram that the drive waveforms to the plasma display of foundation prior art shows;
Fig. 4 is the synoptic diagram that the drive waveforms according to the plasma display of the 1st embodiment of the present invention is shown;
Fig. 5 is the synoptic diagram that the drive waveforms according to the plasma display of the 2nd embodiment of the present invention is shown;
Fig. 6 is the synoptic diagram that the drive waveforms according to the plasma display of the 3rd embodiment of the present invention is shown;
Fig. 7 is the synoptic diagram that the drive waveforms according to the plasma display of the 4th embodiment of the present invention is shown.
The symbol description of major part in the accompanying drawing:
10: upper substrate 12Y, 12Z: transparency electrode
13Y, 13Z: metal bus electrode 14,22: dielectric layer
16: diaphragm 18: lower basal plate
20X: addressing electrode 24: spaced walls
26: fluorophor 30Y: scan electrode
30Z: keep electrode
Embodiment
Below, with reference to Fig. 4 to Fig. 7 foundation desirable embodiment of the present invention is described in more details.
Fig. 4 is the synoptic diagram that the drive waveforms according to the PDP of the 1st embodiment of the present invention is shown.
With reference to Fig. 4 as can be seen, being divided into the following period according to the driving method of the PDP of the 1st embodiment of the present invention drives: make the wall electric charge on all discharge cells carry out the equally distributed initialization phase; The address period that discharge cell is selected; Make selected discharge cell keep keeping the phase of discharge; And the pulse that utilizes the 1st polarity oblique line of eliminating waveform (ep) and 2nd polarity different with the 1st polarity is eliminated waveform (sep) and elimination phase that the residual wall electric charge on the above-mentioned discharge cell is eliminated.
For the above-mentioned initialization phase, in the starting period (SU), all scan electrode Y all approve rising oblique line waveform (Ramp-up) simultaneously.Just can cause the inner generation discharge of discharge cell of last picture according to the oblique line waveform (Ramp-up) of this rising.Will and keep the wall electric charge of assembling positive polarity on the electrode Z at above-mentioned addressing electrode X by this startup discharge.The wall electric charge that on scan electrode Y, then can assemble negative polarity.
In the phase of closing (SD), after supplying with the oblique line waveform (Ramp-up) that rises, the decline oblique line waveform (Ramp-down) that begins to reduce from the low positive polarity voltage of ceiling voltage than the oblique line waveform (Ramp-up) that rises can be scanned electrode Y approval simultaneously.Here, for above-mentioned decline oblique line waveform (Ramp-down), it can cause that producing faint elimination in the discharge cell discharges.Like this, just the too much wall electric charge that is produced can be eliminated a part.Close the wall electric charge that discharge just can allow to produce stable address discharge and be evenly distributed in the discharge cell by this.
In address period, the scanning impulse of negative polarity (scan) can be approved by scan electrode Y successively.Meanwhile, synchronous with scanning impulse (scan), addressing electrode X can approve the data pulse (data) of positive polarity.Here, the voltage difference of scanning impulse (scan) and data pulse (data) is added the wall voltage that is produced in the initialization phase, just can cause to produce address discharge in the discharge cell that data pulse (data) is approved.By in the selected discharge cell of this address discharge, when keeping voltage and approved, just be illustrated in to have assembled in the above-mentioned discharge cell and can cause the wall electric charge that produces discharge.
For the above-mentioned phase Z that keeps, in phase of closing (SD) and address period, can supply with the DC voltage (Zdc) of positive polarity.For above-mentioned DC voltage (Zdc), it in the phase of closing (SD) can above-mentioned keep between electrode Z and the scan electrode Y to produce close discharge.Simultaneously, do not produce big discharge between the electrode Z in order to guarantee in address period at scan electrode Y and to keep, just can be with the voltage difference of keeping between electrode Z and the scan electrode Y, or the voltage difference of keeping between electrode Z and the addressing electrode X is set.
In the phase of keeping, scan electrode Y and keep electrode Z and can approve keeping pulse (sus) in turn.For the discharge cell of selecting by address discharge, with the wall voltage in the discharge cell with keep pulse (sus) addition, in this case, when each keeps pulse (sus) when being approved, the then above-mentioned discharge cell of selecting by address discharge will and be kept at each scan electrode Y and cause between the electrode Z to produce and keep discharge, just causes to produce to show discharge.It is here, above-mentioned that to keep the pulse height that pulse (sus) can make the discharge process stabilization be about 2～3 μ s.Simultaneously, above-mentionedly keep pulse (sus) and can keep 180～200[V] about keep voltage.In the above-mentioned scope of keeping about 0.3～1.0 μ s of pulse (sus) after producing, will cause to produce and discharge.Then, keep keeping voltage during in, in discharge cell, can assemble the wall electric charge that causes that generation is discharged next time again.
When keeping after discharge finishes, in the elimination phase, to be kept after electrode Z approves than keeping little the 1st polar impulse elimination waveform (ep) of pulse when pulse height, the 2nd oblique line waveform (sep) different with the 1st polarity also can be kept electrode Z and be approved.Here, pulse is eliminated waveform (ep) and is kept the big or small identical of pulse.
Pulse is eliminated waveform (ep) and is begun to the 1st polarity from reference potential, i.e. the oblique line waveform of keeping the voltage rising of positive polarity (+).Above-mentioned pulse is eliminated waveform (ep) after producing 1 elimination discharge, just can will eliminate by the space charge in the discharge cell that remains in last picture of keeping discharge generation.This pulse is eliminated the pulse height of waveform (ep) greatly below 1 μ s.
Oblique line is eliminated waveform (sep) and is begun to the 2nd polarity from reference potential, i.e. the oblique line waveform of the voltage of negative polarity (-) decline.In this case, the pulse height that oblique line is eliminated waveform (sep) is greatly about about 40 μ s to 60 μ s, and above-mentioned oblique line is eliminated the absolute value of waveform (sep) and is approximately below the 100V.Here, oblique line is eliminated the amplitude and big or small can the changing with the difference of temperature of waveform (sep).This oblique line eliminate waveform (sep) produce eliminate discharge 2 times after, just can produce and eliminate unnecessary space charge and the wall electric charge that discharge left behind afterwards for 1 time and eliminate fully eliminate waveform (ep) by pulse.Specifically, be exactly to eliminate waveform (sep) for this oblique line, after producing the elimination discharge, the space charge in the discharge cell changes, and the wall electric charge that accumulates on the dielectric is eliminated.Thereby just space charge and the wall electric charge safety that remains in the discharge cell can be eliminated.Like this, utilize oblique line to eliminate waveform (sep) and will eliminate the wall electric charge that is produced after the discharge and eliminate, just can make the interior sparking voltage reduction of initialization phase of next son.Thereby just can guarantee in the initialization phase, to produce sufficient wall electric charge.Therefore, produce uniform and stable address discharge, just can prevent the generation of phenomenons such as misplacing electricity and write by mistake, thereby just can improve the driving surplus of display by making each discharge cell.
Fig. 5 is the synoptic diagram that the drive waveforms according to the plasma display of the 2nd embodiment of the present invention is shown.
With reference to Fig. 5 as can be seen, for the driving method according to the PDP of the 2nd embodiment of the present invention, except that the elimination phase, it is identical with the driving method of the PDP of above-mentioned foundation the 1st embodiment of the present invention.Therefore, according among the 2nd embodiment of the present invention, just replace with the related description of above-mentioned foundation the 1st embodiment of the present invention for the explanation during except that the elimination phase other.
In the elimination phase according to the driving method of the PDP of the 2nd embodiment of the present invention, after the pulse elimination waveform (ep) of the 1st little polarity of pulse height was scanned electrode Y approval, the oblique line of 2nd polarity different with the 1st polarity is eliminated waveform (sep) will be scanned electrode Y approval.In this case, pulse is eliminated waveform (ep) and is kept pulse and have identical size.
Pulse is eliminated waveform (ep) and is begun to the 1st polarity from reference potential, i.e. the oblique line waveform of keeping the voltage rising of positive polarity (+).Above-mentioned pulse is eliminated waveform (ep) after producing 1 elimination discharge, just can will eliminate by the space charge in the discharge cell that remains in last picture of keeping discharge generation.This pulse is eliminated the pulse height of waveform (ep) greatly below 1 μ s.
Oblique line is eliminated waveform (sep) and is begun to the 2nd polarity from reference potential, i.e. the oblique line waveform of the voltage of negative polarity (-) decline.In this case, the pulse height that oblique line is eliminated waveform (sep) is greatly about about 40 μ s to 60 μ s, and above-mentioned oblique line is eliminated the absolute value of waveform (sep) and is approximately below the 100V.Here, oblique line is eliminated the amplitude and big or small can the changing with the difference of temperature of waveform (sep).Eliminate waveform (sep) for this oblique line, it produce eliminate discharge 2 times after, just can produce and eliminate unnecessary space charge and the wall electric charge that discharge left behind afterwards for 1 time and eliminate fully eliminate waveform (ep) by pulse.Specifically, be exactly to eliminate waveform (sep) for this oblique line, after producing the elimination discharge, the space charge in the discharge cell changes, and the wall electric charge that accumulates on the dielectric is eliminated.Thereby just space charge and the wall electric charge safety that remains in the discharge cell can be eliminated.Like this, utilize oblique line to eliminate waveform (sep) and will eliminate the wall electric charge that is produced after the discharge and eliminate, just can make the interior sparking voltage reduction of initialization phase of next son.Thereby just can guarantee in the initialization phase, to produce sufficient wall electric charge.Therefore, produce uniform and stable address discharge, just can prevent the generation of phenomenons such as misplacing electricity and write by mistake, thereby just can improve the driving surplus of display by making each discharge cell.
As mentioned above, for driving method according to the PDP of the 1st embodiment of the present invention and the 2nd embodiment, not only it can adopt Same Way for selectivity writes the method for (Selective Writing), and eliminate the method for (Selective Erasig) for selectivity, it also can adopt Same Way.
Fig. 6 is the synoptic diagram that the drive waveforms according to the PDP of the 3rd embodiment of the present invention is shown.
With reference to Fig. 6 as can be seen, for the driving method according to the PDP of the 3rd embodiment of the present invention, except that the elimination phase, it is identical with the driving method of the PDP of above-mentioned foundation the 1st embodiment of the present invention.Therefore, according among the 3rd embodiment of the present invention, just replace with the related description of above-mentioned foundation the 1st embodiment of the present invention for the explanation during except that the elimination phase other.
In the elimination phase according to the driving method of the PDP of the 3rd embodiment of the present invention, after the pulse elimination waveform (ep) of the 1st polarity was scanned electrode Y approval, the oblique line of 2nd polarity different with the 1st polarity is eliminated waveform (sep) will be scanned electrode Y approval.In this case, pulse is eliminated waveform (ep) and is kept pulse and have identical size.
Pulse is eliminated waveform (ep) and is begun to the 1st polarity from reference potential, i.e. the oblique line waveform of keeping voltage decline of negative polarity (-).Above-mentioned pulse is eliminated waveform (ep) after producing 1 elimination discharge, just can will eliminate by the space charge in the discharge cell that remains in last picture of keeping discharge generation.This pulse is eliminated the pulse height of waveform (ep) greatly below 1 μ s.
Oblique line is eliminated waveform (sep) and is begun to the 2nd polarity from reference potential, i.e. the oblique line waveform of the voltage of positive polarity (+) rising.In this case, the pulse height that oblique line is eliminated waveform (sep) is greatly about about 40 μ s to 60 μ s, and above-mentioned oblique line is eliminated the size of waveform (sep) and is approximately below the 100V.Here, oblique line is eliminated the amplitude and big or small can the changing with the difference of temperature of waveform (sep).Eliminate waveform (sep) for this oblique line, it produce eliminate discharge 2 times after, just can produce and eliminate unnecessary space charge and the wall electric charge that discharge left behind afterwards for 1 time and eliminate fully eliminate waveform (ep) by pulse.Specifically, be exactly to eliminate waveform (sep) for this oblique line, after producing the elimination discharge, the space charge in the discharge cell changes, and the wall electric charge that accumulates on the dielectric is eliminated.Thereby just space charge and the wall electric charge safety that remains in the discharge cell can be eliminated.Like this, utilize oblique line to eliminate waveform (sep) and will eliminate the wall electric charge that is produced after the discharge and eliminate, just can make the interior sparking voltage reduction of initialization phase of next son.Thereby just can guarantee in the initialization phase, to produce sufficient wall electric charge.Therefore, produce uniform and stable address discharge, just can prevent the generation of phenomenons such as misplacing electricity and write by mistake, thereby just can improve the driving surplus of display by making each discharge cell.
Fig. 7 is the synoptic diagram that the drive waveforms according to the PDP of the 4th embodiment of the present invention is shown.
With reference to Fig. 7 as can be seen, for the driving method according to the PDP of the 4th embodiment of the present invention, except that the elimination phase, it is identical with the driving method of the PDP of above-mentioned foundation the 1st embodiment of the present invention.Therefore, according among the 4th embodiment of the present invention, just replace with the related description of above-mentioned foundation the 1st embodiment of the present invention for the explanation during except that the elimination phase other.
In the elimination phase according to the driving method of the PDP of the 4th embodiment of the present invention, after the pulse elimination waveform (ep) of the 1st polarity was kept electrode Z approval, the oblique line of 2nd polarity different with the 1st polarity is eliminated waveform (sep) will be kept electrode Z approval.In this case, pulse is eliminated waveform (ep) and is kept pulse and have identical size.
Pulse is eliminated waveform (ep) and is begun to the 1st polarity from reference potential, i.e. the oblique line waveform of keeping voltage decline of negative polarity (-).Above-mentioned pulse is eliminated waveform (ep) after producing 1 elimination discharge, just can will eliminate by the space charge in the discharge cell that remains in last picture of keeping discharge generation.This pulse is eliminated the pulse height of waveform (ep) greatly below 1 μ s.
Oblique line is eliminated waveform (sep) and is begun to the 2nd polarity from reference potential, i.e. the oblique line waveform of the voltage of positive polarity (+) rising.In this case, the pulse height that oblique line is eliminated waveform (sep) is greatly about about 40 μ s to 60 μ s, and above-mentioned oblique line is eliminated the size of waveform (sep) and is approximately below the 100V.Here, oblique line is eliminated the amplitude and big or small can the changing with the difference of temperature of waveform (sep).Eliminate waveform (sep) for this oblique line, it produce eliminate discharge 2 times after, just can produce and eliminate unnecessary space charge and the wall electric charge that discharge left behind afterwards for 1 time and eliminate fully eliminate waveform (ep) by pulse.Specifically, be exactly to eliminate waveform (sep) for this oblique line, after producing the elimination discharge, the space charge in the discharge cell changes, and the wall electric charge that accumulates on the dielectric is eliminated.Thereby just space charge and the wall electric charge safety that remains in the discharge cell can be eliminated.Like this, utilize oblique line to eliminate waveform (sep) and will eliminate the wall electric charge that is produced after the discharge and eliminate, just can make the interior sparking voltage reduction of initialization phase of next son.Thereby just can guarantee in the initialization phase, to produce sufficient wall electric charge.Therefore, produce uniform and stable address discharge, just can prevent the generation of phenomenons such as misplacing electricity and write by mistake, thereby just can improve the driving surplus of display by making each discharge cell.
As mentioned above, for driving method according to the PDP of the 3rd embodiment of the present invention and the 4th embodiment, not only it can adopt Same Way for selectivity writes the method for (Selective Writing), and eliminate the method for (Selective Erasig) for selectivity, it also can adopt Same Way.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (7)
1, a kind of plasma display dirving method comprises more than 1 the plasma display dirving method of son at least for a picture, and it is characterized in that: above-mentioned each height field comprises following components:
The initialization phase that wall electric charge on all discharge cells is distributed equably;
For above-mentioned discharge cell being selected to produce the address period of address discharge;
The discharge cell that causes above-mentioned address discharge produces keeps keeping the phase of discharge by the stipulated number of gray-scale value decision;
Utilizing the 1st of the 1st polarity to eliminate the 2nd of waveform and 2nd polarity different with the 1st polarity eliminates waveform and makes above-mentioned discharge cell produce the elimination phase of eliminating discharge.
2, plasma display dirving method as claimed in claim 1 is characterized in that:
The above-mentioned the 1st to eliminate waveform be to begin the pulse waveform that the voltage to positive polarity rises from reference potential;
The above-mentioned the 2nd to eliminate waveform be to begin the oblique line waveform that the voltage to negative polarity descends from reference potential.
3, plasma display dirving method as claimed in claim 2 is characterized in that:
In order to produce the above-mentioned discharge of keeping, the above-mentioned the 1st to eliminate waveform can be towards last is kept the electrode electrode of opposite that pulse approves supplying with supplying with the scan electrode of keeping pulse in turn and keep in the electrode.
4, plasma display dirving method as claimed in claim 1 is characterized in that:
The above-mentioned the 1st to eliminate waveform be to begin the pulse waveform that the voltage to negative polarity descends from reference potential;
The above-mentioned the 2nd to eliminate waveform be to begin the oblique line waveform that the voltage to positive polarity rises from reference potential.
5, plasma display dirving method as claimed in claim 4 is characterized in that:
In order to produce the above-mentioned discharge of keeping, the above-mentioned the 1st to eliminate waveform can be last is kept the electrode that pulse approves to supply with towards supplying with the scan electrode of keeping pulse in turn and keeping in the electrode.
6, plasma display dirving method as claimed in claim 1 is characterized in that:
The above-mentioned the 1st pulse height of eliminating waveform is below the 1 μ s.
7, plasma display dirving method as claimed in claim 1 is characterized in that:
The above-mentioned the 2nd pulse height of eliminating waveform is 40 μ s to 60 μ s, and the above-mentioned the 2nd absolute value of eliminating waveform is approximately below the 100V.
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| CN 200610023881 CN101021990A (en) | 2006-02-15 | 2006-02-15 | Driving method for plasma display |
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| CN 200610023881 CN101021990A (en) | 2006-02-15 | 2006-02-15 | Driving method for plasma display |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101447165B (en) * | 2007-09-19 | 2011-03-30 | 南京Lg新港显示有限公司 | Plasma display apparatus |
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2006
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101447165B (en) * | 2007-09-19 | 2011-03-30 | 南京Lg新港显示有限公司 | Plasma display apparatus |
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