CN100392709C - Plasma display panel and driving method thereof - Google Patents
Plasma display panel and driving method thereof Download PDFInfo
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- CN100392709C CN100392709C CNB2005100792143A CN200510079214A CN100392709C CN 100392709 C CN100392709 C CN 100392709C CN B2005100792143 A CNB2005100792143 A CN B2005100792143A CN 200510079214 A CN200510079214 A CN 200510079214A CN 100392709 C CN100392709 C CN 100392709C
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/296—Driving circuits for producing the waveforms applied to the driving electrodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/28—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels
- G09G3/288—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels
- G09G3/291—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using luminous gas-discharge panels, e.g. plasma panels using AC panels controlling the gas discharge to control a cell condition, e.g. by means of specific pulse shapes
Abstract
A plasma display panel and driving method thereof. Waveforms for performing a reset operation, an address operation, and a sustain operation are applied to a scan electrode while a sustain electrode is biased with a predetermined voltage, and it is controlled such that the absolute value of a positive voltage of sustain voltage pulses applied to the scan electrode in the sustain period may be greater than the absolute value of a negative voltage thereof. Further, an address electrode is floated when a waveform having a sustain discharge function is applied to the scan electrode, and the voltage at the address electrode is controlled to be increased and decreased according to the voltage at the scan electrode.
Description
Technical field
The present invention relates to plasma display panel (PDP) driver and driving method and plasma scope.
Background technology
The plasma scope plasma that to be a kind of application produce by process gas discharge comes the flat-panel monitor of character display or image, provides tens of to millions of pixels with matrix form thereon according to its size.According to the structure of driving voltage waveform that is provided and discharge cell, plasma scope is divided into DC plasma scope or AC plasma scope usually.
Because the DC plasma scope has the electrode that is arranged in the discharge space, therefore when voltage was provided, they allowed electric current to flow in discharge space, and therefore need be used to limit to their chances the resistor of electric current.On the other hand, be insulated the electrode that layer covers, limit electric current, and guard electrode is avoided the bump of ion when discharge so be formed naturally electric capacity because the AC plasma scope has.Therefore, they have the longer life-span than DC plasma.
Fig. 1 shows the skeleton view of a kind of AC PDP.As shown in the figure, first glass substrate 1 time each other in to and be provided at scanning (Y) electrode of arranging on insulation course 2 and the diaphragm 34 abreast and keep (X) electrode 5.On second glass substrate 6, install and be insulated a plurality of addressing (A) electrode 8 that layer 7 covers.On the insulation course 7 between the addressing electrode 8, form the barrier 9 parallel with addressing electrode 8, and on the surface of the insulation course between the barrier 97 formation fluorescent powder 10.First and second glass substrates 1,6 of discharge space 11 are provided between providing with facing with each other, make scan electrode 4 and keep electrode 5 and can intersect with addressing electrode 8 respectively.Addressing electrode 8 and the discharge space of locating to form in scan electrode 4 and the point of crossing of keeping electrode 5 11 constitute a discharge cell 12.
Fig. 2 shows the PDP electrode spread figure of PDP shown in Figure 1.The PDP electrode has m * n matrix structure.Addressing (A) electrode A 1 is set to Am along column direction, follow direction be arranged alternately scanning (Y) electrode Y1 to Yn with keep (X) electrode X1 to Xn.Discharge space 12 shown in Figure 2 is corresponding to discharge space shown in Figure 1 12.
In traditional AC PDP driving method, a frame is divided into a plurality of subframes, and comprises reset cycle, addressing period and keep the cycle.In the reset cycle, thereby addressing operation is stably carried out in the reset discharge unit.In addressing period, on panel, select the unit of conducting and the unit of conducting not, and in the unit of conducting, be to gather the wall electric charge on the selected cell.In the cycle of keeping, on selected cell, carry out the discharge that is used for the actual displayed image.
In order to carry out aforesaid operations, in the cycle of keeping, to scan electrode with keep electrode and alternately apply and keep discharge pulse, and when in reset cycle and addressing period, keeping electrode and be biased a predetermined voltage, apply reset wave and sweep waveform to scan electrode.Usually, separately be provided for the turntable driving plate of driven sweep electrode and be used to drive the drive plate of keeping of keeping electrode, this has increased cost simultaneously with regard to produced the problem that drive plate is installed on base.
Therefore, proposed a kind of method, this method is that two plates are merged into single plate, it is provided to a side of scan electrode, and extend the end keep electrode reaching the purpose that merges plate, but this merging has increased the formed impedance on the electrode of keeping in expansion.
In order to address the above problem, Korea S's publication application discloses a kind of method 10-2003-90370 number, and this method is used for providing by scan electrode driver keeps discharge pulse, and minimizes and keep electrode driver.
Fig. 3 shows the traditional PDP drive waveforms in the cycle of keeping.During the cycle of keeping, be used to keep discharge voltage Vs and-Vs alternately is applied to scanning (Y) electrode (or keeping (X) electrode), the voltage of keeping simultaneously on the electrode (or scan electrode) is maintained ground voltage.
In this example, when the situation of all discharge cells is identical, because seldom wall electric charge accumulates in the addressing period on the nonoptional unit, so when during the cycle of keeping with voltage Vs and-when Vs is applied to scan electrode, between the scan electrode of nonoptional discharge cell and addressing electrode, do not produce discharge.
Yet, since when during the cycle of keeping with voltage Vs and-unsettled wall state of charge when Vs is applied to scan electrode between the discharge cell, so between the scan electrode of nonoptional unit during the addressing period and addressing electrode, may produce misfire (misfiring).
So, in order to prevent the misfire between addressing electrode of the prior art and the scan electrode, when voltage Vs being applied to when keeping electrode, addressing electrode unsteady (float) during the cycle of keeping, or addressing voltage Va is applied to addressing electrode, thereby reduces addressing electrode and keep voltage difference between the electrode.
During positive wall electric charge accumulates in addressing period on the scan electrode of nonoptional discharge cell, and when being applied to voltage Vs on the scan electrode during the cycle of keeping, above-described prior art has reduced the pressure reduction between scan electrode and the addressing electrode.Yet, during negative wall electric charge accumulates in addressing period on the scan electrode of nonoptional discharge cell and when being applied to negative voltage-Vs on the scan electrode during the cycle of keeping, because therefore the voltage difference between scan electrode and the addressing electrode may may produce misfire greater than ignition voltage.
Summary of the invention
According to the present invention, provide a kind of drive waveforms that prevents to have the PDP misfire of the circuit board that is used for driven sweep (Y) electrode and keeps (X) electrode.
In one aspect of the invention, provide a kind of method that a frame is divided into a plurality of sons field and drives plasma display panel, plasma display panel comprises a plurality of first electrodes, second electrode and addressing (A) electrode.In at least one height field: (a) when second electrode is biased first voltage, apply reset wave to first electrode, to set up with the discharge cell that is addressed; (b) when second electrode is setovered first voltage, second voltage is applied on first electrode in proper order; (c) when second electrode is setovered first voltage, will be applied on first electrode in order to keep discharge greater than the tertiary voltage of first voltage; And (d) when second electrode is setovered first voltage, will be applied on first electrode in order to keep discharge less than the 4th voltage of first voltage.Absolute difference between first voltage and the tertiary voltage is greater than the absolute difference between first voltage and the 4th voltage.
In (c), the voltage of addressing electrode is increased to the 5th voltage, and simultaneously, in (d), the voltage of addressing electrode is maintained to the 6th voltage less than the 5th voltage.
Respectively the 5th voltage and the 6th voltage are applied on the addressing electrode, addressing electrode floats at (c) and (d).
In another aspect of this invention, provide a kind of method that drives plasma display panel, this plasma display board comprises first electrode, second electrode and addressing electrode.During the cycle of keeping, when second electrode is setovered first voltage, will be applied to first electrode greater than second voltage of first voltage; Simultaneously, when second electrode is setovered first voltage, will be applied to first electrode less than the tertiary voltage of first voltage.When second electrode is applied to first electrode, with when tertiary voltage is applied to first electrode, unsuitable as the 5th voltage of addressing electrode voltage as the 4th voltage of addressing electrode voltage.The absolute difference of the pressure between first voltage and second voltage is greater than the absolute difference between first voltage and the tertiary voltage.
The 4th voltage is greater than the 5th voltage, and addressing electrode floats.
In one side more of the present invention, provide a kind of plasma display panel with panel and driving circuit.Panel comprises a plurality of first electrodes, second electrode and addressing electrode, and driving circuit alternately applies the first positive voltage and negative second voltage to first electrode during the cycle of keeping, and the voltage of control addressing electrode when first voltage is applied to first electrode, make it greater than the voltage that second voltage ought be applied to the addressing electrode of first electrode, and the absolute value of the second negative voltage is less than the absolute value of the first positive voltage.Driving circuit is maintained to ground voltage with the voltage of second electrode, and addressing electrode floats, and during reset cycle and addressing period the voltage of second electrode is maintained to ground voltage.
Of the present invention aspect another in, a kind of method that a frame is divided into a plurality of sons and drives plasma display panel is provided, plasma display panel comprises a plurality of first electrodes, second electrode and third electrode.In at least one height field, during addressing period, select the discharge cell that is switched on, and when first electrode is setovered first voltage during the cycle of keeping, will alternately be applied to second electrode greater than second voltage of first voltage with less than the tertiary voltage of first voltage.When during the cycle of keeping tertiary voltage being applied to second electrode, the 3rd electroplax floats.The 4th voltage is applied to the third electrode of the discharge cell that will be switched on, and will be applied to during addressing period the not third electrode of the discharge cell of conducting less than the 5th voltage of the 4th voltage, and when third electrode floated, third electrode was from being used to provide the power supply of the 5th voltage to disconnect.
Description of drawings
Fig. 1 shows the skeleton view of AC PDP.
Fig. 2 shows the electrode arrangement of PDP.
Fig. 3 shows the drive waveforms of traditional PDP during the cycle of keeping.
Fig. 4 shows the PDP of the one exemplary embodiment according to the present invention.
Fig. 5 shows the PDP drive waveforms of first one exemplary embodiment according to the present invention.
What Fig. 6 showed according to the present invention first one exemplary embodiment keeps (X) electrode, scanning (Y) electrode and addressing (A) electrode, and circuit is selected in the addressing of being coupled to addressing electrode.
Fig. 7 A and 7B show the wall state of charge of the drive waveforms discharge cell of first one exemplary embodiment according to the present invention.
Fig. 8 shows the PDP drive waveforms of second one exemplary embodiment according to the present invention.
Fig. 9 shows the addressing of second one exemplary embodiment according to the present invention and selects circuit.
Figure 10 shows the PDP drive waveforms of the 3rd one exemplary embodiment according to the present invention.
Figure 11 shows the addressing of the 3rd one exemplary embodiment according to the present invention and selects circuit.
Embodiment
With reference to figure 4, comprise plasma panel 100, addressing (A) electrode driver 200, keep scanning (XY) electrode driver 320 and controller 400 according to the PDP of an one exemplary embodiment of the present invention.
Addressing electrode driver 200 slave controllers 400 receive addressing drive control signal S
A, and according to being applied to the picture signal of controller 400, will be used to select the display data signal of the discharge cell that will show to be applied to corresponding addressing electrode.
Keep scanning (XY) electrode driver 320 slave controllers 200 and receive XY electrode drive signal S
XY, and apply the signal to X and Y electrode.Controller 400 receives external image signal, generates addressing drive control signal S
AWith XY electrode drive signal S
Xy, and with signal S
AAnd S
XyDistribution is sent to addressing electrode driver 200 and keeps scanning (XY) electrode driver 320.
Describe a kind of PDP driving method below with reference to Fig. 5, it shows the drive waveforms that is applied to PDO of first one exemplary embodiment according to the present invention.Son comprises reset cycle, addressing period and keeps the cycle, and the voltage of keeping (X) electrode remains 0 volt at reset cycle, addressing period with during keeping the cycle.
During the reset cycle, voltage Vs is applied to scanning (Y) electrode, and the voltage that will rise to voltage Vset gradually is applied to scan electrode.At scan electrode and keep the faint discharge of generation between the electrode, so that forming negative wall electric charge on the scan electrode and keeping the positive wall electric charge of formation on the electrode.The voltage of scan electrode is reduced to voltage Vs, and a voltage that drops to voltage-Vnf gradually is applied to scan electrode.At scan electrode and keep between the electrode and to produce faint discharge, be formed on the negative wall electric charge on the scan electrode and be formed on the positive wall electric charge of keeping on the electrode so that eliminate major part.
During addressing period, not that bias voltage is applied to the X electrode, but the level that will be applied to the scanning voltage of Y electrode deducts the bias voltage that is applied to the X electrode during addressing period, makes the voltage of X electrode and Y electrode be maintained 0 volt, and keeps the pressure reduction between X electrode and the Y electrode.
Just, under the situation of unselected scan electrode bias voltage-VscH, voltage-VscL is applied to selected scan electrode, and positive voltage Va is applied to addressing (A) electrode, this addressing (A) electrode passes the discharge cell that will be switched on, and this discharge cell that is switched on comes from the discharge cell that is formed on the selected scan electrode.At the addressing electrode that applies voltage Va and apply and produce discharge between the scan electrode of voltage-VscL, and discharge with keeping to produce between the electrode, thereby during the cycle of keeping, be formed for keeping the wall electric charge of discharge at scan electrode.
During the cycle of keeping, will have voltage+Vs1 and-pulse of Vs2 alternately is applied to scan electrode, with at scan electrode with keep to produce between the electrode and keep discharge, and addressing electrode floats during the cycle of keeping.
Voltage+Vs1 and-the suitable each other situation of the absolute value of Vs2 under, during negative wall electric charge accumulates in addressing period on the scan electrode of unselected discharge cell, and when during the cycle of keeping, negative voltage-Vs being applied to scan electrode, because the pressure reduction between scan electrode and the addressing electrode greater than ignition voltage, produces misfire.
Therefore, as shown in Figure 5, when voltage+Vs1 and-pressure differential maintain between the Vs2 sets up voltage+Vs1, makes the absolute value of its absolute value greater than voltage-Vs2 under 2 volts situation.
With reference to figure 6 and 7, when addressing electrode during the cycle of keeping floated, the output waveform of addressing (A) electrode will be described in more detail.
What Fig. 6 represented according to the present invention first one exemplary embodiment keeps (X) electrode, scanning (Y) electrode, and circuit is selected in addressing electrode and the addressing of being coupled to addressing electrode.Fig. 7 A and 7B represent the wall state of charge according to the discharge cell of drive waveforms of according to the present invention first one exemplary embodiment.The addressing of Fig. 6 selects circuit to comprise driving transistors AH and ground transistor AL, and each transistor has body diode (bodydiode).
As shown in Figure 6, owing between scanning (Y) electrode and addressing (A) electrode, form panel capacitance, when during the cycle is being kept in the output of addressing electrode, floating, when applying voltage+Vs1 to scan electrode, the electromotive force of scan electrode increases, and the electromotive force of addressing electrode increases.When the electromotive force of addressing electrode increases to greater than voltage Va, select the body diode of the driving transistors AH of circuit (providing) by addressing as the path among Fig. 6 (1), the voltage of addressing electrode is fixed on voltage Va.Therefore, when the voltage of scan electrode increased to greater than voltage Va, the voltage of addressing electrode maintained voltage Va.
In this case, owing to accumulate in when positive wall electric charge on the scan electrode of unselected discharge cell during the addressing period, and in the time of will during the cycle of keeping, being applied on the scan electrode greater than voltage+Vs1 of voltage Vs, the voltage of addressing electrode floats with voltage Va, so the voltage Va of addressing electrode and the wall voltage Vw1 of scan electrode and be applied to scan electrode voltage+Vs1's and between difference be reduced to less than the ignition voltage Vf between addressing electrode and the scan electrode, therefore and do not produce misfire (as shown in Figure 7A).Simultaneously, because the voltage of scan electrode reduces because of the biasing of negative wall electric charge and when the wall electric charge of bearing accumulates on the scan electrode voltage+Vs1 is applied to scan electrode, do not produce misfire between scan electrode and the addressing electrode.
Further, under the situation that the output of addressing electrode during the cycle of keeping is floated, when being applied to voltage-Vs2 on the scan electrode, the electromotive force of scan electrode reduces, and the electromotive force of addressing electrode also reduces.When the electromotive force of addressing electrode is reduced to less than 0V, select the voltage of addressing electrode of body diode of the driving transistors AL of circuit to be fixed on 0V (shown in the path (2) of Fig. 6) by addressing.Therefore, when the voltage of scan electrode was reduced to less than 0V, the voltage of addressing electrode maintained 0V.
In this case, owing to work as negative wall electric charge on the scan electrode that accumulates in unselected discharge cell during the addressing period, and when during the cycle of keeping, being applied to voltage-Vs2 on the scan electrode, the absolute value of voltage-Vs2 is less than voltage Vs, so the wall pressure Vw1 of scan electrode and be applied to difference between the voltage-Vs2 of scan electrode, and therefore do not produce misfire (shown in Fig. 7 B) less than the ignition voltage Vf between addressing electrode and the scan electrode.Simultaneously, because the voltage of scan electrode reduces because of the biasing of positive wall electric charge and when positive wall electric charge accumulates on the scan electrode voltage-Vs2 is applied to scan electrode, so do not produce misfire between scan electrode and the addressing electrode.
Voltage+Vs1 is less than the ignition voltage of keeping between electrode and the scan electrode, makes during addressing period that the discharge cell of addressing does not produce to keep discharge.Equally, voltage-Vs2 must have following numerical value, and promptly voltage-Vs2 can produce discharge together with the wall electric charge of addressing discharge cell.In this case, voltage+Vs1 and-Vs2 can voltage+Vs1 and-difference between the Vs2 corresponding to traditional voltage+Vs and-controlled in difference between the Vs interval.
According to first one exemplary embodiment, addressing electrode floated during the cycle of keeping.In addition, when being applied to scan electrode during potential pulse+Vs1 is being kept the cycle, addressing electrode can float, and is different from this, and potential pulse Va can be applied directly on the addressing electrode.
In first one exemplary embodiment, when drive waveforms is applied to scan electrode, keep electrode biasing 0V, in addition, also can will keep the other voltage of electrode biasing, and revise the drive waveforms of scan electrode, make it the same with difference between other voltage and the 0V.
Further, in first one exemplary embodiment, voltage-Vs2 and+Vs1 alternately are applied to scan electrode during the cycle of keeping, in addition, the voltage of scan electrode might be increased to 0V from voltage-Vs2, voltage is increased to+Vs1 from 0V, voltage is reduced to 0V and voltage is reduced to-Vs2 from 0V from voltage+Vs1.
In first one exemplary embodiment, voltage-Vs2 and+Vs1 alternately are applied to scan electrode during the cycle of keeping, in addition, voltage Vs and-Vs alternately might be applied to scan electrode during the cycle of keeping, and when voltage-Vs was applied to scan electrode, addressing electrode floated.
Fig. 8 represents the PDP drive waveforms of second one exemplary embodiment according to the present invention.To have voltage Vs and-pulse of Vs alternately is applied to scanning (Y) electrode during the cycle of keeping, when voltage-Vs was applied to scan electrode, addressing (A) electrode was unsteady.Owing to form capacity cell by addressing electrode and scan electrode, when the voltage of scan electrode reduces and addressing electrode when floating, the voltage of addressing electrode reduces together with the voltage of scan electrode.So, when voltage-Vs is applied to the Y electrode, since the voltage between addressing electrode and the scan electrode be reduced to less than with voltage Vs and-Vs alternately is applied to the voltage under the situation of scan electrode, so avoided scan electrode and the misfire between the addressing electrode of unselected unit during the addressing period.
During being kept the cycle, voltage-Vs is applied to scan electrode, and when addressing electrode floats as shown in Figure 8, the voltage of the voltage follow scan electrode of addressing electrode reduces, and when the voltage of addressing electrode was reduced to less than ground voltage, the voltage of addressing electrode selected the body diode of the transistor AL of circuit to be fixed on ground voltage by addressing.So the voltage of addressing electrode can not be reduced to less than ground voltage, therefore, because drive waveforms can not provide drive waveforms shown in Figure 8 corresponding to the waveform of Fig. 3.
Thereby in second one exemplary embodiment, switch SW 1 is coupled between transistor AL and the ground voltage GND.Fig. 9 represents the addressing selection circuit of second one exemplary embodiment according to the present invention.Switch SW 1 is coupled to addressing to be selected between circuit and the ground voltage 0V.When during the cycle of keeping voltage-Vs being applied to scanning (Y) electrode and addressing (A) electrode and floating, switch SW 1 is closed with the voltage that cuts off addressing electrode from ground voltage 0V and the allow addressing electrode voltage according to scan electrode and is reduced.
In second one exemplary embodiment, when during the cycle of keeping voltage-Vs being applied to scan electrode, the voltage of addressing electrode is reduced to a negative voltage, thereby reduced the voltage difference between scan electrode and the addressing electrode, and then avoided the generation of the misfire of unselected discharge cell during addressing period.
According to second one exemplary embodiment since when voltage-Vs is applied to scan electrode the unsteady addressing electrode of drive waveforms, so switch SW 1 conducting repeatedly and closing, thereby increased energy consumption.Simultaneously, when voltage Vs being applied to scan electrode with the generation discharge, electronics moves to scan electrode and positive ion moves to addressing electrode.In order to show colour, apply addressing electrode with fluorescence coating, positive ion clashes into the fluorescence coating surface, has reduced the life-span of fluorescence coating.
So, referring now to Figure 10 solution to the problems described above is described, its represented a kind of according to the present invention the PDP drive waveforms of the 3rd one exemplary embodiment.In the 3rd one exemplary embodiment, when during the cycle of keeping voltage Vs being applied to scan electrode, addressing (A) electrode floats.That is, during the cycle of keeping, addressing electrode floats, and alternately have voltage Vs and-discharge pulse of keeping of Vs is applied to scan electrode.
When voltage Vs being applied to scan electrode and addressing electrode and floating, the voltage of addressing electrode increases according to the voltage of scan electrode.So the electromotive force of addressing electrode increases, after keeping discharge, a large amount of positive ions moves to keeps (X) electrode, therefore, has protected the fluorescence coating that applies addressing electrode.
According to the 3rd one exemplary embodiment, when when utilizing common addressing shown in Figure 6 to select circuit to produce drive waveforms, the voltage of addressing (A) electrode increases according to the voltage that is fixed on the addressing electrode of voltage Va.
Therefore, according to the method that is similar to the 3rd one exemplary embodiment, in order to provide voltage greater than voltage Va to addressing electrode, the path of voltage Va and addressing electrode are blocked.
Figure 11 represents the addressing selection circuit of the 3rd one exemplary embodiment according to the present invention.Except switch SW 2 is coupling between voltage Va and the addressing IC, select circuit to select circuit identical with addressing shown in Figure 9 according to the addressing of the 3rd one exemplary embodiment.
A kind of method that applies drive waveforms according to the 3rd one exemplary embodiment by addressing selection circuit is described below.
When addressing (A) electrode floated and by off switch SW1 and SW2 voltage Vs is applied to scanning (Y) electrode, the voltage of addressing electrode was increased to a positive voltage, and when voltage Vs was applied to scan electrode, the voltage of addressing electrode was reduced to a negative voltage.In this case because switch SW 1 and SW2 closes and addressing electrode intercepting 0V voltage and Va, when applying voltage Vs, apply one greater than the voltage of Va to scan electrode, when applying voltage-Vs, one voltage less than 0V is applied to scan electrode simultaneously.
As mentioned above,, eliminated and kept (X) electrode drive plate, applied drive waveforms, thereby carried out reset operation, addressing operation and keep discharge operation to scan electrode by keeping the voltage that electrode biasing one is scheduled to.Simultaneously, be applied to the scan electrode drive plate, thereby the impedance on the path is established as a normal value, apply by this path and keep discharge pulse owing to will be used to keep the pulse of discharge.
Shown in first to the 3rd one exemplary embodiment, the reset cycle that forms the son field of frame can have respectively rising cycle and decline cycle, and in addition, certain reset cycle of a little can have decline cycle respectively.
Keep the electrode predetermined voltage of in whole drive cycle, setovering, but the present invention is not limited thereto.
According to the present invention, in the time will keeping electrode and setover a constant voltage,, keep the electrode drive plate thereby removed because drive waveforms is applied to scan electrode.
Further, be applied to the absolute value of the positive voltage of keeping potential pulse of scan electrode (or keeping electrode) by control in the cycle of keeping, make its absolute value greater than negative voltage, thereby solved the misfire of unselected discharge cell in addressing period, and then reduced the voltage difference between addressing electrode and the scan electrode (or keeping electrode).
Thereby by keeping the unsteady misfire in the cycle of keeping that prevented of cycle addressing electrode, between power supply separately, increase by a switch being that addressing electrode provides addressing voltage and a non-addressing voltage and an addressing IC in addressing period, and when during addressing electrode is being kept the cycle, floating, be increased to voltage greater than addressing voltage or be reduced to less than addressing voltage.
It will be appreciated by those skilled in the art that under the situation that does not break away from the spirit or scope of the present invention, can make various modifications and variations the present invention.Therefore, in not breaking away from by additional claim and equivalent restricted portion thereof, the present invention covers its various modifications and variations.
Claims (28)
1. one kind is divided into a frame a plurality of sons and it is carried out method of driving in plasma display panel, and described plasma display panel has a plurality of first electrodes, second electrode and addressing electrode, and described method comprises:
In at least one height field,
(a) when second electrode is setovered first voltage, apply reset wave to first electrode to set up with the discharge cell that is addressed;
(b) when second electrode is setovered first voltage, order applies second voltage to first electrode;
(c) when second electrode is setovered first voltage, apply tertiary voltage greater than first voltage to first electrode to keep discharge; With
(d) when second electrode is setovered first voltage, apply less than the 4th voltage of first voltage to first electrode keeping discharge,
Wherein, the absolute difference between first voltage and the tertiary voltage is greater than the absolute difference between first voltage and the 4th voltage.
2. apply voltage to the five voltages that tertiary voltage comprises increases addressing electrode according to the process of claim 1 wherein, and apply the 4th voltage and comprise that voltage with addressing electrode maintains the 6th voltage less than the 5th voltage.
3. according to the method for claim 2, wherein apply tertiary voltage and apply the 4th voltage and comprise respectively the 5th voltage and the 6th voltage are applied to addressing electrode.
4. comprise that according to the process of claim 1 wherein to apply tertiary voltage and apply the 4th voltage addressing electrode floats.
5. according to the process of claim 1 wherein that first voltage is ground voltage.
6. according to the method for claim 5, wherein the 6th voltage is ground voltage.
7. according to the method for claim 2, wherein the 6th voltage is suitable with first voltage.
8. a driving comprises the method for the plasma display panel of a plurality of first electrodes, second electrode and addressing electrode, comprising:
During the cycle of keeping,
When second electrode is setovered first voltage, apply second voltage greater than first voltage to first electrode; And
When second electrode is setovered first voltage, apply tertiary voltage less than first voltage to first electrode,
Wherein, different as the 4th voltage of addressing electrode voltage when second voltage is applied to first electrode with the 5th voltage when tertiary voltage is applied to first electrode as addressing electrode voltage, and
Absolute difference between first voltage and second voltage is greater than the absolute difference between first voltage and the tertiary voltage.
9. method according to Claim 8, wherein the 4th voltage is greater than the 5th voltage.
10. method according to Claim 8, wherein first voltage is ground voltage.
11. method according to Claim 8, wherein addressing electrode floats.
12. method according to Claim 8, wherein during reset cycle and addressing period, second electrode is biased first voltage.
13. a plasma display panel comprises:
Panel with a plurality of first electrodes, second electrode and addressing electrode; And
Driving circuit, second voltage that is used for alternately applying the first positive voltage during the cycle of keeping and bears is to first electrode, and when the first positive voltage is applied to first electrode, the voltage of control addressing electrode, make its voltage greater than addressing electrode when second voltage that will bear is applied to first electrode, the absolute value of the second negative voltage is less than the absolute value of the first positive voltage.
14. according to the plasma display panel of claim 13, wherein driving circuit maintains ground voltage with the voltage of second electrode.
15. according to the plasma display panel of claim 13, the driving circuit addressing electrode that floats wherein.
16. according to the plasma display panel of claim 13, wherein driving circuit maintains ground voltage with the voltage of second electrode during reset cycle and addressing period.
17. a method that a frame is divided into a plurality of son and drives above-mentioned frame in plasma display panel, described plasma display panel has a plurality of first electrodes, second electrode and third electrode, and described method comprises:
In at least one height field,
During addressing period, select the discharge cell that is switched on; And
When during first electrode is being kept the cycle, being biased first voltage, alternately apply greater than second voltage of first voltage and less than the tertiary voltage of first voltage to second electrode,
Wherein, when during the cycle of keeping tertiary voltage being applied to second electrode, third electrode floats.
18. according to the method for claim 17, wherein, during addressing period, the 4th voltage is applied to the third electrode of the discharge cell that will be switched on, and will be applied to the third electrode of the discharge cell that will not arrived less than the 5th voltage of the 4th voltage, and
When third electrode floated, third electrode disconnected from the power supply that applies the 5th voltage.
19. according to the method for claim 18, wherein third electrode floated during the cycle of keeping.
20. according to the method for claim 19, wherein, when during the cycle of keeping second voltage being applied to second electrode, third electrode disconnects from the power supply that applies the 4th voltage.
21. according to the method for claim 17, wherein, during reset cycle and addressing period, first electrode is biased first voltage.
22. according to the method for claim 21, wherein first voltage is ground voltage.
23. according to the method for claim 18, wherein the 5th voltage is ground voltage.
24. a plasma display panel comprises:
Have a plurality of first electrodes, second electrode, and with the panel of the third electrode of first and second electrode crossing;
A plurality of selection circuit are used for optionally applying the third electrode of first voltage to the discharge cell that will be switched on during addressing period, and apply second voltage less than first voltage to the third electrode that will not be switched on; And
Driving circuit, be used for during the cycle of keeping, when the voltage of second electrode maintains tertiary voltage, alternately apply greater than the 4th voltage of tertiary voltage and less than the 5th voltage of tertiary voltage to first electrode, and when the 5th voltage was applied to first electrode, third electrode floated.
25. according to the plasma display panel of claim 24, wherein each selects circuit to comprise:
Be coupled in and be used to apply first power supply of first voltage and the first transistor between the third electrode; And
Be coupled in and be used to apply the second source of second voltage and the transistor seconds between the third electrode,
Wherein plasma display panel further comprises first switch that is coupled between transistor seconds and the second source, and closes when third electrode floats.
26. according to the plasma display panel of claim 25, further comprise the second switch that is coupled between the first transistor and first power supply,
Wherein keeping the unsteady third electrode of cycle drive circuit, and when applying the 4th voltage during the cycle of keeping, closing second switch to first electrode.
27. according to the plasma display panel of claim 24, wherein second electrode is biased tertiary voltage during reset cycle and addressing period.
28. according to the plasma display panel of claim 27, wherein tertiary voltage is a ground voltage.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR26174/04 | 2004-04-16 | ||
| KR1020040026174A KR100560517B1 (en) | 2004-04-16 | 2004-04-16 | Plasma display device and driving method thereof |
| KR38275/04 | 2004-05-28 |
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| Publication Number | Publication Date |
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| CN1691107A CN1691107A (en) | 2005-11-02 |
| CN100392709C true CN100392709C (en) | 2008-06-04 |
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| CNB2005100792143A Expired - Fee Related CN100392709C (en) | 2004-04-16 | 2005-04-18 | Plasma display panel and driving method thereof |
| CNB2005100788947A Expired - Fee Related CN100392708C (en) | 2004-04-16 | 2005-04-18 | Plasma display device and driving method of plasma display panel |
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| CNB2005100788947A Expired - Fee Related CN100392708C (en) | 2004-04-16 | 2005-04-18 | Plasma display device and driving method of plasma display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100740122B1 (en) | 2005-08-31 | 2007-07-16 | 삼성에스디아이 주식회사 | Plasma display and driving method thereof |
| KR100727298B1 (en) * | 2005-11-03 | 2007-06-12 | 엘지전자 주식회사 | Plasma Display Apparatus and Driving Method thereof |
| KR100784527B1 (en) * | 2006-05-26 | 2007-12-11 | 엘지전자 주식회사 | A Driving Method for Plasma Display Apparatus |
| KR100784528B1 (en) * | 2006-05-26 | 2007-12-11 | 엘지전자 주식회사 | A Driving Method for Plasma Display Apparatus |
| KR100800465B1 (en) * | 2006-06-09 | 2008-02-04 | 엘지전자 주식회사 | Plasma Display Apparatus |
| KR100793242B1 (en) | 2006-08-18 | 2008-01-10 | 엘지전자 주식회사 | Plasma display apparatus and the mathod of the apparatus |
| KR100820659B1 (en) | 2006-09-12 | 2008-04-11 | 엘지전자 주식회사 | Plasma Display Apparatus |
| KR100844822B1 (en) | 2006-09-12 | 2008-07-09 | 엘지전자 주식회사 | Plasma Display Apparatus |
| JP2008129552A (en) * | 2006-11-27 | 2008-06-05 | Hitachi Ltd | Plasma display device |
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| CN1368717A (en) * | 2001-02-05 | 2002-09-11 | 富士通日立等离子显示器股份有限公司 | Method for driving plasma display screen |
| KR20030006436A (en) * | 2001-07-12 | 2003-01-23 | 엘지전자 주식회사 | Driving Method of Plasma Display Panel |
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| JP2002215090A (en) * | 2001-01-22 | 2002-07-31 | Matsushita Electric Ind Co Ltd | Method for driving plasma display panel |
| CN1319037C (en) * | 2001-05-30 | 2007-05-30 | 松下电器产业株式会社 | Plamsa display panel display device and its driving method |
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- 2005-04-18 CN CNB2005100792143A patent/CN100392709C/en not_active Expired - Fee Related
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| US6686912B1 (en) * | 1999-06-30 | 2004-02-03 | Fujitsu Limited | Driving apparatus and method, plasma display apparatus, and power supply circuit for plasma display panel |
| CN1368717A (en) * | 2001-02-05 | 2002-09-11 | 富士通日立等离子显示器股份有限公司 | Method for driving plasma display screen |
| KR20030006436A (en) * | 2001-07-12 | 2003-01-23 | 엘지전자 주식회사 | Driving Method of Plasma Display Panel |
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| WO2004032108A1 (en) * | 2002-10-02 | 2004-04-15 | Fujitsu Hitachi Plasma Display Limited | Drive circuit and drive method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100392708C (en) | 2008-06-04 |
| KR20050100943A (en) | 2005-10-20 |
| CN1691107A (en) | 2005-11-02 |
| KR100560517B1 (en) | 2006-03-14 |
| CN1691106A (en) | 2005-11-02 |
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