CN1272759C - Drive method for driving plasma display face plate - Google Patents
Drive method for driving plasma display face plate Download PDFInfo
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- CN1272759C CN1272759C CN 02132270 CN02132270A CN1272759C CN 1272759 C CN1272759 C CN 1272759C CN 02132270 CN02132270 CN 02132270 CN 02132270 A CN02132270 A CN 02132270A CN 1272759 C CN1272759 C CN 1272759C
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Abstract
The present invention relates to a drive method for driving a plasma display panel. The drive method comprises the following steps: firstly, first reset pulse, first excitation pulse, second reset pulse and pixel signals corresponding to display units are output orderly; subsequently, a drive circuit of a first display unit orderly outputs maintain pulse, third reset pulse and fourth reset pulse, wherein the first display unit is one part of the display units; finally, a drive circuit of a second display unit outputs maintain pulse, wherein the second display unit is the other part of the display units.
Description
Technical field
The present invention is relevant for a kind of driving method in order to driving display, and particularly relevant for a kind of in order to drive the driving method of Plasmia indicating panel.
Background technology
People are more and more higher to the requirement of acousto-optic service.With the display is example, and known cathode-ray tube (CRT) (Cathode Ray Tube, CRT) display has that bulky, radiation is serious, large scale screen edge frame distortion distortion ... etc. problem.After following Digital Television started broadcasting, known cathode ray tube screen with the analog form video picture will little by little be eliminated.Replace, will have large scale, wide visual angle, high definition and show the characteristic of full-color visualization capabilities Plasmia indicating panel (PlasmaDisplay Panel, PDP).
Please refer to Fig. 1, it represents the stereographic map of known Plasmia indicating panel structure.Plasmia indicating panel is made of prebasal plate 102 and metacoxal plate 108.A plurality ofly keep electrode (sustainingelectrode) X and a plurality of scan electrode (scanning electrode) Y is set in parallel on the front glass base version 102 alternately in pairs.Keep electrode X and scan electrode degree Y by 104 coverings of dielectric layer (dielectriclayer).104 protective seams that are made of magnesium oxide 106 of dielectric layer cover, and keep electrode X, scan electrode Y and dielectric layer 104 in order to protection.In addition, a plurality of address electrode A (addressing electrode) are arranged on the metacoxal plate 108 abreast, and are covered by dielectric layer 116.Wherein, address electrode A be provided with direction with keep electrode X and scan electrode Y that direction is set is orthogonal.Spaced walls (rib) 112 is arranged on the metacoxal plate 108 along the direction parallel with address electrode A, and screen photosphere 110 is between two adjacent spaced walls 112.
Cavity between prebasal plate 102 and the metacoxal plate 108 is discharge space (discharge space), wherein has been full of the discharge gas (discharge gas) that is mixed by neon and xenon.Keep at every pair on the prebasal plate 102 that corresponding address electrode A limits a display unit on electrode X and scan electrode Y and the metacoxal plate 108.Therefore, then a plurality of electrode X, scan electrode Y and address electrode A of keeping can limit a plurality of display units of arranging with array (matrix) form on Plasmia indicating panel.Keep the alternating current that driving circuit that electrode X, scan electrode Y and address electrode A formed can apply high voltagehigh frequency to discharge space, make the gas in the discharge space be provoked into excited ion (dischargeion) constantly and emit ultraviolet light.Screen photosphere 110 will be emitted visible light behind the ultraviolet light that absorbs specific wavelength.
Please refer to Fig. 2 A～2B, it is represented to be known sequential chart in order to the drive signal that drives display unit.Display unit is at each frame time section (frame period) display frame.Each frame time section all is made up of a plurality of subframe time period (subframe period).Driving circuit can apply drive signal in display unit in each subframe time period, and is luminous or not luminous in order to drive display unit.Each subframe time period all can be divided into reset time period (reset period) T1, addressing time period (address period) T2 and the section of holding time (sustain period) T3 three phases in regular turn.When resetting time period T1, scan electrode Y is output reset pulse (erase pulse) P earlier
Y1, keep near the wall electric charge of accumulating electrode X and the scan electrode Y (wallcharge) in a last sub-frame time section in order to remove.Afterwards, apply excitation pulse (priming pulse) again, with so that the gas of discharge space is excited freely again, forming the luminous required excited ion of display unit, and make also on the Plasmia indicating panel that the state of excited ion reaches unanimity in each display unit.Wherein, applying the form of excitation pulse can be by keeping electrode X output HIGH voltage excitation pulse P
X2, shown in Fig. 2 A, or keep electrode X and the different excitation pulse P of scan electrode Y difference output polarity
X2, P
Y2Shown in Fig. 2 B.In addition, it is square wave that excitation pulse does not limit, and also can be waveform and reset pulse P
Y1Identical sawtooth wave.At last, scan electrode Y exports a reset pulse P
Y3, in order to remove the residual excited ion in the display unit.When addressing time period T2, address electrode A output and the corresponding picture element signal of display unit make the display unit Discharge illuminating.In the section of holding time T3, because the memory effect of excited ion (memory effect), so keep electrode X and scan electrode Y as long as alternatively pulse (sustain pulse) is kept in output, will constantly carry out gas discharge in the display unit and produce excited ion, and continue to send visible light.Please refer to Fig. 3 A, when it was illustrated in the section of holding time, the ideal of keeping electrode X and scan electrode Y output was kept the sequential chart of pulse.Keep and be square wave on the pulse theory.When keeping electrode X and one of them output of scan electrode Y and keep pulse, another electrode is output signal not then, as shown in Figure 3A.
Long more in the luminous time of each frame time section when display unit, the brightness of display unit will be bright more.For display unit, it is just big more to can be considered its load (load).When Plasmia indicating panel showed a high-brghtness picture images, for display units all on the display panel, its load summation can be very big.In this manual, claim that this kind high-brghtness picture images is heavily loaded image.Can be seen from the foregoing, when the section of holding time, keep electrode X and scan electrode Y and can mutual output keep pulse.Therefore, can cause the power attenuation of Plasmia indicating panel.When Plasmia indicating panel is exported heavily loaded image, can produce bigger power attenuation.And also can produce serious electromagnetic interference (EMI) (electro-magneticinterference, problem EMI).Known method in order to the power attenuation that reduces Plasmia indicating panel is, when the section of holding time, keeps electrode X and scan electrode Y and need all alternatively not export in each cycle and keep pulse.Certain following period of time in the section of holding time, two electrodes are not exported any signal, to reduce power attenuation.In this manual, claim that this section period is section standby time (dummy time).When the load of Plasmia indicating panel is big more, standby time, section will be long more, and it is just few more at the number of keeping pulse of the section of holding time output to keep electrode X and scan electrode Y, to reduce the power attenuation of Plasmia indicating panel.But, standby time Duan Yuechang, the brightness meeting of display unit is dark more.In addition, when Plasmia indicating panel is exported heavily loaded image, can produce serious electromagnetic interference (EMI) (electro-magnetic interference, problem EMI).
Please refer to Fig. 3 B, when Plasmia indicating panel showed a heavily loaded image, the pulse meeting of keeping of keeping electrode X output produced depression (notch), makes the value of keeping pulse can't be promoted to the noble potential of expection immediately by electronegative potential.Simultaneously, in theory not the scan electrode Y of output signal also can export another depression.Keep depression waveform that electrode X and scan electrode Y exported respectively as among Fig. 3 B, shown in the part that solid line was enclosed.When the section of holding time, keep electrode X and scan electrode Y and alternatively export and keep pulse.So when Plasmia indicating panel is exported heavily loaded image, keep electrode X and scan electrode Y and alternatively export the pulse of keeping with depression, simultaneously, another electrode of output signal then can not exported depression in theory.The load of Plasmia indicating panel is big more, and the depression signal also can increase thereupon.In this manual, above-mentioned phenomenon is called as dishing effect.The influence of dishing effect article on plasma display panel is that the voltage power supply scope of drive signal can diminish.And the load of Plasmia indicating panel is big more, and the voltage power supply scope is just more little.
Summary of the invention
In view of this, purpose of the present invention is exactly to provide a kind of in order to drive the driving method of Plasmia indicating panel, can improve the dishing effect of keeping pulse, enlarging the voltage power supply scope of drive signal.And improve the electromagnetic interference problem of Plasmia indicating panel, reduce the time span of section standby time, improve the brightness of display panel.
According to purpose of the present invention, propose a kind of in order to drive the driving method of Plasmia indicating panel, wherein, described ion display panel comprises a plurality of display units, each display unit has one drive circuit, luminous in order to drive this display unit according to this driving method, this driving circuit comprises keeps electrode, one scan electrode and an address electrode, and this driving method comprises the following steps: to export one first reset pulse; Export one first excitation pulse; Export one second reset pulse; Export a picture element signal, wherein, this picture element signal is corresponding with this display unit; The described driving circuit of a plurality of first display units is respectively exported a plurality of pulses of keeping, and wherein, described first display unit is the part of described display unit; The described driving circuit of described first display unit is respectively exported one the 3rd reset pulse; After output the 3rd reset pulse, the described driving circuit of described first display unit is respectively exported one second excitation pulse; The described driving circuit of described first display unit is respectively exported a cleaning politics, economics, organization, and ideology and is removed pulse; And the described driving circuit of a plurality of second display units respectively exports a plurality of pulses of keeping, and wherein, described second display unit is another part of described display unit.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 represents the stereographic map of known Plasmia indicating panel structure.
Fig. 2 A～2B represents known sequential chart in order to the drive signal that drives display unit.
Fig. 3 A represents to keep under the ideal state oscillogram of keeping pulse of electrode and scan electrode output.
Fig. 3 B represents when display unit shows heavily loaded image, and the oscillogram of keeping pulse of dishing effect takes place.
Fig. 4 is first kind of sequential chart in order to the drive signal of driving display unit representing according to the preferred embodiments of the present invention.
Fig. 5 is second kind of sequential chart in order to the drive signal of driving display unit representing according to the preferred embodiments of the present invention.
Fig. 6 is the third sequential chart in order to the drive signal of driving display unit of representing according to the preferred embodiments of the present invention.
The drawing reference numeral explanation
102: prebasal plate
104: dielectric layer
106: protective seam
108: metacoxal plate
110: the screen photosphere
112: spaced walls
Embodiment
Characteristics of the present invention are that when the section of holding time, the driving circuit of all display units not output is simultaneously kept pulse, to reduce the load that is caused when Plasmia indicating panel is exported heavily loaded image.Therefore, the dishing effect that the driving circuit that then can improve display unit is caused when the heavily loaded image of output is to improve the voltage power supply scope of drive signal.In addition, also can improve the problem of the electromagnetic interference (EMI) of driving circuit, and improve the brightness of display frame.
Fig. 4 is first kind of sequential chart in order to the drive signal of driving display unit representing according to the preferred embodiments of the present invention.Each display unit all has one drive circuit on the Plasmia indicating panel, and in order to apply drive signal in display unit in each subframe time period (subframe period), it is luminous or not luminous to drive display unit.Please refer to Fig. 4, in the present embodiment, each subframe time period all can be divided into reset time period (reset period) T1, first addressing time period (addressperiod) T2, first section of holding time (sustain period) T3, checkout time section (eraseperiod) T4, the second addressing time period T5, six stages of second section of the holding time T6 in regular turn.The drive signal that driving circuit is exported when resetting time period T1 is identical with known driving method disclosed above, repeats no more in this.In Fig. 4, excitation pulse is respectively by keeping electrode X and the different sawtooth wave of scan electrode Y output polarity.But the present invention is not as limit.Excitation pulse also can be square wave, shown in Fig. 2 A and 2B.And the form that applies excitation pulse can be only by keeping the excitation pulse of electrode X output HIGH voltage, shown in Fig. 2 A.
The present invention and known practice difference are that in the present invention, the display unit of Plasmia indicating panel is divided into many groups, and the driving circuit of each group display unit is kept pulse in different time sections output.In the present embodiment, the display unit of Plasmia indicating panel is divided into two groups of first display unit, second display units, and first display unit and second display unit are alternately arranged on the Plasmia indicating panel.But the grouping number of display unit and the set-up mode on Plasmia indicating panel be not as limit.
Afterwards, when the first addressing time period T2, the address electrode A that is arranged at first display unit can export corresponding picture element signal, makes the display unit Discharge illuminating of winning.First display unit only is the part of display unit all on the Plasmia indicating panel.The time span of the first addressing time period T2 in the present embodiment is shorter than the time span of the addressing time period in the known driving method.
Afterwards, when first section of the holding time T3, be arranged at keeping electrode X and scan electrode Y and can alternatively exporting and keep pulse of first display unit, make the display unit of winning luminous constantly.The time span of first section of the holding time T3 in the present embodiment is shorter than the time span of the section of holding time in the known driving method.
Afterwards, when checkout time section T4, be arranged at first display unit keep electrode X and scan electrode Y can export reset pulse and excitation pulse.Its signal waveform is identical with the reset pulse and the excitation pulse of exporting at the time period T1 that resets with order, and please reference description above voluntarily repeats no more in this.Different with the time period T1 that resets is that when checkout time section T4, only the driving circuit of first display unit is exported reset pulse and kept pulse.
Afterwards, when the second addressing time period T5, the address electrode A that is arranged at second display unit can export corresponding picture element signal, makes the second display unit Discharge illuminating.Second display unit only is the part of display unit all on the Plasmia indicating panel.The time span of the second addressing time period T5 in the present embodiment is shorter than the time span of the addressing time period in the known driving method.
At last, when second section of the holding time T6, be arranged at keeping electrode X and scan electrode Y and can alternatively exporting and keep pulse of second display unit, make second display unit luminous constantly.The time span of second section of the holding time T6 in the present embodiment is shorter than the time span of the section of holding time in the known driving method.
The driving circuit of first display unit and second display unit is kept pulse at first section of the holding time T3 and second section of holding time T6 output respectively.So can reduce the load of Plasmia indicating panel effectively.When exporting heavily loaded image according to driving method driving Plasmia indicating panel proposed by the invention, the dishing effect of keeping pulse can obtain the improvement of certain degree.Therefore, then can enlarge the voltage power supply scope of drive signal, and promote the image display quality of Plasmia indicating panel.Another advantage that pulse is kept in each the comfortable different section of the holding time output of the driving circuit of different display units is to improve the problem of the electromagnetic interference (EMI) of Plasmia indicating panel.In addition, driving method proposed by the invention has two section of holding time T3 and T6.Therefore, then can reduce the time span of section standby time, improve the brightness of display frame.
Fig. 5 is second kind of sequential chart in order to the drive signal of driving display unit representing according to the preferred embodiments of the present invention.Be with drive signal difference shown in Figure 4, when checkout time section T4, keep electrode X and scan electrode Y does not export excitation pulse.And the polarity of two reset pulses that scan electrode Y is exported is opposite.Therefore, then can reduce the time span of checkout time section T4, and reduce the immediate current and the power attenuation of driving circuit.In addition, also can reduce the number of the essential electric crystal of driving circuit.
Fig. 6 is the third sequential chart in order to the drive signal of driving display unit of representing according to the preferred embodiments of the present invention.Fig. 4 and Fig. 5 represent that the driving circuit of first display unit and second display unit is respectively at the first addressing time period T2 and the second addressing time period T5 output pixel signal.Fig. 6 then represents all display units, no matter first display unit or second display unit, its driving circuit is imported picture element signal in the corresponding display unit when same addressing time period T2.Afterwards, the driving circuit of first display unit and second display unit is kept pulse respectively at first section of the holding time T3 and second section of holding time T5 output again, and the driving circuit of first display unit is checkout time section T4 output reset pulse between first section of the holding time T3 and second section of the holding time T5, as shown in Figure 5, or reset pulse and excitation pulse, as shown in Figure 4.Therefore, then can simplify the form and the order of drive signal proposed by the invention.
The invention effect
The disclosed a kind of driving method in order to the driving Plasmia indicating panel of the above embodiment of the present invention can improve the dishing effect of keeping pulse, enlarges the voltage power supply scope of drive signal.In addition, also can improve the electromagnetic interference problem of Plasmia indicating panel, and reduce the time span of section standby time, the brightness that improves display frame.
In sum; though the present invention with a preferred embodiment openly as above; right its is not in order to limit the present invention; any those skilled in the art; under the situation that does not break away from design of the present invention and scope; can carry out various changes and improvement, so the present invention is as the criterion with the protection domain that claim was defined that proposes.
Claims (11)
1. one kind in order to drive the driving method of Plasmia indicating panel, wherein, described Plasmia indicating panel comprises a plurality of display units, each display unit has one drive circuit, luminous in order to drive this display unit according to this driving method, this driving circuit comprises keeps electrode, one scan electrode and an address electrode, and this driving method comprises the following steps:
Export one first reset pulse;
Export one first excitation pulse;
Export one second reset pulse;
Export a picture element signal, wherein, this picture element signal is corresponding with this display unit;
The described driving circuit of a plurality of first display units is respectively exported a plurality of pulses of keeping, and wherein, described first display unit is the part of described display unit;
The described driving circuit of described first display unit is respectively exported one the 3rd reset pulse;
After output the 3rd reset pulse, the described driving circuit of described first display unit is respectively exported one second excitation pulse;
The described driving circuit of described first display unit is respectively exported a cleaning politics, economics, organization, and ideology and is removed pulse; And
The described driving circuit of a plurality of second display units is respectively exported a plurality of pulses of keeping, and wherein, described second display unit is another part of described display unit.
2. driving method as claimed in claim 1, wherein, this first reset pulse, this second reset pulse, the 3rd reset pulse and this cleaning politics, economics, organization, and ideology remove pulse by this scan electrode output.
3. driving method as claimed in claim 1, wherein, this first excitation pulse is kept electrode and the output of this scan electrode by this respectively.
4. driving method as claimed in claim 3, wherein, this this first excitation pulse of keeping electrode output is opposite with the polarity of this first excitation pulse of this scan electrode output.
5. driving method as claimed in claim 1, wherein, the polarity that the 3rd reset pulse and this cleaning politics, economics, organization, and ideology remove pulse is opposite.
6. driving method as claimed in claim 1, wherein, this second excitation pulse is kept electrode and the output of this scan electrode by this respectively.
7. driving method as claimed in claim 6, wherein, this this second excitation pulse of keeping electrode output is opposite with the polarity of this second excitation pulse of this scan electrode output.
8. driving method as claimed in claim 1, wherein, the polarity that the 3rd reset pulse and this cleaning politics, economics, organization, and ideology remove pulse is identical.
9. driving method as claimed in claim 1, wherein, this picture element signal is by this address electrode output.
10. driving method as claimed in claim 1 wherein, more comprises the following steps: in order to the method for exporting this picture element signal
This driving circuit of each first display unit is respectively exported this picture element signal, and wherein, this picture element signal is corresponding with this first display unit; And
This driving circuit of each second display unit is respectively exported this picture element signal, and wherein, this picture element signal is corresponding with this second display unit.
11. driving method as claimed in claim 1 wherein, is describedly kept pulse and is alternately kept the output of electrode and this scan electrode by this respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02132270 CN1272759C (en) | 2002-09-04 | 2002-09-04 | Drive method for driving plasma display face plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02132270 CN1272759C (en) | 2002-09-04 | 2002-09-04 | Drive method for driving plasma display face plate |
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| CN1480916A CN1480916A (en) | 2004-03-10 |
| CN1272759C true CN1272759C (en) | 2006-08-30 |
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| CN 02132270 Expired - Fee Related CN1272759C (en) | 2002-09-04 | 2002-09-04 | Drive method for driving plasma display face plate |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100726634B1 (en) | 2004-04-27 | 2007-06-12 | 엘지전자 주식회사 | Driving Method of Plasma Display Panel |
| KR100793063B1 (en) * | 2005-08-30 | 2008-01-10 | 엘지전자 주식회사 | Apparatus for Plasma Display and Driving Method for Plasma Display Apparatus |
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