CN1157705C - Drive method of plasma display panel and its circuit - Google Patents
Drive method of plasma display panel and its circuit Download PDFInfo
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- CN1157705C CN1157705C CNB011024410A CN01102441A CN1157705C CN 1157705 C CN1157705 C CN 1157705C CN B011024410 A CNB011024410 A CN B011024410A CN 01102441 A CN01102441 A CN 01102441A CN 1157705 C CN1157705 C CN 1157705C
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Abstract
The present invention relates to a driving method for a plasma display panel. Firstly, in an addressing period, a scanning pulse is inputted to a scanning electrode, and a data pulse is inputted to a data electrode in a selective mode; then, in a sustaining discharge period, a first and a second sustaining discharge pulses with different phases are respectively applied to a first and a second sustaining electrodes. A third discharge pulse is applied to the scanning pulse so as to sustain image data, and first discharge current and second discharge current are respectively generated on the first and the second sustaining electrodes. The present invention can increase the operational range of the plasma display panel, and can reduce the interference of electromagnetic radiation.
Description
The present invention relates to a kind of driving method of plasma display panel and circuit thereof, and particularly relate to a kind of driving method and circuit thereof that reduces the voltage sag of keeping electrode of plasma display.
Please refer to Fig. 1, it illustrated is the sectional view of the structure of traditional AC type plasma display panel.Have on the inner surface of front glass substrate 102 many to long strip type keep electrode (sustain electrode) X and scan electrode (scan electrode) Y, it disposes in pairs in the mode that replaces, and, parallel to each other.Keep electrode X and scan electrode Y and respectively comprise a transparency electrode (transparent electrode) 106 and one auxiliary electrode (bus electrode) 108, and auxiliary electrode 108 is in order to increase the electric conductivity of transparency electrode 106.Covered an insulation course (dielectric layer) 110 on transparency electrode 106 and the auxiliary electrode 108, insulation course 110 is in order to produce wall electric charge (wall charge), then is to have covered a protective seam 112 on the insulation course 110.
Be formed on the inner surface of lower glass substrate 104 with the data electrode 114 (address electrode) of keeping electrode X and scan electrode Y quadrature.Data electrode 114 is covered by fluorescence coating 116 and spaced walls (rib) (not being shown among the figure).Spaced walls with keep electrode X quadrature, and discharge space 118 is to be defined between protective seam 112 and the fluorescence coating 116, and discharge space 118 is to be discharge gas (discharge gas), for example is inert gas, fill up.
Please refer to Fig. 2, it illustrated is the synoptic diagram of YXYX type electrode spread of the traditional plasma display panel of Fig. 1.In Fig. 2, keeping electrode X and scan electrode Y is to arrange in staggered mode, that is to say with scan electrode Y (1), keeps electrode X (1), scan electrode Y (2) and keep the tactic of electrode X (2).Data electrode A (1), A (2), A (3) and A (4) then are to arrange with the mode of keeping electrode X and scan electrode Y quadrature.Keep electrode X and scan electrode Y and data electrode A and intersect part, define optionally conducting and discharge cell (discharge element) E1 that closes.
Please refer to Fig. 3, it illustrated is the synoptic diagram of YXXY type electrode spread of the traditional plasma display panel of Fig. 1.In Fig. 3, keep electrode X and scan electrode Y and be tactic with YXXY, that is to say with scan electrode Y (1), keep electrode X (1) and keep the tactic of electrode X (2) and scan electrode Y (2).Data electrode A (1), A (2), A (3), and A (4) then be to arrange with the mode of keeping electrode X and scan electrode Y quadrature.Keep electrode X and scan electrode Y and data electrode A and intersect part, define optionally conducting and the discharge cell E2 that closes.
Please refer to Fig. 4, what it illustrated is that tradition is in order to drive the plasma display panel driving oscillogram of Fig. 2 or Fig. 3.For the AC plasma volumetric display, the drive waveforms of each son field (subfield) comprises three periods: reset stage (reset period) P1, addressing period (addressperiod) P2 and keep the discharge period (sustain discharge period) P3.Including individual electrode X (1)～X (n), n scan electrode Y (the 1)～Y (n) that keeps of n with plasma scope below is that example is illustrated with m data electrode A (1)～A (m).
Each pixel writes the correctness of data when guaranteeing addressing, be to keeping the firing pulse (priming pulse) 402 of electrode X (1)～about 340V of X (n) input amplitude in reset stage P1, and to scan electrode Y (1)～Y (n) input eliminate pulse (erase pulse) 404, replacement pulse (resetpulse) 406, with firing pulse 408.Above-mentioned pulse is that the wall electric charge in all discharge cells is reset to specific energy rank, and the free charge in the discharge space 118 is reduced, and is beneficial to the discharging action of ensuing addressing period P2.
In addressing period P2, be respectively in regular turn to scan electrode Y (1)～Y (n) input one load voltage (scanning impulse 410 approximately-180V).And, according to image data to display, come optionally data pulse 412, make the predetermined discharge cell of lighting produce the wall electric charge, to keep inidial charge when discharging as keeping the period P3 that discharges to data electrode A S (1)～A (m) input one positive voltage (about 60V).Keep electrode X (1)～X (n) and then maintain positive voltage V1 (about 60V).Scan electrode Y (1)～Y (n) during input scan pulse 410, does not then maintain a negative voltage V2 (approximately-90V).Wherein, keep electrode X and maintain noble potential by making, be subjected to the discharge cell of data electrode A (1)～A (m) control can be bright by the selectivity electricity, the wall electric charge will result from the discharge cell to display.
In keeping discharge period P3, because the wall electric charge in the discharge cell has memory effect (memory effect), so as long as to scan electrode Y (1)～Y (n) with keep the anti-phase each other ac voltage signal of electrode X (1)～X (n) input, then the discharge cell of being lighted in addressing period P2 will constantly produce the gas discharge action, and send ultraviolet light constantly.Ultraviolet light is got to after the fluorescence coating 116, just produces the appreciable visible light of user.Wherein, inputing to the ac voltage signal of keeping electrode X (1)～X (n) and scan electrode Y (1)～Y (n) is between 180V and 0V, keeps the square-wave signal that discharge pulse 414 is formed by a plurality of.
Please refer to Fig. 5, what it illustrated is that tradition is in order to drive the plasma display panel driving circuit block diagram of Fig. 2 or Fig. 3.Fig. 5 is that to equal 8 with the n value be that example describes.Scanning is kept and is included a replacement/sweep circuit 504 and a Y holding circuit 506 in the driving circuit (Y driving circuit) 502.Replacement/sweep circuit 504 is in order to resulting between reset stage P1 and the addressing period P2, the required magnitude of voltage that offers scan electrode Y, for example be 180V ,-90V or-180V.Y holding circuit 506 then is to keep between discharge period P3 in order to result from, and the required magnitude of voltage that offers scan electrode Y for example is 180V and 0V.Keep the control of the control signal (not being shown among the figure) of driving circuit (Y driving circuit) by scanning, scanning keep driving circuit (Y driving circuit) 502 provide scan electrode Y in addressing period P2 with keep discharge period P3 required drive signal, and, drive signal is inputed in the scan control circuit (ScanningIC) 510 by multiplexer 508.All scan electrode Y (1)～Y (8) all electrically connects with scan control circuit (Scanning IC) 510.Scan control circuit (Scanning IC) 510 exports drive signal to respectively among scan electrode Y (1)～Y (8), that is to say, in addressing period P2, scan control circuit (ScanningIC) the 510th inputs to scanning impulse 410 among scan electrode Y (1)～Y (8) in order, and in keeping discharge period P3,510 of scan control circuits (Scanning IC) apply a plurality of discharge pulses 414 of keeping to scan electrode Y (1)～Y (8) simultaneously.
On the other hand, all be coupled to X holding circuit 512 after keeping the equal short circuit of electrode X, X holding circuit 512 is to keep the required drive waveforms of electrode X in order to provide.Wherein, X holding circuit 512 is made up of a plurality of transistor respectively with Y holding circuit 506.
Please refer to Fig. 6, what it illustrated is in keeping of Fig. 4 discharged period P3, keeps the voltage and the oscillogram of keeping the electric current I X of electrode X of electrode X and scan electrode Y.In keeping discharge period P3, when will keep discharge pulse 414 put on keep on electrode X and the scan electrode Y after, the discharge cell of plasma display will be kept discharge.At this moment, in the middle of the process of keeping discharge, will have big electric current I ds and flow through and keep electrode X, scan electrode Y, X holding circuit 512 and Y holding circuit 506.Since with keep X holding circuit 512 that electrode X is connected with scan electrode Y and Y holding circuit 506 and formed by a plurality of transistor, resistance value Rds will make the magnitude of voltage generation moment pressure drop Δ V=Ids*Rds that keeps electrode X and scan electrode Y in these were transistorized.The moment pressure drop Δ V that keeps electrode X and scan electrode Y will make the voltage waveform of keeping electrode X and scan electrode Y produce voltage sag (notch) 602.Wherein, under general situation, moment pressure drop Δ V is most probably up to about 60V.Because the generation of voltage sag 602,, keep waveform distortion and cause with making that to be presented in the waveform of keeping the voltage waveform on electrode X and the scan electrode Y and putting on the ac voltage signal of keeping electrode X and scan electrode Y different.And, but will make the opereating specification (margin) of plasma display diminish.In addition, because the big change in voltage of moment, voltage sag 602 will make the electromagnetic interference of plasma display more become serious.
In No. the 6072449th, United States Patent (USP), a kind of method that drives plasma display is disclosed, can reduce the value of above-mentioned moment pressure drop Δ V.Use voltage and the current waveform of keeping electrode X and scan electrode Y that said method produced to be illustrated among Fig. 7.Disclosed driving method is in No. the 6072449th, the United States Patent (USP): at first, scan electrode Y being divided into two groups, is respectively the first scan electrode YI and the second scan electrode Y2.Then, respectively to the first scan electrode Y1 different with the second scan electrode Y2 input phase keep discharge pulse.So, keep the displacement current (displacement current) 702 and discharge current (discharge current) 704 that electrode X and the first scan electrode Y1 are produced with making, and to keep the displacement current 706 and the discharge current 708 that are produced on the electrode X and the second scan electrode Y2 and take place in different time points.So, diminish in keeping the discharge current 704 that produced on the electrode X and 708 amplitude, make and reduce in the value of the moment pressure drop Δ V that keeps voltage sag 710 and 712, voltage sag 714 and voltage sag 716 on electrode X, scan electrode Y1 and the scan electrode Y2.
Though above-mentioned driving method can be so that keeping the size of the voltage sag of electrode X reduces, its employed circuit is quite complicated and expends cost.Please refer to Fig. 8, it illustrated is driving circuit block scheme in order to the plasma scope of the oscillogram that produces Fig. 7.Because it is different with the drive waveforms of the second scan electrode Y2 to input to the first scan electrode Y1, so must use different driven sweep circuit to come respectively drive waveforms to be inputed among the first scan electrode Y1 and the second scan electrode Y2.In Fig. 8, the first scan electrode Y1 is coupled to driven sweep circuit 810, the second scan electrode Y2 to be coupled to driven sweep circuit 820.Because replacement/sweep circuit and holding circuit are made up of a plurality of transistor, it can't be shared by different driven sweep circuit.So different scan control circuit (Scanning IC) then must be coupled to different scanning and keep driving circuit (Y driving circuit), the side is produced different drive waveforms.So in Fig. 8, scan control circuit (Scanning IC) 810 and 820 is to be coupled to scanning via multiplexer 808 and 818 respectively to keep driving circuit (Y driving circuit) 802 and 812.Wherein, scanning is kept driving circuit (Y driving circuit) 802 and is comprised a replacement/sweep circuit 804 and a Y holding circuit 806, and scanning is kept driving circuit (Y driving circuit) 812 and then comprised a replacement/sweep circuit 814 and a Y holding circuit 816.And scanning to keep driving circuit (Y driving circuit) 802 and 812 be to receive control signal C_Y1 and the C_Y2 that is transmitted by phase shift control circuit 822 respectively, with the generation phase place different keep discharge pulse.Very and, phase shift control circuit 822 also must transmit control signal C_X1 to X holding circuit 824, so that holding circuit 806,816 and 824 is able to clock pulse is synchronous.
In view of this, the object of the present invention is to provide a kind of driving method and circuit thereof that reduces the voltage sag of keeping electrode of plasma display.The present invention will make voltage sag diminish effectively, but to increase the opereating specification (margin) of plasma display.The more important thing is, use driving method of the present invention can reduce the interference of electromagnetic radiation significantly.And the present invention only need use simple circuit configuration, can realize above-mentioned purpose.
According to purpose of the present invention, a kind of driving method of plasma display panel is proposed.Plasma display is to have one first to keep electrode, one second and keep electrode, one scan electrode and a data electrode.Scan electrode and first is kept electrode and second and is kept electrode and be arranged in parallel, and data electrode then is to keep the electrode quadrature with scanning.Driving method of the present invention comprises: at first, provide an addressing period.In the addressing period, be to the pulse of scan electrode input one scan, and optionally the data electrode imported a data pulse, to write an image data.Afterwards, provide one to keep the discharge period.In keeping in the discharge period, be to apply respectively to have first of out of phase and keep discharge pulse and second and keep discharge pulse and keep electrode X1 in first and go up to reach second and keep on the electrode X2.And apply one the 3rd discharge pulse to scan electrode, to keep image data.And make first to keep that electrode X1 goes up and second keep and produce one first discharge current and one second discharge current on the electrode X2 respectively.Wherein, after producing first discharge current, postpone a retardation period, the side produces second discharge current, to reduce the moment consumed power of plasma display.
According to another object of the present invention, a kind of plasma display panel driving circuit is proposed.Plasma display has one first to be kept electrode, one second and keeps electrode, one scan electrode and a data electrode.Scan electrode is and first keeps electrode and second and keep electrode and be arranged in parallel.Data electrode is to keep the electrode quadrature with scanning.Driving circuit of the present invention comprises: one scan is kept driving circuit (Y driving circuit), one scan control circuit (Scanning IC) one the one X holding circuit and one the 2nd an X holding circuit and a phase shift control circuit.Scan control circuit (Scanning IC) is to be coupled to scan electrode respectively and driving circuit (Y driving circuit) is kept in scanning.The one X holding circuit is to be coupled to first to keep electrode, and the 2nd X holding circuit is to be coupled to second to keep electrode.And the phase shift control circuit is to be coupled to an X holding circuit and the 2nd X holding circuit respectively, in order to control an X holding circuit and the 2nd X holding circuit, make different one first the keeping discharge pulse and one second and keep discharge pulse of output phase respectively of an X holding circuit and the 2nd X holding circuit.
Below in conjunction with accompanying drawing shown in the embodiment, above-mentioned purpose of the present invention, feature and advantage are done further ocean describe in detail bright.
Fig. 1 illustrates is the sectional view of the structure of traditional AC type plasma display panel;
Fig. 2 illustrates is the synoptic diagram of YXYX type electrode spread of the traditional plasma display panel of Fig. 1;
Fig. 3 illustrates is the synoptic diagram of YXXY type electrode spread of the traditional plasma display panel of Fig. 1;
What Fig. 4 illustrated is in order to drive the plasma display panel driving oscillogram of Fig. 2 or Fig. 3 in tradition;
What Fig. 5 illustrated is in order to drive the plasma display panel driving circuit block diagram of Fig. 2 or Fig. 3 in tradition;
What Fig. 6 illustrated is in keeping of Fig. 4 discharged period P3, keeps the voltage and the oscillogram of keeping the electric current of electrode X of electrode X and scan electrode Y;
What Fig. 7 illustrated is United States Patent (USP) voltage and the current waveform figure of keeping electrode X and scan electrode Y that No. 6072449 disclosed driving method of plasma display panel produced;
Fig. 8 illustrates is plasma display panel driving circuit block diagram in order to the oscillogram that produces Fig. 7;
Fig. 9 illustrates is voltage and current waveform figure according to the keeping electrode X1, keep electrode X2 of a preferred embodiment of the present invention, the first scan electrode Y1 and the second scan electrode Y2;
What Figure 10 illustrated is according to preferred embodiment of the present invention, is used in the plasma display panel driving circuit block diagram of the electrode spread with YXYX type;
What Figure 11 illustrated is according to preferred embodiment of the present invention, is used in the plasma display panel driving circuit block diagram of the electrode spread with YXXY type;
What Figure 12 A illustrated is the partial circuit structural drawing of the traditional X holding circuit among Fig. 8;
Figure 12 B illustrates is the partial circuit structural drawing of the X holding circuit in the driving circuit of Figure 10;
What Figure 13 illustrated is the part enlarged drawing of the oscillogram among Fig. 9;
Figure 14 illustrates is to keep discharge waveform figure according to the second embodiment of the present invention;
Figure 15 illustrates is that the first scan electrode Y1 and the second scan electrode Y2 are coupled to plasma display panel driving circuit block diagram behind the different scan control circuit (Scanning IC) respectively.
Main spirit of the present invention is, will keep electrode X and be distinguished into first and keep electrode X1 and second and keep electrode X2.Scan electrode Y then includes the first scan electrode Y1 and the second scan electrode Y2.The first scan electrode Y1 corresponds to first to keep electrode X1, and the second scan electrode Y2 corresponds to second to keep electrode X2.In keeping discharge period P3, apply respectively and have first of out of phase and keep discharge pulse (discharge sustaining pulse) and second and keep discharge pulse and keep that electrode X1 goes up and second keep on the electrode X2 in first, and apply a third dimension and hold on discharge pulse to the first scan electrode Y1 and the second scan electrode Y2.So that first keep that electrode X1 goes up and second keep and produce one first discharge current (Discharge Current) and one second discharge current on the electrode X2 respectively.Wherein, after producing first discharge current, more postpone a retardation period, begin to produce second discharge current just now.So, the moment consumed power of plasma display will reduce, and makes to win and keep the size that electrode X1, second keeps the voltage sag (notch) on electrode X2, the first scan electrode Y1 and the second scan electrode Y2 and lower.
Further, driving method of the present invention is in keeping discharge period P3, first of two outs of phase are kept discharge pulse and second keep discharge pulse and be applied to first group respectively and keep electrode X1 and second group and keep among the electrode X2, and provide a third dimension to hold discharge pulse to the first scan electrode Y1 and the second scan electrode Y2.
Because the present invention is divided into first and keeps electrode X1 and second and keep electrode X2 keeping electrode X, divide two groups to get final product so only need to keep the pairing X holding circuit of electrode X.And because the complexity of X holding circuit is to keep driving circuit (Y driving circuit) and scan control circuit (Scanning IC) less than scanning, so the complexity of driving circuit used in the present invention is the traditional driving circuit much smaller than as shown in Figure 8.Therefore, the cost of driving circuit of the present invention is also much smaller than the required cost of traditional driving circuit of Fig. 8.
Please refer to Fig. 9, it illustrated is voltage and current waveform figure according to the keeping electrode X1, keep electrode X2 of a preferred embodiment of the present invention, the first scan electrode Y1 and the second scan electrode Y2.For realizing purpose of the present invention, respectively to the first scan electrode Y1, the second scan electrode Y2, first keep electrode X1, second keep electrode X2 input keep discharge signal IN_Y1, keep discharge signal IN_Y2, keep discharge signal IN_X1, with keep discharge signal IN_X2.At this moment, it is shown in voltage signal VY1, VY2, VX1, VX2 that the first scan electrode Y1, the second scan electrode Y2, first keep the change in voltage that electrode X1, second keeps on the electrode X2, and its electric current changes then shown in current signal IY1, IY2, IX1, IX2.
In Fig. 9, put on first and keep that electrode X1 goes up and second keep first on the electrode X2 and keep discharge pulse 902 and second and keep discharge pulse 904 and have different phase places.Also promptly, first rising edge (rising edge) 906 and second of keeping discharge pulse 902 rising edge 908 of keeping discharge pulse 904 is to produce respectively at different time points; It can lay respectively at the third dimension that inputs to the first scan electrode Y1 and the second scan electrode Y2 simultaneously hold before the negative edge (fallingedge) 912 of discharge pulse 910 with negative edge 912 after.
When first keeps electrode X1 and the first scan electrode Y1 change in voltage is arranged, will produce first displacement current (displacement current) 922 and 924; And when first keeps between the electrode X1 and the first scan electrode Y1 voltage difference greater than plasma discharge critical value, will produce first discharge current 926.And when second keeps electrode X2 and the second scan electrode Y2 change in voltage is arranged, will produce second displacement current 932 and 934; And when second keeps between the electrode X2 and the second scan electrode Y2 voltage difference greater than this plasma discharge critical value, will produce second discharge current 936.
To keep the phase place of discharge pulse 904 different because first keeps discharge pulse 902 and second, and win discharge current 926 and second discharge current 936 are produced in different time points.That is to say, after producing first discharge current 926, postpone a retardation period D1, begin to produce second discharge current 936 just now.So, the moment consumed power of plasma display will reduce, and makes the group of winning keep electrode X1, second group to keep voltage sag (notch) 940,942,946 on electrode X2, the first scan electrode Y1 and the second scan electrode Y2 and 948 size attenuating.So, electromagnetic interference (EMI) also will decrease.
Please refer to Figure 10, what it illustrated is according to preferred embodiment of the present invention, is used in the plasma display panel driving circuit block diagram of the electrode spread with YXYX type.Keep electrode X and comprise that first keeps electrode X1 and second and keep electrode X2, first keeps electrode X1 and second, and to keep electrode X2 be interconnected.Figure 10 keeps electrode X1 with first to comprise that first keeps electrode X1 (1), X1 (2), X1 (3), X1 (4), and second keep electrode X2 and comprise and second keep electrode X2 (1), X2 (2), X2 (3), describe for example with X2 (4).First keeps electrode X1 is coupled to an X holding circuit 1002, and second keeps electrode X2 and be coupled to the 2nd X holding circuit 1004.The one X holding circuit 1002 and the 2nd X holding circuit 1004 are in order to provide first to keep electrode X1 and second and keep the required drive waveforms of electrode X2 respectively.In addition, one phase shift control circuit (Phase Shift Controller) the 1006th is coupled to an X holding circuit 1002 and the 2nd X holding circuit 1004 respectively, with so that an X holding circuit 1002 and the 2nd X holding circuit 1004 produce different first the keeping and put pulse 902 and second and keep discharge pulse 904 of phase place respectively.
In addition, the first scan electrode Y1 and the second scan electrode Y2 all are coupled to one scan control circuit (Scanning IC) 1008, and scan control circuit (Scanning IC) the 1008th is coupled to and scans a multiplexer 1010 of keeping in the driving circuit (Y driving circuit) 1012.Driving circuit (Y driving circuit) the 1012nd is kept in scanning, includes a replacement/sweep circuit 1014 and Y holding circuit 1016.Replacement/sweep circuit 1014 in order to result from reset stage P1 and addressing period P2 during, the required magnitude of voltage that offers the first scan electrode Y1 and the second scan electrode Y2, for example be 180V, 90V or-180V.Y holding circuit 1016 then be in order to result from the discharge period P3 during, the required magnitude of voltage that offers the first scan electrode Y1 and the second scan electrode Y2 for example is 180V and 0V.
Keep the control of the control signal (not being shown among the figure) of driving circuit (Y driving circuit) 1012 by scanning, driving circuit (Y driving circuit) the 1012nd is kept in scanning, can provide the first scan electrode Y1 and the second scan electrode Y2 in addressing period P2 with keep the required different driving signal of period P3 that discharges, and, drive signal is inputed in the scan control circuit (Scanning IC) 1008 in regular turn or simultaneously by multiplexer 1010.
In addressing period P2, scan control circuit (Scanning IC) the 1008th exports drive signal to respectively among the first scan electrode Y1 (1)～Y1 (4) and the second scan electrode Y2 (the 1)～Y2 (4) in regular turn.Also promptly, scan control circuit (Scanning IC) the 1008th inputs to scanning impulse 410 among the first scan electrode Y1 (1)～Y1 (4) and the second scan electrode Y2 (the 1)～Y2 (4) in order.And in keeping discharge period P3,1008 of scan control circuits (Scanning IC) apply a plurality of discharge pulses 910 of keeping to the first scan electrode Y1 (1)～Y1 (4) and the second scan electrode Y2 (1)～Y2 (4) simultaneously.
Please refer to Figure 11, what it illustrated is according to preferred embodiment of the present invention, is used in the plasma display panel driving circuit block diagram of the electrode spread with YXXY type.Keep electrode X and comprise that first keeps electrode X1 and second and keep electrode X2.Figure 11 also keeps electrode X1 with first and comprises that first keeps electrode X1 (1), X1 (2), X1 (3) and X1 (4), and second keep electrode X2 comprise second keep electrode X2 (1), X2 (2), X2 (3) is illustrated for example with X2 (4).First keeps electrode X1 and second keeps electrode X2 and keeps electrode X1 (1) and X1 (2), second with first to keep electrode X2 (1) and X2 (2), first and keep the series arrangement that electrode X1 (3) and X1 (4) and second keep electrode X2 (3) and X2 (4).Similarly, first keeps electrode is coupled to X holding circuit 1102, the second and keeps electrode, and second keeps electrode X2 is coupled to X holding circuit 1104, and phase shift control circuit 1106 then is coupled to an X holding circuit 1002 and the 2nd X holding circuit 1004 respectively.
Please refer to Figure 12 A～12B, wherein, what Figure 12 A was illustrated is the partial circuit structural drawing of the traditional X holding circuit 824 among Fig. 8, is the partial circuit structural drawing of the X holding circuit 1002 in the driving circuit of Figure 10 and Figure 12 B illustrates.In Figure 12 A, traditional holding circuit 824 must have the ability to provide all required electric currents of electrode X of keeping, so traditional holding circuit 824 must use 4 transistor Q1, Q2, Q3 and Q4 at least, the side is conformed with institute and asks.These transistors are the control of distinguishing suspension control signal S1, S2, S3, reaching S4.For using the transistor of same specification, an X holding circuit 1002 of the present invention is then because half of the number of keeping electrode X that first number of keeping electrode X1 that is driven is only driven for traditional holding circuit 824 kept electrode X1 so only need two transistor Q1 ' and Q2 ' can provide enough electric currents to drive first.So, in driving circuit shown in Figure 10, though the present invention needs an X holding circuit 1002 and the 2nd X holding circuit 1004 simultaneously, however add up this two X holding circuit 1002 and 1004 transistor size summation be with the required transistor size of traditional X holding circuit 824 be the same.So use driving circuit of the present invention can't increase the transistor size of keeping electrode X in order to driving.Transistor Q1 ' and Q2 ' be the control of suspension control signal S1 ' and S2 ' respectively then.
In like manner, the X holding circuit 1102 among Figure 11 and 1104 transistor size summation are the same with the required transistor size of traditional X holding circuit 824 also.So use the driving circuit that Figure 11 illustrated also can not increase the transistor size of keeping electrode X in order to driving.
Please refer to Figure 13, what it illustrated is the part enlarged drawing of the oscillogram among Fig. 9.To input to the first scan electrode Y1, the second scan electrode Y2, first below and keep that electrode X1 and second keeps the keeping discharge signal IN_Y1 and IN_Y2, keep discharge signal IN_X1, keep discharge signal IN_X2 and current signal IX1, IX2 of electrode X2, IY1, IY2 are further described.
At first, between time section T 1, make first to keep the potential change that electrode X1 produces forward, and make second voltage of keeping electrode X2, the first scan electrode Y1 and the second scan electrode Y2 keep definite value in fact.Wherein, voltage is kept definite value in fact and is meant that keeping the voltage signal that electrode X2, the first scan electrode Y1 and the second scan electrode Y2 imported to second is maintained at definite value.And the potential change of forward for example is to rise to high levels (180V) by low level (0V).
Then, between time section T 2, make the first scan electrode Y1 and the second scan electrode Y2 produce the potential change of negative sense simultaneously, and make first to keep the voltage that electrode X1 and second keeps electrode X2 and keep definite value in fact.Wherein, the potential change of negative sense for example is to drop to low level (0V) by high levels (180V).After time section T 2, because keeping voltage difference between the electrode X1, the first scan electrode Y1 and first becomes greatly, so excite the first scan electrode Y1 and first to keep plasma between electrode X1 to produce first discharge current 926 above the plasma discharge critical value.
Then, between time section T 3, make second to keep the potential change that electrode X2 produces forward, and the voltage that makes the first scan electrode Y1, the second scan electrode Y2 and first keep electrode X1 is kept definite value in fact.After time section T 3, because the voltage difference that the second scan electrode Y2 and second keeps between the electrode X2 becomes greatly, so excite the second scan electrode Y2 and second to keep plasma between electrode X2 to produce second discharge current 936.So, just can in first keep first discharge current 926 on the electrode X1 and produce after, postpone one first retardation period D1 after, begin to produce second discharge current 936 just now.
In general, first discharge current 926 as shown in figure 13 and second discharge current 936, wherein, first discharge current 926 occurs in time section T 2 0.5～1 μ s afterwards approximately; Second discharge current 936 occurs in time section T 3 0.5～1 μ s afterwards approximately.
Afterwards, between time section T 4, make first to keep the potential change that electrode X1 produces negative sense, and the voltage that makes the first scan electrode Y1, the second scan electrode Y2 and second keep electrode X2 is kept definite value in fact.
Then, between time section T 5, make the first scan electrode Y1 and the second scan electrode Y2 produce the potential change of forward simultaneously, and make first to keep the voltage that electrode X1 and second keeps electrode X2 and keep definite value in fact.
Then, between time section T 6, make second to keep the potential change that electrode X2 produces negative sense, and make first voltage of keeping electrode X1, the first scan electrode Y1 and the second scan electrode Y2 keep definite value in fact.
So, just can make first to keep electrode X and go up to produce the 3rd discharge current 928 anti-phase with first discharge current 926, and after postponing one second retardation period D2, this second is kept and produces one four discharge current 938 anti-phase with second discharge current 936 on the electrode.
In general, the 3rd discharge current 928 as shown in figure 13 and the 4th discharge current 938, wherein the 3rd discharge current 928 occurs in time section T 5 0.5～1 μ s afterwards approximately; The 4th discharge current 938 occurs in time section T 6 0.5～1 μ s afterwards approximately.
Please refer to Figure 14, it illustrated is to keep discharge waveform figure according to the second embodiment of the present invention.In Figure 14, within time district T1 ', T2 ' and T3 ', first keep electrode X1, second keep electrode X2, the first scan electrode Y1, with the change in voltage situation of the second scan electrode Y2 be with Figure 13 in time section T 1, T2, identical with T3, do not give unnecessary details in advance in this.And between time section T 4 ', make second to keep the potential change that electrode X2 produces negative sense, and the voltage that makes the first scan electrode Y1, the second scan electrode Y2 and first keep electrode X1 is kept definite value in fact.
Then, between time section T 5 ', make the first scan electrode Y1 and the second scan electrode Y2 produce the potential change of forward, and make first to keep the voltage that electrode X1 and second keeps electrode X2 and keep definite value in fact.
Then, between time section T 6 ', make first to keep the potential change that electrode X1 produces negative sense, and make second voltage of keeping electrode X2, the first scan electrode Y1 and the second scan electrode Y2 keep definite value in fact.So, just, can make second to keep electrode X2 and go up to produce three discharge current 928 anti-phase with first discharge current 926.And after postponing the second retardation period D2, first keeps electrode X1 goes up and produces one four discharge current 938 anti-phase with second discharge current 936.
Though it is that example is illustrated that the present invention is coupled to scan control circuit (Scanning IC) 1008 or 1108 simultaneously with the first scan electrode Y1 and the second scan electrode Y1 and the second scan electrode Y2, yet the present invention is not limited to this.Further, the first scan electrode Y1 of the present invention can also be coupled to different scan control circuit (Scanning IC) respectively with the second scan electrode Y2.Please refer to Figure 15, it illustrated is that the first scan electrode Y1 and the second scan electrode Y2 are coupled to plasma display panel driving circuit block diagram behind the different scan control circuit (Scanning IC) respectively.First keeps electrode X1 is coupled to X holding circuit 1502, and second keeps electrode X2 and be coupled to X holding circuit 1504.The first scan electrode Y1 is coupled to scan control circuit (Scanning IC) 1508, and the second scan electrode Y2 is coupled to scan control circuit (ScanningIC) 1518.Scan control circuit (Scanning IC) 1508 and 1518 is to be coupled to respectively to scan the multiplexer of keeping in the driving circuit (Y driving circuit) 1512 and 1,522 1510 and 1520.Scanning is kept driving circuit (Y driving circuit) 1512 and is included replacement/sweep circuit 1514 and Y holding circuit 1516, and scanning is kept driving circuit (Y driving circuit) 1522 and then included replacement/sweep circuit 1524 and Y holding circuit 1526.1506 of phase shift control circuits are coupled to X holding circuit 1502, X holding circuit 1504, driving circuit (Y driving circuit) 1512 is kept in scanning and driving circuit (Y driving circuit) 1522 is kept in scanning.Scan control circuit (Scanning IC) 1508 will export with scan control circuit (Scanning IC) 1518 that the third dimension is held discharge pulse and fourth dimension is held discharge pulse.Wherein, the third dimension hold discharge pulse and fourth dimension hold the phase place of discharge pulse can be identical, also can be different.
Further, according to spirit of the present invention, keep electrode X and also can be divided into the N group, wherein N is greater than 2.Import the phase place difference of keeping discharge pulse of keeping electrode X of N group so far as long as allow, can reach purpose of the present invention.
The driving method of the voltage sag of keeping electrode (notch) of the disclosed minimizing plasma display of the above embodiment of the present invention and circuit thereof can make voltage sag (notch) diminish effectively, but, reduce the interference of electromagnetic radiation to increase the opereating specification of plasma display.And the present invention only need use simple circuit configuration, can achieve the above object.
In sum; though the present invention with a preferred embodiments openly as above; but it is not in order to limit the present invention; any the those of ordinary skill that professional domain is interior; without departing from the spirit and scope of the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is when being as the criterion with the determined scope of claim.
Claims (11)
1, a kind of driving method of plasma display panel, this plasma display panel has one first to be kept electrode, one second and keeps electrode, one scan electrode and a data electrode, this scan electrode is first to keep electrode and this second and keep electrode and be arranged in parallel with this, this data electrode is to keep the electrode quadrature with this scanning, and this driving method comprises:
One addressing period was provided, to this scan electrode input one scan pulse, and optionally this data electrode is imported a data pulse, to write an image data; And
Provide one to keep the discharge period, apply respectively and have first of out of phase and keep discharge pulse and second and keep discharge pulse and keep on the electrode and second keep on the electrode in first, and apply one the 3rd discharge pulse to this scan electrode, to keep this image data, and this first is kept on the electrode and this second is kept and produce one first discharge current and one second discharge current on the electrode respectively, wherein, after producing this first discharge current, be to postpone a retardation period, the side produces this second discharge current, to reduce the moment consumed power of this plasma display panel.
2, driving method of plasma display panel as claimed in claim 1, it is characterized in that: described scan electrode comprises one first scan electrode, one second scan electrode, this first scan electrode, this second scan electrode, this first keeps electrode and this second to keep electrode is to be arranged in parallel, this data electrode is to keep the electrode quadrature with this first scanning, and this driving method further comprises:
Apply one the 3rd discharge pulse and one the 4th discharge pulse respectively on this first scan electrode and this second scan electrode, to keep this image data.
3, driving method as claimed in claim 2, wherein to hold the phase place that discharge pulse and this fourth dimension hold discharge pulse identical for this third dimension.
4, driving method as claimed in claim 2, wherein this third dimension is held discharge pulse and this fourth dimension to hold the phase place of discharge pulse different.
5, a kind of driving method in keeping interdischarge interval of plasma display, this plasma display panel comprise that one scan electrode, one first keeps electrode, one second and keep electrode, and this driving method comprises the following steps:
In very first time section, make this first keep the potential change that electrode produces forward, and make this second voltage of keeping electrode and this scan electrode keep definite value in fact;
In the second time section, make this scan electrode produce the potential change of negative sense, and make this first keep electrode and this second voltage of keeping electrode is kept definite value in fact; And
In the 3rd time section T 3, make this second keep the potential change that electrode produces forward, and make this scan electrode and this first voltage of keeping electrode keep definite value in fact;
So, just can in this first keep on the electrode produce one first discharge current after, postponed for one first retardation period, this second keeps Fang Yu and produces one second discharge current on the electrode.
6, driving method as claimed in claim 5, this driving method also comprises the following steps:
In the 4th time section, make this first keep the potential change that electrode produces negative sense, and make this scan electrode and this second voltage of keeping electrode keep definite value in fact;
In the 5th time section, make this scan electrode produce the potential change of forward, and make this first keep electrode and this second voltage of keeping electrode is kept definite value in fact; And
In the 6th time section, make this second keep the potential change that electrode produces negative sense, and make this first voltage of keeping electrode and this scan electrode keep definite value in fact;
So, just can make this first keep on the electrode and to produce and one the 3rd anti-phase discharge current of this first discharge current, and in postponing one second retardation after the period, second keep on the electrode and produce and one the 4th anti-phase discharge current of this second discharge current in this.
7, driving method as claimed in claim 5, this driving method also comprises the following steps:
In the 4th time section, make this second keep the potential change that electrode produces negative sense, and make this scan electrode and this first voltage of keeping electrode keep definite value in fact;
In the 5th time section, make this scan electrode produce the potential change of forward, and make this first keep electrode and this second voltage of keeping electrode is kept definite value in fact; And
In the 6th time section, make this first keep the potential change that electrode produces negative sense, and make this second voltage of keeping electrode and this scan electrode keep definite value in fact;
So, just can make this second keep on the electrode and to produce and one the 3rd anti-phase discharge current of this first discharge current, and in postponing one second retardation after the period, first keep on the electrode and produce and one the 4th anti-phase discharge current of this second discharge current in this.
8, a kind of plasma display panel driving circuit, this plasma display panel has one first and keeps electrode, one second keeps electrode, an one scan electrode and a data electrode, this scan electrode is first to keep electrode and this second and keep electrode and be arranged in parallel with this, this data electrode is to keep the electrode quadrature with this scanning, and this driving circuit comprises:
It is the Y driving circuit that one scan is kept driving circuit;
The one scan control circuit is to be coupled to this scan electrode and this scanning respectively to keep driving circuit be the Y driving circuit;
One the one X holding circuit and one the 2nd X holding circuit, an X holding circuit are to be coupled to this first to keep electrode, and the 2nd X holding circuit is to be coupled to this second to keep electrode; And
One phase shift control circuit, be to be coupled to an X holding circuit and the 2nd X holding circuit respectively, in order to control an X holding circuit and the 2nd X holding circuit, make different one first the keeping discharge pulse and one second and keep discharge pulse of output phase respectively of an X holding circuit and the 2nd X holding circuit.
9, a kind of plasma display panel driving circuit, this plasma display panel has one first to be kept electrode, one second and keeps electrode, one first scan electrode, one second scan electrode and a data electrode, this scan electrode is first to keep electrode and this second and keep electrode and be arranged in parallel with this, this data electrode is to keep the electrode quadrature with this first scanning, and this driving circuit comprises:
It is the Y driving circuit and one second scan that to keep driving circuit be the Y driving circuit that driving circuit is kept in one first scanning;
One first scan control circuit and one second scan control circuit, the firstth scan control circuit is to be coupled to this first scan electrode and this first scanning respectively to keep driving circuit be the Y driving circuit, and this second scanning to keep driving circuit be to be coupled to this second scan electrode respectively second to scan that to keep driving circuit be the Y driving circuit with this;
One the one X holding circuit and one the 2nd X holding circuit, an X holding circuit are to be coupled to this first to keep electrode, and the 2nd X holding circuit is to be coupled to this second to keep electrode; And
One phase shift control circuit, be to be coupled to an X holding circuit and the 2nd X holding circuit respectively, in order to control an X holding circuit and the 2nd X holding circuit, make different one first the keeping discharge pulse and one second and keep discharge pulse of output phase respectively of an X holding circuit and the 2nd X holding circuit.
10, driving circuit as claimed in claim 9, wherein, this phase shift control circuit also is coupled to this first scanning to keep driving circuit is the Y driving circuit with this and second scans that to keep driving circuit be the Y driving circuit, makes this first scan control circuit third dimension different with this second scan control circuit output phase hold discharge pulse and a fourth dimension is held discharge pulse.
11, driving circuit as claimed in claim 9, wherein, this phase shift control circuit also is coupled to this first scanning to keep driving circuit is the Y driving circuit with this and second scans that to keep driving circuit be the Y driving circuit, makes this first scan control circuit third dimension identical with this second scan control circuit output phase hold discharge pulse and a fourth dimension is held discharge pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011024410A CN1157705C (en) | 2001-02-02 | 2001-02-02 | Drive method of plasma display panel and its circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011024410A CN1157705C (en) | 2001-02-02 | 2001-02-02 | Drive method of plasma display panel and its circuit |
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| Publication Number | Publication Date |
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| CN1368715A CN1368715A (en) | 2002-09-11 |
| CN1157705C true CN1157705C (en) | 2004-07-14 |
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| CNB011024410A Expired - Fee Related CN1157705C (en) | 2001-02-02 | 2001-02-02 | Drive method of plasma display panel and its circuit |
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| CN100389445C (en) * | 2004-10-18 | 2008-05-21 | 南京Lg同创彩色显示***有限责任公司 | Plasma display screen driving method and device |
| KR100774908B1 (en) * | 2004-11-16 | 2007-11-09 | 엘지전자 주식회사 | Driving Method for Plasma Display Panel |
| KR100774875B1 (en) * | 2004-11-16 | 2007-11-08 | 엘지전자 주식회사 | Driving Method for Plasma Display Panel |
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