CN100383846C - Driving method and device for plasma displaying device - Google Patents
Driving method and device for plasma displaying device Download PDFInfo
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- CN100383846C CN100383846C CNB2004100843564A CN200410084356A CN100383846C CN 100383846 C CN100383846 C CN 100383846C CN B2004100843564 A CNB2004100843564 A CN B2004100843564A CN 200410084356 A CN200410084356 A CN 200410084356A CN 100383846 C CN100383846 C CN 100383846C
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Abstract
The present invention relates to the technique of a plasma display driving method and the driving device thereof, which can prevent the phenomena of error discharge or over discharge. The plasma display driving method and the driving device thereof can supply a plurality of auxiliary pulses to a first electrode in maintaining period to ensure uniform distribution of wall electric charges on a partition wall, and can supply maintaining pulses to a second and a third electrodes after the auxiliary pulses are formed.
Description
[technical field]
The present invention is the technology of relevant plasma display, especially misplaces electricity or overdischarge phenomenon about preventing, and can improve the plasma display dirving method of image quality and the technology of device thereof.
[background technology]
Recently, the various flat-screen CRT monitors that can reduce the weight and volume of cathode-ray tube (CRT) (Cathode Ray Tube) just are being able to extensive exploitation.In flat-screen CRT monitor, LCD (Liquid CrystalDisplay:LCD), Field Emission Display (Field Emission Display:FED), plasma display (Plasma Display Panel: hereinafter to be referred as " PDP ") and electroluminescence (Electro-Luminescence:EL) display are arranged.
At this, PDP can simply make the product of big template as the display element that utilizes gas discharge principle.As shown in Figure 1, be provided with 3 electrodes among the above-mentioned PDP, the 3 electrode AC creeping discharge type PDP that drive by alternating voltage are PDP products that tool is represented meaning.
As shown in Figure 1, the discharge cell among the PDP is made up of the electric coupling of keeping that is located at the address electrode 12X on the lower basal plate 18 and be located on the upper substrate 10.That is, the discharge cell among the PDP is by scan electrode 12Y with keep electrode 12Z and form.
Be provided with on the lower basal plate 18 of address electrode 12X, but be provided with the lower dielectric matter layer 22 of overlay address electrode 12X, also be provided with partition wall 24 on it.The surface of lower dielectric matter layer 22 and partition wall 24 is provided with fluorophor 20.As shown in Figure 2, partition wall 24 is shape of stripes or nearest close-shaped as among Fig. 3 for improving that luminescence efficiency develops.But discharge space is distinguished on partition wall 24 physical properties ground, in case the ultraviolet ray discharge cell adjacent with visible rays that generates during with discharge exposes.The ultraviolet ray that fluorophor 20 generates during by gas discharge is activated and moves, and generates the visible rays of one of red, green, blue or green color.On being located at/discharge space of discharge cell between lower basal plate 10,18 and the partition wall 24 in, will inject nonactive mixed gas.
Be located at and keep electric coupling 12Y on the upper substrate 10, comprise transparency electrode 12a and bus electrode 12b among the 12Z respectively, and intersect to form with address electrode 12X.
Keep electric coupling 12Y being provided with, on the upper substrate 10 of 12Z, be provided with to cover and keep electric coupling 12Y, the upper dielectric matter layer 14 of 12Z also is provided with diaphragm 16 on it.The wall electric charge that generates when upper dielectric matter layer 14 can be put aside discharge.Diaphragm 116 is made up of magnesium oxide (MgO) usually, and it can prevent when plasma discharge, because of reactive sputtering causes the phenomenon that upper dielectric matter layer 13 is impaired, and can improve the emission efficiency of secondary electron.
Discharge cell with said structure characteristics, selected by the subtend discharge of address electrode 12X and scanning/keep between the electrode 12Y, and, keep electric discharge phenomena by keeping the surface-discharge between electric coupling 12Y, the 12Z.In above-mentioned discharge cell, the ultraviolet ray that generates when discharging by keeping makes fluorophor 20 luminous, and makes visible light emit to the outside, unit.In view of the above, by keep during the keeping of discharge or during this period in discharge time embody grade.
Recently aspect PDP, by Japanese patent gazette 2001-135238 number, can in discharge gas, compare with Ne, the concentration of Xe is increased by 8%, improve luminescence efficiency with this.Below with reference to table 1, the merits and demerits when increasing Xe concentration.
[table 1]
| Advantage when increasing Xe concentration | Shortcoming when increasing Xe concentration |
| Brightness increases | Sparking voltage rises and the discharge delay phenomenon increases |
| Efficient increases | The temperature of display board rises |
| Color temperature increase etc. | After image etc. appears |
As can be seen from Table 1, the concentration that increases Xe has many advantages really, but also has corresponding shortcoming.For example, the increase of discharge delay phenomenon is difficult to realize high-speed driving, and hinders the raising of resolution increase, brightness increase and the display quality of PDP.
In addition,, will increase the discharge delay phenomenon, and can cause and misplace electricity or overdischarge phenomenon in case the wall CHARGE DISTRIBUTION on the partition wall 24 is rocked.That is, in the wall electric charge on partition wall 24, partition wall generally includes the bigger materials of heritability such as Pb, Zr, TiO3 for 24 li, and its amount is many again, so when distribution is rocked, can cause the above-mentioned phenomenons such as electricity or overdischarge that misplace, this phenomenon is verified by test.To this, 4～accompanying drawing 7 is elaborated with reference to the accompanying drawings.
Shown in Fig. 4 a, the distribution of supposing the wall electric charge does not cause and misplaces electricity or overdischarge phenomenon and regular picture, so shown in Fig. 4 b, scanning impulse (scp) will be supplied among the scan electrode 12Y, and when data pulse is supplied to address electrode 12X, can generate scanning impulse (scp), through behind the desirable discharge delay time (Δ t), cause the address electric discharge phenomena then.Shown in Fig. 5 a and Fig. 5 b, under above-mentioned ideal conditions, if the distribution of the wall electric charge 42 of the wall electric charge 41 of upper plate and lower plate is rocked, and its amount reduces gradually, will as shown in Figure 6 discharge delay time be increased to Δ dt1.But shown in Fig. 7 a,, will increase to the Δ dt2 among Fig. 7 b discharge time, when this phenomenon is comparatively serious, just can cause electric discharge phenomena, or in unappropriated unit, cause discharge if the distribution of the wall electric charge 43 on the partition wall 24 is rocked.
[summary of the invention]
Therefore, the present invention aims to provide one can prevent to misplace electricity or overdischarge, and can improve the PDP driving method and the device of image quality.
To achieve these goals, the PDP driving method in the embodiment of the invention is made up of following two steps:
That is, during keeping, supply a plurality of satellite pulses, the step of rocking with the wall CHARGE DISTRIBUTION that prevents on the partition wall to the 1st electrode; After generating satellite pulse, keep the step of pulse to the 2nd electrode and the 3rd electrode supply.
In above-mentioned driving method, also comprise following two steps: promptly,, tentatively change the step of waveform to the 2nd electrode supply at reseting period; During the address, to the 2nd electrode supply scanning impulse, and to the 1st electrode supply data pulse, with the step of selected cell.
In addition, satellite pulse is set by the voltage of data pulse.
PDP drive unit in the embodiment of the invention is made up of following structure: promptly, during keeping, supply a plurality of satellite pulses to the 1st electrode, the data driver of the wall CHARGE DISTRIBUTION stabilization of rocking with the wall CHARGE DISTRIBUTION that prevents on the partition wall; After generating satellite pulse, keep the scanner driver of pulse to the 2nd electrode supply, keep the driver of keeping of pulse to the 3rd electrode supply.
In the above-mentioned drive unit, also be included in the oxide film of film forming on the partition wall.
As mentioned above, PDP driving method and device thereof among the present invention, before keeping pulse to the address electrode supply, unnecessary wall electric charge on the partition wall of supply stabilization pulse, and minimizing earlier is to reduce the degree of rocking of wall CHARGE DISTRIBUTION to greatest extent.By the present invention, can effectively prevent to misplace electricity or overdischarge, and can improve image quality.
[description of drawings]
Fig. 1 is the schematic cross-section of conventional formula 3 electrode plasma displays;
Fig. 2 is the synoptic diagram that the partition wall among Fig. 1 is shape of stripes;
Fig. 3 is the synoptic diagram that the partition wall among Fig. 1 is closed state;
Fig. 4 a is comparatively desirable wall CHARGE DISTRIBUTION schematic cross-section;
The waveform synoptic diagram of the light output phenomenon that Fig. 4 b takes place when being the electric discharge phenomena that generate on the wall CHARGE DISTRIBUTION in Fig. 4 a and discharge;
Fig. 5 a is on the wall CHARGE DISTRIBUTION in Fig. 4 a, the sectional view when last wooden partition electric charge rocks;
Fig. 5 b is on the wall CHARGE DISTRIBUTION in Fig. 4 a, the schematic cross-section when following wooden partition electric charge rocks;
The waveform synoptic diagram of the light output phenomenon that Fig. 6 takes place when being the electric discharge phenomena that generate on the wall CHARGE DISTRIBUTION in Fig. 5 a and Fig. 5 b and discharge;
Fig. 7 a is on the wall CHARGE DISTRIBUTION in Fig. 4 a, the sectional view when cutting off the wall electric charge and rocking;
The waveform synoptic diagram of the light output phenomenon that Fig. 7 b takes place when being the electric discharge phenomena that generate on the wall CHARGE DISTRIBUTION in Fig. 7 a and discharge;
Fig. 8 is the plasma display dirving method waveform synoptic diagram in the embodiment of the invention;
Fig. 9 is the plasma display dirving method waveform synoptic diagram in the routine techniques;
Figure 10 is the drive unit module map of the plasma display in the embodiment of the invention;
Figure 11 is the drive signal of utilizing among Fig. 8, when monox is covered on the partition wall with film morphology, and the driving condition test result waveform synoptic diagram of 3 electrode surface discharge type plasma displays;
Figure 12 is the conventional formula drive signal of utilizing among Fig. 9, and partition wall is during capping oxidation silicon, the driving condition test result waveform synoptic diagram of 3 electrode surface discharge type plasma displays.
[embodiment]
Other purpose and the characteristics of present invention will be described in detail with reference to the accompanying embodiment will have further clear and definite understanding to the present invention.
With reference to Fig. 8～Figure 12, correct embodiment of the present invention is elaborated below.
As shown in Figure 8, the PDP in the embodiment of the invention can be divided into, whole image is tentatively changed the required address of reseting period, the selected cell of processing during, selected unit is kept during the keeping of discharge.
At the reseting period initial stage, will while ramp waveform (Ramp-up) in all scan electrode Y supplies.Meanwhile, also to keeping electrode Z and address electrode X supply 0[V].By last ramp waveform (Ramp-up), in the unit of whole image, between scan electrode Y and the address electrode X and scan electrode Y and keeping between the electrode Z, will write these just like electric discharge phenomena of discharge.By writing electric discharge phenomena, at address electrode X with keep on the electrode Z, will put aside the wall electric charge of positive polarity (+), and on scan electrode Y, will put aside the wall electric charge of negative polarity (-).
In supply, after the ramp waveform (Ramp-up), be lower than the crest voltage that goes up ramp waveform (Ramp-up), reduce to the scanning bias voltage voltage of negative polarity (following ramp waveform (Ramp-dn) Vy) will be fed among the scan electrode Y simultaneously from keeping voltage (Vs) approximately.Meanwhile, keep the bias voltage (Vz-bias) of voltage (Vs) to keeping electrode Z supply, and to address electrode X supply 0[V].Under supply during ramp waveform (Ramp-dn), scan electrode Y and keep between the electrode Z and scan electrode Y and address electrode Z between, these just like electric discharge phenomena of erasure discharge will take place.By erasure discharge, the adjustment period between in (SU) wall electric charge of generating, unwanted excessive wall electric charge will be wiped free of in the discharge process of address.The adjustment period between during (SU) and descend (set down) in the wall charge variation of (SD), the wall electric charge on the address electrode X changes hardly, and negative polarity (-) the wall electric charge of scan electrode Y will reduce gradually.The wall electric charge of keeping electrode Z the adjustment period between the polarity of (SU) be positive polarity, but savings is equivalent to the negative polarity wall electric charge of negative polarity (-) the wall electric charge reduction of scan electrode Y, and between decrement phase (SD), this polarity will gradually become negative polarity.
During the address, negative polarity scanning impulse (scan) will be fed among the scan electrode Y successively, and will be synchronous with scanning impulse (scan) simultaneously, to the data pulse (data) of address electrode X supply positive polarity.Strengthen along with the voltage difference of scanning impulse (scan) and data pulse (data) and in the wall voltage that reseting period generates, in the unit of supply data pulse (data) the address electric discharge phenomena will take place.When voltage (Vs) is kept in supply in the unit of selecting by the address discharge, the wall electric charge that can cause electric discharge phenomena will be formed.During above-mentioned address, keep the DC voltage (Zdc) that to supply positive polarity among the electrode Z.
During keeping, will and keep electrode Z alternate supplies to scan electrode Y and keep pulse (sus), and (sus1～sus6) before, the satellite pulse (stp) that can guarantee to cut off the wall charge stable will be supplied among the address electrode X to keep pulse in each supply.Satellite pulse (stp) can be brought up to positive polarity voltage with the voltage of address electrode X, and will put aside negative polarity wall electric charge on the partition wall 24, the direction of guiding discharge space or address electrode X, keep pulse (sus1～sus6) before, guarantee that the wall CHARGE DISTRIBUTION on the partition wall 24 is even in supply then.The voltage of satellite pulse (stp) approximately is set at data voltage (Vd), and its pulse height is set under data pulse or the data pulse.After the wall CHARGE DISTRIBUTION of partition wall 24 keeps stablizing, keep pulse (sus1～sus6) will alternately be fed to scan electrode Y and keep among the electrode Z to property, and by the selected unit of discharge, address, along with the wall voltage in the unit with keep pulse (sus) and strengthen gradually, when pulse (sus) is kept in supply, all can at scan electrode Y and keep to cause between the electrode Z and keep electric discharge phenomena, promptly cause the demonstration electric discharge phenomena.
After keeping electric discharge phenomena and finishing, the not shown oblique wave (ramp-ers) of wiping will be supplied to scan electrode Y or keep on the electrode Z, to wipe the wall electric charge that remains in the whole image unit.
As shown in Figure 9, during the keeping in routine techniques in, the voltage on the address electrode X will be kept base voltage (GND) or 0V, and not supply the wall CHARGE DISTRIBUTION that can guarantee partition wall 24 stable any signal.
Figure 10 is the drive unit synoptic diagram of the PDP in the embodiment of the invention.
As shown in figure 10, the PDP drive unit in the embodiment of the invention is made up of following structure: promptly, and to the address electrode of PDP (the required data driver 102 of supply data of X1～Xm); Driven sweep electrode (the scanner driver 103 that Y1～Yn) is required; Driving keep electrode Z this unify electrode required keep driver 104; Control the required time schedule controller 101 of each driver 102,103,104; Driving voltage generator 105 to the required driving voltage of each driver 102,103,104 supply.
In data driver 102, by the effect of reverse compensating circuit, error diffusion circuit, carry out reverse compensation and error diffusion after, by the subdomain mapping circuit, supply is mapped to data on each subdomain.102 pairs of timing control signals that send from time schedule controller 101 of data driver (Cx) give a response, and choose with latch data after, give address electrode X1～Xm with this data supply.In addition, data driver 102 during keeping in, every supply is kept pulse (sus) before, all the satellite pulse (stp) with data voltage (Vd) is supplied to address electrode X1～Xm.
Scanner driver 103 under the control of time schedule controller 101, in reseting period, will be in scan electrode Y1～Ym supply ramp waveform (Ramp-up) and following ramp waveform (Ramp-dn), and in during the address, will supply scanning impulse (scp) successively.In addition, scanner driver 103 under the control of time schedule controller 101, during keeping in, will keep pulse (sus1, sus3, sus5) to scan electrode Y1～Ym supply.
Keep driver 104 under the control of time schedule controller 101, during the address in, will supply dc offset voltage (Vz-bias), then during keeping in, with scanner driver 103 alternately running mutually, keep pulse (sus2, sus4, sus6) with supply.
Time schedule controller 101 will receive vertical/horizontal synchronizing signal and timing signal, generate the required timing control signal of each driver (Cx, Cy, Cz), and above-mentioned timing control signal (Cx, Cy, Cz) is supplied to corresponding driving device 102,103,104 separately, with this Control Driver 102,103,104.In data controlling signal (Cx), will comprise required switch controlling signal switching time of choosing required sampling time of data, latch control signal, energy recovering circuit and controlling and driving on-off element.In scan control signal (Cy), will comprise the energy recovering circuit in the gated sweep driver 103 and required switch controlling signal switching time of driving switch element.In addition, in keeping control signal (Cz), comprise that also control keeps the energy recovering circuit in the driver 104 and required switch controlling signal switching time of driving switch element.
Driving voltage generator 105 will generate ramp waveform (Ruy, Ruz) adjustment voltage (Vsetup), be set at scanning voltage negative polarity scanning bias voltage voltage (Vy), dc offset voltage voltage (Vy-bias, Vz-bias), keep voltage (Vs), data voltage (Vd).Above-mentioned driving voltage can become according to the composition or the discharge cell structure of discharge gas.
In addition, the inventor is by applying for a patent (2003.7.16) 2003-48732 number, guarantee that the wall CHARGE DISTRIBUTION on the partition wall keeps stable, had once developed structure of low heritability thin layer such as capping oxidation silicon or magnesium oxide on partition wall 24 and preparation method thereof.
Figure 11 is the drive signal of utilizing among Fig. 8, when monox is covered on the partition wall with film morphology, and the driving condition test result waveform synoptic diagram of 3 electrode surface discharge type plasma displays.In this test process, (sus1～sus6) is with frequency and 24 umber of pulses of 167kHz, and to scan electrode with keep in the electrode, the voltage of stabilization pulse (stp) is set to 80V by alternate supplies to keep pulse.Show according to this test result, PDP driving method and device thereof among the present invention, the degree of rocking of wall electric charge is Δ 4.81E-09C/cm2 in the wall electric charge of positive polarity, then is Δ 4.42E-09C/cm2 in the wall electric charge of negative polarity.
Figure 12 is the conventional formula drive signal of utilizing among Fig. 9, and partition wall is during capping oxidation silicon, the driving condition test result waveform synoptic diagram of 3 electrode surface discharge type plasma displays.In this test process, (sus1～sus6) is with frequency and 24 umber of pulses of 167kHz, and to scan electrode with keep in the electrode, the voltage of the address electrode in during keeping is set to 0V by alternate supplies to keep pulse.Show that according to this test result it is Δ 6.61E-09C/cm2 that the driving method of conventional formula PDP and device thereof, wall electric charge rock degree, and in the wall electric charge of negative polarity, then is Δ 7.31E-09C/cm2 in the wall electric charge of positive polarity.
By accompanying drawing 11 and accompanying drawing 12 as can be known, keeping pulse (sus1～sus6) before, supply stabilization pulse (stp) earlier, and after covering the silicon oxide film of low heritability on the partition wall to the address electrode supply, compare with routine techniques, can reduce the degree of rocking of wall electric charge significantly.
By above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.
Therefore, the technical scope of this invention is not limited to the content on the instructions, must determine its technical scope according to interest field.
Claims (7)
1. plasma display dirving method, described method comprises during three: be provided with the drive electrode that can distinguish the 1st electrode, the 2nd electrode, the 3rd electrode and the partition wall in cell discharge space, and said units tentatively changed the reseting period of processing; Select during the required address of said units; Keep cell discharge required keep during; Described method is made up of following two steps:
During keeping, supply a plurality of satellite pulses, the step of rocking with the wall CHARGE DISTRIBUTION that prevents on the partition wall to the 1st electrode;
After generating satellite pulse, keep the step of pulse to the 2nd electrode and the 3rd electrode supply.
2. plasma display dirving method as claimed in claim 1 is characterized in that, described method also should comprise following two steps:
At reseting period, tentatively change the step of waveform to the 2nd electrode supply;
During the address, to the 2nd electrode supply scanning impulse, and to the 1st electrode supply data pulse, with the step of selected cell.
3. plasma display dirving method as claimed in claim 2 is characterized in that,
Described satellite pulse should be set to the voltage of data pulse.
4. the drive unit of plasma display, described device is divided into the drive electrode that can distinguish the 1st electrode, the 2nd electrode, the 3rd electrode and the partition wall in cell discharge space, and to said units tentatively change processing reseting period, select the required address of said units during, keep that cell discharge is required and keep during, comprising:
During keeping, supply a plurality of satellite pulses to the 1st electrode, the data driver of the wall CHARGE DISTRIBUTION stabilization of rocking with the wall CHARGE DISTRIBUTION that prevents on the partition wall;
After generating satellite pulse, keep the scanner driver of pulse to the 2nd electrode supply, keep the driver of keeping of pulse to the 3rd electrode supply.
5. the drive unit of plasma display as claimed in claim 4 is characterized in that:
At described reseting period, described scanner driver is tentatively changed waveform to the 2nd electrode supply;
During described address, at described scanner driver to the 2nd electrode supply scanning impulse simultaneously, described data driver is to the 1st pulse of electrode supply data, the address of said units for you to choose.
6. the drive unit of plasma display as claimed in claim 5 is characterized in that,
In above-mentioned wall CHARGE DISTRIBUTION stabilization driver, satellite pulse should be set at the voltage of data pulse.
7. the drive unit of plasma display as claimed in claim 4 is characterized in that,
The oxide film of film forming also should be set on above-mentioned partition wall.
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|---|---|---|---|
| CNB2004100843564A CN100383846C (en) | 2004-11-19 | 2004-11-19 | Driving method and device for plasma displaying device |
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| CNB2004100843564A CN100383846C (en) | 2004-11-19 | 2004-11-19 | Driving method and device for plasma displaying device |
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| CN100383846C true CN100383846C (en) | 2008-04-23 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003140598A (en) * | 2001-11-01 | 2003-05-16 | Sony Corp | Plasma display device, its drive circuit and drive method |
| CN1459772A (en) * | 2002-05-24 | 2003-12-03 | 富士通日立等离子显示器股份有限公司 | Method for driving plasma display panel |
| JP2004085755A (en) * | 2002-08-26 | 2004-03-18 | Matsushita Electric Ind Co Ltd | Driving method of plasma display device |
| CN1539131A (en) * | 2001-06-12 | 2004-10-20 | ���µ�����ҵ��ʽ���� | Plasma display |
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- 2004-11-19 CN CNB2004100843564A patent/CN100383846C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1539131A (en) * | 2001-06-12 | 2004-10-20 | ���µ�����ҵ��ʽ���� | Plasma display |
| JP2003140598A (en) * | 2001-11-01 | 2003-05-16 | Sony Corp | Plasma display device, its drive circuit and drive method |
| CN1459772A (en) * | 2002-05-24 | 2003-12-03 | 富士通日立等离子显示器股份有限公司 | Method for driving plasma display panel |
| JP2004085755A (en) * | 2002-08-26 | 2004-03-18 | Matsushita Electric Ind Co Ltd | Driving method of plasma display device |
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