CN100463025C - Plasma display device driver - Google Patents
Plasma display device driver Download PDFInfo
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- CN100463025C CN100463025C CNB2005100947888A CN200510094788A CN100463025C CN 100463025 C CN100463025 C CN 100463025C CN B2005100947888 A CNB2005100947888 A CN B2005100947888A CN 200510094788 A CN200510094788 A CN 200510094788A CN 100463025 C CN100463025 C CN 100463025C
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Abstract
A driving device for plasma display includes a plasma display with an upper base board of several couples of scanning and maintaining electrodes and a bottom base board of data electrodes crossing with the scanning and maintaining electrodes and an insulation wall coated by fluorophor; a electrode driving unit to drive the scanning, maintaining and data electrodes; a control unit to control timing signal to keep either the scanning or the maintaining electrode in floating according to Xenon amount injected in the plasma display during the sleeping time of maintaining pulse alternately induced into the scanning or the maintaining electrodes. This invention effectively deletes sticking image by increasing Xenon amount injected into PDP.
Description
Technical field
The present invention relates to a kind of plasma display device driver, be particularly related to the increase that a kind of basis is injected into the inner xenon content of plasma display and eliminate the afterimage of generation, and can prevent a kind of plasma display device driver of harmful effect such as high temperature and erroneous discharge.
Background technology
Plasma display generally speaking (to call PDP in the following text) is to make light-emitting phosphor by the ultraviolet ray that He+Xe (helium+xenon), Ne+Xe inert mixed gas such as (neon+xenons) produce 147nm when the discharge, to reach the purpose of image informations such as display text or chart.
Fig. 1 is the structural map of present three-electrode surface discharge type AC-PDP.With reference to Fig. 1, the scan electrode 11a that is positioned on the upper substrate 10 is arranged on the three-electrode surface discharge type AC-PDP and keep electrode 12a, and be positioned at the addressing electrode 22 on the lower basal plate 20.Scan electrode 11a is a transparency electrode with keeping electrode 12a, and they are to be made by indium oxide.At scan electrode 11a and the metal bus electrode 11b, the 12b that keep the promising reduction resistance of difference on the electrode 12a; scan electrode 11a is being arranged and keeping on the upper substrate 10 of electrode 12a; upper dielectric layer 13a and diaphragm 14 are arranged; on upper dielectric layer 13a, can assemble the wall electric charge that ionic discharge produces; sharp the penetrating in the upper dielectric layer 13a damage that diaphragm 14 produces when preventing ionic discharge can also effectively be improved the efficient of secondary electron discharge.Diaphragm 14 utilizes magnesium oxide to make MgO usually.
In addition, on the lower basal plate 20 that addressing electrode 22 is arranged, lower dielectric layer 13b and dividing wall 21 are arranged, scribble luminescent coating 23 on the surface of lower dielectric layer 13b and dividing wall 21.Addressing electrode 22 is positioned at scan electrode 11a and keeps on the direction of electrode 12a intersection.Dividing wall 21 is arranged side by side with addressing electrode 22, and can prevent because the ultraviolet ray and the visible light that produce during discharge leak in the discharge cell that closes on.The ultraviolet ray that luminescent coating 23 produces during according to plasma discharge can produce the visible light of a kind of color in the red, green, blue look.In the discharge space of the discharge cell between upper and lower base plate 10,20 and dividing wall 21, necessary He+Xe (helium+xenon), Ne+Xe inert mixed gas such as (neon+xenons) when being injected into discharge below describe the technique of expression of the PDP gradation of image coefficient of the prior art of this kind structure.
Fig. 2 is the synoptic diagram of the method for present PDP gradation of image demonstration.As shown in the figure, the gradation of image coefficient of PDP is divided into the different son field of several number of light emission times in a frame, drive to realize PDP.For reaching the effect of balanced discharge, each son field is divided into reset period again, selects the address period of discharge cell and realizes keeping the phase of gray scale demonstration according to discharge time.For example, come under the situation of display image by 256 grades of gray scales, a frame time (16.67ms) of 1/60 second is divided into 8 son fields again, and while 8 son fields are divided into address period again respectively and keep the phase.Therefore, each reset period of sub is different with the phase of keeping of each son field with address period, and the phase of keeping of each son field ratio according to 2n (n=0,1,2,3,4,5,6,7) in above-mentioned each height field increases.
Fig. 3 is a chart of showing present PDP driving method.As shown in Figure 3, PDP distinguishes address period that makes the initialized initialization of full frame phase, selection discharge cell and the phase of keeping of keeping the discharge cell discharge, and it is driven.
Based on the initialization phase, in the rising stage, on all scan electrode Y, introduce the upstroke slope waveform pulse simultaneously, according to the upstroke slope waveform pulse, in the discharge cell of full frame, produce discharge, discharge accumulates anodal electric charge at addressing electrode X with keeping on the electrode Z according to rising, on scan electrode Y, accumulate cathode charge, in decrement phase SD, after supplying with the upstroke slope waveform pulse, beginning is discharged but produce faint elimination in the descending grade waveform pulse guiding discharge unit of basic voltage or the reduction of negative pole specific voltage standard to the cathode voltage conversion of forcing down than the peak electricity of upstroke slope waveform pulse.Therefore it can partly eliminate the unnecessary wall electric charge of generation.According to the discharge that descends, cause the wall electric charge of addressing balanced discharge in discharge cell, to be evenly distributed.
In address period, when in order the negative pole scanning impulse being introduced scan electrode Y, scanning impulse also begins operation, to introduce anodal data pulse to addressing electrode X.The wall voltage addition that produces in the voltage difference of scanning impulse and data pulse and initialization phase, and address discharge takes place in the discharge cell of introducing data pulse.In the selected discharge cell of foundation address discharge, but when keeping voltage, introducing just produced the wall electric charge of guiding discharge.Keep electrode Z in decrement phase and address period, can reduce with scan electrode Y between voltage difference, and provide the anodal DC voltage Zdc that can prevent simultaneously with scan electrode Y generation erroneous discharge.
In the phase of keeping, alternately to scan electrode Y with keep electrode Z and introduce and keep pulse, according to address discharge, the wall voltage in the discharge cell with keep impulse summation, and when introducing each and keep pulse, at each scan electrode Y with keep to produce between electrode Z and keep discharge, promptly produce and show discharge.
After keeping the discharge end, supply with pulse pulsewidth and all little sloping type waveform pulse of voltage standard to keeping electrode Z, and eliminate the interior residual wall electric charge of discharge cell of full frame.
If the PDP that this kind method drives produces shelf depreciation on display screen, the problem of afterimage will appear so.
Fig. 4 is the key diagram that local afterimage takes place in existing P DP.As shown in the figure, under the situation that the central authorities of display show, pattern of windows will produce the phenomenon of concentrating discharge on a part of 200a of display surface 200 in pattern of windows.Therefore, if produce discharge on all pattern 200b, afterimage 200c will appear in the pattern of windows that showed on a part of 200a of pattern displaying face 200.Though this afterimage 200c is caused by multiple reason, its basic reason is that the illumination effect instability of fluorophor causes during by the cell discharge of display surface.Particularly aforesaid local afterimage phenomenon is more obvious according to the increase of the amount of injecting xenon for the raising luminescent properties and fluorophor distribution area.To this, describe with reference to Fig. 5.
Fig. 5 is in existing P DP inside, the synoptic diagram of the electric discharge phenomena that show along with the increase of injecting xenon.Shown in (a) among Fig. 5, if increase the xenon amount in the PDP, at scan electrode 11a with keep between electrode 12a when discharge takes place, owing to and produce strong effect between addressing electrode, disperseing appears in the electric field that can cause scan electrode 11a and keep between electrode 12a, and the dispersion of this electric field is shown in (b) among Fig. 5, when surface-discharge, relative discharge effect between addressing electrode will be weakened, the problem of voltage also will occur improving when face discharges simultaneously.
In addition, the relative discharge effect that weakens between addressing electrode when surface-discharge also just means R, G, and the luminescence efficiency of B fluorophor and stability reduce.Promptly in surface-discharge, make the heating of fluorophor bottom surface in the phosphor area that relative discharge between addressing electrode can cause smearing on the dividing wall surface, also just changed R separately, G, the luminescent condition of B fluorophor, therefore, when picture presents whole white in the sparking voltage of regulation each fluorophor be not 100% luminous, but luminous ratio is R:G:B=90%:80%:70% or R:G:B=92%:79%:78%.Therefore, in fact just can't realize complete white screen picture.Just because of this, in the PDP of reality display frame, be not the true qualities of original image, but performance is afterimage.
These problems have only when surface-discharge by prolong introducing scanner uni and keep the ER-up time of keeping pulse of electrode and could solve.Above ER-up as shown in Figure 6, just keep pulse from 0v to keeping the required time of voltage Vs.
But, if prolong the aforesaid ER-up time of keeping pulse, so not only can not alleviate the phenomenon of the afterimage of picture, but also cause harmful effect and increase the probability that erroneous discharge phenomenon at high temperature takes place greatly.
Summary of the invention
The invention provides this stability of keeping the luminescence efficiency of fluorophor, when shelf depreciation, improve afterimage, reduce the drive unit of the harmful effect and the plasma display of the probability of happening that improves the discharge that in hot environment, makes a mistake.
For solving above technical matters, the present invention is made up of following components: keep electrode by a plurality of scanner unis and be formed at upper substrate in pairs, simultaneously be formed at lower basal plate with scanning and the dividing wall keeping the data electrode of electrode crossing setting and be coated with full fluorophor and the plasma display that constitutes; Driven sweep, keep and each electrode drive portion of data electrode; Be controlled at and keep electrode to scanner uni and alternately introduce and keep in the rest time of pulse, according to the amount of the xenon of injecting in plasma display, control makes scanning and keeps the timing control part that a electrode in the electrode is in the timing signal of quick condition.
When the xenon injection rate IR accounted for the 7%-14% of the inner injection of plasma display all gas total amount, the ER-up time of keeping pulse was just below the above 500ns of 400ns.
At timing control part to scanning with keep electrode and alternately introduce and keep in the repose period of pulse, scan electrode and keep electrode and all be in quick condition.
Scan electrode and when keeping electrode and being in quick condition, the pulsewidth of the pulse of floating is less than 1 μ s.
The pulse of keeping of introducing scan electrode is to finish overlapping (over lap) state with introducing the pulse of keeping of keeping electrode.
Keep the end overlap condition of pulse and keep the recurrence interval generation once at per two.
The end overlap condition of keeping pulse begins to carry out keeping on 1/2 position of voltage.
The dividing wall that is positioned on the plasma display lower basal plate exists with intersecting parallels.
The present invention is the phenomenon according to the afterimage that produces when the increase of the inner xenon amount of injecting of PDP is removed in shelf depreciation effectively, and effect is fine.
In addition, produce in the process of afterimage preventing, and need not improve sparking voltage, but just can remove the phenomenon of afterimage, to guarantee normal voltage difference with lower voltage.
Description of drawings
Fig. 1 is the structural map of present three-electrode surface discharge type AC-PDP;
Fig. 2 is the synoptic diagram of the method for present PDP gradation of image demonstration;
Fig. 3 is a chart of showing present PDP driving method;
Fig. 4 is the synoptic diagram that local afterimage takes place in existing P DP;
Fig. 5 is in existing P DP inside, the synoptic diagram of the electric discharge phenomena that show along with the increase of injecting xenon;
Fig. 6 keeps the synoptic diagram that electrode is introduced the ER-up time of keeping pulse to scanner uni;
Fig. 7 is the summary exploded view of plasma display device driver of the present invention;
Fig. 8 is to the foundation synoptic diagram of keeping the rest time of pulse of the present invention;
Fig. 9 is the performance figure that keeps drive waveforms of PDP of the present invention;
Figure 10 is that another of PDP of the present invention kept the performance figure of drive waveforms.
Accompanying drawing major part symbol description
50: plasma display 51a: scanning driving part
51b: keep drive division 51c: data-driven portion
60: timing control part
Embodiment
Below with reference to accompanying drawings embodiments of the invention are elaborated.
Fig. 7 is the summary exploded view of plasma display device driver of the present invention, and Fig. 8 is a key diagram of keeping the rest time of pulse of the present invention.With reference to Fig. 7 and Fig. 8, plasma display device driver of the present invention comprises: by a plurality of a pair of scan electrodes (Y1 is to Ym) are arranged and keep upper substrate (not having diagram) that electrode (Z1 is to Zm) forms, at scan electrode with keep the lower basal plate (not having diagram) that there is the dividing wall (not having diagram) that is covered with data electrode (X1 is to Xm) and fluorophor (not having diagram) in electrode crossing portion and the plasma display plate 50 of formation jointly; Driven sweep, keep the scanning driving part 51a with data electrode, keep drive division 51b, the 51c of data-driven portion; In scanning with timing control part 60 compositions that the xenon amount of injecting in keeping on the electrode in the quiescent period of keeping pulse of alternately introducing according to plasma display 50 is come gated sweep, an electrode keeping electrode is in the timing signal of quick condition.
The rest time of keeping pulse here is scan electrode and keeping the time that electrode is kept zero volt voltage at that time just.
Scanning driving part 51a after scan electrode is supplied with upstroke slope waveform pulse and descending grade waveform pulse, supplies with the scanning impulse of selecting sweep trace in address period in order to scan electrode in the initialization phase.In addition, the discharge cell of selecting in address period is provided as generation to scan electrode and keeps the required pulse of keeping of discharging simultaneously.
After the territory gamma revision and error diffusion that the 51c of data-driven portion basis (not having diagram) territory gamma revision portion and error diffusion portion provide, a foundation mapping portion is under the control of timing control part, with 1 line is that unit latchs being mapped to a son interior data, afterwards these latched data is offered data electrode simultaneously.
Keep drive division 51b in decrement phase and address period when supplying with DC voltage, in the phase of keeping, supply with and keep pulse to keeping electrode.Keeping pulse adjusts according to the prior timing controling signal of setting of timing control part.
Therefore, can stably keep the discharging efficiency of each fluorophor when keeping discharge, to prevent on image, occurring residual phenomena.
, will make and keep the quick condition that pulse is in standard for injecting 10% when above of the inner all gas total amount of PDP in the amount of xenon.This moment, timing control part 60 will be adjusted to the ER-up time of keeping pulse below the 500ns.If the ER-up overlong time promptly when 500ns is above, will increase the probability of happening of the erroneous discharge in the hot environment here.
The erroneous discharge of considering xenon amount and the afterimage phenomenon of injecting, the ER-up time of keeping pulse and hot environment in PDP is all relevant.Therefore, when the amount of the inner xenon of injecting of plasma display of the present invention accounts for the 7%-14% of gas gross, will be in quick condition introducing scanning and keep in rest time of keeping pulse of electrode.The ER-up time that keep pulse this moment just is adjusted to below the above 500ns of 400ns.
Therefore, among the present invention as shown in Figure 9, in scanning with when keeping electrode and being in quick condition, just should be in 1 μ s the pulse-width controlled of the unsteady pulse that shows.The quick condition is here kept the scan electrode of pulse and is kept in the electrode in introducing shown in (a), though can be an electrode regulating to quick condition, shown in (b), also can scan electrode with keep electrode regulating for all being in quick condition.
Keeping in the repose period of pulse,, will improve sparking voltage, Just because of this, rising, as shown in figure 10, just the timing signal of keeping pulse is being adjusted in order to prevent sparking voltage if be in quick condition.
Figure 10 is the performance figure that keeps drive waveforms according to the another one of PDP of the present invention.As shown in the figure, keeping pulse and introducing the timing signal of keeping pulse of keeping electrode of introducing scan electrode is adjusted into the end overlap condition, in time, the startup particle of the self-discharge that utilization produces is made low-voltage and is kept pulse to keeping the electrode introducing at the ER-up that keeps pulse that introduces scan electrode.Introducing the lap of keeping pulse that scans and keep electrode this moment took place once in per two cycles of keeping pulse.Keeping on 1/2 the position of voltage, regulating the timing signal that produces and just can produce the stable discharge of keeping.
Therefore, in scan electrode, after the sparking voltage that produces with the quick condition of keeping pulse rises, owing to keep discharge, the phenomenon of sparking voltage rising in the time of therefore just can not causing all discharging keeping on the electrode just can to produce with low voltage.
Even change or keep the overlapped sparking voltage that also can not cause of pulse and rise in scan electrode and the quick condition of keeping electrode.
Therefore, PDP drive unit of the present invention is: along with the increase in the amount of the inner xenon of injecting of PDP, can prevent residual picture phenomenon, but the situation of considering the big more afterimage of fluorophor distribution area in present technology is just serious more, therefore, PDP of the present invention reduces the distribution area of fluorophor in the structure of the dividing wall that spreads all over fluorophor, replace the overall isolation wall construction with little dividing wall form, to prevent the generation of afterimage.Therefore, the dividing wall that is positioned among the present invention on the PDP lower basal plate is an intersecting parallels.
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 (8)
1, a kind of plasma display device driver is characterized in that, it is made of following several parts:
Keep electrode by a plurality of scanner unis and be formed at upper substrate in pairs, simultaneously be formed at lower basal plate and the plasma display that constitutes with scanning and the dividing wall keeping the data electrode of electrode crossing setting and be coated with full fluorophor;
Driven sweep, keep and each electrode drive portion of data electrode;
Be controlled at and keep electrode to scanner uni and alternately introduce and keep in the rest time of pulse, according to the amount of the xenon of injecting in plasma display, control makes scanning and keeps the timing control part that a electrode in the electrode is in the timing signal of quick condition.
2, plasma display device driver as claimed in claim 1 is characterized in that, when the xenon injection rate IR accounted for the 7%-14% of the inner injection of plasma display all gas total amount, the ER-up time of keeping pulse was just below the above 500ns of 400ns.
3, plasma display device driver as claimed in claim 1 is characterized in that, at timing control part to scanning with keep electrode and alternately introduce and keep in the repose period of pulse, scan electrode and keep electrode and all be in quick condition.
4, as any described plasma display device driver in the claim 1 to 3, it is characterized in that, scan electrode and when keeping electrode and being in quick condition, the pulsewidth of the pulse of floating is less than 1 μ s.
5, plasma display device driver as claimed in claim 1 is characterized in that, the pulse of keeping of introducing scan electrode is to finish overlap condition with introducing the pulse of keeping of keeping electrode.
6, plasma display device driver as claimed in claim 5 is characterized in that, keeps the end overlap condition of pulse and keeps the recurrence interval generation once at per two.
As claim 5 or 6 described plasma display device drivers, it is characterized in that 7, the end overlap condition of keeping pulse begins to carry out keeping on 1/2 position of voltage.
8, plasma display device driver as claimed in claim 1 is characterized in that, the dividing wall that is positioned on the plasma display lower basal plate exists with intersecting parallels.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100947888A CN100463025C (en) | 2005-09-30 | 2005-09-30 | Plasma display device driver |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100947888A CN100463025C (en) | 2005-09-30 | 2005-09-30 | Plasma display device driver |
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| CN1941035A CN1941035A (en) | 2007-04-04 |
| CN100463025C true CN100463025C (en) | 2009-02-18 |
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| CNB2005100947888A Expired - Fee Related CN100463025C (en) | 2005-09-30 | 2005-09-30 | Plasma display device driver |
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| CN103258497A (en) * | 2012-12-28 | 2013-08-21 | 四川虹欧显示器件有限公司 | Method for reducing energy consumption of plasma display and improving brightness of plasma display |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797586A (en) * | 1980-11-20 | 1982-06-17 | Control Data Corp | Pilot cell driving circuit for plasma display |
| CN1410960A (en) * | 2001-10-10 | 2003-04-16 | Lg电子株式会社 | Plasma display plate and its driving method |
| EP1376524A2 (en) * | 2002-06-28 | 2004-01-02 | Fujitsu Limited | Method and device for driving plasma display panel |
| CN1573864A (en) * | 2003-06-10 | 2005-02-02 | Lg电子有限公司 | Method and apparatus for resetting a plasma display panel |
| US20050093779A1 (en) * | 2003-10-29 | 2005-05-05 | Jin-Sung Kim | Plasma display panel driving method |
-
2005
- 2005-09-30 CN CNB2005100947888A patent/CN100463025C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5797586A (en) * | 1980-11-20 | 1982-06-17 | Control Data Corp | Pilot cell driving circuit for plasma display |
| CN1410960A (en) * | 2001-10-10 | 2003-04-16 | Lg电子株式会社 | Plasma display plate and its driving method |
| EP1376524A2 (en) * | 2002-06-28 | 2004-01-02 | Fujitsu Limited | Method and device for driving plasma display panel |
| CN1573864A (en) * | 2003-06-10 | 2005-02-02 | Lg电子有限公司 | Method and apparatus for resetting a plasma display panel |
| US20050093779A1 (en) * | 2003-10-29 | 2005-05-05 | Jin-Sung Kim | Plasma display panel driving method |
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Granted publication date: 20090218 Termination date: 20091030 |