CN103903551A - Plasma displayer driving method - Google Patents
Plasma displayer driving method Download PDFInfo
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- CN103903551A CN103903551A CN201410093984.2A CN201410093984A CN103903551A CN 103903551 A CN103903551 A CN 103903551A CN 201410093984 A CN201410093984 A CN 201410093984A CN 103903551 A CN103903551 A CN 103903551A
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- interval
- crosstalking
- low discharge
- reset period
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Abstract
The invention provides a plasma displayer driving method. In detail, the method includes the steps that an input LVDS signal is processed, calculation of the number of addressing on-off times is increased, sections of the number of on-off times are divided according to the number of addressing on-off times of a current sub-field and a picture discharging phenomenon, and the length of the horizontal section of a descent slope of the corresponding section at the reset period is set. According to the scheme, the method is simple and easy to implement, and crosstalk and low discharging unhealthy phenomena are effectively avoided.
Description
Technical field
The present invention relates to a kind of method for driving plasma display device, particularly relate to one and be applicable to.
Background technology
Liquid crystal display (LCD), electroluminescent display (LED) and plasma display (PDP) etc. have obtained effective exploitation in recent years.PDP in flat-panel monitor has good brightness and luminescence efficiency compared with the flat-panel monitor of other type, and also has wider visual angle.Therefore, PDP becomes the perpetual object that substitutes conventional cathode-ray tube (CRT) (CRT) in the large area display that is greater than 40 inches.
Fig. 1 is conventional PDP drive waveforms figure, and Fig. 2 is PDP distribution of electrodes figure.Conventionally in PDP, single frame is divided into multiple subframes, and gray scale is represented by the combination of subframe.Each subframe is made up of reset period, address period and maintenance phase three parts.
Reset period: by ramp waveform, screen is applied to higher voltage, make all discharge cells produce electric discharge, and make each unit before address period starts, discharge condition reaches unanimity as far as possible.
Address period: apply scanning impulse on scan electrode, and the unit that needs are lighted applies addressing pulse signal at addressing electrode, make the unit that need to light produce electric discharge, and again accumulate wall electric charge, so that maintenance phase regular picture.
Maintenance phase: show electrode is to alternately applying and maintain pulse signal on X, Y electrode, and the unit continuous discharge that need light is luminous.
Reset period decline slope horizontal section length has considerable influence to current subfield address period and maintenance phase:
1, as shown in Figure 3, reset period decline slope horizontal segment is partially short, the wall electric charge of unit accumulation is more, address discharge is strengthened, there is a large amount of Priming particles in discharge cell space, this part ion is easily diffused into adjacent cells, causes adjacent cells easily by mistake addressing, cause maintenance phase to light, produce and crosstalk.
2, reset period decline slope horizontal segment is partially long, and the wall electric charge of unit accumulation is less, makes address discharge deficiency, causes this unit not addressed, can not light in maintenance phase, produces low discharge.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of avoid producing crosstalk or the method for driving plasma display device of low discharge.
The technical solution used in the present invention is as follows: a kind of method for driving plasma display device, it is characterized in that: concrete grammar is: to the processing of input LVDS signal, increase the calculating of search switch number, divide switch time intervals according to the search switch number of times of current subfield and picture electric discharge phenomena, and corresponding interval reset period decline slope horizontal section length is arranged.
As preferably, concrete grammar step is: step 1, calculate search switch number of times; Step 2, observing current picture electric discharge phenomena and whether have low discharge or crosstalk badly, is to calculate to occur low discharge or the corresponding search switch number of times of the bad picture of crosstalking; Step 3, carry out interval division according to the on-off times calculating in step 1 and step 2, on-off times according to 1179648/2 is boundary, low interval is arranged to short reset period decline slope horizontal section length, high interval is arranged to long reset period decline slope horizontal section length, between mesozone, normally arrange.
As preferably, described division low discharge or the corresponding search switch number of times of the bad picture of crosstalking are included in divided interval.
As preferably, in described step 3, the reset period decline slope horizontal section length in described low interval is set to 10 μ S-30 μ S.
As preferably, in described step 3, described high interval reset period decline slope horizontal section length is set to 50 μ S-70 μ S.
As preferably, in described step 3, the reset period decline slope horizontal section length in first described low interval is set to 20 μ S, observe current picture electric discharge phenomena, whether there is low discharge or the bad phenomenon of crosstalking, if occur, low discharge phenomenon continues to reduce described length setting, if there is the bad phenomenon of crosstalking, improves described length setting.
As preferably, in described step 3, first described high interval reset period decline slope horizontal section length is set to 60 μ S, observe current picture electric discharge phenomena, whether have low discharge or the bad phenomenon of crosstalking, if occur, low discharge phenomenon reduces described length setting, if there is the bad phenomenon of crosstalking, continue to improve described length setting, the like, until low discharge or the bad phenomenon of crosstalking disappear.
As preferably, described step also comprises, if there is low discharge and the bad picture on-off times intersection of crosstalking, arranges and comprises close low discharge and the on-off times interval of the bad picture of crosstalking, carry out suitable described length in this interval selection is set, until low discharge and the bad phenomenon of crosstalking disappear.
Compared with prior art, the invention has the beneficial effects as follows: novelty increases search switch counting module, and the different picture of search switch number is carried out to the compensation of corresponding reset period decline slope horizontal section length, method is simple, has effectively avoided crosstalking and the generation of low discharge bad phenomenon.
Accompanying drawing explanation
Fig. 1 is that conventional PDP drives schematic diagram.
Fig. 2 is PDP distribution of electrodes schematic diagram.
Fig. 3 is the generation schematic diagram of crosstalking.
Fig. 4 is PDP display control module schematic diagram.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Disclosed arbitrary feature in this instructions (comprising any accessory claim, summary and accompanying drawing), unless narration especially all can be replaced by other equivalences or the alternative features with similar object.,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
Technical characterstic of the present invention is according to the how many time spans that determine current subfield reset period decline slope horizontal segment of current subfield search switch number of times: if current subfield search switch number of times is less, current subfield reset period arranges the time span of suitably short decline slope horizontal segment, reduce wall loss of charge, avoid producing low discharge; If current subfield search switch number of times is more, the time span of the decline slope horizontal segment of suitable length is set at current subfield reset period, avoid Priming ion to be diffused into adjacent cells lattice, generation is crosstalked.
As shown in Figure 4, a kind of method for driving plasma display device, concrete grammar is: to the processing of input LVDS signal, increase the calculating of search switch number, divide switch time intervals according to the search switch number of times of current subfield and picture electric discharge phenomena, and corresponding interval reset period decline slope horizontal section length is arranged.
Concrete grammar step is: step 1, calculating search switch number of times; Step 2, observing current picture electric discharge phenomena and whether have low discharge or crosstalk badly, is to calculate to occur low discharge or the corresponding search switch number of times of the bad picture of crosstalking; Step 3, carry out interval division according to the on-off times calculating in step 1 and step 2, on-off times according to 1179648/2 is boundary, low interval is arranged to short reset period decline slope horizontal section length, high interval is arranged to long reset period decline slope horizontal section length, between mesozone, normally arrange.
This specific embodiment is take the PDP display screen of 1024*768 resolution as example, a subfield maximum address total number of switches is 1024*3*384=1179648 time, search switch number of times sum can be divided into three interval: 0-400000,400001-800000,800001-1179648.The picture that search switch number of times sum is less, an as complete white picture of lining by line scan, in a subfield, search switch is opened number of times and is add up to 1024*3*1=3072, now easily produce low discharge, therefore to shorten reset period decline slope horizontal section length, reduce wall loss of charge, avoid addressing weak discharge to cause low discharge bad; The picture that search switch number of times sum is more, white the picture of lighting as interlacing, in a subfield, search switch is opened number of times and is add up to 1024*3*384=1179648, now easily produce and crosstalk, therefore to lengthen reset period decline slope horizontal section length, avoid wall charge accumulated too much to cause causing unit mistake addressing around addressed unit in the time of addressing, cause maintenance phase to produce and misplace electricity, i.e. generation is crosstalked bad.
Described division low discharge or the corresponding search switch number of times of the bad picture of crosstalking are included in divided interval.
If only have a kind of bad low discharge or crosstalk.
Only there is low discharge picture A(on-off times 100,000), B(on-off times 200,000) and C(on-off times 300,000) time, 0-35 ten thousand between can setting area (350,000 be for guarantee on-off times the picture of 300,000 left and right comprise in), two intervals of 350,000-sum.0-35 ten thousand can arrange length correction to desired value in 10-30 μ S(test specification and guarantees to eliminate low discharge and guarantee without other discharge failure, if guarantee that without desired value picture A, B, C eliminate bad phenomenon simultaneously, need to segment three intervals such as 0-15 ten thousand, 15-35 ten thousand, 350,000-sum, or even four intervals such as 0-15 ten thousand, 15-25 ten thousand, 25-35 ten thousand, 350,000-sum, after having divided interval, test again suitable length), 350000-total number interval does not carry out length correction, keeps original length to arrange constant.
In described step 3, the reset period decline slope horizontal section length in described low interval is set to 10 μ S-30 μ S.
In described step 3, described high interval reset period decline slope horizontal section length is set to 50 μ S-70 μ S.
Picture C(on-off times 800,000 only occurs crosstalking), screen D (on-off times 900,000), 0-75 ten thousand between can setting area, 750000-sum (750,000 be for guarantee on-off times the picture of 800,000 left and right comprise in) two intervals, length correction is not carried out in 0-75 ten thousand intervals, keep original length to arrange constant, 750,000-total number interval arranges desired value assurance elimination in the μ S(test specification of length correction to 50 μ S-70 and crosstalks and guarantee without other discharge failure).
In described step 3, the reset period decline slope horizontal section length in first described low interval is set to 20 μ S, observe current picture electric discharge phenomena, whether there is low discharge or the bad phenomenon of crosstalking, if occur, low discharge phenomenon continues to reduce described length setting, if there is the bad phenomenon of crosstalking, improve described length setting.
In described step 3, first described high interval reset period decline slope horizontal section length is set to 60 μ S, observe current picture electric discharge phenomena, whether there is low discharge or the bad phenomenon of crosstalking, if occur, low discharge phenomenon reduces described length setting, if there is the bad phenomenon of crosstalking, continues to improve described length setting, the like, until low discharge or the bad phenomenon of crosstalking disappear.
When low discharge and crosstalk phenomenon occur simultaneously.
If there is low discharge picture A(on-off times 400,000), the picture of crosstalking (on-off times 800,000), can be divided into 0-45 ten thousand, 45-75 ten thousand, three intervals of 750,000-sum, 0-45 ten thousand arranges and revises 10 μ S-30 μ S(test specifications interior desired value assurance elimination low discharge and guarantee without other discharge failure), 45-75 does not revise in ten thousand intervals (in interval range, itself is without bad), and 750,000-total length correction is 50 μ S-70 μ S.
Described step also comprises, if there is low discharge and crosstalk bad picture on-off times intersection, arrange and comprise close low discharge and the on-off times interval of the bad picture of crosstalking, carry out suitable described length in this interval selection is set, until low discharge and the bad phenomenon of crosstalking disappear.
There is low discharge picture A(on-off times 200,000), low discharge picture B(on-off times 400,000), the picture C(on-off times 350,000 of crosstalking), the screen D of crosstalking (on-off times 800,000), 0-30 ten thousand, 300,000-450,000 (this interval is included picture B and C) between can setting area, four intervals of 450000-750,000,750,000-sum.0-30 ten thousand intervals arrange desired value in length 10 μ S-30 μ S(test specifications and guarantee to eliminate low discharge and guarantee without other discharge failure), 30-45 ten thousand arranges desired value in 10 μ S-50 μ S, and (this interval exists because of bad simultaneously, more complicated, therefore length of interval amplifies, in the suitable value of length of interval build-in test), 450000-750,000 do not revise (interval interior without bad), and 750,000-sum arranges desired value in 50 μ S-70 μ S.
Be that low discharge occurs that with crosstalking the switch number intersection of picture is more, need demarcation interval more.In fact the more few low discharge that more easily occurs of on-off times, more many more easily appearance of on-off times crosstalks, and therefore both opposite directions there will be above-mentioned situation hardly in reality, be divided into three intervals substantially enough.
Claims (8)
1. a method for driving plasma display device, it is characterized in that: concrete grammar is: to the processing of input LVDS signal, increase the calculating of search switch number, divide switch time intervals according to the search switch number of times of current subfield and picture electric discharge phenomena, and corresponding interval reset period decline slope horizontal section length is arranged.
2. method for driving plasma display device according to claim 1, concrete grammar step is: step 1, calculating search switch number of times; Step 2, observing current picture electric discharge phenomena and whether have low discharge or crosstalk badly, is to calculate to occur low discharge or the corresponding search switch number of times of the bad picture of crosstalking; Step 3, carry out interval division according to the on-off times calculating in step 1 and step 2, on-off times according to 1179648/2 is boundary, low interval is arranged to short reset period decline slope horizontal section length, high interval is arranged to long reset period decline slope horizontal section length, between mesozone, normally arrange.
3. method for driving plasma display device according to claim 2, described division low discharge or the corresponding search switch number of times of the bad picture of crosstalking are included in divided interval.
4. method for driving plasma display device according to claim 3, in described step 3, the reset period decline slope horizontal section length in described low interval is set to 10 μ S-30 μ S.
5. method for driving plasma display device according to claim 4, in described step 3, described high interval reset period decline slope horizontal section length is set to 50 μ S-70 μ S.
6. method for driving plasma display device according to claim 4, in described step 3, the reset period decline slope horizontal section length in first described low interval is set to 20 μ S, observe current picture electric discharge phenomena, whether there is low discharge or the bad phenomenon of crosstalking, if occur, low discharge phenomenon continues to reduce described length setting, if there is the bad phenomenon of crosstalking, improves described length setting.
7. method for driving plasma display device according to claim 5, in described step 3, first described high interval reset period decline slope horizontal section length is set to 60 μ S, observe current picture electric discharge phenomena, whether have low discharge or the bad phenomenon of crosstalking, if occur, low discharge phenomenon reduces described length setting, if there is the bad phenomenon of crosstalking, continue to improve described length setting, the like, until low discharge or the bad phenomenon of crosstalking disappear.
8. according to the method for driving plasma display device one of claim 3 to 7 Suo Shu, described step also comprises, if there is low discharge and crosstalk bad picture on-off times intersection, arrange and comprise close low discharge and the on-off times interval of the bad picture of crosstalking, carry out suitable described length in this interval selection is set, until low discharge and the bad phenomenon of crosstalking disappear.
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Citations (7)
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| KR20020090739A (en) * | 2001-05-29 | 2002-12-05 | 엘지전자 주식회사 | Reset Driving Apparatus of Plasma Display Panel |
| CN1504983A (en) * | 2002-11-28 | 2004-06-16 | ����Sdi��ʽ���� | Driving device and method for plasma display panel |
| CN1612191A (en) * | 2003-08-05 | 2005-05-04 | 三星Sdi株式会社 | Plasma display panel and driving method thereof |
| CN1779760A (en) * | 2004-11-22 | 2006-05-31 | Lg电子株式会社 | Driving device and method for plasma display panel |
| KR20070050297A (en) * | 2005-11-10 | 2007-05-15 | 엘지전자 주식회사 | Plasma display device |
| EP1939843A1 (en) * | 2006-12-27 | 2008-07-02 | LG Electronics Inc. | Plasma display apparatus and driving method thereof |
| CN101542566A (en) * | 2007-11-09 | 2009-09-23 | Lg电子株式会社 | Plasma display device |
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2014
- 2014-03-14 CN CN201410093984.2A patent/CN103903551A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020090739A (en) * | 2001-05-29 | 2002-12-05 | 엘지전자 주식회사 | Reset Driving Apparatus of Plasma Display Panel |
| CN1504983A (en) * | 2002-11-28 | 2004-06-16 | ����Sdi��ʽ���� | Driving device and method for plasma display panel |
| CN1612191A (en) * | 2003-08-05 | 2005-05-04 | 三星Sdi株式会社 | Plasma display panel and driving method thereof |
| CN1779760A (en) * | 2004-11-22 | 2006-05-31 | Lg电子株式会社 | Driving device and method for plasma display panel |
| KR20070050297A (en) * | 2005-11-10 | 2007-05-15 | 엘지전자 주식회사 | Plasma display device |
| EP1939843A1 (en) * | 2006-12-27 | 2008-07-02 | LG Electronics Inc. | Plasma display apparatus and driving method thereof |
| CN101542566A (en) * | 2007-11-09 | 2009-09-23 | Lg电子株式会社 | Plasma display device |
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Application publication date: 20140702 |