CN102760400A - Method for preventing sustaining pulse from overflowing - Google Patents
Method for preventing sustaining pulse from overflowing Download PDFInfo
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- CN102760400A CN102760400A CN2012102279439A CN201210227943A CN102760400A CN 102760400 A CN102760400 A CN 102760400A CN 2012102279439 A CN2012102279439 A CN 2012102279439A CN 201210227943 A CN201210227943 A CN 201210227943A CN 102760400 A CN102760400 A CN 102760400A
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Abstract
The invention belongs to the field of flat panel displays, and discloses a method for preventing sustaining pulse from overflowing. The method specially comprises the following steps of: dividing a frame into N sub-fields, wherein each sub-field has a resetting period for initializing a whole image, an addressing period for selecting a scanning line and selecting a discharging unit based on the selected scanning line, and a sustaining period for showing gray levels based on a discharging volume, the resetting period is equal to the addressing period, the sustaining period and the number of distributed sustaining pulses are increased according to a ratio, and the sub-field with the most sustaining pulses in the frame is placed in the end; and then carrying out the resetting period, the addressing period and the sustaining period in sequence after detecting the coming of an upper jumping edge of a field synchronization signal; and finishing the driving to the frame after detecting the coming of a lower jumping edge of the field synchronization signal, and preparing a new frame. According to the method, the sub-field (namely the maximum weight sub-field) with the most sustaining pulses in one frame is placed in the end, the driving to the frame is finished after detecting the lower jumping edge of the field synchronization signal, and then the new frame is prepared.
Description
Technical field
The invention belongs to field of flat panel displays, relate in particular to a kind of method that pulse is overflowed that prevents to keep.
Background technology
The advantage of plasma display is thin thickness and in light weight; And can be produced the product that size is big and resolution is high; Plasma display is the little low-pressure gas chamber of on display screen, arranging thousands of sealings; Excite through electric current to make it send the invisible ultraviolet light of naked eyes, ultraviolet light percussion back red, green, blue 3 look fluorophor on glass send gr visible light then, form images with this.Filling mixed gas between two thin glass plates applies voltage and makes it to produce ionized gas, makes plasma gas discharge then, reacts with fluorophor in the substrate, produces chromatic image.It with plasmatron as light-emitting component; A large amount of plasmatrons is arranged in and constitutes screen together; All be filled with the neon xenon-133 gas in each cell of each plasma correspondence; After adding high pressure between the plasmatron electrode, the gas that is enclosed in the plasmatron cell between the layer glass can produce ultraviolet light, and excites the red-green-blue fluorescent powder on the panel display screen to send visible light.Each plasmatron is as a pixel, and by the image that the light and shade and the change color combination of these pixels makes it to produce various gray scales and color, similar kinescope is luminous.
Plasma display have scan electrode (Yl, Y2 ... Yn), keep electrode (x), with scan electrode and the addressing electrode of keeping the electrode omnidirectional distribution (Al, A2 ... Am).With scan electrode, the point of crossing of keeping electrode, addressing electrode is that the center has just formed and can represent red or green or blue display unit.Scan electrode with keep electrode and be produced on the prebasal plate, and made dielectric layer and mgo protection layer again on scan electrode and the top of keeping electrode.Addressing electrode is produced on the metacoxal plate, for prevent between the horizontal adjacent display cell optics and electric on interfere with each other, between addressing electrode, also made the barrier of certain altitude.Be separated into the strip groove by barrier on the infrabasal plate, the height of barrier has also just determined the discharge space between prebasal plate and the metacoxal plate, in discharge space, charges into inert mixed gas such as He+Xe, Xe+Ne, He+Xe+Ne.On the bottom of strip groove and side, applied the fluorescent powder of different colours, arranged according to red, green, blue respectively, these fluorescent powder apply the ultraviolet back that excites that high-voltage discharge produces between electrode just can produce visible light.
Generally speaking; The son field is divided into preparatory stage, address period, keeps the phase, and it is different that corresponding pulse number of phase is kept in the different sub field, and in order in one time, to realize more discharge; It is abundant to keep the umber of pulse setting, and then realizes better GTG and brightness.Yet, resetting in signal source, when PAL/NT switches, the field synchronization of signal source is often not accurate enough, causes keeping pulse and overflows, and overflows in case keep pulse, can cause flicker, has a strong impact on user's visual experience.
Summary of the invention
The technical matters that pulse is overflowed of keeping to existing in the prior art the invention discloses a kind of placement and keeps the method that pulse is overflowed.
Technical scheme of the present invention is following:
A kind ofly prevent to keep the method that pulse is overflowed; It specifically comprises following steps: a frame is divided into the N sub-field; Every sub-field have the initialization entire image reset cycle, select sweep trace and addressing period, the keeping the cycle of selected scanning line selection discharge cell according to discharge count measuring representing gradation level; Wherein the reset cycle identical with addressing period, the umber of pulse of keeping of keeping cycle and distribution increases by ratio, is placed on last with keeping the maximum son field of umber of pulse in the frame; Jump along coming then detecting on the field sync signal, carry out reset cycle, addressing period in regular turn and keep the cycle, jump under the field sync signal along coming then detecting, finish this frame and drive, prepare a new frame.
Preferably, above-mentioned this frame of end drives and is specially: the pulse of keeping of last son field is blocked.
Preferably, said method also comprises: finish this frame and drive, when preparing a new frame, input signal is detected on the next field sync signal and is jumped the edge.
Preferably, above-mentioned N is 8,10 or 12.
Beneficial effect of the present invention is: with keep in the frame the maximum son (weight limit) of umber of pulse be placed on last, weight limit to keep umber of pulse maximum, lock in time accident shorten; When might keep pulse and overflow, jump the edge, finish this frame and drive according to detecting under the field sync signal; Prepare a new frame; So, no matter great variation takes place in the field sync period scope, all has synchronous head to exist; Detect under the field synchronization jump along after block and keep pulse, making has reliable signal guarantee.
Description of drawings
Fig. 1 is the method flow diagram that pulse is overflowed that prevents to keep of the present invention.
Embodiment
To combine Figure of description that embodiment of the present invention is specified below.
The method flow diagram that pulse is overflowed that prevents to keep of the present invention as shown in Figure 1.The invention discloses a kind of method that pulse is overflowed that prevents to keep; It specifically comprises following steps: a frame is divided into the N sub-field; Every sub-field have the initialization entire image reset cycle, select sweep trace and addressing period, the keeping the cycle of selected scanning line selection discharge cell according to discharge count measuring representing gradation level; Wherein the reset cycle is identical with addressing period; The umber of pulse of keeping of keeping cycle and distribution increases by ratio, is placed on last with keeping the maximum son field of umber of pulse in the frame; Jump along coming then detecting on the field sync signal, carry out reset cycle, addressing period in regular turn and keep the cycle, jump under the field sync signal along coming then detecting, finish this frame and drive, prepare a new frame.Technique scheme at first with keep in the frame the maximum son (weight limit) of umber of pulse be placed on last, weight limit to keep umber of pulse maximum, lock in time accident shorten; When might keep pulse and overflow, jump the edge, finish this frame and drive according to detecting under the field sync signal; Prepare a new frame; So, no matter great variation takes place in the field sync period scope, all has synchronous head to exist; Detect under the field synchronization jump along after block and keep pulse, making has reliable signal guarantee.
Preferably, said this frame of end drives and is specially: the pulse of keeping of last son field is blocked.A part is blocked in the pulse of keeping of last son field; Can not cause whole sub-field not have discharge; Simultaneously weight limit has the part of discharge must be high bright parts, and human eye is under the bright situation of height, and the variation of brightness can be responsive especially; Only be that transience shortens under the situation of (ms level) lock in time on the scene, the user almost discover less than variation.Use said method, solved dexterously under any condition of cost externally that deviation appears in input picture not increasing, the cycle of frame data changes, the technical matters of the film flicker that causes field sync signal to be overflowed bringing.
Preferably, said method also comprises: finish this frame and drive, when preparing a new frame, input signal is detected on the next field sync signal and is jumped the edge.In synchronizing cycle, following jumping is not kept pulse along very short lock in time to this section on last jumping edge even this section period does not place, and is little to the brightness influence of a frame.
Preferably, said N is 8,10 or 12.The number of son field can carry out confirming flexibly as required, and is convenient for users to use.
Specific embodiment one
Be under 8 the situation, to keep under the pulse situation low at N, the cycle of keeping of the 8th son finishes to also have some times to field synchronization after accomplishing, and is not overflowed even if the pulse of keeping that drive waveforms also can not take place in bigger variation takes place field synchronization.For exhibit high brilliance, under high maintenance pulse situation, the cycle of keeping of the 8th son has approached next field synchronization, shortens suddenly if this moment, field sync period took place, and will cause to keep pulse and overflow.Overflow in case keep pulse, the film flicker phenomenon will occur.
Specific embodiment two
When 256 gray level display images are arranged, will be divided into 10 sub-field corresponding to 1/60 second frame period (16.67ms).10 sub-field are divided into reset cycle, addressing period more respectively and keep the cycle, and the reset cycle of every sub-field is identical with addressing period, suppose that the pulse number of keeping in the cycle of keeping increases with the 2k-1 ratio, and wherein K=(1; 2,3 ..., 8; 9,10), that is, the pulse number of keeping of the first son field is 1; Second the son keep pulse number be 2, the three the son the pulse number of keeping be 4, and the like; The 8th the son keep pulse number be 128, the nine the son keep pulse number be 256, the 10 the son the pulse number of keeping be 512.Jump along coming then detecting on the field sync signal; Carry out first sub, second sub, the 3rd son field in regular turn ... The tenth the son reset cycle, addressing period and keep the cycle; Detect under the field sync signal jump along after, abandon the tenth a son residue and keep pulse, prepare a new frame.Because the tenth son field is the maximum son field of weight in 10 sub-field, therefore, taking place under the situation that lock in time, accident shortened; A part only can be blocked in authority baryon field, and still can discharge in the tenth son field, and the brightness of authority baryon field must be than higher; Under the situation of high brightness; Human eye is insensitive to the variation of brightness, if the field synchronization time is the shortening of transience, and the almost imperceptible variation of user.The present invention abandons follow-up Frame simply, reduces image quality, but at first weight limit field is placed on last, and detect jump under the field sync signal along after, abandon residue and keep pulse, prepare a new frame.Guarantee the processing of new frame data, accomplished the demonstration of these frame data simultaneously again to greatest extent.
Here the present invention is described in detail through concrete examples of implementation; Provide the description of the foregoing description to make or be suitable for the present invention in order to make those skilled in the art, the various modifications of these embodiment are to understand easily for a person skilled in the art.The present invention is not limited to these examples, or some aspect wherein.Scope of the present invention is elaborated through additional claim.
Above-mentioned explanation illustrates and has described a preferred embodiment of the present invention; But as previously mentioned; Be to be understood that the present invention is not limited to the form that this paper discloses, should do not regard eliminating as, and can be used for various other combinations, modification and environment other embodiment; And can in invention contemplated scope described herein, change through the technology or the knowledge of above-mentioned instruction or association area.And change that those skilled in the art carried out and variation do not break away from the spirit and scope of the present invention, then all should be in the protection domain of accompanying claims of the present invention.
Claims (4)
1. one kind prevents to keep the method that pulse is overflowed; It specifically comprises following steps: a frame is divided into the N sub-field; Every sub-field have the initialization entire image reset cycle, select sweep trace and addressing period, the keeping the cycle of selected scanning line selection discharge cell according to discharge count measuring representing gradation level; Wherein the reset cycle identical with addressing period, the umber of pulse of keeping of keeping cycle and distribution increases by ratio, is placed on last with keeping the maximum son field of umber of pulse in the frame; Jump along coming then detecting on the field sync signal, carry out reset cycle, addressing period in regular turn and keep the cycle, jump under the field sync signal along coming then detecting, finish this frame and drive, prepare a new frame.
2. as claimed in claim 1 preventing kept the method that pulse is overflowed, and it is characterized in that said this frame of end driving is specially: the pulse of keeping of last son field is blocked.
3. as claimed in claim 1 preventing kept the method that pulse is overflowed, and it is characterized in that said method also comprises: finish this frame and drive, when preparing a new frame, input signal is detected on the next field sync signal and is jumped the edge.
4. as claimed in claim 1 preventing kept the method that pulse is overflowed, and it is characterized in that said N is 8,10 or 12.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210227943.9A CN102760400B (en) | 2012-07-04 | 2012-07-04 | Method for preventing sustaining pulse from overflowing |
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| CN201210227943.9A CN102760400B (en) | 2012-07-04 | 2012-07-04 | Method for preventing sustaining pulse from overflowing |
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| CN102760400A true CN102760400A (en) | 2012-10-31 |
| CN102760400B CN102760400B (en) | 2015-01-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956189A (en) * | 2012-12-11 | 2013-03-06 | 四川虹欧显示器件有限公司 | Method and device for driving plasma display device |
| CN102956188A (en) * | 2012-12-11 | 2013-03-06 | 四川虹欧显示器件有限公司 | Method and device for fiving plasma display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1433219A (en) * | 2002-01-16 | 2003-07-30 | 汤姆森许可贸易公司 | Video image processing method and device |
| US20050168409A1 (en) * | 2004-02-02 | 2005-08-04 | Jin-Sung Kim | Method for driving discharge display panel based on address-display mixed scheme |
| CN1750092A (en) * | 2005-10-14 | 2006-03-22 | 彩虹集团电子股份有限公司 | Method for improving image quality and contrast of plasma display |
| CN102379001A (en) * | 2009-03-31 | 2012-03-14 | 松下电器产业株式会社 | Plasma display panel and drive method for plasma display panel |
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2012
- 2012-07-04 CN CN201210227943.9A patent/CN102760400B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1433219A (en) * | 2002-01-16 | 2003-07-30 | 汤姆森许可贸易公司 | Video image processing method and device |
| US20050168409A1 (en) * | 2004-02-02 | 2005-08-04 | Jin-Sung Kim | Method for driving discharge display panel based on address-display mixed scheme |
| CN1750092A (en) * | 2005-10-14 | 2006-03-22 | 彩虹集团电子股份有限公司 | Method for improving image quality and contrast of plasma display |
| CN102379001A (en) * | 2009-03-31 | 2012-03-14 | 松下电器产业株式会社 | Plasma display panel and drive method for plasma display panel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102956189A (en) * | 2012-12-11 | 2013-03-06 | 四川虹欧显示器件有限公司 | Method and device for driving plasma display device |
| CN102956188A (en) * | 2012-12-11 | 2013-03-06 | 四川虹欧显示器件有限公司 | Method and device for fiving plasma display device |
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| CN102760400B (en) | 2015-01-07 |
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Granted publication date: 20150107 Termination date: 20160704 |