CN101030344A - Subfield arrangement for descreasing dynamic pseudo-profile - Google Patents
Subfield arrangement for descreasing dynamic pseudo-profile Download PDFInfo
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- CN101030344A CN101030344A CN 200610034069 CN200610034069A CN101030344A CN 101030344 A CN101030344 A CN 101030344A CN 200610034069 CN200610034069 CN 200610034069 CN 200610034069 A CN200610034069 A CN 200610034069A CN 101030344 A CN101030344 A CN 101030344A
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Abstract
A method for decreasing motion pseudo-outline by varying arrangement of subfield includes forming a display cycle by integrating at least two frames, adding a subfield with low and different weight on each frame in said display cycle to form a cycle subfield arrangement mode for making open wire pseudo-outline in the same grey scale at each frame of the same display cycle only occur on a certain frame in said cycle but not occur on the other frames.
Description
Technical field
The present invention relates to a kind ofly adopt sub-displaying mode on flat-panel monitor, to realize the method that many grades of image gray scale shows, particularly a kind ofly can be reduced in a son aligning method that produces dynamic false contours when many grades of image gray scale shows.
Background technology
Some flat-panel monitor, for example: plasma display (PDP) etc., usually a two field picture is divided into a plurality of sub and shows, sub the different brightness with different weights can realize many grades gray scale demonstration of image by the son field combination of different weights.
For example AC plasma display is 256 grades of gray scales of realization, and (sub: English is Subfield, writes a Chinese character in simplified form and is SF usually 1 two field picture to be divided into 8 son fields.SF1 represents the 1st son field, and the rest may be inferred by analogy), the weight relationship of sub-field brightness is: SF1: SF2: SF3: SF4: SF5: SF6: SF7: SF8=1: 2: 4: 8: 16: 32: 64: 128.256 gray shade scales that can obtain between 0～255 by the various combination to these 8 son fields show.Such as: during representing gradation grade 0, SF1～SF8 is all not luminous; During representing gradation grade 127, SF1～SF7 is all luminous, and SF8 is not luminous; During representing gradation grade 128, SF1～SF7 is all not luminous, and SF8 is luminous; When representing gradation grade 255, SF1～SF8 all luminous.
Yet, when adopting above-mentioned sub-field type to realize the demonstration of many grades of image gray scale, motion false contouring (Dynamic False Contour) phenomenon can appear, promptly when showing the black and white moving image, can produce the gray scale disorder; When the display color moving image, also can produce the color disorder.The generation of motion false contouring is the vision physiological feature of human eye and the result who adopts sub-displaying mode combined action.
This phenomenon can illustrate with the still image that shows with sub-field type shown in Figure 1, when this still image moves right, order as the fruit field is SF1: SF2: SF3: SF4: SF5: SF6: SF7: SF8=1: 2: 4: 8: 16: 32: 64: 128 o'clock, human eye can be observed between gray level 127 and gray level 128 and present tangible bright line, its brightness is equivalent to gray level 127+128=255, this just forms so-called false contouring, is called the open-wire line false contouring in this article.
On mechanism, the brightness of pseudo-contour noise is that the time difference in the demonstration with adjacent gray levels is relevant.A kind of method of minimizing false contouring commonly used increases son exactly, dwindles the time difference of adjacent gray levels on showing.If 256 grades of gray scales are represented with 9 son fields, order such as the son field is SF1: SF2: SF3: SF4: SF5: SF6: SF7: SF8: SF9=1: 2: 4: 8: 16: 32: 64: 64: 64, so, during representing gradation grade 127, SF1～SF7 is all luminous, and SF8 and SF9 are not luminous; During representing gradation grade 128, SF1～SF6 and SF9 are all not luminous, and SF7 and SF8 are luminous, and when then image moved right, the brightness of the pseudo-contour noise that is produced was equivalent to gray level 1+2+4+8+16+32+64+64=191, and visible false contouring greatly reduces.The false contouring of dynamic image is the most remarkable in the zone of brightness even transition, the false contouring order of severity be not its absolute brightness, but the relative value of it and surrounding brightness contrast.For example for the demonstration of 256 gray levels, if do not increase the son field, the relative value maximum of open-wire line false contouring approaches 2 so, such as aforesaid 255/127 ≈ 2; After increasing to 9 sons, the relative value maximum that suitable son sequence can obtain the open-wire line false contouring is about 1.69; After increasing to 10 son fields, the relative value maximum that can obtain the open-wire line false contouring is about 1.52.
It is many more that sub-number of fields increases, and the effect that false contouring reduces is good more, but the increase of sub-number of fields and the dutycycle of luminous demonstration are inversely proportional to, and also are restricted, and promptly sub-number of fields is many more, and display brightness is low more.
It is very relevant with the constituted mode of a son sequence to examine the formation of filtering false contouring.Under a stator field type, false contouring only appears between some adjacent gray levels, does not then occur fully between other gray level, under a seed field type, false contouring can occur between certain two gray level; And adopting another seed field type, false contouring does not then just appear between these two gray levels.
In view of this, provide an a kind of improved son arrangement mode, to reduce dynamic false contours.
Summary of the invention
The technical problem to be solved in the present invention is to reduce the motion false contouring by increasing less sub-number of fields.
The method of technical solution problem of the present invention is to form a display cycle by combination at least 2 frames, and the identical Zi Chang position of each frame or most frames in this display cycle increased a son that weight is lower and weight has nothing in common with each other, form a son arrangement mode of one-period.Make each frame in the same display cycle only occur on a certain frame in this cycle at the open-wire line false contouring between same gray level, and on other frame, can not occur, thereby make the open-wire line false contouring on arbitrary gray level significantly reduce, reduce the open-wire line false contouring at the brightness storage effect of human eye.
Compared with prior art, the present invention is by increasing the lower son of weight, improves the arrangement mode of son, can realize with less son, and obtain the bigger improvement of motion false contouring, simultaneously to still image without any influence.
Compare existing fractionation highest weighting to increase the method for son field, only higher gray level there is the effect of improvement, motion false contouring to low gray level is then like water off a duck's back, another remarkable benefit of method provided by the present invention is that the motion false contouring that each gray level produces is all had the reduction effect, and the reduction of dynamic false contours is more comprehensive.
Description of drawings
Fig. 1 is as the human eye of the example mechanism of production to the observing effect synoptic diagram and the motion false contouring of still image;
Fig. 2 is the schematic diagram with minimizing campaign false contouring of the present invention;
Fig. 3 is the gray level expressing method of embodiment of the present invention one.
Embodiment
Describe embodiments of the present invention one in detail below in conjunction with accompanying drawing, see also Fig. 2, this embodiment is shown as example explanation with 256 grades of gray scales.
An improved son constituted mode among explanation the present invention earlier.The weight relationship of 8 son fields that 256 grades of conventional gray scales show is expressed as: SF1: SF2: SF3: SF4: SF5: SF6: SF7: SF8=1: 2: 4: 8: 16: 32: 64: 128.In the present embodiment, odd-numbered frame adopts a conventional son constituted mode, son the constituted mode of even frame is that to increase a weight again at a son lower end of weight on 8 son bases of routine be 1 son, represent that with SF0 the field of promptly new even frame constitutes SF0: SF1: SF2: SF3: SF4: SF5: SF6: SF7: SF8=1: 1: 2: 4: 8: 16: 32: 64: 128.
By improving the constituted mode of son field, make two adjacent frames between same gray level, have different motion false contourings and form the result.Now illustrate with gray level 127,128 and 129.
Odd-numbered frame: these 3 gray levels can be expressed as under 8 sub-field modes of routine:
127＝SF1+SF2+SF3+SF4+SF5+SF6+SF7
128＝SF8
129＝SF1+SF8
This shows that when gray level became 128 by 127, human eye can be observed and present tangible bright line, its brightness is equivalent to gray level 127+128=255, formed the open-wire line false contouring, the relative value maximum of open-wire line false contouring is about 2, and the motion false contouring can not occur between gray level 128 and 129.
Even frame: these 3 gray levels can be expressed as under 9 new sub-field modes:
127＝SF1+SF2+SF3+SF4+SF5+SF6+SF7
128＝SF0+SF1+SF2+SF3+SF4+SF5+SF6+SF7
129＝SF1+SF8
Here as can be seen, the motion false contouring can not occur between the gray level 127 and 128, then the motion false contouring can occur between the gray level 128 and 129, the relative value maximum of its open-wire line false contouring also is about 2.
So when parity frame adopts this two seeds field arrangement mode respectively, make that original is the motion false contouring that produces between gray level 127 and gray level 128, becoming odd-numbered frame now produces between gray level 127 and gray level 128, even frame produces between gray level 128 and gray level 129, the relative value of its brightness greatly reduces although the generation scope of motion false contouring has increased, then the effect of human eye integral mean is at the motion false contouring that all occurs between gray level 127 and 128 and between gray level 128 and 129 reducing by half, the relative value maximum that is the open-wire line false contouring is about 1.5, and the real image display effect has been improved on the contrary.
Another embodiment of the present invention can be a combination (N be one greater than 2 integer) with the N frame, form a display cycle, by adjusting the arrangement mode of each frame field in the same display cycle, make each frame in this display cycle only occur on a certain frame in this cycle at the open-wire line false contouring between same gray level, on other frame, then can not occur, reduced the frequency that the open-wire line false contouring on arbitrary gray level occurs in the same display cycle in this display cycle, thereby make the open-wire line false contouring on arbitrary gray level significantly reduce, improved the influence of open-wire line false contouring at the brightness storage effect of human eye.
Be a combination with 3 frames now, improve a son arrangement mode, details are as follows:
First frame: SF0: SF1: SF2: SF3: SF4: SF5: SF6: SF7: SF8=0: 1: 2: 4: 8: 16: 32: 64: 128 (SF0 not, is the convenience of explanation in this frame, represents with weight 0 at this).
Second frame: SF0: SF1: SF2: SF3: SF4: SF5: SF6: SF7: SF8=1: 1: 2: 4: 8: 16: 32: 64: 128.
The 3rd frame: SF0: SF1: SF2: SF3: SF4: SF5: SF6: SF7: SF8=2: 1: 2: 4: 8: 16: 32: 64: 128.
To an improved son constituted mode, now illustrate with gray level 127,128,129 and 130.
First frame: gray level 127,128,129 and 130 can be expressed as:
127＝SF1+SF2+SF3+SF4+SF5+SF6+SF7
128＝SF8
129＝SF1+SF8
130＝SF2+SF8
This shows that in first frame, the motion false contouring can occur between the gray level 127 and 128, the relative value maximum of open-wire line false contouring is about 2, and the motion false contouring can not occur between gray level 1128,129 and 130.
Second frame: gray level 127,128,129 and 130 can be expressed as:
127＝SF1+SF2+SF3+SF4+SF5+SF6+SF7
128＝SF0+SF1+SF2+SF3+SF4+SF5+SF6+SF7
129＝SF1+SF8
130＝SF0+SF1+SF8
This shows that in second frame, the motion false contouring can occur between the gray level 128 and 129, the relative value maximum of open-wire line false contouring is about 2, and gray level 127 and 128 and gray level 128 and 130 between the motion false contouring can not appear.
The 3rd frame: gray level 127,128,129 and 130 can be expressed as:
127＝SF1+SF2+SF3+SF4+SF5+SF6+SF7
128＝SF0+SF2+SF3+SF4+SF5+SF6+SF7
129＝SF0+SF1+SF2+SF3+SF4+SF5+SF6+SF7
130＝SF2+SF8
This shows that in the 3rd frame, the motion false contouring can occur between the gray level 128 and 129, the relative value maximum of open-wire line false contouring is about 2, and gray level 127 and 128 and gray level 128 and 129 between the motion false contouring can not appear.
When three frames are a combination, when forming a display cycle, by improving the constituted mode of son field, make that original is the motion false contouring that produces between gray level 127 and gray level 128, becoming first frame now produces between gray level 127 and gray level 128, do not produce on other gray level, second frame produces between gray level 128 and gray level 129, do not produce on other gray level, the 3rd frame produces between gray level 129 and gray level 130, do not produce on other gray level, this measure, although make the generation scope of motion false contouring increase, but the relative value of the open-wire line brightness between some gray levels greatly reduces, in gray level 127,128, the motion false contouring that occurs between 129 and 130 will reduce greatly in the effect of human eye integral mean, and promptly the relative value maximum of open-wire line false contouring is about 1.3, has improved the display effect of image.
By parity of reasoning, when being a combination with multiframe more, forms a display cycle, and the brightness relative value of open-wire line false contouring between a certain gray level will further reduce.
In addition, improve a son weight that arrangement mode increased in embodiments of the present invention and be not limited to arrange,, also can arrange in the even number mode as 1,2,3 with natural number, as 2,4,6, or with other continuous ordered series of numbers, as 3,4,5,6 etc.The son that the weight that is increased is lower can be put the lower side of atomic field weight, also can place the higher side of atomic field weight, and the position that institute increases the son field does not influence the effect of reduction open-wire line false contouring.
Should be noted that it is when showing some gray levels, the combination of two or more sons occurs and may preferentially select original son field for use, the son field that is aided with increase again, promptly can all optional time spent in a son weight that increases and an original son weight, preferentially select original son field for use, can roll in gray level under the situation of branch, need gray level is rolled over branch as much as possible, consult Fig. 3, even frame is preferentially selected an original son weight 1 for use display gray scale 3,7 o'clock.
The present invention with plural frame as a combination, form a display cycle, and by wherein most frames being increased a lower son to improve the arrangement mode of son, be a combination with 2 frames or 3 frames as previously mentioned, the effect of improving with 9 sons open-wire line false contouring that demonstration is obtained is equivalent to by partition highest weight baryon field type, the effect that needs 10 son fields just can reach, method provided by the present invention can realize with less son field, and obtain the bigger improvement of motion false contouring, simultaneously to still image without any influence.
Another distinguishing feature of method provided by the present invention is that the motion false contouring that each gray level produces is all had the reduction effect, between gray level 31 and gray level 32, and the motion false contouring between gray level 63 and the gray level 64, and common fractionation highest weighting is to increase the method for son field, only higher gray level there is the effect of improvement, then like water off a duck's back to the motion false contouring of low gray level.
Claims (5)
1, an a kind of son aligning method that reduces dynamic false contours, it is characterized in that combination at least 2 frames form a display cycle, and, form the son field arrangement mode of one-period to each frame in this display cycle or one of most frame increase son field that weight is lower and weight has nothing in common with each other.
2, reduce son the aligning method of dynamic false contours according to claim 1, it is characterized in that institute increase weight lower and weight has nothing in common with each other sub be positioned at the identical Zi Chang position of atomic field.
3, son the aligning method of reduction dynamic false contours as claimed in claim 1 is characterized in that institute increases the son field that weight is lower and weight has nothing in common with each other and is positioned at high or minimum sub-field one end of atomic field weight.
4, reduce son the aligning method of dynamic false contours according to claim 1, it is characterized in that the weight that institute increases weight is lower and weight has nothing in common with each other son comprises 1,2,3, or 2,4,6, or basic its continuous integer is listed as, as 2,3,4,5,6.
5,, when it is characterized in that showing some gray levels,, preferentially select original son field for use in a son weight that increases and an original identical son all optional time spent of weight as a son aligning method of claim 1 to 4 reduction dynamic false contours as described in any one.
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| CN 200610034069 CN101030344B (en) | 2006-02-28 | 2006-02-28 | Subfield arrangement for decreasing dynamic pseudo-profile |
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| CN 200610034069 CN101030344B (en) | 2006-02-28 | 2006-02-28 | Subfield arrangement for decreasing dynamic pseudo-profile |
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| CN101030344B CN101030344B (en) | 2011-09-14 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102449682A (en) * | 2009-05-29 | 2012-05-09 | 全球Oled科技有限责任公司 | Display device |
| CN101226716B (en) * | 2007-12-28 | 2012-11-28 | 彩虹集团公司 | Visual sense analogy method for dynamic false contour effect of pair field display device |
| CN103077682A (en) * | 2013-01-31 | 2013-05-01 | 西安电子科技大学 | LED (Light-Emitting Diode) display screen pulse control method capable of eliminating dynamic false contour |
| CN104637449A (en) * | 2015-03-03 | 2015-05-20 | 深圳市华星光电技术有限公司 | Method for driving AMOLED (active matrix organic light emitting diode) panel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2794563B1 (en) * | 1999-06-04 | 2002-08-16 | Thomson Multimedia Sa | PLASMA DISPLAY PANEL ADDRESSING METHOD |
| CN100399382C (en) * | 2001-09-07 | 2008-07-02 | 中华映管股份有限公司 | Method and device for eliminating dynamic quasi-contour of flat plasma display device |
| CN1588514A (en) * | 2004-08-19 | 2005-03-02 | 彩虹彩色显像管总厂 | Method for reducing dynamic pseudo contour in AC plasma display plate |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226716B (en) * | 2007-12-28 | 2012-11-28 | 彩虹集团公司 | Visual sense analogy method for dynamic false contour effect of pair field display device |
| CN102449682A (en) * | 2009-05-29 | 2012-05-09 | 全球Oled科技有限责任公司 | Display device |
| CN102449682B (en) * | 2009-05-29 | 2015-02-11 | 全球Oled科技有限责任公司 | Display device |
| CN103077682A (en) * | 2013-01-31 | 2013-05-01 | 西安电子科技大学 | LED (Light-Emitting Diode) display screen pulse control method capable of eliminating dynamic false contour |
| CN104637449A (en) * | 2015-03-03 | 2015-05-20 | 深圳市华星光电技术有限公司 | Method for driving AMOLED (active matrix organic light emitting diode) panel |
| WO2016138678A1 (en) * | 2015-03-03 | 2016-09-09 | 深圳市华星光电技术有限公司 | Method for driving active matrix organic light-emitting diode panel |
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