CN100579248C

CN100579248C - Method for measuring falling time and lifting time of motion, and calculating maintaining and starting time difference of motion

Info

Publication number: CN100579248C
Application number: CN200610089008A
Authority: CN
Inventors: 徐康兴
Original assignee: MUDAN SHIYUAN ELECTRONIC CO Ltd BEIJING
Current assignee: MUDAN SHIYUAN ELECTRONIC CO Ltd BEIJING
Priority date: 2006-07-28
Filing date: 2006-07-28
Publication date: 2010-01-06
Anticipated expiration: 2026-07-28
Also published as: CN101115212A

Abstract

The invention discloses a testing card used for measuring a positive and negative bright trailing time/dark trailing time and a corresponding measurement method. The testing cards are characterized in that the testing cards comprise a plurality of graphic units which are cycling and moving at constant speed. Each of the graphic units comprises three graphic blocks, one middle bock and two side blocks, and the certain separation /interleaving distances constitute a first numerical sequence. The measurement method is characterized in that the measurement method tests the trailing time directly in accordance with the image display effects. The testing card can also be used for measuring the lifting and falling time of the movement and calculating the difference between the movement maintaining time and movement starting time. The invention is characterized in that except for the equipment for the testing the signal, no other equipment is in need, which is not only simple and easy to use, and precise enough in measurement to meet the practical requirement, but also provides source basis for other measurement methods.

Description

The method of measurement of motion rise and fall time, motion keep the computational methods with difference start-up time

Technical field

The present invention relates to a kind of method that is used to detect kinds of displays product qualities such as CRT, LCD, PDP, more particularly, the present invention relates to a kind of be used to measure moving image hangover time, rise and fall time and the maintenance of kinds of displays demonstration and the method for measurement that differs from start-up time.

The invention belongs to TV domain display quality method of measurement.

Background technology

Display device for any kind of, after pixel is activated signal excitation, changing to final state brightness by original brightness all can not finish in principle moment, long or short existence postpones and transition, display device that only has such as CRT, this process is extremely short, and the moving image quality of demonstration is close with the rest image quality; Display device that has such as LCD, this process is very long, and the moving image of demonstration has hangover, edge blurry, color displacement sensations such as (or color interruptions).The image deterioration that is caused by image motion is referred to as correction of motion artefacts.In recent years, along with the extensive use of new displays such as LCD, PDP at TV domain, correction of motion artefacts receives the concern of scholar and industry, becomes the focus of many documents.Particularly " live image response time (MPRT) " and corresponding method of measurement thereof become hot issue in the industry and are considered as the significant parameter of live image/moving image.

When formulating the digital television receiver technical standard, consistent think to press for determine a parameter that can be used for the standard moving image quality, natural MPRT becomes the object of consideration.But the extremely complicated measuring equipment of its that cover, loaded down with trivial details test process and numerous factors such as be difficult to that metering is traced to the source make its be difficult to means as commodity inspection.So the effect that we show from image proposes notion and corresponding method of measurement such as hangover time.Contrast and practical proof are found television image by analysis, and hangover time is the optimal parameter of sign moving image quality.

The present invention will serve as theme with conditions of streaking, hangover length, hangover time, and they and motion rise and fall time and maintenance are elaborated with the definition and the method for measurement that differ from start-up time.

Summary of the invention

In view of the foregoing, the purpose of this invention is to provide that a kind of method of measurement is simple, practical, the television image effect of the motion that shows according to display that need not any other equipment is directly measured moving image hangover time, rise and fall time and maintenance and the method that differs from start-up time.

For achieving the above object, the present invention is by the following technical solutions:

A kind of method of measurement of moving the rise time and moving fall time of measuring, this method of measurement are to utilize the test card of the bright hangover time of just measuring/bearing to realize;

Measuring the test card of positive bright hangover time forms by being in than 3 * N on the low-light level background the figure with identical higher brightness; Per 3 figures are formed a graphic element, constitute N graphic element altogether; These graphic elements move along level or vertical direction with the constant speed of every identical mobile d pixel, when they shift out the border, can move into picture from relative border, so move in endless cycles; 3 figures in each graphic element are being spaced perpendicular to the direction of motion is first-class, wherein, the preceding boundary alignment of both sides figure, the back border of a middle figure separates certain distance with the preceding border of both sides figure, the distance that different units separates is inequality, their constitute one-level number sequence row, this one-level number sequence classify as 0.2d, 0.4d, 0.6d ..., 0.2 * N d; With each graphic element corresponding section, marked length reading α on test card, this reading α represents that each graphic element is the distance that the preceding border of back border and both sides figure of the figure in centre of unit separates with d;

Measuring the test card of negative bright hangover time forms by being in than 3 * N on the low-light level background the figure with identical higher brightness; Per 3 figures are formed a graphic element, constitute N graphic element altogether; These graphic elements move along level or vertical direction with the constant speed of every identical mobile d pixel, when they shift out the border, can move into picture from relative border, so move in endless cycles; 3 figures in each graphic element are being spaced perpendicular to the direction of motion is first-class; Wherein, the preceding boundary alignment of both sides figure, the staggered certain distance in the back border of a middle figure and the preceding border of both sides figure, the staggered distance of different units is inequality, their constitute one-level number sequence row, this one-level number sequence classify as 0.2d, 0.4d, 0.6d ..., 0.2 * N d; With each graphic element corresponding section, marked length reading α on test card, this reading α represents that each graphic element is the back border of the figure in centre of unit and the staggered distance in preceding border of both sides figure with d;

It is characterized in that, this method of measurement may further comprise the steps: 1), the output of measuring signal generator and the input port of display to be measured are joined, make measuring signal generator send the test signal that is used to measure bright hangover time with the field frequency of regulation, this test signal demonstrates the figure of measuring bright hangover time test card on display; 2), record the bright hangover time t of display _Ltw3), the tester watches the graphic element that those move on the picture attentively, the graphic element that the end that bright end and the rising on bright of both sides are blured in the middle of finding aligns, the reading α of this graphic element correspondence takes advantage of the field duration to be L1/V; 4), computing t _LtwThe result of-L1/V is motion rise time t _Mrise5), the tester continues to observe, and watches the graphic element that those move on the picture attentively, the graphic element that the front end on bright descend bright of fuzzy front end and both sides aligns in the middle of finding, the reading α of this graphic element correspondence takes advantage of the field duration to be L2/V; 6), computing t _LtwThe result of-L2/V is motion t fall time _Mfall

A kind of method of measurement of moving the rise time and moving fall time of measuring, this method of measurement are to utilize the test card of the dark trailing time of just measuring/bearing to realize;

The test card of measuring positive dark trailing time has identical figure than low-light level and forms by being on the higher brightness background 3 * N; Per 3 figures are formed a graphic element, constitute N graphic element altogether; These graphic elements move along level or vertical direction with the constant speed of every identical mobile d pixel, when they shift out the border, can move into picture from relative border, so move in endless cycles; 3 figures in each graphic element are being spaced perpendicular to the direction of motion is first-class, wherein, the preceding boundary alignment of both sides figure, the back border of a middle figure separates certain distance with the preceding border of both sides figure, the distance that different units separates is inequality, their constitute one-level number sequence row, this one-level number sequence classify as 0.2d, 0.4d, 0.6d ..., 0.2 * N d; With each graphic element corresponding section, marked length reading α on test card, this reading α represents that each graphic element is the distance that the preceding border of back border and both sides figure of the figure in centre of unit separates with d;

The test card of measuring negative dark trailing time has identical figure than low-light level and forms by being on the higher brightness background 3 * N; Per 3 figures are formed a graphic element, constitute N graphic element altogether; These graphic elements move along level or vertical direction with the constant speed of every identical mobile d pixel, when they shift out the border, can move into picture from relative border, so move in endless cycles; 3 figures in each graphic element are being spaced perpendicular to the direction of motion is first-class; Wherein, the preceding boundary alignment of both sides figure, the staggered certain distance in the back border of a middle figure and the preceding border of both sides figure, the staggered distance of different units is inequality, their constitute one-level number sequence row, this one-level number sequence classify as 0.2d, 0.4d, 0.6d ..., 0.2 * N d; With each graphic element corresponding section, marked length reading α on test card, this reading α represents that each graphic element is the back border of the figure in centre of unit and the staggered distance in preceding border of both sides figure with d;

It is characterized in that, this method of measurement may further comprise the steps: 1), the output of measuring signal generator and the input port of display to be measured are joined, make measuring signal generator send the test signal that is used to measure dark trailing time with the field frequency of regulation, this test signal demonstrates the figure of measuring the dark trailing time test card on display; 2), record the dark trailing time t of display _Atw3), the tester watches the graphic element that those move on the picture attentively, the graphic element that the end that the end of phaeodium and the decline of both sides phaeodium are blured in the middle of finding aligns, the reading α of this graphic element correspondence takes advantage of the field duration to be L1/V; 4), computing t _AtwThe result of-L1/V is motion t fall time _Mfall5), the tester continues to observe, and watches the graphic element that those move on the picture attentively, the phaeodium graphic element that the front end of fuzzy front end and both sides phaeodium aligns that rises in the middle of finding, the reading α of this graphic element correspondence takes advantage of the field duration to be L2/V; 6), computing t _AtwThe result of-L2/V is motion rise time t _Mrise

The computational methods of a kind of move retention time and motion actuated time difference, these computational methods are to utilize the test card of the bright hangover time of just measuring/bearing to realize;

It is characterized in that, these computational methods may further comprise the steps: 1), the output of measuring signal generator and the input port of display to be measured are joined, make measuring signal generator send the test signal that is used to measure bright hangover time with the field frequency of regulation, this test signal demonstrates the figure of measuring bright hangover time test card on display; 2), record the bright hangover time t of display _Ltw3), the tester watches the graphic element that those move on the picture attentively, the graphic element that the front end on bright descend bright of fuzzy front end and both sides aligns in the middle of finding, the reading α of this graphic element correspondence takes advantage of the field duration to be L2/V; 4), computing t _LtwThe result of-L2/V is motion t fall time _Mfall5), calculate the poor of motion retention time and motion actuated time, the poor (t of motion retention time and motion actuated time _Mkp-t _Msu) be: t _Mkp-t _Msu=t _Ltw-t _Mfall

The computational methods of a kind of move retention time and motion actuated time difference, these computational methods are to utilize the test card of the dark trailing time of just measuring/bearing to realize;

It is characterized in that, these computational methods may further comprise the steps: 1), the output of measuring signal generator and the input port of display to be measured are joined, make measuring signal generator send the test signal that is used to measure dark trailing time with the field frequency of regulation, this test signal demonstrates the figure of measuring the dark trailing time test card on display; 2), record the dark trailing time t of display _Atw3), the tester watches the graphic element that those move on the picture attentively, the phaeodium graphic element that the front end of fuzzy front end and both sides phaeodium aligns that rises in the middle of finding, the reading α of this graphic element correspondence takes advantage of the field duration to be L2/V; 4), computing t _AtwThe result of-L2/V is motion rise time t _Mrise5), calculate the poor of motion retention time and motion actuated time, the poor (t of motion retention time and motion actuated time _Mkp-t _Msu) be: t _Mkp-t _Msu=-(t _Atw-t _Mrise).

Characteristics of the present invention are: except that test signal, need not any miscellaneous equipment, not only simple, certainty of measurement reaches practical requirement, can also provide tracing basis for other method of measurement.

Description of drawings

Fig. 1 a is the display effect figure of stationary object;

Fig. 1 b is the display effect figure of moving object;

Fig. 2 is positive bright hangover linear measure longimetry schematic diagram;

Fig. 3 is negative bright hangover linear measure longimetry schematic diagram;

Fig. 4 is a kind of positive bright hangover time test card;

Fig. 5 is a kind of negative bright hangover time test card;

Fig. 6 is a kind of positive dark trailing time test card;

Fig. 7 is a kind of negative dark trailing time test card;

Fig. 8 rises for motion and blurs the linear measure longimetry schematic diagram;

Fig. 9 is fuzzy linear measure longimetry schematic diagram for motion descends;

Figure 10 is that colored moving image color is interrupted schematic diagram;

Figure 11 is colored moving image color displacement diagram.

Embodiment

One, the analysis and the measuring principle thereof of moving image conditions of streaking, hangover length, hangover time

1, the conditions of streaking of moving image and the origin cause of formation thereof

At first, people watch live image when (being called moving image again), find that sometimes moving image can lengthening on the direction of motion, and for example ball has become ellipsoid, thereby feels stayed ghost on the background of its back, and this phenomenon is called hangover visually.Afterwards, found again that moving image was not lengthening sometimes but shortens on the direction of motion, thereby felt that background had stayed ghost at its head that this phenomenon still can be called hangover, negative streaking only, and the former more properly is called positive streaking.In addition, what bright object during motion on the dark background and the dark object on the bright background not only trailed varies in size, even the positive and negative of hangover all may be different, therefore should investigate the performance of hangover under these two kinds of conditions to same display.

We analyze the origin cause of formation of bright hangover with Fig. 1 a.As shown in Figure 1a, a bright stationary object (calling bright in the following text) is arranged on dark background, bright has border clearly.When bright motion, if after pixel is activated signal excitation, the variation of brightness can be finished moment, though the moving object picture position of seeing is so changing, the border is still clearly.Can not finish moment if brightness changes, the such display effect of Fig. 1 b then can occur.The bright front end of seeing there is no clear and definite border, and becomes a segment distance CD, and bright brightness becomes a fuzzy interval by secretly brightening gradually in distance C D; Equally, bright rear end do not have clear and definite border yet, becomes a segment distance EF, and bright brightness also becomes a fuzzy interval by bright deepening gradually in distance EF.What also need emphasize is, see bright also consistent foremost with those pixels that are in bright excitation not necessarily of C place foremost, certainly can not be leading, it but is possible postponing, so the square frame that our with dashed lines surrounds is represented the bright this moment physical location on screen, what the pixel in the frame was subjected to so is bright excitation, and what the outer pixel of frame was subjected to then is dark excitation, and AB is physical length.Though the pixel in the AC scope is by bright signal excitation, its brightness does not also rise to background and distinguishes degree mutually; In like manner, though the pixel in the BE scope is encouraged by dark signal, its brightness does not also drop to bright distinguishes degree mutually, and the length of our observed moving object but is CF.

We claim that AB is a physical length, and CF is for observing length, and AC is a start delay length, and CD is the fuzzy length that rises, and BE is for keeping postponing length, and EF is the fuzzy length that descends.Be different from physical length and conditions of streaking just occurs just because of observing length, so the difference that hangover length should equal to observe length and physical length is CF-AB.

Experience is told us, AC, CD, BE, EF reach and (CF-AB) are directly proportional with bright movement velocity, and this conclusion also obtains our experiment and the support of pertinent literature (" Summary of Moving Picture ResponseTime (MPRT) and Futrues ") different aspect.The movement velocity of supposing bright is V, then AC/V, CD/V, BE/V, EF/V and (CF-AB)/V has the time dimension, and they are irrelevant with the movement velocity that is shown object, only change speed with display brightness and the human eye perceives characteristic relevant, so we claim that (CF-AB)/V is hangover time t _TwAnd AC/V, CD/V, BE/V and EF/V be called motion actuated time t _Msu, the motion rise time t _Mrise, the motion retention time t _MkpWith motion t fall time _MfallPrefix " motion " and footnote " _m" be used for emphasizing that these parameters all are according to the observing effect definition of moving image, to distinguish mutually with general liquid crystal response time LD-RT at the LCDs definition.

Can get by Fig. 1 b:

CF-AB＝CB+BE+EF-(AC+CB)＝BE+EF-AC

Be that bright hangover length=maintenance postpones the fuzzy length of length+decline-start delay length (1)

Both members then gets together divided by V:

t _ltw＝t _mkp+t _mfall-t _msu＝t _mfall+(t _mkp-t _msu)

Be bright hangover time=motion fall time+(motion retention time-motion actuated time) (2)

Exchange mutually with background luminance as moving object brightness Fig. 1 b, then corresponding to dark situation of trailing,

Same deduction can get:

The fuzzy length of dark hangover length=start delay length+rising-maintenance postpones length _ (3)

And t _Atw=t _Msu+ t _Mrise-t _Mkp=t _Mrise-(t _Mkp-t _Msu)

Be dark trailing time=motion rise time-(motion retention time-motion actuated time) (4)

By (2), (4) two formulas as seen, what constitute hangover time will have three, and rise time t promptly moves _Mrise, the motion fall time t _MfallPoor (t with motion retention time and motion actuated time _Mkp-t _Msu) (irrelevant with their absolute sizes).

Only there is contribution the motion rise time to dark trailing time, and motion only has contribution to bright hangover time fall time, and their contributions separately all are positive; The difference of motion retention time and motion actuated time all has contribution to bright, dark trailing time, and their contribution but can just can be born, and is positive to the contribution of a certain hangover time, must bear the contribution of another hangover time.Therefore, no matter be bright hangover or dark hangover, may get on the occasion of also getting positive negative value, specifically decide in the characteristic of setting under the condition of work on display.

2, the measuring principle of hangover time

Be the definite speed of describing moving object on the screen, we represent its speed V with every mobile pixel number d of image, if the field duration is T _f, V=d/T then _fAs the length of trailing also is that the reading α of unit represents with d, so hangover time t _Tw

t _Tw=hangover length/speed=α d/ (d/T _f)=α T _f(5)

Formula (5) shows the hangover length alpha that if can to record with every mobile pixel number d be unit, α and field duration T so _f(at TV domain, T in the time of 50 _f=20ms, T in the time of 60 _f=16.67ms) product is hangover time.

So the measurement of time is summed up as measurement of length.Bright length A B can set when modelled signal among Fig. 1 a, however the length of CF since bright the motion, be difficult to correct mensuration.We have designed special test card, though can not measure CF with it, can directly correctly record hangover length (CF-AB) from display screen.Its principle illustrates with Fig. 2.

As shown in Figure 2, object along continuous straight runs motion.Imagination is placed another identical bright P2 below bright P1 of motion, and with identical speed motion.Adjust the position of P2, make P2 the terminal F of observation just in time with the observation front end C vertical alignment of P1.In this example, CF＞AB, at this moment the situation of genus positive streaking is separated before and after the actual front-end A of the actual end B of P2 and P1, and the distance of establishing between them is L, then

L＝BF-AC＝BF+CB-(AC+CB)＝CF-AB (6)

Because the movement velocity of P1, P2 is identical, the relative position of their reality can't be because of still static change of motion, that is, L and P1, the gap length when P2 is static are identical.Can learn that according to Fig. 2 and formula (6) positive streaking can further the image that separates before and after original on the direction of motion, the distance of separating when static especially furthers when motion and just in time joins the distance of separating when positive streaking length just equals static.

Fig. 3 is negative situation corresponding to hangover length.Because BF＜AC, the terminal F of observation that make P2 just in time with the observation front end C vertical alignment of P1, the actual front-end A of the actual end B of P2 and the P1 certain distance L that need forward lap, at this moment

L＝AC-BF＝-(CF-AB) (7)

Can learn that according to Fig. 3 and formula (7) negative streaking can be pushed image folded mutually before and after original on the direction of motion open, overlapping distance is pushed firm nonoverlapping words open when moving when static especially, overlapping distance when negative streaking length just equals static.

Two, the direct measuring method of hangover time

According to above analysis, we have designed test card example as shown in Figure 4 and Figure 5 and have been used for measuring positive and negative bright hangover time respectively.

Fig. 4 is used to measure a kind of test card with just bright hangover time.It is formed by being in than 30 on the low-light level L background panes 1 with identical higher brightness H; Per 3 panes are formed a graphic element 2; 3 panes in every graphic element are uniformly-spaced arranged up and down, upper and lower two preceding borders (determining forward and backward border) alignment according to the direction of motion, middle one back border and two the preceding border up and down certain distance that staggers, the distance that different units staggers is inequality; About 10 graphic elements are divided into two groups.5 graphic elements on the same group are arranged above and below, and are called Unit the 1st, 2,3,4,5 from top to bottom.These figures move with identical constant speed V (every mobile d pixel) along continuous straight runs, when they shift out the border, can move into picture from relative border, so move in endless cycles.Left side group 1 to 5 graphic element, one back border is followed successively by 0.2d, 0.4d, 0.6d, 0.8d and 1.0d with the spacing that two preceding border up and down separates in the middle of each graphic element; Right group 1 to 5 graphic element, one back border is followed successively by 1.2d, 1.4d, 1.6d, 1.8d and 2.0d with the spacing that two preceding border up and down separates in the middle of each graphic element.0.2,0.4 on the left and right sides of test card and the corresponding position of graphic element, marked numerical value: ..., 1.0 and 1.2,1.4 ..., 2.0, these numerical value exactly are exactly spacing be unit representation with every displacement d length scale, i.e. length reading α in the formula (5) separately respectively.

The mark of the top of test card " 1920X1080 (+) ", the expression signal is the high-definition image form of 1920X1080, represents that also this card is to be used for measuring positive hangover time.

Fig. 5 is a kind of test card that is used to measure negative bright hangover time.The composition of its figure is almost completely identical with just bright hangover time test card shown in Figure 4, and difference only is:

Bright back border can be at the rear on two bright preceding borders up and down in the middle of each graphic element, and both are staggered state, and staggered degree has nothing in common with each other.Left side group 1 to 5 graphic element, interleave depth is followed successively by 0.2d, 0.4d, 0.6d, 0.8d and 1.0d; Right group 1 to 5 graphic element, interleave depth is followed successively by 1.2d, 1.4d, 1.6d, 1.8d and 2.0d.In addition, in the mark at figure top, " (+) " becomes " (-) ", represents that this card is used to measure negative hangover time.

The brightness of moving object among Fig. 4 and Fig. 5 is exchanged mutually with background luminance, and promptly background has high brightness H, and the motion phaeodium has low-light level L, then becomes Fig. 6 and Fig. 7, and they are used for measuring positive and negative dark trailing time respectively.

1, the method for measurement of bright hangover time

It is as follows to utilize Fig. 4, test card shown in Figure 5 to measure the method for bright hangover time:

Step 1, the output of measuring signal generator and the input port of display to be measured are joined, make measuring signal generator that (field frequency of 60Hz or other regulation, its corresponding field duration is T with field frequency 50Hz _f) send bright hangover time test signal shown in Figure 4;

Step 2, tester watch the graphic element that those move on the picture attentively, judge that this bright hangover time is positive, still negative? if hangover time is positive, continue execution in step 3, if hangover time is born execution in step 4;

Judge that hangover time just is, still negative foundation is: if bright left margin is drawn close mutually with bright right margin up and down in the middle of each elementary area of the moving image shown in Figure 4 that display to be measured shows; For the less graphic element in original interval, middle bright left margin even can move on to the left side of bright right margin up and down is staggered state; Illustrate that the moving image that display to be measured shows is positive bright hangover really; If bright left margin is pushed open mutually with bright right margin up and down in the middle of each elementary area, then be negative bright hangover;

When step 3, the moving image that shows when display to be measured are positive streak image, the tester watches the graphic element that those move on the picture attentively, find to be in to be interleaved to and separate critical graphic element, that is: the middle bright left margin of graphic element and the graphic element of bright right margin consistency from top to bottom up and down, the bright hangover time that the reading α of this graphic element correspondence takes advantage of the field duration to be to record, t _Tw=α T _f

If do not find just in time to be in critical condition figure unit, two graphic elements are but arranged near critical condition, the mean value of so corresponding reading is measurement result;

If each graphic element all is staggered state, oversize during so bright hangover time, surpassed two field duration (be no to scale, can not use) as television indicator, certainly, if desired, can increase graphic element, with range extension with bigger spacing; Bright hangover time is measured and is finished;

Step 4, the moving image that shows when display to be measured make measuring signal generator that (field frequency of 60Hz or other regulation, its corresponding field duration is T with field frequency 50Hz during for negative streak image _f) send bright hangover time test signal shown in Figure 5;

Step 5, tester watch the graphic element that those move on the picture attentively, and bright left margin is pushed open mutually with bright right margin up and down in the middle of the moving image graphic element shown in Figure 5; For staggered less graphic element, middle bright left margin even can move on to the right side of bright right margin up and down is state separately; For original staggered bigger graphic element, middle bright left margin still is positioned at the left side of bright right margin up and down and interlaced, find to be in and separately be interleaved to staggered critical graphic element, that is: the middle bright left margin and the graphic element of bright right margin consistency from top to bottom up and down, the reading α of this graphic element correspondence takes advantage of the field duration and adds that negative sign is the bright hangover time that records, t _Tw=--α T _f

If each graphic element all is state separately, longly during so negative bright hangover time surpass two field duration, certainly, if desired, can increase graphic element, with range extension with bigger staggered distance; Bright hangover time is measured and is finished.

With the test card of Fig. 6 and Fig. 7, repeat above 1 to 5 step to measure dark trailing time.

2, the method for measurement of moving the rise time and moving fall time

Fig. 8 is the schematic diagram of the fuzzy linear measure longimetry of account for motion rising.Comparison diagram 8 and Fig. 2, difference only is the position of bright P2: the observation front end C consistency from top to bottom of terminal F of the observation of P2 and P1 among Fig. 2, the fuzzy terminal D consistency from top to bottom of rising of terminal F of the observation of P2 and P1 records L1 this moment among Fig. 8

L1＝BF-AD＝BF-AC-CD＝L-CD；CD＝L-L1；

t _mrise＝CD/V＝L/V-L1/V (10)

Be to be the poor of bright hangover time and L1/V the rise time.

Change the position of P2 once more, make the fuzzy front end E of decline of P2 and the observation front end C consistency from top to bottom of P1, record L2 this moment,

L2＝BE-AC＝BE+EF-AC-EF＝L-EF；EF＝L-L2；

t _mfall＝EF/V＝L/V-L2/V (11)

Be to be fall time the poor of bright hangover time and L2/V.

According to Fig. 8, Fig. 9 and (10), (11) formula, motion rise time and the measuring process that moves fall time are as follows:

1, the test card with Fig. 4 or Fig. 5 records bright hangover time t _Ltw

2, still with the test card of Fig. 4 or Fig. 5, and with the same procedure of measuring bright hangover time, but judge in the middle of the criterion of critical alignment changes into up and down that the fuzzy terminal D of bright terminal F and bright rising up and down aligns, this moment, measurement result was L1/V;

3, computing t _LtwThe result of-L1/V is motion rise time t _Mrise

4, also with the test card of Fig. 4 or Fig. 5, and with the same procedure of measuring bright hangover time, but judge in the middle of the criterion of critical alignment changes into up and down that the bright fuzzy front end E that descends aligns with bright front end C up and down, this moment, measurement result was L2/V;

5, computing t _LtwThe result of-L2/V is motion t fall time _Mfall

The analysis showed that similarly the test card of also available Fig. 6 or Fig. 7 is measured the motion rise time and moved fall time, concrete steps are as follows:

1, the test card with Fig. 6 or Fig. 7 records dark trailing time t _Atw

2, still with the test card of Fig. 6 or Fig. 7, and with the same procedure of measuring dark trailing time, but judge that the fuzzy end of the end of phaeodium in the middle of the criterion of critical alignment changes into up and down and the decline of phaeodium up and down aligns, this moment, measurement result was L1/V;

3, computing t _AtwThe result of-L1/V is motion t fall time _Mtall

4, also with the test card of Fig. 6 or Fig. 7, and with the same procedure of measuring dark trailing time, but judge in the middle of the criterion of critical alignment changes into up and down that the phaeodium fuzzy front end that rises aligns with the front end of phaeodium up and down, this moment, measurement result was L2/V;

5, computing t _AtwThe result of-L2/V is motion rise time t _Mrise

3, the calculating of motion retention time and motion actuated time difference

And then, draw the poor (t of motion retention time and motion actuated time by formula (2) _Mkp-t _Msu) be:

t _mkp-t _msu＝t _ltw-t _mfall (12)

Or must by formula (4)

t _mkp-t _msu＝-(t _atw-t _mrise) (13)

So far, bright hangover time t _Ltw, dark trailing time t _Atw, motion rise time t _Mrise, motion t fall time _MfallAnd the poor (t of motion retention time and motion actuated time _Mkp-t _Msu) all record.

It may be noted that:

1, in the above discussion, suppose that all the response characteristic of three primary colors is identical, thereby the motion hangover of black and white object, obscurity boundary all be grey, the practical manifestation of many displays also really so.Yet, can find that also the hangover and the border of band look appear in some displays, response characteristic of these expression three primary colors has nothing in common with each other, more than measuring needs carry out respectively each primary colours, in addition each graphic element up and down two should get different primary colours with one of centre.

2, Fig. 4 has provided the example of positive and negative bright dark trailing time card to Fig. 7, but according to concrete needs, by same principle, can also be designed to the test card of other form, for example, and the test card of movement in vertical direction.

3, high brightness H and the low-light level L among above-mentioned 4 kinds of test card figure is relative value, and concrete numerical value can be set as required.

Three, the----measurement of----color interruption/color displacement is used in the expansion of hangover time method of measurement of the present invention

Two sharply marginated color lumps of next-door neighbour when static, during motion, two color lumps are separated from each other or overlapping phenomenon is called color interruption and color displacement.

The left side of Figure 10 is static situation, the red piece 3 of upper left-hand and blue piece 4 horizontal direction close proximity.Shown in the right, during the motion of image level direction, two color lumps have been separated from each other certain distance 5.Two block graphicses are respectively arranged at the bottom, are used for illustrating that the same quadrat method of the available survey negative streaking of distance is separately measured, only need with each graphic element in Fig. 5 test card up and down bright change redness into, middle bright changes blueness into.This just shows that color is interrupted a kind of performance that is actually the negative streaking phenomenon.If the characteristic of three primary colors is identical, this distance just equals the product of negative bright hangover time and movement velocity.

Figure 11 is the situation of color displacement, be not difficult to find out it be actually bright hangover time on the occasion of a kind of performance, the test card of available Fig. 4 is measured, only need with each graphic element up and down bright change redness into, middle bright changes blueness into.

Hangover time method of measurement disclosed by the invention can correctly record hangover length and the hangover time consistent with human eye perceives according to the display effect of test card, except that test signal, need not any miscellaneous equipment, and precision also reaches practical requirement.The present invention is not only simple, can also provide tracing basis for other method of measurement.Also can be used for the moving measurement of rise time, motion fall time and motion actuated time and the difference of motion retention time of this method, but motion actuated time and motion retention time size separately need be with other method measurements.

What the measurement result of this method reflected is the complete machine effect, and it has comprised display screen and the two-part factor of circuit.The rise and fall time that the pumping signal that provides to display screen is provided is enough little, and the measurement result reflection is the performance of display screen so.

More than discuss, supposed that moving object has enough big size, if the size of moving object than those startups, maintenance length, rises, length is blured in decline or hangover length is also little, more than discussion is obviously inapplicable, need set up other model and inquire into.

The denomination of invention that the present invention and my company submit in October, 2004 is " motion video hangover time test card and a method of measurement thereof ", application number is that 200410083663.0 application for a patent for invention is compared, though the present invention has inherited the technology path of preceding invention, new improvement and expansion are arranged: proposed more to help the graphic element design of correct reading; Can not only measure the positive streaking time and go back the energy measurement negative streaking time; Can not only measure hangover time also energy measurement motion rise time, motion fall time and motion actuated time and the poor of retention time that move; What the tone of figure was not only black and white can also be colored, and hangover time, motion rise and fall time, the motion retention time that can be used for primary colours with start-up time difference measurement and the measurement of color interruption color displacement.

The above is preferred embodiment of the present invention only, and protection scope of the present invention is not limited thereto.Anyly all belong within the protection range of the present invention based on the equivalent transformation on the technical solution of the present invention.

Claims

1, a kind of method of measurement of measuring the motion rise time and moving fall time, this method of measurement are to utilize the test card of the bright hangover time of just measuring/bearing to realize;

Measuring the test card of positive bright hangover time forms by being in than 3 * N on the low-light level background the figure with identical higher brightness; Per 3 figures are formed a graphic element, constitute N graphic element altogether; These graphic elements move along level or vertical direction with the constant speed of every identical mobile d pixel, when they shift out the border, can move into picture from relative border, so move in endless cycles; 3 figures in each graphic element are being spaced perpendicular to the direction of motion is first-class, wherein, the preceding boundary alignment of both sides figure, the back border of a middle figure separates certain distance with the preceding border of both sides figure, the distance that different units separates is inequality, their constitute one-level number sequence row, this one-level number sequence classify as 0.2d, 0.4d, 0.6d ..., 0.2 * Nd; With each graphic element corresponding section, marked length reading α on test card, this reading α represents that each graphic element is the distance that the preceding border of back border and both sides figure of the figure in centre of unit separates with d;

Measuring the test card of negative bright hangover time forms by being in than 3 * N on the low-light level background the figure with identical higher brightness; Per 3 figures are formed a graphic element, constitute N graphic element altogether; These graphic elements move along level or vertical direction with the constant speed of every identical mobile d pixel, when they shift out the border, can move into picture from relative border, so move in endless cycles; 3 figures in each graphic element are being spaced perpendicular to the direction of motion is first-class; Wherein, the preceding boundary alignment of both sides figure, the staggered certain distance in the back border of a middle figure and the preceding border of both sides figure, the staggered distance of different units is inequality, their constitute one-level number sequence row, this one-level number sequence classify as 0.2d, 0.4d, 0.6d ..., 0.2 * Nd; With each graphic element corresponding section, marked length reading α on test card, this reading α represents that each graphic element is the back border of the figure in centre of unit and the staggered distance in preceding border of both sides figure with d;

It is characterized in that this method of measurement may further comprise the steps:

1), the output of measuring signal generator and the input port of display to be measured are joined, make measuring signal generator send the test signal that is used to measure bright hangover time with the field frequency of regulation, this test signal demonstrates the figure of measuring bright hangover time test card on display;

2), record the bright hangover time t of display _Ltw

3), the tester watches the graphic element that those move on the picture attentively, the graphic element that the end that bright end and the rising on bright of both sides are blured in the middle of finding aligns, the reading α of this graphic element correspondence takes advantage of the field duration to be L1/V;

4), computing t _LtwThe result of-L1/V is motion rise time t _Mrise

5), the tester continues to observe, and watches the graphic element that those move on the picture attentively, the graphic element that the front end on bright descend bright of fuzzy front end and both sides aligns in the middle of finding, the reading α of this graphic element correspondence takes advantage of the field duration to be L2/V;

6), computing t _LtwThe result of-L2/V is motion t fall time _Mfall

2, a kind of method of measurement of measuring the motion rise time and moving fall time according to claim 1 is characterized in that: described bright hangover time t _LtwMethod of measurement be:

(1), the output of measuring signal generator and the input port of display to be measured are joined, make measuring signal generator send the test signal that is used to measure positive bright hangover time with the field frequency of field frequency 50Hz, 60Hz or other regulation;

(2), the tester watches the graphic element that those move on the picture attentively, judges that this bright hangover time is positive, and is still negative; If hangover time is positive, continue execution in step (3), if hangover time is born execution in step (4);

Judge that hangover time just is, still negative foundation is: if the intermediate pattern and the both sides figure of each graphic element of moving image that display to be measured shows are drawn close mutually, hangover time is positive so; The intermediate pattern and the both sides figure of opposite each graphic element are pushed open mutually, and hangover time is born so;

When (3), the moving image that shows when display to be measured is positive streak image, the tester watches the graphic element that those move on the picture attentively, the intermediate pattern of each graphic element and both sides figure are drawn close mutually, that have even staggered, find to be in to be interleaved to and separate critical graphic element, that is: the bright hangover time that the perfectly aligned graphic element in border and the preceding border of both sides figure behind the graphic element intermediate pattern, the reading α of this graphic element correspondence are taken advantage of the field duration to be to record;

Bright hangover time is measured and is finished;

(4), the moving image that shows when display to be measured is during for negative streak image, makes measuring signal generator send the test signal that is used to measure negative bright hangover time with the field frequency of field frequency 50Hz, 60Hz or other regulation;

(5), the tester watches the graphic element that those move on the picture attentively, the intermediate pattern of each graphic element and both sides figure can be pushed open mutually because of negative streaking, that have even separately, find and be in separately and staggered critical graphic element, that is: the perfectly aligned graphic element in border and the preceding border of both sides figure behind the intermediate pattern, the reading α of this graphic element correspondence takes advantage of the field duration and adds that negative sign is the negative bright hangover time that records;

Bright hangover time is measured and is finished.

3, a kind of method of measurement of measuring the motion rise time and moving fall time, this method of measurement are to utilize the test card of the dark trailing time of just measuring/bearing to realize;

The test card of measuring negative dark trailing time has identical figure than low-light level and forms by being on the higher brightness background 3 * N; Per 3 figures are formed a graphic element, constitute N graphic element altogether; These graphic elements move along level or vertical direction with the constant speed of every identical mobile d pixel, when they shift out the border, can move into picture from relative border, so move in endless cycles; 3 figures in each graphic element are being spaced perpendicular to the direction of motion is first-class; Wherein, the preceding boundary alignment of both sides figure, the staggered certain distance in the back border of a middle figure and the preceding border of both sides figure, the staggered distance of different units is inequality, their constitute one-level number sequence row, this one-level number sequence classify as 0.2d, 0.4d, 0.6d ..., 0.2 * Nd; With each graphic element corresponding section, marked length reading α on test card, this reading α represents that each graphic element is the back border of the figure in centre of unit and the staggered distance in preceding border of both sides figure with d;

1), the output of measuring signal generator and the input port of display to be measured are joined, make measuring signal generator send the test signal that is used to measure dark trailing time with the field frequency of regulation, this test signal demonstrates the figure of measuring the dark trailing time test card on display;

2), record the dark trailing time t of display _Atw

3), the tester watches the graphic element that those move on the picture attentively, the graphic element that the end that the end of phaeodium and the decline of both sides phaeodium are blured in the middle of finding aligns, the reading α of this graphic element correspondence takes advantage of the field duration to be L1/V;

4), computing t _AtwThe result of-L1/V is motion t fall time _Mfall

5), the tester continues to observe, and watches the graphic element that those move on the picture attentively, the phaeodium graphic element that the front end of fuzzy front end and both sides phaeodium aligns that rises in the middle of finding, the reading α of this graphic element correspondence takes advantage of the field duration to be L2/V;

6), computing t _AtwThe result of-L2/V is motion rise time t _Mrise

4, a kind of method of measurement of measuring the motion rise time and moving fall time according to claim 3 is characterized in that: described dark trailing time t _AtwMethod of measurement be:

(1), the output of measuring signal generator and the input port of display to be measured are joined, make measuring signal generator send the test signal that is used to measure positive dark trailing time with the field frequency of field frequency 50Hz, 60Hz or other regulation;

(2), the tester watches the graphic element that those move on the picture attentively, judges that this dark trailing time is positive, and is still negative; If hangover time is positive, continue execution in step (3), if hangover time is born execution in step (4);

When (3), the moving image that shows when display to be measured is positive streak image, the tester watches the graphic element that those move on the picture attentively, the intermediate pattern of each graphic element and both sides figure are drawn close mutually, that have even staggered, find to be in to be interleaved to and separate critical graphic element, that is: the dark trailing time that the perfectly aligned graphic element in border and the preceding border of both sides figure behind the graphic element intermediate pattern, the reading α of this graphic element correspondence are taken advantage of the field duration to be to record;

Dark trailing time is measured and is finished;

(4), the moving image that shows when display to be measured is during for negative streak image, makes measuring signal generator send the test signal that is used to measure negative dark trailing time with the field frequency of field frequency 50Hz, 60Hz or other regulation;

(5), the tester watches the graphic element that those move on the picture attentively, the intermediate pattern of each graphic element and both sides figure can be pushed open mutually because of negative streaking, that have even separately, find and be in separately and staggered critical graphic element, that is: the perfectly aligned graphic element in border and the preceding border of both sides figure behind the intermediate pattern, the reading α of this graphic element correspondence takes advantage of the field duration and adds that negative sign is the negative dark trailing time that records;

Dark trailing time is measured and is finished.

5, the computational methods of a kind of move retention time and motion actuated time difference, these computational methods are to utilize the test card of the bright hangover time of just measuring/bearing to realize;

It is characterized in that these computational methods may further comprise the steps:

2), record the bright hangover time t of display _Ltw

3), the tester watches the graphic element that those move on the picture attentively, the graphic element that the front end on bright descend bright of fuzzy front end and both sides aligns in the middle of finding, the reading α of this graphic element correspondence takes advantage of the field duration to be L2/V;

4), computing t _LtwThe result of-L2/V is motion t fall time _Mfall

5), calculate the poor of motion retention time and motion actuated time, the poor (t of motion retention time and motion actuated time _Mkp-t _Msu) be:

t _mkp-t _msu＝t _ltw-t _mfall。

6, the computational methods of a kind of move retention time and motion actuated time difference according to claim 5 is characterized in that: described bright hangover time t _LtwMethod of measurement be:

Bright hangover time is measured and is finished;

Bright hangover time is measured and is finished.

7, the computational methods of a kind of move retention time and motion actuated time difference, these computational methods are to utilize the test card of the dark trailing time of just measuring/bearing to realize;

The test card of measuring positive dark trailing time has identical figure than low-light level and forms by being on the higher brightness background 3 * N; Per 3 figures are formed a graphic element, constitute N graphic element altogether; These graphic elements move along level or vertical direction with the constant speed of every identical mobile d pixel, when they shift out the border, can move into picture from relative border, so move in endless cycles; 3 figures in each graphic element are being spaced perpendicular to the direction of motion is first-class, wherein, the preceding boundary alignment of both sides figure, the back border of a middle figure separates certain distance with the preceding border of both sides figure, the distance that different units separates is inequality, their constitute one-level number sequence row, this one-level number sequence classify as 0.2d, 0.4d, 0.6d ..., 0.2 * Nd; With each graphic element corresponding section, marked length reading α on test card, this reading α represents that each graphic element is the distance that the preceding border of back border and both sides figure of the figure in centre of unit separates with d;

2), record the dark trailing time t of display _Atw

3), the tester watches the graphic element that those move on the picture attentively, the phaeodium graphic element that the front end of fuzzy front end and both sides phaeodium aligns that rises in the middle of finding, the reading α of this graphic element correspondence takes advantage of the field duration to be L2/V;

4), computing t _AtwThe result of-L2/V is motion rise time t _Mrise

t _mkp-t _msu＝-(t _atw-t _mrise)。

8, the computational methods of a kind of move retention time and motion actuated time difference according to claim 7 is characterized in that: described dark trailing time t _AtwMethod of measurement be:

Dark trailing time is measured and is finished;

Dark trailing time is measured and is finished.