CN1159688C - Simulated generating middle gradation display device and image signal processing method - Google Patents

Abstract

The present invention relates to simulated generating middle gradation display device and image signal processing method. The display device 1 includes a detection circuit 3, when a change in gradation of one gradation level is detected between adjacent image data, and when it is detected that the numbers of gradations of a plurality of pieces of image data before a gradation change are equal to each other and the numbers of gradations of a plurality of pieces of image data after a gradation change are equal to each other and a conversion circuit 4 provided for performing at least one of the process.

Description

Emulation generates the display device and the image-signal processing method of middle gray

Technical field

The present invention relates to a kind of display device, particularly relate to the LCD that utilization is shown by the view data that constitutes of grey of regulation, plasma (below, be called for short PDP), the display device of electroluminescence (hereinafter to be referred as EL) element etc. and applicable to the image processing method of these display device.

Background technology

In recent years, each field generally uses the display device of LCD (being designated hereinafter simply as LCD) etc.In general the colored LCD that shows adorns the digit driver of 6 bits or 8 bits in of all kinds for R (red), G (green), B (indigo plant).For example, according to the LCD of the digit driver with 8 bits, to 256 gray scales that show of all kinds, integral body can demonstrate 1,670 ten thousand kinds of colors.Yet this type of LCD is as the civilian plain edition monitor of single OA instrument etc., and it is enough for its performance, but as medical treatment, the monitor performance play on the industry of using etc. is still not enough, hope can increase gray scale number.

For example, situation in the old money LCD that 8 used bit image data such as vision signal is input to the digit driver that has only 6 bits, promptly under can the gray-scale displayed bit number than the view data of this display device of the input little situation of the displayable gray scale bit number of display device, adopted (at this moment by the composition that can not show in the view data that makes any 1 pixel, the next 2 bit quantity) in same image frame with (error diffusion frame in) diffusion in the adjacent pixels around it, the method for coming the grey of emulation ground raising display device.In addition, also there is employing in this pixel, to show middle gray in continuous in time every frame, is called so-called FRC technology by any pixel is glimmered.

In recent years, the displayable grey of display device improves, and the incidental LCD of PC carry 8 digital bit drivers also become standard configuration.Thereby, if import 8 bit image data, then do not need just can show with above-mentioned emulation gray scale treatment technology to the LCD of holding 8 digital bit drivers.Yet, as mentioned above, in purposes such as medical treatment, broadcast, raw image data before the input PC also has the situation of 10 bits, under these circumstances, even people require to use the LCD that can only show 8 bit gradation, still can be equivalent to the demonstration of 10 bits.

Supposing, is the LCD of 1024 XGA (ExtendedGraphics Array) mode for the pixel quantity of a sweep trace, infers that the view data with ramp waveform is presented at a situation on the sweep trace.Under the situation of ramp waveform, show 8 bit image data of 256 gray scales, be 0 in the gray scale of sweep trace one end, from one end to the other side, per 4 pixel grey scale numbers increase by 1, to the grey of the other end be 255.When showing like this, be unchallenged for civilian, but for purposes such as medical treatment, broadcasts, minimum resolution for this LCD, the promptly minimum grey of differentiating, gray scale is still bigger than normal by 1 limit that changes, even brightness changes the view data of the mildest ramp waveform, still can find out the border of image.

In general, equal at the gray scale bit number of display device for emulation ground increases the gray scale bit number, can consider to adopt the above-mentioned emulation gray scale treatment technology of error diffusion, FRC etc. in the frame under the situation of gray scale bit number of view data.Yet these technology only are the next bits that mechanically calculates view data, and emulation ground generates middle gray, as mentioned above, still can not adapt to and want the requirement that makes mild grey scale change milder.

Summary of the invention

The objective of the invention is to address the above problem, and a kind of restriction of grey of the view data of not imported is provided, emulation ground generates middle gray, changes display device and the image-signal processing method thereof of realizing that image shows with more natural brightness.

In order to achieve the above object, display device of the present invention has grey scale change pick-up unit and view data converting means, this grey scale change pick-up unit utilizes a plurality of fields or a frame to show a picture on display part, under the situation that the gray scale bit number that gray scale bit number that view data has and above-mentioned display part have equates, when demonstrating than the bigger gray scale bit number of these gray scale bit numbers by above-mentioned display part, in time in a plurality of view data of importing continuously, the grey scale change that between adjacent image data, has a gray scale number, and when the grey that detect a plurality of view data of input before this grey scale change is equal to each other, and the grey of a plurality of view data that are transfused to after this grey scale change sends control signal when being equal to each other; This view data converting means is accepted above-mentioned control signal, carry out following at least a processing, promptly any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data before the above-mentioned grey scale change is transformed into the view data grey after the above-mentioned grey scale change, perhaps, any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data after the above-mentioned grey scale change is transformed into the view data grey before the above-mentioned grey scale change.

So-called " gray scale bit number " is called the bit number of 6 (bits), 8 (bits) etc. of the gray scale of expression display part and view data as described in " prior art ".So-called " grey " is called 6 bits, the data rows that 8 bits constitute by the expression gray scale, for example the data rows of 8 bits " 11111111 " (being 255 gray scales in 10 systems) etc.

For display device of the present invention, the grey scale change pick-up unit is in a plurality of view data of importing continuously in time, the grey scale change that between adjacent image data, has a gray scale number, and the grey that detects a plurality of view data of importing before this grey scale change is equal to each other, and the grey of a plurality of view data that are transfused to after this grey scale change sends control signal when being equal to each other.So-called " grey scale change that between adjacent image data, has a gray scale number; and be equal to each other when the grey that detect a plurality of view data of input before this grey scale change; and be equal to each other at the grey of a plurality of view data that are transfused to after this grey scale change " be the such view data of a part of illustrative ramp waveform in the problem that invention will solve for example, be the mildest situation of grey scale change.

The view data converting means is the control signal of accepting from the output of grey scale change pick-up unit, carry out following at least a processing, promptly any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data before the above-mentioned grey scale change is transformed into the view data grey after the above-mentioned grey scale change, perhaps, any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data after the above-mentioned grey scale change is transformed into the view data grey before the above-mentioned grey scale change.Grey after promptly the grey of the view data before adjacent field or an interframe make grey scale change becomes grey scale change, or the grey that makes the view data after the grey scale change changes the grey become before the grey scale change, makes the grey scale change place data volume that only misplaces in adjacent field or an interframe.So, can discern the view data in the place of grey variation as the middle gray below the gray scale with human eye.Like this, emulation generates middle gray, and the image that can realize having more natural brightness variation shows.

For above-mentioned view data changeable device, requirement can be carried out at least a in following two kinds of processing, the one, carry out conversion by the grey of one or two view data of above-mentioned processing before to above-mentioned grey scale change, the 2nd, carry out conversion by the grey of one or two view data of above-mentioned processing after to above-mentioned grey scale change.

Its reason is that treatment circuit will be more complicated when conversion during as the view data more than three, and circuit scale also will sharply increase.

When each view data of grey scale change pick-up unit two pixels that are positioned at same row of adjacent two row in to display part is sent control signal, wish that the view data converting means carries out the switching of two kinds of mapping modes between the view data of above-mentioned two pixels, these two kinds of mapping modes are the gray scale transformation of variable of the view data before the above-mentioned grey scale change and the gray scale transformation of variable of the view data after the above-mentioned grey scale change.

Its reason, because if supposition constitutes in the multirow (sweep trace) of picture, when before grey scale change or after the grey scale change either party of time of the parallel pixel conversion grey of row (indulge) direction be unanimity, the existence unfavorable phenomenon that vertically can see flicker then.Thereby, in this case, if the place that the side up and down in the pixel determines the conversion grey before grey scale change, and the opposing party is after grey scale change, then solved vertically can see this unfavorable phenomenon of glimmering.

Similarly, grey scale change pick-up unit being positioned at when sending control signal of adjacent two row in to display part with each view data of two pixels of delegation, wish that the view data converting means carries out the switching of two kinds of mapping modes between the view data of above-mentioned two pixels, these two kinds of mapping modes are the gray scale transformation of variable of the view data before the above-mentioned grey scale change and the gray scale transformation of variable of the view data after the above-mentioned grey scale change.

According to this structure, eliminated the horizontal problem that can see flicker.

Image-signal processing method of the present invention is to utilize a plurality of fields or a frame to form the image-signal processing method of picture signal, this method is to carry out at the gray scale bit number that view data has with to this view data under the situation that gray scale bit number that acknowledge(ment) signal side that acknowledge(ment) signal handles has equates, when carrying out the acknowledge(ment) signal processing of the gray scale bit number bigger than these gray scale bit numbers by the acknowledge(ment) signal side, in time in a plurality of view data of importing continuously, the grey scale change that between adjacent image data, has a gray scale number, and the grey of a plurality of view data of input is equal to each other before detecting this grey scale change, and the grey of a plurality of view data that are transfused to after this grey scale change is when being equal to each other, according to testing result, carry out following at least a processing, promptly any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data before the above-mentioned grey scale change is transformed into the view data grey after the above-mentioned grey scale change, perhaps, any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data after the above-mentioned grey scale change is transformed into the view data grey before the above-mentioned grey scale change.

For image-signal processing method of the present invention, at first, detect in a plurality of view data of importing continuously in time, the grey scale change that between adjacent image data, has a gray scale number, and the grey that detects a plurality of view data of importing before this grey scale change is equal to each other, and the fact that the grey of a plurality of view data that are transfused to after this grey scale change is equal to each other.So-called " grey scale change that between adjacent image data, has a gray scale number; and be equal to each other when the grey that detect a plurality of view data of input before this grey scale change; and be equal to each other at the grey of a plurality of view data that are transfused to after this grey scale change " be the such view data of a part of illustrative ramp waveform in the problem that invention will solve for example, be the mildest situation of grey scale change.

Then, according to this testing result, carry out following at least a processing, promptly any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data before the above-mentioned grey scale change is transformed into the view data grey after the above-mentioned grey scale change, perhaps, any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data after the above-mentioned grey scale change is transformed into the view data grey before the above-mentioned grey scale change.

Grey after promptly the grey of the view data before adjacent field or an interframe make grey scale change becomes grey scale change, or the grey that makes the view data after the grey scale change changes the grey become before the grey scale change, makes the grey scale change place data volume that only misplaces in adjacent field or an interframe.So, can discern the view data in the place of grey variation as the middle gray below the gray scale with human eye.Like this, emulation generates middle gray, and the image that can realize having more natural brightness variation shows.

When carrying out the view data conversion process, requirement can be carried out at least a in following two kinds of processing, the one, carry out conversion by the grey of one or two view data of above-mentioned processing before to above-mentioned grey scale change, the 2nd, carry out conversion by the grey of one or two view data of above-mentioned processing after to above-mentioned grey scale change.

Its reason is that treatment circuit will be more complicated when conversion during as the view data more than three, and circuit scale also will sharply increase.

When each view data of acknowledge(ment) signal side two pixels that are positioned at same row of adjacent two row in to display part is sent control signal, wish that the view data converting means carries out the switching of two kinds of mapping modes between the view data of above-mentioned two pixels, these two kinds of mapping modes are the gray scale transformation of variable of the view data before the above-mentioned grey scale change and the gray scale transformation of variable of the view data after the above-mentioned grey scale change.

Its reason, because if supposition constitutes in the multirow (sweep trace) of picture, when before grey scale change or after the grey scale change either party of time of the parallel pixel conversion grey of row (indulge) direction be unanimity, the existence unfavorable phenomenon that vertically can see flicker then.Thereby, in this case, if the place that the side up and down in the pixel determines the conversion grey before grey scale change, and the opposing party is after grey scale change, then solved vertically can see this unfavorable phenomenon of glimmering.

Similarly, acknowledge(ment) signal side being positioned at when sending control signal of adjacent two row in to display part with each view data of two pixels of delegation, wish that the view data converting means carries out the switching of two kinds of mapping modes between the view data of above-mentioned two pixels, these two kinds of mapping modes are the gray scale transformation of variable of the view data before the above-mentioned grey scale change and the gray scale transformation of variable of the view data after the above-mentioned grey scale change.

According to this structure, eliminated the horizontal problem that can see flicker.

Description of drawings

Fig. 1 is the whole square frame figure that constitutes of first embodiment of the invention display device.

Fig. 2 is the square frame figure that the testing circuit formation of this display device is shown.

Fig. 3 is the process flow diagram of explanation testing circuit work.

Fig. 4 be expression in the display device view data and the figure of various signal conditions.

Fig. 5 be the expression second embodiment of the invention display device in view data and the figure of various signal conditions.

Fig. 6 is the square frame figure that the testing circuit formation of this display device is shown.

Fig. 7 is the square frame figure that another example of testing circuit is shown.

Fig. 8 is the process flow diagram of explanation translation circuit work.

Display image in the display device of Fig. 9 A～Fig. 9 C explanation first embodiment of the invention.

Figure 10 illustrates the process flow diagram of second embodiment of the invention work.

Figure 11 is the process flow diagram of the image-signal processing method of explanation third embodiment of the invention.

Embodiment

First embodiment

Below, first embodiment of display device of the present invention is described referring to figs. 1 through Fig. 4.

Fig. 1 is the whole square frame figure that constitutes of display device that present embodiment is shown, and Fig. 2 illustrates the square frame figure that testing circuit constitutes, and Fig. 3 is the process flow diagram of explanation testing circuit work, and Fig. 4 is the constitutional diagram of presentation video data and various signals.

As shown in Figure 1, the display device 1 of present embodiment has by LCD, plasma, electroluminescence, image efferent 2 (display part), testing circuit 3 (grey scale change pick-up unit) and translation circuit 4 (view data converting means) that CRT etc. constitute.This display device 1 is that the gray scale bit number of view data in for example input is 8 bits, when image efferent 2 displayable gray scale bit numbers are 8 bits, can realize that the gray scale that is equivalent to 9 bits shows in emulation ground.

Testing circuit 3 for present embodiment, it is in detecting in time continuously the multiple image of input, the grey scale change that has a gray scale number between adjacent view data, and two view data greys importing before this grey scale change are equal to each other, and the grey of two view data importing after grey scale change sends control signal when being equal to each other.

In addition, as shown in Figure 2, testing circuit 3 has computing circuit 5, holding circuit 6 and decision circuitry 7.The work of testing circuit 3, at first, computing circuit 5 is calculated the view data grey (calculating differential value one time) of input.Then, store the operation result of the grey of computing circuits 5 inputs by holding circuit 6, and be transported to decision circuitry 7.Then, judge by 7 pairs of operation results of sending here from holding circuit 6 of decision circuitry.And the control command of carrying data to send, store to holding circuit 6 according to judged result.Concrete work will be in aftermentioned.

Translation circuit 4 accepts at least a processing of carrying out after the control signal of self-detection circuit 3 in following two kinds of processing, the one, the time is gone up the processing that grey that in two adjacent frames any one make the view data before the grey scale change is for conversion into the grey of the view data after the grey scale change, the 2nd, the time is gone up the processing that grey that in two adjacent frames any one make the view data after the grey scale change is for conversion into the grey of the view data before the grey scale change.For present embodiment,, also can be the formation of changing image data grey between adjacent field though given an example in the formation of interframe changing image data grey.

Below, the work, the particularly work of testing circuit 3 of the display device 1 of above-mentioned formation are described with Fig. 3.

(step S0): respectively the value of N1, N2 is set to zero, start working.

(step S1): whether a plurality of view data of judging input successively are continuous identical data (content means grey, data value at this moment as K).Satisfy under the situation (situation of one-time continuous at least) of the condition of this step S1 and jump to step S2,, then return step S0 not satisfying (all not having of one-time continuous) under this condition.

(step S2): the continuous number N1 of continuous identical data value K among the calculation procedure S1.Whether the continuous number N 1 that judges identical data value K surpasses threshold value N1th.Here, N1th is the arbitrary value from external setting-up, the N1th=2 of present embodiment.Satisfy under the situation (twice continuous situation) of the condition of this step S2 and jump to step S 3,, then keep the N1 value, return step S0 not satisfying under this condition (do not have twice continuous).

(step S3): at the data value of view data of input continuously not simultaneously (when data value is not K, this moment data value as L), calculate between consecutive identical before this data value K and the different data value L poor (=K-L), this difference be the input data minimum value (this minimum value is not 0, but 1 (grey)) under the situation, jump to step S4.This difference is not hour (situations more than 2), then turns back to step S0.

(step S4): S1 is the same with step, judges whether a plurality of view data of input successively are continuous identical data (at this moment, because data value becomes L, therefore, judging whether identical with L).Satisfy under the situation of condition of this step S4 and jump to step S5,, then return step S0 not satisfying under this condition.

(step S5): S2 is the same with step, the continuous number N2 of continuous identical data value L among the calculation procedure S4.Whether the continuous number N2 that judges identical data value K surpasses threshold value N2th.N2th is the same with N1th, is the arbitrary value from external setting-up, the N2th=2 of present embodiment.Satisfy under the situation (twice continuous situation) of the condition of this step S5 and jump to step S6,, return step S0 not satisfying under this condition (do not have twice continuous).

(step S6): from the place that K is varied to L, generate a control signal of carrying out data conversion by decision circuitry 7, and export to translation circuit 4 for data value.Replace the value of N2 with N1, and jump to step S1.

Promptly, display device 1 for present embodiment, if in the continuous gray scale of determining to a certain degree (per at least three data are for fixing before and after the grey scale change), only under the situation of the grey scale change (variation of an ash tolerance) of minimum resolution, factor generates the emulation gray scale according to conversion, even and grey scale change, this grey scale change is more than 2 gray scales, then unreal line data conversion.The result is when having mild brightness to change, and it is milder that this brightness is changed.

Fig. 4 illustrates data waveform figure, and this data waveform figure is in order to illustrate that the grey scale change detection of carrying out with flow process shown in Figure 3 is the work that the view data conversion is carried out on the basis.Symbol 301～306th is by each view data of the time series in the input signal (from 301 to 306) input, the 301,302, the 303rd, the group of identical data value (be worth self can be arbitrarily), the 304,305, the 306th, the group of identical data value.In addition, the difference of these two groups of data values is as the minimum value (grey) of input data.Data value before 301 is different with 301 data value, and externally the N1th of She Dinging, N2th are 2.

If each view data of input signal in order, when 301 data value input, the workflow of Fig. 3 is the state of step S1.

When the data value 302 was transfused to, 302 and 301 data value was because of equating, because satisfied the condition of step S1, so jump to step S2.This moment, N1 was set at 1.

When the data value 303 was transfused to, the data value because of 303 and 302 equated, thus the state of maintenance step S2.At this moment, because of setting N1=2,, jump to step S3 because satisfy the condition of step S2.

When 304 data values were transfused to, 304 is different with 303 data value, and, because of the difference of these data values of 304 and 303 is minimum value 1, because satisfy the condition of step S3, so jump to step S4.

When the data value 305 was transfused to, the data value because of 305 and 304 equated, because satisfied the condition of step S4, so jump to step S5.At this moment, set N2=1.

When the data value 306 was transfused to, the data value because of 306 and 305 equated, keeps the state of step S5.At this moment, because of N2=2,, jump to step S6 because satisfied the condition of step S5.

In step S6, change 304 data value of back (after the grey scale change) with respect to data value, from testing circuit 3 to translation circuit 4 output control signals, so that the data value before changing is carried out conversion process.

In translation circuit 4,304 data values after the data variation are carried out conversion process.In this conversion process, input signal with respect to 301～306, generating 311～316 identical output signal 1 (A frame output signal) of waveform with input signal and the data value of 304 after the data variation is transformed into 321～326 output signal 2 (B frame output signal) of data value before changing, is that unit alternately exports them with the frame.Perhaps, also can field be that unit alternately exports 311～316 output signal 1 and 321～326 output signal 2.

Below, the work of translation circuit 4 is described with reference to Fig. 4 and Fig. 8.

(step SA0): confirm to start working after the control signal of self-detection circuit 3.

(step SA1): judge that the picture signal as process object is A frame or B frame.(the processed frame of work after just having begun as the A frame.)

(step SA2-A): when being the A frame, the data value 301 to 306 of input signal is not carried out conversion process, and they data value 311 to 316 outputs as output signal 1.

(step SA2-B): when being the B frame, only the data value 304 in the data value 301 to 306 of input signal is transformed into and the identical data value of data value 303 before the grey scale change, be data value 324, and data value 321 to 326 outputs of these data after the conversion as output signal 2.

Here, the necessary data value 301 to 306 of data conversion is stored in the storer of translation circuit 4, is used in case of necessity.

(step SA3): judge whether the processing about the process object frame finishes.

When not finishing, jump to step SA0 about the processing of process object frame.

Processing about the process object frame is carried out identical processing repeatedly up to end.

Enter into the processing of step SA4 after the conversion end about the process object frame.

(step SB4): frame number is switched to the next frame sequence number.And jump to step SA0.(when processed frame was the A frame, the next frame sequence number was the B frame, and when processed frame was the B frame, the next frame sequence number was the A frame.)

These output signals 1, output signal 2 is transferred under the situation of image efferent 2, that show (know other characteristic) is 331～336 output signal A,, be high data and the low data that unit alternately demonstrates an ash tolerance promptly with a frame or field corresponding to 314 output signals 1 and 324 output signals 2 of 304 input signal.Then, input picture and image efferent 2 are identified as the gray scale of the minimum resolution that specific energy shows and also want little degree, promptly are positioned at 334 gray scale degree of the centre of 331～333 gray scale degree and 335～336 gray scale degree.Therefore, the grey scale change when 301～306 input signal directly shows is compared, and can obtain the demonstration of milder grey scale change.

Fig. 9 A to Fig. 9 C is the accompanying drawing of display image of the image efferent 2 of explanation display device, and Fig. 9 A shows 311 to 316 o'clock display image of output signal 1 (output signal of A frame), and 311A to 316A is the image corresponding to output signal 311 to 316.Fig. 9 B shows 321 to 326 o'clock display image of output signal 2 (output signal of B frame), and 321B to 326B is corresponding to output signal 321.

In addition, Fig. 9 C is in order to compare the display image of usefulness at 301 to 306 o'clock with demonstrating input signal same as before, and 301N to 306N is the image corresponding with input signal 301 to 306.

Like this, when Alternation Display A frame and B frame display image, compare, can see the display image that grey scale change is milder with not carrying out the such grey scale change of Fig. 9 C.

Perhaps, the data value of the input signal of 303 before can changing data carries out the data value of conversion process 304 after replacing as described above data being changed and carries out conversion process.That is, during the processing of the data value after the data value of 303 of (before the grey scale change) input signal is transformed into data variation before having carried out data variation, obtain 341～346 output signal 3 (output signal of B frame).During when combination above-mentioned output signal 1, output signal 3 and with frame unit or field unit's Alternation Display, evident characteristics becomes 351～356 output signal B, and is the same with the situation of output signal A, can obtain seeming the demonstration of milder grey scale change.

Perhaps, also can carry out conversion process to any one value that the front and back both sides carry out the data value of 304 behind 303 data values, data variation before conversion process replaces as mentioned above only data being changed.Promptly, for a frame (A frame) side wherein, during the processing of the data value after 303 of (before the grey scale change) data value is transformed into data variation before having carried out data variation, obtain 361～366 output signal 4, for another frame (B frame), when 304 of (after the grey scale change) data value is transformed into the processing of the preceding data value of data variation after having carried out data variation, obtain 371～376 output signal 5.During when combination above-mentioned output signal 4, output signal 5 and with frame unit or field unit's Alternation Display, evident characteristics becomes 381～386 output signal C, compares with the situation of output signal A, output signal B, can obtain the demonstration of milder grey scale change.

Second embodiment

Below, second embodiment of display device of the present invention is described with reference to Fig. 5 to Fig. 7.

The display device of present embodiment constitutes identical with the formation of first embodiment, with the difference of first embodiment just in display part adjacent two pixels that are positioned at same column of two row up and down exist under the situation that same grayscale changes, example goes out distinctive data conversion method.Thereby the integral body of below having omitted display device constitutes, the detailed description of the formation of testing circuit etc., with Fig. 5 the flow process of work, the wherein state of Fig. 5 presentation video data and various signals only is described.

In the present embodiment, symbol 401～406 shown in Figure 5 is identical input signal, and these input signals are to be imported into the adjacent signal of two sweep traces (n capable (even number line) and n+1 (odd-numbered line)) up and down in the image efferent 2 here.Function as testing circuit 3, with the formation of first embodiment serve as that the basis is detected the grey scale change that each bar sweep trace carries out minimum resolution similarly with flow process shown in Figure 3, exist under such grey scale change situation, to the intrinsic control signal of translation circuit 4 outputs.

For present embodiment, it constitutes with behavior unit to change grey in which forward and backward stage switching of grey scale change.For example, before the capable grey scale change of n, after the capable grey scale change of n+1, switch.More particularly, the formation of these translation circuit 4 input sync signals that can put down in writing to Fig. 1 from the outside as illustrated in fig. 6 realizes.

That is, the translation circuit 4 of Fig. 6 has data conversion circuit 8 and shifts one's position and adjust circuit 9.Picture signal is input in the data conversion circuit 8, adjusts in the circuit 9 and synchronizing signal input shifted one's position.Owing to being shifted one's position, the synchronizing signal input adjusts in the circuit 9, be that n is capable or the capable corresponding control signal of n+1 is input to data conversion circuit 8 then with the row of having imported picture signal, in data conversion circuit 8, if n is capable then to change grey before grey scale change, if the capable grey that then after grey scale change, changes of n+1.According to such formation, though the same grey scale change that mutually same gray scale is arranged once in a while that lists on adjacent two sweep traces, at n capable and n+1 capable on, the place that the changes grey data volume that also just misplaces.

Below, utilize the work of Fig. 5 and Figure 10 key diagram 6 translation circuits 4.

(step SB0): confirm to start working after the control signal of self-detection circuit 3.

(step SB1): judge that the picture signal as process object is A frame or B frame.(the processed frame of work after just having begun as the A frame.)

(step SB2-A): when being the A frame, then, the judgment processing object is capable to be that n is capable or n+1 is capable.

(step SB3-A): the process object row is n when capable, and the data value 401 to 406 of input signal is not carried out conversion process, and they data value 411 to 416 outputs as output signal 1.

(step SB3-B): when the process object row is n+1, only the data value 403 in the data value 401 to 406 of input signal is transformed into and the identical data value of data value 404 after the grey scale change, be data value 443, and data value 441 to 446 outputs of these data after the conversion as output signal 3.

(step SB2-B): when being the B frame, then the judgment processing object is capable is that n is capable or n+1 is capable.

(step SB3-C): the process object row is that n is when capable, only the data value 404 in the data value 401 to 406 of input signal is transformed into and the identical data value of data value 403 before the grey scale change, be data value 424, and data value 421 to 426 outputs of these data before the conversion as output signal 2.

(step SB3-D): process object is n+1 when capable, and the data value 401 to 406 of input signal is not carried out conversion process, and they data value 451 to 456 outputs as output signal 4.

, to step SB3-D, the necessary data value 401 to 406 of data conversion is stored in the storer of data conversion circuit 8 at step SB3-A, is used in case of necessity.

(step SB4): whether judgement finished about the conversion of the row of process object after any one step of (step SB3-A) to (step SB3-D) finished.

When not finishing, jump to step SB0 about the conversion of process object row.

Conversion about the process object row is carried out identical processing repeatedly up to end.

Enter into step SB5 after the conversion end about the process object row.

(step SB5): after the conversion end about the process object row, the row sequence number is switched to the capable sequence number of next bar.

(step SB6): whether the processing that the judgment processing object is capable finishes.

When not finishing, jump to step SB0 about the processing of process object row.

Processing about the process object row is carried out identical processing repeatedly up to end.

Enter into step SB7 after the processing end about the process object row.

(step SB7): frame number is switched to the next frame sequence number.And jump to step SB0.(when processed frame was the A frame, the next frame sequence number was the B frame, and when processed frame was the B frame, the next frame sequence number was the A frame.)

Perhaps, also can be as shown in Figure 7, replace from the structure of translation circuit 4 outside input sync signals by the timer (counter) 10 that certain hour (1 leveled time is at interval) sends the control signal of switching the grey change location one of indoor design.Constitute with this, also can obtain effect same as described above.

Like this, by having designed the formation of switching the position that changes grey with behavior unit, just can not need storage line data ground to realize the display device of present embodiment.

To this, the mechanism of storage line data specially is set for every row, and comparing data between being expert at, detect the grey scale change that each is gone simultaneously, on this basis, also may command makes the position of grey scale change.

Then, with the work of Fig. 5 key diagram of data waveform as data conversion is shown.

During from above-mentioned testing circuit input control signal, in translation circuit 4, at first, capable to n, input signal with respect to 401～406, generation is 411～416 identical output signal 1 (output signal of A frame) of the waveform with input signal and is 421～426 the output signal 2 (output signal of B frame) that 404 data values after the data conversion is transformed into the waveform of the data value before changing, is that unit makes the alternately output of these data with the frame.Perhaps, also can field be unit with 411～416 output signal 1 and 421～426 alternately output of output signal 2.

When these output signals 1, when output signal 2 is transported to image efferent 2, show that (evident characteristics) becomes 431～436 output signal A.That is, output signal 1 according to corresponding with 404 input signal 414 and 424 output signal 2, just can frame unit or field unit alternately show ash high data of tolerance and low data.Thereby, just can be with the degree also littler than the gray scale of displayable minimum resolution, promptly can discern input image data and image efferent 2 with 434 gray scale degree of the centre of the gray scale degree that is positioned at 431～433 gray scale degree and 435～436.

On the other hand, capable to n+1, input signal with respect to 401～406, generation is 441～446 output signal 3 (output signal of A frame), 451～456 the output signal 4 (output signal of B frame) identical with being waveform with input signal that 403 data values before the data conversion is transformed into the waveform of the data value after the variation, is that unit makes the alternately output of these data with the frame.Perhaps, also can field be unit with 441～446 output signal 3 and 451～456 alternately output of output signal 4.

When these output signals 3, when output signal 4 is transported to image efferent 2, show that (evident characteristics) becomes 461～466 output signal B.That is, output signal 3 according to corresponding with 403 input signal 443 and 453 output signal 4, just can frame unit or field unit alternately show ash high data of tolerance and low data.Thereby, just can be with the degree also littler than the gray scale of displayable minimum resolution, promptly can discern input image data and image efferent with 464 gray scale degree of the centre of the gray scale degree that is positioned at 461～462 gray scale degree and 464～466.

The result is that the evident characteristics on the capable image efferent of n is 431～436 output signal A, and the evident characteristics on the capable image efferent of n+1 is 461～466 output signal B.That is,, have place that same grayscale changes and be on the position that is positioned at same column (with vertically parallel), if see the place of output signal A, B, then with local transversion malposition 1 data volume of middle gray degree identification in the original input signal stage.

Like this, on adjacent up and down two sweep traces with vertically parallel two pixels in, have under the situation of grey scale change of mutually same gray scale amount, if with the visible place of middle gray degree also with vertically parallel, then can produce flicker on the image in this section.Thereby, the situation of present embodiment since with the place of middle gray degree identification because of the sweep trace transversion malposition, so can prevent above-mentioned flicker.

In the present embodiment, in such a way, promptly, capable for n, make the output signal 1 of A frame become the waveform identical with input signal, output signal 2 according to input signal conversion B frame, in addition, capable for n+1, make the output signal 4 of B frame become the waveform identical with input signal, and according to the output signal 3 of input signal conversion A frame, make capable and n+1 allow on capable output signal become respectively and have nothing in common with each other with the frame of input signal same waveform as with according to the frame of input signal conversion output signal at n, but also can n capable with allow output signal become on n+1 is capable to replace above formation with the frame of input signal same waveform as with according to the identical formation of the frame of input signal conversion output signal.

In the present embodiment, adjacent two pixels that are arranged in same column of two sweep traces up and down in image efferent 2, have under the grey scale change situation of an identical ash tolerance, although understand according to an example of exercising with the local transversion malposition of middle gray degree identification, but identical with it be can certainly on the direction of half-twist in length and breadth.Promptly, for two pixels on colleague's (sweep trace) mutually of being positioned in the image efferent 2 towards adjacent two signal line of longitudinal extension, have under the grey scale change situation of mutually same gray scale amount, making can be towards vertical dislocation according to signal wire with the place of middle gray degree identification.Be provided with like this,, can prevent from laterally to produce flicker with above-mentioned the same.

The 3rd embodiment

Below, with reference to Figure 11 image-signal processing method of the present invention is described.

The embodiment of this image-signal processing method is to be made of trace routine 102 and image data converting program 103, trace routine 102 detects the adjacent image data that be transfused to view data 101 identical with the input signal of Fig. 4, for example the adjacent data 302 of the input signal of Fig. 4 and 303 change and grey, image data converting program 103 is the testing results based on trace routine 102, the grey of changing image data 101, and the identical image data processing 104 of the output signal 1,2 of output and Fig. 4.

Trace routine 102 and image conversion program 103 are the programs that are applicable on the display device shown in Figure 1.Trace routine 102 is carried out in testing circuit 3, and its concrete content is that the program shown in the flow process with Fig. 3 is identical.In addition, image data converting program 103 is being to carry out in translation circuit 4, and its concrete content is that the program shown in the flow process with Fig. 8 is identical.Thereby, no longer trace routine 102 and image data programs 103 are elaborated herein.

But technical scope of the present invention is not limited only in the scope of the foregoing description, without departing from the spirit and scope of the present invention, can make various improvement.For example, in above-mentioned enforcement, though show the example of the grey conversion process of the grey conversion process of carrying out a view data before the grey scale change or a view data after the grey scale change, also can adopt the formation of the grey conversion of the grey conversion of two view data before the grey scale change or two view data after the grey scale change.In addition, before and after grey scale change, the continuous data number of certain grey can be more than three of the foregoing description, as long as do suitable setting.In addition, the design that can do to suit to the concrete formation in inside of the testing circuit of realizing theory of the present invention, translation circuit etc.

In addition, image-signal processing method of the present invention is applicable on the display device, and, also applicable on the image processing system of computing machine and view data relay etc.

Aforesaid detailed description, in the display device of the present invention, in continuous gray scale to a certain degree, have under the situation of grey scale change (a gray scale quantitative changeization) of minimum resolution, according to field or a frame transform near grey scale change local view data is arranged, so be used as to the local emulation of conversion the following middle gray identification of a gray scale, can realize having the image demonstration that more natural brightness changes.

Claims (8)

1. display device, it is characterized in that, this display device has grey scale change pick-up unit and view data converting means, above-mentioned grey scale change pick-up unit utilizes a plurality of fields or a frame to show a picture on display part, under the situation that the gray scale bit number that gray scale bit number that view data has and above-mentioned display part have equates, when demonstrating than the bigger gray scale bit number of these gray scale bit numbers by above-mentioned display part, in time in a plurality of view data of importing continuously, the grey scale change that between adjacent image data, has a gray scale number, and when the grey that detect a plurality of view data of input before this grey scale change is equal to each other, and the grey that detects a plurality of view data that are transfused to after this grey scale change sends control signal when being equal to each other; Above-mentioned view data converting means is accepted above-mentioned control signal, carry out following at least a processing, promptly any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data before the above-mentioned grey scale change is transformed into the view data grey after the above-mentioned grey scale change, perhaps, any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data after the above-mentioned grey scale change is transformed into the view data grey before the above-mentioned grey scale change.

2. display device according to claim 1, it is characterized in that above-mentioned view data changeable device carries out at least a in following two kinds of processing, the one, according to the described processing in the claim 1, grey to one or two view data before the above-mentioned grey scale change carries out conversion, the 2nd, according to the described processing in the claim 1, the grey of one or two view data after the above-mentioned grey scale change is carried out conversion.

3. display device according to claim 1, it is characterized in that when each view data of above-mentioned grey scale change pick-up unit two pixels that are positioned at same row of adjacent two row in to above-mentioned display part is sent control signal, above-mentioned view data converting means carries out the switching of two kinds of mapping modes between the view data of above-mentioned two pixels, these two kinds of mapping modes are the gray scale transformation of variable of the view data before the above-mentioned grey scale change and the gray scale transformation of variable of the view data after the above-mentioned grey scale change.

4. display device according to claim 1, it is characterized in that above-mentioned grey scale change pick-up unit being positioned at when sending control signal of adjacent two row in above-mentioned display part with each view data of two pixels of delegation, above-mentioned view data converting means carries out the switching of two kinds of mapping modes between the view data of above-mentioned two pixels, these two kinds of mapping modes are the gray scale transformation of variable of the view data before the above-mentioned grey scale change and the gray scale transformation of variable of the view data after the above-mentioned grey scale change.

5. image-signal processing method, this method is to utilize a plurality of fields or a frame to form the image-signal processing method of picture signal, this method is gray scale bit number that view data has and above-mentioned this view data being carried out under the situation that gray scale bit number that acknowledge(ment) signal side that acknowledge(ment) signal handles has equates, when carrying out the acknowledge(ment) signal processing of the gray scale bit number bigger than these gray scale bit numbers by above-mentioned acknowledge(ment) signal side, in time in a plurality of view data of importing continuously, the grey scale change that between adjacent image data, has a gray scale number, and the grey of a plurality of view data of input is equal to each other before detecting this grey scale change, and the grey of a plurality of view data that are transfused to after this grey scale change is when being equal to each other, according to testing result, carry out following at least a processing, promptly any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data before the above-mentioned grey scale change is transformed into the view data grey after the above-mentioned grey scale change, perhaps, any one or the time in two adjacent fields of going up time is gone up the processing that grey that any frame in the two adjacent frames makes the view data after the above-mentioned grey scale change is transformed into the view data grey before the above-mentioned grey scale change.

6. image-signal processing method according to claim 5, it is characterized in that when carrying out the view data conversion process, carry out at least a in following two kinds of processing, the one, according to the described processing in the claim 5, grey to one or two view data before the above-mentioned grey scale change carries out conversion, the 2nd, according to the described processing in the claim 5, the grey of one or two view data after the above-mentioned grey scale change is carried out conversion.

7. image-signal processing method according to claim 5, it is characterized in that when each view data of acknowledge(ment) signal side two pixels that are positioned at same row of adjacent two row in to display part is sent control signal, carry out the switching of two kinds of mapping modes between the view data of above-mentioned two pixels, these two kinds of mapping modes are the gray scale transformation of variable of the view data before the above-mentioned grey scale change and the gray scale transformation of variable of the view data after the above-mentioned grey scale change.

8. image-signal processing method according to claim 5, it is characterized in that acknowledge(ment) signal side being positioned at when sending control signal of adjacent two row in display part with each view data of two pixels of delegation, carry out the switching of two kinds of mapping modes between the view data of above-mentioned two pixels, these two kinds of mapping modes are the gray scale transformation of variable of the view data before the above-mentioned grey scale change and the gray scale transformation of variable of the view data after the above-mentioned grey scale change.

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