CN101567166A - Method for modulating non-uniform interval blanking scan time series of time slices of flat panel display - Google Patents
Method for modulating non-uniform interval blanking scan time series of time slices of flat panel display Download PDFInfo
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Abstract
The invention relates to a method for modulating non-uniform interval blanking scan time series of time slices of a flat panel display; the method comprises the steps: when n time slices (T'CLK) are scanned in a line scan period TS/L, n-1 non-uniform blanking time intervals (Ttimesliceblanking) are inserted among the time slices T' CLK, with an expression: TS/L=n multiplied by T'CLK+Ttimesliceblanking, wherein the Ttimesliceblanking is the sum of n-1 non-uniform blanking time intervals. As n-1 non-uniform blanking time intervals are inserted among the time slices, the control of the refresh frequency of the display is more flexible, thus improving the refresh frequency of the display and the dynamic stability of images.
Description
Technical field
The present invention relates to a kind of panel display screen scan time series modulator approach, particularly a kind of non-uniform interval blanking scan time series of time slices of flat panel display modulator approach.
Background technology
The display brightness of panel display screen LED has two kinds of control methods.A kind of is to change the electric current that flows through LED; Another kind method is to utilize the visual persistence of human eye, realize gray-scale Control with pulse duration modulation method, periodically-varied light impulse length (being dutycycle) just, as long as this cycle that repeats to light enough lack (being that refreshing frequency is enough high), human eye is that imperceptible light-emitting pixels is being shaken.Because width modulation is more suitable in digital control, at present nearly all LED screen all is to adopt width modulation to control gray shade scale.
Currently used standard time sheet scanning gray level control method is each period T with counter output
CLKThe unit period control procedure (timeslice) of regarding a no gray level as, the method for employing serial transmission is in each period T
CLKIn this raw column data is formed the column data of this cycle correspondence by comparer, pass toward row driver.In general, this process is the process of overlapping processing, promptly in each column data that shows this cycle of one's own profession, prepares the period 1 data (showing that one's own profession is during last cycle) of each column data or the next line of next cycle, the period T of this moment
CLKBe actually one sweep time sheet, the display driver process in this cycle is identical with the display screen of no gray scale, all cycles of repeat counter output will be finished the gray scale demonstration of display screen.
The weight-value time-slice that utilizes that adopts at present carries out the control method of gray level scanning, is to utilize weight-value time-slice D[i] in the unit interval, display screen is repeatedly scanned (claiming again to refresh) repeatedly, thus be formed with the video image of gray level level; The ON time of each LED has adopted the method for weighted sum, for the gray-scale value R[MSB:LSB of any one LED pixel], a unique weighting time T is all arranged
R[MSB:LSB]Corresponding with it, be expressed as
The D[i of the value of i-k more than or equal to zero time wherein] time of occupying be one reference time sheet, general LSB=0.This method is called the weight-value time-slice scan method again, and (generally speaking, video shows that single primary colours data are 8bit, i.e. 256 gray levels, and LED shows that the gray level that can control generally is greater than 256 gray scales at present, i.e. 8bit; Be limited to 65536,16bit on the gray level that the background technology supposition LED demonstration here can be controlled; In fact can also be bigger.I represents to weigh the minimum timeslice of timeslice here, and for example video data is 8bit, and LED shows that the i minimum was 7, is 15 to the maximum when the gray level that can control was 16bit; One has 8 big chronomeres, for D7 arrives D15, if under the situation of k=0, D7 time corresponding sheet is 256, D15 time corresponding sheet is 32768, total timeslice and be 65535, this is a special case) for bonding gradation level be at least 256 and single gradation level reach 65536, desirable 7≤C≤15 for high energy; C is the difference of MSB and LSB; K is a constant, for making the fine and smooth more of image appearance, desirable 0≤k≤9.When the value of i-k less than 0 the time, each weight-value time-slice occupy separately one reference time sheet, just in this sheet reference time the LED demonstration time have only one reference time sheet 2
I-kDoubly, some or most of the time are by blanking.
Though this method has improved the refreshing frequency of display screen, when the value of i-k smaller or equal to 0 the time, in the reference time sheet LED demonstration time have only one reference time sheet 2
I-kDoubly, some or most of the time are by blanking, and pixel continues to light when scanning with complete timeslice continuously, thereby phenomenon occurs flashing when scanning with different weight-value time-slices, and the image dynamic stability of demonstration is relatively poor.
In addition, the Chinese patent communique also discloses " a kind of flat panel display screen line time slice distribution recombination scanning and modulating method " (patent No.: 200510016793.7; Open day: 2006.11.22), the technical scheme that this method adopts is: the numerical value of selecting k, with scan area is scan period of the basic driver dot matrix of L * V to be divided into k stage, in each stage the basic driver dot matrix is finished the single pass process, new line-scanning period T
L'=T
s/ (Lk), finish n in the new line-scanning period
s' modulation; T wherein
sFor scan area is the frame period of the basic driver dot matrix of L * V, L is the number of scanning lines of basic driver dot matrix, and V is the scanning columns of basic driver dot matrix, and the gray-scale displayed level is n
s, k is less than n greater than 1
sPositive integer, n
sCan be divided exactly n by k
s=kn
s', n
s' be positive integer; Whenever after finishing the scanning process in a stage, carry out the scanning in next stage, until the scanning process of finishing k stage.
Though time slice distribution recombination scanning and modulating method has increased the speed of display refreshing, in some cases, still there is the situation of refreshing frequency deficiency, the image dynamic stability of demonstration is relatively poor.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of non-uniform interval blanking scan time series of time slices of flat panel display modulator approach that can improve the display refreshing frequency, increase display image dynamic stability degree.
In order to solve the problems of the technologies described above, non-uniform interval blanking scan time series of time slices of flat panel display modulator approach of the present invention is at line-scanning period T
S/ L scans n timeslice T ' in the time
CLKThe time, at each timeslice T '
CLKBetween insert n-1 non-homogeneous blanking time at interval, expression formula is
T
S/ L==n * T '
CLK+ T
Blanking between timeslice(1)
T wherein
Blanking between timesliceBe n-1 T.T. at interval non-homogeneous blanking time.
Time T for m non-homogeneous timeslice blanking
mAdopt the linear growth method to be defined as:
T
m=(2m/n (n-1)) T
Blanking between timeslice
Perhaps adopt the weights growing method to be defined as:
T
m=(1/2
N-m+ 1/2
N-1(n-1)) T
Blanking between timeslice
Formula (1) can also be expressed as
T
S/ L=T '
S/ L+T
Blanking between timeslice
Perhaps T
S=T '
S+ T
Blanking between timeslice* L
In order to keep certain brightness, n-1 non-homogeneous blanking time T.T. T at interval
Blanking between timesliceBe no more than T '
CLK
Beneficial effect: the present invention inserts n-1 non-homogeneous blanking time at interval between each timeslice, the control of the refreshing frequency of display is more flexible, has improved display screen brush dynamic frequency, has improved the dynamic stability of image.
The present invention can also select the numerical value of k, is the scanning frame period T of the basic driver dot matrix of L * V with scan area
sBe divided into k stage, in each stage, the basic driver dot matrix finished the single pass process; New line-scanning period T
L'=T
s/ (Lk), finish n in the new line-scanning period
s' modulation; L is the number of scanning lines of basic driver dot matrix, and V is the scanning columns of basic driver dot matrix, and the gray-scale displayed level is n
s, k is less than n greater than 1
sPositive integer, n
sCan be divided exactly n by k
s=kn
s', n
s' be positive integer; Whenever after finishing the scanning process in a stage, carry out the scanning in next stage, until the scanning process of finishing k stage.
The present invention utilizes the line time slice recombination method with the scanning frame period T of scan area for the basic driver dot matrix of L * V
sBe divided into k stage, in each stage, the basic driver dot matrix is finished the single pass process, not only improved display screen and flashed frequency, improved the dynamic stability of image, also the movement edge distortion defective to colleague's (row) scanning vertical direction has the good effect of improving.
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Fig. 1 is the control procedure synoptic diagram of the standard time sheet scanning gray level control method of background technology.
Fig. 2 is the control procedure synoptic diagram of the line time slice distribution reorganization scanning gray level control method of background technology.
Fig. 3 is the standard weight timeslice scanning gray level control method control procedure synoptic diagram of background technology.
Fig. 4 is the embodiment 1 control synoptic diagram of non-uniform interval blanking scan time series of time slices of flat panel display modulator approach of the present invention.
Fig. 5 is the embodiment 2 control synoptic diagram of non-uniform interval blanking scan time series of time slices of flat panel display modulator approach of the present invention.
Fig. 6 is the embodiment 3 control synoptic diagram of non-uniform interval blanking scan time series of time slices of flat panel display modulator approach of the present invention.
Embodiment
As shown in Figure 1, the process of controlling for the employing standard time sheet scanning gray level of background technology.See that from figure video data K supposes that M is from 1 to 255 totally 255 timeslice T still between 0 to 255
CLK, because video data 0 is holding time cycle not, so line period T
L=255 * T
CLKAnd frame period T
S=L * T
LFour consecutive point video data K values of this row are respectively 0,1, and 51 and 109, in first timeslice (M=1) of this row, video data is respectively 0,1,51,109, and these numerical value have been represented the gray-scale data of these several picture elements; Be respectively 0,1,1,1 through comparer output at the displayed value of first timeslice; Be 0,0 in the actual displayed time of first each picture element of timeslice as we can see from the figure, T
S/ 255L, T
S/ 255L.In second timeslice (M=2), video data still is respectively 0,1,51,109, is being respectively 0,0,1,1 through comparer output at the displayed value of second timeslice; The actual displayed time of second each picture element of timeslice is 0,0, T
S/ 255L, T
S/ 255L.But in the 52 timeslice (M=52), video data only has the output numerical value of last point to remain 1 after exporting through comparer, and displayed value is respectively 0,0, and 0,1; The actual displayed time of each picture element is 0,0,0, T
S/ 255L.Can see that according to video data, do not show the time at first, second demonstration time is 1 timeslice, and thirdly the demonstration time is 51 timeslices, and the 4th is 109 timeslices, and the actual displayed time of therefore last these four consecutive point is 0, T
S/ 255L, 51T
S/ 255L, 109T
S/ 255L; Corresponding video data is 0,1,51,109; Finished the gray level display of display screen.
As shown in Figure 2, for adopting the control procedure synoptic diagram of line time slice distribution reorganization scanning gray level control method, new as we can see from the figure line-scanning period T
L'=T
s/ (3L), its course of work is:
Video data supposes that number of grayscale levels is n between 0 to 255
s=3n
sSo '=255 are with the corresponding timeslice T of gray level
CLKQuantity M be from 1 to 255 totally 255.Line period T
L=255 * T
CLKFrame period T
s=L * T
LExcept the frame period does not change, new line-scanning period T following the adjustment appears:
L'=T
s/ (Lk)=T
s/ 3L=85 * T
CLK, the frame period then can be expressed as T
s=L * T
L=3 * L * T
L'; Five consecutive point video data K values of this row are respectively 0,1, and 84,169 and 255, these numeric distribution are in new line scanning; At n
s=3n
s' condition under, timeslice scanning is divided into 3 stages, in the frame period of regulation, the new line-scanning period is original 1/3rd.In first timeslice (M=1) of phase one newline, video data is respectively 0,1, and 84,169 and 255, these numerical value have been represented the gray-scale data of these several picture elements; Be respectively 0,1,1,1,1 through comparer output at the displayed value of first timeslice; Be 0 in the actual displayed time of first each picture element of timeslice as we can see from the figure, T
s/ 255L, T
s/ 255L, T
s/ 255L, T
s/ 255L.In second timeslice (M=2) of phase one newline, video data still is respectively 0,1,84,169 and 255, is respectively 0,0,1,1,1 through comparer output at the displayed value of second timeslice; The actual displayed time of second each picture element of timeslice is 0,0, T
s/ 255L, T
s/ 255L, T
s/ 255L.In last timeslice (M=85) of phase one newline, video data still is respectively 0,1,84,169 and 255, and exporting in the end through comparer, the displayed value of a timeslice is respectively 0,0,0,1,1; The actual displayed time of last each picture element of timeslice of phase one newline is 0,0,0, T
s/ 255L, T
s/ 255L.The phase one newline begins to change over to the phase one timeslice scanning of next scan line at the timeslice end of scan of this row at this moment; After the phase one of the whole scan lines timeslice end of scan, the scanning of subordinate phase timeslice restarts in one's own profession; In first timeslice (M=86) of subordinate phase newline, video data is respectively 0,1, and 84,169 and 255, these numerical value have been represented the gray-scale data of these several picture elements; Be respectively 0,0,1,1,1 through comparer output at the displayed value of first timeslice; Be 0,0 in the actual displayed time of first each picture element of timeslice as we can see from the figure, T
s/ 255L, T
s/ 255L, T
s/ 255L.In second timeslice (M=86) of subordinate phase newline, video data is respectively 0,1, and 84,169 and 255, these numerical value have been represented the gray-scale data of these several picture elements; Be respectively 0,0,0,1,1 through comparer output at the displayed value of second timeslice; Be 0,0,0 in the actual displayed time of second each picture element of timeslice as we can see from the figure, T
s/ 255L, T
s/ 255L.But, after comparer output, only there is the output numerical value of last point to remain 1 in last timeslice (M=170) of subordinate phase newline, the actual displayed time of last each picture element of timeslice of subordinate phase newline is 0,0,0 like this, 0, T
s/ 255L.This moment, the subordinate phase newline finished in second the stage timeslice scanning (86-170 timeslice) of this row, began to change over to second the stage timeslice scanning (86-170 timeslice) of next scan line; After second stage timeslice end of scan of whole scan lines, phase III timeslice scanning restarts in one's own profession; In first timeslice (M=171) of phase III newline, video data is respectively 0,1, and 84,169 and 255, be respectively 0,0,0,0,1 through comparer output at the displayed value of first timeslice; The actual displayed time at first each picture element of timeslice of phase III newline is 0,0,0,0 as we can see from the figure, T
s/ 255L.In last timeslice (M=255) of phase III newline, the actual displayed time of each picture element is 0,0,0,0, T
s/ 255L.The phase III newline begins to change over to the phase III timeslice scanning of next scan line at the phase III of this row timeslice end of scan at this moment; After the phase III of the whole scan lines timeslice end of scan, the actual displayed time of these five consecutive point is 0 at last, T
s/ 255L, 84T
s/ 255L, 169T
s/ 255L, 255T
s/ 255L; Corresponding video data is 0,1,84,169 and 255; Finished the gray level display of display screen.
As shown in Figure 3, the process of controlling for standard weight timeslice scanning gray level: video data is between 0 to 255, and weight-value time-slice sequence number M express time sheet from 1 to 8 is totally 8 time serieses, blanking basic controlling time T
q=T
CLK/ 128=T
L/ 128M=T
S/ 128ML; Four consecutive point video datas of this row are respectively 0,1,51,255, and the binary code of these numerical value is 00000000B, 00000001B, 00110011B, 11111111B; Be respectively 0,1,1,1 through the output of weights comparer at the displayed value of the 1st timeslice; Be 0 in the actual displayed time of the 1st each picture element of timeslice as we can see from the figure, T
CLK/ 128, T
CLK/ 128, T
CLK/ 128.In second timeslice (M=2), video data still is respectively 0,1,51,255, is being respectively 0,0,1,1 through the output of weights comparer at the displayed value of the 2nd timeslice; The actual displayed time of the 2nd each picture element of time series is 0,0,2T
CLK/ 128,2T
CLK/ 128.In the 3rd timeslice (M=3), video data only has the output numerical value of last point to remain 1 after exporting through the weights comparer, and displayed value is respectively 0,0, and 0,1; The actual displayed time of each picture element is 0,0,0,4T
CLK/ 128.And in the 5th timeslice (M=5), after video data was exported through the weights comparer, displayed value became 0,0,1,1 again; The actual displayed time of each picture element is 0,0,16T
CLK/ 128,16T
CLK/ 128.Can see that according to video data, do not show the time at first, second demonstration time is 1 D0 weight-value time-slice, and thirdly the demonstration time is D0, D1, D4, D5 weight-value time-slice, and the 4th is whole 8 weight-value time-slices, the actual displayed time of therefore last these four consecutive point is 0, T
CLK/ 128,51T
CLK/ 128,255T
CLK/ 128; Corresponding video data is 0,1,51,255.
Embodiment 1:
Present embodiment is to insert the non-homogeneous blanking time to scan the gray level control method at interval between each standard time sheet, and the specific implementation process as shown in Figure 4.
See that from figure video data K is still between 0 to 255, M is from 1 to 255 totally 255 timeslice T '
CLK, because T
S/ L=n * T '
CLK+ T
Blanking between timesliceLine period T
L=255 * T '
CLK+ T
Disappear between timeslice LatentT '
CLK=T
Blanking between timesliceInsert 254 non-homogeneous timeslice blankings if press the linear growth method, then the time of first non-homogeneous timeslice blanking is 1/32385T '
CLKThe time of last non-homogeneous timeslice blanking is 254/32385T '
CLKAnd frame period T
S=L * T
LFour consecutive point video data K values of this row are respectively 0,1, and 51 and 109, in first timeslice (M=1) of this row, video data is respectively 0,1,51,109, and these numerical value have been represented the gray-scale data of these several picture elements; Be respectively 0,1,1,1 through comparer output at the displayed value of first timeslice; Be 0 in the actual displayed time of first each picture element of timeslice as we can see from the figure, [(T
S/ 255L)-(T
Blanking between timeslice/ 255)], [(T
S/ 255L)-(T
Time Cut latent between sheet/ 255)], [(T
S/ 255L)-(T
Blanking between timeslice/ 255)].In second timeslice (M=2), video data still is respectively 0,1,51,109, is being respectively 0,0,1,1 through comparer output at the displayed value of second timeslice; The actual displayed time of second each picture element of timeslice is 0,0, [(T
S/ 255L)-(T
Timeslice Between blanking/ 255)], [(T
S/ 255L)-(T
Blanking between timeslice/ 255)].But in the 52 timeslice (M=52), video data only has the output numerical value of last point to remain 1 after exporting through comparer, and displayed value is respectively 0,0, and 0,1; The actual displayed time of each picture element is 0,0,0, [(T
S/ 255L)-(T
Between timeslice Blanking/ 255)].Can see that according to video data, do not show the time at first, second demonstration time is 1 [(T
S/ 255L)-(T
Blanking between timeslice/ 255)] the time, thirdly the demonstration time is 51 [(T
S/ 255L)-(T
Timeslice Between blanking/ 255)] the time, the 4th is 255 [(T
S/ 255L)-(T
Blanking between timeslice/ 255)] the time, the actual displayed time of therefore last these four consecutive point is 0, [(T
S/ 255L)-(T
Blanking between timeslice/ 255)], 51[(T
S/ 255L)-(T
Time Blanking between sheet/ 255)], 109[(T
S/ 255L)-(T
Blanking between timeslice/ 255)]; Corresponding video data is 0,1,51,109; Finished the gray level display of display screen, to showing between the timeslice of the gray level of maximum that refreshing frequency has improved 254 times.
Embodiment 2:
Present embodiment is line time slice distribution reorganization time sheet non-uniform interval blanking scanning and modulating method k=3, n
s=3n
s' time finish the line time slice reorganization that distributes, new line-scanning period T
L'=T
s/ (3L):
As shown in Figure 5, video data is between 0 to 255, because number of grayscale levels is n
s=3n
sSo '=255 are with the corresponding timeslice T ' of gray level
CLKQuantity M be from 1 to 255 totally 255.Line period T
L=255 * T
CLK=255 * T '
CLK+ T
Blanking between timeslice, the timeslice blanking control time is T ' in the present embodiment
CLK=T
Blanking between timeslicePress the linear growth method and insert 254 non-homogeneous timeslice blankings, then the time of first non-homogeneous timeslice blanking is 1/32385T '
CLKThe time of last non-homogeneous timeslice blanking is 254/32385T '
CLKFrame period T
s=L * T
LExcept the frame period does not change, new line-scanning period T following the adjustment appears:
L'=T
s/ (Lk)=T
s/ 3L=85 * T
CLK, the frame period then can be expressed as T
s=L * T
L=3 * L * T
L'; Five consecutive point video data K values of this row are respectively 0,1, and 84,169 and 255, these numeric distribution are in new line scanning; At n
s=3n
s' condition under, timeslice scanning is divided into 3 stages, in the frame period of regulation, the new line-scanning period is original 1/3rd.In first timeslice (M=1) of phase one newline, video data is respectively 0,1, and 84,169 and 255, these numerical value have been represented the gray-scale data of these several picture elements; Be respectively 0,1,1,1,1 through comparer output at the displayed value of first timeslice; Be 0 in the actual displayed time of first each picture element of timeslice as we can see from the figure, [(T
S/ 255L)-(T
Blanking between timeslice/ 255)], [(T
S/ 255L)-(T
Blanking between timeslice/ 255)], [(T
S/ 255L)-(T
Blanking between timeslice/ 255)], [(T
S/ 255L)-(T
Blanking between timeslice/ 255)].In second timeslice (M=2) of phase one newline, video data still is respectively 0,1,84,169 and 255, is respectively 0,0,1,1,1 through comparer output at the displayed value of second timeslice; The actual displayed time of second each picture element of timeslice is 0,0, [(T
S/ 255L)-(T
Blanking between timeslice/ 255)], [(T
S/ 255L)-(T
Blanking between timeslice/ 255)], [(T
S/ 255L)-(T
Blanking between timeslice/ 255)].In last timeslice (M=85) of phase one newline, video data still is respectively 0,1,84,169 and 255, and exporting in the end through comparer, the displayed value of a timeslice is respectively 0,0,0,1,1; The actual displayed time of last each picture element of timeslice of phase one newline is 0,0,0, [(T
S/ 255L)-(T
Blanking between timeslice/ 255)], [(T
S/ 255L)-(T
Blanking between timeslice/ 255)].The phase one newline begins to change over to the phase one timeslice scanning of next scan line at the timeslice end of scan of this row at this moment; After the phase one of the whole scan lines timeslice end of scan, the scanning of subordinate phase timeslice restarts in one's own profession; In first timeslice (M=86) of subordinate phase newline, video data is respectively 0,1, and 84,169 and 255, these numerical value have been represented the gray-scale data of these several picture elements; Be respectively 0,0,0,1,1 through comparer output at the displayed value of first timeslice; Be 0,0,0 in the actual displayed time of first each picture element of timeslice as we can see from the figure, [(T
S/ 255L)-(T
Blanking between timeslice/ 255)], [(T
S/ 255L)-(T
Blanking between timeslice/ 255)].In second timeslice (M=86) of subordinate phase newline, video data is respectively 0,1, and 84,169 and 255, these numerical value have been represented the gray-scale data of these several picture elements; Be respectively 0,0,0,1,1 through comparer output at the displayed value of second timeslice; Be 0,0,0 in the actual displayed time of second each picture element of timeslice as we can see from the figure, [(T
S/ 255L)-(T
Blanking between timeslice/ 255)], [(T
S/ 255L)-(T
Blanking between timeslice/ 255)].But, after comparer output, only there is the output numerical value of last point to remain 1 in last timeslice (M=170) of subordinate phase newline, the actual displayed time of last each picture element of timeslice of subordinate phase newline is 0,0,0 like this, 0, [(T
S/ 255L)-(T
Blanking between timeslice/ 255)].This moment, the subordinate phase newline finished in second the stage timeslice scanning (86-170 timeslice) of this row, began to change over to second the stage timeslice scanning (86-170 timeslice) of next scan line; After second stage timeslice end of scan of whole scan lines, phase III timeslice scanning restarts in one's own profession; In first timeslice (M=171) of phase III newline, video data is respectively 0,1, and 84,169 and 255, be respectively 0,0,0,0,1 through comparer output at the displayed value of first timeslice; The actual displayed time at first each picture element of timeslice of phase III newline is 0,0,0,0 as we can see from the figure, [(T
S/ 255L)-(T
Blanking between timeslice/ 255)].In last timeslice (M=255) of phase III newline, the actual displayed time of each picture element is 0,0,0,0, [(T
S/ 255L)-(T
Blanking between timeslice/ 255)].The phase III newline begins to change over to the phase III timeslice scanning of next scan line at the phase III of this row timeslice end of scan at this moment; After the phase III of the whole scan lines timeslice end of scan, the actual displayed time of these five consecutive point is 0 at last, [(T
S/ 255L)-(T
Blanking between timeslice/ 255)], 84[(T
S/ 255L)-(T
Blanking between timeslice/ 255)], 169[(T
S/ 255L)-(T
Blanking between timeslice/ 255)], 255[(T
S/ 255L)-(T
Blanking between timeslice/ 255)]; Corresponding video data is 0,1,84,169 and 255; Finished the gray level display of display screen.
New line-scanning period T
L'=T
s/ (L3), line-scanning frequency f
L'=1/T
L'=3Lf
s, improved 3 times, make 3/2 greater than predefined numerical value 1, tentatively overcome and significantly flashed striped between the driving dot matrix and the movement edge distortion defective of (row) scanning vertical direction of going together, improved the display effect of display screen.Simultaneously to showing between the timeslice of the gray level of maximum that refreshing frequency has improved 254 times.
Embodiment 3:
Present embodiment is a standard weight timeslice non-uniform interval blanking gray-scale modulation method.As shown in Figure 6, the process of control is: video data is between 0 to 255, because T
S/ L=n * T '
CLK+ T
Blanking between timesliceWeight-value time-slice sequence number M express time sheet from 1 to 8 is totally 8 time series T '
CLK, line period T
L=8 * T '
CLK+ T
Blanking between timesliceT '
CLK=T
Blanking between timesliceBlanking basic controlling time T
q=T
CLK/ 128=(T
L-T
Blanking between timeslice)/128M=(T
S-T
Blanking between timeslice* L)/128ML; Insert 7 non-homogeneous timeslice blankings if press the weights growing method, then the time of first non-homogeneous timeslice blanking is 1/112T '
CLKThe time of last non-homogeneous timeslice blanking is 449/896T '
CLKFour consecutive point video datas of this row are respectively 0,1,51,255, and the binary code of these numerical value is 00000000B, 00000001B, 00110011B, 11111111B; Be respectively 0,1,1,1 through the output of weights comparer at the displayed value of the 1st timeslice; Be 0 in the actual displayed time of the 1st each picture element of timeslice as we can see from the figure, T '
CLK/ 128, T '
CLK/ 128, T '
CLK/ 128.In second timeslice (M=2), video data still is respectively 0,1,51,255, is being respectively 0,0,1,1 through the output of weights comparer at the displayed value of the 2nd timeslice; The actual displayed time of the 2nd each picture element of time series is 0,0,2T '
CLK/ 128,2T '
CLK/ 128.In the 3rd timeslice (M=3), video data only has the output numerical value of last point to remain 1 after exporting through the weights comparer, and displayed value is respectively 0,0, and 0,1; The actual displayed time of each picture element is 0,0,0,4T '
CLK/ 128.And in the 5th timeslice (M=5), after video data was exported through the weights comparer, displayed value became 0,0,1,1 again; The actual displayed time of each picture element is 0,0,16T '
CLK/ 128,16T '
CLK/ 128.Can see, according to video data, first does not show the time, second demonstration time is 1 D0 weight-value time-slice, thirdly the demonstration time is D0, D1, D4, D5 weight-value time-slice, the 4th is whole 8 weight-value time-slices, and the actual displayed time of therefore last these four consecutive point is 0, T '
CLK/ 128,51T '
CLK/ 128,255T '
CLK/ 128; Corresponding video data is 0,1,51,255.
The present invention can not be limited to above-mentioned embodiment, and is every at line-scanning period T
S/ L scans n timeslice T ' in the time
CLKThe time, at each timeslice T '
CLKBetween insert n-1 non-homogeneous blanking time at interval, with the refreshing frequency of flexible control display, improve the dynamic stability of image, all the invention is intended within the protection domain.
Claims (4)
1, a kind of non-uniform interval blanking scan time series of time slices of flat panel display modulator approach is characterized in that at line-scanning period T
S/ L scans n timeslice T ' in the time
CLKThe time, at each timeslice T '
CLKBetween insert n-1 non-homogeneous blanking time at interval, expression formula is
T
S/ L==n * T '
CLK+ T
Blanking between timeslice
T wherein
Blanking between timesliceBe n-1 T.T. at interval non-homogeneous blanking time.
2, non-uniform interval blanking scan time series of time slices of flat panel display modulator approach according to claim 1 is characterized in that the time T of m non-homogeneous timeslice blanking
mFor:
T
m=(2m/n (n-1)) T
Blanking between timeslice
Perhaps be:
T
m=(1/2
N-m+ 1/2
N-1(n-1)) T
Blanking between timeslice
3, non-uniform interval blanking scan time series of time slices of flat panel display modulator approach according to claim 2 is characterized in that n-1 non-homogeneous blanking time T.T. T at interval
Blanking between timesliceBe no more than T '
CLK
4, non-uniform interval blanking scan time series of time slices of flat panel display modulator approach according to claim 1 is characterized in that the present invention can also select the numerical value of k, is the scanning frame period T of the basic driver dot matrix of L * V with scan area
sBe divided into k stage, in each stage, the basic driver dot matrix finished the single pass process; New line-scanning period T
L'=T
s/ (Lk), finish n in the new line-scanning period
s' modulation; L is the number of scanning lines of basic driver dot matrix, and V is the scanning columns of basic driver dot matrix, and the gray-scale displayed level is n
s, k is less than n greater than 1
sPositive integer, n
sCan be divided exactly n by k
s=kn
s', n
s' be positive integer; Whenever after finishing the scanning process in a stage, carry out the scanning in next stage, until the scanning process of finishing k stage.
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| CN101673513A (en) * | 2009-10-30 | 2010-03-17 | 深圳市流明电子有限公司 | Control method |
| CN101937638A (en) * | 2010-08-20 | 2011-01-05 | 广州杰赛科技股份有限公司 | Greyscale scanning output method and device |
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| JPS60257497A (en) * | 1984-06-01 | 1985-12-19 | シャープ株式会社 | Driving of liquid crystal display |
| US5818419A (en) * | 1995-10-31 | 1998-10-06 | Fujitsu Limited | Display device and method for driving the same |
| JP3764371B2 (en) * | 2001-10-26 | 2006-04-05 | ノリタケ伊勢電子株式会社 | Pulse width modulation gradation display method and display circuit |
| CN100346374C (en) * | 2003-11-19 | 2007-10-31 | 中国科学院长春光学精密机械与物理研究所 | Method for modulating mixed weight distribution gray level of panel display screen |
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| CN101673513A (en) * | 2009-10-30 | 2010-03-17 | 深圳市流明电子有限公司 | Control method |
| CN101937638A (en) * | 2010-08-20 | 2011-01-05 | 广州杰赛科技股份有限公司 | Greyscale scanning output method and device |
| CN101937638B (en) * | 2010-08-20 | 2012-05-30 | 广州杰赛科技股份有限公司 | Greyscale scanning output method and device |
| CN103886835A (en) * | 2014-02-10 | 2014-06-25 | 深圳市明微电子股份有限公司 | Method for solving dynamic screen row dark phenomenon, system thereof, driving chip, and control card |
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Effective date of registration: 20200923 Address after: No.488 Chaoyue street, high tech Development Zone, Changchun City, Jilin Province Patentee after: CHANGCHUN CEDAR ELECTRONICS TECHNOLOGY Co.,Ltd. Address before: 130033 southeast Lake Road, Jilin, Changchun, No. 3888 Patentee before: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences |