CN101308636B - Liquid crystal display capable of improving display quality of dynamic images and driving method thereof - Google Patents
Liquid crystal display capable of improving display quality of dynamic images and driving method thereof Download PDFInfo
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- CN101308636B CN101308636B CN 200710106374 CN200710106374A CN101308636B CN 101308636 B CN101308636 B CN 101308636B CN 200710106374 CN200710106374 CN 200710106374 CN 200710106374 A CN200710106374 A CN 200710106374A CN 101308636 B CN101308636 B CN 101308636B
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Abstract
The invention provides a liquid crystal display which is capable of improving dynamic image display quality and the drive method thereof. The liquid crystal display comprises a panel with a plurality of pixels, a time sequence controller, a data drive circuit and a scanning drive circuit. The pixels generate predetermined brightness within the time of one image and are electrically connected respectively with scanning lines and data wires. The time sequence controller renews time according to at least one scanning line signal and calculates the number of the leaping points which are overleapt during the grey scale transformation of the pixels from the previous image to the current image according to at least one high-low gray scale table to find out the renewal time and the high-low gray scale table at which the number of the leaping points during the grey scale transformation process is the smallest. The data drive circuit produces pixel driving data to the pixel according to the renewal time discovered by the time sequence controller. The scanning drive circuit renews the time of the signal of the scanning line which corresponds to the lowest number of the leaping points and sends the signal of the scanning line to the pixels. Therefore, the liquid crystal display improves dynamic image display quality.
Description
Technical field
The invention relates to a kind of liquid crystal display driving method, espespecially a kind of Liquid Crystal Display And Method For Driving that can improve the display quality of dynamic menu.
Background technology
The display mode of existing cathode-ray tube display is pulsed (Impulse Type), and each pixel is in each image time, and the shinny time only has in a flash.Because cathode-ray tube display is that pulsed and reaction velocity are very fast, the picture that therefore shows now can not be subject to previous picture brightness impact, so dynamic menu does not have residual image.
The display mode of available liquid crystal display then for keeping formula (Hold Type), keep ideally certain by the brightness of its pixel in an image time.Recently be used in the rapidly development of LCD panel maximization on PC and the TV, the improvement of the dynamic image quality of LCD panel is quite popular in recent years topic.And the dynamic menu of LCD screen is fuzzy, typically refer in the process of changing picture, ill-defined phenomenon has occured, the reason that the dynamic menu blooming occurs has two, one is the reaction time of liquid crystal, another is that active-matrix liquid crystal (TFT) drives, just as the image control of keeping formula (Hold Type) etc.
So-called " keeping formula (Hold Type) mode " shows, be exactly to show a picture (Frame) image within the regular hour, and in television image, this keeping (Hold) time is equivalent to a vertical cycle (16.7 milliseconds).
Generally speaking, the liquid crystal reaction time shows it is considerable for animation, because with LCD TV, the conversion time of a picture approximately is 16.7ms, so the reaction time of LCD TV can be shorter than 16.7ms, extremely important for the performance of animation image quality.
But, even the reaction time of liquid crystal is 0ms, fuzzy still can not disappear.This is because LCD screen is to utilize " keeping formula (Hold Type) mode " to come show image.
Can know that according to some laboratory reports the animation that utilizes " keeping formula (Hold Type) mode " to show at screen can rock from side to side at retina, such shakes along with time integral, just thinks that dynamic menu has blured.
See also Fig. 1, this is corresponding at present picture GTG scale (current gray scale) animation reaction time (the Motion Picture Response Time) schematic perspective view of previous picture GTG scale (previous gray scale) in the prior art.As shown in Figure 1, the pixel of a-quadrant is transformed to the pixel of present picture high gray for the pixel from the low GTG of previous picture, the pixel in B zone is transformed to the pixel of the low GTG of present picture for the pixel from previous picture high gray, pixel or its reaction time of pixel in B zone of no matter being the a-quadrant are all longer, therefore cause easily the not good and blooming of described regional dynamics picture quality.
In the prior art, improving because keeping the fuzzy of (Hold) dynamic menu that the time causes, is to cooperate frame frequency and phase place to give me a little the backlight source of going out, and the explicit representation at intermittence that utilizes flicker backlight and black signal to insert improves the fuzzy phenomenon of dynamic menu.Therefore can utilize in the prior art the explicit representation at intermittence of black insertion technology to improve the fuzzy phenomenon of dynamic menu.Generally speaking, all be to utilize a high gray and a low GTG intermittently to show to come GTG of compound display a GTG.So a GTG table (High-Low Look-up Table, High-Low LUT) can be set in system, utilize described GTG table to find corresponding high gray value and low GTG value according to detected GTG value.
See also Fig. 2, this is corresponding at present picture GTG (the current gray level) synoptic diagram of previous picture GTG (previous gray level) of corresponding diagram 1.As shown in Figure 2, with the GTG degree of 8 bits record according to pixel, then can be divided into 0 GTG to 255 GTG, define a grey point (Gray Point), be by full lime rank values (255 GTG) and full grey black rank values (0 GTG) in the dynamic stability situation intermittently demonstration come the GTG value that compound display should ash point (Gray Point), this GTG value is to be decided by liquid crystal characteristic.That is the voltage that utilizes two pulse signals (pulse signal) will correspond to respectively 0 GTG value and 255 GTG values sends in the panel, and obtains the GTG value of this ash point (Gray Point).As shown in Figure 2, previous picture has the GTG value of a grey point (Gray Point), and picture has the GTG value of another grey point (Gray Point) at present, and the grey point (Gray Point) of the grey point (Gray Point) of previous picture and present picture is divided into four zones with the corresponding at present picture GTG (current gray level) of previous picture GTG (previous gray level) signal picture: first area, second area, the 3rd zone and the 4th zone.If be transformed to the pixel (second area) of present picture high gray from the pixel of the low GTG of previous picture, be transformed to the pixel (the 3rd zone) of the low GTG of present picture from the pixel of previous picture high gray, no matter be that the pixel of second area or its gray scale variation of pixel in the 3rd zone can be crossed over the straight line that passes through grey point (Gray Point), the dynamic menu bad of the pixel in described zone then.
See also Fig. 3, this is to utilize high gray and low GTG intermittently to show to come pulse signal (pulse signal) the sequential synoptic diagram of a GTG of compound display in the prior art; Wherein m is the number of sweep trace in the display.Every sweep trace is opened twice to I haven't seen you for ages in an image time, and the time interval of twice unlatching is defined as a update time (refresh time), update time (refresh time)=(m-n)/m * image time (frame time).Square wave among the figure is the voltage signal of sweep trace, the low luma data of input within the opening time of a update time, and within the opening time of next update time, input the high gray data; Also can within the opening time of a update time, input the high gray data, and luma data is hanged down in input within the opening time of next update time.The order of sweep trace unlatching can be for after opening when article one sweep trace in addition, then (n+1) bar sweep trace is opened, sequentially open subsequently second sweep trace, (n+2) bar sweep trace ... until after all sweep traces all open, repeat again with the upper tracer opening sequence, therefore can derive the update time=(m-n/m) * one image time, can know simultaneously by adjusting the n value namely dynamically to change update time.
See also Fig. 4 A～Fig. 4 C, this is in the prior art, at identical GTG table (High-Low LUT), utilize the intermittently length of displaying time of control high gray and low GTG, change the synoptic diagram of the position (GTG value) of grey point (Gray Point).That is give the difference of pulse signal (pulse signal) width of high gray table (High LUT) and low GTG table (Low LUT) by control, change the position (GTG value) of grey point (Gray Point).
Shown in Fig. 4 A, this is control high gray displaying time relatively shorter (I zone) and the low GTG displaying time of control long (II zone).In other words, that is control high gray table (High LUT) driving time is shorter, and low GTG table (Low LUT) driving time of control is longer.Therefore can adjust the position (GTG value) of grey point (Gray Point) moves toward low GTG direction.Shown in Fig. 4 B, this is that control high gray displaying time (I zone) is identical with the low GTG displaying time of control.In other words, that is control high gray table (High LUT) driving time and control to hang down GTG table (Low LUT) driving time identical.Shown in Fig. 4 C, be control high gray displaying time long (I zone) and the low GTG displaying time of control relatively shorter (II zone).In other words, that is control high gray table (High LUT) driving time is longer, and low GTG table (Low LUT) driving time of control is shorter.Therefore can adjust the position (GTG value) of grey point (Gray Point) moves toward the higher gray scale direction.
Summary of the invention
The present invention is the above-mentioned shortcoming that exists in order to overcome prior art, for the gray scale variation of avoiding pixel was crossed over grey point (Gray Point), cause the result of the dynamic menu bad of described pixel, and a kind of Liquid Crystal Display And Method For Driving that can improve the display quality of dynamic menu that provides.
For reaching above-mentioned purpose, the invention provides a kind of display, comprise:
One panel, described panel comprise most pixels, and described pixel is electrically connected with sweep trace and data line respectively, and described pixel produces a predetermined luminance in an image time;
Time schedule controller, according at least a scanning-line signal update time and at least a GTG table, carrying out previous picture calculates with the statistical magnitude that the crossover point of ash point was crossed in the at present pixel gray level variation of picture, find the minimum crossover point of statistical magnitude, corresponding scanning-line signal update time and GTG table;
One data drive circuit is the GTG table corresponding according to the minimum crossover point of statistical magnitude, determines an overdrive pixel data, exports the driving voltage of described overdrive pixel data via described data line to described pixel; And
Scan driving circuit, the scanning-line signal update time that the crossover point that statistical magnitude is minimum is corresponding, and output scanning line signal is to described pixel, so that described pixel receives described overdrive pixel data and described driving voltage.
The present invention also provides a kind of driving method of display, and it comprises the following step:
Set at least a scanning-line signal update time;
Set at least a GTG table;
According to described scanning-line signal update time and described GTG table producing 2 grey points;
Calculate the statistical magnitude that previous picture and present its gray scale variation of pixel of picture can be crossed over the crossover point of described ash point;
Find the corresponding GTG table of the minimum crossover point of statistical magnitude; And
According to the corresponding GTG table of the minimum crossover point of statistical magnitude, produce one and drive pixel data, export the driving voltage of described driving pixel data to the pixel of described display.
Because the present invention has adopted above technical scheme, the statistical magnitude that its gray scale variation of pixel of utilizing each picture to carry out previous picture and present picture can be crossed over the crossover point of grey point (Gray Point), to determine the statistical magnitude of crossover point, when finding minimum crossover point, i.e. Optimal Control GTG table (High-Low LUT) and corresponding displaying time thereof are found in representative.Thereby improved the display quality of dynamic menu.
Description of drawings
For making more clear feature of the present invention, performance and effect, the present invention is described in detail as follows by following diagram.
Fig. 1 is corresponding at present picture GTG scale (current gray scale) the reaction time schematic perspective view of existing previous picture GTG scale (previous gray scale).
Fig. 2 is corresponding at present picture GTG (the current gray level) synoptic diagram of the previous picture GTG (previous gray level) of corresponding diagram 1.
Fig. 3 utilizes high gray and low GTG intermittently to show to come pulse signal (pulse signal) the sequential synoptic diagram of a GTG of compound display for existing.
Fig. 4 A～Fig. 4 C is in the prior art, utilizes the intermittently length of displaying time of control high gray and low GTG, changes position (GTG value) synoptic diagram of grey point (Gray Point).
Fig. 5 A～Fig. 5 D is preferred embodiment of the present invention, in the immovable situation of scanning-line signal update time (refresh time), utilize different GTG table (High-Low Look-up Table, High-Low LUT) to change position (GTG value) synoptic diagram of grey point (Gray Point).
Fig. 6 A～Fig. 6 D is that the corresponding original input GTG of Fig. 5 A～Fig. 5 D, output GTG and GTG table (High-Low LUT) concern synoptic diagram.
Fig. 7 A～Fig. 7 C is the ash point synoptic diagram that the height GTG table driving time of preferred embodiment of the present invention cooperates the GTG table to produce.
Fig. 8 is the crossover point statistic synoptic diagram that its gray scale variation of pixel in a picture of preferred embodiment of the present invention can be crossed over grey point (Gray Point).
The main element symbol description is as follows among the figure:
A zone, zone B
I zone, zone II
GP ash point (Gray Point)
X ash point (Gray Point)
Y ash point (Gray Point)
Y2 ash point (Gray Point)
Z ash point (Gray Point)
Z2 ash point (Gray Point)
GP
X1, GP
X2, GP
X3Ash point (Gray Point)
GP
Y1, GP
Y2, GP
Y3, GP
Y2Ash point (Gray Point)
GP
Z1, GP
Z2, GP
Z3, GP
Z2Ash point (Gray Point)
GP
MAsh point (Gray Point)
Embodiment
Please consult first Fig. 5 A～Fig. 5 D, this is preferred embodiment of the present invention, in the immovable situation of scanning-line signal update time (refresh time), utilize different GTG tables (High-Low Look-up Table, High-Low LUT) controls the intermittently length of displaying time of high gray and low GTG, to change the synoptic diagram of grey point (Gray Point) position (GTG value).
Shown in Fig. 5 A, this is a GTG table (High-Low LUT), and wherein X ash point (X gray) represents the position (GTG value) of grey point (Gray Point).Shown in Fig. 5 B, high gray table (High LUT) is by 0 gray scale variation to 30 GTG, and again by 30 gray scale variation to 255 GTGs, low GTG table (Low LUT) is by 0 gray scale variation to 30 GTG, again by 30 gray scale variation to 255 GTGs.Be that with Fig. 5 A difference input signal does not change if input signal is lower than 30 GTGs, namely do not have high and low gray scale variation.In addition, Fig. 5 B has two grey points (Gray Point) Y ash point (Y gray) and Y2 ash point (Y2gray).Shown in Fig. 5 C, high gray table (High LUT) is by 0 gray scale variation to 80 GTG, and again by 80 gray scale variation to 255 GTGs, low GTG table (Low LUT) is by 0 gray scale variation to 80 GTG, again by 80 gray scale variation to 255 GTGs.Be that with Fig. 5 A difference input signal does not change if input signal is lower than 80 GTGs, namely do not have high and low gray scale variation.In addition, Fig. 5 C has two grey points (Gray Point) Z ash point (Z gray) and Z2 ash point (Z2gray).And for example shown in Fig. 5 D, high gray table (High LUT) is changed to first 150 GTGs by 80 GTGs, be changed to again 220 GTGs, at last by 220 gray scale variation to 255 GTGs, low GTG table (Low LUT) is changed to first 40 GTGs by 0 GTG, be changed to again 220 GTGs, at last by 220 gray scale variation to 255 GTGs.If be in input signal different from former figures is higher than 220 GTGs, input signal does not change, and does not namely have high and low gray scale variation.In addition, Fig. 5 D has a grey point (Gray Point) M ash point (M gray).Above high gray table (High LUT) is identical with part luma data in the low GTG table (Low LUT), and its purpose is to change ash point position, to reduce the situation of film flicker in the static background.
See also Fig. 6 A～Fig. 6 D, this is that the corresponding original input GTG of Fig. 5 A～Fig. 5 D, output GTG and GTG table (High-Low LUT) concern synoptic diagram.In addition, the part GTG may occur when seeing for minimizing picture side and show discontinuous situation, capable of dynamic is adjusted slightly the curve of Fig. 6 A～Fig. 6 D and is not located more gently, change over the smooth curve of 6A01,6B01,6C01 and 6D01, that is dynamically adjust slightly the corresponding GTG table (High-LowLUT) of Fig. 5 A～5D.
Referring again to Fig. 7 A～Fig. 7 C, this is the Liquid Crystal Display And Method For Driving synoptic diagram of the display quality that improves dynamic menu of preferred embodiment of the present invention.
Shown in Fig. 4 A, Fig. 5 A, Fig. 7 A, shorter by control high gray table (High LUT) driving time shown in Fig. 4 A, low GTG table (Low LUT) driving time of control is longer, then can produce a grey point (Gray Point) GP in conjunction with the GTG table shown in Fig. 5 A (High-Low LUT)
X1In like manner, shown in Fig. 4 B, Fig. 5 A, Fig. 7 A, identical by low GTG table (Low LUT) driving time of control high gray table (High LUT) driving time shown in the 4B and control, then can produce a grey point (Gray Point) GP in conjunction with the GTG table shown in Fig. 5 A (High-Low LUT)
X2And shown in Fig. 4 C, Fig. 5 A, Fig. 7 A, longer by control high gray table (High LUT) driving time shown in Fig. 4 C, low GTG table (Low LUT) driving time of control is shorter, then can produce a grey point (Gray Point) GP in conjunction with the GTG table shown in Fig. 5 A (High-Low LUT)
X3
Again, shown in Fig. 4 A, Fig. 5 B, Fig. 7 B, short long with low GTG table (Low LUT) driving time of control by control high gray table (High LUT) driving time shown in Fig. 4 A, then can produce a grey point (Gray Point) GP in conjunction with the GTG table shown in Fig. 5 B (High-Low LUT)
Y1In like manner, shown in Fig. 4 B, 5B, 7B, identical by low GTG table (Low LUT) driving time of control high gray table (High LUT) driving time shown in Fig. 4 B and control, then can produce a grey point (Gray Point) GP in conjunction with the GTG table shown in Fig. 5 B (High-Low LUT)
Y2And shown in Fig. 4 C, 5B, 7B, long short with low GTG table (Low LUT) driving time of control by control high gray table (High LUT) driving time shown in Fig. 4 C, then can produce a grey point (Gray Point) GP in conjunction with the GTG table shown in Fig. 5 C (High-Low LUT)
Y3Y wherein
2The grey point that produces for Fig. 5 B.
Shown in Fig. 4 A, Fig. 5 C, Fig. 7 C, shorter by control high gray table (High LUT) driving time shown in Fig. 4 A, low GTG table (Low LUT) driving time of control is longer, then can produce a grey point (Gray Point) GP in conjunction with the GTG table shown in Fig. 5 C (High-Low LUT)
Z1In like manner, shown in Fig. 4 B, 5C, 7C, identical by low GTG table (Low LUT) driving time of control high gray table (High LUT) driving time shown in Fig. 4 B and control, then can produce a grey point (Gray Point) GP in conjunction with the GTG table shown in Fig. 5 C (High-Low LUT)
Z2And shown in Fig. 4 C, Fig. 5 C, Fig. 7 C, longer by control high gray table (High LUT) driving time shown in Fig. 4 C, low GTG table (Low LUT) driving time of control is shorter, then can produce a grey point (Gray Point) GP in conjunction with the GTG table shown in Fig. 5 C (High-Low LUT)
Z3Z wherein
2The grey point that produces for Fig. 5 C.
Shown in Fig. 4 A, Fig. 4 B, Fig. 4 C, Fig. 5 D, because the high gray table (High LUT) of the GTG table (High-Low LUT) shown in Fig. 5 D and low GTG table (Low LUT) GTG separation are all at 220 GTGs, so even scanning-line signal changes update time, the ash point can't change, and therefore only can produce a grey point (Gray Point) GP
M ash point (M Gray)
Please refer to Fig. 8, this is the crossover point statistic synoptic diagram that its gray scale variation of pixel in a picture of preferred embodiment of the present invention can be crossed over grey point (Gray Point).Its calculation rule is as follows:
If G
N-1(i, j) is less than GP
xAnd G
n(i, j) is greater than GP
xOr G
N-1(i, j) is greater than GP
xAnd G
n(i, j) is less than GP
x, GP
xCan be GP
X1, GP
X2, GP
X3, GP
Y1, GP
Y2, GP
Y3, GP
Y2 ash point (Y2gray), GP
Z1, GP
Z2, GP
Z3, GP
Z2 ash point (Z2gray), crossover point statistic CN then
xProgressively add up one.G wherein
n(i, j) represents certain picture (frame) i and is listed as the GTG value of the capable pixel of j.That is be listed as the GTG value G of the capable pixel of j as previous picture (frame) i
N-1(i, j) less than the GTG value of grey point (Gray Point) and at present the picture i GTG value that is listed as the capable pixel of j greater than the GTG value of grey point (Gray Point) or be listed as the GTG value G of the capable pixel of j as previous picture (frame) i
N-1(i, j) is listed as the GTG value of the capable pixel of j less than the GTG value of grey point (Gray Point) greater than GTG value and the present picture i of grey point (Gray Point), then crossover point CN
xProgressively add up one.Therefore as shown in Figure 8 previous picture and present its gray scale variation of pixel of picture can be obtained and the crossover point statistic synoptic diagram of grey point (Gray Point) can be crossed over.According to this statistic synoptic diagram, the previous picture that can find BI is minimum with the crossover point statistical magnitude that present its gray scale variation of pixel of picture can be crossed over grey point (Gray Point).And BI is the grey point that utilizes the combination of Fig. 4 A and Fig. 5 B to determine, that is adopt driving time by the height GTG table of the control shown in Fig. 4 A (High-Low LUT), and in conjunction with the GTG table shown in Fig. 5 B (High-Low LUT) the grey point that produces (Gray Point) GP
Y1, meeting is so that the display effect of dynamic menu is best.Its reason just be to utilize control GTG table (High-Low LUT) displaying time shown in Fig. 4 A in conjunction with the GTG table shown in Fig. 5 B (High-Low LUT) the grey point that produces (Gray Point) GP
Y1, and previous picture can to cross over the crossover point statistical magnitude of passing through grey point (Gray Point) with present its gray scale variation of pixel of picture be minimum.In addition, can preset a contiguous pixels statistical value 81 to judge that display frame is as tableaux or dynamic menu, as all crossover point CN
xStatistic during all less than this contiguous pixels statistical value, representing display frame is static a demonstration, can reply this moment to be the type of drive of keeping formula (Hold Type) scintillation when further reducing static the demonstration.
Therefore for reaching the optimal dynamic picture display effect, each picture all can carry out the statistical magnitude that previous picture and present its gray scale variation of pixel of picture can be crossed over grey point (Gray Point) or crossover point, when the statistical magnitude that finds minimum crossover point, i.e. Optimal Control GTG table (High-Low LUT) displaying time and GTG table (High-Low LUT) are found in representative.And, the switching of Optimal Control GTG table (High-Low LUT) displaying time and GTG table (High-Low LUT), causing driving pixel data changes, issuable picture disturbances when avoiding switching, corresponding overdrive pixel data can directly be set up enquiry form and obtains with lookup table mode in the handoff procedure, or utilize the interpolative operation rule to calculate suitable overdrive pixel data, to reduce the foundation of enquiry form, reduce the memory body use amount.
In the above-described embodiments, although be the difference of utilizing the scanning-line signal update time (refresh time) that gives high gray table (High LUT) and low GTG table (Low LUT), in conjunction with utilizing different GTG tables (High-Low Look-up Table, High-Low LUT) controls the intermittently length of displaying time of high gray and low GTG, with the position (GTG value) that changes grey point (Gray Point).Even but in the scanning-line signal update time (refresh time) that gives high gray table (High LUT) and low GTG table (Low LUT) identical situation, utilize different GTG table (High-Low Look-up Table, High-Low LUT) also can reach the position (GTG value) that changes grey point (Gray Point).Therefore the crossover point statistic method that can cross over grey point (Gray Point) of its gray scale variation of pixel in the above-mentioned picture, find the statistical magnitude of minimum crossover point, best GTG table (High-Low LUT) is found in i.e. representative, in order to the display quality of the dynamic menu that improves liquid crystal display.
Above-mentioned method is applied on the liquid crystal display, and this liquid crystal display comprises a panel, time schedule controller, a data drive circuit and scan driving circuit.This panel comprises most pixels, and described pixel is electrically connected with sweep trace and data line respectively, and described pixel produces a predetermined luminance in according to image time.This time schedule controller, update time and at least a GTG table according at least a scanning-line signal, carry out previous picture and calculate with the statistical magnitude that its gray scale variation of pixel of present picture can be crossed over the crossover point that passes through the ash point, find corresponding scanning-line signal update time and the GTG table of crossover point of minimum statistical magnitude.In addition, this data drive circuit is according to the corresponding GTG table of the minimum crossover point of statistical magnitude, produces an overdrive pixel data, exports the driving voltage of this overdrive pixel data via each data line to this pixel.And this scan drive circuit, the scanning-line signal update time that the crossover point that statistical magnitude is minimum is corresponding, and output scanning line signal is to each pixel, so that each pixel receives this overdrive pixel data and this driving voltage.Therefore utilize the aforesaid driving method can be so that this liquid crystal display can provide the display quality of better dynamic menu.
Comprehensively above-mentioned, the invention provides a kind of Liquid Crystal Display And Method For Driving that can improve the display quality of dynamic menu, the statistical magnitude that its gray scale variation of pixel of utilizing each picture to carry out previous picture and present picture can be crossed over the crossover point of grey point (Gray Point), when the crossover point that finds minimum statistical magnitude, i.e. Optimal Control GTG table (High-Low LUT) displaying time and GTG table (High-Low LUT) are found in representative.
Although the present invention discloses as above with preferred embodiment; so it is not to limit the present invention; any the technical staff in the technical field; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is with being as the criterion that claims were defined.
Claims (11)
1. a display is characterized in that, comprises:
One panel, described panel comprise most pixels, and described pixel is electrically connected with sweep trace and data line respectively, and described pixel produces a predetermined luminance in an image time;
Time schedule controller, according at least a scanning-line signal update time and at least a GTG table, calculate the statistical magnitude that previous picture and the present gray scale variation of the pixel of picture were crossed over the crossover points of a plurality of ash points, find the GTG table corresponding with the minimum crossover point of statistical magnitude, wherein, described ash point is the GTG value of the dynamic stability under intermittently showing by a high gray value and a low GTG value; And
One data drive circuit according to the GTG table corresponding with the minimum crossover point of statistical magnitude, produces one and drives pixel data, exports the driving voltage of described driving pixel data via described data line to described pixel.
2. display as claimed in claim 1 is characterized in that, described scanning-line signal update time is the interval time that described continuous pixels is unlocked.
3. display as claimed in claim 1, it is characterized in that, described display also comprises scan driving circuit, described time schedule controller is according to described scanning-line signal update time and described GTG table, calculate the statistical magnitude that previous picture and the present gray scale variation of the pixel of picture were crossed over the crossover points of a plurality of ash points, find the scanning-line signal update time corresponding with the minimum crossover point of statistical magnitude, described scan drive circuit is according to the scanning-line signal update time corresponding with the minimum crossover point of statistical magnitude, and output scanning line signal makes described pixel receive the driving voltage of described driving pixel data to described pixel.
4. display as claimed in claim 1, it is characterized in that, the computing method of the statistical magnitude of described crossover point are: the GTG value that is listed as the capable pixel of j as previous picture i is listed as the GTG value of the capable pixel of j greater than the GTG value of described ash point less than the described grey GTG value of putting and present picture i, or the GTG value that is listed as the capable pixel of j as previous picture i is listed as the GTG value of the capable pixel of j less than the GTG value of described ash point greater than the described grey GTG value of putting and present picture i, and then crossover point progressively adds up one.
5. display as claimed in claim 1 is characterized in that, the driving voltage of described driving pixel data is that the mode with table lookup obtains.
6. display as claimed in claim 1 is characterized in that, the driving voltage of described driving pixel data is that the account form with interpolation obtains.
7. the driving method of a display is characterized in that, comprises the following step:
Set at least a scanning-line signal update time;
Set at least a GTG table;
According to described scanning-line signal update time and described GTG table producing 2 grey points;
Calculate the statistical magnitude that previous picture and present its gray scale variation of pixel of picture can be crossed over the crossover point of described ash point;
Find the GTG table corresponding with the minimum crossover point of statistical magnitude; And
GTG table according to corresponding with the minimum crossover point of statistical magnitude produces an overdrive pixel data, exports the driving voltage of described driving pixel data to the pixel of described display.
8. driving method as claimed in claim 7 is characterized in that, also comprises the following step:
Calculate the statistical magnitude that previous picture and present its gray scale variation of pixel of picture can be crossed over the crossover point of described ash point, find the scanning-line signal update time corresponding with the minimum crossover point of statistical magnitude; And
The scanning-line signal update time that the crossover point that statistical magnitude is minimum is corresponding, output scanning line signal makes described pixel receive the driving voltage of described overdrive pixel data to the pixel of described display.
9. driving method as claimed in claim 7, it is characterized in that, also comprise the following step: the statistical magnitude of calculating described crossover point be for, the GTG value that is listed as the capable pixel of j as previous picture i less than the GTG value of described ash point and at present the picture i GTG value that is listed as the capable pixel of j greater than the GTG value of described ash point or the GTG value that is listed as the capable pixel of j as previous picture i greater than the GTG value of described ash point and at present picture i be listed as the GTG value of the capable pixel of j less than the GTG value of described ash point, then crossover point progressively cumulative one.
10. driving method as claimed in claim 7 is characterized in that, the driving voltage of described driving pixel data is that the mode with table lookup obtains.
11. driving method as claimed in claim 7 is characterized in that, the driving voltage of described driving pixel data is that the account form with interpolation obtains.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710106374 CN101308636B (en) | 2007-05-15 | 2007-05-15 | Liquid crystal display capable of improving display quality of dynamic images and driving method thereof |
Applications Claiming Priority (1)
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| CN101593501B (en) * | 2009-06-26 | 2011-04-06 | 华映光电股份有限公司 | Method for driving liquid crystal display and drive device thereof |
| CN102024432B (en) * | 2009-09-22 | 2012-06-20 | 华映视讯（吴江）有限公司 | Display driving device and method |
| TWI439991B (en) * | 2010-05-11 | 2014-06-01 | Mstar Semiconductor Inc | Overdrive apparatus and associated method for display system |
| CN105208365B (en) * | 2014-06-20 | 2018-05-15 | 青岛海信电器股份有限公司 | One kind shows signal processing method, device and display device |
| CN104795037A (en) * | 2015-04-29 | 2015-07-22 | 深圳市华星光电技术有限公司 | Liquid crystal display panel and driving method thereof |
| CN104821160B (en) * | 2015-05-12 | 2017-09-12 | 深圳市华星光电技术有限公司 | Method for controlling image to show |
| CN112735347A (en) * | 2020-12-30 | 2021-04-30 | Tcl华星光电技术有限公司 | Overvoltage compensation method and device, display panel and storage medium |
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| WO2003098334A1 (en) * | 2002-05-16 | 2003-11-27 | Samsung Electronics Co., Ltd. | A liquid crystal display and a method for driving the same |
| CN1855208A (en) * | 2005-04-29 | 2006-11-01 | 广达电脑股份有限公司 | Brightness adjuster and adjusting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2003098334A1 (en) * | 2002-05-16 | 2003-11-27 | Samsung Electronics Co., Ltd. | A liquid crystal display and a method for driving the same |
| CN1855208A (en) * | 2005-04-29 | 2006-11-01 | 广达电脑股份有限公司 | Brightness adjuster and adjusting method |
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