CN100405448C - Over driving voltage producing method in liquid crystal driving system - Google Patents
Over driving voltage producing method in liquid crystal driving system Download PDFInfo
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- CN100405448C CN100405448C CNB2004100570162A CN200410057016A CN100405448C CN 100405448 C CN100405448 C CN 100405448C CN B2004100570162 A CNB2004100570162 A CN B2004100570162A CN 200410057016 A CN200410057016 A CN 200410057016A CN 100405448 C CN100405448 C CN 100405448C
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Abstract
The present invention relates to a method for generating excess drive voltage which is used for accelerating the rotation of liquid crystal molecules in a liquid crystal display to a needed angle. The liquid crystal display has a plurality of pixel units distributed in an array way, which are divided into a first group of pixel units and a second group of pixel units. The method for generating excess driving voltage comprises the following procedures: (a) temporarily storing a first group of pixel data corresponding to the first group of pixel units in a previous picture datum; (b) comparing the current picture data and the temporarily stored first group of pixel data so as to calculate the excess driving voltage of the current picture data; (c) temporarily storing a second group of pixel data corresponding to the second group of pixel units in a current picture datum; (d) comparing the next picture data and the temporarily stored second group of pixel data so as to calculate the excess driving voltage of the next picture data.
Description
Technical field
The invention relates to the overdrive voltage production method in a kind of liquid crystal drive system, particularly about a kind of overdrive voltage production method that improves internal memory frequency range deficiency and color distortion problem.
Technical background
The main advantage of LCD is to reach easily high display resolution and display slimming, therefore widely be used among the mobile computer, recently along with the lasting exploitation of large size panel, LCD also occupies a tiny space in the type graphoscope gradually on the table.Yet desire imports television product with lcd technology in many manufacturers, and when attempt replaced traditional cathode ray TV with LCD TV, lcd technology manifested its technical bottleneck in the performance of dynamic image.
Please refer to Fig. 1, Fig. 1 is the parent map of LCD 10.Wherein, liquid crystal panel 12 has a plurality of pixel cells (pixel) 121, by the liquid crystal molecule in each pixel cell 121 is bestowed specific voltage, then can change the anglec of rotation of liquid crystal molecule, thus, the light that the backlight 14 of liquid crystal panel 12 belows is provided has different penetrances in the different pixel cell 121 of liquid crystal panel 12, the pixel cell 121 of array then and then interweave and form the picture (frame) that is available for users to watch.If trickleer differentiation, then each pixel cell 121 can be divided into three inferior pixel (sub-pixel) 121R, 121G and 121B, to wield redness, green and the blue composition in each pixel cell 121 respectively.
And as mentioned above, lcd technology manifests its technical bottleneck in the performance of dynamic image, its main cause is just relevant with the revolving property of liquid crystal molecule: because liquid crystal molecule receives after the above-mentioned specific voltage, need one period reaction time, to rotate to another angle (with the corresponding angle of specific voltage) from an original angle.And when video display, the reaction time of liquid crystal molecule is had enough time the renewal rate of picture, causes the delay or the distortion shortcoming of display quality.Therefore, the reaction time that how to shorten liquid crystal molecule is the important topic in the lcd technology.
" the excessive Driving technique of liquid crystal (TFT overdrive) " is for often making at present a kind of method that is used for shortening the liquid crystal reaction time, its principle makes liquid crystal molecule rotate to required angle in the preset time interval by the voltage of painstakingly bestowing liquid crystal molecule one too high (or low excessively).Below will the excessive Driving technique of liquid crystal be described by Fig. 2, the longitudinal axis is represented the liquid crystal molecule anglec of rotation among Fig. 2, and transverse axis is a liquid crystal molecule reaction time axle; As shown in Figure 2, when bestowing liquid crystal cells one control voltage V
CLThe time, liquid crystal molecule needs elapsed time t2 just to be able to by angle θ
0Rotate to and control voltage V
CLCorresponding angle θ
1, and the excessive Driving technique of liquid crystal is bestowed the too high overdrive voltage V of liquid crystal cells one in advance
OD(V
ODBe angle θ
2Control voltage), make liquid crystal molecule when time t1, rotate to angle θ ahead of time
1, and follow-up again voltage is recalled to into angle θ
1Corresponding control voltage V
CL, then can shorten reaction time of liquid crystal thus.
Yet, bestow the too high voltage of liquid crystal molecule one except above-mentioned, also have in the excessive Driving technique of liquid crystal and bestow the situation that liquid crystal molecule one is crossed low-voltage, for example to make liquid crystal molecule by angle θ
1Reverse rotation is to angle θ
0I.e. situation for this reason; And Fig. 2 only represent desire with liquid crystal molecule by angle θ
0Rotate to angle θ
1Situation, during the practical operation LCD, include more angle situation of change.Therefore, in the excessive Driving technique of liquid crystal, the picture and the previous picture that need constantly will just play carry out the comparison of signal, just can calculate suitable overdrive voltage value (value of V
OD); Overdrive voltage (V among Fig. 2 for example
OD) value calculating, must be with angle θ
1(belonging to the liquid crystal molecule in second picture) and angle θ
0(belonging to this liquid crystal molecule in first picture) compares, and just can calculate rational overdrive voltage value.In this case, though the principle of the excessive Driving technique of liquid crystal simple (utilizing too high or too low voltage to shorten the liquid crystal reaction time) has quite complicated signal comparison and calculation procedure when implementing.
Please refer to Fig. 3, Fig. 3 is known liquid crystal drive system synoptic diagram, can further understand known liquid crystal drive system and the excessive Driving technique of liquid crystal wherein by Fig. 3 and the following description.Liquid crystal drive system 20 comprises a processor 21 and an internal memory 26, and liquid crystal drive system 20 receives after the picture data stream 22, can carry out Signal Processing and calculating in inside, and produces drive signal stream 24 liquid crystal molecules that drive in the LCD.
As seen from Figure 3, among the drive signal stream 24, each picture drive signal comprises an overdrive voltage V
ODAn and control voltage V
CLFor example, the second picture drive signal 242 comprises the second overdrive voltage 242V
ODAnd the second control voltage 242V
CL
When second picture data, the 222 input liquid crystal drive systems 20 among the picture data stream 22, processor 21 can be assigned to internal memory 26 with second picture data 222, by internal memory 26 second picture data 222 is kept in, to become second reference 232.
And processor 21 can compare second picture data 222 and first reference 231 that before has been temporary in the internal memory 26, and utilizes the principle of the excessive Driving technique of above-mentioned liquid crystal to calculate the second above-mentioned overdrive voltage 242V
OD
As for the second above-mentioned control voltage 242V
CLThen need be through the comparison program of adjacent pictures data, processor 21 can directly calculate the second control voltage 242V according to second picture data 222
CL
In this case, each picture data (first reference 231, the second reference 232......) that successively is temporary in the internal memory 26 can be regarded as reference stream (reference data stream) 23, and its purposes is to make liquid crystal drive system 20 that the foundation of reference be arranged when producing overdrive voltage.
But, when the excessive Driving technique of liquid crystal was applied in the image of high display resolution, the problem of deration of signal deficiency had appearred in liquid crystal drive system 20.As shown in Figure 3, internal memory 26 is when keeping in picture data, generally speaking the highlyest can only do temporary action with 32 (bit), in other words, the deration of signal between processor 21 and the internal memory 26 is the wideest has only 32 (bit), though under the situation of low display resolution such as VGA (640 * 480) or SVGA (800 * 600), even such deration of signal is enough, if but to show the SXGA (1280 * 1024) or the face in daytime of higher display resolution, then needed 48 (bit) or the wideer deration of signal.
In the face of the problem of this deration of signal deficiency, also can directly develop or adopt the deration of signal wideer (for example 64 s') internal memory certainly, yet its cost is still higher at present, and belongs to the relevant technical field of internal memory.And among about the liquid crystal drive system technical field under the present invention, known way in the face of the problems referred to above is that the signal of Red is respectively given up to fall the position of part than back segment, is described as follows now:
Under the situation of low display resolution, processor 21 is commonly called as single channel (1 channel) at the pixel data of same sequential (clock) reception and processing " one " pixel cell; For example, a scanning linear needs 640 sequential (clock) to finish dealing with among the VGA (640 * 480).Yet, high when showing degree of analysing processor 21 receive and handle the pixel data of " two " pixel cell in same sequential (clock), be commonly called as double-channel; With when the high display resolution of for example SXGA (1280 * 1024), can be equally in the finish dealing with data of a scanning linear of 640 sequential (clock).
The deration of signal that high display resolution is 48 is made up of each 24 institutes of double-channel (2 channels), indivedual single-channel 24 by red, blue, green each 8 form, but the deration of signal between processor 21 and the internal memory 26 has only 32, therefore the one kind of way of known technology be with in the danger signal last 2 give up, and give up 3 last in blueness and the green, and make single channel red, blue, the signal of green (8+8+8)=24 is reduced to the signal of (6+5+5)=16, just can meet 32 the deration of signal thus after merging double-channel.
What deserves to be mentioned is, above-mentioned last 2 of danger signal is given up, and give up blueness and last 3 the known practice of green only is a kind of known embodiment, other also has the way of getting red, blue, green each (5,5,5) position, or (5,6,5), (5,5,6) ... etc., its purpose only is to give up back section of part, to meet the deration of signal.Giving up last 2 with 8 danger signal originally is example, and 8 have 256 looks (256 red GTG looks) originally, and reduction becomes then only remaining 64 looks (64 red GTG looks) after 6, therefore the known practice clearly caused color distortion.
Then by the color distortion shortcoming of Fig. 4 with the above-mentioned known technology of reinforcement explanation, with second picture data 222 is example, when the deration of signal of internal memory 26 is not enough, second picture data 222 can be rejected wherein the data of part position, and forms the second less reference 232 of a data quantity to be temporarily stored among the internal memory 26.As shown in Figure 4, second picture data 222 comprises a plurality of pixel informations (pixel data) 222p, and second reference 232 comprises a plurality of reference pixel data (reference pixel data) 232p.The deration of signal is 48 during high as mentioned above display resolution, represent to have 48 sites (label 25) among the pixel information 222p among Fig. 4, and because the deration of signal of internal memory 46 has only 32 usually, so only remaining 32 sites (label 25) among each reference pixel data 232p as shown in Figure 4.Therefore, by among Fig. 4 as can be seen because the deration of signal deficiency of internal memory 26, make that therefore each pixel information 222p is kept in by halves in second picture data 222, and become incomplete reference pixel data 232p; Its influence of taking out of extends to each picture (frame) and each pixel (pixel) among reference stream 23 (Fig. 3).
But the reason of very not paying attention to this color distortion shortcoming in the known technology is-as shown in Figure 3, the data that color produces distortion is to be temporary in first, second reference 231 in the internal memory 26,232..... etc., be reference stream 23 (reference data stream), reference stream 23 is used for comparing with the picture data stream 22 that to be ready playing, so the problem of color distortion occurs on the reference stream 23; The picture data stream 22 of input liquid crystal drive system 20 and the drive signal stream 24 of output all do not have the problem of deration of signal deficiency.Therefore, in known technology, very do not pay attention to the seriousness of this color distortion shortcoming; Yet fact proved that the color distortion of reference stream is to show that among dynamic image, the color distortion of image can be by the identification of naked eyes institute on the display effect of LCD integral body; Originally wish and to play to promote the picture of display quality with high display resolution, produced the shortcoming of color distortion on the contrary.
Therefore, how to improve image color distortion problem that deration of signal deficiency brought and be at present research and development emphasis about liquid crystal drive system, particularly in the demand of the high display resolution of image day by day under the situation of reinforcement, how can not increase the cost of hardware, and improve the problem of this image color distortion, for the research staff of association area the common target of pursuing.
Summary of the invention
Fundamental purpose of the present invention is to provide the production method of the overdrive voltage in a kind of liquid crystal drive system.
Another object of the present invention is to improve the color distortion shortcoming of liquid crystal drive system under high display resolution.
Another object of the present invention is to not increase under the internal memory hardware cost situation, improve the color distortion shortcoming of liquid crystal drive system.
The present invention provides the overdrive voltage production method in a kind of liquid crystal drive system.Liquid crystal drive system comprises a processor and an internal memory, processor can be temporary to internal memory with a picture data before the input liquid crystal drive system, and processor can be compared current picture data and last picture data, quickens to rotate to required angle and produce overdrive voltage with the liquid crystal molecule that drives in the LCD.Wherein, each stroke face data has all comprised the complex pixel data, and a plurality of pixel cells of array distribution carry out video picture in the LCD to provide.The present invention is grouped into first group of pixel cell and second group of pixel cell with above-mentioned these a plurality of pixel cells.Overdrive voltage production method of the present invention comprises the following steps:
(a) with intactly temporary to this internal memory in the last picture data corresponding to first group of pixel information of this first group of pixel cell.
(b) current picture data and the first group of pixel information that is temporary in the internal memory are compared, to calculate the overdrive voltage of current picture data.
(c) with intactly temporary to this internal memory in the current picture data corresponding to second group of pixel information of second group of pixel cell.
(d) next picture data and this second group of pixel information that is temporary in the internal memory are compared, to calculate the overdrive voltage of next picture data.
The embodiment that various deformation can be arranged about the group technology of first group of pixel cell of the present invention and second group of pixel cell.Spirit wherein of the present invention is-under the known limitation of liquid crystal drive system internal memory, utilization is divided into groups to pixel cell, and utilize the persistence of vision effect of declaring two pictures mutually, so that can be possessed its originally complete position data by temporary pixel cell individually.
By the present invention, not only make the technical bottleneck that liquid crystal drive system is met with when breaking through the high display resolution of LCD, and make the color of show image keep its validity, the more important thing is the present invention has overcome increases the internal memory hardware cost when internal memory deration of signal is not enough certainty, in the future when if the demand of the display resolution of high standard is more arranged, the not enough situation of the internal memory deration of signal that the present invention can be applicable to be correlated with.
Description of drawings
Fig. 1 shows the LCD parent map.
Fig. 2 is the liquid crystal molecule anglec of rotation and reaction time graph of a relation.
Fig. 3 is known liquid crystal drive system synoptic diagram.
Fig. 4 is temporarily stored into the internal memory synoptic diagram for second picture data of Fig. 3.
Fig. 5 is the liquid crystal drive system synoptic diagram of LCD and connection thereof.
Fig. 6 is temporarily stored into the internal memory synoptic diagram for second picture data of Fig. 5.
Fig. 7 is temporarily stored into the internal memory synoptic diagram for the three-picture data of Fig. 5.
Fig. 8 is for keeping in to internal memory second～the 5th picture data synoptic diagram.
Fig. 9 remarked pixel unit packet embodiment A.
Figure 10 remarked pixel unit packet Embodiment B.
Figure 11 remarked pixel unit packet Embodiment C.
Figure 12 remarked pixel unit packet embodiment D.And
Figure 13 remarked pixel unit packet embodiment E.
The figure number explanation
10 LCD, 12 liquid crystal panels
121R pixel of 121 pixel cells
121B pixel of 121G pixel
14 backlights, 20 liquid crystal drive systems
21 processors, 22 picture datas stream
222 second picture data 222P pixel informations
23 references flow 231 first references
232 second reference 232P reference pixel data
24 drive signals flow 242 second picture drive signals
242V
CLThe second control voltage 242V
ODSecond overdrive voltage
25 sites, 26 internal memories
50 liquid crystal drive systems, 51 processors
52 picture datas flow 522 second picture datas
531 first references, 532 second references
532P reference pixel data 533 the 3rd reference
533P reference pixel data 534 the 4th reference
534P reference pixel data 535 Wucans are examined data
535P reference pixel data 54 drive signals stream
541V
ODFirst overdrive voltage, 542 second picture drive signals
542V
CLThe second control voltage 542V
ODSecond overdrive voltage
55 sites, 56 internal memories
60 LCD, 62 liquid crystal panels
The 62A first pixel cell 62B second pixel cell
Embodiment
The present invention is described in more detail below in conjunction with the explanation of accompanying drawing 5～13 and figure number.
Please refer to Fig. 5, Fig. 5 is a liquid crystal drive system synoptic diagram of a LCD and connection thereof.Liquid crystal drive system 50 is according to picture data stream 52, to provide drive signal stream 54 liquid crystal molecules that drive in the LCD 60.Among the drive signal stream 54, each picture drive signal comprises an overdrive voltage V
ODAn and control voltage V
CLWith the second picture drive signal 542 is example, and it comprises the second overdrive voltage 542V
ODAnd the second control voltage 542V
CL
Liquid crystal drive system 50 comprises a processor 51 and an internal memory 56.When second picture data, the 522 input liquid crystal drive systems 50 among the picture data stream 52, processor 51 can be assigned to internal memory 56 with second picture data 522, by internal memory 56 second picture data 522 is kept in, with as second reference 532.And processor 51 can compare second picture data 522 and first reference 531 that before has been temporary in the internal memory 56, and calculates the second overdrive voltage 542V
ODAs for the second control voltage 542V
CLThen need be through the comparison program of adjacent pictures data, processor 51 can directly calculate the second control voltage 542V according to second picture data 522
CLWherein, successively temporary a plurality of references (for example first, second reference 531,532... etc.) to internal memory 56 can be considered reference stream 53.
The problem that known technology met with is: if desire is play the image (pixel information-double-channel of processor 51 same sequential receptions and processing " two " pixel cell of high display resolution, 48), then can when keeping in picture data, can only do temporary action because of internal memory 56 with 32 (bit), in case therefore the deration of signal of reference stream 53 is greater than 32, will cause the reference color that flows 53 representatives produce distortion, and cause overdrive voltage in the drive signal stream 54 (first, second overdrive voltage 541V for example
OD, 542 V
OD... etc.) also produce the shortcoming of color distortion.
Please continue with reference to Fig. 5, overdrive voltage production method provided by the present invention quickens to rotate to required angle with the liquid crystal molecule that drives in the LCD 60 in order to produce overdrive voltage, and improves the shortcoming of color distortion in the known technology.As shown in Figure 5, in the liquid crystal panel 62 of LCD 60, the pixel cell with a plurality of array distribution; The present invention should be grouped into first group of pixel cell 62A and second group of pixel cell 62B by a plurality of pixel cells.And the step of overdrive voltage production method of the present invention is described below:
Step 601: corresponding to first group of pixel data of this first group of pixel cell 62A, wherein each pixel information is intactly stored in the temporary last picture data (the previouS frame data).
Step 603: current picture data (the current frame data) and this temporary first group of pixel information are compared, to calculate the overdrive voltage of current picture data.
Step 605: corresponding to second group of pixel data of this second group of pixel cell 62B, wherein each pixel information is intactly stored in temporary this current picture data.
Step 607: next picture data (the next frame data) and this temporary second group of pixel information are compared, to calculate the overdrive voltage of next picture data.
Then also cooperate following literal with explanation overdrive voltage production method of the present invention by Fig. 6, Fig. 7.With second picture data 522, three-picture data 523 is example, and second picture data 522 comprises a plurality of pixel informations (pixel data) 522p, and three-picture data 523 comprises a plurality of pixel information 523p.And each pixel information 522p, 523p are all 48, represent with 48 sites (number in the figure 55) among the figure.
In the face of the problem of internal memory 56 deration of signal deficiencies, the present invention is grouped into first group of pixel cell 62A and second group of pixel cell 62B (Fig. 5) with a plurality of pixel cells of array distribution in the LCD 60 earlier.Please refer to Fig. 6, when keeping in second picture data 522 to internal memory 56, corresponding to first group of pixel information of first group of pixel cell 62A (Fig. 5), with as second reference 532, and wherein each pixel information 532p is intactly stored in temporary second picture data 522 of the present invention.As shown in Figure 7, each reference pixel data 532p has 48 sites (Fig. 6 label 55).
Please refer to Fig. 7, the temporary mode that cooperates Fig. 6 second picture data 522, when keeping in three-picture data 523 to internal memory 56, in the temporary three-picture data 523 of the present invention corresponding to second group of pixel information of second group of pixel cell 62B (Fig. 5), with as the 3rd reference 533, wherein each pixel information 533p is intactly stored.As shown in Figure 7, each reference pixel data 533p has 48 sites (Fig. 7 label 55).
As above-mentioned in like manner analogizing, then the synoptic diagram that other reference can Fig. 8 in the reference stream is as can be known represented.As shown in Figure 8:
Reference pixel data 532p in second reference 532 is corresponding with first group of pixel cell 62A of Fig. 5 LCD 60;
Reference pixel data 533p in the 3rd reference 533 is corresponding with second group of pixel cell 62B of Fig. 5 LCD 60;
Reference pixel data 534p in the 4th reference 534 is corresponding with first group of pixel cell 62A of Fig. 5 LCD 60;
The reference pixel data 535p that Wucan is examined in the data 535 is corresponding with second group of pixel cell 62B of Fig. 5 LCD 60 ... analogize with this rule.
By mutual the supplying of the reference of adjacent two pictures, and when utilizing LCD 60 to carry out video picture, the persistence of vision effect that the picture fast updating is brought.The present invention can effectively improve the shortcoming of image color distortion in the known technology.As shown in Figure 8, each reference pixel data 532p, 533p, 534p and 535p are all 48, each pixel information 222p is incomplete storage in the known technology of Fig. 4, only there are 32, the present invention is significantly under internal memory 56 unaltered situations, for the color distortion shortcoming of known liquid crystal drive system provides solution.
About implementing when of the present invention, how a plurality of pixel cells divide into groups to become above-mentioned first group of pixel cell 62A and second group of pixel cell 62B in the LCD 60, and multiple implementation method is arranged, and will be described below:
＜grouping embodiment A 〉
Please refer to Fig. 9, embodiment A is the odd number of pixels unit with odd number bar scanning linear in the LCD, and the even number pixel cell of even number bar scanning linear is defined as first group of pixel cell; And the even number pixel cell of odd number bar scanning linear, and the odd number of pixels unit of even number bar scanning linear is defined as second group of pixel cell.
Same, two groups of pixel cells that obtain through grouping in the embodiment A can be changed mutually as another kind of embodiment.
＜grouping Embodiment B 〉
Please refer to Figure 10, Embodiment B is that the odd number of pixels unit with scanning linear in the LCD is defined as first group of pixel cell; And the even number pixel cell of scanning linear is defined as second group of pixel cell.
Same, two groups of pixel cells that obtain through grouping in the Embodiment B can be changed mutually as another kind of embodiment.
＜grouping Embodiment C 〉
Please refer to Figure 11.Because the pixel cell that LCD has a plurality of array distribution, wherein each pixel cell has pixel cell three times, with the redness of representing this pixel cell respectively, green and blue the composition.Therefore, Embodiment C is that each pixel cell in the LCD is further divided into one red pixel (R sub-pixel), one green pixel (G sub-pixel) and one blue pixel (B sub-pixel).And, be unit carrying out pixel cell when grouping with these times pixel, with the odd number time pixel cell of odd number bar scanning linear, and the even number of even number bar scanning linear time pixel definition is first group pixel cell; And with the inferior pixel of the even number of odd number bar scanning linear, and the odd number of even number bar scanning linear time pixel definition is second group pixel cell.
Same, two groups pixel cells that obtain through grouping in the Embodiment C can be changed mutually as another kind of embodiment.
＜grouping embodiment D 〉
Please refer to Figure 12, embodiment D is the odd number of pixels unit with 4n+1,4n+2 bar scanning linear (n＞0～767) in the LCD, and the even number pixel cell of 4n+3,4n+4 bar scanning linear (n＞0～767) is defined as first group of pixel cell; And the even number pixel cell of 4n+1,4n+2 bar scanning linear (n＞0～767), and the odd number of pixels unit of 4n+3,4n+4 bar scanning linear (n＞0～767) is defined as second group of pixel cell.
＜grouping embodiment E 〉
Please refer to Figure 13, embodiment E is with the odd number of 4n+1,4n+2 bar scanning linear (n＞0～767) in the LCD time pixel, and the even number time pixel definition of 4n+3,4n+4 bar scanning linear (n＞0～767) is first group pixel cell; And the even number of 4n+1,4n+2 bar scanning linear (n＞0～767) time pixel, and the odd number time pixel definition of 4n+3,4n+4 bar scanning linear (n＞0～767) is for organizing for the second time pixel cell.
＜grouping embodiment F 〉
Embodiment F is that the inferior pixel cell of the odd number of scanning linear in the LCD is defined as pixel cell first group time; And the even number of scanning linear time pixel cell is defined as pixel cell second group time.
Same, two groups pixel cells that obtain through grouping in the embodiment F can be changed mutually as another kind of embodiment.
More than about embodiments of the invention, all belong to all pixel cells with LCD and be grouped into first group of pixel cell and second group of pixel cell (or first group with second group pixel cell), and the mutual unduplicated situation of pixel cell in first group of pixel cell and the second group of pixel cell.With 48 of the derations of signal of high display resolution, for example in the embodiment A, first group of pixel cell and second group of pixel cell all can become the data of 24 of the derations of signal, therefore can intactly keep in to have only 32 internal memory to the deration of signal.All be this situation with regard to the foregoing description A～F, though in have 6 the deration of signal and be not used, embodiment A～F all can provide than the better display quality of known technology, improves known color distortion shortcoming.
If will the residue figure place of internal memory be used, then can be when temporary first group of pixel information, except temporary data corresponding to first group of pixel cell, the data of second group of pixel cell of additional storage part again, otherwise Yi Ran.Thus, the production method of overdrive voltage of the present invention comprises the following step:
Step 801: temporary one first group of pixel information, this first group of pixel information comprise in the last picture data, corresponding to a plurality of complete pixel data of this first group of pixel cell, reach the pixel information corresponding to a plurality of parts of this second group of pixel cell.
Step 803: current picture data and first group of temporary pixel information are compared, to calculate the overdrive voltage of current picture data.
Step 805: temporary one second group of pixel information, this second group of pixel information comprise in the current picture data, corresponding to a plurality of complete pixel data of this second group of pixel cell, reach the pixel information corresponding to a plurality of parts of this first group of pixel cell.
Step 807: next picture data and second group of temporary pixel information are compared, to calculate the overdrive voltage of next picture data.
Comprehensively the above can have the embodiment of various deformation as can be known about the group technology that forms first group of pixel cell and second group of pixel cell.Wherein,, utilize the grouping of pixel cell, so that the correlation technique that can be possessed its originally complete position data by temporary pixel cell all should belong to extension of the present invention individually if under the known limitation of liquid crystal drive system internal memory.By the present invention, the dawn does not make the technical bottleneck that liquid crystal drive system is met with when breaking through the high display resolution of LCD, and make the color of show image keep its validity, the more important thing is the present invention has overcome increases the internal memory hardware cost when internal memory deration of signal is not enough certainty, in the future when if the demand of the display resolution of high standard is more arranged, the not enough situation of the internal memory deration of signal that the present invention can be applicable to be correlated with.
Though the present invention illustrates as above with preferred embodiments, so it is not in order to limit the present invention's spirit and invention entity, only to terminate in the foregoing description.To being familiar with this operator, when understanding and utilize other assembly or mode to produce identical effect easily.Be with, the modification of being done in not breaking away from spirit of the present invention and scope all should be included in the described claim.
Claims (11)
1. overdrive voltage production method, quicken to rotate to required angle in order to produce overdrive voltage with the liquid crystal molecule that drives in the LCD, this LCD has the pixel cell of a plurality of array distribution, it is characterized in that these a plurality of pixel cells can be grouped into one first group of pixel cell and one second group of pixel cell, this overdrive voltage production method comprises the following steps:
Corresponding to first group of pixel data of this first group of pixel cell, wherein each pixel information is intactly stored in the temporary last picture data;
Current picture data and this temporary first group of pixel information are compared, to calculate the overdrive voltage of current picture data;
Corresponding to second group of pixel data of this second group of pixel cell, wherein each pixel information is intactly stored in temporary this current picture data; And
Next picture data and this temporary second group of pixel information are compared, to calculate the overdrive voltage of next picture data.
2. overdrive voltage production method as claimed in claim 1 is characterized in that this first group of pixel cell wherein comprises the odd number of pixels unit of odd number bar scanning linear in this LCD, and the even number pixel cell of even number bar scanning linear; And this second group of pixel cell comprises the even number pixel cell of odd number bar scanning linear in this LCD, and the odd number of pixels unit of even number bar scanning linear.
3. overdrive voltage production method as claimed in claim 1 is characterized in that this first group of pixel cell wherein comprises the even number pixel cell of odd number bar scanning linear in this LCD, and the odd number of pixels unit of even number bar scanning linear; And this second group of pixel cell comprises the odd number of pixels unit of odd number bar scanning linear in this LCD, and the even number pixel cell of even number bar scanning linear.
4. overdrive voltage production method as claimed in claim 1 is characterized in that this first group of pixel cell wherein comprises the odd number of pixels unit of scanning linear in this LCD; And this second group of pixel cell comprises the even number pixel cell of scanning linear in this LCD.
5. overdrive voltage production method as claimed in claim 1 is characterized in that this first group of pixel cell wherein comprises the even number pixel cell of scanning linear in this LCD; And this second group of pixel cell comprises the odd number of pixels unit of scanning linear in this LCD.
6. overdrive voltage production method, quicken to rotate to required angle in order to produce overdrive voltage with the liquid crystal molecule that drives in the LCD, this LCD has the pixel cell of a plurality of array distribution, wherein each above-mentioned pixel cell has pixel cell three times, with the redness of representing this pixel cell respectively, green and blue the composition, whole those times pixel cells that it is characterized in that this LCD can be grouped into one first group pixel cell and one second group pixel cell, and this overdrive voltage production method comprises the following steps:
Corresponding to first group pixel data of this first group pixel cell, wherein each time pixel information is intactly stored in the temporary last picture data;
Current picture data and this first group time temporary pixel information are compared, to calculate the overdrive voltage of current picture data;
Corresponding to second group pixel data of this second group pixel cell, wherein each time pixel information is intactly stored in temporary this current picture data; And
Next picture data and this second group time temporary pixel information are compared, to calculate the overdrive voltage of next picture data.
7. overdrive voltage production method as claimed in claim 6 is characterized in that wherein this first group pixel cell comprises the odd number time pixel cell of odd number bar scanning linear in this LCD and the even number time pixel cell of even number bar scanning linear; And this second group pixel cell comprises the even number time pixel cell of odd number bar scanning linear in this LCD and the odd number time pixel cell of even number bar scanning linear.
8. overdrive voltage production method as claimed in claim 6 is characterized in that wherein this first group pixel cell comprises the even number time pixel cell of odd number bar scanning linear in this LCD and the odd number time pixel cell of even number bar scanning linear; And this second group pixel cell comprises the odd number time pixel cell of odd number bar scanning linear in this LCD and the even number time pixel cell of even number bar scanning linear.
9. overdrive voltage production method as claimed in claim 6 is characterized in that wherein this first group inferior pixel cell of odd number that inferior pixel cell comprises scanning linear in this LCD; And this second group inferior pixel cell of even number that inferior pixel cell comprises scanning linear in this LCD.
10. overdrive voltage production method as claimed in claim 6 is characterized in that wherein this first group inferior pixel cell of even number that inferior pixel cell comprises scanning linear in this LCD; And this second group inferior pixel cell of odd number that inferior pixel cell comprises scanning linear in this LCD.
11. overdrive voltage production method, quicken to rotate to required angle in order to produce overdrive voltage with the liquid crystal molecule that drives in the LCD, this LCD has the pixel cell of a plurality of array distribution, it is characterized in that these a plurality of pixel cells can be grouped into one first group of pixel cell and one second group of pixel cell, this overdrive voltage production method comprises the following steps:
Temporary one first group of pixel information, this first group of pixel information comprise in the last picture data, corresponding to a plurality of complete pixel data of this first group of pixel cell, reach the pixel information corresponding to a plurality of parts of this second group of pixel cell;
Current picture data and this temporary first group of pixel information are compared, to calculate the overdrive voltage of current picture data;
Temporary one second group of pixel information, this second group of pixel information comprise in the current picture data, corresponding to a plurality of complete pixel data of this second group of pixel cell, reach the pixel information corresponding to a plurality of parts of this first group of pixel cell; And
Next picture data and this temporary second group of pixel information are compared, to calculate the overdrive voltage of next picture data.
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| CNB2004100570162A CN100405448C (en) | 2004-08-20 | 2004-08-20 | Over driving voltage producing method in liquid crystal driving system |
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| CN101266760B (en) * | 2007-03-13 | 2010-11-10 | 凌阳科技股份有限公司 | Method and system for integrating reverse crossing and over-driving to process image data on LCD |
| CN101436390A (en) * | 2007-11-16 | 2009-05-20 | 瑞昱半导体股份有限公司 | Method and device for adjusting display reaction time |
| CN101458903B (en) * | 2007-12-14 | 2011-12-07 | 佳世达科技股份有限公司 | Compensation device, method and electronic system applying the compensation device |
| CN106875884B (en) * | 2016-12-30 | 2020-06-26 | 歌尔科技有限公司 | Method and device for drawing monochromatic screen and electronic equipment |
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| CN1052565A (en) * | 1989-12-14 | 1991-06-26 | 夏普公司 | The driving circuit of LCD |
| JP2650479B2 (en) * | 1989-09-05 | 1997-09-03 | 松下電器産業株式会社 | Liquid crystal control circuit and liquid crystal panel driving method |
| US6177917B1 (en) * | 1997-04-17 | 2001-01-23 | Sharp Kabushiki Kaisha | Liquid crystal display device and method for driving the same |
| CN1392528A (en) * | 2001-06-19 | 2003-01-22 | 三星电子株式会社 | Liquid crystal display device and method for driving liquid crystal display device |
| CN1512478A (en) * | 2002-12-19 | 2004-07-14 | ������������ʽ���� | Liquid crystal display device |
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| JP2650479B2 (en) * | 1989-09-05 | 1997-09-03 | 松下電器産業株式会社 | Liquid crystal control circuit and liquid crystal panel driving method |
| CN1052565A (en) * | 1989-12-14 | 1991-06-26 | 夏普公司 | The driving circuit of LCD |
| US6177917B1 (en) * | 1997-04-17 | 2001-01-23 | Sharp Kabushiki Kaisha | Liquid crystal display device and method for driving the same |
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