CN101425273B - LCD drive method and device - Google Patents
LCD drive method and device Download PDFInfo
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- CN101425273B CN101425273B CN2007101851720A CN200710185172A CN101425273B CN 101425273 B CN101425273 B CN 101425273B CN 2007101851720 A CN2007101851720 A CN 2007101851720A CN 200710185172 A CN200710185172 A CN 200710185172A CN 101425273 B CN101425273 B CN 101425273B
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Abstract
The invention provides a liquid drive method and a liquid drive device. The drive method is used for driving the pixel of a monitor and comprises the following steps that a compensation gray-scale value is used to drive the pixel to cause the pixel to change from an initial gray-scale value to a target gray-scale value within the frame time, and the compensation gray-scale value is a compensation gray-scale curve determined according to the initial gray-scale value and the target gray-scale value, wherein the compensation gray-scale curve is simulated by polynominal curves and utilized to determine the compensation gray-scale value.
Description
Technical field
The present invention relates to a kind of LCD drive method and device, relate in particular to a kind of LCD drive method and device, the overdrive fragment linear characteristic of GTG value curve of its utilization reaches the effect that liquid crystal is overdrived.
Background technology
In the prior art, liquid crystal has to be unable to cope with the shortcoming that changes fast dynamic image because of transmissivity changes according to its response effect.For addressing this is that, in the prior art, utilize and apply the overdrive mode higher than general liquid crystal drive voltage, improve the method for response speed of liquid crystal.Generally in order to realize that liquid crystal drive voltage according to input draws a higher overdrive voltage, use the table of comparisons (Over-drive Look-Up Table) of overdriving to reach, this table of comparisons of overdriving for example can be internal memory.
See also Fig. 1, its for the overdriving of conventional LCD drive method (Over-drive, OD) table of comparisons (Look-Up Table, LUT).As shown in Figure 1, existing over-driving method is to set up initial GTG value (initial value) (or last picture GTG value at present; Previousvalue) a corresponding target gray scale value (target value) (or this picture GTG value; Overdriving current value) (Over-drive, OD) table of comparisons (Look-Up Table, LUT); Utilize this table of comparisons of overdriving (OD LUT) to apply the overdrive mode higher, to improve the method for response speed of liquid crystal than general liquid crystal drive voltage.In general; If this LCD can show 0～255 GTG; Basically just need 255 initial GTG values and correspond to 255 target gray scale values, just need store 255*255 over-drive value, will cause the excessive feasible whole cost of internal memory to rise.In order to solve the excessive problem of internal memory, initial GTG value and target gray scale value are cut.As shown in Figure 1,0～8 GTG of initial GTG value is that the first initial GTG is interval, and 8～16 GTGs are that the second initial GTG is interval ... by that analogy; Same, 0～8 GTG of target gray scale is that first target gray scale is interval, 8～16 is that second target gray scale is interval ... by that analogy.
And the table of comparisons of the prior art (Look-Up Table; LUT) initial GTG value (initial value) must be identical intervals and interval value with the corresponding relation of target gray scale value (target value) in; So must be the table of comparisons (the Look-Up Table of a N*N form; LUT); For example initial as stated GTG value (initial value) writes down an over-drive value with per 8 GTGs of target gray scale value (target value), and the over-drive value in the middle of the intervals then utilizes interpolation method to learn.As shown in Figure 1.When the N value is big more, then the needed frame buffer (Frame Buffer) and the table of comparisons (LUT) are just big more in the liquid crystal system.In the design of existing product, mostly the N value is set and become 32 even 16.Advantage in the existing techniques is its design concept because without any need for the judgement formula, thus be easy to design and hardware designs comparatively simple, can put into practice in limited hardware and be issued to the effect of overdriving.
Yet in order to reduce hardware cost, the N value definitely can not be big in the conventional method, because so regular meeting appears at the target gray scale brightness (target grayscale luminance) that can't reach required in the time or takes place the situation that surpasses target gray scale brightness.If do not reach target gray scale brightness, in other words, just the response time of liquid crystal improves few; If but, make image quality not good in order to reach the required liquid crystal response time and need to reach the white balance effect again and cause colour cast (Color Shift).Therefore the effect of of the prior art overdriving (OD) method overdrive (OD) that desire to reach then can become quite limited.
Duty is event, and the present invention is an idea of thinking and improve invention in view of the disappearance of prior art, invents out " LCD drive method and the device " of this case.
Summary of the invention
Fundamental purpose of the present invention is for providing a kind of LCD drive method and device; The overdrive linear characteristic of fragment of GTG value curve of utilization; Application Design goes out the table of comparisons of overdriving of the present invention, can simplify the needed internal memory of hardware, and can reach the effect that liquid crystal is overdrived.
Another object of the present invention is for providing a kind of LCD drive method and device; The table of comparisons in the prior art (Look-Up Table, LUT) reduction computer hardware, the characteristic of minimizing required memory have not only been possessed; The one GTG value of overdriving comparatively accurately more can be provided, to reach the effect that liquid crystal is overdrived.
For reaching above-mentioned purpose, the present invention provides a kind of LCD drive method, comprises the following step:
Utilization this GTG value curve of overdriving of GTG value curve and polynomial expression simulation of overdriving is set up the table of comparisons of overdriving, and obtains the target gray scale value and initial GTG value of turning point;
The initial GTG value corresponding according to turning point utilizes binary approach to determine previous view data to belong to the pairing numerical value of section of initial GTG value;
The pairing numerical value of section that this previous view data is belonged to initial GTG value also outputs to the reference position table of comparisons, as the INADD of this reference position table of comparisons;
Utilize the INADD of this reference position table of comparisons corresponding data content as the turning point data table of comparisons;
Find all turning point data according to this turning point numerical value table of comparisons to the GTG value curve of should overdriving;
The target gray scale value corresponding according to this turning point utilizes binary approach decision current image data to belong to the section of target gray scale value;
According to the pairing numerical value of section of this current image data place target gray scale value and the section value corresponding at previous view data place, utilize this table of comparisons of overdriving, pairing multinomial coefficient is read;
Multinomial coefficient is sent into over-drive value calculation unit;
This over-drive value calculation unit receives this current image data and from the multinomial coefficient of this table of comparisons of overdriving, calculates this GTG value of overdriving, this current image data of output of overdriving.
This case must be by with following diagram and detailed description, in order to do more deep understanding.
Description of drawings
Fig. 1 for the overdriving of conventional LCD drive method (Over-drive, OD) table of comparisons (Look-Up Table, LUT).
Fig. 2 is GTG value curve (OD Curve) synoptic diagram of overdriving of conventional liquid crystal panel.
Fig. 3 a～3d is that the initial GTG value of the preferred embodiment of the present invention is the linear synoptic diagram of the GTG value curve segment of overdriving of 0 GTG.
Fig. 4 is overdrive GTG value curve and target gray scale value, initial GTG value and the turning point synoptic diagram of the preferred embodiment of the present invention.
Fig. 5 is the GTG value table of comparisons synoptic diagram of overdriving of the preferred embodiment of the present invention.
Fig. 6 is the LCD drive g device block schematic diagram of first preferred embodiment of the invention.
Fig. 7 is the LCD drive g device block schematic diagram of second preferred embodiment of the invention.
Fig. 8 is the LCD drive method schematic flow sheet of second preferred embodiment of the invention.
The primary clustering symbol description
110 image input blocks
121,122 dichotomy unit
130 frame buffer controllers
140 frame buffers
150 over-drive value calculation unit
160 internal memories
170 tables of comparisons of overdriving
180 image data-outputting units
210 image input blocks
221,222 dichotomy unit
230 frame buffer controllers
240 frame buffers
The 250 reference position tables of comparisons
260 turning points (judge point) the data table of comparisons
270 over-drive value calculation unit
281,282,283 Memory Controller Hub
290 tables of comparisons of overdriving
300 image data-outputting units
Embodiment
For describing LCD drive method of the present invention and device, with following specific embodiment explanation, right interest field of the present invention is not confined to following embodiment.
See also Fig. 2, it is for GTG value curve (ODCurve) synoptic diagram of overdriving of conventional liquid crystal panel.Therefore the GTG value of overdriving (OD value) as shown in Figure 2, that different initial GTG values is corresponding different with different target gray scale values produces the GTG value curve (OD Curve) of overdriving as shown in Figure 2.Can know that according to the GTG value curve (OD Curve) of overdriving shown in Figure 2 all GTG value curves of overdriving all can be divided into the characteristic of fragment quafric curve; Utilize the characteristic of the fragment quafric curve of this GTG value curve of overdriving, Application Design goes out LCD drive method of the present invention and device.
See also Fig. 3 a～3d, it is the linear synoptic diagram of the GTG value curve segment of overdriving of 0 GTG for the initial GTG value of the preferred embodiment of the present invention.Shown in Fig. 3 a, the GTG value curve of overdriving that initial GTG value is 0 GTG can be divided into fragment I, II, the III of three quafric curves, has two turning points (judge point).Utilize two turning points and overdrive GTG value and target gray scale value and three curve second order polynomial (Y=ax of the Origin And Destination of the GTG value curve of overdriving
2+ bx+c) can be similar to three curve segment I, II, the III of this GTG value curve of overdriving; The GTG value of wherein overdriving curve linear fragment I, II, III have three sets of curves second order polynomial coefficient a, b, c respectively; Wherein x represents the target gray scale value, and Y represents the GTG value of overdriving.Utilize known coefficient a, b, c numerical value to set up and be stored in the table of comparisons of overdriving (OD LUT, Over-drive Look-up Table).According to shown in Figure 2, can know that the GTG value curve of overdriving under the actual state should have 256 curves, yet, only have tens of so actual needs uses the representational GTG value curve of overdriving because some curve approximation overlaps.Therefore can utilize representational method of overdriving GTG value curve and curve segment to set up the table of comparisons of overdriving.Utilize this table of comparisons of overdriving (ODLUT) can reach the effect that liquid crystal is overdrived.The present invention has not only possessed the table of comparisons in the prior art (Look-Up Table, LUT) reduction computer hardware has reduced the characteristic of required memory, on the degree of accuracy of GTG value is overdrived in generation, have improved the shortcoming on the prior art especially greatly again.
See also Fig. 4, it is overdrive GTG value curve and target gray scale value, initial GTG value and the turning point synoptic diagram of the preferred embodiment of the present invention.Initial GTG value as shown in Figure 4, different, its curve of overdriving three curve segment capable of using or a plurality of curve segment are similar to its corresponding curve of overdriving.If utilize three curve segment to be similar to its corresponding curve of overdriving, promptly have two turning points; If utilize four curve segment to be similar to its corresponding curve of overdriving, promptly have three turning points; If utilize five curve segment to be similar to its corresponding curve of overdriving, promptly have four turning points, by that analogy.
See also Fig. 5, it is for the GTG value table of comparisons synoptic diagram of overdriving of the preferred embodiment of the present invention.As shown in Figure 5; The curves of overdriving that the GTG value table of comparisons utilizes curve segment to be similar to different initial its correspondences of GTG value because this is overdrived produce, and therefore the intervals and the interval value of this initial GTG value might not be identical intervals and interval values.Same, the intervals of this target gray scale value and interval value also are not necessarily identical intervals and interval value.In other words, the curve characteristic of curve is neither identical because each bar is overdrived, so overdrive intervals and the intervals of this target gray scale value of this initial GTG value of curve of each bar is inequality.What wherein this GTG value table of comparisons of overdriving was stored is the coefficient value of the corresponding curve segment of each bar curve.
Can know to have what intervals by Fig. 5, promptly represent this curve of overdriving to utilize how many linear fragments to be similar in the pairing target gray scale value in arbitrary interval of initial GTG value.
See also Fig. 6, it is the LCD drive g device block schematic diagram of first preferred embodiment of the invention.In this embodiment, set each bar over-drive value curve break (judgepoint) count and the pairing target gray scale value of turning point all identical.
As shown in Figure 6, this LCD drive g device comprises: image input block 110, two dichotomy unit 121,122, frame buffer controller 130, frame buffer 140, over-drive value calculation unit 150, Memory Controller Hub 160, the overdrive table of comparisons 170 and image data-outputting unit 180.This image input block 110 receives view data, and this view data can be gray scale image or coloured image.If this view data is a coloured image, then this view data comprises red (R) look, green (G) look, three kinds of view data of indigo plant (B) look.
Present t1 constantly, this image input block 110 receives current image datas, and this image input block 110 is sent to this dichotomy unit 121 with this current image data.This dichotomy unit 121 has stored the corresponding turning point of all initial GTGs, according to this turning point and present input image data, utilizes this current image data of binary approach decision to belong to the section of initial GTG value.Can calculate the section that this current image data belongs to initial GTG value via this dichotomy unit 121, this section value corresponding is stored in this section value corresponding among this frame buffer 140 via this frame buffer controller 130.This frame buffer controller 130 is also read the section value corresponding that the previous view data of previous moment t0 belongs to initial GTG value by this frame buffer 140, be sent to this Memory Controller Hub 160.
The current image data that this dichotomy unit 122 receives from this image input block 110.This dichotomy unit 122 has stored corresponding turning point and the current image data of all target gray scale, according to this turning point and current image data, utilizes the section of this current image data place target gray scale value of binary approach decision.Can calculate the section that this current image data belongs to the target gray scale value via this dichotomy unit 122, this section value corresponding is sent into this Memory Controller Hub 160, this Memory Controller Hub 160 deposits this section value corresponding among the internal memory in.According to the pairing numerical value of section of this current image data place target gray scale value and the section value corresponding at previous view data place; Utilize the existing table of comparisons 170 of overdriving, this over-drive value calculation unit 150 is read and sent into to the pairing GTG value of overdriving (OD value).This over-drive value calculation unit 150 receives these current image datas and from this GTG value of overdriving of this table of comparisons 170 of overdriving, this current image data of output of overdriving is to this image data-outputting unit 180.By the output of overdriving of these image data-outputting unit 180 these current image datas of output, to drive liquid crystal panel.
In the above-described embodiments; If this current image data is a coloured image; Then this current image data comprises red (R) look, green (G) look, three kinds of view data of indigo plant (B) look; Can be directed against red (R) look, green (G) look, three kinds of view data of indigo plant (B) look respectively, utilize binary approach to determine three kinds of view data to belong to the section of initial GTG value respectively.Three numerical value that each section is corresponding are stored in each section value corresponding among this frame buffer 140 via this frame buffer controller 130.This frame buffer controller 130 is also read the section value corresponding that the previous view data of previous moment t0 belongs to initial GTG value by this frame buffer 140, be sent to this Memory Controller Hub 160.
In like manner, three kinds of view data that this dichotomy unit 122 receives from this image input block 110 utilize binary approach to determine the section of three kinds of view data place target gray scale values.Can calculate the section of three kinds of view data place target gray scale values via this dichotomy unit 122, each section value corresponding is sent among this Memory Controller Hub 160.According to three kinds of pairing numerical value of each section of color of this current image data place target gray scale value and each section value corresponding of three kinds of colors at previous view data place; Utilize the existing table of comparisons 170 of overdriving, this over-drive value calculation unit 150 is read and sent into to each GTG value of overdriving of pairing three kinds of colors.This over-drive value calculation unit 150 receives these current image datas and from this GTG value of overdriving of this table of comparisons 170 of overdriving, this current image data of output of overdriving is to this image data-outputting unit 180.By the output of overdriving of these image data-outputting unit 180 these current image datas of output, to drive liquid crystal panel.
Suppose that integral body has 32 GTG value curves (OD Curve) of overdriving, and then can utilize 5 (bits) data to represent that this current image data belongs to the section of initial GTG value again.These frame buffer 140 stored data can replace with above-mentioned 5 (bits) data.In like manner, this frame buffer controller 130 is read 5 corresponding (bits) data of section that the previous view data of previous moment t0 belongs to initial GTG value by this frame buffer 140, be sent to this Memory Controller Hub 160.This dichotomy unit 122 can calculate the section of this current image data place target gray scale value, can utilize 5 (bits) data to represent the section of this current image data place target gray scale value.5 (bits) data that this section is corresponding are sent among this Memory Controller Hub 160.According to pairing 5 bit data of section of this current image data place target gray scale value and the 5 corresponding bit data of section at previous view data place; Utilize the existing table of comparisons 170 of overdriving, this over-drive value calculation unit 150 is read and sent into to the pairing GTG value of overdriving.This over-drive value calculation unit 150 receives these current image datas and from this GTG value of overdriving of this table of comparisons 170 of overdriving, this current image data of output of overdriving is to this image data-outputting unit 180.By the output of overdriving of these image data-outputting unit 180 these current image datas of output, to drive liquid crystal panel.
See also Fig. 7, it is the LCD drive g device block schematic diagram of second preferred embodiment of the invention.As shown in Figure 7, this LCD drive g device comprises: image input block 210, two dichotomy unit 221,222, frame buffer controller 230, frame buffer 240, the reference position table of comparisons 250, the turning point data table of comparisons 260, over-drive value calculation unit 270, Memory Controller Hub 281,282,283, the overdrive table of comparisons 290 and image data-outputting unit 300.
This image input block 210 receives view data, and this view data can be gray scale image or coloured image.If this view data is a coloured image, then this view data comprises red (R) look, green (G) look, three kinds of view data of indigo plant (B) look.
Present t1 constantly, this image input block 210 receives current image datas, and this image input block 210 is sent to this dichotomy unit 221 with this current image data.This dichotomy unit 221 has stored the corresponding turning point of all initial GTGs; According to this turning point and current image data; Utilize this current image data of binary approach decision to belong to the section of initial GTG value, in other words, find the corresponding GTG value curve (OD Curve) of overdriving exactly.Can calculate the section that this current image data belongs to initial GTG value via this dichotomy unit 221; That is the pairing GTG value curve (OD Curve) of overdriving, this section value corresponding is stored in this section value corresponding among this frame buffer 240 via this frame buffer controller 230.This frame buffer controller 230 is also read the section value corresponding that the previous view data of previous moment t0 belongs to initial GTG value by this frame buffer 240, be sent to this Memory Controller Hub 281.
Again, suppose that integral body has 32 GTG value curves (OD Curve) of overdriving and is example, then can utilize 5 (bits) data to represent that this current image data belongs to the section of initial GTG value.That is these frame buffer 240 stored data promptly are this 5 bit data.
This 5 bit data that is read by this Memory Controller Hub 281 is input to this reference position table of comparisons 250; As the INADD (Input Address) of this reference position table of comparisons 250, by these reference position table of comparisons 250 corresponding data content INADD (Input Address) that promptly is this turning point data table of comparisons 260.Then find all turning point data to the GTG value curve (OD Curve) of should overdriving by this turning point numerical value table of comparisons 260.These all turning point data of overdriving GTG value curve (OD Curve) are sent into this dichotomy unit 222 via this Memory Controller Hub 282.
This dichotomy unit 222 also receives this current image data from this image input block 210.All turning points that this dichotomy unit 222 receives from this Memory Controller Hub 282 according to this turning point and current image data, utilize the section of this current image data place target gray scale value of binary approach decision.Can calculate the section of this current image data place target gray scale value via this dichotomy unit 222, this section value corresponding is sent among this Memory Controller Hub 283.This Memory Controller Hub 283 receives the start position data that section value corresponding that previous view data from this Memory Controller Hub 281 belongs to initial GTG value is found again, and sends among this Memory Controller Hub 283.
Belong to the pairing numerical value of section of target gray scale value and the start position data of the section value corresponding that previous view data belongs to according to this current image data; Utilize the existing table of comparisons 290 of overdriving, this over-drive value calculation unit 270 is read and sent into to pairing multinomial coefficient.This over-drive value calculation unit 270 receives these current image datas and from this multinomial coefficient of the table of comparisons 290 of overdriving, and calculates this GTG value (ODvalue) of overdriving, and this current image data of output of overdriving is to this image data-outputting unit 300.By the output of overdriving of these image data-outputting unit 300 these current image datas of output, to drive liquid crystal panel.
In the above-described embodiments; If this current image data is a coloured image; Then this current image data comprises red (R) look, green (G) look, three kinds of view data of indigo plant (B) look, can be directed against red (R) look, green (G) look, three kinds of view data of indigo plant (B) look respectively, utilizes binary approach to determine three kinds of view data to belong to the section of initial GTG value respectively; In other words, find the corresponding respectively GTG value curve of overdriving exactly.Three numerical value that each section is corresponding are stored in each section value corresponding among this frame buffer 240 via this frame buffer controller 230.This frame buffer controller 230 is also read the section value corresponding that the previous view data of previous moment t0 belongs to initial GTG value by this frame buffer 240, be sent to this Memory Controller Hub 281.
In like manner, these dichotomy unit 222 receptions are from three kinds of view data of this image input block 210.This dichotomy unit 222 receives from the corresponding target gray scale value of all turning points of this Memory Controller Hub 282, and the target gray scale value corresponding according to this turning point utilizes binary approach to determine the section of three kinds of view data place target gray scale values.Can calculate the section of three kinds of view data place target gray scale values via this dichotomy unit 222, each section value corresponding is fed among this Memory Controller Hub 283.Belong to the three kinds of pairing numerical value of each section of color of target gray scale value and the start position data of three kinds of each section value corresponding of color that previous view data belongs to according to this current image data; Utilize the existing table of comparisons 290 of overdriving, this over-drive value calculation unit 270 is read and sent into to pairing multinomial coefficient.This over-drive value calculation unit 270 receives this current image data and calculates this GTG value (ODvalue) of overdriving from this multinomial coefficient of overdriving the table of comparisons 290, and this current image data of output of overdriving is to this image data-outputting unit 300.By the output of overdriving of these image data-outputting unit 300 these current image datas of output, to drive liquid crystal panel.
See also Fig. 8, it is the LCD drive method schematic flow sheet of second preferred embodiment of the invention.As shown in Figure 8, moment t1 receives view data at present, and this view data can be gray scale image or coloured image.If this view data is a coloured image, then this view data comprises red (R) look, green (G) look, three kinds of view data of indigo plant (B) look.Buffer has stored the corresponding turning point of all initial GTG values; According to this turning point and current image data; Utilize this current image data of binary approach decision to belong to the section of initial GTG value, in other words, find the corresponding GTG value curve (OD Curve) of overdriving exactly.This section value corresponding is stored among the frame buffer.This reference position table of comparisons is read and be input to this frame buffer controller also with the section value corresponding that the previous view data of previous moment t0 belongs to initial GTG value by this frame buffer; As the INADD of this reference position table of comparisons, by this reference position table of comparisons corresponding data content INADD that promptly is this turning point data table of comparisons.Then find all turning point data to the GTG value curve of should overdriving by this turning point numerical value table of comparisons.According to this turning point and current image data, utilize the section of this current image data place target gray scale value of binary approach decision.Belong to the pairing numerical value of section of target gray scale value and the initial GTG position data of the section value corresponding that previous view data belongs to according to this current image data; Utilize the existing table of comparisons of overdriving, this over-drive value calculation unit is read and sent into to pairing multinomial coefficient.This over-drive value calculation unit receives this current image data and from the multinomial coefficient of this table of comparisons of overdriving, and calculates this GTG value of overdriving (OD value), and this current image data of output of overdriving is to drive liquid crystal panel.
In the above-described embodiments; If this current image data is a coloured image; Then this current image data comprises red (R) look, green (G) look, three kinds of view data of indigo plant (B) look, can be directed against red (R) look, green (G) look, three kinds of view data of indigo plant (B) look respectively, utilizes binary approach to determine the section of the initial GTG value in the indivedual places of three kinds of view data; In other words, find the corresponding respectively GTG value curve of overdriving exactly.Three numerical value that each section is corresponding are through being stored among this frame buffer.
Specific embodiment of the invention described above and diagram can be understood those skilled in the art, yet protection scope of the present invention is not limited to the foregoing description.
Comprehensively above-mentioned, the object of the invention fully and is effectively disclosed.The present invention can be appointed by those skilled in the art and executes that the craftsman thinks and be to modify as all, and Protector that claim is desired is liked in right neither disengaging enclosed.
Claims (9)
1. driving method, in order to the pixel of driving display, this driving method comprises the following steps:
Using compensation GTG value makes this pixel in frame time (frame time), change to the target gray scale value by initial GTG value to drive this pixel; And
This compensation GTG value is the compensation gray scale curve according to the initial GTG value decision of this target gray scale value and this; Wherein should should compensate gray scale curve by the polynomial expression simulation by the compensation gray scale curve; Utilize and the decision of compensation gray scale curve to be somebody's turn to do compensation GTG value; Wherein this compensation gray scale curve is the GTG value curve of overdriving, and this compensation GTG value is the GTG value of overdriving
Wherein said driving method also comprises the following steps:
Utilize at least one GTG value curve and at least one polynomial expression simulation this at least one GTG value curve of overdriving of overdriving,, and obtain the target gray scale value and initial GTG value of at least one turning point of this GTG value curve of overdriving in order to the foundation table of comparisons of overdriving;
According to this pixel of this at least one turning point and current image data, utilize binary approach to determine this pixel of this current image data to belong to the section of initial GTG value;
The pairing numerical value of section that this pixel of this current image data is belonged to initial GTG value is stored among the frame buffer;
This pixel of reading previous view data from this frame buffer belongs to the pairing numerical value of section of initial GTG value;
According to this pixel of this at least one turning point and this current image data, utilize the section of this pixel place target gray scale value of this current image data of binary approach decision;
According to the section value corresponding at this pixel place of the pairing numerical value of section of this pixel place target gray scale value of this current image data and previous view data, utilize this table of comparisons of overdriving, pairing multinomial coefficient is read; And
Utilize this current image data this pixel place the section value corresponding and from the multinomial coefficient of this table of comparisons of overdriving, calculate this GTG value of overdriving, this pixel of this current image data of output of overdriving.
2. driving method as claimed in claim 1, wherein this polynomial expression is the curve second order polynomial.
3. driving method as claimed in claim 1, wherein this at least one GTG value curve of overdriving utilizes a plurality of curve second order polynomials, with this at least one GTG value curve of overdriving of method approximate simulation of curve segment.
4. driving method as claimed in claim 3, wherein this multinomial coefficient is a curve second order polynomial coefficient.
5. driving method as claimed in claim 1 wherein also comprises the following steps: to utilize this curve second order polynomial coefficient and this current image data to belong to the pairing numerical value of section of target gray scale value, second order polynomial Y=ax promptly capable of using
2+ bx+c calculates this GTG value of overdriving, and wherein this a, b, c are this curve second order polynomial coefficient, and x is the pairing numerical value of section of this current image data place target gray scale value.
6. driving method as claimed in claim 4 wherein also comprises the following steps: to utilize this curve second order polynomial coefficient and this current image data to belong to the pairing numerical value of section of target gray scale value, second order polynomial Y=ax promptly capable of using
2+ bx+c calculates this GTG value of overdriving, and wherein this a, b, c are this curve second order polynomial coefficient, and x is the pairing numerical value of section of this current image data place target gray scale value.
7. a LCD drive method comprises the following steps:
Utilize at least one this GTG value curve of overdriving of GTG value curve and at least one polynomial expression simulation of overdriving,, and obtain the target gray scale value and initial GTG value of at least one turning point of this GTG value curve of overdriving in order to the foundation table of comparisons of overdriving;
According to this at least one turning point and current image data, utilize this current image data of binary approach decision to belong to the section of initial GTG value;
The pairing numerical value of section that this current image data is belonged to initial GTG value is stored among the frame buffer;
Read the pairing numerical value of section that previous view data belongs to initial GTG value from this frame buffer;
According to this at least one turning point and this current image data, utilize the section of this current image data place target gray scale value of binary approach decision;
According to the pairing numerical value of section of this current image data place target gray scale value and the section value corresponding at previous view data place, utilize this table of comparisons of overdriving, pairing multinomial coefficient is read;
Utilize the section value corresponding at this current image data place and, calculate this GTG value of overdriving, this current image data of output of overdriving from the multinomial coefficient of this table of comparisons of overdriving.
8. a LCD drive method comprises the following steps:
Utilize at least one this GTG value curve of overdriving of GTG value curve and at least one polynomial expression simulation of overdriving,, and obtain the target gray scale value and initial GTG value of at least one turning point of this GTG value curve of overdriving in order to the foundation table of comparisons of overdriving;
According to this at least one turning point and current image data, the pairing numerical value of section that utilizes this previous view data of binary approach decision to belong to initial GTG value;
The pairing numerical value of section that this previous view data is belonged to initial GTG value also outputs to the reference position table of comparisons, as the INADD of this reference position table of comparisons;
Utilize the INADD of this reference position table of comparisons corresponding data content as the turning point data table of comparisons;
Find all turning point data according to this turning point numerical value table of comparisons to the GTG value curve of should at least onely overdriving;
According to this turning point and this current image data, utilize the section of binary approach decision current image data place target gray scale value;
According to the pairing numerical value of section of this current image data place target gray scale value and the section value corresponding at previous view data place, utilize this table of comparisons of overdriving, pairing multinomial coefficient is read;
Utilize the section value corresponding at this current image data place and, calculate this GTG value of overdriving, this current image data of output of overdriving from the multinomial coefficient of this table of comparisons of overdriving.
9. LCD drive g device comprises:
The image input block is in order to receive current image data;
The first dichotomy unit; Be electrically connected this image input block; Receive this current image data; This first dichotomy unit has stored the corresponding turning point of all initial GTG values, according to this turning point and this current image data, utilizes this current image data of binary approach decision to belong to the section of initial GTG value;
Frame buffer;
The frame buffer controller; Be electrically connected this first dichotomy unit and this frame buffer; The section value corresponding that this current image data is belonged to initial GTG value is stored among this frame buffer, and the section value corresponding that the previous view data of previous moment belongs to initial GTG value is read by this frame buffer;
First Memory Controller Hub is electrically connected this frame buffer controller, and the section value corresponding that this previous view data is belonged to initial GTG value is stored among this first Memory Controller Hub;
The reference position table of comparisons; Be electrically connected this first Memory Controller Hub; The section value corresponding that this previous view data is belonged to initial GTG value is input to this reference position table of comparisons, as the INADD of this reference position table of comparisons, draws corresponding data content by this reference position table of comparisons;
Second Memory Controller Hub is electrically connected this first Memory Controller Hub, in this reference position table of comparisons, draws corresponding data content by this reference position table of comparisons, is stored in this second Memory Controller Hub;
The turning point data table of comparisons; Be electrically connected this second Memory Controller Hub; This reference position table of comparisons that is stored in this second Memory Controller Hub draws corresponding data content; Promptly be the INADD of this turning point data table of comparisons, then find overdrive all turning point data of GTG value curve of correspondence by this turning point numerical value table of comparisons;
The second dichotomy unit; Be electrically connected this turning point data table of comparisons; Reception is from this current image data of this image input block; And receive from the corresponding turning point of all target gray scale values of this second Memory Controller Hub, according to this turning point and this current image data, utilize the section of this current image data place target gray scale value of binary approach decision;
The 3rd Memory Controller Hub; Be electrically connected this second dichotomy unit and this first Memory Controller Hub; The section value corresponding of this current image data place target gray scale value is stored among the 3rd Memory Controller Hub, and the 3rd Memory Controller Hub receives the start position data that section value corresponding that previous view data from this first Memory Controller Hub belongs to initial GTG value is found;
The table of comparisons of overdriving; Be electrically connected the 3rd Memory Controller Hub; Belong to the pairing numerical value of section of target gray scale value and the start position data of the section value corresponding that previous view data belongs to according to this current image data; Utilize this table of comparisons of overdriving, pairing multinomial coefficient is read;
Over-drive value calculation unit is electrically connected this image input block and the 3rd Memory Controller Hub, receives this current image data and from the multinomial coefficient of this table of comparisons of overdriving, and calculates this GTG value of overdriving; And
Image data-outputting unit is electrically connected this over-drive value calculation unit, receives this current image data of overdriving, by the output of overdriving of this this current image data of image data-outputting unit output.
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| US9370064B2 (en) | 2011-10-06 | 2016-06-14 | National Semiconductor Corporation | LED driver having non-linear compensation |
| CN104409066B (en) | 2014-12-10 | 2017-04-19 | 深圳市华星光电技术有限公司 | Method for acquiring gray-scale compensation value of pixel |
| CN105654920B (en) * | 2015-12-31 | 2018-06-12 | 厦门天马微电子有限公司 | Display device, method for displaying image and gray-scale intensity conversion method |
| CN108877640B (en) * | 2018-09-27 | 2021-11-12 | 京东方科技集团股份有限公司 | Display panel and display panel driving method |
| CN111028761B (en) * | 2019-12-31 | 2021-09-03 | Tcl华星光电技术有限公司 | Display device and overdrive method thereof |
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| TW200535782A (en) * | 2004-04-16 | 2005-11-01 | Vastview Tech Inc | Method of signal processing |
| CN101042832A (en) * | 2007-04-27 | 2007-09-26 | 浙江大学 | Method for building LCD colors characterizing segment and space division model |
| TW200737095A (en) * | 2006-03-20 | 2007-10-01 | Lg Philips Lcd Co Ltd | Apparatus and method for driving liquid crystal display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TW200535782A (en) * | 2004-04-16 | 2005-11-01 | Vastview Tech Inc | Method of signal processing |
| TW200737095A (en) * | 2006-03-20 | 2007-10-01 | Lg Philips Lcd Co Ltd | Apparatus and method for driving liquid crystal display device |
| CN101042832A (en) * | 2007-04-27 | 2007-09-26 | 浙江大学 | Method for building LCD colors characterizing segment and space division model |
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