CN101334984B - Method and apparatus generating extremely drive data - Google Patents
Method and apparatus generating extremely drive data Download PDFInfo
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- CN101334984B CN101334984B CN2008101330821A CN200810133082A CN101334984B CN 101334984 B CN101334984 B CN 101334984B CN 2008101330821 A CN2008101330821 A CN 2008101330821A CN 200810133082 A CN200810133082 A CN 200810133082A CN 101334984 B CN101334984 B CN 101334984B
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Abstract
The invention provides a method for generating over-driving data and a device thereof. The preparation method includes the following steps: (a) a reduced over-driving table and a preset weight value table are stored; (b) according to a previous picture element value and a current picture element value, a first reference value and a second reference value are searched from the reduced over-driving table; (c) according to the current picture element value, a first weighted value and a second weighted value are searched from the preset weight value table; (d) the first reference value, the second reference value, the first weighted value and the second weighted value are used for obtaining an over-driving data. The device comprises a memory unit, a reference value generation unit, a weighted value generation unit and a calculation unit. The method for generating over-driving data and the device can effectively reduce the size of the over-drive table, while the quality of an output picture can be maintained, thus providing a user with more convenience.
Description
Technical field
The present invention relates to a kind of method and device that produces data, relate in particular to a kind of method and device that produces extremely drive data.
Background technology
Please refer to Fig. 1.Fig. 1 be an original uncompressed cross overdrive (over drive) table synoptic diagram.In order to quicken the reaction velocity of liquid crystal in the LCD, generally when driving liquid crystal, all can drive liquid crystal in the mode of overdrive (overdrive).And the size of the GTG value of overdriving is just tabled look-up and is learnt by the table of overdriving, and as shown in Figure 1, F1 represents that the previous picture element value (the GTG value of last picture) preset, F2 represent the present picture element value of presetting (the GTG value of this picture).With 256 rank (8 s') GTG color range, the table of overdriving that is produced will have the size (meaning is 32Kbytes) of 256 * 256 * 256 bytes.And the chip for driving of general LCD can't store large-capacity data like this.
Please refer to Fig. 2.Fig. 2 is the synoptic diagram of the table of overdriving after the reduction.As shown in the figure, Fig. 2 reduces the resolution of Fig. 1, and partial data is wherein cast out.For instance, default previous picture element value is the present picture element value preset within 0～32 within 32～64 time, and the GTG value of overdriving that is corresponded to all is 0.Therefore,, can learn that its big young pathbreaker is reduced to 8 * 8 * 256 bytes (meaning is 64bytes), be significantly less than the not table of overdriving of reduction according to the table of overdriving of Fig. 2.Yet reduce the result of data volume, will cause the power of overdriving not enough and reduce liquid crystal reaction velocity or picture distortion.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of method and device that produces extremely drive data, overcome overdrive in the prior art that watch is excessive, reaction velocity is slow or the shortcoming of picture distortion.
The invention provides a kind of method that produces extremely drive data.It comprises following steps:
(a) store one and reduce overdrive a table and a preset weights table;
(b), overdrive from described reduction and to show to find out one first reference value and one second reference value according to a previous picture element value and a present picture element value;
(c) according to described present picture element value, find out one first weighted value and one second weighted value from described preset weights table; And
(d) utilize described first reference value, described second reference value, described first weighted value and described second weighted value, produce extremely drive data.
The invention provides a kind of extremely drive data generation device, in order to produce an extremely drive data according to a previous picture element value and according to present picture element value.Described extremely drive data generation device comprises:
One storage element reduces overdrive a table and a preset weights table in order to store one;
One reference value generation unit is coupled to described storage element, and described reference value generation unit is used for according to described previous picture element value and described present picture element value, overdrives from described reduction and shows to find out corresponding one first reference value and one second reference value;
One weighted value generation unit is coupled to described storage element, and described weighted value generation unit is used for according to described present picture element value, finds out corresponding one first weighted value and one second weighted value from described preset weights table; And
One computing unit is coupled to described reference value generation unit and described weighted value generation unit, and described computing unit is used for according to described first reference value, described second reference value, described first weighted value and described second weighted value, produces extremely drive data.
Compared with prior art, the method and apparatus of generation extremely drive data of the present invention, can reduce effectively overdrive the table size and can keep output picture quality, the user is provided bigger convenience.
Description of drawings
Fig. 1 is the synoptic diagram of overdriving and showing that an original uncompressed is crossed.
Fig. 2 is the synoptic diagram of the table of overdriving after the reduction.
Fig. 3 is the synoptic diagram that reduction of the present invention is overdrived and shown.
Fig. 4 is the synoptic diagram of preset weights table of the present invention.
Fig. 5 is the synoptic diagram of table with the method for account form generation over-drive value of overdriving after the present invention utilizes reduction.
Fig. 6 is the synoptic diagram of extremely drive data generation device of the present invention.
The previous picture element value that description of reference numerals: F1-is default; The present picture element value that F2-is default; The OD-over-drive value; The 300-table of overdriving; 400-preset weights table; A, b-picture element value; D1, D2-difference; The 500-method; The 501-506-step; 600-extremely drive data generation device; The 610-storage element; 620-reference value generation unit; 630-weighted value generation unit; The 640-computing unit; 621,622, the default picture element value of 623-produces subelement; 624, the sub-reference value of 625-produces subelement.
Embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the present invention is above-mentioned.
Please also refer to Fig. 3 and Fig. 4.Fig. 3 is the overdrive synoptic diagram of table 300 of reduction of the present invention.Fig. 4 is the synoptic diagram of preset weights table 400 of the present invention.As shown in Figure 3, reducing the table 300 of overdriving is formed by default previous picture element value (F1) and the array combination that the present picture element value of presetting (F2) is constituted.And the resolution that the present invention reduces default present picture element value (F2) is with the overdrive size of table 300 of reduction.As shown in the figure, only will the overdrive present picture element value resolution of table 300 of the present invention is reduced to 8 rank by 255 original rank, just is reduced to 3 from originally 8, thus, of the present inventionly crosses GTG table-drive 300 big young pathbreakers and reduces to 256 * 256 * 8 bytes.
As overdrive shown in the table 300, when default previous picture element value be 0, when default present picture element value is 0, pairing over-drive value is OD (0,0); When default previous picture element value be 1, when default present picture element value is 32, pairing over-drive value is OD (1,32); When default previous picture element value be 255, when default present picture element value is 32, pairing over-drive value is OD (255,32) ... the rest may be inferred.So just can utilize the table 300 of overdriving of the present invention, check in required over-drive value to drive LCD according to received previous picture element value and received present picture element value.For instance, when received previous picture element value (X-1) be 0, when received present picture element value (X) is 32, then this moment, the over-drive value that produced was OD (0,32), and the LCD of can this motivation value OD (0,32) overdriving.
When received present picture element value X is not (as 0,32,64,96,128,160,192,224,255) when just being positioned at the default present picture element value of the table 300 of overdriving, the convenient preset weights table 400 of the present invention with Fig. 4, calculate the over-drive value OD that should produce.From the preset weights table 400 of Fig. 4, can find out, when the picture element value X of present reception is not that (suppose that the picture element value that receives at present is a), then the picture element value X of reception is bound to drop between the default present picture element value F2 (a-) and F2 (a+) at present during just for default present picture element value.For instance, if the picture element value X that receives is 44 at present, then 44 can drop between default present picture element value F2 (44-) and the present picture element value F2 (44+), wherein, F2 (44-) equals 32, and F2 (44+) equals 64.And receive the pairing over-drive value OD of picture element value X at present, can according between present reception picture element value X and default present picture element value F2 (a-) and the F2 (a+) weighted value, the over-drive value that goes out of correspondence decide.As shown in Figure 4, when present reception picture element value X is a, its difference with default present picture element value F2 (a-) be D1 (equaling a-F2 (a-)), with the difference of default present picture element value F2 (a-) be that D2 (equals F2 (a+)-a).When then receiving picture element value X at present and being a, equal (a-F2 (a-))/(F2 (a+)-F2 (a-)), equal (F2 (a+)-a)/(F2 (a+)-F2 (a-)) with the weighted value P2 of default present picture element value F2 (a+) with the weighted value P1 of default present picture element value F2 (a-).
Therefore, the picture element value (X-1) when previous reception is b, when the present picture element value X that receives is a, then can finds out corresponding to receiving default present picture element value F2 (a-) and the F2 (a-) that picture element value X is a at present earlier according to preset weights table 400.Again according to the table 300 of overdriving, find out corresponding to default previous picture element value F1 be b with the default present picture element value F2 over-drive value OD that is F2 (a-) (b, a-); And find out corresponding to default previous picture element value F1 be b with the default present picture element value F2 over-drive value OD that is F2 (a+) (b, a+).And then with over-drive value OD (b a+) is multiplied by weighted value P2, add over-drive value OD (b a-) is multiplied by weighted value P1, be the over-drive value OD of ask when the previous picture element value (X-1) that receives is a for b, the picture element value X that receives at present (b, a).
Therefore, according to above-mentioned, can sort out over-drive value OD when the previous picture element value (X-1) that receives is a for b, the picture element value X that receives at present (b, it is as follows a) to produce the formula of over-drive value:
P1＝(a-F2(a-))/(F2(a+)-F2(a-)) (1)
P2＝(F2(a+)-a)/(F2(a+)-F2(a-)) (2)
OD(b，a)＝P1×OD(b，a-)+P2×OD(b，a+)?(3)
And the represented mode of the table 300 of overdriving only is a demonstration example, and the mode of the present picture element value of any reduction all belongs to category of the present invention in the overdrive mode of table size of reduction.
Please refer to Fig. 5.Fig. 5 is the synoptic diagram of table with the method 500 of account form generation over-drive value of overdriving after the present invention utilizes reduction.Method 500 in order to produce when the previous picture element value (X-1) that receives be the picture element value X of b, present reception when being a, required over-drive value OD (b, a).Step is described as follows:
Step 501: beginning;
Step 502: store and reduce overdrive table 300 and preset weights table 400;
Step 503: according to the previous picture element value (X-1) that received and the present picture element value X that is received, from described reduction overdrive table found out reference value OD (b, a-) with cross reference value OD (b, a+);
Step 504:, find out one first weighted value P1 and one second weighted value P2 from described preset weights table according to described present picture element value X;
Step 505: utilize described cross reference value OD (b, a-) with cross reference value OD (b, a+), the described first weighted value P1 and one second weighted value P2, produce described over-drive value OD (b, a);
Step 506: finish.
Please refer to Fig. 6.Fig. 6 is the synoptic diagram of extremely drive data generation device 600 of the present invention.As shown in the figure, extremely drive data generation device 600 comprises storage element 610, reference value generation unit 620, weighted value generation unit 630 and computing unit 640.
Reference value generation unit 620 is coupled to storage element 610, be used for according to previous picture element value (X-1) that is received and present picture element value X, the table 300 of overdriving certainly find out the first corresponding reference value OD (b, a-) with the second reference value OD (b, a-).Reference value generation unit 620 comprises default picture element value and produces subelement 621,622 and 623, sub-reference value generation subelement 624 and 625.
Default picture element value produces subelement 621 and is used for finding out previous picture element value (X-1) the corresponding preset picture element value b that is received in the default previous picture element value (F1) of the table 300 of overdriving.
Default picture element value produces subelement 622, and to be used for finding out the present picture element value X correspondence that is received in the default present picture element value (F2) of table 300 of overdriving the most approaching but less than the default picture element value F2 (a-) of described present picture element value.
Default picture element value produces subelement 623, and to be used for finding out the present picture element value X correspondence that is received in the default present picture element value (F2) of table 300 of overdriving the most approaching but greater than the default picture element value F2 (a+) of described present picture element value.
Sub-reference value produces subelement 624 and is used for according to default picture element value b and default picture element value F2 (a-), produce the described first reference value OD (b, a-).Sub-reference value produces subelement 625 and is used for according to default picture element value b and default picture element value F2 (a+), produce the described second reference value OD (b, a+).
Weighted value generation unit 630 is coupled to described storage element 610, is used for finding out the corresponding first weighted value P1 and the second weighted value P2 according to described present picture element value X and formula (1), (2) from described preset weights table 400.
In sum, utilize the method and apparatus of generation extremely drive data of the present invention, can reduce effectively overdrive the table size and can keep output picture quality, the user is provided bigger convenience.
More than explanation is just illustrative for the purpose of the present invention, and nonrestrictive, those of ordinary skills understand; under the situation of the spirit and scope that do not break away from following claims and limited, can make many modifications, change; or equivalence, but all will fall within the scope of protection of the present invention.
Claims (2)
1. method that produces extremely drive data is characterized in that it comprises following steps:
(a) store one and reduce overdrive a table and a preset weights table;
(b), overdrive from described reduction and to show to find out one first reference value and one second reference value according to a previous picture element value and a present picture element value;
(c) according to described present picture element value, find out one first weighted value and one second weighted value from described preset weights table; And
(d) utilize described first reference value, described second reference value, described first weighted value and described second weighted value, produce extremely drive data.
Described reduction is overdrived and is shown to comprise by one first group of default picture element value and one second group of array that default picture element value is constituted; Described step (b) comprises:
(b1) in described first group of default picture element value, find out described previous picture element value pairing one the 3rd default picture element value;
(b2) in described second group of default picture element value, find out described present picture element value pairing one the 4th default picture element value and one the 5th default picture element value;
The described the 4th default picture element value is that the present picture element value correspondence that received is the most approaching but less than the default picture element value of picture element value at present;
The described the 5th default picture element value is that the present picture element value correspondence that received is the most approaching but greater than the default picture element value of picture element value at present;
(b3) according to the described the 3rd default picture element value and the described the 4th default picture element value, produce described first reference value; And
(b4) according to the described the 3rd default picture element value and the described the 5th default picture element value, produce described second reference value;
In described step (c), utilize described present picture element value to preset the difference of picture element value respectively with the described the 4th default picture element value, the 5th, find out described first weighted value and described second weighted value from described preset weights table;
Described first weighted value produces according to a first party formula, and described first party formula is: P1=(C-PR4)/(PR5-PR4), and described second weighted value produces according to a second party formula, and described second party formula is: P2=(PR5-C)/(PR5-PR4); Wherein, on behalf of described first weighted value, C, P1 represent described present picture element value, PR4 to represent the described the 4th default picture element value, PR5 to represent the described the 5th default picture element value, P2 to represent described second weighted value;
Described extremely drive data produces according to an equation, and described equation is: OD=(R1 * P1)+(R2 * P2); Wherein on behalf of described extremely drive data, R1, OD represent described first reference value, P1 to represent described first weighted value, R2 to represent described second reference value, P2 to represent described second weighted value.
2. extremely drive data generation device in order to produce an extremely drive data according to a previous picture element value and a present picture element value, is characterized in that described extremely drive data generation device comprises:
One storage element reduces overdrive a table and a preset weights table in order to store one;
One reference value generation unit is coupled to described storage element, and described reference value generation unit is used for according to described previous picture element value and described present picture element value, overdrives from described reduction and shows to find out corresponding one first reference value and one second reference value;
One weighted value generation unit is coupled to described storage element, and described weighted value generation unit is used for according to described present picture element value, finds out corresponding one first weighted value and one second weighted value from described preset weights table; And
One computing unit is coupled to described reference value generation unit and described weighted value generation unit, and described computing unit is used for according to described first reference value, described second reference value, described first weighted value and described second weighted value, produces extremely drive data;
Described reduction is overdrived and is shown to comprise by one first group of default picture element value and one second group of array that default picture element value is constituted;
Described reference value generation unit comprises:
One the 3rd default picture element value produces subelement, is used for finding out described previous picture element value pairing one the 3rd default picture element value in described first group of default picture element value;
One the 4th default picture element value produces subelement, is used for finding out described present picture element value pairing one the 4th default picture element value in described second group of default picture element value;
One the 5th default picture element value produces subelement, is used for finding out described present picture element value pairing one the 5th default picture element value in described second group of default picture element value;
The described the 4th default picture element value is that the present picture element value correspondence that received is the most approaching but less than the default picture element value of picture element value at present;
The described the 5th default picture element value is that the present picture element value correspondence that received is the most approaching but greater than the default picture element value of picture element value at present;
One first sub-reference value produces subelement, is used for producing described first reference value according to the described the 3rd default picture element value and the described the 4th default picture element value; And
One second sub-reference value produces subelement, is used for producing described second reference value according to the described the 3rd default picture element value and the described the 5th default picture element value;
Described first weighted value and described second weighted value utilize described present picture element value to preset the difference of picture element value respectively with the described the 4th default picture element value, the 5th, find out from described preset weights table;
Described first weighted value produces according to a first party formula, and described first party formula is: P1=(C-PR4)/(PR5-PR4), and described second weighted value produces according to a second party formula, and described second party formula is: P2=(PR5-C)/(PR5-PR4); Wherein, on behalf of described first weighted value, C, P1 represent described present picture element value, PR4 to represent the described the 4th default picture element value, PR5 to represent the described the 5th default picture element value, P2 to represent described second weighted value;
Described extremely drive data produces according to an equation, and described equation is: OD=(R1 * P1)+(R2 * P2); Wherein on behalf of described extremely drive data, R1, OD represent described first reference value, P1 to represent described first weighted value, R2 to represent described second reference value, P2 to represent described second weighted value.
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| CN2008101330821A CN101334984B (en) | 2008-07-08 | 2008-07-08 | Method and apparatus generating extremely drive data |
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| CN2008101330821A CN101334984B (en) | 2008-07-08 | 2008-07-08 | Method and apparatus generating extremely drive data |
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| CN101334984B true CN101334984B (en) | 2010-07-07 |
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| US9280943B2 (en) | 2009-02-13 | 2016-03-08 | Barco, N.V. | Devices and methods for reducing artefacts in display devices by the use of overdrive |
| CN102402963B (en) * | 2011-12-02 | 2013-06-05 | 深圳市华星光电技术有限公司 | Drive circuit and drive method for liquid crystal display |
| CN103680448B (en) * | 2013-12-11 | 2015-07-01 | 深圳市华星光电技术有限公司 | Method for calculating overdrive target value |
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