CN103000149B - Frame rate conversion (FRC) driving method - Google Patents
Frame rate conversion (FRC) driving method Download PDFInfo
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- CN103000149B CN103000149B CN201210465556.9A CN201210465556A CN103000149B CN 103000149 B CN103000149 B CN 103000149B CN 201210465556 A CN201210465556 A CN 201210465556A CN 103000149 B CN103000149 B CN 103000149B
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Abstract
An embodiment of the invention discloses an FRC driving method, belongs to the display technical field, and solves the technical problem of poor display such as residual images due to unipolarity charge accumulation on a polyimide (PI) layer caused by the existing FRC driving method. The FRC driving method is used for processing pixel units driven by grayscales added in the FRC through a point turnover driving mode and includes exerting voltage on a first group of sub pixels in the pixel units in the first frame; exerting the voltage on the first group of sub pixels in the pixel units in the second frame, wherein the first group of sub pixels comprises at least four sub pixels at the same position and with opposite polarity between two frames; exerting the voltage on a second group of sub pixels in the pixel units in the third frame; and exerting the voltage on the second group of sub pixels in the pixel units in the fourth frame, wherein the second group of sub pixels comprises at least four sub pixels at the same position and with opposite polarity between two frames. The method is applicable to liquid crystal displays in the advanced super dimension switch (ADS) mode.
Description
Technical field
The invention belongs to display technique field, be specifically related to a kind of frame rate conversion driving method.
Background technology
Along with the development of display technique, Thin Film Transistor-LCD (Thin Film Transistor Liquid Crystal Display is called for short TFT-LCD) occupies leading position in flat display field.
The driving circuit of existing liquid crystal display many employings 6bit input and output, the GTG of actual displayed is 2
6individual, i.e. 64 GTGs.The liquid crystal display of 6bit input and output can pass through frame rate conversion (Frame Rate Conversion, be called for short FRC) driving method, each sub-pix is distributed over time and space, improve the grey exponent number of each pixel cell, 256 GTGs can be demonstrated, be equivalent to the liquid crystal display of 8bit input and output.
Concrete grammar is that the division by sub-pix increases by three transition pictures between every two original GTGs, namely increase by 01 at former data end, 10,11 3 kind of suffix, corresponding three transition pictures.As shown in Figure 1, Figure 2 and Figure 3, each pixel cell is divided into 16 sub-pixs, 01,10, namely 11 3 kind of transition picture represent N+0.25, N+0.5, N+0.75 tri-GTGs increased between former GTG N and GTG N+1.With picture 01,4 sub-pixs are had to be that N+1(is as the dash area in figure as the GTG shown by a group in 16 sub-pixs), the GTG of all the other 12 sub-pix displays is that N(is as the white portion in figure), the average GTG of such 16 sub-pixs is exactly N+0.25, and in continuous print 4 frame, each frame gray scale is that one group of sub-pix of N+1 is not identical, makes each sub-pix all show a frame N+1 GTG and three frame N GTGs.Through F1 to F4 four frame continuous print picture, the visual effect that GTG is N+0.25 just can be reached.GTG is that the displaying principle of N+0.5 with N+0.75 is identical with the displaying principle of above-mentioned N+0.25 GTG, and be namely in 16 sub-pixs, have the GTG of 8 or 12 sub-pixs to be N+1 respectively, the GTG of all the other sub-pixs is N.
Above-mentioned FRC driving method can be applicable to senior super Wei Chang and changes (Advanced super Dimension Switch, be called for short ADS) liquid crystal display of pattern, in procedure for displaying, contrary to the polarity of pixel cell in adjacent two frames, so also replace frame by frame the polarity of the electric field that pixel cell applies.But, due to the polyimide (Polyimide of the liquid crystal display of ADS pattern, be called for short PI) layer easy stored charge formation electric charge remnants, when applying existing FRC driving method, wherein one or more groups sub-pix of a pixel cell is always applied in positive electric field, other one or more groups sub-pix is always applied in negative electric field, the accumulation of unipolar charge will be caused to the PI layer of these sub-pixs, metallics originally free in liquid crystal layer is offseted to one side, affect the normal rotation of liquid crystal molecule, cause luminance deviation, produce the bad display phenomenons such as image retention.
Summary of the invention
Embodiments provide a kind of frame rate conversion (FRC) driving method, solve existing FRC driving method and easily cause the unipolar charge of PI layer to accumulate, cause the technical matters of the bad display phenomenons such as image retention.
For achieving the above object, embodiments of the invention adopt following technical scheme:
This FRC driving method, adopt the type of drive of some upset, process for the pixel cell driven the GTG added in frame rate conversion, described driving method comprises:
At the first frame, voltage is applied to group sub-pix of first in described pixel cell;
At the second frame, voltage is applied to group sub-pix of first in described pixel cell;
Wherein, described first group of sub-pix is opposite polarity at least 4 sub-pixs of same position between two frames.
Further, this driving method also comprises:
At the 3rd frame, voltage is applied to group sub-pix of second in described pixel cell;
At the 4th frame, voltage is applied to group sub-pix of second in described pixel cell;
Wherein, described second group of sub-pix is opposite polarity at least 4 sub-pixs of same position between two frames.
Preferably, the GTG added in described frame rate conversion is 01,10,11.
Preferably, described in same GTG, first group of sub-pix is equal with the sub-pix quantity of described second group of sub-pix.
Preferably, described pixel cell is divided into 16 sub-pixs, and the sub-pix quantity of described first group of sub-pix or described second group of sub-pix is 4,8 or 12.
Further, 16 sub-pixs in described pixel cell are 4 × 4 matrix arrangement.
Further, in described pixel cell, form first group of sub-pix with 4 sub-pixs by 1 sub-pix in often going;
Or, form first group of sub-pix with 8 sub-pixs by 2 sub-pixs in often going;
Or, form first group of sub-pix with 12 sub-pixs by 3 sub-pixs in often going.
Compared with prior art, technique scheme tool provided by the present invention has the following advantages: in this FRC driving method, at the first frame, applies voltage to group sub-pix of first in pixel cell; At the second frame, the polarity of this first group of sub-pix can become the opposite polarity polarity with the first frame, again voltage is applied to this first group of sub-pix, namely in adjacent two frames, respectively voltage is applied to opposite polarity same group of sub-pix, and execute alive normally equal-sized in adjacent two frames.Therefore, in these sub-pixs, can cancel out each other at the electric charge of adjacent two frame remnants, avoid the unipolar charge accumulation of PI layer and the bad display phenomenons such as the image retention that causes, thus solve the technical matters that existing FRC driving method easily produces the phenomenons such as image retention.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 to Fig. 3 is the schematic diagram of the embodiment of existing FRC driving method of the present invention;
The schematic diagram of the embodiment of the FRC driving method that Fig. 4 to Fig. 6 provides for embodiments of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the prerequisite not paying creative work, all belongs to the scope of protection of the invention.
Embodiment 1:
Frame rate conversion (FRC) driving method that the embodiment of the present invention provides is applied to the liquid crystal display of ADS pattern, adopt the type of drive of some upset, as an a kind of mode for upset, also (1+2) line point can be made to overturn, namely except the first row, from the every two row upsets of the polarity of the second row starting pixel unit once.The pixel cell that this FRC driving method is used for the GTG that adds in frame rate conversion drives processes, between every two adjacent GTGs, add 01,10,11 3 GTG, to realize 64 GTGs to expand to 256 GTGs.Pixel cell shown in Fig. 4 divides in order to 16 sub-pixs, for the corresponding GTG N+0.25 of transition picture 01(), the FRC driving method of this pixel cell comprises:
S11: at the first frame F1, applies voltage to group sub-pix of first in pixel cell.
Concrete, as shown in the first frame F1 picture in Fig. 4, 16 sub-pixs in this pixel cell are 4 × 4 matrix arrangement, wherein first group of sub-pix is opposite polarity 4 sub-pixs of same position between two frames, specifically by the 1st sub-pix of the 1st row and the 3rd row, form with the 3rd sub-pix of the 2nd row and the 4th row, the voltage of different size is applied respectively to this first group of sub-pix and all the other 12 sub-pixs, the GTG making this first group of sub-pix display is that N+1(is as the dash area in figure), the GTG of all the other 12 sub-pix displays is that N(is as the white portion in figure), the average GTG of this pixel cell is N+0.25.
Understandable, if now N=0, i.e. the GTG of first group of sub-pix display is 1, and the GTG of all the other 12 sub-pixs displays is 0, then only need apply voltage to first group of sub-pix, does not need to apply voltage to all the other 12 sub-pixs.
S12: at the second frame F2, applies voltage to group sub-pix of first in pixel cell.
Concrete, as shown in the second frame F2 picture in Fig. 4, this first group of sub-pix can become the opposite polarity polarity with F1 in the polarity of F2, the voltage of different size is applied respectively to above-mentioned first group of sub-pix and all the other 12 sub-pixs, the GTG making this first group of sub-pix display is N+1, the GTG of all the other 12 sub-pix displays is N, and the average GTG of this pixel cell is N+0.25.This step, compared with above-mentioned steps S11, is only that the polarity of each sub-pix is contrary.
In the FRC driving method that the embodiment of the present invention provides, in F1, voltage is applied to group sub-pix of first in this pixel cell; In F2, again voltage is applied to this first group of sub-pix opposite polarity, namely in adjacent two frames, respectively voltage is applied to opposite polarity same group of sub-pix, and in adjacent two frames to execute alive size be also equal.Therefore, in first group of sub-pix, can cancel out each other at the electric charge of adjacent two frame remnants, avoid the unipolar charge accumulation of PI layer and the bad display phenomenons such as the image retention that causes, thus solve the technical matters that existing FRC driving method easily produces the phenomenons such as image retention.
Further, the FRC driving method that the embodiment of the present invention provides also comprises:
S13: at the 3rd frame F3, applies voltage to group sub-pix of second in pixel cell.
Concrete, as shown in the 3rd frame F3 picture in Fig. 4, second group of sub-pix in this pixel cell is also opposite polarity 4 sub-pixs of same position between two frames, equal with the sub-pix quantity of first group of sub-pix, specifically by the 2nd sub-pix of the 1st row and the 3rd row, form with the 4th sub-pix of the 2nd row and the 4th row, the voltage of different size is applied respectively to this second group of sub-pix and all the other 12 sub-pixs, the GTG making this second group of sub-pix display is N+1, the GTG of all the other 12 sub-pix displays is N, the average GTG of this pixel cell is N+0.25.
S14: at the 4th frame F4, applies voltage to group sub-pix of second in pixel cell.
Concrete, as shown in the 4th frame F4 picture in Fig. 4, this second group of sub-pix can become the opposite polarity polarity with F3 in the polarity of F4, the voltage of different size is applied respectively to above-mentioned second group of sub-pix and all the other 12 sub-pixs, the GTG making this second group of sub-pix display is N+1, the GTG of all the other 12 sub-pix displays is N, and the average GTG of this pixel cell is N+0.25.This step, compared with above-mentioned steps S13, is only that the polarity of each sub-pix is contrary.
In the FRC driving method that the embodiment of the present invention provides, by F1, F2 two frame and F3, F4 afterwards totally four frames form one group of transition picture, and can this four frames picture of Circulating fibrocytes, this pixel cell is reached visual effect that GTG is N+0.25.
Identical with F1, F2 before, in F3 afterwards, voltage is applied to group sub-pix of second in this pixel cell; In F4, apply voltage again to this second group of sub-pix opposite polarity, be also apply equal-sized voltage to opposite polarity same group of sub-pix respectively in adjacent two frames.Therefore, in second group of sub-pix, also can cancel out each other at the electric charge of adjacent two frame remnants, avoid the unipolar charge accumulation of PI layer and the bad display phenomenons such as the image retention that causes equally, solve the technical matters that existing FRC driving method easily produces the phenomenons such as image retention.
Embodiment 2:
The present embodiment is substantially the same manner as Example 1, is also the liquid crystal display this FRC driving method being applied to ADS pattern, adopts the type of drive of some upset, processes for the pixel cell driven the GTG added in frame rate conversion.The present embodiment is for the corresponding GTG N+0.5 of transition picture 10() be described, this FRC driving method comprises:
S21: at the first frame F1, applies voltage to group sub-pix of first in pixel cell.
Concrete, as shown in the first frame F1 picture in Fig. 5, 16 sub-pixs in this pixel cell are identical with embodiment 1, also be in 4 × 4 matrix arrangement, and first group of sub-pix is wherein opposite polarity 8 sub-pixs of same position between two frames, specifically by the 1st of the 1st row and the 4th row, 3rd sub-pix, with the 2nd row and the 3rd row the 2nd, 4th sub-pix composition, the voltage of different size is applied respectively to this first group of sub-pix and all the other 8 sub-pixs, the GTG making this first group of sub-pix display is N+1, the GTG of all the other 8 sub-pix displays is N, the average GTG of this pixel cell is N+0.5.
S22: at the second frame F2, applies voltage to group sub-pix of first in pixel cell.
Concrete, as shown in the second frame F2 picture in Fig. 5, this first group of sub-pix can become the opposite polarity polarity with F1 in the polarity of F2, the voltage of different size is applied respectively to above-mentioned first group of sub-pix and all the other 8 sub-pixs, the GTG making this first group of sub-pix display is N+1, the GTG of all the other 8 sub-pix displays is N, and the average GTG of this pixel cell is N+0.5.This step, compared with above-mentioned steps S21, is only that the polarity of each sub-pix is contrary.
S23: at the 3rd frame F3, applies voltage to group sub-pix of second in pixel cell.
Concrete, as shown in the 3rd frame F3 picture in Fig. 5, second group of sub-pix in this pixel cell is also opposite polarity 8 sub-pixs of same position between two frames, equal with the sub-pix quantity of first group of sub-pix, specifically by the 2nd of the 1st row and the 4th row, 4th sub-pix, with the 2nd row and the 3rd row the 1st, 3rd sub-pix composition, the voltage of different size is applied respectively to this second group of sub-pix and all the other 8 sub-pixs, the GTG making this second group of sub-pix display is N+1, the GTG of all the other 8 sub-pix displays is N, the average GTG of this pixel cell is N+0.5.
S24: at the 4th frame F4, applies voltage to group sub-pix of second in pixel cell.
Concrete, as shown in the 4th frame F4 picture in Fig. 5, this second group of sub-pix can become the opposite polarity polarity with F3 in the polarity of F4, the voltage of different size is applied respectively to above-mentioned second group of sub-pix and all the other 8 sub-pixs, the GTG making this second group of sub-pix display is N+1, the GTG of all the other 8 sub-pix displays is N, and the average GTG of this pixel cell is N+0.5.This step, compared with above-mentioned steps S23, is only that the polarity of each sub-pix is contrary.
In the FRC driving method that the embodiment of the present invention provides, by F1, F2, F3, F4 totally four frames form one group of transition picture, and can this four frames picture of Circulating fibrocytes, this pixel cell is reached visual effect that GTG is N+0.5.
In the FRC driving method that the embodiment of the present invention provides, in F1, voltage is applied to group sub-pix of first in this pixel cell, in F2, again voltage is applied to this first group of sub-pix opposite polarity; Afterwards, in F3, voltage is applied to group sub-pix of second in this pixel cell, in F4, again voltage is applied to this second group of sub-pix opposite polarity, namely at adjacent two frame F1, F2, and respectively equal-sized voltage is applied respectively to opposite polarity same group of sub-pix in adjacent two frame F3, F4.Therefore, in first group of sub-pix and second group of sub-pix, can both cancel out each other at the electric charge of adjacent two frame remnants, avoid the unipolar charge accumulation of PI layer and the bad display phenomenons such as the image retention that causes, thus solve the technical matters that existing FRC driving method easily produces the phenomenons such as image retention.
Embodiment 3:
The present embodiment and embodiment 1, embodiment 2 are substantially identical, are also the liquid crystal display this FRC driving method being applied to ADS pattern, adopt a type of drive for some upset, process for the pixel cell driven the GTG added in frame rate conversion.The present embodiment is for the corresponding GTG N+0.75 of transition picture 11() be described, this FRC driving method comprises:
S31: at the first frame F1, applies voltage to group sub-pix of first in pixel cell.
Concrete, as shown in the first frame F1 picture in Fig. 6,16 sub-pixs in this pixel cell and embodiment 1, embodiment 2 are identical, also be in 4 × 4 matrix arrangement, and first group of sub-pix is wherein opposite polarity 12 sub-pixs of same position between two frames, specifically by the 2nd, the 3rd, the 4th sub-pix of the 1st row and the 3rd row, and the 1st, the 2nd, the 4th sub-pix composition of the 2nd row and the 4th row.Apply the voltage of different size respectively to this first group of sub-pix and all the other 4 sub-pixs, the GTG making this first group of sub-pix display is N+1, and the GTG of all the other 4 sub-pix displays is N, and the average GTG of this pixel cell is N+0.7.
In fact, the voltage that in the present embodiment, each sub-pix of F1 applies, just in time contrary with the F1 in embodiment 1, be equivalent to 12 sub-pixs beyond using group sub-pix of first in embodiment 1 as group sub-pix of first in the present embodiment, and the voltage of GTG corresponding to N+1 in addition; Simultaneously using 4 sub-pixs of group sub-pix of first in embodiment 1 in the present embodiment beyond first group of sub-pix, and the in addition voltage of GTG corresponding to N.
S32: at the second frame F2, applies voltage to group sub-pix of first in pixel cell.
Concrete, as shown in the second frame F2 picture in Fig. 6, this first group of sub-pix can become the opposite polarity polarity with F1 in the polarity of F2, the voltage of different size is applied respectively to above-mentioned first group of sub-pix and all the other 4 sub-pixs, the GTG making this first group of sub-pix display is N+1, the GTG of all the other 4 sub-pix displays is N, and the average GTG of this pixel cell is N+0.75.This step, compared with above-mentioned steps S31, is only that the polarity of each sub-pix is contrary.
S33: at the 3rd frame F3, applies voltage to group sub-pix of second in pixel cell.
Concrete, as shown in the 3rd frame F3 picture in Fig. 6, second group of sub-pix in this pixel cell is also opposite polarity 12 sub-pixs of same position between two frames, equal with the sub-pix quantity of first group of sub-pix, specifically by the 1st of the 1st row and the 3rd row, 3rd, 4th sub-pix, with the 2nd row and the 4th row the 1st, 2nd, 3rd sub-pix composition, the voltage of different size is applied respectively to this second group of sub-pix and all the other 4 sub-pixs, the GTG making this second group of sub-pix display is N+1, the GTG of all the other 4 sub-pix displays is N, the average GTG of this pixel cell is N+0.75.Accordingly, the voltage that in the present embodiment, each sub-pix of F3 applies, also be contrary with the F3 in embodiment 1, namely second group of sub-pix in the present embodiment corresponds to 12 sub-pixs in embodiment 1 beyond second group of sub-pix, 4 sub-pixs simultaneously in the present embodiment beyond second group of sub-pix correspond to second group of sub-pix in embodiment 1, but the magnitude of voltage applied is different.
S34: at the 4th frame F4, applies voltage to group sub-pix of second in pixel cell.
Concrete, as shown in the 4th frame F4 picture in Fig. 6, this second group of sub-pix can become the opposite polarity polarity with F3 in the polarity of F4, the voltage of different size is applied respectively to above-mentioned second group of sub-pix and all the other 4 sub-pixs, the GTG making this second group of sub-pix display is N+1, the GTG of all the other 4 sub-pix displays is N, and the average GTG of this pixel cell is N+0.75.This step, compared with above-mentioned steps S33, is only that the polarity of each sub-pix is contrary.
In the FRC driving method that the embodiment of the present invention provides, by F1, F2, F3, F4 totally four frames form one group of transition picture, and can this four frames picture of Circulating fibrocytes, this pixel cell is reached visual effect that GTG is N+0.75.
In the FRC driving method that the embodiment of the present invention provides, in F1, voltage is applied to group sub-pix of first in this pixel cell, in F2, again voltage is applied to this first group of sub-pix opposite polarity; Afterwards, in F3, voltage is applied to group sub-pix of second in this pixel cell, in F4, again voltage is applied to this second group of sub-pix opposite polarity, namely at adjacent two frame F1, F2, and respectively equal-sized voltage is applied respectively to opposite polarity same group of sub-pix in adjacent two frame F3, F4.Therefore, in first group of sub-pix and second group of sub-pix, can both cancel out each other at the electric charge of adjacent two frame remnants, avoid the unipolar charge accumulation of PI layer and the bad display phenomenons such as the image retention that causes, thus solve the technical matters that existing FRC driving method easily produces the phenomenons such as image retention.
Above-mentioned three embodiments are all that a pixel cell is divided into 16 sub-pixs, also the average GTG in a pixel cell pixel cell can be divided into the sub-pix of 4,8 or other quantity in other embodiments, as long as can reach N+0.25, N+0.5, N+0.75 respectively.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (6)
1. a frame rate conversion driving method, adopts the type of drive of some upset, it is characterized in that, process, comprising for the pixel cell driven the GTG added in frame rate conversion:
At the first frame, voltage is applied to group sub-pix of first in described pixel cell;
At the second frame, voltage is applied to group sub-pix of first in described pixel cell;
Wherein, described first group of sub-pix is opposite polarity at least 4 sub-pixs of same position between two frames;
At the 3rd frame, voltage is applied to group sub-pix of second in described pixel cell;
At the 4th frame, voltage is applied to group sub-pix of second in described pixel cell;
Wherein, described second group of sub-pix is opposite polarity at least 4 sub-pixs of same position between two frames;
In described first frame and described second frame, the GTG of described first group of sub-pix is identical, in described 3rd frame and described 4th frame, the GTG of described second group of sub-pix is identical, and the GTG of pixel cell is identical described in described first frame, described second frame, described 3rd frame and described 4th frame.
2. driving method according to claim 1, is characterized in that, the GTG added in described frame rate conversion is 01,10,11.
3. driving method according to claim 2, is characterized in that: described in same GTG, first group of sub-pix is equal with the sub-pix quantity of described second group of sub-pix.
4. driving method according to claim 3, is characterized in that: described pixel cell is divided into 16 sub-pixs, and the sub-pix quantity of described first group of sub-pix is 4,8 or 12.
5. driving method according to claim 4, is characterized in that: 16 sub-pixs in described pixel cell are 4 × 4 matrix arrangement.
6. driving method according to claim 5, is characterized in that: in described pixel cell, forms first group of sub-pix with 4 sub-pixs by 1 sub-pix in often going;
Or, form first group of sub-pix with 8 sub-pixs by 2 sub-pixs in often going;
Or, form first group of sub-pix with 12 sub-pixs by 3 sub-pixs in often going.
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| TW201533726A (en) * | 2014-02-17 | 2015-09-01 | Au Optronics Corp | Image display method of half-source-driving liquid crystal display |
| CN106683608B (en) * | 2017-01-06 | 2020-04-14 | 京东方科技集团股份有限公司 | Display panel driving method, display panel and display device |
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| CN100458880C (en) * | 2006-10-30 | 2009-02-04 | 友达光电股份有限公司 | Method for driving display, and a photoelectric device |
| KR101222987B1 (en) * | 2007-05-11 | 2013-01-17 | 엘지디스플레이 주식회사 | Liquid Crystal Display and Driving Method thereof |
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